Liquid crystal shutter array having microlenses corresponding to the pixel electrodes
US4836652A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Nov 13, 1987 |
| Grant date | Jun 6, 1989 |
| Priority date | — |
| Expiry date | Nov 13, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133526
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A liquid crystal shutter array requiring no separate focusing lens system. Microlenses for focusing the light incident upon a matrix of pixel electrodes are formed in a transparent substrate of the shutter assembly. A refractive index of light of each of the microlenses is set in a manner such that the incident angle .theta. of the light incident on the liquid crystal of the shutter through the microlenses satisfies; ##EQU1## where P, a, and d respectively represent the size of each of the photomasks, the length of a portion wherein each of the photomasks and corresponding ones of the pixel electrodes overlap, and the thickness of the transparent substrate on the light output side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.