Features of LED TVs with Edge and Direct backlighting

LED TVs have gained particular popularity among users due to their characteristics and quality. However, not everyone understands what a led TV is, how it differs from others and how this technology works. Therefore, today we decided to talk about the advantages and disadvantages of this technology, as well as answer other questions.

In television equipment, LED refers to a liquid crystal LCD television with backlit edge or direct type light emitting diodes. Older TVs used a cold cathode lamp backlight. Thanks to the new backlight technology, the image quality has improved, which means that the brightness, contrast, color depth and color reproduction itself have improved.

A large number of small individual LEDs are used to create such an edge-lit monitor. In this case, each of the diodes is responsible for the backlighting of a certain area of ​​the screen. This technology allows you to reduce the thickness of the TV. In addition, unlike the fluorescent lamps used in LSD TVs, the LEDs used for both direct and edge backlighting last much longer.

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Features of LED backlight

In fact, most of the parameters in ice TV depend on the quality used. It affects parameters such as:

  • Contrast;
  • Brightness;
  • Viewing angle;
  • Black level;
  • Color gamut;
  • Color rendering;
  • Response time;
  • Update frequency.

The increase in screen contrast has led to the emergence of such a thing as dynamic contrast. This means that the brightness of the glow of each of the diodes with direct backlighting is controlled separately from the rest of the sections. In this case, the static contrast does not change, since it depends on the display matrix.

In addition, a new local dimming technology is added to both direct and edge backlit LED TVs, providing local dimming that allows you to control groups of LEDs. This dimming method is quite popular, but it also has some drawbacks.

  1. The color is not uniform, so you may notice dark and bright spots where the backlight is not present or it is turned on very brightly.
  2. Fine details of the image disappear in dark areas.
  3. Colored halos appear at the junctions of contrasting colors.

However, do not worry, as they are not visible in the usual picture.

Types of ice backlights

The backlighting in such screens is divided into several main types:

  • Direct - blue, red and green diodes are evenly spaced from the back of the matrix, forming a screen. Direct technology achieves the most optimal color gamut and the best color reproduction. However, it should be noted that displays with direct technology consume more power and are thicker.
  • Edge - white LEDs along with a diffuser panel are located around the perimeter of the screen. Edge TVs are more energy efficient and thinner, but good local dimming is difficult to achieve. Edge-type backlighting is the most popular, especially on small diagonal TVs.

Composite LEDs

Direct lighting in TVs is different from classic RGB LED. Composite LEDs in three colors are being used to improve color gamut. However, the desired color gamut did not work out, as it was often too small. Therefore, on the basis of this technology, other light diodes have been invented, allowing to achieve the desired result. So, today quantum dots or GB-R LED and RB-G LED diodes are used in ice TV.

In the GB-R technology, blue and green LEDs are combined into one, covered with a red phosphor, and in RB-G, red and blue are combined, which is eventually covered with a green phosphor.

Disadvantages and advantages of LED TVs

Advantages

disadvantages

High contrast video High price
High definition and realism achieved through high response speed A small number of TV models with a small diagonal
Environmentally friendly due to low energy consumption, as well as the absence of mercury and harmful aerosols in the backlight of the edge type
Stylish TV appearance
Durability of LEDs
A large number of additional functions
Availability of 3D and Smart TV functions in some models

As a result, it can be noted that such TVs have a large number of advantages, and of the disadvantages, in fact, only a "biting" price.

How to choose an LED TV

There are several criteria for choosing a TV model:

  1. Screen resolution. The quality of the image will depend on it. The maximum resolution for these Ultra HD TVs. TVs with such a screen often have a Smart TV function, can support 3D and have a built-in multi-channel sound system.
  2. Fast response. The faster the picture on the screen changes, the better and more expressive the video will look.
  3. Sound. Its quality will depend on the number of speakers built into the TV.
  4. Viewing angle. Most modern TV models achieve a viewing angle of 178 degrees, both vertically and horizontally. By the way, it is worth noting that if the vertical viewing angle differs from the horizontal viewing angle, then the picture, depending on your location, may be distorted.

Also, do not forget the package bundle, as well as the operation of all functions.

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