Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Reexamination Certificate
2006-04-18
2006-04-18
Tran, Thuy Vinh (Department: 2821)
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
C315S395000, C315S411000, C348S730000
Reexamination Certificate
active
07030575
ABSTRACT:
A video display includes a scanner operable at a first frequency and a higher second frequency. A switch mode power supply drives a transformer with three secondaries. First and second rectifiers & filters are associated with the first and second secondaries. A rectifier is coupled to the third secondary and by way of a switch to the first filter. Feedback from the first filter controls the SMPS. In a first operating mode, the scanner is operated at the first frequency, the switch is open, the scanner supply is a first voltage from the first filter, and ancillary equipment is supplied with a third voltage by the second filter. In a second operating mode, the scanner is operated at the second frequency, the switch is closed, the scanner supply is a second voltage, higher than the first, from the first filter, and ancillary equipment is supplied with the same third voltage.
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Copy of Search Report Dated Sep. 28, 2003.
Choksi Snehali
Gries Robert Joseph
Jackson David Ross
Watson, III Robert Goah
Williams Kevin Michael
Fried Harvey D.
Johnson Christine
Thomson Licensing
Tran Thuy Vinh
Tripoli Joseph S.
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