Display device and method for driving same
US9336718B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2013 |
| Grant date | May 10, 2016 |
| Priority date | — |
| Expiry date | Apr 30, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/045
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a pixel circuit, during a period during which an organic EL element is not emitting light, a transistor is in an “on” state and a reverse-direction voltage determined by a reverse-direction current that depends on the degree to which degradation of the organic EL element has progressed is written to a capacitor. The transistor then turns off, another transistor turns on, and a compensating current that depends on the reverse-direction voltage flows from another capacitor towards a reverse-biasing power-supply line, causing a drive voltage maintained by the capacitor to change by a compensating voltage change. This makes it possible to minimize decreases in the emission luminance of an electro-optical element such as an organic EL element due to degradation thereof over time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.