Backlight device for a liquid crystal display device
AssigneeLG. Philips LCD Co., Ltd.
InventorsJonghoon Lee, Chul Park, Seehyung Lee
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Abstract
The present invention discloses a backlight device for a liquid crystal display device, which includes a light source; a light waveguide plate having an end portion and a front portion; a lamp holder having a lamp reflector, the lamp holder surrounding most part of the light source, the lamp reflector reflecting a light to the end portion of the light waveguide plate; and a first prism sheet located on the front portion of the light waveguide plate, the prism sheet having a plurality of convex portions, the convex portions having an inclined line portion and a curved line portion, the inclined line portion having an predetermined angle with respect to a direction vertical to the front portion of the light waveguide plate.
Claims16
A backlight device for a liquid crystal display device, comprising:
- a light source;
- a light waveguide plate having an end portion and a front portion;
- a lamp holder having a lamp reflector, the lamp holder surrounding most of the light source, the lamp reflector reflecting a light to the end portion of the light waveguide plate;
- and
- a first prism sheet located on the front portion of the waveguide plate wherein a diffusion sheet is interposed between said first prism sheet and said waveguide plate, the prism sheet having a plurality of convex portions, the convex portions having an inclined line portion with respect to a direction vertical to the front portion of the light waveguide plate, and a curved line portion, the inclined line portion having a predetermined angle with respect to a direction vertical to the front portion of the light waveguide plate, wherein said angle is less than 20° and greater than 0°.
A backlight device for a liquid crystal display device, comprising:
- a light source;
- a light waveguide plate having an end portion and a front portion;
- a lamp holder having a lamp reflector, the lamp holder surrounding most of the light source, the lamp reflector reflecting a light to the end portion of the light waveguide plate;
- and
- a first prism sheet located on the front portion of the waveguide plate, wherein a diffusion sheet is interposed between said first prism sheet and said waveguide plate the prism sheet having a plurality of convex portions, the convex portions having an inclined line portion and a curved line portion, the inclined line portion having an predetermined angle with respect to a direction vertical to the front portion of the light waveguide plate, wherein said angle is 14°.
Dependencies are inferred from the claim text.