Liquid crystal display (LCD) contrast control system and method
US6496177B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 24, 2000 |
| Grant date | Dec 17, 2002 |
| Priority date | — |
| Expiry date | Feb 24, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/066
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A liquid crystal display (LCD) device temperature compensation control system and associated methodologies that controls the contrast voltage provided to the LCD device based on the ambient temperature to enable the LCD to display data beyond the normal, manufacturer-specified operational temperature range. The LCD contrast ratio is dependent upon ambient temperature and contrast voltage. The invention controls the contrast voltage supplied to the LCD device such that it operates in either a standard or extended operating range based on ambient temperature to achieve an optimum contrast ratio. The invention may also adjust the frame rate and/or data inversion state of the displayed data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.