US 6,617,802 B2 · Apparatus for recovering energy using magnetic coupled inductor in plasma display panel driving system and method for designing the same

Abstract

An apparatus for recovering energy using a magnetic coupled inductor so as to drive a plasma display panel (PDP) and a method for designing the same. Accordingly, reactive power and heat dissipation amount are reduced without having an additional isolation gate driver. The apparatus improves the recovery rate of the reactive power by applying the magnetic coupled inductor to an energy recovering circuit at the time of charging/discharging the PDP and by connecting the source electrode of a switching device in the energy recovering circuit to the ground. In addition, the apparatus reduces electromagnetic interference (EMI) by reducing switching loss to zero and by not generating a sudden change in panel voltage. The apparatus further simplifies the circuit structure of a gate drive terminal and reduces the number of circuit elements compared to an existing PDP drive circuit.

Claims16

Dependent claims

An apparatus for recovering energy using a magnetic coupled inductor in a plasma display panel (PDP) driving system, the energy recovering apparatus comprising:

first and second switches for switching on and off an electrical connection between an input terminal and ground in correspondence to a predetermined energy recovering sequence switching control signal;
and
a magnetic coupled inductor in which first and second coils are magnetically coupled by respectively connecting first terminals of the first and second coils to both terminals of a PDP and by respectively connecting second terminals of the first and second coils to input terminals of the first and second switches.

A plasma display panel (PDP) driving device having a switching sequence, which repeats a reset section, an address section, and a sustain section, the PDP driving device comprising:

a Y-electrode sustain switching circuit for applying a rectangular wave voltage of high frequency to a Y-electrode of a PDP for the sustain section;
a separation circuit for separating circuit operations of the sustain section, the address section, and the reset section;
a Y-electrode ramp waveform generation circuit for applying a ramp type high voltage to the Y-electrode of the PDP for the reset section;
a scan pulse generation circuit, which applies a horizontal synchronizing signal to the address section;
an X-electrode sustain switching circuit for applying the rectangular wave voltage of high frequency to an X-electrode of the PDP for the sustain section;
an X-electrode ramp waveform generation circuit for applying the ramp type high voltage to the X-electrode of the PDP for the reset section;
and
an energy recovering circuit, which is formed of a magnetic coupled inductor connected at both terminals of the PDP at the time of charging/discharging the PDP in the sustain section,
wherein the switching sequence is controlled so as to linearly charge/discharge the voltage of the PDP.

6 more elements

Dependencies are inferred from the claim text.

Apparatus for recovering energy using magnetic coupled inductor in plasma display panel driving system and method for designing the same

Life of this patent

Apparatus for recovering energy using magnetic coupled inductor in plasma display panel driving system and method for designing the same

Life of this patent

Abstract

Claims16