JPS5718534A - Control circuit for illumination in car - Google Patents
Control circuit for illumination in carInfo
- Publication number
- JPS5718534A JPS5718534A JP9314080A JP9314080A JPS5718534A JP S5718534 A JPS5718534 A JP S5718534A JP 9314080 A JP9314080 A JP 9314080A JP 9314080 A JP9314080 A JP 9314080A JP S5718534 A JPS5718534 A JP S5718534A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- car
- output
- illumination
- door
- 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
Links
Landscapes
- Arrangements Of Lighting Devices For Vehicle Interiors, Mounting And Supporting Thereof, Circuits Therefore (AREA)
Abstract
PURPOSE: To save energy by allowing the keyhole illumination for the ignition key, outer steering key, etc. to work only while the driver or any passenger is in the car.
CONSTITUTION: When a driver gets into the car, an operation sensing signal b is emitted from an outer steering sensing circuit 3 to be placed in an AND circuit 4 as "H", and a signal from a door open sensing circuit 1, a, is placed in the circuit 4 upon being delayed by a delay circuit 2. Thereby, the illumination signal c from the circuit 4 will become "H" and drives a timer circuit 5 to put on the setting time of the transistor 6 as switching means, and thus the illuminator 7 will light up. The output of the circuit 1, a, is "H" when nobody is in the car and the output of the circuit 2, a', will remain "H" after the door is closed, and even when the output b becomes "H" after the car is left unmanned the output c will continue to be "L". Though the outputs b and a become "H" and "L", respectively, in the instance when the door is shut, the output c will not be in "H" in the very instance because of existence of the circuit 2, and the illuminator 7 will not light up.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9314080A JPS5718534A (en) | 1980-07-07 | 1980-07-07 | Control circuit for illumination in car |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9314080A JPS5718534A (en) | 1980-07-07 | 1980-07-07 | Control circuit for illumination in car |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5718534A true JPS5718534A (en) | 1982-01-30 |
JPS6364331B2 JPS6364331B2 (en) | 1988-12-12 |
Family
ID=14074213
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9314080A Granted JPS5718534A (en) | 1980-07-07 | 1980-07-07 | Control circuit for illumination in car |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5718534A (en) |
-
1980
- 1980-07-07 JP JP9314080A patent/JPS5718534A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6364331B2 (en) | 1988-12-12 |
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