JPS5617414A - Electric power supply system of electronic apparatus - Google Patents

Electric power supply system of electronic apparatus

Info

Publication number
JPS5617414A
JPS5617414A JP9383779A JP9383779A JPS5617414A JP S5617414 A JPS5617414 A JP S5617414A JP 9383779 A JP9383779 A JP 9383779A JP 9383779 A JP9383779 A JP 9383779A JP S5617414 A JPS5617414 A JP S5617414A
Authority
JP
Japan
Prior art keywords
circuit
voltage
electric power
battery
output voltage
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
JP9383779A
Other languages
Japanese (ja)
Inventor
Takeshi Sasaki
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.)
Casio Computer Co Ltd
Original Assignee
Casio Computer 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 Casio Computer Co Ltd filed Critical Casio Computer Co Ltd
Priority to JP9383779A priority Critical patent/JPS5617414A/en
Publication of JPS5617414A publication Critical patent/JPS5617414A/en
Pending legal-status Critical Current

Links

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  • Power Sources (AREA)
  • Direct Current Feeding And Distribution (AREA)

Abstract

PURPOSE: To save electric power consumed by an electronic circuit that supplies display data to a liquid-crystal display part, by driving at least part of the electronic circuit at a voltage obtained by decreasing the output voltage of an electric power source.
CONSTITUTION: Output voltage Vss(1.5V) from battery 1 is supplied to doubler circuit 2 and halver circuit 3. Doubler corcuit 2 doubles battery voltage Vss. Halver circuit 3 halves battery voltage Vss. Liquid-crystal display unit 9, applied with output voltage Vss of battery 1, the ground voltage and output voltage V2 from doubler circuit 3, displays display data from time clocking circuit 8 according to the dynamic drive system on the basis of those ternary-level voltages.
COPYRIGHT: (C)1981,JPO&Japio
JP9383779A 1979-07-24 1979-07-24 Electric power supply system of electronic apparatus Pending JPS5617414A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9383779A JPS5617414A (en) 1979-07-24 1979-07-24 Electric power supply system of electronic apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9383779A JPS5617414A (en) 1979-07-24 1979-07-24 Electric power supply system of electronic apparatus

Publications (1)

Publication Number Publication Date
JPS5617414A true JPS5617414A (en) 1981-02-19

Family

ID=14093496

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9383779A Pending JPS5617414A (en) 1979-07-24 1979-07-24 Electric power supply system of electronic apparatus

Country Status (1)

Country Link
JP (1) JPS5617414A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5198747A (en) * 1990-05-02 1993-03-30 Texas Instruments Incorporated Liquid crystal display driver and driver method
US7376848B2 (en) 1997-06-27 2008-05-20 Broadcom Corporation Battery powered device with dynamic power and performance management

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52149919A (en) * 1976-06-08 1977-12-13 Sanyo Electric Co Ltd Electronic equipment
JPS5441018A (en) * 1977-09-08 1979-03-31 Seiko Epson Corp Supply voltage control circuit incorporating monolithic ic

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52149919A (en) * 1976-06-08 1977-12-13 Sanyo Electric Co Ltd Electronic equipment
JPS5441018A (en) * 1977-09-08 1979-03-31 Seiko Epson Corp Supply voltage control circuit incorporating monolithic ic

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5198747A (en) * 1990-05-02 1993-03-30 Texas Instruments Incorporated Liquid crystal display driver and driver method
US7376848B2 (en) 1997-06-27 2008-05-20 Broadcom Corporation Battery powered device with dynamic power and performance management
US7900067B2 (en) 1997-06-27 2011-03-01 Broadcom Corporation Battery powered device with dynamic and performance management
US8504852B2 (en) 1997-06-27 2013-08-06 Broadcom Corporation Battery powered device with dynamic power and performance management

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