应用于等离子体显示器的自适应子场编码驱动方法

A Driving Method with Adaptive Subfield Coding Applied to Alternating Current Plasma Display Panels

为解决交流等离子体显示器(AC PDP)中传统“单纯累积”发光模式产生的灰度显示不足的问题,本文提出了一种自适应子场编码驱动方法(ASC).该方法中子场编码根据每一场输入图像的归一化灰度直方图进行自适应地计算,将子场编码权值选取在输入图像灰度信息最丰富的区间.同时根据计算出的子场编码,驱动电路调整各个子场的维持脉冲个数.仿真结果表明,该方法不仅能够消除AC PDP中的动态假轮廓现象,而且弥补了传统“单纯累积”发光模式造成的灰度显示不足的问题,具有良好的灰度显示效果.

The image quality suffers from the lack of grayscale expression capability when the ＇ simple-accumulation＇ -lighting-mode is applied to alternating current plasma display panels （AC PDP）. To solve the problem,an adaptive subfield coding（ASC）driving method was proposed, in which subfield vector is adaptively figured out based on the normalized histogram of input image every TV field. The calculated subfield vector can express the most grayscale informarion of input image. And then the sustain pulse number of each subfield is adjusted according to the calculated subfield vector. Simulation results show that, the proposed method can eliminate the dynamic false contours in AC PDPs, and overcome the lack of grayscale expression capability caused by the simple-accumulation＇ -lighting-mode. It can provide good grayscale expression in AC PDPs.