Automated adaptation of the supply voltage of a light-emitting display according to the desired luminance
US7755580B2 · kind B2 · utility
3Cited by
14References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 13, 2004 |
| Grant date | Jul 13, 2010 |
| Priority date | — |
| Expiry date | Aug 13, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for regulating the biasing voltage of column control circuits of an array screen formed of LEDs distributed in lines and columns, the column control circuits being adapted to turning on at least one LED of a line. The method includes increasing the biasing voltage when the current flowing through at least one activated LED is smaller than a determined luminance current and of decreasing the biasing voltage when the current flowing through each activated LED is equal to the determined luminance current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.