Thin-film transistor circuit
US4621260A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1983 |
| Grant date | Nov 4, 1986 |
| Priority date | — |
| Expiry date | Dec 21, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0219
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A thin-film transistor circuit used to drive a liquid crystal display device is disclosed, which circuit includes a plurality of circuit components which are arranged in the form of a matrix as to be connected with data lines for supplying an image signal and with address lines for supplying a gate pulse signal, whereby the circuit components control the picture element display in the unit picture element region of the LCD device. Each circuit component has a capacitor connected to the unit picture element region for temporarily storing the image signal, and a TFT transfer gate having a gate electrode connected to one of the address lines, a source electrode connected to one of the data lines, and a drain electrode connected to the capacitor. The transfer gate performs the switching operation in response to the gate pulse signal, thereby transferring the image signal to the capacitor. A compensating pulse signal which is synchronized with the gate pulse signal and has a polarity opposite to that of the gate pulse signal is applied to the capacitor, thereby preventing a decrease in the image signal voltage across this capacitor due to the parasitic capacitance component existing in …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.