Driver circuit of AMOLED with gamma correction
US7880692B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 9, 2007 |
| Grant date | Feb 1, 2011 |
| Priority date | — |
| Expiry date | Aug 27, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0673
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A driver circuit of an AMOLED (active matrix organic light emitting diode) with gamma correction includes a voltage selector, an operational amplifier, a MOS transistor, and a resistive element. The voltage selector selects one of a plurality of gamma voltages. The operational amplifier receives the selected gamma voltage and a feedback signal to generate a control signal. The MOS transistor provides the feedback signal and conducts a current associated with a current type pixel circuit in response to the control signal. The resistive element is coupled to a first voltage end and an inverted input end of the operational amplifier for determining the current with the selected gamma voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.