Brightness enhancement article having trapezoidal prism surface
US6997595B2 · kind B2 · utility
36Cited by
13References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 18, 2003 |
| Grant date | Feb 14, 2006 |
| Priority date | — |
| Expiry date | Oct 19, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133615
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A brightness enhancement article for improving luminance from a light source includes a light-collecting prism surface forms a series of longitudinal trapezoidal prism elements in which each has a face plane disposed toward the light source and first and second legs extending back from the face plane, forming first and second base anglesβ with the face plane wherein both first and second base anglesβ satisfy: 90 degrees<base angle β<120 degrees.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.