Video device capable of detecting connection to display devices
US8451378B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 16, 2009 |
| Grant date | May 28, 2013 |
| Priority date | — |
| Expiry date | Feb 5, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/021
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A video device to generate analog video signals to a plurality of display devices comprises a video processing chip, a plurality of video output interface circuits and a plurality of detection circuits. The video processing chip converts input video data into the analog video signals and comprises at least one video decoder and a plurality of analog to digital convertors. The video output interface circuit transmits the analog video signals to the plurality of display devices. The detection circuit detects voltage of horizontal sync signals of the analog video signals to determine connection of the video output interface circuit to the display device, and generates a feedback signal to the video processing chip to control the video decoder and the analog to digital convertor accordingly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.