Circuit and method for indicating image adjustment pattern using OSD
US6307596A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 27, 1998 |
| Grant date | Oct 23, 2001 |
| Priority date | — |
| Expiry date | May 27, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2340/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A circuit and method for indicating an image adjustment pattern using an on-screen display (OSD), includes: a microcomputer for selectively generating a free running frequency or converting the free running frequency into a standard mode frequency and generating a frequency output and video data according to the frequency converted; an OSD control circuit for receiving the frequency output from the microcomputer, and generating an OSD gain signal in accordance with a signal cable check request and an image adjustment pattern OSD gain signal according to the frequency output; a signal processing circuit for receiving and processing the video data according to the frequency output from the microcomputer, and thus outputting a video signal; and a video mixer for mixing the video signal output from the signal processing circuit and the OSD gain signal selectively output from the OSD control circuit, and outputting a signal cable check request video signal and an image adjustment pattern video signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.