Lens, light source unit, backlight apparatus, and display apparatus
US8585254B2 · kind B2 · utility
7Cited by
12References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 5, 2009 |
| Grant date | Nov 19, 2013 |
| Priority date | — |
| Expiry date | Mar 10, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21V5/043
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens diffusing light emitted from a light source includes a concave light-incident surface, a light guide portion, and a light-emitting surface. The light-incident surface includes a plane portion opposed to the light source and an optical function portion that is formed on the plane portion and one of scatters and diffuses the light. The light emitted from the light source enters the light-incident surface. The light that has entered the light-incident surface passes through the light guide portion. The light-emitting surface emits the light passed through the light guide portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.