Voltage based data driving circuits and driving methods of organic light emitting displays using the same
US7893897B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 25, 2006 |
| Grant date | Feb 22, 2011 |
| Priority date | — |
| Expiry date | Sep 16, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/043
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A data driving circuit for driving pixels of a light emitting display to display images with uniform brightness may include a gamma voltage unit that generates a plurality of gray scale voltages, a digital-analog converter that selects, as a data signal, one of the plurality of gray scale voltages using first data, a decoder that generates second data using the first data, a current sink, a voltage controller that controls a voltage value of the data signal using the second data and a compensation voltage generated based on the predetermined current, and a switching unit that supplies the data signal to the pixel during any partial period of the complete period elapsing after the first partial period. The current sink receives a predetermined current from the pixel during a first partial period of a complete period for driving the pixel based on the selected gray scale voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.