Title:
CONTROL DEVICE FOR ILLUMINATING LAMP OF VEHICLE
Document Type and Number:
Japanese Patent JPS63184538
Kind Code:
A
Abstract:
PURPOSE:To prevent influence of noise on audio or the like and enable the brightness of illumination lamps to be controlled by connecting a voltage control circuit to a pulse control circuit via an amplifying circuit, and connecting the voltage control circuit to the illumination lamp of audio or the like. CONSTITUTION:When a lighting switch S is closed, a pulse of duty ratio, which is set by a variable resistance VR1 is outputted from a pulse control circuit 1, and the pulse is amplified by the transistor Q0 of an amplifying circuit 2 so as to make a transistor Q1 for driving a lamp to be turned on. In such a device as mentioned above a voltage control circuits 4 is installed while being provided with a transistor Q2 which is actuated in synchronization with the transistor Q1, a condenser C1 which is adapted to integrate the output of the transistor Q2 and a transistor Q3 which is controlled by a terminal voltage thereof etc. And an illuminating lamp L2 is connected to the emitter side of the transistor Q3, and any influence of noise on audio or the like is prevented by controlling the voltage thereof.
Inventors:
FUJII TOSHIYUKI
OBARA HIFUMI
OBARA HIFUMI
Application Number:
JP1426087A
Publication Date:
July 30, 1988
Filing Date:
January 26, 1987
Export Citation:
Assignee:
STANLEY ELECTRIC CO LTD
International Classes:
B60Q1/00; B60Q3/04; H05B37/02; (IPC1-7): B60Q1/00; B60Q3/04; H05B37/02
Domestic Patent References:
| JPS59195436A | 1984-11-06 | |||
| JP60121948B |
Attorney, Agent or Firm:
Hiroyuki Niwa