KR100625582B1 - Device for Driving Plasma Display Panel - Google Patents

Device for Driving Plasma Display Panel Download PDF

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Publication number
KR100625582B1
KR100625582B1 KR1020040071461A KR20040071461A KR100625582B1 KR 100625582 B1 KR100625582 B1 KR 100625582B1 KR 1020040071461 A KR1020040071461 A KR 1020040071461A KR 20040071461 A KR20040071461 A KR 20040071461A KR 100625582 B1 KR100625582 B1 KR 100625582B1
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KR
South Korea
Prior art keywords
electrode
voltage
switch
energy
path
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KR1020040071461A
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Korean (ko)
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KR20060022589A (en
Inventor
곽종운
김태형
문성학
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엘지전자 주식회사
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Priority to KR1020040071461A priority Critical patent/KR100625582B1/en
Priority claimed from EP05255467A external-priority patent/EP1632928A3/en
Publication of KR20060022589A publication Critical patent/KR20060022589A/en
Application granted granted Critical
Publication of KR100625582B1 publication Critical patent/KR100625582B1/en

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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/28Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • G09G3/288Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
    • G09G3/296Driving circuits for producing the waveforms applied to the driving electrodes
    • G09G3/2965Driving circuits for producing the waveforms applied to the driving electrodes using inductors for energy recovery

Abstract

The present invention relates to a plasma display panel, and more particularly, to a driving apparatus of a plasma display panel.
The present invention provides a Y electrode part for supplying and recovering positive energy using resonance and maintaining the first voltage, and a Z electrode part for supplying and recovering negative energy using resonance and maintaining the second voltage and Y. A first path through which the electrode part supplies and recovers positive energy through the Y electrode, a second path through which the Z electrode part supplies and recovers negative energy through the Z electrode, and a Y electrode part supplies positive energy to the Z electrode And the path forming part and the Y electrode part forming a fourth path for supplying and recovering the negative energy to the Y electrode and the third path for recovering and supplying the negative energy to the Y electrode. The first voltage holding part and the Z electrode part which maintain the ground after retaining and recovering the positive energy of the Y electrode part maintain the second voltage after supplying the negative energy to the Y electrode. After recovering comprises a second voltage holding part for holding the ground.
In the present invention as described above, the device rated voltage of the sustain circuit stage is lowered by using the half rated voltage. As a result, the circuit efficiency of the plasma display panel driving circuit can be increased.

Description

Device for driving plasma display panel {Device for Driving Plasma Display Panel}

1 is a perspective view showing the structure of a typical plasma display panel.

2 is an energy recovery circuit of a conventional plasma display panel;

3 is a waveform diagram of a sustain pulse in a conventional energy recovery circuit;

4 is an energy recovery circuit of the plasma display panel according to the embodiment of the present invention;

Fig. 5 is a waveform diagram of a sustain pulse in the energy recovery circuit of the embodiment of the present invention.

*** Explanation of symbols of main part of drawing ***

300: Y electrode part

310: path forming unit

320: Z electrode portion

330: second voltage holding unit

340: the first voltage holding unit

The present invention relates to a plasma display panel, and more particularly, to a driving apparatus of a plasma display panel.

In general, a plasma display panel displays an image including a character or a graphic by emitting phosphors by ultraviolet rays of 147 nm generated when the He + Xe or Ne + Xe inert mixed gas is discharged.

1 is a perspective view showing a structure of a general plasma display panel. As shown in FIG. 1, the Y electrode 12A and the Z electrode 12B formed on the upper substrate 10 of the plasma display panel and the X electrode 20 formed on the lower substrate 18 are provided. .

Each of the Y electrode 12A and the Z electrode 12B includes a transparent electrode and a bus electrode. The transparent electrode is formed of indium tin oxide (ITO). The bus electrode is formed of a metal for reducing resistance.

An upper dielectric layer 14 and a passivation layer 16 are stacked on the upper substrate 10 on which the Y electrode 12A and the Z electrode 12B are formed.

In the upper dielectric layer 14, wall charges generated during plasma discharge are accumulated. The protective layer 16 prevents damage to the upper dielectric layer 14 due to sputtering generated during plasma discharge, and increases emission efficiency of secondary electrons. The protective film 16 is usually formed of magnesium oxide (MgO).

Meanwhile, the lower dielectric layer 22 and the partition wall 24 are formed on the lower substrate 18 on which the X electrode 20 is formed. Phosphor layer 26 is applied to the surface of lower dielectric layer 22 and partition 24.

The X electrode 20 is formed in the direction crossing the Y electrode 12A and the Z electrode 12B. The partition wall 24 is formed in parallel with the X electrode 20 to prevent the ultraviolet rays and the visible light generated by the discharge from leaking to the adjacent discharge cells.

The phosphor layer 26 is excited by ultraviolet rays generated during plasma discharge to generate visible light of any one of red, green, and blue. An inert mixed gas such as He + Xe or Ne + Xe for discharging is injected into the discharge space of the discharge cells provided between the upper and lower substrates 10 and 18 and the partition wall 24.

2 is a conventional energy recovery circuit of a plasma display panel, and FIG. 3 is a waveform diagram of a sustain pulse in a conventional energy recovery circuit.

The conventional energy recovery circuit operates in largely four operation sequences.

In the first step, the first switch Q1 for the Y electrode and the fourth switch Q4 'for the Z electrode included in the energy recovery circuit 210 for the Y electrode are turned on, and the second to fourth switches Q2 for the Y electrode are turned on. Q3 and Q4 and the first to third switches Q1 ', Q2' and Q3 'for the Z electrode are turned off.

Accordingly, as shown in FIG. 3, the energy stored in the capacitor C S1 is supplied to the panel C P according to the resonance of the coil L1, and a sustain pulse voltage applied to the Y electrode (hereinafter, V PY ). This rises.

Next, in the second step, the second switch S2 for the Y electrode is turned on and the fourth switch Q4 'for the Z electrode is turned on, and the first switch Q1 for the Y electrode and the third for the Y electrode are next turned on. The switch Q3 and the fourth switch Q4 for the Y electrode are turned off. Accordingly, V PY maintains the sustain voltage V S.

Thereafter, in the third step, the third switch Q3 for the Y electrode is turned on and the fourth switch Q4 'for the Z electrode is turned on, and the first switch for the Y electrode, the third switch for the Y electrode, and The fourth switches Q1, Q3, and Q4 for the Y electrode are turned off.

As a result, energy stored in the capacitor C P is discharged to the capacitor C S in accordance with the resonance of the coil L1, and energy is recovered, and V PY drops.

Finally, in the fourth step, the fourth switch Q4 for the Y electrode is turned on and the fourth switch Q4 'for the Z electrode is turned on, and the first switch for the Y electrode, the second switch for the Y electrode, and the Y electrode are turned on. The third switches Q1, Q2, and Q3 for electrodes are turned off. As a result, V PY becomes the ground level.

Operation of the first to fourth switches Q1 'to Q4' for the Z electrode in the process of applying the sustain pulse to the Y electrode and the sustain pulse to the Z electrode through the above-described process. The operation sequence of the fourth switches Q1 to Q4 is the same.

The conventional energy recovery circuit uses LC resonance, but the charge charged in the capacitor C S1 corresponds to Vs / 2, which is half of the sustain voltage Vs, so that the efficiency of energy recovery is inferior.

In addition, the main aspects of the current plasma display panel driving circuit can be integrated with reliability and price. However, the conventional plasma display panel driving circuit has a disadvantage of being expensive due to the inefficient efficiency and reliability and the use of a high rated voltage device. .

The present invention is to solve the above problems, to lower the rated voltage of the device used to drive the sustain circuit, thereby providing a circuit driving efficiency, high reliability and low cost circuit.

To achieve the above object. The Y electrode part that supplies and recovers positive energy using resonance and maintains the first voltage and the Z electrode part and Y electrode part that supplies and recovers negative energy through resonance and maintains the second voltage The first path for supplying and recovering the energy through the Y electrode, the second path for the Z electrode supplying and recovering the negative energy through the Z electrode, and the Y electrode part for supplying and recovering the positive energy to the Z electrode. The third path and the Z electrode part to form a fourth path for supplying and recovering negative energy to the Y electrode, and the path forming part and the Y electrode part to supply the positive energy to the Z electrode, and then maintain the first voltage. After the electrode part recovers the positive energy, the first voltage holding part holding the ground and the Z electrode part supplying the negative energy to the Y electrode, and then maintaining the second voltage and the Z electrode part recovering the negative energy. And a second voltage holding part for holding the post ground. The first voltage is Vs / 2 and the second voltage is -Vs / 2 (where Vs is the sustain voltage).

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

4 is an energy recovery circuit of the plasma display panel according to the embodiment of the present invention.

The energy recovery circuit of the plasma display panel according to an exemplary embodiment of the present invention includes the Y electrode part 300, the Z electrode part 320, the path forming part 310, the first voltage holding part 340, and the second voltage holding part 330. It includes.

<Y electrode part>

The Y electrode unit 300 is a circuit that supplies and recovers positive energy through the Y electrode using resonance. In this case, the positive energy means energy corresponding to Vs / 4 charged in the capacitance Ca.

<Z electrode part>

The Z electrode part 320 is a circuit that supplies and recovers negative energy through the Z electrode by using resonance. In this case, the negative energy means energy corresponding to −Vs / 4 charged in the capacitance Cb.

〈Path formation unit〉

The path forming unit 310 is a circuit forming a path of the energy recovery circuit and forms a first path, a second path, a third path, and a fourth path. To this end, the path forming unit 310 includes four switches 5 to 8 (M5 to M8).

One end of the switch 5 M5 is connected to the Y electrode part 300 to receive a voltage of Vs / 2 from the Y electrode part 300 part.

One end of the switch 6 (M6) is connected to the other end of the switch 5 (M5).

Switch 7 M7 is connected to one end of switch 5 M5 and the other end is connected to one end of switch 8 M8.

The other end of the switch 8 (M8) is connected to the Z electrode part 320 to receive a -Vs / 2 voltage. The other end of switch 6 (M6) is connected to switch 8 (M8).

The first path or the fourth path is formed using the switches 5 to 8 (M5 to M8).

The first path is supplied with the positive energy of the Y electrode portion turned on to switch 1 (M1) and switch 5 (M5), and the switch 2 (M2) and switch 5 (M5) are turned on and recovered.

The second path is supplied with the negative energy of the Z electrode portion supplied with the switch 11 (M11) and the switch 8 (M8) turned on, and the switch 8 (M8) and the switch 12 (M12) turned on.

The third path is supplied with the positive energy of the Y electrode part being switched on with the switch 1 (M1) and the switch 7 (M7), and with the switch 2 (M2) and the switch (7) turned on.

The fourth path is supplied with the negative energy of the Z electrode portion supplied with the switches 11 (M11) and 6 (M6) turned on, and the switches 12 (M12) and 6 (M6) turned on and recovered.

<First voltage holding unit>

The first voltage holding part 340 maintains the first voltage after the Y electrode part 300 supplies positive energy to the Z electrode and maintains the ground after the Y electrode part 300 recovers the positive energy. Do. At this time, the first voltage is Vs / 2.

The first voltage holding part 340 includes a switch 15 (M15) and a switch 16 (M16).

One end of the switch 15 (M15) is connected to the other end of the switch 16 (M16) and one end of the switch 7 (M7) and the other end is connected to the ground.

One end of the switch 16 (M16) is connected to Vs / 2, and the other end is connected to one end of the switch 7 (M7) and one end of the switch 15 (M15).

<Second voltage holding section>

The second voltage holding part 330 maintains the second voltage after the Z electrode part 320 supplies negative energy to the Y electrode and maintains the ground after the Z electrode part 320 recovers the negative energy. . At this time, the second voltage is -Vs / 2.

The second voltage holding part 330 includes a switch 13 (M13) and a switch 14 (M14).

One end of the switch 13 (M13) is connected to the other end of the switch 14 (M14) and the other end of the switch 16 (M16) and the other end is connected to -Vs / 2.

One end of the switch 14 (M14) is connected to the ground and the other end is connected to one end of the switch 13 (M13) and the other end of the switch 16 (M16).

5 is a waveform diagram of a sustain pulse in the energy recovery circuit of the embodiment of the present invention.

Referring to FIGS. 4 and 5, FIG. 5 shows waveforms of the Y electrode and the waveform of the Z electrode.

The waveform of FIG. 5 and the circuit operation according to FIG. 5 may be divided into eight steps.

In the first step, the first switch M1 and the fifth switch M5 are turned on, and the switches in the energy recovery circuit for the remaining Y electrodes are turned off. At this time, the Y electrode is charged to the Y electrode of the panel as much as Vs / 2 is supplied to the Y electrode and the current charged in the capacitance (Ca) resonates with the coil.

On the other hand, in the energy recovery circuit for the Z electrode, the switch 8 (M8) and the switch 12 (M12) are turned on and the remaining switches in the energy recovery circuit for the Z electrode remain turned off. Then, the voltage of the Z electrode of the panel is decreased by -Vs / 2.

In the second step, switches 3 (M3) and 5 (M5) are turned on on the Y electrode side, and the remaining switches are turned off to maintain the Vs / 2 voltage applied to the Y electrode. The switch 10 (M10) and switch 8 (M8) are turned on on the Z electrode side, and the remaining switches are turned off to maintain the -Vs / 2 voltage applied to the Z electrode.

In the third step, switches 2 (M2) and 5 (M7) are turned on and the switch of the Y electrode part is turned off to recover the current stored in the panel back to the capacitance Ca. In this way, the Y electrode goes to the ground. In the Z electrode, the switch 8 (M8) and the switch 12 (M12) are turned on and the other switch in the Z electrode is turned off to recover the energy of the panel through the Z electrode to be ground at the voltage -Vs / 2.

In the fourth step, switch 4 (M4) and switch 5 (M5) turn on the Y electrode and turn off the remaining switches to keep the Y electrode of the panel at ground. On the Z electrode side, switch 9 (M9) and switch 8 (M8) are turned on and the other switches are turned off to maintain the Z electrode of the panel to ground.

In the fifth step, turn the switch 11 (M11) on the Z electrode side and switch 6 (M6) on the Y electrode side and turn off the remaining switches so that the voltage on the Y electrode side drops to -Vs / 2. do.

On the other hand, the Z electrode turns on the switch 1 (M1) on the Y electrode side and the switch 7 (M7) on the Z electrode side, and turns off the remaining switches so that the voltage of the Z pole becomes Vs / 2.

In the sixth step, the Y electrode turns on the switches 6 (M6) and 13 (M13) and turns off the remaining switches so that the Y electrode voltage of the panel is maintained at -Vs / 2.

The Z electrode turns on switches 7 (M7) and 16 (M16) and turns off the remaining switches so that the Z electrode voltage of the panel is maintained at Vs / 2.

In the seventh step, the Y electrode turns on the switch 6 (M6) and the switch 12 (M12) on the Z electrode side and turns off the remaining switches to make the voltage of the Y electrode from -Vs / 2 to ground.

In the Z electrode, switch 2 (M2) and switch 7 (M7) on the Z electrode side are turned on, and the remaining switches are turned off to recover current, so that the voltage Vs / 2 on the panel Z electrode is lowered to ground. .

In the eighth step, the Y electrode turns on the switches 6 (M6) and 14 (M14) and turns off the remaining switches so that the Y electrode maintains the ground.

The Z electrode turns on the switches 16 (M16) and 7 (M7) and turns off the remaining switches so that the Z electrode maintains the ground.

4 and 5 are as follows.

4 and 5 show a sustain circuit stage of the AC plasma display panel. In the sustain waveform by the circuit of this configuration, -Vs / 2 is applied to the Z electrode when Vs / 2 is applied to the Y electrode.

Similarly, when applying -Vs / 2 to the Y electrode, Vs / 2 is applied to the Z electrode. As such, Vs / 2 and -Vs / 2 are alternately generated at one electrode of the sustain electrode to create a sustain waveform. Compared to conventional circuits that only periodically generate a waveform of Vs at one electrode.

In the energy recovery circuit, only one electrode is used for the Y electrode and one electrode for the Z electrode. Although there are Vs / 2 and -Vs / 2 power supplies on the Y electrode and Vs / 2 and -Vs / 2 power supplies on the Z electrode, there is only one recovery circuit on each electrode, rather than one energy recovery circuit installed on each power supply. Normal sustain operation is possible.

As such, those skilled in the art will appreciate that the present invention can be implemented in other specific forms without changing the technical spirit or essential features thereof. Therefore, the above-described embodiments are to be understood as illustrative in all respects and not as restrictive.

The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

As described above, according to the present invention, the device rated voltage of the sustain circuit stage is lowered by using the half rated voltage. As a result, the circuit efficiency of the plasma display panel driving circuit can be increased.

Claims (5)

  1. A Y electrode unit for supplying and retrieving positive energy using resonance and maintaining a first voltage;
    A Z electrode part which supplies and recovers negative energy by using resonance and maintains a second voltage;
    A first path through which the Y electrode part supplies and recovers positive energy through the Y electrode, a second path through which the Z electrode part supplies and recovers negative energy through the Z electrode, and a positive path by the Y electrode part A path forming unit forming a third path for supplying and recovering energy to the Z electrode and a fourth path for supplying and recovering negative energy to the Y electrode;
    A first voltage holding part for maintaining a first voltage after the Y electrode part supplies positive energy to the Z electrode and maintaining the ground after the Y electrode part recovers positive energy; And
    And a second voltage holding unit configured to maintain a second voltage after the Z electrode unit supplies negative energy to the Y electrode and maintain the ground after the Z electrode unit recovers negative energy.
  2. The method of claim 1,
    And the first voltage is Vs / 2 (where Vs is a sustain voltage).
  3. The method of claim 1,
    And the second voltage is -Vs / 2, wherein Vs is a sustain voltage.
  4. The method of claim 1,
    The first voltage holding part includes two switches,
    The first voltage is supplied to one end of one of the two switches, one end of the other one of the two switches is connected to the other end of the one switch and the other end of the other switch is grounded And a plasma display panel drive device.
  5. The method of claim 1,
    The second voltage holding part includes two switches,
    The second voltage is supplied to one end of one of the two switches, one end of the other one of the two switches is connected to the other end of the one switch and the other end of the other switch is grounded And a plasma display panel drive device.
KR1020040071461A 2004-09-07 2004-09-07 Device for Driving Plasma Display Panel KR100625582B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020040071461A KR100625582B1 (en) 2004-09-07 2004-09-07 Device for Driving Plasma Display Panel

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
KR1020040071461A KR100625582B1 (en) 2004-09-07 2004-09-07 Device for Driving Plasma Display Panel
EP05255467A EP1632928A3 (en) 2004-09-07 2005-09-07 Energy recovery apparatus and method for a plasma display panel
US11/219,859 US20060050067A1 (en) 2004-09-07 2005-09-07 Plasma display apparatus and driving method thereof
JP2005259650A JP4699146B2 (en) 2004-09-07 2005-09-07 Plasma display device and driving method thereof
CNB2005101040064A CN100470618C (en) 2004-09-07 2005-09-07 Plasma display apparatus and driving method thereof

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KR20060022589A KR20060022589A (en) 2006-03-10
KR100625582B1 true KR100625582B1 (en) 2006-09-20

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100796692B1 (en) * 2006-09-20 2008-01-21 삼성에스디아이 주식회사 Plasma display, and driving device and method thereof

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CN100470618C (en) 2009-03-18
CN1746944A (en) 2006-03-15
KR20060022589A (en) 2006-03-10

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