LED backlights are divided into direct-lit and edge-lit types. Each has advantages and disadvantages and cost differences. However, the price of terminal products is different from each other. As ultra-thin TVs are becoming more and more popular, the sales growth of edge-lit LED TVs will be higher. Fast, the price is more approachable. The direct-lit LEDTV 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.
Brands that use direct-lit LED backlights, such as: Sharp XS1 series of effect crystal TVs, use more LED dies than rigid-light LED backlights. The advantage of direct-lit LED backlights is that they can set different backlight module rights. In theory, it is possible to control the brightness of each LED independently, but it is not easy to route and design costs. In fact, multiple areas are set in the backlight of the screen. Let these areas be able to adjust the brightness independently... a large-size LCD TV with direct-lit LED backlight requires thousands of LED dies, and the cost is relatively high. Especially when the early LEDTV examples were 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. However, in recent years, individual manufacturers have adopted cheaper white LEDs as backlight sources. It can now be adjusted to a general level. The edge-lit LED backlight is equipped with LED dies on the periphery of the LCD screen. Match the light guide plate. When letting the LED backlight module emit light. The light emitted from the edge of the screen is transmitted to the central area of the screen through the light guide plate. In this way, there is a backlight in the whole, which allows the LCD screen to display pictures.
There are two advantages of Chuangguang aLED backlight. One is that it can use fewer LED dies, saving costs, and the other is that it can build a thinner and lighter body, so that the rear of the LEDTV Senjing panel does not need to be equipped with an LED module , But placed on the side, can reduce the overall thickness of the screen, to create a thinner model than the direct-lit LED backlight LCD TV.
The LCD TV with edge-lit LED backlight can be very thin. In terms of disadvantages. In the process of changing the screen of an embedded LEDTV, when the bright area on the screen needs to be adjusted to the dark area. The gray level of the adjacent screen area will be affected and reduced. There is a slight molding phenomenon. · If the edge-type LED backlight module is equipped with a higher LED die density behind the LCD screen, or there are more areas for dimming, the probability of blurring will be smaller. The advantage of the omnidirectional LED backlight technology is that it can create a thinner and lighter LEDTV model, and the cost is relatively cheap; but the disadvantage of the current edge-lit LED backlight is that the picture uniformity is not good.
