JPS5276897A - Half tone picture display device using liquid crystal matrix panel - Google Patents

Half tone picture display device using liquid crystal matrix panel

Info

Publication number
JPS5276897A
JPS5276897A JP15274175A JP15274175A JPS5276897A JP S5276897 A JPS5276897 A JP S5276897A JP 15274175 A JP15274175 A JP 15274175A JP 15274175 A JP15274175 A JP 15274175A JP S5276897 A JPS5276897 A JP S5276897A
Authority
JP
Japan
Prior art keywords
liquid crystal
display device
half tone
picture display
matrix panel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP15274175A
Other languages
Japanese (ja)
Inventor
Naotake Saito
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP15274175A priority Critical patent/JPS5276897A/en
Publication of JPS5276897A publication Critical patent/JPS5276897A/en
Pending legal-status Critical Current

Links

Landscapes

  • Liquid Crystal (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

PURPOSE: To reduce the number of logic operation circuits and make display of multiple tones by composing a half tone picture display device using a liquid crystal matrix panel with a device for generating reference pulse width signals of 1 : 2 : 4 .... : 2k in pulse width ratio and logic operation circuits combining these signals and the digital signals from a memory unit.
COPYRIGHT: (C)1977,JPO&Japio
JP15274175A 1975-12-23 1975-12-23 Half tone picture display device using liquid crystal matrix panel Pending JPS5276897A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15274175A JPS5276897A (en) 1975-12-23 1975-12-23 Half tone picture display device using liquid crystal matrix panel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15274175A JPS5276897A (en) 1975-12-23 1975-12-23 Half tone picture display device using liquid crystal matrix panel

Publications (1)

Publication Number Publication Date
JPS5276897A true JPS5276897A (en) 1977-06-28

Family

ID=15547134

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15274175A Pending JPS5276897A (en) 1975-12-23 1975-12-23 Half tone picture display device using liquid crystal matrix panel

Country Status (1)

Country Link
JP (1) JPS5276897A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5450289A (en) * 1977-09-27 1979-04-20 Sharp Corp Multi-gradation image display device
JPS6125194A (en) * 1984-07-13 1986-02-04 株式会社　アスキ− Display controller
US5121235A (en) * 1988-12-21 1992-06-09 International Business Machines Corporation Liquid crystal display device having light transmission control layer
US5764212A (en) * 1994-02-21 1998-06-09 Hitachi, Ltd. Matrix type liquid crystal display device with data electrode driving circuit in which display information for one screen is written into and read out from display memory at mutually different frequencies
US6094243A (en) * 1996-03-26 2000-07-25 Sharp Kabushiki Kaisha Liquid crystal display device and method for driving the same
US7479939B1 (en) 1991-02-16 2009-01-20 Semiconductor Energy Laboratory Co., Ltd. Electro-optical device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5450289A (en) * 1977-09-27 1979-04-20 Sharp Corp Multi-gradation image display device
JPS6125194A (en) * 1984-07-13 1986-02-04 株式会社　アスキ− Display controller
US5121235A (en) * 1988-12-21 1992-06-09 International Business Machines Corporation Liquid crystal display device having light transmission control layer
US7479939B1 (en) 1991-02-16 2009-01-20 Semiconductor Energy Laboratory Co., Ltd. Electro-optical device
US5764212A (en) * 1994-02-21 1998-06-09 Hitachi, Ltd. Matrix type liquid crystal display device with data electrode driving circuit in which display information for one screen is written into and read out from display memory at mutually different frequencies
US6094243A (en) * 1996-03-26 2000-07-25 Sharp Kabushiki Kaisha Liquid crystal display device and method for driving the same
US6229583B1 (en) 1996-03-26 2001-05-08 Sharp Kabushiki Kaisha Liquid crystal display device and method for driving the same

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