Title:
LIQUID CRYSTAL DISPLAY DEVICE
Document Type and Number:
Japanese Patent JPH01193716
Kind Code:
A
Abstract:
PURPOSE:To decrease the number of constitution dots of one display picture element and to make a half-tone display by dividing minimum display picture elements which constitute a picture plane into plural dots which differ in area ratio and turning on and off the dots. CONSTITUTION:An electrode of one display picture element of a liquid crystal panel is divided unequally into irregular electrodes 1a-1c. For an N-half-tone display, N combinations of the unequally divided electrodes 1a-1c are considered so that a total electrode area ratio of each combination to the total area of one display picture element electrode is an equal interval, i.e. an integral multiple. Therefore, N kinds of the area of one display picture element in the on state of the electrode are prepared by making the intervals of the area variation equal. Consequently, the on electrode area ratio of one display picture element is controlled to make the N-half-tone display.
Inventors:
MANO HIROYUKI
KONUMA SATOSHI
KARASAWA NORIYUKI
KONUMA SATOSHI
KARASAWA NORIYUKI
Application Number:
JP1709788A
Publication Date:
August 03, 1989
Filing Date:
January 29, 1988
Export Citation:
Assignee:
HITACHI LTD
HITACHI VIDEO ENG
HITACHI VIDEO ENG
International Classes:
G02F1/133; G02F1/1343; G09G3/36; (IPC1-7): G02F1/133; G09G3/36
Attorney, Agent or Firm:
Katsuo Ogawa (1 person outside)