Into 21st century, backlight has achieved rapid development and 

gradually entered industrial stage. When it is compared to CCFL, 

LED has an obviously advantage on energy saving. As one of the 

most important fittings in liquid crystal products, LED backlight 

also achieved rapid development with new technology and new product

 released continuously. Particularly, the market share of LED 

 has increased gradually. Some products like laptop, display device and TV, which were used CCFL 

backlight, have been changed to LED backlight since 2008. 

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