What exemplifies the invention is an electro-optical device that includes a matrix of pixel elements, a matrix of pixel drivers, each of which corresponds to each of the pixel elements, and a matrix of element processors, each of which corresponds to each of the pixel drivers. The element processors collaborate in executing grayscale calculation for transforming the grayscale resolution of the pixel data into another grayscale resolution, which is intrinsic in the couple of the pixel element and the driver, with reference to error distributed from the adjacent element processors in order to supply the result of calculation to the corresponding pixel driver, and also in distributing the error of grayscale calculation to the adjacent pixel elements.