Color calibration for LCD panel
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 29, 1994
Grant Date -
N/A
app pub date -
Mar 31, 1992
filing date -
Mar 31, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A presentation system uses a computer to store and transmit electronic images to a liquid crystal display (LCD) panel which rests on an overhead projector. The LCD panel includes a calibration circuit designed to correct discrepancies in the saturation levels of the three primary colors. The calibration circuit determines the digital values in a signal corresponding to a test pattern of maximum intensity for all three colors, and compares these values to predetermined theoretical values. The differences between these values are recorded as calibration constants and are used to correct the image signals transmitted from the computer. A remote control unit may be used to provide a stimulus to both the computer (to generate the test pattern) and the LCD panel (to execute the calibration process).
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