Light guide plate, light source device equipped therewith...

Details Light guide plate, light source device equipped therewith... Light guide plate, light source device equipped therewith...

2006-07-11

2006-07-11

O'Shea, Sandra (Department: 2875)

Illumination

Edge lighted panel

Light guide

C362S560000, C362S623000, C362S628000, C362S026000, C362S330000, C362S297000

Reexamination Certificate

active

07073933

ABSTRACT:
A display device used for a display unit of portable electronic equipment, a light source device therefor and a light guide plate, suppressing dispersion in the brightness and featuring a high contrast and a good display quality. The constitution includes a light incidence surface on where light emitted from an LED falls, a light reflection surface formed facing the light incidence surface and reflects light from the light incidence surface, a light outgoing surface arranged between the light incidence surface and the light reflection surface, and has a circularly polarizing plate intimately adhered onto the surface thereof, and an opposing surface formed facing the light outgoing surface and in which there are alternately arranged first opposing surfaces for guiding the incident light to the light outgoing surface as well as to the light reflection surface, and second opposing surfaces for emitting the light reflected by the light reflection surface through the light outgoing surface.

REFERENCES:
patent: 5886759 (1999-03-01), Mashino et al.
patent: 6631998 (2003-10-01), Egawa et al.
patent: 6742921 (2004-06-01), Umemoto et al.
patent: 2003/0165067 (2003-09-01), Imamura et al.
patent: 2001-255415 (2001-09-01), None
patent: 2001-281456 (2001-10-01), None
patent: 2004127810 (2004-04-01), None

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