Illumination device and display device
US9921360B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2014 |
| Grant date | Mar 20, 2018 |
| Priority date | — |
| Expiry date | Dec 18, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0053
- 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 including a plurality of light-exiting side unit prisms aligned along a second direction; a light-exiting surface-side prism portion including a plurality of light-exiting surface-side prism units aligned along the second direction; a light emission reflection portion including a plurality of reflection units aligned along a first direction at an interval; an opposite plate surface-side prism portion including a plurality of opposite plate surface-side unit prisms aligned along the second direction; and bow-shaped portions disposed into such a form as to be adjacent to the light-exiting surface-side prism units in the second direction while extending along the first direction, the bow-shaped portions having a bow-shaped cross-section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.