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| Title : Charge-controlled driving circuit for plasma display panel |
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Status |
Patented |
Part |
Elec/ET |
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Conditon |
Licensing |
Estimated Cost |
0 US$ |
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An energy recovery driving circuit is presented with an improved design which the power efficiency is increased by limiting the current during the sustain period of the plasma display panel (PDP). The circuit to be disclosed comprises a storage capacitor; charging device for providing a path of charge-flow when turned on, the charging means being connected to the storage capacitor; a resonance inductor that is connected to the charging device; an intermediate capacitor, connected to the resonance inductor to accomplish a LC resonance with the inductor, wherein the intermediate capacitor is charged up to at least a sustain voltage as a result of the LC resonance. The circuit further comprises switching device, connected between the intermediate capacitor and the panel capacitance, which turns on after the intermediate capacitor is charged to at least the sustain voltage so that the charge stored in the intermediate capacitor is transferred to the panel capacitance and the sustain discharge is fired.
What is claimed is:
1. A circuit for driving an AC plasma display panel having a panel capacitance during a sustain period, the driving circuit comprising: a storage capacitor; charging means for providing a path of charge-flow when turned on, the charging means being connected to said storage capacitor; a resonance inductor that is connected to the charging means; an intermediate capacitor, connected to the resonance inductor to accomplish LC resonance with the inductor, wherein the intermediate capacitor is charged up to at least a sustain voltage as a result of the LC resonance; switching means, connected between the intermediate capacitor and the panel capacitance, which turns on after the intermediate capacitor is charged to at least the sustain voltage so that the charge stored in the intermediate capacitor is transferred to the panel capacitance and the sustain discharge is fired; and wherein the amount of the current flowing into the panel during the sustain period is limited because it is supplied from the limited charge stored in the intermediate capacitor.
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DOWON INTERNATIONAL
5F. Shinwon Bldg. 823-14, Yeoksam-dong, Kangnam-ku, SEOUL, 135-080
KOREA
PHONE : 82-2-501-3106 FAX : 82-2-501-3109 e-mail : patyellow@dowon.com
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