At present, large-size LED backlight is a new trend in the development of the flat-panel TV industry. According to data from relevant foreign companies, the LED TV market is already very mature. Using high-brightness LED backlighting, the LED array can be dimmed or partially turned off on the backlight "string", thereby making the picture more vivid. Another benefit is the ability to completely turn off the LED locally, thereby reducing the problem of motion blur. The LED backlight module can overcome some shortcomings of the current backlight module using CCFL lamps.

Here is the list of the article:

l What is the composition of the backlight module?

l What are the advantages of the backlight module?

l How to achieve ultra-thin backlight module?

What is the composition of the backlight module?

The ultra-thin LED backlight module mainly includes: LED light bar, driver, light guide plate, upper frame, back plate, etc. The backlight source uses white light LED. The entire structure is based on the LCD TV display size as the standard, and then other components are dimensioned design. The first thing to consider is the design of the direction of the circuit, and to assemble from the overall structure and the relationship between all parts. As part of the structural theme of the backlight module, the back panel of the TV is related to the flatness of the entire backlight module. At the same time, the TV rear shell also links the middle frame, the front frame, and the light guide plate together. The quality of the light guide plate affects the function of the entire LED backlight module.

What are the advantages of the backlight module?

The advantages of LED backlight modules are:

①Wide color gamut, fast response time and long life, applied to LCD TV, can realize the ultra-thin design of the whole machine.

②No mercury, low power consumption, meeting the requirements of environmental protection and energy saving.

③Because the LED light source has better linearity, it can reduce the energy loss caused by the absorption of the reflector.

Therefore, it is welcomed by the industrial market and consumer market. In the future, in order to keep LCD TVs more competitive in the future market, it is necessary to develop and design new types of backlight modules. Among them, LED backlights with low power consumption, high brightness, and ultra-thin characteristics are the first choice for the next generation of LCD TV backlight modules.

How to achieve ultra-thin backlight module?

The design of increasing the light-emitting angle of the LED light can realize the ultra-thinness of the backlight module. Because the existing traditional light output angle is relatively small (120° Lambertian distribution), it is not suitable for ultra-thin direct-lit LED backlight. It can be considered to increase the light output angle of the traditional LED. In order to achieve this goal, the light emitted by the LED can be diverged to increase the light output angle of the lens. When the light emitted by the LED is on the lower side of the normal line, the refracted light will be deflected downward, that is, the light will diverge.

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