Device for driving luminescent display panel
US6841948B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 22, 2003 |
| Grant date | Jan 11, 2005 |
| Priority date | — |
| Expiry date | Sep 22, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/043
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Provided is a device for driving an active matrix type luminescent display panel, which can effectively apply a reverse bias voltage to a luminescent element via a drive TFT. A luminescent element 14 constituting one pixel 10 is light-up driven by a control TFT 11 and a drive TFT 12. A serial circuit of the drive TFT 12 and the luminescent element 14 is connected to a power source circuit via a switch S1 and a switch S2, whereby a state where a forward-directional current is supplied to the luminescent element or a state where a reverse bias voltage is applied to the luminescent element is selected. By using, as the control TFT 11 and the drive TFT 12, TFT of the channel type of that is the same, it is possible to maintain the drive TFT 12 to be in an “on” state when having applied a reverse bias voltage to the luminescent element 14. By doing so, it becomes possible to effectively apply a reverse bias voltage to the luminescent element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.