Automatic adaptation of the precharge voltage of an electroluminescent display
US8044892B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2005 |
| Grant date | Oct 25, 2011 |
| Priority date | — |
| Expiry date | Jun 18, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A circuit for controlling a matrix display formed of light-emitting diodes, capable of successively selecting lines of the screen and, for each line from a set of selected lines, of selecting columns, the voltage of each selected column settling at an operating voltage. The circuit is capable, before selection of each line from said set of lines, of precharging at least the columns to be selected to a precharge voltage. The circuit includes a device for adjusting the precharge voltage including a measurement circuit capable, on each selection of a line from said set of lines, of measuring the maximum operating voltage from among the operating voltages of the selected columns; a circuit capable of storing the maximum measured operating voltage; and a circuit capable of adjusting the precharge voltage based on the maximum stored operating voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.