Threshold voltage compensation method for electroluminescent display devices
US7719492B2 · kind B2 · utility
13Cited by
4References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 4, 2005 |
| Grant date | May 18, 2010 |
| Priority date | — |
| Expiry date | Apr 10, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/043
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An active matrix electroluminescent display device has a shorting transistor (30) connected between the gate and drain of the drive transistor (22). Means (42) is provided for measuring a voltage on the data line (6). The shorting transistor (30) can be used to discharge the voltage on the gate of the drive transistor (22) until it switches off. By storing the resultant voltage on the data line (6) through an address transistor (16), the data line is used as one of the control/measurement lines for the threshold measurement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.