Image display device having a set period during which a step signal is supplied at different levels to provide a uniform display
US8207918B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 9, 2009 |
| Grant date | Jun 26, 2012 |
| Priority date | — |
| Expiry date | Sep 18, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/043
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
During a first period of a set period, a reset switch element of each pixel is turned on to converge a voltage at a control electrode of a TFT to a predetermined voltage, and a step signal having a first voltage level is supplied from a step signal generation circuit. During a second period of the set period, the reset switch element is turned off, and a step signal having a second voltage level is supplied from the step signal generation circuit, whereby a voltage exceeding a second power supply voltage or a voltage exceeding a voltage range supplied from a signal driver section is input as a characteristic value set voltage to the control electrode. Accordingly, even when a relationship between a gate voltage and a drain current of the thin film transistor exhibits a hysteresis characteristic, uniform display can be achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.