Light guide plate and backlight module having high light utilization efficiency by reducing light loss
US8511881B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 2012 |
| Grant date | Aug 20, 2013 |
| Priority date | — |
| Expiry date | Sep 4, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0055
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light guide plate includes a light emitting surface, a bottom surface, a light incident surface and many optical units. Each of the optical units includes a first optical microstructure and a second optical microstructure. The second optical microstructure has a first surface and a second surface. A first cross-sectional line obtained by cutting the first surface along a direction perpendicular to the light incident surface and the light emitting surface is an inclined straight line. A first end of a second cross-sectional line obtained by cutting the second surface along the direction perpendicular to the light incident surface and the light emitting surface and a second end of the second cross-sectional line are connected to form a reference straight line. An acute angle included by the reference straight line and a normal line of the light emitting surface is α. The acute angle α satisfies an equation:
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.