Illumination device and display device
US10317610B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 2014 |
| Grant date | Jun 11, 2019 |
| Priority date | — |
| Expiry date | Dec 30, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133331
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A backlight device is provided with: LEDs; a light guide plate having a light-receiving face, a light-exiting surface, and an opposite plate surface; a prism sheet that is disposed on the light-exiting side of the light guide plate and that includes a plurality of light-exiting side prisms aligned along a second direction; a light-exiting surface-side prism portion that is disposed in the light-exiting surface of the light guide plate and that includes a plurality of light-exiting surface-side prisms aligned along the second direction; a light emission reflection portion that is disposed in the opposite plate surface of the light guide plate and that includes a plurality of reflection units aligned along a first direction at an interval; and an opposite plate surface-side prism portion that is disposed in the opposite plate surface of the light guide plate and that includes a plurality of opposite plate surface-side prisms aligned along the second direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.