JPS62294223A - Liquid crystal display control system - Google Patents

Liquid crystal display control system

Info

Publication number
JPS62294223A
JPS62294223A JP13792786A JP13792786A JPS62294223A JP S62294223 A JPS62294223 A JP S62294223A JP 13792786 A JP13792786 A JP 13792786A JP 13792786 A JP13792786 A JP 13792786A JP S62294223 A JPS62294223 A JP S62294223A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
back illumination
part
liquid crystal
crystal display
monitor part
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
JP13792786A
Inventor
Takenosuke Harada
Hiroshi Maruoka
Hisashi Tanido
Original Assignee
Pfu 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

Links

Abstract

PURPOSE: To extend the life of back illumination and to reduce the power consumption by optionally controlling the back illumination of a liquid crystal display part in accordance with turning-on/off of the output signal of a time monitor part.
CONSTITUTION: The controller of a liquid crystal display device with back illumination is provided with a time monitor part 3 which monitors the access signal to a display video memory 1, a mechanism which initializes the monitor part 3 from the external, and an output inhibiting gate 4 which suppresses the output signal of the monitor part 3. The power source of a back illumination part 6 is turned on/off by the output signal of the monitor part 3 to automatically extinguish the back illumination unless it is necessary, and thus, the life of lighting of the back illumination is extended and the power consumption is reduced.
COPYRIGHT: (C)1987,JPO&Japio
JP13792786A 1986-06-13 1986-06-13 Liquid crystal display control system Pending JPS62294223A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13792786A JPS62294223A (en) 1986-06-13 1986-06-13 Liquid crystal display control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13792786A JPS62294223A (en) 1986-06-13 1986-06-13 Liquid crystal display control system

Publications (1)

Publication Number Publication Date
JPS62294223A true true JPS62294223A (en) 1987-12-21

Family

ID=15209935

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13792786A Pending JPS62294223A (en) 1986-06-13 1986-06-13 Liquid crystal display control system

Country Status (1)

Country Link
JP (1) JPS62294223A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0363622A (en) * 1989-08-01 1991-03-19 Matsushita Electric Ind Co Ltd Video display device
JPH0493920A (en) * 1990-08-06 1992-03-26 Sanyo Electric Co Ltd Electronic equipment
JPH07140438A (en) * 1993-11-17 1995-06-02 Nec Corp Liquid crystal display device
US6990595B2 (en) 1990-03-23 2006-01-24 Matsushita Electric Industrial Co., Ltd. Data processing apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57142696A (en) * 1981-02-27 1982-09-03 Hitachi Ltd Liquid crystal display unit
JPS61215588A (en) * 1985-02-27 1986-09-25 Fujitsu Ltd Liquid crystal display unit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57142696A (en) * 1981-02-27 1982-09-03 Hitachi Ltd Liquid crystal display unit
JPS61215588A (en) * 1985-02-27 1986-09-25 Fujitsu Ltd Liquid crystal display unit

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0363622A (en) * 1989-08-01 1991-03-19 Matsushita Electric Ind Co Ltd Video display device
US7821489B2 (en) 1990-03-23 2010-10-26 Panasonic Corporation Data processing apparatus
US6990595B2 (en) 1990-03-23 2006-01-24 Matsushita Electric Industrial Co., Ltd. Data processing apparatus
US7006181B2 (en) 1990-03-23 2006-02-28 Matsushita Electric Industrial Co., Ltd. Data processing apparatus
US7024572B2 (en) 1990-03-23 2006-04-04 Matsushita Electric Industrial Co., Ltd. Data processing apparatus
US7120809B2 (en) 1990-03-23 2006-10-10 Matsushita Electric Industrial Co., Ltd. Data processing apparatus
JPH0493920A (en) * 1990-08-06 1992-03-26 Sanyo Electric Co Ltd Electronic equipment
JPH07140438A (en) * 1993-11-17 1995-06-02 Nec Corp Liquid crystal display device

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