Light-controlling element, display device and illumination device
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United States of America Patent
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Jun 23, 2015
Grant Date -
Jun 6, 2013
app pub date -
Jul 25, 2011
filing date -
Aug 10, 2010
priority date (Note) -
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Abstract
A light-controlling element includes an illumination unit capable of controlling an amount of emitted light, and a light guide body on which the light emitted from the illumination unit is incident. The light guide body has a function of propagating the light while totally reflecting the light inside the light guide body, and the light guide body has a function of propagating the light emitted from the illumination unit at a plurality of different propagation angles inside the light guide body. The light guide body includes a plurality of light extraction regions having a function of extracting the light to the outside. At least two of the plurality of light extraction regions have different incidence angle ranges in which the light is capable of being extracted to the outside.
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