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
Links
- 239000004973 liquid crystal related substance Substances 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Liquid Crystal Display Device Control (AREA)
- Liquid Crystal (AREA)
Description
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)
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.
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)
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)
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 |
-
1988
- 1988-09-19 JP JP1988122453U patent/JPH0618342Y2/en not_active Expired - Lifetime
Patent Citations (3)
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)
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 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPH0245521U (en) | ||
JPH01137680U (en) | ||
JPH022719U (en) | ||
JPH0245523U (en) | ||
JP2695774B2 (en) | Servo motor power drive unit operation control method | |
JPH0245522U (en) | ||
JPH0456913B2 (en) | ||
JPH02123731U (en) | ||
KR910005672Y1 (en) | Circuit controlling alarm device in a clock | |
JPS63164199U (en) | ||
JPS607965U (en) | electric screwdriver | |
JPS6279224U (en) | ||
JPH01178167U (en) | ||
JPH0284176U (en) | ||
JPH0354397U (en) | ||
JPH02174591A (en) | Holding-current control circuit | |
JPS6438695U (en) | ||
JPH01172092U (en) | ||
JPS61150337U (en) | ||
JPS63121410U (en) | ||
JPS61113197U (en) | ||
JPS649499U (en) | ||
JPH0232236U (en) | ||
JPH02125584U (en) | ||
JPS61203434U (en) |