Driving circuit for radio frequency plasma display panel
AssigneeLG Electronics Inc.
InventorJeong Pil Choi
Life of this patent
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Abstract
A driving circuit for a radio frequency plasma display panel that is capable of effectively making an impedance matching between a radio frequency signal generator and a panel. In the circuit, radio frequency electrode lines are divided into a plurality of groups. A plurality of impedance matchers are independently connected to each group of the radio frequency electrode lines to match impedance of input and output terminals thereof. Accordingly, an impedance difference between the radio frequency electrode lines caused by a length difference of radio frequency supply lines is uniformly compensated, so that a maximum power of radio frequency signal can be applied to each radio frequency electrode line to provide a stable operation of the panel as well as to improve a picture quality.
Claims19
A driving circuit for a plasma display panel using a radio frequency discharge, comprising:
- a radio frequency generator which applies radio frequency signals to a plurality of radio frequency electrode lines;
- one or more radio frequency amplifiers which amplify the radio frequency signals;
- and
- a plurality of impedance matching means for matching impedance between the amplified radio frequency signals and the plasma display panel, wherein the radio frequency electrode lines are divided into a plurality of groups and the plurality of impedance matching units have different impedance values in accordance with a length difference between radio frequency supply lines connected from the radio frequency generator to said groups.
A radio frequency driving circuit for a plasma display panel using a radio frequency discharge, comprising:
- a radio frequency generator which applies radio frequency signals to a plurality of radio frequency electrode lines;
- one or more radio frequency amplifiers which amplify the radio frequency signals;
- impedance matching means for matching impedance between the amplified radio frequency signals and the plasma display;
- a detector which detects a brightness level of an image signal input to the plasma display panel;
- and
- a controller which adjusts an impedance matching level of the impedance matcher in accordance with the detected brightness level.
A system for driving a plasma panel display, comprising:
- a plurality of impedance matchers connected to respective ones of a plurality of RF electrodes in the plasma panel display, each of said impedance matchers matching an impedance of an input terminal with an impedance of a respective one of the RF electrodes;
- and
- a plurality of signal lines, each of said signal lines connecting one of said impedance matchers to a respective one of the RF electrodes, said signal lines have substantially a same length.
A system for driving a plasma panel display, comprising:
- a plurality of impedance matchers connected to respective ones of a plurality of RF electrodes in the plasma panel display, each of said impedance matchers matching an impedance of an input terminal with an impedance of a respective one of the RF electrodes, wherein at least one of the impedance matchers matches impedance by an amount sufficient to allow a maximum signal to be input into a respective RF electrode.
A system for driving a plasma panel display, comprising:
- a first impedance matcher connected to a first plurality of RF electrodes in the plasma display panel;
- a second impedance matcher connected to a second plurality of RF electrodes in the plasma display panel, wherein said second plurality of RF electrodes are different electrodes from the first plurality of RF electrodes, and wherein the first impedance matcher matches an impedance of an input terminal with impedances of the first plurality of RF electrodes.
A system for driving a plasma display panel, comprising:
- an impedance matcher connected between an input terminal and the plasma display panel, said impedance matcher matching an impedance of the input terminal with an impedance of an RF electrode in the plasma display panel based on a brightness correction value.
Dependencies are inferred from the claim text.