Display with segmented common voltage paths and common voltage compensation circuits

摘要

A display has an array of pixels controlled by display driver circuitry. Gate driver circuitry supplies gate line signals to rows of the pixels. The pixels may be liquid crystal display pixels. Each pixel may have a common electrode voltage terminal. The display may have a transparent conductive film that forms a common electrode voltage layer that overlaps that array and that is shorted to the common electrode voltage terminals of the pixels. Metal common electrode voltage lines may run across the transparent conductive film to reduce resistance. Metal common electrode voltage paths that are coupled to the metal common electrode voltage lines may run along the left and right edge of the display. Common electrode voltage compensation circuits may receive feedback from the metal common electrode voltage paths. There may be two or more common electrode voltage compensation circuits for both the left and right edges of the display.

主权项

1. A display, comprising:
an array of pixels having first and second opposing edges and third and fourth opposing edges; and display driver circuitry that provides data signals to columns of the pixels, and that has gate driver circuitry that provides gate line signals to rows of the pixels, wherein the array of pixels includes a common electrode voltage layer that provides a common electrode voltage to each of the pixels in the array of pixels and includes a first common electrode voltage path that runs along the first edge and a second common electrode voltage path that runs along the second edge, and wherein the display driver circuitry includes first, second, third and fourth common electrode voltage compensation circuits, the first common electrode voltage compensation circuit having an output that is coupled to a first segment of the first common electrode voltage path and the second common electrode voltage compensation circuit having an output that is coupled to a second segment of the first common electrode voltage path, the third common electrode voltage compensation circuit having an output that is coupled to a first segment of the second common electrode voltage path and the fourth common electrode voltage compensation circuit having an output that is coupled to a second segment of the second common electrode voltage path.