Voltage control for adjusting the brightness of a screen display
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United States of America Patent
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Aug 7, 2001
Grant Date -
N/A
app pub date -
Aug 30, 1996
filing date -
Aug 30, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of controlling the brightness level of a screen display having a matrix of pixels that each have a brightness level controlled by a first and second voltage includes maintaining the first voltage of each pixel at a preselected voltage level. The second voltage level is controlled and adjusted depending on the ambient light conditions. The second voltage is increased during daytime conditions to increase the brightness of the screen display and decreased during nighttime conditions to decrease the brightness of the display. The ambient light conditions are determined by using a light-sensitive sensor or a manually adjustable control.
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