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US 7,486,256 B2Granted
Energy recovering apparatus and method and method of driving plasma display panel using the same
AssigneeLG Electronics Inc.
InventorYun Kwon Jung
Life of this patent
Estimating the term…
Abstract
An energy recovering apparatus for improving light-emission efficiency is disclosed. In the apparatus, a rectangular waveform supplier supplies a rectangular waveform to a panel capacitor. A tower waveform supplier supplies a tower waveform having any one shape of a sinusoidal waveform, a resonant waveform and a ripple waveform to the panel capacitor charged by said rectangular waveform.
Claims16
An energy recovering apparatus, comprising:
- a rectangular waveform supplier for supplying a rectangular waveform to a panel capacitor;
- and
- a tower waveform supplier for supplying a tower waveform having any one of a shape of a sinusoidal waveform, a resonant waveform or a ripple waveform to the panel capacitor charged by said rectangular waveform, wherein after a voltage level of the rectangular waveform remains substantially constant at a reference voltage for a first predetermined period of time, the tower waveform of the tower waveform supplier is supplied to the panel capacitor with the rectangular waveform for a second predetermined period of time to form a combined waveform, the tower waveform causing the combined waveform to have at least one voltage value greater than the reference voltage at which the rectangular waveform is held substantially constant.
An energy recovering apparatus, comprising:
- waveform to a panel capacitor;
- and
- a tower waveform supplier for supplying a tower waveform having any one of a shape of a sinusoidal waveform, a resonant waveform or a ripple waveform to the panel capacitor charged by said rectangular waveform, wherein the rectangular waveform supplier includes:
- a first switch forming a charge path for applying a voltage charged in a source capacitor to the panel capacitor;
- a second switch forming a recovery path for recovering a voltage charged in the panel capacitor into the source capacitor;
- a first inductor provided at the charge path and the recovery path to form a resonance circuit along with the panel capacitor;
- a third switch for supplying a voltage of a reference voltage source to the panel capacitor after a voltage from the source capacitor was charged in the panel capacitor;
- and
- a fourth switch for connecting the panel capacitor to a ground voltage source.
6 more elements
An energy recovering method, comprising:
- supplying a voltage which rises to a first voltage to a panel capacitor;
- keeping a voltage of the panel capacitor at said first voltage;
- supplying a tower waveform rising from said first voltage until a second voltage and falling from said second voltage to said first voltage;
- and supplying a ground voltage to the panel capacitor, wherein after the first voltage remains substantially constant at a reference voltage for a first predetermined period of time, the tower waveform is supplied to the panel capacitor for a second predetermined period of time to form a combined waveform, the tower waveform causing the combined waveform to have at least one voltage value greater than the reference voltage at which the rectangular waveform is held substantially constant.
1 more element
A method of driving a plasma display panel having a reset period, an address period and a sustain period, said method comprising:
- initializing a discharge cell during the reset period;
- selecting a discharge cell to be turned on during the address period;
- supplying a rectangular waveform and a tower waveform to a panel capacitor, the tower waveform having any one of a shape of a sinusoidal waveform, a resonant waveform or a ripple waveform rising from a peak voltage of said rectangular waveform to induce a discharge of the discharge cell, wherein after a voltage level of the rectangular waveform remains substantially constant at the peak voltage for a first predetermined period of time, the tower waveform is simultaneously supplied for a second predetermined period of time to form a combined waveform, the tower waveform causing the combined waveform to have at least one voltage value greater than the peak voltage at which the rectangular waveform remains substantially constant.
Dependencies are inferred from the claim text.