Driving circuit and method for light emitting device
US6680580B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 5, 2002 |
| Grant date | Jan 20, 2004 |
| Priority date | — |
| Expiry date | Nov 5, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2310/0251
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A driving circuit for a light emitting device is suitable for use in an active matrix organic light emitting diode (AMOLED) display, which has a scanning line to be input with a scanning clock signal, so as to control the driving circuit. The driving circuit includes a driving circuit main part which includes a light emitting device driven by a driving transistor as well as a scan line connection terminal and a data line connection terminal. The scan line connection terminal receives a scanning clock signal. A first transistor has a gate connected to this scan line connection terminal, a source. connected to the data line connection terminal, and a drain connected to a gate electrode of the driving transistor. A second transistor has a gate electrode connected to the scan line connection terminal, a source connected to a common voltage, and a drain connected to an anode of the light emitting device. The common voltage has a high voltage level and a low voltage level, alternating by a frequency, wherein the high voltage level of the common voltage is higher than a system low voltage and the low voltage level is smaller than the system low voltage. When the first transistor and the s…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.