Phase difference compensation element, liquid crystal display device and projection type image display device
US11269218B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 29, 2019 |
| Grant date | Mar 8, 2022 |
| Priority date | — |
| Expiry date | Feb 14, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/006
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Provided is a phase difference compensation element that can improve a contrast of a liquid crystal display device and has durability while suppressing an increase in cost and prolongation of lead time. The phase difference compensation element is formed so that, when an optical anisotropic layer is formed on a substrate, the optical anisotropic layer includes a plurality of birefringent films, and a direction of a combined vector obtained by combining respective vectors of the birefringent films when determining a vector with a direction of a line segment obtained by projecting a film formation direction of each birefringent film on a surface of a transparent substrate and a thickness, is substantially the same as a direction of a line segment obtained by projecting a liquid crystal molecule constituting a liquid crystal cell on the surface of the transparent substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.