Brightness control system and method for a backlight display device using backlight efficiency
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United States of America Patent
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May 14, 2002
Grant Date -
N/A
app pub date -
Dec 27, 2000
filing date -
Dec 27, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention provides a brightness control system for a backlight display device that uses the efficiency of the backlight to control the backlight to a desired brightness or luminance. The backlight display device may have a display panel, a backlight, a temperature measurement device, and control circuitry. The control circuitry provides a drive current to the backlight in response to a backlight efficiency and a desired brightness signal. The backlight efficiency is a function of the backlight temperature. The brightness control system may maintain the desired brightness throughout the dynamic range of the backlight display device.
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