JPS57185424A - Method and device for overscale display - Google Patents

Method and device for overscale display

Info

Publication number
JPS57185424A
JPS57185424A JP56071095A JP7109581A JPS57185424A JP S57185424 A JPS57185424 A JP S57185424A JP 56071095 A JP56071095 A JP 56071095A JP 7109581 A JP7109581 A JP 7109581A JP S57185424 A JPS57185424 A JP S57185424A
Authority
JP
Japan
Prior art keywords
voltage
output
circuit
led7a
caution
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
JP56071095A
Other languages
Japanese (ja)
Inventor
Yukio Tanaka
Kazuo Ichikawa
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.)
Olympus Corp
Original Assignee
Olympus Corp
Olympus Optical 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 Olympus Corp, Olympus Optical Co Ltd filed Critical Olympus Corp
Priority to JP56071095A priority Critical patent/JPS57185424A/en
Publication of JPS57185424A publication Critical patent/JPS57185424A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/18—Signals indicating condition of a camera member or suitability of light

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Stroboscope Apparatuses (AREA)
  • Indication In Cameras, And Counting Of Exposures (AREA)

Abstract

PURPOSE:To give clearly caution and warning to the user, by lighting up plural light emitting elements in steps and according to the level of the input voltage and blinking the light emitting elements when the input voltage exceeds the threshold value. CONSTITUTION:The charge voltage Va of an electronic flash which is supplied to an input terminal 1 is turned into the voltage Vb via a diode 2 and supplied to an LED driving circuit 8 and a comparator 3, respectively. The circuit 8 lights up LED7a-7d in steps and according to the level of the voltage Vb. While the comparator 3 compares the reference voltage Vc, i.e., the threshold value with an output Vb. When the Vb exceeds the Vd, an output Vd is delivered. With this output Vd, an oscillator 4 starts its oscillation. Then a transistor 6 is turned on and off. As a result, the output current of the circuit 8 is switched, and the LED7a-7d blink. In such a way, the caution and the warning can be given clearly to the user.
JP56071095A 1981-05-12 1981-05-12 Method and device for overscale display Pending JPS57185424A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56071095A JPS57185424A (en) 1981-05-12 1981-05-12 Method and device for overscale display

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56071095A JPS57185424A (en) 1981-05-12 1981-05-12 Method and device for overscale display

Publications (1)

Publication Number Publication Date
JPS57185424A true JPS57185424A (en) 1982-11-15

Family

ID=13450628

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56071095A Pending JPS57185424A (en) 1981-05-12 1981-05-12 Method and device for overscale display

Country Status (1)

Country Link
JP (1) JPS57185424A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4944743A (en) * 1972-08-31 1974-04-27

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4944743A (en) * 1972-08-31 1974-04-27

Similar Documents

Publication Publication Date Title
US3473084A (en) Constant intensity lamp control with an optical feedback control
US3944854A (en) Light-emitting diode connected to a coil
JPS57185424A (en) Method and device for overscale display
EP0101643A3 (en) Constant current sources for field contact inputs
US3018473A (en) Low-voltage transistorized electric light flasher circuit for barricade lights, etc.
JPS54140531A (en) Strobo voltage confirming device
CN220043723U (en) Warning lamp control circuit
CN210491277U (en) Light sense control circuit of LED driving power supply
JPS56119121A (en) Automatic dimming electronic flash emitting device
GB1437034A (en) Automatic flashing lamp device
ATE19381T1 (en) SUPPLY SYSTEM FOR BICYCLE LAMPS.
JPS57629A (en) Display device for camera
JP6942425B2 (en) Lighting device
KR910001946Y1 (en) Electric flickering device
JPS5687384A (en) Light emitting diode type display lamp
JPS57172837A (en) Control device for car lamp
JPS57104433A (en) Automatic turn-on/off device for turn-on circuit of automobile light
KR860003409Y1 (en) Display circuit of battery voltage by using tunning display
JPS57105624A (en) Safety device for combustion equipment
JPS6445097A (en) Automatic illuminance control device for fluorescent lamp
JPS5778375A (en) Transistor inverter device
KR800000910Y1 (en) Electronic circuit used for accessory electric display-lamp
JPS55113386A (en) Light emitting diode energizing circuit
JPH0677532A (en) Led driving circuit
JPS57132424A (en) 2 electric power supply made of electronic circuit device