JPS5640817A - Display device for camera using electrochromic cell - Google Patents

Display device for camera using electrochromic cell

Info

Publication number
JPS5640817A
JPS5640817A JP11778179A JP11778179A JPS5640817A JP S5640817 A JPS5640817 A JP S5640817A JP 11778179 A JP11778179 A JP 11778179A JP 11778179 A JP11778179 A JP 11778179A JP S5640817 A JPS5640817 A JP S5640817A
Authority
JP
Japan
Prior art keywords
film
displaying
power consumption
low power
coloring
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
JP11778179A
Other languages
Japanese (ja)
Inventor
Ryoichi Suzuki
Takashi Uchiyama
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP11778179A priority Critical patent/JPS5640817A/en
Publication of JPS5640817A publication Critical patent/JPS5640817A/en
Pending legal-status Critical Current

Links

Landscapes

  • Indication In Cameras, And Counting Of Exposures (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)

Abstract

PURPOSE: To make electrical displaying of the number of photographed sheets, film length, etc. with low power consumption by making use of the coloring display holding characteristics of an electrochromic cell.
CONSTITUTION: When the step count value of a decimal counter or the like is applied to a decoder at every film winding, the signal such as seven bits of binary value according to the number of films is generated and the positive and negative pulses corresponding to the bit value of the binary bit signal are formed through a pulse generating circuit, differentiating circuit, etc. These pulses drive switching transistors Tr1... via inverters IN1, IN2... are directly drive switching transistors Tr8.... This causes decoloring current to be applied to the electrochromic cells (a), (b)... corresponding to 7 segments, etc. for displaying so that the display by the cells (a), (b)... of which the coloring is temporarily maintained by the current application are decolored. Hence, the number of photographed sheets, film length, film sensitivity, etc. may be electrically displayed with symbols, numerical values, etc. with low power consumption without using any intricate mechanical mechanism.
COPYRIGHT: (C)1981,JPO&Japio
JP11778179A 1979-09-13 1979-09-13 Display device for camera using electrochromic cell Pending JPS5640817A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11778179A JPS5640817A (en) 1979-09-13 1979-09-13 Display device for camera using electrochromic cell

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11778179A JPS5640817A (en) 1979-09-13 1979-09-13 Display device for camera using electrochromic cell

Publications (1)

Publication Number Publication Date
JPS5640817A true JPS5640817A (en) 1981-04-17

Family

ID=14720151

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11778179A Pending JPS5640817A (en) 1979-09-13 1979-09-13 Display device for camera using electrochromic cell

Country Status (1)

Country Link
JP (1) JPS5640817A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4555170A (en) * 1984-01-23 1985-11-26 Asahi Kogaku Kogyo Kabushiki Kaisha Device for illuminating display unit in viewfinder
US4731630A (en) * 1985-06-17 1988-03-15 Nippon Kogaku K. K. Display device
JPH01152443A (en) * 1988-11-10 1989-06-14 Minolta Camera Co Ltd Camera with lens cover

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50120332A (en) * 1974-03-04 1975-09-20

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50120332A (en) * 1974-03-04 1975-09-20

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4555170A (en) * 1984-01-23 1985-11-26 Asahi Kogaku Kogyo Kabushiki Kaisha Device for illuminating display unit in viewfinder
US4731630A (en) * 1985-06-17 1988-03-15 Nippon Kogaku K. K. Display device
JPH01152443A (en) * 1988-11-10 1989-06-14 Minolta Camera Co Ltd Camera with lens cover

Similar Documents

Publication Publication Date Title
JPS5331994A (en) Driving system of display device
GB1510204A (en) Electronic appliance with electro-optical display
JPS5324798A (en) Driving circuit of electrochromic display device
JPS5640817A (en) Display device for camera using electrochromic cell
JPS5420692A (en) Display device and production of the same
JPS5259597A (en) Display unit
JPS5273749A (en) Display cell showing reversible color by oxidation-reduction
GB1560103A (en) Method of driving electrochromic display segments of a display device of an electronic timepiece
JPS566225A (en) Film frame number display device of camera
JPS5258958A (en) Electronic watch
JPS5291397A (en) Electrode forming method for photo electrical dispaly unit
JPS5365278A (en) Image display cell
GB2036403A (en) Circuit for driving electro- optical display unit
JPS52110665A (en) Circuit for electronic clock
GB1377620A (en) Electronic timepiece
JPS5616157A (en) Information adding unit in copying machine
JPS5441756A (en) Production of electrochromic elements
JPS56115277A (en) Printer
JPS5533645A (en) Electronic watch with power source compensating function
JPS5353953A (en) Digital counter
JPS5412595A (en) Driving method of electrochromic display device
JPS5220722A (en) Capacitive display element driving unit
GB1560104A (en) Driver circuit in combination with an electrochromic display device
JPS5793325A (en) Electrochromic display device
JPS5436972A (en) Electronic watch