Thin-film transistor circuit

Details Thin-film transistor circuit Thin-film transistor circuit

1983-12-21

1986-11-04

Brigance, Gerald L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340805, G09G 302

Patent

active

046212604

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 the thin-film transistor.

REFERENCES:
patent: 4140945 (1979-02-01), Trogdon
patent: 4413256 (1983-11-01), Yasuda et al.
patent: 4471347 (1984-09-01), Nakazawa et al.
patent: 4532506 (1985-07-01), Kitazina et al.
IEEE Conference Record of 1980 Biennial Display Research Conference, 21st-23rd Oct. 1980, Cherry Hill, New York, pp. 111-113 IEEE, New York, US, F. C. Luo et al.: "A Low-Leakage-Current Thin-Film Transistor for Flat-Panel Display, *pp. 111-112*.
Proceedings of the SID, vol. 19, No. 2, Sep. 1978, pp. 63-67; F. C. Luo et al.: "Alphanumeric and Video Performance of a 6"X 6"30 Lines Per Inch Thin Film Transistor-Liquid Crystal Display Panel" *pp. 63-64*.
Computer Design, vol. 12, No. 9, Sep. 1973, pp. 48-50; "Increased Address Rate Achieved in Liquid Crystal Panel Display *Whole Article*.
Electronic Engineering, vol. 54, No. 662, Feb. 1982, pp. 38-53, London, GB; C. M. Boardman, et al.: "Future Flat displays the Liquid Crystal Answer *pp. 48,51*.
1982 SID International Symposium Digest of Technical Papers, vol. 13, p. 186; E. Lueder et al.; May 11, 1982.
1982 SID International Symposium Digest of Technical Papers, vol. 13, p. 34; M. Matsuura et al; May 11, 1982.

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