Comprehensive analysis of the edge-lit LED backlight advantages TFT Display Module

Edge-lit One is called side into one of the largest weakness is not local dimming. Since LED lamps are concentrated at the edge of the TV from the light guide plate must be uniform light output on the TV screen. Therefore, it is difficult to do adjust the brightness of an area of ​​the screen. The direct type, a local LED switch can be achieved through the LED driver chip, so local dimming on the obvious advantages. Therefore, a new binding and down and side-entry two technical merit the local dimming matrix backlight program came into being, and backlight manufacturers focus on the direction.mini lcd module
Now it seems that many regarded the backlight summarized as direct type backlight technology, referred to as matrix backlight.
The advantage of this technology should be said to focus on the benefits of both technologies and down and side-entry:
1, local dimming: had just begun in the early LED TV, when there are two kinds of the technology direct type and side-in. As side into one of the biggest weaknesses is not local dimming, LED lights focused on the edge of the TV, by the light guide plate light uniform output to the TV screen. Therefore, it is difficult to do adjust the brightness of an area of ​​the screen. The direct type, a local LED switch can be achieved through the LED driver chip, so local dimming on the obvious advantages. And as a combination of two technologies, matrix-type backlight can be done the same local dimming function controllable partition is completely determined by the LED driver. In early matrix product, compared to the current direct type, there will be more controllable partition.
2, thickness: thickness, is the Achilles' heel of the direct type backlight, Sharp uses LED + the lenslet significantly reduces the elimination of LED lights in the thickness, the thickness of the TV sets still much higher than the side guide optical thickness, the main two kinds of LED backlight technology, which is in the direct type completely defeated. It can be said that the matrix backlit perfect solution to this contradiction.20x2 oled
3, the contrast of the screen: expressive as the image quality is very important, relatively speaking, contrast LCD weaknesses. The LCD never been able to reverse the control switch 0,1, usually side into the contrast of the LCD even if the application dimming technology, but also in thousands of. Straight down light technology in the performance of a black screen when the LED is off, can significantly improve the contrast, LG claims that they can reach 700 million: 1 contrast.
4, energy: in the black part of the image, by turning off or reducing the LED current to achieve lower power consumption, but also an advantage of straight down the backlight, similarly, also has the same advantages as the matrix backlight.
Heat: a technical point as a side-in backlight, the matrix backlight LED large number of scattered backlight, instead of focusing on one side of the TV, so that the thermal design is relatively simple.