Electric lamp and discharge devices: systems – Current and/or voltage regulation
Reexamination Certificate
2005-11-07
2008-12-09
Philogene, Haissa (Department: 2821)
Electric lamp and discharge devices: systems
Current and/or voltage regulation
C315S307000, C315S2090SC, C315S312000, C362S012000, C362S227000, C362S545000, C362S470000
Reexamination Certificate
active
07462993
ABSTRACT:
A dome light is disclosed which utilizes a rotating knob with ‘on’ and ‘off’ positions to toggle between having either a halogen bulb on or a plurality of red LEDs on, or both off. Dual D-type flip-flops toggle the dome light between states in response the changes of the knob between the ‘on’ and ‘off’ positions. The plurality of red LEDs utilize at least one current regulator to maintain a constant level of illumination. When the halogen bulb is on, further rotation of the knob varies a potentiometer which controls the duty cycle created by a pulse width modulator. The pulse width modulator causes the halogen bulb to be on for portions of each cycle; the longer the ‘on’ time during each cycle, the greater the apparent intensity of illumination by the halogen bulb.
REFERENCES:
patent: 3816739 (1974-06-01), Stolov
patent: 4677533 (1987-06-01), McDermott
patent: 5803579 (1998-09-01), Turnbull et al.
patent: 5984494 (1999-11-01), Chapman
patent: 6655752 (2003-12-01), Robertson et al.
patent: 6702452 (2004-03-01), Jigamian et al.
patent: 6858994 (2005-02-01), Vollrath
patent: 6948830 (2005-09-01), Petrick
patent: 6962423 (2005-11-01), Hamilton et al.
Brake Hughes Bellermann LLP
Kennedy Shane A.
Philogene Haissa
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