# US 7,609,233 B2 · Plasma display device and driving apparatus thereof

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- Number: US 7,609,233 B2
- Document ID: US7609233B2
- Status: Granted
- Kind: B2
- Application number: 11/346,922
- Filed: 2006-02-02
- Published: 2006-11-30
- Granted: 2009-10-27
- Earliest claimed: 2005-05-25
- Assignees: Samsung SDI Co., Ltd.
- Inventors: Jin-Ho Yang; Woo-Joon Chung; Seong-Joon Jeong; Tae-Seong Kim
- Web page: https://patentgrep.com/patent/US7609233B2

## CPC

- G09G 3/2965: {using inductors for energy recovery}
- G09G 3/296: Driving circuits for producing the waveforms applied to the driving electrodes
- G09G 2330/021: Power management, e.g. power saving
- G09G 2330/028: Generation of voltages supplied to electrode drivers in a matrix display other than LCD
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)

## Abstract

A sustain or scan electrode driver for a plasma display device including a power recovery circuit, a voltage storage circuit, and a switching circuit. Power recovery is achieved by a coupling a power source at a minus sustain voltage to the sustain or scan electrode driver circuit that includes a capacitor and an inductor for creating resonance with the panel capacitor and recovering the power used in sustain discharge. Power loss of switches used in the driver circuit may be reduced and power recovery efficiency may be increased by using an additional capacitor in the driver circuit that maintains terminals of the switch at a predetermined level.

## Claims

### Claim 1

A plasma display device comprising:
a plurality of electrodes comprising a first electrode;
a first switch having a first terminal electrically coupled to a first power source for supplying a first voltage;
a first diode having a cathode coupled to a second terminal of the first switch;
a second switch having a first terminal electrically coupled to the first power source;
a second diode having an anode coupled to a second terminal of the second switch;
at least one inductor having a first terminal electrically coupled to an anode of the first diode and a cathode of the second diode, and having a second terminal electrically coupled to the first electrode;
a first capacitor having a first terminal coupled to the second terminal of the second switch;
a third switch having a first terminal electrically coupled to a second terminal of the first capacitor, and a second terminal coupled to the first electrode;
a fourth switch having a first terminal coupled to a second power source for supplying a second voltage less than the first voltage, and a second terminal electrically coupled to the first electrode;
a second capacitor having a first terminal coupled to the first terminal of the third switch, and a second terminal coupled to a third power source for supplying a third voltage; and
a third diode having an anode coupled to the second terminal of the first switch, and a cathode coupled to the second terminal of the first capacitor.

### Claim 2 (depends on 1)

The plasma display device of claim 1, further comprising a fourth diode having a cathode coupled to the first terminal of the second capacitor and an anode coupled to the second terminal of the first capacitor.

### Claim 3 (depends on 1)

The plasma display device of claim 1, further comprising a fifth switch having a first terminal electrically coupled to the first terminal of the first capacitor and a second terminal electrically coupled to the second power source.

### Claim 4 (depends on 1)

The plasma display device of claim 1, wherein, during a sustain period:
a voltage at the first electrode is increased by turning on the second switch;
a fourth voltage higher than the first voltage is applied to the first electrode by turning on the third switch;
the voltage at the first electrode is reduced by turning on the first switch;
and the second voltage is applied to the first electrode by turning on the fourth switch.

### Claim 5 (depends on 4)

The plasma display device of claim 4, wherein a difference between the second voltage and the fourth voltage is double a difference between the first voltage and the second voltage.

### Claim 6 (depends on 1)

The plasma display device of claim 1, wherein the third voltage equals the first voltage.

### Claim 7 (depends on 5)

The plasma display device of claim 5, wherein the first voltage is a ground voltage.

### Claim 8

A driver of a plasma display device, the driver for applying a voltage to a plurality of electrodes comprising a first electrode, the driver comprising:
a first switch having a first terminal electrically coupled to a first power source for supplying a first voltage;
a second switch having a first terminal electrically coupled to the first power source;
at least one inductor having a first terminal electrically coupled to the first electrode;
a voltage falling path for reducing a voltage at the first electrode when the first switch is turned on, the voltage falling path being coupled between a second terminal of the first switch and a second terminal of the inductor;
a voltage rising path for increasing the voltage at the first electrode when the second switch is turned on, the voltage rising path being coupled between a second terminal of the second switch and the second terminal of the inductor;
a first capacitor having a first terminal coupled to the second terminal of the second switch;
a third switch having a first terminal electrically coupled to a second terminal of the first capacitor, and a second terminal electrically coupled to the first electrode;
a fourth switch having a first terminal coupled to a second power source for supplying a second voltage less than the first voltage, and a second terminal electrically coupled to the first electrode;
a second capacitor having a first terminal coupled to the first terminal of the third switch, and a second terminal coupled to a third power source for supplying a third voltage; and
a charging path for charging the first capacitor, the charging path being formed by electrically coupling the second terminal of the first capacitor to the first power source and electrically coupling the first terminal of the first capacitor to the second power source.

### Claim 9 (depends on 8)

The driver of claim 8, wherein:
the voltage falling path comprises a first diode having a cathode coupled to the second terminal of the first switch and an anode coupled to the second terminal of the inductor; and
the voltage rising path comprises a second diode having an anode coupled to the second terminal of the second switch and a cathode coupled to the second terminal of the inductor.

### Claim 10 (depends on 8)

The driver of claim 8, wherein the charging path comprises a diode having an anode coupled to the first power source and a cathode electrically coupled to the second terminal of the first capacitor.

### Claim 11 (depends on 10)

The driver of claim 10, wherein the charging path further comprises a fifth switch having a first terminal electrically coupled to the first terminal of the first capacitor and a second terminal electrically coupled to the second power source.

### Claim 12 (depends on 8)

The driver of claim 8, further comprising a diode having a cathode coupled to the first terminal of the second capacitor and an anode coupled to the second terminal of the first capacitor.

### Claim 13 (depends on 8)

The driver of claim 8, wherein the third voltage equals the first voltage.

### Claim 14 (depends on 13)

The driver of claim 13, wherein the first voltage is a ground voltage.