GB1396027A - Electronic display apparatus - Google Patents

Electronic display apparatus

Info

Publication number
GB1396027A
GB1396027A GB5650272A GB5650272A GB1396027A GB 1396027 A GB1396027 A GB 1396027A GB 5650272 A GB5650272 A GB 5650272A GB 5650272 A GB5650272 A GB 5650272A GB 1396027 A GB1396027 A GB 1396027A
Authority
GB
United Kingdom
Prior art keywords
lights
dec
exceeds
datum
signal
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.)
Expired
Application number
GB5650272A
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.)
Compteurs Schlumberger SA
Original Assignee
Compteurs Schlumberger SA
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 Compteurs Schlumberger SA filed Critical Compteurs Schlumberger SA
Publication of GB1396027A publication Critical patent/GB1396027A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
    • G01R19/1659—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 to indicate that the value is within or outside a predetermined range of values (window)
    • G01R19/16595—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 to indicate that the value is within or outside a predetermined range of values (window) with multi level indication
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R13/00—Arrangements for displaying electric variables or waveforms
    • G01R13/40—Arrangements for displaying electric variables or waveforms using modulation of a light beam otherwise than by mechanical displacement, e.g. by Kerr effect
    • G01R13/404—Arrangements for displaying electric variables or waveforms using modulation of a light beam otherwise than by mechanical displacement, e.g. by Kerr effect for discontinuous display, i.e. display of discrete values
    • G01R13/405—Arrangements for displaying electric variables or waveforms using modulation of a light beam otherwise than by mechanical displacement, e.g. by Kerr effect for discontinuous display, i.e. display of discrete values using a plurality of active, i.e. light emitting, e.g. electro-luminescent elements, i.e. bar graphs
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/06—Continuously compensating for, or preventing, undesired influence of physical parameters
    • H03M1/08—Continuously compensating for, or preventing, undesired influence of physical parameters of noise

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Indicating Measured Values (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

1396027 Analogue to digital converters; indicators COMPTEURS SCHLUMBERGER 7 Dec 1972 [10 Dec 1971] 56502/72 Heading G4H An indicator comprises two groups of lights V 1 -V 3 and V 5 -V 7 on respective sides of a central continuously energized datum light V 4 for indicating positive and negative values respectively. Thus a positive difference between an input signal C and a datum signal M causes one or more of V 3 , V 2 , V 1 to light according to how many thresholds 6 it exceeds and a negative difference signal causes one or more of V 5 , V 6 , V 7 to light according to how many thresholds 6<SP>1</SP> it exceeds after inversion at IC2. The threshold increments are defined by diodes CR 5 -CR 8 . The input signal C may represent a temperature. The lights may be gas tubes or electroluminescent diodes.
GB5650272A 1971-12-10 1972-12-07 Electronic display apparatus Expired GB1396027A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7144425A FR2162309B1 (en) 1971-12-10 1971-12-10

Publications (1)

Publication Number Publication Date
GB1396027A true GB1396027A (en) 1975-05-29

Family

ID=9087274

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5650272A Expired GB1396027A (en) 1971-12-10 1972-12-07 Electronic display apparatus

Country Status (5)

Country Link
BE (1) BE791399A (en)
ES (1) ES409471A1 (en)
FR (1) FR2162309B1 (en)
GB (1) GB1396027A (en)
IT (1) IT971567B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1568576A (en) * 1977-05-03 1980-06-04 Chronolog Syst Electrical circuit means for use in analogue display

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3487263A (en) * 1966-07-18 1969-12-30 Aerospace Prod Res Display device with separate means for defining and positioning the symbol

Also Published As

Publication number Publication date
ES409471A1 (en) 1975-11-16
IT971567B (en) 1974-05-10
FR2162309A1 (en) 1973-07-20
FR2162309B1 (en) 1976-02-13
BE791399A (en) 1973-05-14

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee