LCD backlight unit having 40° half power angle without...

Details LCD backlight unit having 40° half power angle without... LCD backlight unit having 40° half power angle without...

2005-10-18

2005-10-18

Cariaso, Alan (Department: 2875)

Illumination

Edge lighted panel

Light guide

C362S619000, C362S560000, C362S615000, C349S064000, C349S065000

Reexamination Certificate

active

06955460

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.

REFERENCES:
patent: 5598280 (1997-01-01), Nishio et al.
patent: 5617251 (1997-04-01), Ohta et al.
patent: 5627926 (1997-05-01), Nakamura et al.
patent: 6425673 (2002-07-01), Suga et al.
patent: 6435686 (2002-08-01), Gotou et al.
patent: 1994-15537 (1994-07-01), None

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