Apparatus and method for LED emission spectrum control
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United States of America Patent
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Aug 2, 1994
Grant Date -
N/A
app pub date -
May 27, 1992
filing date -
May 27, 1991
priority date (Note) -
Expired
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Abstract
An emission spectrum controlling apparatus and method for an LED are disclosed. A temperature measurement device is provided for measuring the temperature of a light emitting diode or the temperature in the surrounding environment of the light emitting diode. A driving power control device is also provided for controlling the driving power of the LED, and a computing unit is disclosed which controls the driving power control device based on the temperature information from the temperature measuring device and the driving power information from the driving power control device.
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