Optical film composite for brightness enhancement including a birefringent polymer layer
US8547637B2 · kind B2 · utility
0Cited by
8References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2006 |
| Grant date | Oct 1, 2013 |
| Priority date | — |
| Expiry date | Aug 21, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2457/202
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention provides an optical film composite that includes a linear, reflective polarizing film; a first polymeric substrate layer having birefringence, which is placed on the reflective polarizing film; and a second polymeric substrate layer placed beneath the reflective polarizing film, wherein the optical axis of the first polymeric substrate layer is oriented with respect to the transmission axis of the reflective polarizing film to have of 0° to 25° of an angular difference between the axes. The optical film composite can be employed in LCD devices to improve optical performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.