JPH0245521U - - Google Patents

Info

Publication number
JPH0245521U
JPH0245521U JP12245388U JP12245388U JPH0245521U JP H0245521 U JPH0245521 U JP H0245521U JP 12245388 U JP12245388 U JP 12245388U JP 12245388 U JP12245388 U JP 12245388U JP H0245521 U JPH0245521 U JP H0245521U
Authority
JP
Japan
Prior art keywords
liquid crystal
microcomputer
control signal
drive voltage
power supply
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
JP12245388U
Other languages
Japanese (ja)
Other versions
JPH0618342Y2 (en
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 filed Critical
Priority to JP1988122453U priority Critical patent/JPH0618342Y2/en
Publication of JPH0245521U publication Critical patent/JPH0245521U/ja
Application granted granted Critical
Publication of JPH0618342Y2 publication Critical patent/JPH0618342Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

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

Description

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本考案の液晶駆動電圧発生回路を示す回
路図である。 ２，３，４，５，６…抵抗、７，８，９，１０
，１１…Ｐ―ＭＯＳ、１２…Ｎ―ＭＯＳ。 The drawing is a circuit diagram showing a liquid crystal driving voltage generating circuit according to the present invention. 2, 3, 4, 5, 6...resistance, 7, 8, 9, 10
, 11...P-MOS, 12...N-MOS.

Claims (1)

【実用新案登録請求の範囲】 (1) 第１電源及び第２電源間に直列接続され、
各接続点に得られる液晶駆動電圧によつて、液晶
表示装置のコモン電極及びセグメント電極に夫々
印加されるコモン駆動電圧及びセグメント駆動電
圧を作成させる複数の抵抗と、 前記第１電源及び前記複数の抵抗の各接続点間
に夫々接続され、前記液晶表示装置の消灯及び点
灯を制御する制御信号によつてオン／オフが制御
される複数の第１スイツチ回路と、 前記複数の抵抗中で前記第２電源が印加される
抵抗の一端及び該第２電源間に接続され、前記制
御信号によつてオン／オフが制御される第２スイ
ツチ回路とを備え、 前記制御信号によつて、前記複数の抵抗の各接
続点に得られる液晶駆動電圧を、前記第１電源に
よる電源電圧としたことを特徴とする液晶駆動電
圧発生回路。 (2) ホルト命令の実行によつて動作を停止する
マイクロコンピユータにおいて、請求項(1)記載
の液晶駆動電圧発生回路を備え、前記ホルト命令
による動作の停止以前に消灯命令の実行によつて
前記制御信号を発生させ、該制御信号によつて前
記第１及び第２のスイツチ回路のオン／オフを制
御することを特徴としたマイクロコンピユータ。 (3) ホルト命令の実行によつて動作を停止する
マイクロコンピユータにおいて、請求項(1)記載
の液晶駆動電圧発生回路を備え、前記ホルト命令
の実行によつて前記制御信号を発生させ、該制御
信号によつて前記第１及び第２のスイツチ回路の
オン／オフを制御することを特徴としたマイクロ
コンピユータ。[Claims for utility model registration] (1) Connected in series between the first power source and the second power source,
a plurality of resistors that create common drive voltages and segment drive voltages that are respectively applied to the common electrode and segment electrode of the liquid crystal display device according to the liquid crystal drive voltage obtained at each connection point; and the first power supply and the plurality of resistors. a plurality of first switch circuits connected between respective connection points of the resistors, and whose on/off is controlled by a control signal that controls turning off and on of the liquid crystal display device; a second switch circuit connected between one end of a resistor to which two power supplies are applied and the second power supply, and whose on/off is controlled by the control signal; A liquid crystal drive voltage generation circuit characterized in that the liquid crystal drive voltage obtained at each connection point of the resistor is a power supply voltage from the first power supply. (2) A microcomputer that stops its operation upon execution of a halt command, comprising the liquid crystal drive voltage generation circuit according to claim (1), wherein the microcomputer stops its operation by executing a lights-out command before stopping its operation according to the halt command. A microcomputer that generates a control signal and controls on/off of the first and second switch circuits using the control signal. (3) A microcomputer that stops its operation upon execution of a halt instruction, comprising the liquid crystal drive voltage generation circuit according to claim (1), which generates the control signal upon execution of the halt instruction; A microcomputer that controls on/off of the first and second switch circuits using a signal.
JP1988122453U 1988-09-19 1988-09-19 LCD drive voltage generation circuit Expired - Lifetime JPH0618342Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1988122453U JPH0618342Y2 (en) 1988-09-19 1988-09-19 LCD drive voltage generation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1988122453U JPH0618342Y2 (en) 1988-09-19 1988-09-19 LCD drive voltage generation circuit

Publications (2)

Publication Number Publication Date
JPH0245521U true JPH0245521U (en) 1990-03-28
JPH0618342Y2 JPH0618342Y2 (en) 1994-05-11

Family

ID=31370401

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1988122453U Expired - Lifetime JPH0618342Y2 (en) 1988-09-19 1988-09-19 LCD drive voltage generation circuit

Country Status (1)

Country Link
JP (1) JPH0618342Y2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003005724A (en) * 2001-06-25 2003-01-08 Oki Micro Design Co Ltd Driving power source circuit for liquid crystal display panel
WO2005081218A1 (en) * 2004-02-23 2005-09-01 Toshiba Matsushita Display Technology Co., Ltd. Display signal processing apparatus and display apparatus

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5746291A (en) * 1980-09-04 1982-03-16 Ricoh Kk Liquid crystal display element displaying system
JPS5865481A (en) * 1981-10-15 1983-04-19 株式会社東芝 Voltage division circuit for driving liquid crystal
JPS5913288A (en) * 1982-07-15 1984-01-24 株式会社東芝 Liquid crystal driving circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5746291A (en) * 1980-09-04 1982-03-16 Ricoh Kk Liquid crystal display element displaying system
JPS5865481A (en) * 1981-10-15 1983-04-19 株式会社東芝 Voltage division circuit for driving liquid crystal
JPS5913288A (en) * 1982-07-15 1984-01-24 株式会社東芝 Liquid crystal driving circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003005724A (en) * 2001-06-25 2003-01-08 Oki Micro Design Co Ltd Driving power source circuit for liquid crystal display panel
WO2005081218A1 (en) * 2004-02-23 2005-09-01 Toshiba Matsushita Display Technology Co., Ltd. Display signal processing apparatus and display apparatus
JP2005234495A (en) * 2004-02-23 2005-09-02 Toshiba Matsushita Display Technology Co Ltd Display signal processing apparatus and display device

Also Published As

Publication number Publication date
JPH0618342Y2 (en) 1994-05-11

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