Pixel circuit and electroluminescent display comprising the pixel circuit
US10431142B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 22, 2017 |
| Grant date | Oct 1, 2019 |
| Priority date | — |
| Expiry date | Nov 18, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K59/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A circuit includes an electroluminescent (EL) device, a transistor, a first capacitor and a second capacitor. The transistor, coupled between a supply voltage and the EL device, includes a gate coupled to a first node and a first terminal coupled to a second node. The first capacitor, coupled between the first node and the second node, is configured to reset the gate of the transistor to the supply voltage in response to a first control signal. The second capacitor, including a first end coupled to the second node and a second end to receive a second control signal, is configured to establish at the first terminal of the transistor a compensation voltage associated with a threshold voltage of the transistor in response to the second control signal. The transistor is configured to pass a current through the EL device. The current has a magnitude independent of the threshold voltage of the transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.