KR20040068418A - Apparatus for driving of plasma display panel - Google Patents

Abstract

PURPOSE: An apparatus for driving a plasma display panel is provided to reduce size of a data board by separating a data driver from the data board. CONSTITUTION: A display panel is provided with pixel cells formed on a crossing portion of first and second sustain electrodes for a discharge and a data electrode in a matrix form. A data driver module(168) drives the data electrode. A data board(170) is connected to the data electrode and the data driver module. The data driver module includes a data driver for driving the data electrode and an energy recovery circuit(160). The energy recovery circuit is connected to the data driver to reduce power consumption upon driving the data electrode. The data board includes ports(172), buffers(152), first connectors(154), and second connectors(150).

Description

A device for driving a plasma display panel {APPARATUS FOR DRIVING OF PLASMA DISPLAY PANEL}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving device of a plasma display panel, and more particularly, to reduce the size of the data board by separating the data driver from the data board, and to use the data board in common according to the size of the plasma display panel. It relates to a driving device of.

Plasma Display Panel (hereinafter referred to as "PDP") is a character or graphic by emitting phosphors by 147nm ultraviolet rays generated when discharge of inert gas such as He + Xe, Ne + Xe and He + Ne + Xe. The image including the is displayed. Such a PDP is not only thin and easy to enlarge, but also greatly improved in quality due to recent technology development. In particular, the three-electrode AC surface discharge type PDP has advantages of low voltage driving and long life because wall charges are accumulated on the surface during discharge and protect the electrodes from sputtering caused by the discharge.

Referring to FIG. 1, a discharge cell of a conventional three-electrode AC surface discharge type PDP is orthogonal to a sustain electrode pair including a scan electrode 30Y and a sustain electrode 30Z formed on an upper substrate 10, and a sustain electrode pair. The address electrode 20X formed on the lower substrate 18 is provided.

Each of the scan electrode 30Y and the sustain electrode 30Z has a structure in which transparent electrodes 12Y and 12Z and metal bus electrodes 13Y and 13Z are stacked. The upper dielectric layer 14 and the MgO passivation layer 16 are stacked on the upper substrate 10 having the scan electrode 30Y and the sustain electrode 30Z side by side. Wall charges generated during plasma discharge are accumulated in the upper dielectric layer 14. 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. As the protective film 16, magnesium oxide (MgO) is usually used. The lower dielectric layer 22 and the partition wall 24 are formed on the lower substrate 18 on which the data electrode 20X is formed, and the phosphor layer 26 is coated on the surfaces of the lower dielectric layer 22 and the partition wall 24. An inert mixed gas such as He + Xe, Ne + Xe, He + Xe + Ne is injected into the discharge space provided between the upper and lower substrates 10 and 18 and the partition wall 24.

The data electrode 20X is formed in a direction crossing the scan electrode 30Y and the sustain electrode 30Z. The partition wall 24 is formed in parallel with the data electrode 20X to prevent ultraviolet rays and visible light generated by the discharge from leaking to the adjacent discharge cells. The phosphor 26 is excited by ultraviolet rays generated during plasma discharge to generate visible light of any one of red, green, and blue.

Referring to FIGS. 2A and 2B, a driving apparatus of a PDP according to the related art includes m × n discharge cells 11 having scan electrode lines Y1 to Ym, sustain electrode lines Z1 to Zm, and data. PDP 30 arranged in a matrix so as to be connected to electrode lines X1 to Xn, scan driver 32 for driving scan electrode lines Y1 to Ym, and sustain electrode lines Z1 to The sustain driver 34 for driving Zm, the data driver 36 for driving the data electrode lines X1 to Xn, the scan driver 32, the sustain driver 34, and the data driver 36. And a control unit 38 for supplying a control signal for controlling driving of the power supply unit, and a power supply unit 40 for supplying driving power for each driving unit.

The power supply unit 40 generates drive power for driving the scan driver 32, the sustain driver 34, the data driver 36, the controller 38, and the like using an external power source from the outside.

The controller 38 controls driving timing of each of the scan driver 32, the sustain driver 34, and the data driver 36.

The scan driver 32 sequentially supplies scan pulses and sustain pulses to the scan electrode lines Y1 to Ym using scan driver ICs (not shown) to sequentially scan the discharge cells 11 line by line. And discharge in each of the m × n discharge cells 11 is continued.

The sustain driver 34 supplies sustain pulses to all of the sustain electrode lines Z1 to Zm using scan driver ICs (not shown).

The data driver 36 supplies image data to the data electrode lines X1 to Xn in synchronization with the scan pulse. To this end, the data driver 36 is mounted on one side of the data board 70, the data driver 56 mounted on the data board 70, and the data board 70 as illustrated in FIG. 3. Data signals of the PDP 30 are mounted on one side of the first connector 54 and the data board 70 for supplying the control signals from the 38 to the data driver 56. A plurality of second connectors 50 output through the lines X1 to Xn, and are mounted on one side of the data board 70 and connected between the data driver 56 and the second connectors 50 to be connected to the data driver. A plurality of buffer ICs 52 are buffered and relayed to the second connectors 50 for various signals from 56.

The first connector 54 is connected to the control unit 38 and is connected to the data driver 56 to supply the control driver, image data, and the like, supplied from the control unit 38 to the data driver 56.

The data driver 56 includes an energy recovery circuit 60 for reducing power consumption of the data driver 56. The data driver 56 converts the image data from the control unit 38 into final image data using the energy recovery circuit 60, and converts the converted final image data in response to a control signal from the control unit 38. Supply to data electrode lines X1 to Xn.

Each of the plurality of buffer ICs 52 buffers the final image data supplied from the data driver 56 and supplies the buffered final image data to the second connectors 50.

Each of the second connectors 50 is connected to a plurality of buffer ICs 52 and connected to a data chip on film (not shown) connected to the data electrode lines X1 to Xn. The final image data supplied from the buffer ICs 52 is supplied to the data chip on film.

Accordingly, the final image data generated by the data driver 56 is supplied to the data electrode lines X1 to Xn through the plurality of buffer ICs 52, the second connectors 50, and the data chip on film. .

In the driving apparatus of the PDP according to the related art, the data driver 36 may include circuits such as a first connector 54, a data driver 56, a plurality of buffer ICs 52, and second connectors 50. Since the size of the data board 70 is increased. In addition, since the configuration of the data board varies according to the size of the PDP in the driving apparatus of the PDP according to the prior art, there is a disadvantage in that the data board must be manufactured separately according to the size of the PDP.

Accordingly, an object of the present invention is to provide a driving apparatus of a plasma display panel that separates a data driver from a data board, thereby reducing the size of the data board and allowing the data board to be used in common according to the size of the plasma display panel. .

1 is a perspective view showing a discharge cell structure of a conventional three-electrode AC surface discharge plasma display panel.

FIG. 2A is a view showing an arrangement of electrode lines and discharge cells of the PDP shown in FIG. 1;

2B is a view showing a driving device of a plasma display panel according to the prior art.

FIG. 3 is a view showing the data driver shown in FIGS. 2A and 2B.

4 is a diagram illustrating a driving apparatus of a plasma display panel according to an exemplary embodiment of the present invention.

FIG. 5 is a diagram illustrating a data driver shown in FIG. 4. FIG.

FIG. 6 illustrates an energy recovery circuit integrated in the data driver module shown in FIG. 5; FIG.

<Description of Symbols for Main Parts of Drawings>

10: upper substrate 11: discharge cell

32Y: scan electrode 32Z: sustain electrode

14 upper dielectric layer 16 protective film

18: lower substrate 20X: data electrode

22: lower dielectric layer 24: partition wall

26: phosphor 30, 130: PDP

32, 132: scan driver 34, 134: sustain drive

36, 136: data driver 38, 138: controller

40, 140: power supply unit 50, 150: second connectors

52, 152: buffer ICs 54, 154: first connector

56, 156: data driver 60, 160: energy recovery circuit

70, 170: data board 168: data driver module

172: data ports

In order to achieve the above object, a driving apparatus of a plasma display panel according to an embodiment of the present invention is a display in which pixel cells formed at intersections of first and second sustain electrodes and data electrodes for generating a discharge are arranged in a matrix form. A panel, a data driver module for driving the data electrode, and a data board connected to the data electrode and detachably connected to the data driver module are provided.

In the plasma display panel driving apparatus, the data driver module includes a data driver for driving the data electrode, and an energy recovery circuit connected to the data driver to reduce power consumption when driving the data electrode.

In the driving apparatus of the plasma display panel, the outer case of the data driver module may be manufactured in a heat sink form.

In the driving apparatus of the plasma display panel, the data board may include a plurality of ports to which the data driver module is detachably connected, a plurality of buffers for buffering signals from the ports, and a signal from the buffers. A plurality of first connectors for outputting to the data electrode, and a second connector for receiving a control signal from the control unit for controlling the data driver module and transmits the control signal to the ports.

In the driving apparatus of the plasma display panel, a plurality of data driver modules are connected to the ports in parallel according to the rated capacity of the plasma display panel.

In the driving apparatus of the plasma display panel, the data driver module receives a control signal from the controller through the ports and supplies the data to the ports.

Other objects and features of the present invention in addition to the above object will be apparent from the description of the embodiments with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described with reference to FIGS. 4 to 6.

4 and 5, a plasma display panel (hereinafter referred to as "PDP") according to an exemplary embodiment of the present invention has m × n discharge cells (not shown) in the scan electrode lines Y1 to Ym. ), The PDP 130 arranged in a matrix so as to be connected to the sustain electrode lines Z1 to Zm and the data electrode lines X1 to Xn, and the scan for driving the scan electrode lines Y1 to Ym. The driver 132, the sustain driver 134 for driving the sustain electrode lines Z1 to Zm, the data driver 136 for driving the data electrode lines X1 to Xn, and the scan driver 132. And a control unit 138 for supplying control signals for controlling the driving of the sustain driving unit 134 and the data driving unit 136, and a power supply unit 140 for supplying driving power for each driving unit.

The power supply unit 140 generates driving power for driving the scan driver 132, the sustain driver 134, the data driver 136, the controller 138, and the like using an external power source from the outside.

The controller 138 controls driving timing of each of the scan driver 132, the sustain driver 134, and the data driver 136.

The scan driver 132 sequentially supplies scan pulses and sustain pulses to the scan electrode lines Y1 to Ym using scan driver ICs (not shown), thereby sequentially discharging the discharge cells in line units. The discharge in each of the n discharge cells is continued.

The sustain driver 134 supplies sustain pulses to all of the sustain electrode lines Z1 to Zm using scan driver ICs (not shown).

The data driver 136 supplies the image data to the data electrode lines X1 to Xn in synchronization with the scan pulse. To this end, the data driver 136 may include a data driver module 168 including an energy recovery circuit for reducing power consumption of the data driver, a data board 170, and a data board 170 as shown in FIG. 5. The first connector 154 mounted on one side and supplied with a control signal from the control unit 138 and the external data driver module 168 mounted on one side of the data board 170 is connected to the first connector. A plurality of data ports 172 and a plurality of data ports mounted on one side of the data board 170 that receive a control signal from 154 and receive various signals from an external data driver module 168. A plurality of second connectors 150 for outputting various signals from the 172 to the data electrode lines X1 to Xn of the PDP 130, a plurality of data ports 172 and the second connectors ( 150) is connected between a large number of data It includes a plurality of the buffer IC (152) to buffer the various signals for relaying to the second connector 150 from the teudeul 172.

The first connector 154 is connected to the control unit 138 and is connected to the plurality of data ports 172 to supply control signals and image data supplied from the control unit 138 to the plurality of data ports 172. do.

Each of the plurality of data ports 172 includes an input terminal for receiving a control signal and video data from the first connector 154, an output port for outputting control signals and video data, etc., supplied to the input terminal to the outside. An input port for receiving various signals from an external data driver module 168 and an output terminal for outputting a signal input through the input port to the plurality of buffer ICs 152.

The plurality of data ports 172 output the control signal and the image data from the first connector 154 supplied through the input terminal to the data driver module 168 through the output port and also through the input port. The image data supplied from the data driver module 168 is output to the plurality of buffer ICs 152 through the output terminal.

The data driver module 168 includes an input terminal 164 and an output terminal 162 as well as an energy recovery circuit 160 for reducing power consumption of the data driver 156 and the data driver. The data driver module 168 uses the energy recovery circuit 160 to input image data supplied from the controller 138 supplied through the output ports of the plurality of data ports 172 through the input terminal 164. The received final image data is converted into final image data, and the converted final image data is output to the input ports of the plurality of data ports 172 through the output terminal 162 in response to a control signal from the controller 138.

The outer case of the data driver module 168 is manufactured as a heat sink to dissipate heat generated by the data driver 156 and the energy recovery circuit 160. Accordingly, the data driver module 168 is detachably connected to the plurality of data ports 172 of the data board 170.

Meanwhile, as illustrated in FIG. 6, the energy circuit circuit 160 integrated in the data driver module 168 may include an external capacitor Cs and an external capacitor Cs for charging the voltage recovered from the PDP 130. First and third switches S1 and S3 connected in parallel to each other), an inductor L connected between a node between the first and third switches S1 and S3 and the data driver 156, and an external sustain. A second switch S2 connected between the voltage source Vs and the inductor L and a fourth switch S4 connected between the base voltage source GND and the inductor L are provided.

The first switch S1 is turned on before the image data is supplied to form a current path between the external capacitor Cs and the data electrode line X of the PDP 130. The second switch S2 is turned on at the time when the data electrode line X is charged to the sustain voltage level in the turn-on period of the first switch S1 so as to convert the sustain voltage Vs to the data electrode line X. Will be supplied to The third switch S3 is turned on immediately after the address discharge occurs in the PDP 130 to form a discharge path between the data electrode line X and the external capacitor Cs. In the period where the third switch S3 is turned on, the external capacitor Cs charges the voltage recovered from the PDP 130. The fourth switch S4 is turned on after the charging of the external capacitor Cs is completed to maintain the voltage on the data electrode line X of the PDP 130 at the base potential.

The capacitance Cp of the inductor L and the PDP 130 constitute an LC series resonant circuit so that the resonance voltage is applied to the data electrode line X of the PDP 130 during the period in which the first switch S1 is turned on. Let this be charged.

The data driver 156 includes a fifth switch S5 connected to the output terminal of the energy recovery circuit 160 and a sixth switch S6 connected between the fifth switch S5 and the ground voltage source GND. . At this time, the data electrode line X is connected to the node point between the fifth switch S5 and the sixth switch S6. That is, the output terminal of the data driver module 168 is connected to the node point between the fifth switch S5 and the sixth switch S6.

The fifth switch S5 is turned on in the period in which the image data is input under the control of a controller (not shown) to supply the voltage from the energy recovery circuit 160 to the data electrode line X of the PDP 130. It will play a role. In addition, the fifth switch S5 is turned off in the absence of data to switch the voltage path between the energy recovery circuit 160 and the PDP 130. The sixth switch S6 is turned on in the absence of data under the control of a controller (not shown) so that the voltage on the data electrode line X maintains the base voltage, while the sixth switch S6 is turned on in the period in which data is input. Is off.

Each of the plurality of buffer ICs 152 buffers the final image data supplied from the data driver 56 through the plurality of data ports 172 and supplies them to the second connectors 150.

Each of the second connectors 150 is connected to a plurality of buffer ICs 152 and is connected to a data chip on film (not shown) connected to the data electrode lines X1 to Xn. The final image data supplied from the buffer ICs 152 is supplied to the data chip on film.

Accordingly, the final image data generated by the data driver 156 of the external data driver module 168 may include a plurality of data ports 172, a plurality of buffer ICs 152, second connectors 150, and data. The data is supplied to the data electrode lines X1 to Xn through the chip-on film.

In the PDP driving apparatus according to an embodiment of the present invention, the data driver 136 may include a data driver 156 on the data board 170 for supplying image data to the data electrode lines X of the PDP 130. Separate. Accordingly, the driving apparatus of the PDP according to the embodiment of the present invention connects the data driver module 168 in which the data board 170 and the data driver 156 are integrated through a port, and controls the controller through the data board 170. After supplying a control signal to the data driver module 168 to drive the data driver 156 from 138, image data generated by the data driver 156 through the data ports 172 to the data board 170 After supplying the data to the data electrode line X of the PDP 130, the image data supplied to the data board 170 is supplied through the data chip on film.

Meanwhile, since the rated capacity of the data driver varies according to the size of the PDP 130, the plurality of data driver modules 172 are connected in parallel to the plurality of data ports 172 according to the rated capacity. In addition, when a defect occurs in the data driver 156 of the data driver 136, only the data driver module 168 may be replaced, thereby reducing costs.

As described above, the driving device of the PDP according to the embodiment of the present invention can reduce the size of the data board and can also use the data board in common, thereby reducing the production cost, and manufacturing the data driver module in the form of a heat sink. The heat dissipation problem can be solved. In addition, the present invention can reduce the size of the PDP by reducing the size of the data board.

As described above, the driving apparatus of the plasma display panel according to the embodiment of the present invention manufactures a heat sink by separating a data driver on a data board for supplying image data to the data electrodes. Accordingly, the present invention can reduce the size of the data board. In addition, the present invention can reduce the production cost because the data board can be used in common regardless of the size of the PDP.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (6)

A display panel in which pixel cells formed at intersections of the first and second sustain electrodes and the data electrode for generating a discharge are arranged in a matrix; A data driver module for driving the data electrode; And a data board connected to the data electrode and detachably connected to the data driver module. The method of claim 1, The data driver module, A data driver for driving the data electrode; And an energy recovery circuit connected to the data driver to reduce power consumption when driving the data electrodes. The method of claim 2, The outer case of the data driver module is a drive device of the plasma display panel, characterized in that the heat sink is manufactured. The method of claim 1, The data board, A plurality of ports to which the data driver module is detachably connected; A plurality of buffers buffering signals from the port, A plurality of first connectors for outputting signals from the buffers to the data electrodes; And a second connector configured to receive a control signal from a controller for controlling the data driver module and transmit the control signal to the ports. The method of claim 4, wherein And the data driver modules are connected to the ports in parallel according to the rated capacity of the plasma display panel. The method of claim 4, wherein The data driver module receives a control signal from the controller through the ports and supplies the data to the ports.