Backlight device and display apparatus
US8506150B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 2011 |
| Grant date | Aug 13, 2013 |
| Priority date | — |
| Expiry date | Mar 23, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N13/32
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
According to one embodiment, a backlight device includes a light source, a light guide plate, a light beam controller, and a directivity control element. The light guide plate is formed with plural diffusion portions that diffuse light from the light source. The light beam controller is configured to emit plural linear light beams. The directivity control element has plural optical openings. The optical openings extend in a second direction and are arranged in a first direction perpendicular to the second direction. The light beam controller emits the linear light beams that extend in a third direction tilted with respect to the second direction. The light guide plate has a first region in which the diffusion portions are formed in the third direction and a second region in which no diffusion portions are formed, the first region and the second region being arranged alternately in the first direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.