Light emitting diode having diffraction grating and planar...

Details Light emitting diode having diffraction grating and planar... Light emitting diode having diffraction grating and planar...

2007-04-24

2007-04-24

Ward, John Anthony (Department: 2875)

Illumination

Edge lighted panel

Light source

C362S800000, C362S267000, C257S098000, C257S099000, C438S032000, C313S512000

Reexamination Certificate

active

10946447

ABSTRACT:
A planar light source device (100) for a display device includes a light guide plate (120) and pluralities of light emitting diodes (110). The light guide plate has a light incident surface (121). The light emitting diodes are located in the vicinity of the light incident surface. Each light emitting diode has a light emission surface opposite to the light incident surface of the light guide plate, and has a diffraction grating (117) provided on the light emission surface for improving a range of divergence of light beams emitted therefrom.

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