The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 23, 2007
Filed:
Dec. 18, 2002
Heinz Van Der Broeck, Zülpich, DE;
Matthias Wendt, Würselen, DE;
Heinz Van Der Broeck, Zülpich, DE;
Matthias Wendt, Würselen, DE;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A circuit arrangement for commutating the AC voltage of a plasma display panel, in which the losses and electro-magnetic interference which occur as a result of the influence of parasitic resistances (coils, supply lines, semiconductor switches) and the attendant hard charging and discharging processes, are substantially avoided. For the charging operation of the capacitor (Cp) of the plasma cells the oscillation circuit is supplied with an auxiliary charging voltage (u) whose value exceeds 50% of the input voltage (U). The oscillation circuit for the discharging operation is supplied with an auxiliary discharging voltage (u) whose value falls short of 50% of the input voltage (U). The two auxiliary voltages are connected to a DC converter.