JPS5695734A - Method for lighting head lamp - Google Patents

Method for lighting head lamp

Info

Publication number
JPS5695734A
JPS5695734A JP17288479A JP17288479A JPS5695734A JP S5695734 A JPS5695734 A JP S5695734A JP 17288479 A JP17288479 A JP 17288479A JP 17288479 A JP17288479 A JP 17288479A JP S5695734 A JPS5695734 A JP S5695734A
Authority
JP
Japan
Prior art keywords
lamp
main lamp
transistor
lighting
capacitor
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
JP17288479A
Other languages
Japanese (ja)
Inventor
Kimiaki Ishikawa
Masatoshi Sugasawa
Kiyoshi Wada
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.)
Koito Manufacturing Co Ltd
Original Assignee
Koito Manufacturing 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 Manufacturing Co Ltd filed Critical Koito Manufacturing Co Ltd
Priority to JP17288479A priority Critical patent/JPS5695734A/en
Publication of JPS5695734A publication Critical patent/JPS5695734A/en
Pending legal-status Critical Current

Links

Landscapes

  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

PURPOSE: To reduce the intensity of a main lamp by degrees or gradually for keeping a safety drive when the main lamp is switched off to light a small lamp, by charging a capacitor when the main lamp or the small lamp is closed and lighting the main lamp by the use of the charging current at the switching time.
CONSTITUTION: When a lighting switch LS is turuned on and a movable contact X of a dimmer switch DS sticks to a contact point Z, a capacitor C1 is charged. While a current flows through a power supply E, the LS, the DS, a resistor R1, a transistor Tr1, a main lamp ML, and the earth, the main lamp MI is lighted. At this time, the small lamp SL is not lighted because a transistor Tr2 is biased in the reverse direction. When the DS is turned to contact a point Y, the capacitor C1 is dischaged. While the discharged current runs through a loop consisting of the C1, the R1, the Tr1, the main lamp ML, and the earth to lgiht the main lamp ML, the transistor Tr2 begins to be gradually turned on and a transistor Tr3 is synchronously on to start a lighting of the small lamp SM.
COPYRIGHT: (C)1981,JPO&Japio
JP17288479A 1979-12-28 1979-12-28 Method for lighting head lamp Pending JPS5695734A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17288479A JPS5695734A (en) 1979-12-28 1979-12-28 Method for lighting head lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17288479A JPS5695734A (en) 1979-12-28 1979-12-28 Method for lighting head lamp

Publications (1)

Publication Number Publication Date
JPS5695734A true JPS5695734A (en) 1981-08-03

Family

ID=15950098

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17288479A Pending JPS5695734A (en) 1979-12-28 1979-12-28 Method for lighting head lamp

Country Status (1)

Country Link
JP (1) JPS5695734A (en)

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