Illumination apparatus, display apparatus, and method of producing an illumination apparatus
US8469530B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 2008 |
| Grant date | Jun 25, 2013 |
| Priority date | — |
| Expiry date | Nov 12, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133614
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
[Object] To provide an illumination apparatus capable of suppressing a chromaticity fluctuation due to a view angle and an incident angle.[Solving Means] In an illumination apparatus for a display apparatus that includes a blue-color light-emitting diode (10) as a light source and a phosphor sheet (21) including a phosphor that obtains white light by converting a color of blue light from the blue-color light-emitting diode (10), diffusion plates (22, 23) are respectively provided opposed to a light-emitting-side surface and a light-incident-side surface of the phosphor sheet (21). The diffusion plate (22) opposed to the light-emitting-side surface of the phosphor sheet (21) suppresses a fluctuation of white-color chromaticity due to a view angle, and the diffusion plate (23) opposed to the light-incident-side surface of the phosphor sheet (21) suppresses a fluctuation of white-color chromaticity due to an incident angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.