JPS5687021A - Battery capacity display device - Google Patents

Battery capacity display device

Info

Publication number
JPS5687021A
JPS5687021A JP16442679A JP16442679A JPS5687021A JP S5687021 A JPS5687021 A JP S5687021A JP 16442679 A JP16442679 A JP 16442679A JP 16442679 A JP16442679 A JP 16442679A JP S5687021 A JPS5687021 A JP S5687021A
Authority
JP
Japan
Prior art keywords
display element
circuit
erasing
time
output
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
JP16442679A
Other languages
Japanese (ja)
Inventor
Hidehiko Kawakami
Akio Yamashita
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP16442679A priority Critical patent/JPS5687021A/en
Publication of JPS5687021A publication Critical patent/JPS5687021A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Tests Of Electric Status Of Batteries (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)

Abstract

PURPOSE:To make possible the displaying at less than supply voltage for one dry cell by providing an oscillation circuit which oscillates according to battery capacities, a display element driving circuit which is driven by the output of the oscillation circuit, a specific display element and an erasing circuit thereof. CONSTITUTION:When the voltage of a battery 11 drops down to, for example, <=1.2V, a multivibrator 17 is oscillated by a detecting transistor 16. This output is applied to the driving transistor array 18 of a display element 23. When at this time the signal 26 which remains high level during the coloring time TW is applied, transistors 20, 21 conduct and the current flows from the pole (a) in the display to a counter electrode (b), thereby causing an electrochromic display element (ECD) 23 to color. While there is no signal 26, the ECD 23 assumes an electrically isolated state and the coloring is maintained by its memory effect. If at this time the dry cell is exchanged, the circuit 17 does not operate and its output goes 0. The operator then presses an erasing button 25 to operate a monostable multi 24 which is turn causes transistors 19, 22 to conduct, thereby erasing the display of the ECD23.
JP16442679A 1979-12-17 1979-12-17 Battery capacity display device Pending JPS5687021A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16442679A JPS5687021A (en) 1979-12-17 1979-12-17 Battery capacity display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16442679A JPS5687021A (en) 1979-12-17 1979-12-17 Battery capacity display device

Publications (1)

Publication Number Publication Date
JPS5687021A true JPS5687021A (en) 1981-07-15

Family

ID=15792921

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16442679A Pending JPS5687021A (en) 1979-12-17 1979-12-17 Battery capacity display device

Country Status (1)

Country Link
JP (1) JPS5687021A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6066170A (en) * 1983-09-20 1985-04-16 Hitachi Maxell Ltd Detector for residual capacity of secondary battery
WO2000063712A1 (en) * 1999-04-16 2000-10-26 The Gillette Company Gauge effect battery tester
WO2000063713A1 (en) * 1999-04-16 2000-10-26 The Gillette Company Pass/fail battery indicator

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5171795A (en) * 1974-12-19 1976-06-21 Matsushita Electric Ind Co Ltd

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5171795A (en) * 1974-12-19 1976-06-21 Matsushita Electric Ind Co Ltd

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6066170A (en) * 1983-09-20 1985-04-16 Hitachi Maxell Ltd Detector for residual capacity of secondary battery
WO2000063712A1 (en) * 1999-04-16 2000-10-26 The Gillette Company Gauge effect battery tester
WO2000063713A1 (en) * 1999-04-16 2000-10-26 The Gillette Company Pass/fail battery indicator
US6291096B1 (en) 1999-04-16 2001-09-18 The Gillette Company Pass/fail battery indicator and tester
US6294284B1 (en) 1999-04-16 2001-09-25 The Gillette Company Gauge effect battery tester

Similar Documents

Publication Publication Date Title
JPS5324798A (en) Driving circuit of electrochromic display device
JPS5331994A (en) Driving system of display device
JPS5687021A (en) Battery capacity display device
GB1497210A (en) Matrix memory
JPS5492094A (en) Power supply method for liquid crystal display substance
US4367469A (en) Uniform coloration control in an electrochromic display of the segmented type
GB1560103A (en) Method of driving electrochromic display segments of a display device of an electronic timepiece
JPS6259316B2 (en)
JPS63179335A (en) Electrochromic display device
JPS5354498A (en) Driving system of liquid crystal display device
JPS5692516A (en) Liquid crystal display device
JPS54113299A (en) Driving circuit of electro-chromic display device
JPS53149349A (en) Display device
JPS5319789A (en) Electrochromic display device
JPS5458456A (en) Driving device of electrochromic display body
JPS5653426A (en) Temperature measuring apparatus
JPS638888Y2 (en)
JPS535994A (en) Electrochemical display cell
JPS5412595A (en) Driving method of electrochromic display device
GB1560104A (en) Driver circuit in combination with an electrochromic display device
JPS58154894A (en) Drive circuit for electrochromic display element
JPS5317030A (en) Driving device of thin film el display unit
JPS5734527A (en) Electrochromic display body and its driving method
JPS5235672A (en) Electronic watch
JPS6131850B2 (en)