Automatic adaptation of the supply voltage of an electroluminescent display according to the desired luminance
US7911424B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2005 |
| Grant date | Mar 22, 2011 |
| Priority date | — |
| Expiry date | Jul 2, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A device for regulating the bias voltage of circuits for controlling columns of a matrix display capable of selecting columns to turn on the light-emitting diodes of the selected columns and of a selected line, the device including a first measurement circuit providing a first measurement signal representative of the highest voltage among the voltages of the selected columns; a second measurement circuit providing a second measurement signal representative of the lowest voltage among the voltages of the selected columns; and an adjustment circuit receiving the first and second measurement signals and capable of decreasing the bias voltage if the first measurement signal is smaller than a first comparison signal and of increasing the bias voltage if the second measurement signal is greater than a second comparison signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.