Display apparatus driving circuitry
US7773051B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 16, 2004 |
| Grant date | Aug 10, 2010 |
| Priority date | — |
| Expiry date | Oct 3, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/2932
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display apparatus driving circuitry for driving a plasma display panel. A first transistor is electrically connected between an output terminal and a high-voltage power supply terminal. A second transistor is connected between the output terminal and a reference power supply terminal. A buffer circuit supplies a voltage lower than a low voltage VDL for logic to a gate of the second transistor to make a drop in an output waveform gradual during an address electrical discharge. In a preferred embodiment, during this drop in the output waveform, a p-channel type MOSFET of the buffer circuit is turned on, whereby the VDL is suppressed due to a back gate effect. Therefore, a signal at a potential lower than the VDL is inputted to the gate of the second transistor. As a result, the drop in the second transistor output waveform is gradual, so that noise and damage are prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.