JPS5490933A - Integrated circuit device having liquid crystal display unit driving circuit - Google Patents
Integrated circuit device having liquid crystal display unit driving circuitInfo
- 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
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
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)
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 |
-
1977
- 1977-12-27 JP JP15994077A patent/JPS606520B2/en not_active Expired
Cited By (1)
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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