Voltage based data driving circuit, light emitting display using the same, and method of driving the light emitting display
US7911427B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 25, 2006 |
| Grant date | Mar 22, 2011 |
| Priority date | — |
| Expiry date | Oct 11, 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 current sink that is capable of receiving, via a data line, a predetermined current from a pixel to enable the data driving circuit to generate a compensation voltage for the pixel. The compensation voltage may compensate for variations among the pixels of the display. Variations among the pixels may result from different electron mobilities and/or threshold voltages of transistors included in the pixels. The value of the predetermined current may be equal to or higher than a value of a minimum current employable by the pixel to emit light of maximum brightness. The maximum brightness of the pixel may correspond to a brightness emitted by the pixel when a highest one of a plurality of set gray scale voltages is applied to the pixel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.