Active matrix type liquid crystal display apparatus with a proje

Details Active matrix type liquid crystal display apparatus with a proje Active matrix type liquid crystal display apparatus with a proje

1995-08-28

1998-07-07

Gross, Anita Pellman

Liquid crystal cells, elements and systems

Particular excitation of liquid crystal

Electrical excitation of liquid crystal

349 43, 349 46, G02F 1136

Patent

active

057777039

ABSTRACT:
In an active matrix type liquid crystal display apparatus, a thin film transistor of staggered type is formed in the vicinity of the intersection of the gate line and the drain line. Moreover, in the above mentioned vicinity of the intersection of the drain line, a projection part extending in the longitudinal direction of the gate line is provided. This projection part functions essentially as the drain electrode. The confronting region, where the source electrode, the drain electrode and the projection part confront each other, is covered by the gate electrode constituting a part of the gate line. By providing the projection part in the drain line, and hence also forming the channel region in the confronting region of the source electrode and the projection part, this channel region becomes an isolated composition within the thin film transistor. Therefore, a parasitic channel is prevented from forming between the source electrode of the pixel on one side, and the drain electrode of another pixel on the other side, and this parasitic channel is prevented from conducting electricity.

REFERENCES:
patent: 4563806 (1986-01-01), Coissard et al.
patent: 4783147 (1988-11-01), Maurice et al.
patent: 5003356 (1991-03-01), Wakai et al.
patent: 5055899 (1991-10-01), Wakai et al.
patent: 5508591 (1996-04-01), Kanemori et al.

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