Title:
LIQUID CRYSTAL DISPLAY ELEMENT AND PRODUCTION THEREOF
Document Type and Number:
Japanese Patent JPH04355726
Kind Code:
A
Abstract:
PURPOSE:To provide a panel having a good display grade by subjecting an oriented film to a rubbing treatment to orient the film at a uniform prefilt angle without having rubbing lines and to improve the production yield of the liquid crystal display element of an STN mode by introducing the measurement of the critical surface tension of the oriented film as the process control item of production since this measurement is a simple stage and is suitable for mass production. CONSTITUTION:Polyimide is applied on patterned ITO electrodes 8 and is cured, by which the polyimide oriented film 4 is formed. This oriented film is subjected to the rubbing treatment by specifying the critical surface tension ranging in a 30c to 45dyn/cm range as the evaluation quantity of the orientation state and thereafter, the panel is assembled and an STN liquid crystal compsn. 7 is injected into the panel, by which the liquid crystal display element is constituted.
Inventors:
KURAI HISAKO
MOCHIZUKI HIDEAKI
MOCHIZUKI HIDEAKI
Application Number:
JP13089991A
Publication Date:
December 09, 1992
Filing Date:
June 03, 1991
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
G02F1/133; G02F1/1337; (IPC1-7): G02F1/133; G02F1/1337
Attorney, Agent or Firm:
Akira Kobiji (2 outside)