LED分区背光光扩散性能研究

发布时间：2018-04-13 02:19

本文选题：液晶显示器 + 区域动态调光技术　；参考：《光电工程》2014年07期

【摘要】：液晶显示器的区域动态调光技术中,各分区背光确定后,为了保证背光降低后的亮度和显示效果,需要对液晶像素进行精确补偿。本文采用低通滤波方法模拟LED背光源在背光模组中传播时的扩散过程,得到光扩散函数模板参数,进而得知各像素的实际背光亮度,据此对液晶像素进行精确补偿。在直下式LED分区背光液晶显示系统上,通过具体图像验证了该方法的准确性。该方法采用常见的测试设备,可操作性强,精度高。经验证,背光分区为32个时,32个分区的相对误差平均值为6.41%。在动态区域调光液晶电视样机中实现了本文的扩散方法,和没有调光的电视相比,节能率达到27.06%,画面无拖尾现象。
[Abstract]:In the area dynamic dimming technology of liquid crystal display (LCD), in order to ensure the brightness and display effect after the backlight is reduced, the LCD pixels need to be compensated accurately after the backlight is determined.In this paper, the low pass filter method is used to simulate the diffusion process of LED backlight when it propagates in the backlight module. The parameters of the optical diffusion function template are obtained, and then the actual backlight brightness of each pixel is obtained, according to which the LCD pixels are compensated accurately.The veracity of the method is verified by the concrete images on the LED backlight liquid crystal display system.This method adopts the common test equipment, which has strong maneuverability and high precision.It is verified that the average relative error of 32 backlight partitions is 6.41 when the backlight partition is 32.The diffusion method of this paper is realized in the dynamic region dimming LCD TV prototype. Compared with the TV without dimming, the energy saving rate is 27.06 and the picture has no trailing phenomenon.
【作者单位】：特种显示技术教育部重点实验室;特种显示技术国家工程实验室;现代显示技术省部共建国家重点实验室(合肥工业大学);合肥工业大学仪器科学与光电工程学院;合肥工业大学光电技术研究院;
【基金】：国家863高技术项目(2012AA011901) 安徽省2012科技计划资助项目(1206c0805007)
【分类号】：TN873.93

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