JPS5490933A - Integrated circuit device having liquid crystal display unit driving circuit - Google Patents

Integrated circuit device having liquid crystal display unit driving circuit

Info

Publication number
JPS5490933A
JPS5490933A JP15994077A JP15994077A JPS5490933A JP S5490933 A JPS5490933 A JP S5490933A JP 15994077 A JP15994077 A JP 15994077A JP 15994077 A JP15994077 A JP 15994077A JP S5490933 A JPS5490933 A JP S5490933A
Authority
JP
Japan
Prior art keywords
resistors
levels
liquid crystal
display unit
crystal display
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.)
Granted
Application number
JP15994077A
Other languages
Japanese (ja)
Other versions
JPS606520B2 (en
Inventor
Masataka Hirasawa
Toshiaki Kobayashi
Akira Hashimoto
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP15994077A priority Critical patent/JPS606520B2/en
Publication of JPS5490933A publication Critical patent/JPS5490933A/en
Publication of JPS606520B2 publication Critical patent/JPS606520B2/en
Expired legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To perform test evaluation of high reliability, by splitting the voltage between two power supplies into a plurality of levels of low output impedance with the second resistor of a plurality at first, making non-conductive the second resistor, and making the levels into a plurality of output levels of high output impedance.
CONSTITUTION: A plurality of resistors 2...5 are connected in series between the two power supplied VDD and VSS. The resistors 7,9,11,13 respectively in parallel connection with the resistors 2...5 lower in resistance value are provided, and the switching elements 6,8,10,12 interrupting the current flowing to the resistors 7, 9,11,13 are connected. The liquid crystal display unit 18 splits the voltage between the power supplies VDD and VSS into a plurality of levels of low output impedance with the resistors 7,9,11,13, and next a plurality of output levels of high output impedance is made by making non-conductive the elements 6,8,10,12, thereby obtaining the result of test evaluation high in reliability.
COPYRIGHT: (C)1979,JPO&Japio
JP15994077A 1977-12-27 1977-12-27 Integrated circuit device with liquid crystal display drive circuit Expired JPS606520B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15994077A JPS606520B2 (en) 1977-12-27 1977-12-27 Integrated circuit device with liquid crystal display drive circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15994077A JPS606520B2 (en) 1977-12-27 1977-12-27 Integrated circuit device with liquid crystal display drive circuit

Publications (2)

Publication Number Publication Date
JPS5490933A true JPS5490933A (en) 1979-07-19
JPS606520B2 JPS606520B2 (en) 1985-02-19

Family

ID=15704473

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15994077A Expired JPS606520B2 (en) 1977-12-27 1977-12-27 Integrated circuit device with liquid crystal display drive circuit

Country Status (1)

Country Link
JP (1) JPS606520B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58159582A (en) * 1982-03-18 1983-09-21 株式会社東芝 Ic for liquid crystal driving

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58159582A (en) * 1982-03-18 1983-09-21 株式会社東芝 Ic for liquid crystal driving

Also Published As

Publication number Publication date
JPS606520B2 (en) 1985-02-19

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