Automatic Illuminance Compensation in Displays
First Claim
1. Apparatus for sensing illuminance of ambient light (112) falling on a display, said apparatus comprising a photo-sensitive device (100) located behind said display for receiving light falling on said display and generating an electric signal representative thereof, and a diffuser (110) located between a source (112) of said ambient light and said photo-sensitive device (100).
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Accused Products
Abstract
A sensor for continuously measuring the illuminance of ambient light (112) falling on a display. The sensor comprises a photo-sensitive device (100) and a diffuser (110), and conforms reasonably closely to the cosine effect. The proposed sensor performs like an illuminance meter and provides an illuminance measurement for use in continuously adjusting the grey scale transfer function of the display to maintain calibration thereof to a target transfer function and thereby to compensate for the above-mentioned illuminance.
26 Citations
14 Claims
- 1. Apparatus for sensing illuminance of ambient light (112) falling on a display, said apparatus comprising a photo-sensitive device (100) located behind said display for receiving light falling on said display and generating an electric signal representative thereof, and a diffuser (110) located between a source (112) of said ambient light and said photo-sensitive device (100).
Specification