Vehicle LED lamp controller used in low temperature environment

Details Vehicle LED lamp controller used in low temperature environment Vehicle LED lamp controller used in low temperature environment

2006-03-15

2009-08-18

Huber, Paul (Department: 2627)

Electric lamp and discharge devices: systems

Special application

Vehicle

C362S545000

Reexamination Certificate

active

07576493

ABSTRACT:
A vehicle LED lamp controller connected between one DC power source and multiple LED elements has a starting circuit, a preheating circuit and a current limitation circuit. The starting circuit is connected to the power source through the preheating circuit and connected to the multiple LED elements. The preheating circuit provides a continuous small current to the multiple LED elements to preheat the LED elements when the preheating circuit detects the temperature environment is low. The current limitation circuit is connected between the DC power source and multiple LED elements to automatically connect or disconnect a connection between the multiple LED elements and the DC power source according to changes of current supplied to the multiple LED elements. Therefore, the present invention provides a safety circuit loop.

REFERENCES:
patent: 2005/0200287 (2005-09-01), Ito et al.
patent: 2005/0236999 (2005-10-01), Ito et al.
patent: 2006/0082332 (2006-04-01), Ito et al.

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