Active matrix electroluminescent display devices
US8130173B2 · kind B2 · utility
8Cited by
1References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 20, 2004 |
| Grant date | Mar 6, 2012 |
| Priority date | — |
| Expiry date | Jan 16, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/043
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Each pixel of an active matrix electroluminescent display device has a first amorphous silicon drive transistor for intermittently driving a current through the display element and a second amorphous silicon drive transistor for intermittently driving a current through the display element. The aging effect of amorphous silicon TFTs can be reduced by sharing the driving of the display element between two drive transistors. Providing a duty cycle reduces the on-time for each drive transistor, but also provides a period during which there can be some recovery of the TFT characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.