Light source adapted for LCD back-lit displays

Details Light source adapted for LCD back-lit displays Light source adapted for LCD back-lit displays

2007-11-13

2007-11-13

O'Shea, Sandra (Department: 2875)

Illumination

Edge lighted panel

Light modifier for edge lit light source

C362S612000, C362S631000

Reexamination Certificate

active

11136170

ABSTRACT:
An apparatus having a light source, a reflector, and a light pipe is disclosed. The light source includes a plurality of LED dies arranged in an array along a first direction, each LED die emitting light in a second direction. The light pipe includes a layer of transparent material having a top surface, a bottom surface, and an edge surface. The reflector reflects light from the LED dies traveling in the second direction into the edge surface of the light pipe such that a portion of the light is reflected by the top and bottom surfaces of the reflector. In one embodiment, the reflector redirects light leaving the LED dies within a predetermined cone of angles about the first direction into the light pipe such that the light in that predetermined cone of angles is totally reflected by the top surface of the light pipe.

REFERENCES:
patent: 6386720 (2002-05-01), Mochizuki
patent: 2004/0066645 (2004-04-01), Graf et al.
patent: 2004/0179348 (2004-09-01), Pesenti
patent: 2005/0116235 (2005-06-01), Schultz et al.
patent: 2005/0185421 (2005-08-01), Hayakawa
patent: 2006/0002141 (2006-01-01), Ouderkirk et al.
patent: 2006/0098453 (2006-05-01), Kuo
patent: 2006/0114693 (2006-06-01), Chou et al.

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