Automatic activity detection in a display controller
US7477244B2 · kind B2 · utility
4Cited by
13References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2005 |
| Grant date | Jan 13, 2009 |
| Priority date | — |
| Expiry date | Aug 23, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/022
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Detecting when the on-board power supply is powered on or off by an auto activity detection circuit by determining if the reference clock signal (TCLK) is toggling and if the reference clock signal is toggling, then charging a capacitor to a high voltage in the auto activity detection circuit based on the toggling reference clock signal, and outputting an on-board power supply activity signal based upon the high voltage by the auto activity detection circuit indicative of whether or not the on-board power supply is active.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.