D-c to d-c converter circuit

Electric lamp and discharge devices: systems – Pulsating or a.c. supply – With power factor control device

Reexamination Certificate

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Details

C315S082000, C315S307000

Reexamination Certificate

active

07825607

ABSTRACT:
A d-c to d-c converter circuit (DDCC) (10) that is comprised of a passive thin-film hybrid circuit that includes an input circuit (12), a voltage regulator circuit (14), a comparator circuit (16), an oscillator circuit (18) and an output circuit (20). The input circuit (12) is applied an input d-c voltage (11) from the vehicle's battery circuit (50). The input voltage (11) is converted by the DDCC (10) into an output d-c voltage (23) that is suitable to operate a set of LED tail lamps and/or a set of LED turn-signal lamps. The DDCC (10) is designed to replace a prior art heat-producing, voltage dropping resistive element (Rx) that drops the battery voltage to a suitable level to operate the LEDs. Additionally, the DDCC (10) is easily spliced into the vehicle's electrical wiring cable (54), requires a small mounting space and produces no significant heat.

REFERENCES:
patent: 4841198 (1989-06-01), Wilhelm
patent: 7593241 (2009-09-01), Kwon et al.
patent: 2003/0102819 (2003-06-01), Min et al.
patent: 2007/0229001 (2007-10-01), McIntosh et al.
patent: 2008/0130328 (2008-06-01), Choi

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