Active matrix LED display driving circuit
US6975293B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2003 |
| Grant date | Dec 13, 2005 |
| Priority date | — |
| Expiry date | May 6, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An active matrix LED display driving circuit. The circuit comprises a first transistor having a drain, a source coupled to receive a data signal and a gate coupled to receive a scan signal and, a second transistor having a drain, a source coupled to receive the data signal and a gate coupled to receive the scan signal, a third transistor having a source, a drain coupled to the drain of the second transistor and a gate coupled to the drain of the first transistor, a fourth transistor having a drain coupled to receive a first voltage, and a gate coupled to receive the scan signal and a source coupled to the drain of the second transistor, a light emitting diode having an anode coupled to the source of the third transistor and a cathode coupled to receive a second voltage, and a capacitor coupled between the gate and source of the third transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.