Image misconvergence correction apparatus for less switching noise influence
US7158193B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 2003 |
| Grant date | Jan 2, 2007 |
| Priority date | — |
| Expiry date | Feb 24, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/28
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is an image misconvergence correction apparatus having a correction value generation unit for calculating a convergence correction value to correct misconvergence occurring when a video signal is scanned on a display device; an amplification unit for performing D-class amplification with respect to the convergence correction value; a convergence yoke mounted in the display device to control a path of electron beams corresponding to the video signal based on the convergence correction value amplified in the amplification unit; and a feedback sensing unit for differentially amplifying a voltage value for electric current passing through the convergence yoke, and feeding back the differentially amplified voltage value to the correction value generation unit. The misconvergence correction apparatus amplifies and outputs a convergence correction value through the D-class amplifier having excellent power consumption and heat generation characteristics, calculates the convergence correction value, and minimizes influence of switching noise outputted from the D-class amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.