JPS5695734A - Method for lighting head lamp - Google Patents
Method for lighting head lampInfo
- 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
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
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) |
-
1979
- 1979-12-28 JP JP17288479A patent/JPS5695734A/en active Pending
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