Illumination unit, projection display unit, and direct view display unit
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United States of America Patent
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Nov 25, 2014
Issued Date -
N/A
app pub date -
Mar 8, 2012
filing date -
Mar 28, 2011
priority date (Note) -
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Abstract
An illumination unit includes one or more light sources and an optical member. The optical member includes an integrator having a first fly-eye lens on which light from a solid-state light-emitting device is incident and a second fly-eye lens on which the light from the first fly-eye lens is incident. The integrator uniformalizes an illuminance distribution of light in a predetermined illumination region illuminated by the light incident from the solid-state light-emitting device. Each of the first fly-eye lens and the second fly-eye lens has a plurality of cells. The cells of the first fly-eye lens are arranged in a first direction and a second direction that intersect each other, and positions of the cells in the second direction are different from one another at least partially among a plurality of cell rows arranged along the first direction in the first fly-eye lens.
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