JPS5781614A - Temperature display device - Google Patents

Temperature display device

Info

Publication number
JPS5781614A
JPS5781614A JP55158598A JP15859880A JPS5781614A JP S5781614 A JPS5781614 A JP S5781614A JP 55158598 A JP55158598 A JP 55158598A JP 15859880 A JP15859880 A JP 15859880A JP S5781614 A JPS5781614 A JP S5781614A
Authority
JP
Japan
Prior art keywords
light
temperature
light emitting
emits
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
JP55158598A
Other languages
Japanese (ja)
Inventor
Shigeru Murakami
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 JP55158598A priority Critical patent/JPS5781614A/en
Publication of JPS5781614A publication Critical patent/JPS5781614A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/1906—Control of temperature characterised by the use of electric means using an analogue comparing device
    • G05D23/1912—Control of temperature characterised by the use of electric means using an analogue comparing device whose output amplitude can take more than two discrete values

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Testing And Monitoring For Control Systems (AREA)

Abstract

PURPOSE:To discriminate obviously conditions of the current temperature for a set temperature, by providing a display material, which emits the light when the room temperature is higher than the set temperature, and a display material which emits the light when it is lower than the set temperature. CONSTITUTION:In case of a low room temperature, the potential at a point (a) determined by a temperature detecting thermistor 6, a temperature regulator 2, and a resistance 7 and potentials at points (b), (c), and (d) determined by resistances 8-11 satisfy relations (a)>(b), (c), and (d), and a light emitting diode 3 does not emit the light because the output of a voltage comparator 12 is 1, and a light emitting diode 4 emits the light because the output of a voltage comparator 13 is 0. When the room temperature approximates to the set temperature, respective potentials satisfy (a)>(b), (c), and (d), and outputs of voltage comparators 12 and 13 are 1, and light emitting diodes 3 and 4 do not emit the light. When the room temperature rises furthermore, the light emitting diode 3 emits the light because the output of the voltage comparator 12 is 0, and the light emitting diode 4 does not emit the light because the output of the voltage comparator 14 is 1.
JP55158598A 1980-11-10 1980-11-10 Temperature display device Pending JPS5781614A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55158598A JPS5781614A (en) 1980-11-10 1980-11-10 Temperature display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55158598A JPS5781614A (en) 1980-11-10 1980-11-10 Temperature display device

Publications (1)

Publication Number Publication Date
JPS5781614A true JPS5781614A (en) 1982-05-21

Family

ID=15675180

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55158598A Pending JPS5781614A (en) 1980-11-10 1980-11-10 Temperature display device

Country Status (1)

Country Link
JP (1) JPS5781614A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60158325A (en) * 1984-01-30 1985-08-19 Matsushita Electric Ind Co Ltd Temperature level display device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55135911A (en) * 1979-04-11 1980-10-23 Omron Tateisi Electronics Co Temperature regulator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55135911A (en) * 1979-04-11 1980-10-23 Omron Tateisi Electronics Co Temperature regulator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60158325A (en) * 1984-01-30 1985-08-19 Matsushita Electric Ind Co Ltd Temperature level display device

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