Liquid crystal display device achieving imaging with high S/N ratio using invisible light
US7701448B2 · kind B2 · utility
6Cited by
4References
2Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 2, 2007 |
| Grant date | Apr 20, 2010 |
| Priority date | — |
| Expiry date | Oct 20, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A liquid crystal panel brightness controller notifies a backlight controller that an illuminance of ambient light is equal to or less than a threshold value. Upon notification, the backlight controller causes invisible light emitted, for example. The invisible light passes through a liquid crystal panel and is reflected by an imaging target and is received by photosensors. Accordingly, the decrease in the amount of the visible light received by photosensors is compensated. As a result, an image with a high S/N ratio is obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.