Back light device for crystal liquid display
First Claim
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1. A back light device for a liquid crystal display, comprising:
- a light guide plate;
one or more tubular light sources disposed at one or more end surfaces of the light guide plate; and
a plurality of diffusing prisms formed on a surface of the light guide plate, each of the diffusing prisms having a substantially isosceles triangle cross-section and a ridge extending along the direction perpendicular to the axis of the tubular light source, wherein the apical angle of each of the diffusing prisms is set in the range of 65-85 degrees.
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Abstract
A back light device for a liquid crystal display is provided, which comprises diffusing prisms formed on the surface of the light guide plate, and the apical angle of the diffusing prism is set in the range of 65-85 degrees for a uniform and brighter illumination using the same light source.
58 Citations
8 Claims
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1. A back light device for a liquid crystal display, comprising:
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a light guide plate; one or more tubular light sources disposed at one or more end surfaces of the light guide plate; and a plurality of diffusing prisms formed on a surface of the light guide plate, each of the diffusing prisms having a substantially isosceles triangle cross-section and a ridge extending along the direction perpendicular to the axis of the tubular light source, wherein the apical angle of each of the diffusing prisms is set in the range of 65-85 degrees. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification