Patent ID: 6188379
Filing Date: 2001-02-13
Classification: G09G

Abstract:
A color display system of a field-sequential type comprising:a light source unit composed of a plurality of color light sources which emit light rays of different wavelengths, respectively, which can be controlled independently of one another;a light source driving circuit for driving the light source unit;a shutter unit for controlling transmittivity of light rays emitted by the light source unit; anda shutter control circuit for controlling the shutter unit in synchronization with the light source driving circuit, wherein a visual field is composed of a plurality of sub-fields corresponding to the plurality of color light sources of the light source unit, and multicolor display is effected by lighting the color light sources for specific colors, respectively, for each of the sub-fields, and by controlling the shutter unit according to the sub-field, wherein:the shutter unit comprises a plurality of common electrodes; andsaid shutter control circuit having means for causing a plurality of picture elements to be selectively placed in a display state through multiplexing driving of the common electrodes in response to lighting of the specific color light sources, and means for keeping the shutter unit in a ""closed"" state by scanning each of the plurality of common electrodes within the sub-fields a plurality of times,wherein the shutter control circuit having means for keeping the shutter unit in ""open"" state providing a white reset period additionally within the subfields, respectively.