Electro-optical device, electronic apparatus, and projector
US11994774B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 2022 |
| Grant date | May 28, 2024 |
| Priority date | — |
| Expiry date | May 30, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B33/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In an electro-optical device, a first polarizing element, a first phase difference element, a transmissive liquid crystal panel, a second phase difference element, and a second polarizing element are sequentially arranged. Here, when a phase difference of the first phase difference element and the second phase difference element is λ/4, an influence of orientation disorder of liquid crystal molecules can be alleviated, but a contrast ratio is reduced. Therefore, when a wavelength of incident light is λ, a phase difference R of the first phase difference element and the second phase difference element satisfies the following condition that 0<R<λ/4, preferably λ/12<R<λ/6. For example, it is assumed that the phase difference R is λ/8.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.