Active matrix led pixel driving circuit
US6891520B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 3, 2002 |
| Grant date | May 10, 2005 |
| Priority date | — |
| Expiry date | Jun 18, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0233
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A circuit for driving active matrix LED pixels, having a capacitor, a light emitting diode, and a first and second transistor. The capacitor is connected between a gate and source of the first transistor, and the second transistor has a source connected to a drain of the first transistor and a gate connected to receive a first voltage by which the first and second transistor operates in a saturation region, and a current switch controlled by a scan signal, wherein a first current corresponding to a data signal flows through the first and second transistor to generate a second voltage stored on the capacitor when the current switch is closed, and a second current through the first and second transistor is generated by the second voltage stored on the capacitor to turn on the light emitting diode when the current switch is opened.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.