Light guide plate and display device using the same
US8297824B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 2, 2009 |
| Grant date | Oct 30, 2012 |
| Priority date | — |
| Expiry date | Oct 31, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0041
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
To solve an uneven light quantity caused in a case where a light guide plate, in which light from a spot light source such as an LED enters an surface, changes by 90 degrees and exits the light to the outside, is used as a backlight. The light guide plate of the invention includes a light flux unifying region. The light flux unifying region has an incident surface, a first surface, and an exit surface. Light fluxes emitted from a light source enter the incident surface. The first surface is almost perpendicular to the incident surface and the intensity distribution of the light fluxes having entered is unified at the first surface. The exit surface is disposed almost parallel with the incident surface and the unified light fluxes exit from the exit surface. A boundary line between the incident surface and the first surface has a zigzag surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.