Liquid crystal display apparatus and monitor system having the same
US7692616B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 2006 |
| Grant date | Apr 6, 2010 |
| Priority date | — |
| Expiry date | Aug 28, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/041
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A liquid crystal display apparatus includes a liquid crystal panel having a matrix of pixels, a control circuit, and a temperature sensor. The temperature sensor directly or indirectly detects a temperature of the liquid crystal panel. The control circuit reverses a polarity of a voltage applied to each pixel at a time interval variable with the detected temperature, while keeping a field frequency constant. The time interval is a positive integer multiple of the reciprocal of a field frequency, i.e., a positive integer multiple of a field period. When the temperature of the liquid crystal layer is low, the control circuit reverses the polarity of the voltage at a longer time interval. In contrast, when the temperature of the liquid crystal layer is high, the control circuit reverses the polarity of the voltage at a shorter time interval.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.