Backlight unit
AssigneeLG.Philips LCD Co., Ltd.
InventorJae Bum Kim
Life of this patent
Estimating the term…
Abstract
A backlight unit includes a light emission part having a lamp for emitting light beams and a lamp housing for mounting the lamp therein and for reflecting the light beams from the lamp; a light guide panel for guiding the light beams from the light emission part; a reflecting plate under the light guide panel for reflecting the light beams that progress to a lower surface and a side surface of the light guide panel; a diffusion sheet having a thickness of about 113 μm for diffusing the light beams that have passed through the light guide panel; and a prism sheet having a thickness of about 165 μm and having a half-power angle of at least about 40° for controlling progress directions of the light beams that have passed through the diffusion sheet.
Claims10
A backlight unit, comprising:
- a light emission part having a lamp for emitting light beams and a lamp housing for mounting the lamp therein and for reflecting the light beams from the lamp;
- a light guide panel for guiding the light beams from the light emission part;
- a reflecting plate under the light guide panel for reflecting the light beams that progress to a lower surface and a side surface of the light guide panel;
- a diffusion sheet having a thickness of about 113 μm for diffusing the light beams that have passed through the light guide panel;
- and
- a prism sheet having a thickness of about 165 μm and having a half-power angle of at least about 40° for controlling progress directions of the light beams that have passed through the diffusion sheet.
A backlight optical device to be coupled with a light emission part that emit light beams, the device comprising:
- a light guide panel configured to guide the light beams from the light emission part;
- a reflecting plate under the light guide panel for reflecting the light beams that progress to a lower surface and a side surface of the light guide panel;
- a diffusion sheet having a thickness of about 113 μm for diffusing the light beams that have passed through the light guide panel;
- and
- a prism sheet having a thickness of about 165 μm and having a half-power angle of at least about 40° for controlling progress directions of the light beams that have passed through the diffusion sheet.
Dependencies are inferred from the claim text.