Multilayered optical film, manufacturing method thereof, and display device
US9921351B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 10, 2013 |
| Grant date | Mar 20, 2018 |
| Priority date | — |
| Expiry date | Oct 31, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2307/40
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An optical film includes: a polarization layer; a first phase retardation layer having an optic axis at an angle in a range from about 17 degrees to about 27 degrees or from about −27 degrees to about −17 degrees with respect to a transmission axis of the polarization layer; and a second phase retardation layer having an optic axis at an angle in a range from about 85 degrees to about 95 degrees with respect to the transmission axis of the polarization layer. The polarization layer, the first phase retardation layer, and the second phase retardation layer are deposited in sequence, the first phase retardation layer is a half-wave plate, the second phase retardation layer is a quarter-wave plate, and out-of-plane retardation values of the first phase retardation layer and the second phase retardation layer for incident light having the standard wavelength have opposite signs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.