Display driver with duty cycle control
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United States of America Patent
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-
Sep 19, 1995
Grant Date -
N/A
app pub date -
Nov 4, 1993
filing date -
Nov 4, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A display sign includes a matrix of LED lights which are energized from an unregulated power supply during periodic duty cycles. The duty cycles are adjusted by a programmed microprocessor such that the power supply is not overloaded when a large number of LEDs are energized, and such that excessive power is not applied to the LEDs when a small number of LEDs are energized and the power supply voltage increases.
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Family
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Cited Art Landscape
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