JPS554576A - Display device - Google Patents

Display device

Info

Publication number
JPS554576A
JPS554576A JP7825578A JP7825578A JPS554576A JP S554576 A JPS554576 A JP S554576A JP 7825578 A JP7825578 A JP 7825578A JP 7825578 A JP7825578 A JP 7825578A JP S554576 A JPS554576 A JP S554576A
Authority
JP
Japan
Prior art keywords
voltage
signal voltage
leds
display device
power source
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
JP7825578A
Other languages
Japanese (ja)
Inventor
Susumu Iguchi
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP7825578A priority Critical patent/JPS554576A/en
Publication of JPS554576A publication Critical patent/JPS554576A/en
Pending legal-status Critical Current

Links

Landscapes

  • Indicating Measured Values (AREA)

Abstract

PURPOSE: To simultaneously light two LEDs and increase the quantity of display information by obtaining two voltages for input signal voltage and subjecting these to A/D conversion in a camera.
CONSTITUTION: Input signal voltage passes through an operational amplifier 1 where it is added with the voltage V1 of a power source 2 to become the first signal voltage. Also, from the output voltage of the amplifier 1, the voltage V2 of a power source 3 is subtracted to provide the second voltage. A switch 4 is changed over by the output of a constant frequency from an oscillator 5 to supply the first signal voltage and the second signal voltage altenately to an A/D converter 6, the outputs whereof are then applied to a display device 7 to let two LEDs be simultaneously lighted.
COPYRIGHT: (C)1980,JPO&Japio
JP7825578A 1978-06-27 1978-06-27 Display device Pending JPS554576A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7825578A JPS554576A (en) 1978-06-27 1978-06-27 Display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7825578A JPS554576A (en) 1978-06-27 1978-06-27 Display device

Publications (1)

Publication Number Publication Date
JPS554576A true JPS554576A (en) 1980-01-14

Family

ID=13656878

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7825578A Pending JPS554576A (en) 1978-06-27 1978-06-27 Display device

Country Status (1)

Country Link
JP (1) JPS554576A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6470331A (en) * 1987-09-11 1989-03-15 Yamagata Gravure Kk Position arranging system in commodity packing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6470331A (en) * 1987-09-11 1989-03-15 Yamagata Gravure Kk Position arranging system in commodity packing

Similar Documents

Publication Publication Date Title
JPS5278052A (en) Switching regulator
JPS54128382A (en) Tuning signal intensity detecting circuit
JPS55108019A (en) Reference voltage generator
JPS5679946A (en) Optical densitometer
JPS52130277A (en) Transparent type scanning electronic microscope
JPS533767A (en) Input-output-insulation circuit using photocoupler
JPS5279742A (en) Electronic circuit
JPS5234779A (en) Ultrasonic probe
JPS5235958A (en) Multiplication and division circuit
JPS5415686A (en) Photoelectric converting device
JPS54114228A (en) Modulating signal generator of electronic musical instruments
JPS5318367A (en) Bias circuit
JPS5544972A (en) Measuring range changing method and device for pen recorder
JPS53111239A (en) Electronic digital equipment
JPS52129350A (en) Output polarity judgement unit of analog arithmetic circuit
JPS53127628A (en) Dc-dc converter
JPS5544982A (en) Frequency-voltage converter
JPS53105163A (en) Current amplifier circuit
JPS5441444A (en) Bias supplying circuit in which spliced type field effect transistor
JPS53102021A (en) Auxiliary power unit for electronic musical instrument
JPS52143431A (en) Exciting control device of generator
JPS547849A (en) Drift compensation circuit for sample hold circuit
JPS5535554A (en) Oscillator circuit
JPS53128718A (en) D.c. voltage transforming device
JPS53112097A (en) Liquid crystal display device