Backlight system: guide to choice

  • By: Bhumika
  • Date: August 31, 2021
  • Time to read: 4 min.

One of the main doubts that afflicts a person who wants to buy a new television is the technology applied to the panel. This is certainly not the only perplexity, on the contrary, but it is one of the first. The screen in fact, is the medium that transmits any content, and you want to make sure that the quality corresponds to your needs.

To date we can say that there are three types of screens that characterize the world of televisions: LCD, LED and OLED. Each of these has specific peculiarities, with its own advantages and disadvantages. To choose the television that suits your needs, therefore, it is important that you know all three well.

LCD screens

LCD screens are the liquid crystal displays, also widely used for computer and smartphone screens. In essence, the screen is divided into “cells” containing crystals in the liquid state. This means that the molecules are free to move on to one another, managing to maintain the optical properties of the crystals.

However, when contact with electric current takes place, these particles are arranged in singular and complex structures. In this way, each molecule reflects light differently, transmitting a specific color to the screen. Although it may seem an obsolete technology, an LCD television is able to transmit very detailed images, thanks to the color adjustment of individual crystals.


The backlight system is carried out through lamps powered by cold cathode neon,low-costtechnology. The images reproduced are very bright and sharp, with an image stability that eliminates flickering.

However, there are some limitations that to date have made LCD screens go down a lower plane than LEDs and OLEDs. In the first analysis, the angle of the view is very small, due to the light beam that powers the technology. The contrast level is quite low, as the blacks do not appear dark and deep.

In addition, the particularly animated content (action movies or video games) appear slowed down, since they are made with very advanced graphics. The same problem occurs on screens that have dimensions greater than 32 inches. Finally, you may encounter the problem that some pixels are defective, a discomfort that has been overcome by the other two technologies.

LED screens

LED displays also feature a liquid crystal screen. However, there are some substantial differences with LCD displays, considered the precursors. In the first analysis, the backlight is done through LED bulbs, instead of neon lamps. In addition, these screens have bands of LEDs arranged alongthe sides , whose task is to backlight the entire screen.

Contrast levels are better than LCD screens, although blacks still don’t look completely perfect. The areas of the screen are divided in a way called “honeycomb”, thanks to which there is a reduction in light dispersion. The quality of the images, therefore, is still higher than LCDs, but not enough to be on the same level as OLEDs.


As for theangle of view,the field still remains slightly narrow, especially when compared to OLED screens. Another advantage lies in the thickness of the screen, which will look less than LCDs. Energy consumption is also reduced,as is the purchase price.

For the features that LED screens present, most people focus their attention on them. This is also due to a high production of this backlight system, supplied by all manufacturers. In essence, therefore, LEDs are an excellent middle ground between previous LCDs and OLEDs, considered high-end TVs.

OLED screens

OLED screens have nothing to start with LCD or LED ones. In this case, in fact, the display does not use a backlight system, but emits its own light. The meaning of OLED, thinking about it, is Organic Light Emitting Diode, which means nothing more than organic light-emitting diode. The process by which the pixels turn on or remain off is very simple.

In essence, the panels of this category consist of a very thin layer of organic material, which rests on a layer of glass or plastic. The latter is inserted between two other layers, called “transport”, to which the electric chargeis applied . The organic material is then stimulated by the current, starting to emit light.


As for the contrast levels then, we can say that OLED TVs offer unparalleled quality. In the dark scenes, in fact, the pixels remain off, highlighting the illuminated areas. However, one point should be stressed against these television stations. By bringing the contrast levels to the maximum, the display wears out much more quickly, reducing the duration of its life.

An additional advantage of OLED TVs is the perfection of image even during the most animated scenes, which remains lower than led ones. This is because, each scene is displayed until you move on to the next. The category of these televisions solves the problem of viewing angle, as it is possible to watch content even from very high angles.

As for the life ofthe television , OLED screens are still too recent to be compared with LCD or LED ones. Anyway, these last two technologies have proved to be very reliable over time. Finally, on the price range side, progress has been made, although the cost for an OLED television still remains very high.


After seeing all the pros and cons of the three backlight systems we can say you have all the credentials to be able to choose the one that is most right for you. As we said, each one has specific characteristics, which can be more or less suitable for your needs. In any case, we must emphasize that, for the value for money, LED televisions remain the best choice.

If, on the other hand, you want to focus on a very high quality,counting the high prices, OLEDs will only meet your needs. As for LCDs, however, these are more purchased to be placed in rather small rooms,due to the limitations seen previously.

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