Electric lamp and discharge devices: systems – Current and/or voltage regulation
Reexamination Certificate
2008-04-29
2008-04-29
Tran, Thuy V. (Department: 2821)
Electric lamp and discharge devices: systems
Current and/or voltage regulation
C315S282000, C345S102000
Reexamination Certificate
active
11473789
ABSTRACT:
A device for driving a light source (L11) including a first lamp (a1) and a second lamp (a2) includes two power supply circuits, two transformers (12, 12′), and two current balancing components (13, 13′). Each power supply circuit includes a direct current (DC) power source (10or10′) and a DC to alternating current (AC) converter (11or11′). The DC/AC converters convert DC signals received from the corresponding DC power sources to AC signals. The transformers correspondingly convert the AC signals to other AC signals. The current balancing components are respectively connected between the transformers and the lamps. The feedback circuits correspondingly feed back current flowing through the lamps to the DC/AC converters.
REFERENCES:
patent: 6420839 (2002-07-01), Chiang et al.
patent: 6534934 (2003-03-01), Lin et al.
patent: 6781325 (2004-08-01), Lee
Fan Chiang Che-Chen
Lee Chi-Hsiung
Liu Kuo-Chi
Meng Tien-Hsiang
Hon Hai Precision Industry Co. Ltd.
Morris Manning & Martin LLP
Tingkang Xia, Esq. Tim
Tran Thuy V.
Vu Jimmy T
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