Light emitting device and display apparatus and read apparatus using the light emitting device
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United States of America Patent
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Mar 31, 2009
Grant Date -
Jun 2, 2005
app pub date -
Feb 27, 2003
filing date -
Mar 1, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A light emitting device provided with a plurality of types of light sources having different light emitting colors and with a light emission control means for allowing light to emit, during a specified period of monitoring a light emitting intensity, from at least one light source out of the plurality of types of light sources at a light emitting intensity different from that available outside the specified period. Accordingly, when a plurality of types of light sources are used, the light emitting intensities of a plurality of types of light sources can be monitored with light sensors of types fewer than the types of light sources to control while points and a brightness characteristics.
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