Light guide plate with subwavelength grating and backlight...

Details Light guide plate with subwavelength grating and backlight... Light guide plate with subwavelength grating and backlight...

2007-07-03

2007-07-03

Luebke, Renee (Department: 2875)

Illumination

Edge lighted panel

Light guide

C359S558000, C359S559000, C359S563000, C359S566000, C359S569000, C359S572000, C362S615000

Reexamination Certificate

active

11021970

ABSTRACT:
A light guide plate (30) has a light incident surface (305) for receiving light, a light emitting surface (301) for emitting light, a bottom surface (303) opposite to the light emitting surface, and side surfaces (307, 309, 311). A subwavelength grating (302) is formed on the light incident surface for diffracting the light. The subwavelength grating is a zeroth-order grating which covers a wide wavelength band and diffracts the light into zeroth-order waves. So that the light guide plate has a high light utilization efficiency and yields high uniformity of outgoing light.

REFERENCES:
patent: 6139163 (2000-10-01), Satoh et al.
patent: 6266473 (2001-07-01), Saccomanno et al.
patent: 2002/0003661 (2002-01-01), Nakai
patent: 2004/0021945 (2004-02-01), Tompkin et al.
Omori, Shigeto et al. “Illumination by subwavelength grating with antireflection effect,” 2001, Lithographic Micromaching Techniques for Optical Component Fabrication, SPIE vol. 4440, 285-292.

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