Optical compensation film
US9188786B2 · kind B2 · utility
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22Claims
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Key dates
| Filing date | Nov 30, 2012 |
| Grant date | Nov 17, 2015 |
| Priority date | — |
| Expiry date | Apr 27, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2300/0491
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical compensation film includes: a first layer having positive birefringence; a second layer on the first layer and having negative birefringence; and a third layer on the second layer and having positive birefringence. A retardation value of the optical compensation film for incident light having a wavelength of about 550 nm is about 135 nm to about 145 nm, and a ratio of a thickness of the first layer or of the third layer to a thickness of the second layer is about 1.1 to 2.2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.