Liquid crystal display device, image signal correction circuit, image signal correction method, and electronic devices
US6864866B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 28, 2001 |
| Grant date | Mar 8, 2005 |
| Priority date | — |
| Expiry date | Nov 30, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0214
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A liquid crystal display device of the present invention includes a subtracter that calculates the difference between an image signal and a reference signal. The image signal has information corresponding to the density of a pixel arranged in a matrix extending in row and column directions and being supplied in synchronization with horizontal scanning in the row direction and vertical scanning in the column direction. The reference signal has information corresponding to a reference density. The liquid crystal display device also includes a first accumulator group and a second accumulator group that accumulate the difference for each column for one vertical scanning period; and an adder that adds a value corresponding to an accumulated value associated with a column to the image signal, DV, of the column for correction. With this arrangement, the deterioration of display quality caused by vertical cross-talk is reduced, minimized or resolved by correcting the image signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.