The Study of Luminance Parameter in Full Color LED Display
Full color LED video display systems are getting popular in recent years. However, there is different luminance in the same bright image due to environment temperature variation. The degrees of intensity deviation of red, green and blue color of LED change with environment temperature, the brightness of blue LED drifts slightly and the red LED seriously. This characteristic may seriously destroy the white balance of LED and make the picture color aberration. In this paper, a technique based on Gamma correction of RGB is presented to control the color of LED. The independent Gamma parameters of RGB colors are set up respectively in the system. The system gives a gamma parameter for each RGB color in every 20℃ referring to the normal temperature. In order to compensate the brightness change due to LED temperature characteristic , a detecting circuit of environment temperature is used in the system. According to environment temperature, the system use varying Gamma parameters to adjust the luminance of RGB to get high quality image display.
Luminance Parameter RGB Full Color LED Gamma White Balance
Yan Piao
Department of Electronic Information Engineering,Changchun University of Science and Technology,Changchun 130022, China
国际会议
上海
英文
1655-1657
2007-03-12（万方平台首次上网日期，不代表论文的发表时间）