Threshold voltage adjustment in thin film transistors
US7564291B2 · kind B2 · utility
4Cited by
2References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 21, 2005 |
| Grant date | Jul 21, 2009 |
| Priority date | — |
| Expiry date | Apr 21, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K19/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A thin film transistor circuit has a main thin film transistor (10), a control input (12) for controlling the operation of the main thin film transistor and a threshold adjustment capacitor (14) connected between the control input and the gate of the main thin film transistor. A charging circuit (16, 18) is used for charging the threshold adjustment capacitor to a desired threshold adjustment voltage. The circuit is used to affect a voltage shift to the voltage applied to the control input. This effectively implements a threshold voltage change by altering the relative voltages on the main transistor gate and the control input.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.