Liquid crystal display device, light guide plate, and method for producing light guide plate
US6522373B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 26, 2000 |
| Grant date | Feb 18, 2003 |
| Priority date | — |
| Expiry date | Apr 26, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/64
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light guide plate which can achieve improvement of back-lighting or front-lighting luminance without increase of luminance of a light source, and a liquid crystal display device using such a light guide plate. A large number of concave small dots are formed in a surface of the light guide plate opposite to a light emitting surface of the light guide plate which emits light to a liquid crystal cell array so that light incident on the light guide plate from the light source is reflected at the concave small dots in the direction toward the light emitting surface of the light guide plate. Each of the concave small dots is shaped like a triangle with a sectional inclination angle of from 50 to 60° in sectional view and shaped like an approximate rectangle or square in plan view in the direction perpendicular to a surface of the light guide plate and disposed so that a long side of the approximate rectangle or a side of the approximate square is approximately parallel with the longitudinal direction of the light source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.