Light-guidance plate for liquid crystal display
OwnerNobutaka Kajiurainventor
Life of this patent
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Abstract
The invention relates to a light-guidance plate for liquid crystal display backlights, which ensures frontally symmetric, bright illumination over a wide field angle. The light-guidance plate 1 used for a liquid crystal display backlight comprises a transparent plate substrate having a front surface 11, a back surface 12 and an end face 15 for introduction therein of illumination light from a light source. The back surface 12 is provided with V-grooves 21 of V shape in section or quadrangular cone grooves 21′, each comprising slants 20 and 20 having an angle of ±(45°±5°) with respect to a center plane 1′ including the center of the entrance end 15 and parallel with the plane of the plate substrate, and a direct-reflection layer 30 is provided on each slant.
Claims4
A light-guidance plate used for a liquid crystal display backlight, which comprises a transparent plate substrate having a front surface, a back surface and an end face for introduction therein of illumination light from a light source, wherein said back surface is provided with V-grooves of V shape in section or quadrangular cone grooves, each comprising slants having an angle of ±(45°±5°) with respect to a center plane including a center of said entrance end and parallel with a plane of said plate substrate, with a direct-reflection layer provided on each slant.
Dependencies are inferred from the claim text.