Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Periodic switch in the primary circuit of the supply...
Reexamination Certificate
2007-06-19
2007-06-19
Vu, David (Department: 2821)
Electric lamp and discharge devices: systems
Periodic switch in the supply circuit
Periodic switch in the primary circuit of the supply...
C315S224000, C315S279000
Reexamination Certificate
active
10913141
ABSTRACT:
A power supply system for liquid crystal monitors includes a first DC/AC converter (FBS, HBS) operating at predetermined frequency and duty-cycles and being fed by a second DC/DC converter (FC) which regulates the circuit voltage. The feeding system can feed all the fluorescent lamps (L, L1, LN) in the monitor through a bus connection which transmits the output sinusoidal voltage (SG1, SG2, SG3) from the first DC/AC converter (FBS, HBS) to the primary windings of a plurality of parallel connected piezoelectric transformers (PT, PT1, PT2, PTN, PT2N) which are connected with the fluorescent lamps (L, L1, LN).
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EPO Search Report.
Jeong H-S et al: “Parallel Driving of Piezoelectric Transformer” Japanese Journal Of Applied Physics, Publication Office Japanese Journal Of Applied Physics, Tokyo, JP, vol. 38, No. 9A, Part 1, Sep. 1999, pp. 5166-5169.
Buso Simone
Ongaro Andrea
Spiazzi Giorgio
Tomasin Paolo
Costigan James V.
Global Display Solutions S.p.A.
Hedman & Costigan
Vu David
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