HDTV平板液晶屏背光源的调光设计  

The Light Adjustment Design of HDTV LCD Screen Backlight

作　　者：郝少华[1] 叶邦彦[1] 

机构地区：[1]华南理工大学机械与汽车工程学院

出　　处：《微型电脑应用》2009年第12期35-37,77,共3页Microcomputer Applications

基　　金：国家863计划资助项目(2007AA04Z111)

摘　　要：在比较了LED和CCFL(冷阴极荧光管)光源的特点的基础上,选取LED作为HDTV平板液晶屏的背光源。分析了局部调光技术的原理,根据其要求,设计出合适的LED驱动电路和调光电路,使液晶屏获得了5000:1的较高的对比度,从而使HDTV清晰度得到提高。After comparing the characteristic of light of LED and Cold Cathode Fluorescent Lamp(CCFL),we choose LED as the backlight of HDTV tabulate LCD screen.By analyzing the technology of local light adjustment,this paper design an appropriate LED driver and light adjustment circuits according to request.As a result,LCD screen attain the contrast of 5000:1 and hence make HDTV get a higher definition.

关 键 词：LED 局部调光 驱动电路 高清晰度 

分 类 号：TN941.3[电子电信—信号与信息处理]