Color liquid crystal display device having a light scattering plate and light blocking members
US5132830A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 1990 |
| Grant date | Jul 21, 1992 |
| Priority date | — |
| Expiry date | Dec 19, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2201/305
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a color liquid crystal display device of the invention, light-blocking members of predetermined configurations (characters, graphics etc.) are disposed on the surface of one side of a liquid crystal display element, that is to say the surface on the side opposite to the light source, and the predetermined configurations are displayed on the color liquid crystal display device by blocking the light from the light source with the light-blocking members. Further, a light-scattering plate is disposed between the light source and the liquid crystal display element, or between the liquid crystal display element and the light-blocking members. It is possible to allow transmission of a part of the light blocked by the light-blocking members by scattering the light which is transmitted through the liquid crystal display element with the arrangement of the light-scattering plate. Therefore, around the periphery of the light-blocking members, the color balance of the transmitted light breaks down and only a specific color of light is transmitted, thereby preventing the colored and blurred appearance of the peripheral part of the light-blocking members. Based upon this, the display quality …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.