Light guide element for controlling light shape
US9033552B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2013 |
| Grant date | May 19, 2015 |
| Priority date | — |
| Expiry date | Sep 22, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0994
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light guide element for controlling light shape includes a light-incident surface, a light-emitting surface, a first reflecting surface, and a second reflecting surface. The light-incident surface includes a first outer peripheral edge and a first inner peripheral edge. The light-emitting surface includes a second outer peripheral edge and a second inner peripheral edge. The first reflecting surface is constructed by a first profile curve, and connects the first and the second outer peripheral edge. The first profile curve is a connecting line of two points respectively on the first outer peripheral edge and the second outer peripheral edge. The second reflecting surface is constructed by a second profile curve, and connects the first and the second inner peripheral edge. The second profile curve is a connecting line of two points respectively on the first inner peripheral edge and the second inner peripheral edge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.