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Optical sheet, and backlight unit and display having plural microlenses on lens sheet with respective light transmission parts and pairs of reflection layers sandwiching the light transmission parts
Optical sheet, and backlight unit and display having plural microlenses on lens sheet with respective light transmission parts and pairs of reflection layers sandwiching the light transmission parts
One embodiment of the present invention is an optical sheet including a lens sheet having a plurality of microlenses arranged on a front surface thereof and a plurality of projections located at a back side thereof, a projection being located between light transmission parts, and a part corresponding to the microlens being the light transmission part; and a plurality of light reflection layers provided on top of the plurality of projections. A light refracted by the side surface of the projection exits in an oblique direction towards a plane of the optical sheet. Thereby, the view angle can be broadened.
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