Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2008-04-01
2008-04-01
Budd, Mark (Department: 2834)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C310S317000
Reexamination Certificate
active
10572734
ABSTRACT:
The present invention provides a piezoelectric transformer driving apparatus which drives a load balanced to the ground, which makes an insulating component, such as a current transformer or a photocoupler, unnecessary, and which can detect a load current. For this reason, the present invention has two secondary windings (1B,1C) which generate AC drive voltages respectively, a piezoelectric transformer (2) which generates a high voltage AC from the drive voltage generated by the secondary winding (1B) and applies this AC to one terminal of a cold-cathode tube (201), a piezoelectric transformer (3) which generates a high voltage AC of polarity reverse to the piezoelectric transformer (2) from the drive voltage generated by the secondary winding (1C), and applies this AC to the other terminal of the cold-cathode tube (201), and a detection part (4) which is connected between the secondary windings (1B) and (1C), in which a load current flowing into the cold-cathode tube (201) flows, and which detects this load current.
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Matsuo Yasuhide
Mizutani Akira
Budd Mark
LaPointe Dennis G.
Tamura Corporation
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