Liquid crystal display apparatus, image signal correction circuit, and electronic apparatus
US6930662B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 4, 2001 |
| Grant date | Aug 16, 2005 |
| Priority date | — |
| Expiry date | Aug 23, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0209
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A subtractor obtains a difference between an image signal, which is supplied in accordance with horizontal scanning and vertical scanning, and which carries information corresponding to a gray level of a pixel and a reference signal Ref representing a predetermined gray level. The result is integrated by an integrator on a horizontal scanning basis, multiplied with an appropriate coefficient, generating a correction signal Igr, which simulates the voltage variation of an opposing electrode, a capacitor line, etc. The correction signal Igr is added to the original image signal VID, and a corrected image signal VID′ is supplied to a liquid crystal panel. Thus, a voltage to which the voltage variation of the opposing electrode is added is applied to a pixel electrode, canceling the voltage variation of the opposing electrode, preventing degradation of the display quality due to horizontal crosstalk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.