Level shift circuit, display apparatus, and portable terminal
US7224200B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 2003 |
| Grant date | May 29, 2007 |
| Priority date | — |
| Expiry date | Jun 2, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2310/0294
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In the structure in which an input signal IN and a reverse-phase signal XIN thereof are externally input, an external IC is required for generating the reverse-phase signal XIN, and the number of required input signal terminals is two.A level shift circuit formed on an insulating substrate, such as a glass substrate, using transistors with large characteristic variations, for example, TFTs with high thresholds Vth, includes a complementary generator unit (11) driven by a first power supply (VCC) having an amplitude voltage equal to the amplitude voltage of a signal externally input from the substrate to generate complementary signals from a single-phase input signal IN. The complementary signals generated by the complementary generator unit (11) are level-shifted by a level shift unit (14). Therefore, it is no longer necessary to externally input the reverse-phase signal XIN.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.