主动式有机发光显示器的伽马校正

摘要

Gamma correction is used to correct the nonlinear relationship between luminance and brightness, to vision information of reproduction source objects truly. So the principle of Gamma correction in Organic Light Emitting Diode (OLED) is described. For the gray scale distortion of the SVGA050 micro-display which is caused by the difference between the optical and electrical characteristic property, a Look-Up Table (LUT) Gamma correction system of AM-OLED is proposed, which is used the PIC18LF2550 (a)s the MCU and the master of the I2C serial bus. The development of the hardware system measurement verifies the correction of VGA and CVBS video input and the picture quality also apparently improved.%针对平板显示器在光电转换过程中出现的非线性关系,视频图像在处理过程中引入了伽马校正.本文提出了一种关于0.5英寸主动式有机发光显示器SVGA050D的伽马校正方法.该方法根据查找表的对应关系,采用PIC单片机作为主控芯片,通过串行总线通信配置显示器和解码芯片等内部寄存器生成查找表的方式,实现了输入为VGA或复合视频信号的伽马校正.经实验验证,校正功能得到了有效的实现,视频图像的质量明显改进.