Light guide plate with overlapping diffusion net points, and illumination apparatus using such plate
US8534902B2 · kind B2 · utility
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16References
16Claims
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Key dates
| Filing date | Oct 26, 2010 |
| Grant date | Sep 17, 2013 |
| Priority date | — |
| Expiry date | Apr 5, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0073
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An illumination apparatus includes a light guide plate having a plurality of first and second diffusion net points formed on a surface of a light transmissive substrate, and at least one light emitting element disposed to emit light into a light incident surface of the light guide plate. A portion of the first diffusion net points at least partially overlaps the second diffusion net points, and the size of the first diffusion net points is smaller than the size of the second diffusion net points.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.