Level converter circuit and a liquid crystal display device employing the same
US7408544B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 22, 2005 |
| Grant date | Aug 5, 2008 |
| Priority date | — |
| Expiry date | Feb 1, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2310/0289
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display device includes a pixel driver circuit. Each of level converter circuits in the pixel driver circuit has: an input terminal supplied with a signal swinging between a first voltage and a second voltage lower than the first voltage; a first first-conductivity-type transistor having a gate electrode coupled to the input terminal, and a source region coupled to ground; a second second-conductivity-type transistor having a gate electrode coupled to a drain region of the first transistor, a source region coupled to a power supply, and a drain region coupled to an output terminal; one circuit element among a diode, a resistor and a fourth second-conductivity-type transistor, coupled between the gate electrode of the second transistor and the power supply; a third first-conductivity-type transistor having a source region coupled to the input terminal, a drain region coupled to the output terminal, and a gate electrode supplied with a dc voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.