Sequential color display device
AssigneeCitizen Electronics Co., Ltd.
InventorHarumi Yuyama
Life of this patent
Estimating the term…
Abstract
Red, green and blue light sources, and a shutter are provided. Photosensors are provided for detecting the luminance of each of the light sources. A controller is provided for sequentially operating each of the light sources, the shutter, and the photosensor in synchronism with each other at regular intervals. A luminance control circuit is provided for comparing a luminance detected by the photosensor with a reference value and for controlling the luminance of each of the light sources based on the comparison so as to keep a color balance of the light emitted from the color display device.
Claims12
A sequential color display device comprising:
- a plurality of light sources, each emitting different color light from other light sources;
- a shutter for sequentially passing color light beams from the light sources;
- at least one photosensor for detecting luminance of each of the light sources;
- a controller for sequentially operating each of the light sources, the shutter, and the photosensor in synchronism with each other at regular intervals;
- and
- luminance control means responsive to a luminance detected by the photosensor for controlling the luminance of each of the light sources so as to keep a color balance of the light emitted from the color display device.
Dependencies are inferred from the claim text.