Detector for detecting pseudo-contour noise and display apparatus using the detector
US6414657B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1999 |
| Grant date | Jul 2, 2002 |
| Priority date | — |
| Expiry date | Aug 5, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/145
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention provides a detector to detect pseudo-contour noise that appears when gradation display is performed in the subfield method on the display apparatus such as a plasma display panel. The invention also provides a display apparatus which makes use of the detector. The detector detects the probability of pseudo-contour noise appearance as a noise quantity (MPD value), which comprises an MPD calculator to calculate the MPD value, an exclusion area detector to detect an area in which diffusion processing is not performed; and a subtractor to remove an exclusion area from an area for which the MPD value has been determined. The display apparatus comprises the detector and a noise diffussing device to reduce appearance of pseudo-contour noise based on the MPD value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.