Electroluminescent display with efficiency compensation
US8228267B2 · kind B2 · utility
2Cited by
5References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 29, 2008 |
| Grant date | Jul 24, 2012 |
| Priority date | — |
| Expiry date | May 9, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0693
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electroluminescent (EL) subpixel having a readout transistor is driven by a current source when the drive transistor is non-conducting. This produces an emitter-voltage signal from which an aging signal representing the efficiency of the EL emitter can be computed. The aging signal is used to adjust an input signal to produce a compensated drive signal to compensate for changes in efficiency of the EL emitter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.