为了提高硅基微显示器灰度等级及分辨率,同时保持像素灰度线性度,结合模拟幅值调制和数字脉宽调制的优点,对数模融合扫描策略进行研究。介绍了子空间位权值扫描算法及其对扫描效率提高的作用,介绍了数模融合扫描的比特位和灰度调制,以及256级灰度案例推导。结果表明:所述方法能有效降低数据传输所需频率,且随着灰度等级及分辨率增加这一优势更加明显。在256级灰度、1920 pixel×1080 pixel的分辨率时,所需数据传输频率只需52.49 MHz,扫描效率达到92.58%,且线性度为100%。该方法缩小了所需数据传输频率,有效降低了对显示器件的要求。

In order to improve the grayscale level and resolution of the micro display on silicon, and maintain pixel grayscale linearity at the same time, the study of digital and analog hybrid scan strategy is proposed with the advantages of analog amplitude modulation and digital pulse width modulation. The subspace weight-bit scan algorithm and its effect of improving the scanning efficiency are introduced. Then, the bit and grayscale modulation of the digital and analog hybrid scan strategy are introduced, and a 256-level grayscale case is deduced. The result shows that the method can reduce the data transfer frequency effectively and this advantage becomes more obvious with the increasing of the grayscale and resolution. In the case of 256 grayscale and 1920 pixel×1080 pixel resolution, the required data transfer frequency can be reduced to 52.49 MHz, the scanning efficiency is 92.58% and the linearity keeps at 100%. This method reduces the required data transfer frequency and the requirement of the display device.