Illumination device and display device
US9921363B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 2013 |
| Grant date | Mar 20, 2018 |
| Priority date | — |
| Expiry date | Oct 14, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13396
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This backlight device (illumination device) is provided with (LEDs) light source; a light guide plate having a light-receiving face that opposes the LEDs and where light from the LEDs is incident, and a light-exiting surface where the incident light is emitted; and an optical sheet (optical member) arranged in opposition to the light-exiting surface of the light guide plate and imparting an optical effect to the light emitted from the light-exiting surface. Here, the optical sheet has, in at least one portion thereof, a chromaticity correction region for which x and y chromaticity coordinate values in a CIE 1931 color space both decrease with distance from the LEDs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.