Back light unit having light guide buffer plate

Details Back light unit having light guide buffer plate Back light unit having light guide buffer plate

2007-11-29

2009-12-08

Husar, Stephen F (Department: 2875)

Illumination

Edge lighted panel

Light guide

C362S608000, C362S612000, C362S623000, C362S626000, C385S146000

Reexamination Certificate

active

07628527

ABSTRACT:
There is provided a back light unit having a light guide buffer plate. The back light unit having a light guide buffer plate includes a light source for generating the light when a power source is applied; a light guide panel whose light-receiving vertical surface that the light emitted from the light source enters is provided with a first prism pattern and whose bottom surface is provided with a refraction pattern, thereby converting the incident light from the light-receiving vertical surface into a surface light source; a reflection unit disposed in a bottom surface of the light guide panel to reflect light toward the light guide panel; and a buffer disposed between the light source and the light guide panel and whose light-emitting vertical surface corresponding to the light-receiving vertical surface of the light guide panel is provided with a second prism pattern. The back light unit can be useful to improve visibility, a mixing property and uniformity by basically removing a poor-visibility zone, which is formed in an end of the light guide panel, without any changes in the structure of the light guide panel.

REFERENCES:
patent: 6086212 (2000-07-01), Onishi et al.
patent: 6497492 (2002-12-01), Benoit et al.
patent: 6805468 (2004-10-01), Itoh et al.
patent: 6979095 (2005-12-01), Min et al.
patent: 7206491 (2007-04-01), Feng et al.
patent: 7217025 (2007-05-01), Kim et al.
patent: 2003-297126 (2003-10-01), None

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