Weighted frame rate control with dynamically variable driver bias voltage for producing high quality grayscale shading on matrix displays

摘要

A system for improving the grayshading of matrix displays that effect grayshading by frame rate control (i.e., temporal dithering) includes a computer program which dynamically controls the bias voltage of the electrodes that define the pixels of the display. Per frame rate control principles, an image is established by a plurality of sequentially displayed frames, with the energization of the pixels of the frames being dithered so that the frames together establish a desired grayshading for the image. In accordance with the present invention, the electrode bias voltage to the display is dynamically varied for each frame and/or row to provide for an increased number of grayshades vis-a-vis frame rate control systems that have a constant bias voltage.