Method and system for detecting displayport source device connections to sink device
US8200855B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 2008 |
| Grant date | Jun 12, 2012 |
| Priority date | — |
| Expiry date | Apr 13, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2370/14
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods and systems are disclosed for detecting DisplayPort (DP) source device connection to sink devices. When the DP link is active, no measurements are made to determine source device connections. When a DP link is not active, a signal line for the auxiliary channel for a DP connection is measured to determine if a source device is connected. More particularly, the auxiliary channel is a differential auxiliary channel, and the positive signal line is measured to make the determination of whether a source device is connected. Still further, an indication is made that a source device is connected if the positive signal line is at a low level, and an indication is made that a source device is not connected if the positive signal line is at a high level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.