How Much Do You Know About TV Backlighting? The Difference Between The Advantages And Disadvantages Of Side-type/direct-type Backlight

LED backlights are divided into direct-lit and edge-lit types, each with advantages and disadvantages, and cost differences, but the price of terminal products is different from each other; due to the increasing popularity of ultra-thin TVs, the sales of edge-lit LED TVs are growing It will be faster and the price is more approachable. The direct-lit LED TV is popular with consumers who need high-end audio-visual equipment. When the direct-lit LED backlight LCD TV was first published, it was widely adopted by various manufacturers; the direct-lit type is to arrange the LED dies evenly behind the LCD panel as the light source, so that the backlight can be evenly transmitted to the entire screen, and the picture details are more Delicate and realistic.

How much do you know about TV backlighting? The difference between the advantages and disadvantages of side-type/direct-type backlight

Brands that use direct-lit LED backlights, such as: Sharp XS1 series LCD TVs, use more LED chips than edge-lit LED backlights. The advantage of direct-lit LED backlights is that they can set different backlight module power and responsibility areas. In theory, it is possible to control the brightness of each LED independently, but the wiring and design costs are not easy. In fact, multiple areas are set on the backlight of the screen, so that these areas can independently adjust the brightness... Large-size LCD TVs with integrated LED backlights require thousands of LED dies, and the cost is relatively high. Especially when the early LED TVs were just launched, RGB three-color LEDs were used to improve the color, so that the picture colors can be more vivid, and the cost is naturally high. Can be adjusted to a general level. The edge-lit LED backlight is to arrange the LED dies on the periphery of the LCD screen, and then match the light guide plate, so that when the LED backlight module emits light, the light emitted from the edge of the screen is transmitted to the central area of the screen through the light guide plate. , So that the overall amount of backlight, allowing the LCD screen to display pictures.

There are two advantages of edge-lit LED backlights. One is that it can use fewer LED dies, saving costs, and the other is that it can create a thinner and lighter body, so that the rear of the LED TV LCD panel does not need to be equipped with LEDs. The module is placed on the side, which can reduce the overall thickness of the screen, creating a thinner model than the direct-lit LED-backlit LCD TV.

The LCD TV with edge-lit LED backlight can be very thin. In terms of shortcomings, for edge-type LED TVs, when the bright area on the screen is adjusted to a dark area during the screen change process, the gray level of the adjacent screen area will be affected and reduced, resulting in a slight blur. If the edge-type LED backlight module is configured behind the LCD screen, the higher the density of the LED crystal grains, or the more areas for dimming in zones, the probability of blurring will be smaller. The advantage of edge-lit LED backlight technology is that it can build a relatively thin and light LED TV model, and the cost is relatively cheap; but the current edge-lit LED backlight has the disadvantage of poor picture uniformity.

Although the thickness of the edge-lit LED TV is thinner, the number of LED dies used is relatively small, and the light is sent to the screen through the light guide plate, which will cause the brightness of the surrounding edge of this kind of LED TV to be brighter than that of the screen. The center should be bright, the edge area of the screen will be hotter than the middle of the screen