Prism sheet of liquid crystal display device and backlight unit using the same
US7252428B2 · kind B2 · utility
5Cited by
6References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 30, 2004 |
| Grant date | Aug 7, 2007 |
| Priority date | — |
| Expiry date | Jun 26, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0065
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A prism sheet of an LCD includes a body part made of a transparent resin material and a plurality of polypyramid-shaped optical unit structures formed in a intaglio type on the body part. The plurality of optical unit structures have intaglio-type polypyramid shapes in an inside of their polygonal structure. A center of the intaglio portion corresponds to a vertex of the polypyramid, thereby forming a point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.