Title:
THIN FILM TRANSISTOR TYPE LIQUID CRYSTAL DISPLAY DEVICE
Document Type and Number:
Japanese Patent JPH04318522
Kind Code:
A
Abstract:
PURPOSE:To prevent the light leak and deterioration of liquid crystal of a thin film transistor(TFT) type liquid crystal display by eliminating a DC component between a drain electrode and a counter electrode. CONSTITUTION:A shield electrode 7 is formed on the drain electrode 2 of a TFT across an insulating film. The shield electrode 7 is connected electrically to the counter electrode. Consequently, the shield electrode 7 and counter electrode are disconnected electrically by the shield electrode 6, so no DC component is generated between them. The liquid crystal on the drain electrode, therefore, does not turn ON so no light leak is caused. Further, no DC component is impressed to the liquid crystal, so the liquid crystal does not deteriorates.
Inventors:
OGURA SHIGEKI
NISHIKI TAMAHIKO
YOSHIZAWA YOSHIYO
NISHIKI TAMAHIKO
YOSHIZAWA YOSHIYO
Application Number:
JP8553591A
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; H01L29/78; H01L29/786; G02F1/1362; (IPC1-7): G02F1/133; G02F1/1343; G02F1/136; H01L29/784
Attorney, Agent or Firm:
Mamoru Shimizu (2 outside)