Level shifter circuit and display driver circuit
US8598934B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 18, 2011 |
| Grant date | Dec 3, 2013 |
| Priority date | — |
| Expiry date | Feb 27, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2310/027
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A level shifter circuit includes a first voltage conversion circuit and a second voltage conversion circuit. The first voltage conversion circuit receives an input signal having an amplitude ranging between a power supply potential (GND) and a power supply potential (VDDL), a power supply potential (VDDH) which is higher than the power supply potential (VDDL) is supplied. Further, a current limiting circuit is provided that limits a current supplied from a power supply line of the power supply potential (VDDH), and outputs a voltage signal with a larger amplitude than that of the input signal according to the input signal. The second voltage conversion circuit is supplied with the power supply potential (VDDH, and outputs an output signal with an amplitude ranging between the power supply potential GND and the power supply potential (VDDH).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.