Light guide plate with adjustable illumination angle, illumination device with adjustable illumination angle, and method for adjusting illumination angle thereof
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United States of America Patent
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Jan 21, 2014
Grant Date -
Jan 31, 2013
app pub date -
Jul 31, 2012
filing date -
Jul 31, 2011
priority date (Note) -
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Abstract
A light guide plate with an adjustable illumination angle and an illumination device using the same are provided. The light guide plate has a first surface and a second surface opposite to the first surface. The second surface further has a plurality of deformable microstructures thereon. The deformable microstructures will be deformed when an external force is applied to the deformable microstructures. The illumination device has a light source and a light guide plate that is disposed next to the light source. A light beam emitted from the light source enters into the light guide plate and leaves the light guide plate via reflecting or refracting by the deformable microstructures. By applying a different external force to the light guide plate, the deformation of the deformable microstructures will be varied. Therefore, the illumination angle of the light beam could be changed according to the deformation of the deformable microstructures.
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