Dual output voltage system with charge recycling
US7907116B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 3, 2007 |
| Grant date | Mar 15, 2011 |
| Priority date | — |
| Expiry date | Dec 24, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/028
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A drive system for a display having segment and common lines is provided. The system may include a first charge pump; a first storage capacitor coupled to the first charge pump at a first pumped voltage level; a second charge pump, including an input terminal coupled to the first storage capacitor; and a second storage capacitor coupled to a pump output terminal at the second pumped voltage level. The system may also include a controller coupled to the first and second storage capacitors, coupled to segment and common lines of an associated display; and a control circuit operating a plurality of switching devices to selectively connect the segment output terminal to the first and second storage capacitors to supply charge to the segment output terminal during a first phase and to return charge from the segment output terminal to the second storage capacitor during a second phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.