Method for VCOM level adjustment with integrated programmable resistive arrays
US7460047B2 · kind B2 · utility
6Cited by
10References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 1, 2007 |
| Grant date | Dec 2, 2008 |
| Priority date | — |
| Expiry date | Aug 1, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/68
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A calibrator circuit and method for VCOM voltage adjustment for an LCD includes using integrated programmable resistive arrays. The method uses two DACs and three integrated circuit arrays to provide all of the advantages of VCOM calibrator circuits using external resistive voltage-dividers. The integrated circuit resistor arrays reduce the number of external components and PCB space. The method used is suitable for higher resolution adjustment of the VCOM voltage and no calculation is required in the whole adjustment procedure, which saves labor cost, time and enables automation of the calibrator fabrication.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.