Liquid crystal cells – elements and systems – Particular excitation of liquid crystal – Electrical excitation of liquid crystal
Patent
1998-11-17
1999-11-23
Sikes, William L.
Liquid crystal cells, elements and systems
Particular excitation of liquid crystal
Electrical excitation of liquid crystal
349139, 349141, G02F 1136, G02F 11343
Patent
active
059909870
ABSTRACT:
In a production process for a transverse electrical field type active matrix liquid crystal display apparatus, a photolithographic step is eliminated to reduce the cost. There are formed on an insulating substrate carrying thin-film transistors as switching elements, drain electrodes 31, drain bus lines 32 connected to the drain electrodes 31, source electrodes 33 and pixel electrodes 34 formed by the first low-resistance electrically conductive film 3. Islands are formed on the resulting assembly by a semiconductor film. There are further formed on the resulting product gate electrodes 61, gate bus lines 62 and counter electrodes 63. The gate electrodes 61, gate bus lines 62, counter electrodes 63 and the islands 71 can be formed by a sole photolithographic step to reduce the number of the photographic steps and hence the cost.
REFERENCES:
patent: 5760857 (1998-06-01), Yanagawa et al.
patent: 5831707 (1998-11-01), Ota et al.
patent: 5841498 (1998-11-01), Baur et al.
patent: 5841499 (1998-11-01), Baur et al.
patent: 5852485 (1998-12-01), Shimada et al.
Eisenhut Heidi L.
NEC Corporation
Sikes William L.
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