Lighting control device of lighting device for vehicle

Details Lighting control device of lighting device for vehicle Lighting control device of lighting device for vehicle

2011-04-05

2011-04-05

Tran, Thuy Vinh (Department: 2821)

Electric lamp and discharge devices: systems

Special application

Vehicle

C315S219000, C315S299000, C315S308000, C315S313000, C307S010800

Reexamination Certificate

active

07919925

ABSTRACT:
In a process in which a control signal having a low level is output from an ON/OFF control circuit to series regulators connected to LEDs serving as lighting targets to turn ON the LEDs in accordance with digital communication information, the ON/OFF control circuit calculates a specified current value to be supplied to the LEDs serving as the lighting targets and compares the specified current value with a detected current value which is detected by a current detecting circuit, and outputs a stop signal to a control circuit on the assumption that a current flows without the series regulators with grounding generated on a cathode side of any of LEDs when the detected current value is greater than the specified current value. When the control circuit turns OFF an NMOS transistor in response to the stop signal, an operation of a switching regulator is stopped.

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Abstract of JP2006-103477, Data supplied from the esp@cenet database—Worldwide, on Jul. 1, 2008, 1 page.
Abstract of JP2007-22104, Data supplied from the esp@cenet database—Worldwide, on Jul. 1, 2008, 1 page.

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