The application of LED in backlight module has the advantage of saving electricity

Time:2018-08-11 Views:1499

The application of LED in backlight module has the advantage of saving electricity.

LED is applied to backlight module as the light source, instead of the traditional cold cathode fluorescent lamp (CCFL), which not only has the advantages of light power saving, small volume, long life, low voltage and fast start, but also has the concept of environmental protection.For laptops, depending on the processor and size, the LCD panel consumes about one-third of the power of the whole machine. Due to the low power consumption of LED, the current use time of NB with LED backlight can be extended by more than 1.5 hours.The thickness of LED light guide plate can be reduced from 2mm to 0.6mm(13.3in product), the thickness of the screen can be reduced, and the weight of the whole machine can be reduced.Currently, each CCFL contains about 2mg of mercury, and using LED as the light source can reduce the use of mercury.If you use RGB to mix three colors into white light, you can provide better color saturation, and the color will be more vivid.The LED can achieve the dynamic control of the region, and it can be switched off when part of the region is black, so as to improve the contrast between light and shade and save electricity.LED has a fast reaction speed. RGB tricolor LED is used with fast reaction liquid crystal, and Color Sequituonal can be used to omit the use of Color filter.

The luminous efficiency of LED is only 20 ~ 40lm/W, not as good as the 80lm/W of CCFL, and the high cost will be the biggest weakness of LED backlight module.Both a CCFL and a bright LED cost about $1.50 each, but the number of leds used far exceeds that of the CCFL.In addition, LED heat dissipation is not good, the fashion of large-size TV with heat dissipation base plate will be another item, while the attenuation speed of each LED is different, and the problem of color unevenness will occur in the long term.