Title:
THIN FILM TRANSISTOR TYPE LIQUID CRYSTAL DISPLAY DEVICE
Document Type and Number:
Japanese Patent JPH04318523
Kind Code:
A
Abstract:
PURPOSE:To eliminate a DC component between the drain electrode and counter electrode of a thin film transistor(TFT) type liquid crystal display and to reduce a drop in picture element electrode due to the parasitic capacity between the gate and source. CONSTITUTION:A shield electrode is formed over the entire surface of the drain electrode 2 of the TFT except the connection part between the source electrode 4 and picture element electrode 5 across an insulating film. Then the shield electrode 7 is connected electrically to a counter electrode. Consequently, the drain electrode 2 and counter electrode are disconnected electrically by the shield electrode, so no DC component is generated between them. Further, accumulation capacity is formed between the picture element electrode 5 and shield electrode, so the drop in picture element electrode voltage due to the parasitic capacity between the gate and source is reduced.
Inventors:
OGURA SHIGEKI
NISHIKI TAMAHIKO
YOSHIZAWA YOSHIYO
NISHIKI TAMAHIKO
YOSHIZAWA YOSHIYO
Application Number:
JP8555491A
Publication Date:
November 10, 1992
Filing Date:
April 17, 1991
Export Citation:
Assignee:
OKI ELECTRIC IND CO LTD
International Classes:
G02F1/133; G02F1/1343; G02F1/136; G02F1/1368; H01L21/336; H01L27/12; H01L29/78; H01L29/786; (IPC1-7): G02F1/133; G02F1/1343; G02F1/136; H01L27/12; H01L29/784
Attorney, Agent or Firm:
Mamoru Shimizu (2 outside)