Backlight unit and liquid crystal display using the same

摘要

This invention relates to a backlight unit that is adaptive for reducing light loss caused by an intermediate light guide panel and reducing sag of the intermediate light guide panel. A backlight unit may include a bottom cover where a reflection plate is formed, a plurality of light emitting diodes installed inside the bottom cover, a plurality of intermediate light guide panels installed on the light emitting diodes and separated from each other, a diffusion plate for diffusing the light from the intermediate light guide panels and the reflection plate, and a plurality of optical sheets placed on the diffusion plate.

主权项

1. A backlight unit for a display, comprising:
a bottom cover; a plurality of light emitting diodes formed over the bottom cover; a lower reflection plate formed over a lower surface of the bottom cover, wherein a plurality of holes are formed corresponding to the plurality of light emitting diodes to allow the plurality of light emitting diodes to penetrate therethrough; a plurality of intermediate light guide panels formed over the plurality of light emitting diodes; and a plurality of first light guide panel supporting stands and a plurality of second light guide panel supporting stands formed over the lower reflection plate to support the plurality of intermediate light guide panels, wherein the plurality of intermediate light guide panels includes lower and upper surfaces through which light emitted from the light emitting diodes is transmitted, and side surfaces and corners including a light absorbing material, wherein the first light guide panel supporting stands and a plurality of second light guide panel supporting stands support both sides of each of the intermediate light guide panel, wherein each of the first light guide panel support stands is comprised as a plurality of first columns separated by a designated gap, wherein each of the second light guide panel supporting stands is comprised as a plurality of second columns separated by a designated gap, wherein an upper portion of the first and second light guide panel supporting stands has a plate-type construction and contact a lower portion of the intermediate light guide panels, wherein the first columns respectively separated by the designated gap are parallel along a first side of each of the intermediate light guide panels, wherein the second columns respectively separated by the designated gap are parallel along a second side of each of the intermediate light guide panels, and wherein the first side of each of the intermediate light guide panels and the second side of each of the intermediate light guide panels are corresponding to each other.