JPS5617414A - Electric power supply system of electronic apparatus - Google Patents
Electric power supply system of electronic apparatusInfo
- 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
Links
Landscapes
- 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
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)
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)
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 |
-
1979
- 1979-07-24 JP JP9383779A patent/JPS5617414A/en active Pending
Patent Citations (2)
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)
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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