JPS54149490A - Driving circuit of electroluminescence device - Google Patents

Driving circuit of electroluminescence device

Info

Publication number
JPS54149490A
JPS54149490A JP5858078A JP5858078A JPS54149490A JP S54149490 A JPS54149490 A JP S54149490A JP 5858078 A JP5858078 A JP 5858078A JP 5858078 A JP5858078 A JP 5858078A JP S54149490 A JPS54149490 A JP S54149490A
Authority
JP
Japan
Prior art keywords
electroluminescence device
driving circuit
external light
changes
circuit
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
JP5858078A
Other languages
Japanese (ja)
Inventor
Nobuyuki Yamamura
Yoshiyuki Fujihira
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.)
Omron Corp
Original Assignee
Omron Tateisi Electronics Co
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 Omron Tateisi Electronics Co filed Critical Omron Tateisi Electronics Co
Priority to JP5858078A priority Critical patent/JPS54149490A/en
Publication of JPS54149490A publication Critical patent/JPS54149490A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To make the control of luminance high-precision and easy by changing an oscillation output frequency through a photo detector, which changes impedance according to external light, in the driving circuit of an electroluminescence device which changes luminance according to external light.
CONSTITUTION: An oscillator circuit which is connected to a DC power source and applies the output as an alternating field to an electroluminescence device through an amplifier circuit is constituted by an astatic multivibrator formed by transistors 5 and 6, capacitors 7 and 8, and resitors 9 and 10.
COPYRIGHT: (C)1979,JPO&Japio
JP5858078A 1978-05-16 1978-05-16 Driving circuit of electroluminescence device Pending JPS54149490A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5858078A JPS54149490A (en) 1978-05-16 1978-05-16 Driving circuit of electroluminescence device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5858078A JPS54149490A (en) 1978-05-16 1978-05-16 Driving circuit of electroluminescence device

Publications (1)

Publication Number Publication Date
JPS54149490A true JPS54149490A (en) 1979-11-22

Family

ID=13088385

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5858078A Pending JPS54149490A (en) 1978-05-16 1978-05-16 Driving circuit of electroluminescence device

Country Status (1)

Country Link
JP (1) JPS54149490A (en)

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