Apparatus for maintaining average screen light level for ferroelectric liquid crystal display
US6603104B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 5, 2000 |
| Grant date | Aug 5, 2003 |
| Priority date | — |
| Expiry date | Feb 16, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0673
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for maintaining the average light level of a screen for a ferroelectric liquid crystal display (LCD) is provided. The apparatus for maintaining the average light level of a screen for a ferroelectric liquid crystal display (LCD), includes an average light level detector for detecting the average light level of an input signal, using a predetermined pixel value of the input signal, a system controller for providing a predetermined reference average light level, and a screen light adjuster for receiving a reference average light level provided by the average light level of the input signal output from the average light level detector and the reference average light level provided by the system controller, adjusting the light of a screen so that the difference between the average light level of the input signal and the reference average light level is reduced, and keeping the average light level of the screen uniform. According to the above apparatus, it is possible to keep the light of a screen uniform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.