• What is LED TV and its advantages. What is LED TV

    Models of LED-backlit TVs dominate the market and deservedly so. In this article we will look at the types of LED backlights on modern TVs and evaluate their effectiveness.

    LED TVs

    Let's start with the fact that LED TV is not a new type of HDTV . Unlike plasma and O LED TV ov, which are manufactured on the basis of emitting technologies, where each pixel is a separate light source, in liquid crystal models, each pixel of the LCD matrix requires lighting (from behind or from the side through a lens system). So LED HDTV models are the same liquid crystal (LCD or LCD) TVs, but they have a built-in light-emitting diode (LED) backlight, which replaces the standard cold cathode fluorescent lamp (abbreviated CCFL).

    2 types of LED backlight according to design: matrix and side


    LED backlighting with local dimming.     First, televisions with LED backlight, used to illuminate the cells of the LCD matrix " full array"(full array) of LEDs, similar to standard TVs based on backlighting using CCFL lamps. But to change the thickness of TVs downward, the developers abandoned the use of a full array of LEDs behind the screen, installing lines of light sources on the side of the LCD panel. Thus, the distribution of light from LED sources over the entire screen area is carried out using LEDs special form. These LCD TV models are called TV with side or regional LED backlight, which still dominate today.

    LED lighting with local dimming system allows you to automatically reduce the brightness or completely turn off individual groups of backlight sources. Most modern LCD TVs with LED backlighting are equipped with a full array of LED sources placed behind the LCD panel. dynamic backlight technology also called local or local dimming. Using local dimming, specific areas of the overall backlight LED array become darker or lighter depending on the brightness and color of the corresponding part of the image on the screen.

    The ability to darken a specific area of ​​the screen can reduce the amount of light that passes through the closed pixels of the LCD panel, which has a positive effect on the rendering of blacks, which become darker and more realistic. Because black levels are critical to contrast, the perception of depth on black surfaces, full-color images become more vibrant and clear. Local dimming technology has the only drawback - the effect of local dimming, which is formed when part of the light from brighter zones leaks into neighboring darker ones, which subsequently brightens the border dark color. It is quite difficult to notice the clouding effect on most models, since the disadvantage is directly related to the number of local dimming zones behind the screen, and manufacturers do not always provide such information.

    When using standard backlighting using CCFL lamps and in most LCD TVs with edge LED backlighting, all backlight sources brighten or dim at the same time (the so-called " global dimming"), but among TV models from Samsung and LG there are rarely displays with side LED backlighting, which can also work on the principle of local dimming (“precision dimming” for Samsung and “LED Plus” for LG). To put it simply, this is a local dimming sham.

    Thin models with side LED backlight Of course, they suffer from uneven screen illumination, but not everyone. Main feature of TVs with side LED backlighting– a thin body, therefore it is difficult to ensure uniform distribution of the light flux over the entire plane of the screen. When purchasing a TV, play an image of the white surface on the edge-lit LED display screen to check that there are no brighter areas around the edges of the screen. Likewise, when the screen is filled with a black field, the edges should not appear lighter (gray).

    It is also worth noting that LED backlighting, regardless of the type, does not improve the viewing angles of the LCD panel. The black level drops when using LED backlighting and possibly shifting the viewing angle by 1-2 meters to the left or right.

    We must not forget about the energy efficiency of LED backlighting. Of course, the consumption of any model is significantly affected by the size of the screen and the brightness of the backlight sources. LCD TV models of both types of LED backlighting are much more energy efficient compared to plasma models.

    LED backlights for LCD displays are divided into categories according to the following criteria:

    • glow color: white or RGB;
    • lighting uniformity: static or dynamic;
    • design: matrix or side (this is described in more detail above)

    RGB backlighting is used to fine-tune the light spectrum. In addition, additional compensation for changes in the emission spectrum of LEDs over time is often applied. LED TVs with RGB LED backlighting light up different areas of the screen depending on the color of the image. Colored backlighting provides enhanced contrast and deep blacks, as demonstrated by many Sony LED TVs.

    Edge LED: Better Color Rendering

    Sony in new flagship models TVs - for example, the W905 line - uses Triluminos technology. The LED backlight (Edge LED) built into the frame of the TV on all sides of the screen is complemented by so-called quantum dots - fragments of a semiconductor several hundred atoms in size that emit light in a strictly specified range. Triluminos technology is designed to minimize color distortion and provide enhanced red and green tones. This will allow you to achieve an extremely uniform and natural image with a significantly wider color gamut. Tests of the first devices with Triluminos support did not disappoint us: the color gamut of the Sony KDL-46W905A model is comparable to that of organic light-emitting diode (OLED) solutions and is unattainable for LED-backlit LCD TVs. The W805 and W605 series devices, which also went on sale this year, do not use Triluminos, making their cost significantly lower. In the future, manufacturers will be able to completely abandon LED backlighting in favor of quantum dots.

    OLED TVs: brightness and color at their best

    TVs with OLED screens have already reached stores, and developers have rushed to release new models with concave displays. Last year, LG planned to introduce a 55-inch OLED TV to the market, but it only went on sale this summer. In Russia, the 55EM9600 model and its improved analogue 55EM9700 will cost the buyer 500,000 rubles. In addition, the device is sold in Europe, the USA and some other countries.

    Advantages of OLED TVs: it is not a type of backlight, but a different technology

    • accurate color reproduction
    • greater brightness margin compared to other technologies
    • high contrast compared to LCD models (another imaging technology).
    • absence of an LCD matrix and LED backlight - their place was taken by a matrix made of light-emitting organic diodes.

    Samsung and LG independently developed OLED TVs with concave screens (Curved OLED). This design is designed to minimize distortion at the edges of the image and increase detail. New items are still available in limited quantities in South Korea, the USA and some European countries. The 55-inch model Samsung KN55S9C is priced by the manufacturer at $9,000 (300,000 rubles).

    Of particular interest is also Multi-View technology, implemented in many models of OLED TVs, both flat and concave screens. Due to their exceptionally fast response time, such devices allow you to simultaneously show two or four programs in high definition (Full HD) or two different films in 3D format. Shutter glasses are used to separate the image. Each viewer can use the controls located on the glasses to select an individual program for viewing. At the same time, thanks to the built-in headphones, playback of the soundtrack corresponding to the film is ensured.

    If you want to enjoy watching your favorite movies, TV series and TV shows in the evenings, then you just need to buy a good LED TV. Nowadays, equipment manufacturers offer a huge number of such devices at different prices. Find out what an LED TV is. These TV panels have a huge number of advantages and will delight their owners with high-quality, bright images.

    What are LED TVs

    An LED TV is a device that is a TV receiver with a liquid crystal screen. The matrix is ​​equipped with a special backlight from a set of LEDs. Explanation of the abbreviation LED - “Light Emitting Diode”. From a technical point of view, it would be more correct to call such devices liquid crystal with LED backlighting. However, the first similar device launched by Samsung under the name “LED TV”. Other manufacturers adopted it, so it became common.

    LED backlight

    Now releasing different types such devices. They differ in the type of LEDs used and the order of their location in relation to the screen. By lamp color:

    1. Single color (White LED). Budget option. It does not have the disadvantages of fluorescent backlighting and creates an image with a similar color gamut, but not as contrasty.
    2. Multi-colored (basic RGB LED color triad). The color palette is expanded due to the LED brightness control. The number of semitones has been increased. To support this technology you need a powerful GPU. The model will cost more and consume more energy.
    3. Mixed. Blue LED backlights and a special film with green and red quantum dots. This technology reduces the device's power consumption.

    We found out what LED backlighting is on a TV. In addition to the color of the lamps, it differs in their location. There are two options:

    1. Directly behind the LCD matrix. Direct backlight type Full or Direct LED. These models are cheaper than Edge, but not as thin. WITH high level contrast. They have white and multi-colored LEDs.
    2. Along the perimeter of the LCD matrix. Edge LED backlight type. LEDs can be located on one (bottom), two (side) or four sides of the screen. Thanks to this, manufacturers produce models less than 1 cm thick in these LED devices white. Budget models made using this technology have a drawback. They show highlights along the edges of the screen. In addition, they have a low contrast level.

    Characteristics

    There is a huge variety of models from different manufacturers on the market. They differ in price depending on the parameters they have. To make it easier to choose a model based on your budget when purchasing, learn to at least understand key characteristics which he has led tv:

    1. Permission. There are several options: Full HD, HD Ready, Ultra HD. The latter is considered the best.
    2. Smart function. Thanks to this option, you can access the Internet directly from the device. There are models with and without a built-in router.
    3. Sweep frequency. Shows how many times the image is updated per unit of time.
    4. 3D image function. If you plan to watch films in this format, then choose from two display technology options: active and passive. Compare both options in the store and determine which is more comfortable for your eyes.
    5. Matte or glossy screen. The first one does not have such a large viewing angle, but the second one has glare.

    Advantages

    An LED TV is nothing more than an LCD screen, but improved. LCDs used to use CCFL cold cathode fluorescent lamps as the light source. They were replaced with LED lighting. This freed liquid crystal devices from their characteristic disadvantages. Thanks to LED technology, TVs have become thinner (especially Edge models). They are environmentally cleaner and energy efficient, do not contain mercury, and do not require specialized disposal. Advantages:

    • more contrast image compared to other technologies;
    • maximum screen viewing angles;
    • rich and natural colors;
    • consumption of a relatively small amount of energy;
    • display high definition signals;
    • thin body.

    LED TVs

    There is a huge range of panels from different manufacturers on sale. You can easily choose both a budget small device and a huge one with many additional functions and capabilities. Some panels can be used not only for watching movies, but also for playing games on the console. Find out which models from well-known manufacturers are the most popular.

    Shivaki

    • Model name: Shivaki STV-48LED15;
    • price: 24,000 rubles;
    • characteristics: black, screen diagonal - 48 inches (121 cm), refresh rate - 50 Hz, resolution 1920x1080 dpi, video in Full HD format, sound power - 16 W, four digital tuner, 3 HDMI ports, 1 USB connector for viewing multimedia files from external media, has a recording function, child lock option, weight – 11.5 kg;
    • pros: fits well into any design, can be placed on a shelf or mounted on a wall, reasonable cost, high-quality image;
    • cons: no Smart TV, Wi-Fi, 3D capabilities, surround sound, few functions, poor response to the remote control remote control, inconvenient menu.

    TCL

    This company has a lot of TV options: plasma, LCD, LED. They are distinguished by good quality and affordable prices. You may be interested in the following option, budget but worthy:

    • Model name: TCL LED32D2930;
    • price: 14500 rub.;
    • characteristics: diagonal 32 inches (81.3 cm), resolution 1366x768 Pixels, brightness 240 cd/sq. m, 16:9 format, progressive scan, 60 Hz refresh rate, Smart TV, timers, child lock, teletext, program guide, 2 built-in speakers, stereo sound power 10 W, surround sound, Wi-Fi? connectors – component, 3 HDMI, PC input, coaxial audio output, 1 USB, black;
    • pros: cheap, can be hung on the wall or put on display, good picture and sound quality, bright colors;
    • Cons: too fragile, cannot be used instead of a monitor.

    Samsung

    The company's products include a huge number of LED TVs. Nowadays this one is especially popular:

    • Model name: Samsung UE40MU6100UXRU;
    • price: 36,000 rub.;
    • characteristics: diagonal 40 inches (101.6 cm), Edge LED backlight, 16:9 format, Ultra HD, resolution 3840x2160 pixels, HDR support, Smart TV, voice control, timers, program list, channel name entry, protection from children, Russian menu, program guide, teletext, digital noise reduction, comb filter, image and sound enhancement technologies, decoder with automatic and manual settings, 2 built-in speakers, sound power 20 W, 3 HDMI connectors, 2 USB ports, Wi- Fi, Bluetooth;
    • pros: natural colors, stylish design, the remote control is universal and controls all devices connected to the LED TV, connects to mobile device, excellent quality pictures;
    • cons: slows down when playing very large files.

    LG

    All LED TVs from this company are of high quality, durable and attractive. modern design. This option will fit perfectly into a stylish interior:

    • model name: Ultra HD (4K) LG 43UH619V;
    • price: 32,000 rub.;
    • characteristics: white, diagonal 43 inches (109.2 cm), Direct LED backlight, 16:9 format, Ultra HD available, resolution 3849x2160 pixels, progressive scan, anti-glare coating, Smart TV, input of channel names, child lock, menu Russified, teletext, program guide, Plug&Play function, dynamic scene index, digital noise reduction, comb filter, 2 built-in speakers, sound power 10 W, surround sound, 3 HDMI ports, 1 USB connector, Wi-Fi;
    • pros: good image detail, detailed clear instructions, loud and clear sound, a lot of useful functions and modes;
    • disadvantages: there is distortion of the picture when viewed from different angles, few applications, you often need to adjust the screen format to different types of files, inconvenient mounting on the wall.

    Mystery

    Among the wide range of this manufacturer there are a lot of inexpensive and high-quality models. Pay attention to this option:

    • model name: Mystery MTV-4030LT2;
    • price: 18,000 rub.;
    • characteristics: diagonal 40 inches (101.6 cm), Direct LED backlight, 16:9 format, Full HD, resolution 1920x1080 pixels, progressive scan, refresh rate 60 Hz, timers, clock, input of channel names, program list, protection against children, freeze frame, Russian menu, blue screen, shutdown when there is no signal, teletext, program guide, built-in radio, digital noise reduction, 2 tuners, 2 built-in speakers, power 20 W, 3 HDMI connectors, 1 USB port;
    • pros: affordable price, convenient menu;
    • cons: not very saturated colors, insensitive remote control, no Wi-Fi, poor sound.

    How to choose an LED TV

    Buying equipment for your home is a very important moment that needs to be approached with the utmost seriousness. It is important to go to stores with a good reputation that guarantee the quality of their products. You can either buy an LED TV or order it from an online store with delivery from Moscow or St. Petersburg to your home by mail. It is profitable to buy equipment before the holidays; during such periods, stores often have sales and promotions and offer excellent discounts. Tips for choosing an LED TV:

    1. Screen diagonal. This is one of the most important indicators. Many people think that bigger screen- so much the better. The optimal size should be calculated as follows: divide the estimated distance from the viewing position to the LED TV by three. The diagonal should be equal to the number you get.
    2. Screen resolution. The best for today, but also the most expensive, will be an Ultra HD LED TV.
    3. Image quality. This option should be selected based on personal preferences. In stores, as a rule, there are a lot of working TVs broadcasting the same file. Compare which one you like better.
    4. Screen covering. Glossy is more contrasty and brighter. However, it is not suitable for a room with a lot of sun, it will glare. Matte makes the image less clear, but is not shiny at all.
    5. Format. The most popular at the moment is 16:9. Suitable for both digital and satellite television. The second 4:3 format option is suitable for cable channels.
    6. Manufacturer. Buy only products from companies that have been on the market for a long time and have proven themselves well. Pay attention to reviews online.
    7. Settings. The more options you can adjust, the better. On some budget models it is impossible to even change the brightness of the image.
    8. Additional features. Modern LED TVs are equipped with many options that are not critical: voice control, wi-fi, built-in router. Assess your budget and decide which bells and whistles you need.
    9. A set of functional connectors. It's better to buy a TV that has HDMI ports, USB, for connecting other devices. Check whether the connectors are conveniently located and whether access to them will be difficult.

    Video

    It often happens that repairing an old TV becomes economically unfeasible, when the price of repairing it with the replacement of expensive elements can be comparable to the price of a new one in the store. For example, if the matrix (LCD panel) malfunctions, or if the main board is replaced in budget (inexpensive) models.

    Often in such cases, TV owners have questions: which TV is better, LCD or plasma, which brand is preferable, so that it is inexpensive and reliable, etc. ...
    It is quite understandable that the variety of brands and models of TV on sale in store windows makes many people think about their choice.
    Sellers may not always be objective due to their sales tasks or may not always be competent for other reasons beyond their control.

    It should be understood that modern LCD or OLED TVs and plasmas, unlike previous CRTs, are complex information display devices with a large number of functions and the ability to provide high image quality. Designed not only for receiving signals from broadcast or cable channels, but also for exchanging information with other complex digital high-tech devices or on the Internet.
    Technical features and characteristics of TVs may not always be clear to regular user, not puzzled by research in the field of modern achievements of the global television industry.
    Our recommendations may help you choose a TV that meets your requirements without overpaying for unnecessary functionality that you do not plan to use.

    Which brand of TV is better?

    Typically, TVs are more reliable if the brand is represented by a world-class electronics manufacturer, for example, Panasonic, Sony, Sharp, Samsung, LG, ... etc.
    TVs under domestic brands, for example, DNS, DEXP, ... or outdated ones, GoldStar, Aiwa, as well as twin brands - Supra, Fusion, JVC, ... have approximately the same origin - Russian assembly plants (mainly Kaliningrad) based on inexpensive Chinese components modules. The quality of such equipment can sometimes be somewhat questionable, but often such TVs work for several years without repairs. At the same time, televisions from reputable and reliable manufacturers may fail to work in the first year of service.
    When choosing modern technology when purchasing, the element of luck will play a significant role.
    You should still be somewhat careful about low-price TVs from little-known or outdated brands that are already and will appear on sale. The dubious origin of a TV may affect its reliability and maintainability.
    In such cases, it would be a good idea to more thoroughly familiarize yourself with the history of the brand and visit its official website. If you only find the address in the contact information email, especially from a free mail server, and the site domain is registered to a private person - it makes sense to think about it.

    TV life

    The service life indicated on the nameplate or in the accompanying documents is established by the manufacturer and obliges him to provide for the possibility and safety of operating the device during the specified period.
    If the period is not specified by the manufacturer, the default is 10 years, based on Article 6 of the Law on the Protection of Consumer Rights for Durable Goods.
    By specifying a shorter service life, the manufacturer limits its liability, reducing the period of its obligations to the consumer in accordance with its real capabilities.

    Here are two quotes from the Consumer Protection Law that will clarify the situation.

    Quote from Article 5, paragraph 2 of the Law of the Russian Federation:

    The manufacturer (performer) is obliged to establish the service life of durable goods, including components (parts, assemblies, assemblies), which after a certain period may pose a danger to the life and health of the consumer, cause harm to his property or the environment.

    Quote from Article 6 of the Law of the Russian Federation:

    The manufacturer is obliged to ensure that the product can be used during its service life. For this purpose, the manufacturer ensures repair and maintenance of the product, as well as production and supply to trade and repair organizations in the volume and range of spare parts necessary for repair and maintenance during the production period of the product and after its discontinuation during the service life of the product, and in the absence of such a period within ten years from the date of delivery of the goods to the consumer.

    The TV is recognized as a durable good on the basis of Decree of the Government of the Russian Federation dated June 16, 1997 No. 720

    On approval of the list of durable goods that, after a certain period, may pose a danger to the life and health of the consumer, cause harm to their property or the environment and for which the manufacturer is obliged to set a service life, and a list of goods that, after expiration of the expiration date, are considered unsuitable for use as intended.

    The actual service life of the TV has a very indirect relation to this, and may be limited by the economic inexpediency of repair, for example, in the event of a defect in the picture tube, LCD matrix or plasma panel.

    Let us briefly consider the features of the device and practical experience in operating televisions of the present century.

    CRT, LCD or Plasma? OLED or QLED?

    CRT(CRT) - televisions with a picture tube - the good old “boxes” that have served us for many years faithfully since ancient times, from black-and-white tubes to modern semiconductor color ones, which can still be in use today.
    The main advantages are relatively good image quality, reliability, and maintainability.
    Disadvantages - large dimensions and weight, low screen resolution, 50 Hz flicker, minimal number of functions and capabilities.
    In recent years they have rarely been found on sale. In many regions they have practically disappeared from store windows.

    LCD(LCD) - Liquid crystal televisions.
    Despite their external similarity to plasma TVs, LCD TVs are practical and maintainable. They have low power consumption and lighter weight.
    The image is formed by dynamic filtering of the light flux from the backlight.
    The crystals are applied to the glass and their mobility and position are controlled by electric current, similar to the principle of blinds. If they are all open we can see white screen— a reflector illuminated evenly through diffusers inside over all areas of the panel.
    If we rotate and close all the pixels, we will see a black screen.
    Pixels in dynamics are controlled by electrical impulses horizontally (rows) and vertically (columns) using the gating method.
    Among the shortcomings characteristic of to a greater extent for inexpensive models, one can note a limited viewing angle and some delay in dynamic scenes, which is determined by the parameter - response time, which is largely due to the mechanical capabilities of crystal mobility.

    LED— Modern versions of LCD TVs, the display of which is backlit with bright light-emitting diodes (LED), unlike earlier models backlit with fluorescent lamps. It is for this reason that modern TV models may be marked LED.
    Visually, LED TVs differ from conventional LCD TVs in their thin and light body.
    Currently, two options for such illumination are practiced:
    1. Edge LED— in this case, the LEDs are located at the edges of the screen (top, bottom or side) and shine into the end of the glass. Light losses are compensated by reflectors, and uniform illumination of the screen is ensured by the use of diffusers.
    2. Direct LED— LEDs are located behind the glass of the screen and distributed over the entire area. The use of a reflector and diffusers compensates for losses and realizes the effect of a uniform glow of the screen in all areas.

    Plasma TVs are similar in appearance to LCDs, but have a completely different principle of image formation on the display matrix.
    Unlike liquid crystal pixels, which are not a light source, but only break the light flux, plasma panel pixels are microscopic gas-discharge light bulbs. The principle of plasma discharge under the influence of electric current is used. The advantages of plasma in comparison with LCD can be considered higher contrast, unlimited viewing angle and lack of dynamic distortion.
    Disadvantages include high power consumption and limited pixel life.
    Plasma TVs are more complex and expensive to repair, which can have a significant impact during the post-warranty period.
    Externally, plasma displays can usually be distinguished from LCDs if you take a closer look at the surface of the screen. In most cases, plasma is hard glass, on the inside of which pixels with a phosphor are visible, like in CRT televisions. And the LCD screen is always tinted, usually with an anti-reflective coating, usually on the outside.

    OLED TVs - developed and manufactured by LG.

    Technical feature - no liquid crystals or backlight. LEDs (OLED - Organic Light Emitting Diode) in triads ( three colors) are applied to the surface of the glass, and their brightness is controlled by pulses electric current, switched horizontally and vertically.
    The principle of image formation is similar to plasma panels, only instead of gas-discharge plasma pixels, organic LEDs are used, which gives a significant advantage in power consumption and switching. In essence, this is a breakthrough in TV technology.
    The advantages are undeniable - unlimited viewing angle, high brightness with minimal consumption, perfect black color, maximum (unlimited) contrast.
    This contrast is due to the absence of any backlight and residual pixel glow. Then, for any brightness indicator, we obtain its ratio max/min to total zero- infinity.
    The disadvantages, in addition to the high price, will be revealed by practice of use as they are put into operation en masse.

    The manufacturer claims fairly high brightness and contrast characteristics that are competitive with OLED.
    In reality, comparative analysis data is not published anywhere, and it is only possible to evaluate the quality of these fundamentally different technologies subjectively—by eye.

    TV specifications

    Basic technical parameters TVs that determine image quality and may be important to the user - screen diagonal, screen resolution, brightness, contrast, response time, viewing angle. Typically, this data is written on price tags in stores, in passports or advertising brochures, which can be found in a wide variety on the Internet for all brands and models of TVs.

    Diagonal screen size In inches, manufacturers indicate the TV model, usually the first two digits of the model number. This refers to size as the distance, for example, from the bottom left edge of the screen to the top right.
    One inch is equal to 2.55 cm. For example, 40" is 102 cm.

    Screen resolution is important parameter when watching programs in high quality HDTV.
    Already many satellite channels, including NTV+ and Tricolor, broadcast HDTV in the 1080i standard, and most HD video recordings are organized in the 1080p standard, therefore, the TV screen resolution of 1920x1080 (Full HD) can be considered optimal for these purposes today.
    For viewing regular (non-digital) terrestrial television, resolution does not matter.
    Details can be read on the HD resolution and video signal resolution standards page.

    Response time due to the inertia of liquid crystals and can be noticeable in the form of trailing trails following fast moving image objects.
    In modern LCD TVs, this parameter is mentioned less and less due to the improvement of technologies that allow dynamic distortion to be minimized.
    If in the first LCD models the response time was tens of milliseconds (ms), then in modern TV matrix manufacturers managed to reduce it to units of ms.
    It is generally accepted that with a response of 2-4 ms, delays in the image become almost invisible to the eye and response times of this level are often not indicated at all in the main characteristics of the TV.

    Viewing angle TV can be significantly limited by the device of liquid crystals in the display matrix.
    This drawback is especially noticeable on inexpensive small-diagonal LCD TVs. You can see how the image quality deteriorates if you look at the screen from above or below (vertical viewing angle).
    When viewed from the sides (horizontal viewing angle), distortion is less noticeable.
    The parameters usually indicate the horizontal viewing angle. Or both angles, for example, 170/160 - horizontal and vertical angles, respectively.

    Brightness on modern LCD TVs it is usually determined within the range of 200 - 500 cd/m2 and characterizes the maximum glow of the white areas of the image. It is determined by the peculiarities of the matrix design and the organization of the internal display backlight.
    On some TVs, this parameter can be adjusted in the menu by adjusting the intensity of the backlight, which may be important for viewing during the day when exposed to direct sunlight.

    Contrast, as the ratio of white and black colors, it would seem simple to evaluate - the more, the better.
    But this parameter may not always be objective, because at present there is no single standard for measuring contrast, and the multi-thousand ratios declared by manufacturers often cause distrust.
    In addition, the actual image contrast depends on the settings in the menu for the appropriate user settings (brightness, contrast).
    Contrast in LCD TVs technically characterizes the ability of liquid crystals in the matrix to qualitatively block the passage of the light flux.
    Visually and somewhat subjectively, this quality can be assessed as follows: with zero brightness and contrast settings, the screen glow should ideally be minimal, close to black.
    Many modern models feature dynamic contrast control. Then the parameter indicates, for example, MEGA DCR (Dynamic Contrast Ratio).
    In most versions, this function automatically changes the brightness of the backlight depending on the brightness of the scene.

    Smart TV

    Smart TV - Smart TV.

    How to choose a TV

    A prerequisite for this category of TV is the ability to connect it to the Internet via Wi-Fi or network connection LAN
    Network navigation can be done using widgets or a browser.
    Video files can be viewed online or offline using a video player software.
    Modern TVs have the ability to connect a webcam and communicate on Skype and social networks.
    The TV can be controlled by remote control, voice, or gestures.
    The use of operating systems and deeper integration with computer technologies are being implemented. Currently, Android OS is the most popular on TVs.
    Content can be exchanged with other devices using built-in tools wireless communication Miracast (technology Wi-Fi Direct).
    The functionality of Smart TV must be clarified for each model individually.

    3D TVs

    Currently, two technologies for transmitting volumetric images are popular: active and passive.

    Active, or in other words - shutter, is implemented by alternating the image on the screen for each eye in different times with a fairly high switching speed.
    This option uses shutter glasses that block the transmission of the image to each eye in turn.
    The coating of the glasses is made using liquid crystals, which are controlled synchronously with the change of image.

    In passive technology, two images for each eye are transmitted simultaneously in adjacent lines and with different polarizations.
    For viewing, polarized glasses are used, the lenses of which are covered with a film that can transmit light according to its polarization. One eye sees odd lines, the other eye sees even lines.
    Preferences in choosing one technology or another are individual.
    Passive is simpler and more reliable, but in this option there is noticeably half the number of lines for each eye and some loss in brightness may be noticeable due to the presence of a polarizing film on the screen.
    The active one more accurately implements the stereo effect, but can limit the viewing angle and to a certain extent depends on the quality of the glasses and the synchronization of their switching via the infrared port.
    There is an opinion that when viewing for a long time, the eyes may become “tired” from the work of shutter glasses.

    Thank you for your attention!

    Choosing the right TV

    Step-by-step instructions on how to choose a TV when buying. LED or OLED, what diagonal, screen resolution and other parameters that affect the price and image quality. What additional functions do a modern television receiver have?

    Which one is better to choose?

    Over the past ten years, television technology has developed at a rapid pace and the tips that worked five years ago are no longer suitable for everyone today. The displays of television receivers, the set of additional functions, and the approach to creating a high-quality image have changed.

    The development of television technology has led to the fact that in 2018, only two technologies for creating displays are widespread on the market. These are LCD (LCD) matrices and new, expensive OLED screens.

    LED TVs are the same LCDs only with the matrix backlit by LEDs, which in English have the abbreviation LED. After all, for a liquid crystal display (LCD) to work, it needs a backlight. Previously, a fluorescent lamp was used, but now LEDs are used.

    OLED matrices consist of organic light-emitting diodes, which turn on when an image is formed on the screen and go out as the picture goes black. And LCD matrices consist of a layer of liquid crystals that block the path of light from the backlight. These details are needed to explain the TV with which screen is better to choose.

    CRTs and plasma panels, common in past years, have already left the market. The creation of such screens has become unprofitable. Therefore, they are not considered when choosing a TV.

    Selecting a TV

    Modern TVs operate on an LCD matrix, and only the flagship segment of each company has OLED screens. The peculiarity of both TV technologies is the small thickness of the body (several centimeters) and a flat screen. This design allows television receivers to be hung on the wall or installed in places where there is little space.

    Screen technology

    Which display technology to choose?

    From the point of view of experts, OLED TVs are better in image quality.

    For image quality, contrast, black level and color gamut with color uniformity are important.

    In terms of black level and contrast, OLED technology is ahead due to its design features. The backlight of LCD screens will not allow them to create a completely black color in the image. And for OLED you only need to turn off the diodes.

    In terms of screen illumination uniformity and color gamut, LCD also loses.

    Modern technologies for creating LED screens improve the quality of these parameters for liquid crystal matrices. Backlighting based on quantum dots, etc. is being introduced. With this, the cost of the device also increases, so that the price of such LED TVs is already comparable to younger OLED models.

    Advice! If you have enough money, then choose an OLED TV. But LED TVs from the older models in the range of each company deserve attention.

    But it’s worth saying that the price of a TV is greatly influenced by the size of the screen diagonal, and not just by the display technology.

    Which diagonal to choose

    We decide on the screen diagonal. Since all modern television receivers are flat panel with a body thickness of several centimeters, the size of the television is almost equal to the diagonal of the screen.

    The diagonal is measured in inches, and this value can be found in the markings of the TV itself or on the packaging. In the name of the TV receiver model, these are the first two digits, which indicate the number of inches in the diagonal.

    Knowing the screen diagonal, you can calculate the size of the entire TV in order to know exactly how much space will be required when installing it at home. You just need to add a few centimeters on the sides, and for some devices even millimeters.

    Learn more about screen diagonal size, here you will learn how to convert inches to centimeters and other information related to diagonal.

    Advice! It is believed that you need to choose as large a TV screen diagonal as your budget allows.

    After watching movies on TV several times large size, you won't want to go to a smaller screen. Often a diagonal of 32 to 55 inches is chosen for a home.

    When choosing the diagonal of the display, you can already calculate the distance from which you will watch the TV. This distance is affected by both the diagonal and resolution of the TV display.

    Display resolution

    The resolution of the TV screen shows how many dots, they are called pixels, are involved in the formation of the image on the screen.

    The more such pixels, the clearer the image. When comparing images with different resolutions, you will immediately see the difference.

    Standard TV screen resolution range:

    • HD Ready (1366×768)
    • Full HD (1920x1080)
    • Ultra HD 4K (3840x2160)

    Today, TV manufacturers offer television receivers with 4K (Ultra HD) resolution displays if the diagonal size is greater than 40 inches. And this is almost 70–80% of all models for each company.

    The Full HD standard was the most popular for television equipment three years ago. But today this resolution is found in models from 24 to 55 inches of the youngest series. Such television receivers are much cheaper than older series with 4K resolution.

    HD Ready is found only in models of the lowest series with a screen diagonal of up to 24 inches. These are the simplest and cheapest TVs.

    We don't have much 4K content yet, especially on broadcast television. But all modern films are released in high definition. There are also online channels that broadcast videos in Ultra HD resolution, for example, YouTube.

    Advice! If you are choosing the main TV for the whole family, then it is better to take a device with 4K resolution. When this is the second TV in the house, then Full HD resolution is also suitable. Well, if you choose a TV for the kitchen, cottage or other room as just an addition, then HD Ready is also suitable.

    Image quality

    How to choose a TV based on the quality picture on the screen? The most important thing on a TV is the picture on the screen. The television receiver must reproduce it without interference or distortion. What shortcomings may modern TVs have in terms of image quality?

    The very first thing you need to check is the presence of dead pixels. As mentioned above, a picture is formed from pixels.

    A pixel is a separate point on the screen, consisting of three subpixels, each with its own color (blue, red, green). Using a combination of these colors, you can achieve a pixel glow in any color. Well, this is all science, but we need to know that a broken pixel can be noticeable on the screen when viewing.

    Find dead pixels needed when filling the screen image with one of the colors, usually using black, white, red, blue and green.

    Features of LED TV: how to choose the right model

    In a single-color image, we look for points of a different color at close range. If you find such points already at home, the store may not accept the TV back.

    You either need to find these one-color fills yourself and take them with you to the store on a flash drive, or the TV menu may already have such a built-in function.

    The second thing you can check from the image is the overall impression of the video quality. Include for example: terrestrial television, then the video in high resolution. Look at the naturalness of the reproduced color. The unnaturalness is especially clearly visible in the color of human skin, green grass, blue sky, etc.

    Pay attention to fast-paced videos, such as sports racing. There should be no trails behind the objects in the video.

    You can additionally adjust the brightness, contrast, and color rendition on the television receiver. You should be able to easily find a comfortable viewing mode (settings). There should be, albeit a small, margin of brightness and contrast.

    TV sound

    Select the sound on the TV. Modern television receivers come with a thin body and it is difficult to fit a high-quality sound system into such a volume. The older series (7–9) from each company may still have an expensive and high-quality built-in sound system, but not all of them. But the younger series come with inexpensive speakers. Such speakers, of course, are quite sufficient for watching broadcasts, and they are definitely better than those that were on CRT television receivers. But to watch movies and concerts, experts advise buying a home theater system.

    And yet, if you plan to use a built-in sound system, then to check it you can increase the volume to ¾ of the maximum and check for quality. At such a volume there should be no vibrations of the case, extraneous creaks or distortions.

    Smart TV and 3D

    Additional features.

    An important additional functionality of modern TVs is the Smart TV system.

    This functionality will help connect home multimedia devices into single network. This will make it much easier to watch and listen to videos, photos and music on your TV. But this is just for convenience, but what is useful about adding smart TV is accessing the Internet and searching for video materials there. To connect to the Internet, the TV uses a connector under network cable RJ-45 or built-in Wi-Fi module. In any case, install a router connected to the Internet in your home.

    We read about the Smart TV functions that are included in this package.

    Every year manufacturers update their Smart systems TV, and today they refer to it by the name of the operating system used on the TV. It is the operating system that serves to provide normal operation smart tv For example:

    • Samsung uses the Tizen operating system,
    • Sony and Philips use Android TV,
    • LG - WebOS,
    • Panasonic works with its own development (previously Firefox was used).

    Another additional feature on TVs is 3D. Viewing three-dimensional images on televisions has not become widespread. If three years ago every company tried to introduce 3D into as many more models, then in 2018 it’s hard to find a TV with 3D. Many companies have completely abandoned 3D, while others have only one or two models that support the surround television function. The 3D format has not become popular on small television displays; it is used successfully only in cinemas on large screens.

    The presence of a curved screen can be attributed to additional functions, or rather features. As of 2018, there are still companies producing TVs with such displays. Here, whoever likes it, choose it. We can say that the company is gradually abandoning curved screens.

    HDR and other features

    The characteristics of the TV that affect the price include the model central processor, Wi-Fi module model, brightness level in “nits”, presence of HEVC and VP9-Profile2 decoders, used to receive video from the Internet.

    For LED models, the backlight is also divided into Edge or Direct. With Edge, the LEDs are located around the perimeter of the matrix, and with Direct, they are evenly distributed across the entire plane of the screen. Direct is considered better than Edge, it has more uniform illumination, and Direct can also better organize a local dimming system that is needed for HDR.

    But the main characteristic in recent years, which seriously affects the price, is the extended dynamic range HDR.

    It is for normal operation of HDR that high brightness in “nits” is needed, good processor, HEVC and VP9-Profile2 decoders because they handle HDR video.

    Extended dynamic range allows you to see more shades in the image in darkened or lightened areas, the image turns out more saturated, richer. HDR really improves picture quality. And although the content from HDR support It’s still not enough, if your budget allows you to buy a TV with HDR support, then buy it.

    In the TV specifications, HDR is designated as Dolby Vision, HDR10, HLG, HDR10+. These are all types of HDR.

    Select LED matrix

    If you choose an LED matrix, then the choice is between IPS with large viewing angles and VA with high contrast. This is a brief description of the type of LCD matrix. Each of these two types of matrices, with the development of technology, received various additions to improve the quality of characteristics. But the main disadvantages and advantages remain the same.

    For IPS matrices characterized by large viewing angles, which is good. And the disadvantage, compared to VA, is worse level black and lower contrast, as well as worse illumination uniformity. Good contrast also gives excellent color rendition in VA.

    In expensive matrix options, these differences are not so noticeable. But for the lower series of television receivers, manufacturers use not the most advanced matrices, and then the shortcomings become visible.

    Additionally

    What was not mentioned above, but you need to know.

    1. Having chosen and bought a TV for yourself, do not forget to adjust it at home to suit your viewing conditions. In the store it works in a mode that is not suitable for home viewing. Care about quality input signal. For broadcast channels today, T2 already operates with digital channels, and cable networks broadcast packages of digitized channels.
    2. If you look at the contrast value, this value is indicated for dynamic contrast. Dynamic contrast varies depending on the backlight level, which is regulated by a local dimming system for LED matrices. And this value will not tell you anything about the true contrast of the matrix. Do not look at the dynamic contrast indicator, or at least do not form your opinion about the TV receiver based on its value. The higher the contrast value, the better.
    3. Another marketing point is the update frequency. There is a frame rate and a screen refresh rate. Matrix frame rate 50 Hz or 100 Hz. The higher this frequency, the better; it is usually not indicated in the characteristics of the television receiver. But the refresh rate of the image on the screen changes using software methods, there are technologies to increase this indicator. Each manufacturer calls the image refresh rate differently and measures it differently. Therefore, it is not correct to compare this indicator from individual manufacturers.

    How to choose an LED TV and not make a mistake with the choice

    Today, the Internet, the media and household appliance stores are full of inscriptions such as “LED TVs”. What is this? How to choose an LED TV? And why is this concept associated with the concept of an LCD TV? This association does not arise in vain, since LED is a new generation of LCD TVs.

    The main difference is LED (Light Emitting Diode) technology, which serves as the backlight of the liquid crystal display.

    Characteristics

    In the household appliances market today, consumers are provided with a huge selection of LED TVs and the characteristics, functions, and capabilities of each model are unique. However, despite this, there are common specific features of LED TV.

    And so, the display of the average LED TV has the ability to transmit images in 16:9 format and has a resolution of 1920x1080 pixels. and accordingly supports a resolution standard called Full HD. And, of course, it must be said that the backlight of the liquid crystal screen is carried out by LED matrix technology, while in previous LCDs this lighting was produced by electroluminescent lamps. If you still can’t decide on the type of TV, then read the article from the beginning on How to choose a TV for your home, and then continue reading.

    Due to compatibility with Full HD, on such blue screens you can fully enjoy high definition television, i.e. HDTV and impressive viewing of movies recorded on Blue-Ray discs. Progressive frame scanning on LED TVs provides exceptionally high-quality images.

    Advantages and disadvantages of LED TV

    Image transmission is worthy of special praise in such screens due to the order of magnitude improved contrast and color rendition. It is noteworthy that the viewing angle of the LED TV is almost 180°, and to be precise, it reaches 178°. You can connect game consoles, home theaters, computers, video and photo cameras to it, external media, flash drives, hard drives, mobile phones and much more.

    One of the big advantages is that most models of this TV support “AllShare” technology, which provides external connection of compatible digital devices without any wires. The only and main drawback of LED TVs is the gaps that are talked about so much. The fact is that with very dark images on the screen (in the area with a dark image), gaps appear, or with very bright and light images, certain areas have dark shades. But, judging by user reviews, this drawback is not so noticeable and important.

    Admiration from highest quality The image itself is overshadowed by this disadvantage of the LED TV. However, the USB ports of such models are often very fragile and weak, which necessitates the purchase of an additional USB extension cable to avoid rapid wear and tear of the USB ports.

    Making a choice between LED and LCD

    LED TV has a number of advantages over its predecessor and opponent, LCD TV. First of all (this is the main distinguishing feature) is LED technology. In traditional LCDs, the screen was backlit by a fluorescent lamp using a diffuser lens that was located behind the screen. They were the reason for obvious brightening in dark images in locations, usually at the edges of the screen.

    LED TVs use LED indicators.

    They can be located either on the back of the screen (mesh) or on the side of the TV. By the way, the location of the backlight on the side of the screen makes LED TVs ultra-thin. It is the LED system that makes it possible to dim the backlight when dark images are transmitted to the screen in the dark part, which minimizes the appearance of gaps on the screen.

    In addition, we note that the service life of LEDs significantly exceeds the service life of conventional LCD lamps. Another big advantage is the energy saving of such TVs. Compared to LCD, LED TVs consume 40-45% less electricity. The improved image quality and versatility cannot be compared - everything is clear here.

    How not to be deceived and make the right choice

    When buying an LED TV, you need to be careful and attentive, since in appearance there is practically no way to distinguish between regular LCD and LED TVs, and an LCD may well be sold to a person who does not understand the issue, passing it off as LED. In such cases, you should carefully read the attached TV documentation.

    Another useful advice– When choosing an LED TV, try to view different images: from extremely bright to deeply dark. The fact is that minor gaps on different LED screens, even of the same model, are different. Even the intensity of their manifestation varies. Choose the most best option for yourself.

    Conclusions

    As a conclusion, we note that conventional LCD TVs are far behind LED TVs, both in image quality and in functionality, energy saving, service life and other technical characteristics.

    TV is the most popular household appliance. It exists in almost every family, and even if at the moment it is not there, then it is probably in the plans to buy. However, buyers are always faced with the question of which model to choose, what is better, and how not to make a mistake? After all, on the shelves in stores there is a huge variety different options, and even types of TVs - TFT, plasma, LCD, LED and so on. There are so many different names and abbreviations that you can simply get confused. This article will talk about what an LED TV is.

    Many buyers get lost in the selection process, seeing the large names LED, IPS, TN+Film, and so on. However, this is all just a commercial move. So, to understand what LED is, you should disassemble the device and operating principle of an LCD TV.

    1. LCD matrix design

    So, what is a liquid crystal matrix? The technology of its operation is the use of a special substance called liquid crystals. The substance received its name due to its unique properties. It simultaneously has optical properties similar to crystals, but is also liquid.

    Another feature is that when this substance is exposed to electricity, the liquid crystal molecules change their position, thereby changing the refraction of light. Thus, with the help of electricity, it is possible to control polarization - the refraction of the visible spectrum of light radiation.

    As you probably already guessed, the technology of the LCD matrix includes the need for a source of artificial light, the radiation of which will pass through the molecules of liquid crystals. The downside of the first TFT TVs is that they used fluorescent lamps. However, they have relatively large sizes and not bright enough radiation.

    1.1. LCD backlight

    So we get to the question of what LCD TVs are. These are ordinary TVs with LCD matrices, but they are used for backlighting. new technology LED. As you may have guessed, this is an abbreviation that literally means the following – Lite-emitting diode. What the Russian translation says is a light-emitting diode.

    Thus, it becomes clear that the answer to the question, what are LED LCD TVs - these are ordinary TVs with liquid crystal matrices that have LED backlighting.

    1.2. Advantages of LED backlighting

    Now you know that the abbreviation LED only means backlight technology, which does not affect the screen resolution. Of course, thanks to LEDs, the brightness and contrast of the image have significantly increased. This, in turn, had a positive effect on the accuracy of the picture.

    In addition, LEDs consume much less energy, but at the same time emit significantly brighter light. This makes LED TVs less consuming. Also, LEDs are smaller in size than fluorescent lamps, which allows them to be installed both along the edge of the matrix (around the entire perimeter) and on the back side (rear placement). It is worth noting that this technology backlighting made it possible to achieve more uniform illumination of the screen, which means better image quality - clearer and deeper colors.

    2. Is it possible to use an LCD LED TV as a PC monitor?

    Many buyers, when choosing LCD TVs, ask the question: is it possible to use an LCD LED TV instead of a monitor? It is difficult to answer this question, since each model has unique characteristics. Only taking into account all the capabilities and indicators of a particular model can we say whether it can be used as a monitor or not.

    It is worth noting that modern technologies make it possible to make inexpensive, but at the same time fairly high-quality matrices with many capabilities. Every modern LCD LED TV can be connected to a computer and used instead of a monitor. However, not every model will produce equally good image quality and accuracy.

    The fact is that liquid crystal matrices can have different resolutions. In order to use a TV instead of a monitor, it must have a high resolution (1920x1080 - Full HD). But such models have a fairly high cost. Of course, a regular screen with HD resolution (1366x768) is also quite suitable. It is worth considering that the picture will be slightly stretched.

    Of course, if you use a TV instead of a monitor to watch movies, you can buy any model, since in the vast majority of cases movies have low resolution (HD - 1366x768). It should be understood that the higher the resolution, the better the picture quality. Therefore, when choosing a screen, you need to take into account the characteristics of LCD LED TVs and choose them depending on your requirements.

    As a rule, any modern model has various connectors for connecting various equipment, such as:

    • DVD player;
    • Satellite receiver;
    • Audio system (home theaters, etc.);
    • Memory storage devices (flash drives, mobile hard drives, etc.);
    • Computers, laptops, tablets and smartphones, and much more.

    All this allows you to connect your laptop to your TV at any time and watch movies or photos. LCD LED TV technology allows you to display even small details, but it is worth considering that the larger the diagonal, the further you should be located from the screen.

    3. How to choose an LED-backlit LCD screen

    Everyone understands that when choosing TVs, you first need to look at the characteristics of the device. Of course, the image quality is mainly affected by the matrix, more precisely technology, according to which it was made. Today there are several types of matrices, but two types predominate in the domestic market:

    • TN+Film.

    Both of them have their advantages and disadvantages. But they are insignificant, so if you buy a screen to watch programs and movies, then any option will suit you.

    In addition, the backlight technology affects the image quality. Now, knowing what an LED LCD TV means, it is not difficult to make a choice, since LED backlighting has undeniable advantages. This means that LED-backlit matrices have best characteristics than conventional models with fluorescent lamps.

    You need to understand that not all LED-backlit LCD matrices have the same parameters. They may also differ from each other. Therefore, when choosing, you should look at how the LEDs are installed and whether their glow is visible against a dark background.

    4. Advantages of Samsung LED TVs: Video

    5. Advantages of LCD TVs with LED backlighting

    Now you know what LED TVs are and their characteristics. Their obvious advantages can be highlighted, the list of which includes the following:

    • They can be used instead of a monitor;
    • Deeper and more natural colors;
    • High level of color saturation;
    • High brightness and contrast;
    • Higher image clarity;
    • Low power consumption.

    With all these advantages, LEDs have a low cost. This means that a good LCD TV with LED backlight can be purchased at a lower cost. Moreover, it can be used instead of a monitor.

    Now you know the answer to the question, LED TV, what it is, and how to choose it. Remember that technology does not stand still, new models of more modern and high-quality TVs appear every year, so in order to make right choice When purchasing a device, you should clarify all the details with the seller.

    Today, the variety of television equipment is very high. All of them differ in the principle of image formation, the technology of its illumination, as well as the presence of additional technological delights. Despite this, the choice in favor of one type of TV or another is becoming easier to make, as pass-through types such as plasma and projection are becoming a thing of the past. LCD TV began to occupy a dominant position in the market, although just a few years ago the debate around which is better - LCD or plasma, was very heated, but with the development of liquid crystal technology, the operating principle of which is based on the polarization of the light flux, the debate came to naught, and Plasma models went into oblivion, giving way to LCD TVs.
    LED or LCD?

    Choose a good option

    Often, when we go to a store, we choose a device primarily by size and price. But there are many other factors that also need to be taken into account.

    So let's figure out which option to choose - led or lcd, what possibilities are hidden behind the abbreviation, led TVs - what does this actually mean, why have they become so popular lately.

    The essence of this question is to find out which TV is better, but this approach to comparison is fundamentally wrong, since LED denotes the matrix backlight technology, and LCD is, in fact, the matrix itself, inside which the image is formed. A similar, erroneous attempt to compare is that an inexperienced buyer is trying to understand what is better - LCD or ice.

    Partially understanding the difference will help to understand the terminology. The abbreviation LCD comes from the English Liquid-Crystal Display, which means “liquid crystal display”, and LED (light emitting diode) is translated as “light emitting diode”. Therefore, it is inappropriate to compare a screen and a light bulb, especially since the concepts of lcd and led are related, do not contradict each other and coexist perfectly in most modern models. Moreover, LCD matrices with backlighting other than LED are becoming increasingly rare.

    Such a false comparison in the minds of ordinary people did not arise by chance - it is the result of the planting of a marketing idea. It was she who promoted LED as a fundamentally different type of technology, leaving behind the scenes that, in fact, it is only a fundamentally different type of backlight, which replaced the fluorescent backlight in the same LCD TV.

    Undeniable advantages allow ice lighting to differ from fluorescent lighting, otherwise it would not have become so widespread. After all, LED TV backlights have not only supplanted fluorescent ones, they have practically driven them out of the market, not least because LEDs are cheaper to produce.

    Another undeniable advantage in receiving the title “best” is environmental friendliness: LED TVs, or rather LEDs, do not contain mercury, which fluorescent lamps cannot boast of.

    A very strong argument in favor of purchasing LED equipment is the presence of much higher performance characteristics compared to models with the old type of backlighting. One of the differences is that LEDs burn longer and do not dim during operation. As a result, such a TV works without loss of image quality. And the service life of the device is a significant factor in the choice.

    Important nuances when choosing a TV

    Separately, you need to dwell on how to choose a LED TV. Despite the apparent obviousness and simplicity of choosing the type of device, you need to understand that LEDs are different, and in order to choose the right one, it doesn’t hurt to understand what qualitative differences characterize such TVs and how they are expressed.

    The main factors that you should pay attention to when choosing an LCD TV are:

    1. The principle of screen illumination with LEDs

    This is directly related to how the technology is implemented. It is impossible not to mention how LCD TVs differ from fundamentally different technology - OLED (organic light-emitting diodes).

    The difference between models with OLED displays is that the LEDs here do not illuminate the matrix with white light, thereby illuminating the image, but rather form the image themselves. The matrix of such a display consists of many LEDs, each of which emits the desired color of a certain intensity. This fundamentally affects not only the quality of the picture, which is a level higher here, but also the cost, which in turn hinders the mass distribution of this technology. In addition, OLED displays have a much shorter service life, approximately 2-3 years, which is also a limiting factor for its distribution. At the same time, the service life of LED TVs is about seven years.

    At the moment, OLED technology is a distinctive feature of the premium segment of TVs, and here each buyer, based on his budget, decides which one to get - LED or OLED.

    1. Illumination Uniformity

    Depends on the number of LEDs.
    Of course, you won’t be able to count them, but before purchasing you should pay attention to the degree of uniformity of the screen’s glow. It is advisable to check this not on beautiful picture high resolution, and on solid colors - then it will be easier to see highlights. However, this practically never happens on TVs from famous brands, even in the budget segment; it is mainly the manufacturers of Chinese brands who are guilty of this.

    High-price TVs use so-called carpet backlighting, which is characterized by the fact that the LEDs are located immediately behind the display and are evenly and fairly densely distributed over its entire area. In addition to uniformity, this method also allows you to control the brightness of the glow in a particular area on the screen. In practice, this allows you to reduce the intensity of the glow in those areas of the screen where you want to achieve deeper blacks. It must be said that this is a very uncommon technology, and not all brands implement this approach well. The most commonly used schemes are those in which LEDs are placed in two garlands, one each at the top and bottom of the display, or in several such garlands, symmetrically distributed directly behind the screen.

    1. Glow brightness

    This determines how well the screen will be visible in daylight. Many people probably know what it’s like to watch a movie or program when the entire picture is illuminated by the sun. Therefore, it is worth paying attention to this point if you plan to use the TV in brightly lit rooms, or if it will be located opposite a window. In any case, the brightness, if it is excessive, can be reduced.
    Guided by these points, you will already know exactly how to choose the right LED TV.

    SMART TV

    It is also worth mentioning such a concept as smart, with which the era of smart television began.

    It does not relate to quality and does not affect the picture, however, a buyer who makes a choice of an LED TV inevitably encounters this term when he comes to the store to make a purchase, and therefore it is better to be aware of whether it is necessary to spend money on the purchase smart device, or you can do without it. In fact, a smart TV contains an additional module that is used to access the Internet and only acts as a monitor.

    A smart TV is distinguished by the ability to access the Internet, provided that an Internet cable is connected to it. The result is a kind of symbiosis between TV and computer.

    In general, when buying a TV, you need to understand that watching television channels at home and watching a promotional video in a store are not the same thing. A TV can produce the best quality only if you watch TV channels in high definition or HD content.

    Thus, knowing how LCD differs from OLED and smart, you can consciously approach the choice of a TV with the required technical characteristics.

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