JPS62292549A - Headlight for vehicle - Google Patents

Headlight for vehicle

Info

Publication number
JPS62292549A
JPS62292549A JP61134663A JP13466386A JPS62292549A JP S62292549 A JPS62292549 A JP S62292549A JP 61134663 A JP61134663 A JP 61134663A JP 13466386 A JP13466386 A JP 13466386A JP S62292549 A JPS62292549 A JP S62292549A
Authority
JP
Japan
Prior art keywords
discharge lamp
discharge
lamp
service life
light
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
JP61134663A
Other languages
Japanese (ja)
Inventor
Seiichi Yamaguchi
Makoto Yamanoi
Original Assignee
Koito Mfg 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 Koito Mfg Co Ltd filed Critical Koito Mfg Co Ltd
Priority to JP61134663A priority Critical patent/JPS62292549A/en
Publication of JPS62292549A publication Critical patent/JPS62292549A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To prevent irradiation of the light having reduced flux or a flickering light by unlighting a discharge lamp and lighting an incandescent lamp upon droppage of the output level from the discharge lamp below a predetermined level by means of a discharge lamp output level detecting means. CONSTITUTION:When approaching to the end of service life, a discharge lamp 6 exhibits a disturbed discharge condition where the discharge current 19 does not settle but fluctuates. When the discharge current 19 exceeds over a referential level 20 under such condition, a signal is provided from a comparison circuit 16 to a control circuit 8 which detects that the discharge lamp 6 has approached to the end of service life. Consequently, the control circuit 8 stops power supply to the discharge lamp 6 while starts power supply to an incandescent lamp 7 so as to light the incandescent lamp 7. At the same time, a display 17 displays that the discharge lamp 6 has approached to the end of service life.
JP61134663A 1986-06-10 1986-06-10 Headlight for vehicle Pending JPS62292549A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61134663A JPS62292549A (en) 1986-06-10 1986-06-10 Headlight for vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61134663A JPS62292549A (en) 1986-06-10 1986-06-10 Headlight for vehicle

Publications (1)

Publication Number Publication Date
JPS62292549A true JPS62292549A (en) 1987-12-19

Family

ID=15133644

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61134663A Pending JPS62292549A (en) 1986-06-10 1986-06-10 Headlight for vehicle

Country Status (1)

Country Link
JP (1) JPS62292549A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04129849A (en) * 1990-09-21 1992-04-30 Nissan Motor Co Ltd Control device for vehicle headlamp
US6445135B2 (en) * 1999-11-02 2002-09-03 Mitsubishi Denki Kabushiki Kaisha Electric-discharge lamp control apparatus and electric-discharge lamp control method

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5679885A (en) * 1979-11-30 1981-06-30 Matsushita Electric Works Ltd Device for firing discharge lamp
JPS5697996A (en) * 1980-01-09 1981-08-07 Mitsubishi Electric Corp Device for firing high voltage disgharge lamp
JPS5776791A (en) * 1980-10-30 1982-05-13 Matsushita Electric Works Ltd Light compensating device for high voltage discharge lamp
JPS57182997A (en) * 1981-05-06 1982-11-11 Matsushita Electric Works Ltd Device for firing discharge lamp
JPS59128798A (en) * 1983-01-13 1984-07-24 Toshiba Electric Equip Light compensating unit for high intensity discharge lamp
JPS59134020A (en) * 1983-01-19 1984-08-01 Toshiba Corp Headlight device for vehicle
JPS603699B2 (en) * 1979-04-26 1985-01-30 Hitachi Ltd

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS603699B2 (en) * 1979-04-26 1985-01-30 Hitachi Ltd
JPS5679885A (en) * 1979-11-30 1981-06-30 Matsushita Electric Works Ltd Device for firing discharge lamp
JPS5697996A (en) * 1980-01-09 1981-08-07 Mitsubishi Electric Corp Device for firing high voltage disgharge lamp
JPS5776791A (en) * 1980-10-30 1982-05-13 Matsushita Electric Works Ltd Light compensating device for high voltage discharge lamp
JPS57182997A (en) * 1981-05-06 1982-11-11 Matsushita Electric Works Ltd Device for firing discharge lamp
JPS59128798A (en) * 1983-01-13 1984-07-24 Toshiba Electric Equip Light compensating unit for high intensity discharge lamp
JPS59134020A (en) * 1983-01-19 1984-08-01 Toshiba Corp Headlight device for vehicle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04129849A (en) * 1990-09-21 1992-04-30 Nissan Motor Co Ltd Control device for vehicle headlamp
US6445135B2 (en) * 1999-11-02 2002-09-03 Mitsubishi Denki Kabushiki Kaisha Electric-discharge lamp control apparatus and electric-discharge lamp control method

Similar Documents

Publication Publication Date Title
JPH04155796A (en) Lighting circuit of discharge lamp for vehicle
KR900015583A (en) Discharge lamp lighting device
JPH038299A (en) Lighting circuit for high-pressure discharge lamp for vehicle
JPH04253182A (en) Lighting device for discharge lamp
JPS62292549A (en) Headlight for vehicle
EP0383692A3 (en) Circuit and method for controlling luminous intensity of discharge lamps
JPS62292548A (en) Headlight for vehicle
JPS6153871A (en) Fluorescent lamp blinking circuit
JPS6471095A (en) Discharge lamp lighting device
JPH03167789A (en) Discharge lamp lighting device
JPS58219545A (en) Lighting device
JPH02144898A (en) Discharge lamp lightup device
JPH01109248A (en) Lighting method
JPS6482494A (en) Lighting device with dimming function
JPH04272700A (en) Lighting device for discharge lamp
JPS5972866A (en) Illuminating device
JPS6482493A (en) Lighting device for discharge lamp
JPH04101394A (en) Lighting circuit
JPH03167799A (en) Dimmer discharge lamp lighting device
JPS60128040A (en) Apparatus for reducing light of indicator for vehicle
JPH04121996A (en) Lighting equipment and inverter thereof
JPS59176135A (en) Check lamp for headlight
JPS6337596A (en) High voltage discharge lamp lighting dimming circuit
JPH04314641A (en) Indicator lamp control circuit for vehicle
JPH0268235A (en) Discharge lamp lighting system for vehicle