Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Reexamination Certificate
2006-11-28
2006-11-28
Ho, Tan (Department: 2821)
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
C315S367000, C315S369000
Reexamination Certificate
active
07141942
ABSTRACT:
Device for correcting the line and/or frame fields of a deflector for cathode ray tube comprising:a current sensor for evaluating the value of a line current Ila series of comparators intended to compare the value of the line current Il with reference valuesa current sensor for evaluating the value of the frame current Itan analogue/digital converter for converting the analogue value of the frame currenta programmed correction memory which is addressed by the output signals from the comparators and from the analogue/digital converter so as to deliver to at least one digital/analogue converter, data which are dependent on the addressing signalsa low-pass filter for filtering the output of the digital/analogue converterat least one correction coil for correcting the deflection fields of the deflector, and generating a correction field as a function of the output value from the low-pass filter.
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Search Report Dated Sep. 25, 2003.
Bellanger Jean-Luc
Perdriset Patrice
Petit Michel
Fried Harvey D.
Ho Tan
Laks Joseph J.
LaPeruta Richard
Le Tung
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