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Abstract

A system has a screen module for displaying multicolor images on a screen having orderly-arrayed first, second, and third color LEDs, and a data-sending module sending control signals and image data to be displayed. The screen module has first, second, and third color gradation-control circuits for each pixel. The data-sending module comprises: a frame memory for temporarily storing image data; an image-data transfer controller for reading out image data from the memory and outputting it with a data-transfer clock; first, second, and third color pulse-train generators for generating high-speed pulse trains to be given to each gradation-control circuit; and a pulse-train outputting means for outputting the pulse trains for each color. Each pulse-train generator generates, with a constant period, pulse trains of 2.sup.n pieces or a number closely therebelow, pulse intervals varying with time according to a preset characteristic.

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First Claim