Optical element, and lighting device, display device and electronic device that use the optical element
US8269919B2 · kind B2 · utility
2Cited by
8References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2011 |
| Grant date | Sep 18, 2012 |
| Priority date | — |
| Expiry date | Sep 23, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/005
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A micro-louver (1) includes: a transparent substrate (2); a concavoconvex shape portion (5) formed on at least one surface of the transparent substrate (2) and in a prescribed pattern for diffracting incident light to form an image; and a light controlling layer (7) including at least one transparent layer (3) and at least light-absorption layer (4) arranged alternately on said at least one surface of the transparent substrate (2), each of said at least one transparent layer (3) and said at least one transparent layer (4) extending in a direction that intersects said at least one surface of the transparent substrate (2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.