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FR2458199A1 - Detector for faulty lamp in motor vehicle - is operated by comparator circuits from lamp current flow in resistor - Google Patents

Detector for faulty lamp in motor vehicle - is operated by comparator circuits from lamp current flow in resistor

Info

Publication number
FR2458199A1
FR2458199A1 FR7914160A FR7914160A FR2458199A1 FR 2458199 A1 FR2458199 A1 FR 2458199A1 FR 7914160 A FR7914160 A FR 7914160A FR 7914160 A FR7914160 A FR 7914160A FR 2458199 A1 FR2458199 A1 FR 2458199A1
Authority
FR
France
Prior art keywords
lamp
circuit
resistor
motor vehicle
detector
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.)
Granted
Application number
FR7914160A
Other languages
French (fr)
Other versions
FR2458199B1 (en
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 E D
Original Assignee
Compteurs E D
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 E D filed Critical Compteurs E D
Priority to FR7914160A priority Critical patent/FR2458199A1/en
Publication of FR2458199A1 publication Critical patent/FR2458199A1/en
Application granted granted Critical
Publication of FR2458199B1 publication Critical patent/FR2458199B1/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q11/00—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00
    • B60Q11/005—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00 for lighting devices, e.g. indicating if lamps are burning or not
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/20—Responsive to malfunctions or to light source life; for protection
    • H05B47/21—Responsive to malfunctions or to light source life; for protection of two or more light sources connected in parallel

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

The lamp fault detection circuit utilises a current generator circuit to pass a constant current through a potential divider circuit from which a reference voltage is obtd. This allows the ref. volt. to vary in the same way as the voltage across a resistor in series with a motor vehicle lamp circuit. A test resistor (3) of low value w.r.t lamp resistance is connected in series with two lamps (1,2) and is connected to the vehicle battery circuit. The voltage across the resistor indicates the operational state of the lamps and is compared in a comparator (5) with a reference voltage from a potential divider circuit (6). A memory circuit comprising a second comparator (6) controls the illumination of an indicator lamp (7) on the vehicle dash panel to indicate lamp failure.
FR7914160A 1979-06-01 1979-06-01 Detector for faulty lamp in motor vehicle - is operated by comparator circuits from lamp current flow in resistor Granted FR2458199A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7914160A FR2458199A1 (en) 1979-06-01 1979-06-01 Detector for faulty lamp in motor vehicle - is operated by comparator circuits from lamp current flow in resistor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7914160A FR2458199A1 (en) 1979-06-01 1979-06-01 Detector for faulty lamp in motor vehicle - is operated by comparator circuits from lamp current flow in resistor

Publications (2)

Publication Number Publication Date
FR2458199A1 true FR2458199A1 (en) 1980-12-26
FR2458199B1 FR2458199B1 (en) 1982-10-01

Family

ID=9226159

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7914160A Granted FR2458199A1 (en) 1979-06-01 1979-06-01 Detector for faulty lamp in motor vehicle - is operated by comparator circuits from lamp current flow in resistor

Country Status (1)

Country Link
FR (1) FR2458199A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0503477A1 (en) * 1991-03-08 1992-09-16 TEMIC TELEFUNKEN microelectronic GmbH Circuit for monitoring consumers
US5172062A (en) * 1989-07-15 1992-12-15 Man Nutzfahrzeuge A.G. Device for testing electrical appliances used in a motor vehicle

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2090372A1 (en) * 1970-05-29 1972-01-14 Philips Nv
FR2367401A1 (en) * 1976-10-06 1978-05-05 Jaeger Vehicle headlamp monitoring circuit - has threshold switch coupled to reference circuit which with differential amplifier is connected to alarm signal generator
DE2748323A1 (en) * 1977-10-27 1979-05-03 Riba Jutta Monitoring circuit for vehicle incandescent lamp - has parallel diode protecting precision current detecting resistor from overload

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2090372A1 (en) * 1970-05-29 1972-01-14 Philips Nv
FR2367401A1 (en) * 1976-10-06 1978-05-05 Jaeger Vehicle headlamp monitoring circuit - has threshold switch coupled to reference circuit which with differential amplifier is connected to alarm signal generator
DE2748323A1 (en) * 1977-10-27 1979-05-03 Riba Jutta Monitoring circuit for vehicle incandescent lamp - has parallel diode protecting precision current detecting resistor from overload

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXK/78 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5172062A (en) * 1989-07-15 1992-12-15 Man Nutzfahrzeuge A.G. Device for testing electrical appliances used in a motor vehicle
EP0503477A1 (en) * 1991-03-08 1992-09-16 TEMIC TELEFUNKEN microelectronic GmbH Circuit for monitoring consumers

Also Published As

Publication number Publication date
FR2458199B1 (en) 1982-10-01

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Legal Events

Date Code Title Description
ST Notification of lapse
ST Notification of lapse