Image distortion correction apparatus capable of correcting misconvergence using an amplifier
US7129655B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 9, 2003 |
| Grant date | Oct 31, 2006 |
| Priority date | — |
| Expiry date | Mar 19, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/31
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image distortion correction apparatus is disclosed which can correct misconvergence using a D-class amplifier. The image distortion correction apparatus has an image processor for detecting an image signal and horizontal/vertical synchronous signals from a signal received from an external source; a distortion value calculator for calculating a misconvergence value occurring when the image signal is scanned based on the horizontal/vertical synchronous signals; a correction value calculator for calculating a convergence correction value of a pulse waveform to correct misconvergence of the image signal based on the misconvergence value; an amplifier for performing a D-class amplification with respect to the convergence correction value; and a convergence yoke fixed to a cathode ray tube (CRT) for controlling a path of an electron beam corresponding to the image signal based on the convergence correction value amplified in the amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.