Optical member, illuminating device, and projection type video display
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 3, 2007
Grant Date -
Sep 29, 2005
app pub date -
Mar 22, 2005
filing date -
Mar 29, 2004
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A LED light source is formed of a plurality of LEDs (light-emitting diodes). Primary optical axes of respective LEDs are set to be perpendicular to the plane surface (LED arranging plane surface). A first LED light source emits a light in red, a second LED light source emits a light in green, and a third LED light source emits a light in blue. An optical member has a first dichroic mirror portion and a second dichroic mirror portion alternately arranged, and the mirror potions inclined and arranged so as to form a saw-tooth appearance. Both the first dichroic mirror portion and the second dichroic mirror portion are designed to transmit the light in blue, and reflect lights in other colors.
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Cited Art Landscape
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