Compensation films for liquid crystal displays
US6819381B2 · kind B2 · utility
5Cited by
8References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 28, 2002 |
| Grant date | Nov 16, 2004 |
| Priority date | — |
| Expiry date | Oct 28, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2413/105
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed is an optical compensation film for improves viewing angle of twisted nematic liquid crystal display, especially in the vertical viewing direction. The said optical compensation film contains a positively birefringent material oriented with its optic axis tilted in a plane perpendicular to the film plane, wherein the phase retardation value defined by (ne-no)d is 100±20 nm at the wavelength of 550 nm and the average tilt angle relative to the film plane is 10±5°, where ne and no are the extraordinary and ordinary refractive indices, respectively, and d, the thickness of the birefringent material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.