System to detect a power management system resume event from a stylus and touch screen
US6445383B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 1998 |
| Grant date | Sep 3, 2002 |
| Priority date | — |
| Expiry date | Feb 9, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/3262
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system to detect a power management system resume event from a stylus and touch screen. When an electronic device equipped with a touch screen display is within its quiescent low power state, the present invention enables an operator to activate it by touching a stylus or their finger to its touch screen display. Specifically, an embodiment in accordance with the present invention includes a comparator installed within an electronic touch screen device. While the electronic touch screen device is within its quiescent low power state, the comparator determines whether the touch screen display has been touched by comparing an output voltage signal transmitted by the touch screen display with a reference voltage signal. When the touch screen display is touched, the voltage of the output voltage signal becomes greater than the voltage of the reference voltage signal, causing the comparator to transmit a resume event signal. The resume event signal causes the electronic touch screen device to wake up from its quiescent low power state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.