Patent ID: 6710318
Filing Date: 2004-03-23
Classification: G01J

Abstract:
A brightness feedback display device, comprising:a display panel; a plurality of first photo-sensors for sensing the environmental brightness variation of the display panel and outputting a plurality of corresponding sensing signals; a plurality of first converters, respectively connected to the first photo-sensors and converting the respective sensing signals to a plurality of corresponding first digital reference signals; a light-guiding element for receiving and transmitting a light emitted from the display panel; a feedback sensing unit having a second photo-sensor and a second converter, the second photo-sensor sensing a light variation of the light-guiding element, and then the second converter converting the sensed light variation of the light-guiding element so as to generate a second digital reference signal; and a microprocessor for controlling the brightness of the display panel according to the variation of the first and the second digital reference signals.