Circuit arrangement for the AC power supply of a plasma...

Details Circuit arrangement for the AC power supply of a plasma... Circuit arrangement for the AC power supply of a plasma...

2007-10-23

2007-10-23

Hjerpe, Richard (Department: 2629)

Computer graphics processing and selective visual display system

Display driving control circuitry

Display power source

C345S212000, C345S060000, C345S063000, C345S052000, C345S066000, C713S300000, C348S730000

Reexamination Certificate

active

10500762

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 (u1) whose value exceeds 50% of the input voltage (U0). The oscillation circuit for the discharging operation is supplied with an auxiliary discharging voltage (u2) whose value falls short of 50% of the input voltage (U0). The two auxiliary voltages are connected to a DC converter.

REFERENCES:
patent: 5844373 (1998-12-01), Yao et al.
patent: 6011355 (2000-01-01), Nagai
patent: 6657604 (2003-12-01), Huang et al.
patent: 2001/0023488 (2001-09-01), Breunig et al.

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