KR100743056B1 - Driving apparatus of plasma display panel comprising multiple stage data driving module - Google Patents

Abstract

The present invention distributes the voltage applied to the data driver IC, thereby reducing the breakdown voltage required for the data driver IC, lowering the cost of the driver IC, thereby securing the price competitiveness of the plasma display, and reducing the heat generation of the data driver IC. This is to improve reliability and reduce power consumption.

The driving apparatus of the plasma display panel of the present invention includes two or more data driving ICs having an output terminal, a signal input terminal, an upper voltage input terminal, and a lower voltage input terminal, wherein the two or more data driving ICs include an output terminal of the front end data driving IC. When the data electrode driving signal is input to the signal input terminal, the voltage applied to the upper voltage input terminal of the front data driver IC and the upper voltage input terminal of the rear data driver IC are connected to the lower power input terminal of the rear data driver IC. The voltage summed up is output to the output terminal of the rear data driver IC.

Plasma Display Panels, Data Drive Circuits, Data Drive ICs

Description

Driving apparatus and driving method of plasma display panel with multi-stage data driving module {DRIVING APPARATUS OF PLASMA DISPLAY PANEL COMPRISING MULTIPLE STAGE DATA DRIVING MODULE}

1 is an exploded perspective view showing the structure of a conventional three-electrode AC surface discharge type plasma display panel.

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

FIG. 3 is a waveform diagram illustrating a driving method during one subfield constituting one TV field.

4 is a schematic diagram showing the configuration of the data driver IC 30 provided in the data driver circuit section 24 of the prior art.

FIG. 5 is a diagram schematically showing the configuration of the data driving circuit unit 124 in the configuration of the plasma display driving apparatus according to the first embodiment of the present invention.

FIG. 6 is a diagram schematically showing the configuration of the data driving circuit unit 224 in the configuration of the plasma display driving apparatus according to the second embodiment of the present invention.

The present invention relates to a driving apparatus and a driving method of a plasma display panel, and in particular, to improve the reliability and power consumption problems of the data driving apparatus.

A plasma display panel (hereinafter, also referred to as a 'PDP') is a display device using a phenomenon in which visible light is generated when ultraviolet rays generated by gas discharge excite phosphors.

1 is an exploded perspective view showing the structure of a conventional three-electrode AC surface discharge type plasma display panel. Referring to FIG. 1, each discharge cell has a scan / sustain electrode 2Y formed on the upper substrate 1, a common sustain electrode 2Z, and an address electrode 2A formed on the lower substrate 9. do. The scan / sustain electrode 2Y and the common sustain electrode 2Z are usually made of a transparent conductive film such as indium-tin-oxide (hereinafter referred to as “ITO”). In order to reduce the voltage drop caused by these, bus electrodes 3 made of a metal such as chromium (Cr) are usually formed on each of them.

The upper dielectric layer 4 and the protective film 5 are stacked on the upper substrate 1 on which the scan / sustain electrode 2Y and the common sustain electrode 2Z are formed side by side. The protective film 5 is usually made of a material such as magnesium oxide (MgO) in order to prevent damage to the upper dielectric layer 4 due to sputtering generated during plasma discharge and to improve emission efficiency of secondary electrons.

The lower dielectric layer 8 and the partition wall 6 are formed on the lower substrate 9 on which the address electrode 2A is formed, and phosphors 7 are coated on the lower dielectric layer 8 and the partition wall 6 and they are applied during plasma discharge. It is excited by the generated ultraviolet rays to generate visible light of any one of red (R), green (G), and blue (B). In the discharge space provided by the upper substrate 1, the lower substrate 9, and the partition wall 6, Ne + Xe, a penning gas, and the like for gas discharge are sealed.

The discharge cell of the above-described structure is selected by the counter discharge between the address electrode 2A and the scan / sustain electrode 2Y, and then maintains the discharge by the surface discharge between the scan / sustain electrode 2Y and the common sustain electrode 2Z. . In such a discharge cell, the fluorescent material 7 emits light by ultraviolet rays generated at the time of sustain discharge, so that visible light is emitted outside the cell. As a result, the discharge cells adjust the period during which the discharge is maintained to implement gray scale, and the PDP in which the discharge cells are arranged in a matrix form displays an image.

FIG. 2 is a plan view showing an arrangement of electrode lines and discharge cells of the PDP shown in FIG. 1. Referring to FIG. 2, in the driving apparatus of the conventional three-electrode AC surface discharge type PDP, m × n discharge cells 20 are formed of scan electrode lines Y1 to Ym, sustain electrode lines Z1 to Zm, and address electrodes. The PDP panel 21 arranged in a matrix form to be connected to the lines X1 to Xn, the scan driving circuit unit 22 for driving the scan electrode lines Y1 to Ym, and the sustain electrode lines Z1 to The sustain driving circuit section 23 for driving Zm, the data driving circuit section 24 for driving the address electrode lines X1 to Xn, display data D from the outside, and a horizontal synchronizing signal H; And a control circuit section 25 for supplying a control signal to each driving circuit based on the vertical synchronizing signal V, a clock signal, and the like.

FIG. 3 is a waveform diagram illustrating a driving method during one subfield constituting one TV field. In general, one subfield includes an initialization period R for making the wall charge states of the discharge cells on the panel the same, and selectively between the scan electrode Y and the address electrode X in each discharge cell. An address period W for generating the discharge to write image data and a discharge sustain period S for generating a sustain discharge according to the written image data can be generated.

4 is a schematic diagram showing the configuration of the data driver IC 30 provided in the data driver circuit section 24 of the prior art. The illustrated prior art data driving circuit section 24 includes a data driving integrated circuit IC having at least a data driving signal input terminal S, an upper voltage input terminal U, a lower voltage input terminal D, and an output terminal O ( 30). The output terminal O of the data driving IC 30 is connected to each address electrode of the PDP panel, and there is a capacitive load C _AY between the address electrode and the scan electrode.

The data driving signal 38 is data of a corresponding discharge cell for a corresponding subfield generated by performing a process such as inverse gamma correction and an error diffusion process on the input image signals R, G, and B. The data driving IC 30 supplies the address voltage Va to the corresponding address electrode through the output terminal O according to the data driving signal 38 applied to the signal input terminal S, and is determined by sequential selection of the scan electrodes. Data is written into the corresponding discharge cell. In addition, when the data to be written in the discharge cell is low, the ground voltage GND is output. According to the data driving signal 38, the switching of the first switch 32 and the second switch 34 in the data driving IC 30 is performed so that the voltages of the upper voltage input terminal U and the lower voltage input terminal D are reduced. It is optionally delivered to the output stage (O).

In general, since the address voltage Va is a rather high voltage (for example, about 50 to 70 V), since the voltage is applied to the data driver IC as it is, the data IC should be made of a device having a sufficient breakdown voltage. Problems such as the reliability of the driving IC are occurring. In addition, a data driving IC using a high breakdown voltage device has become a factor in weakening the price competitiveness of the PDP.

The present invention distributes the voltage applied to the data driver IC, and reduces the breakdown voltage required for the data driver IC to lower the unit cost of the driver IC to drive the plasma display panel driving device and drive to ensure the price competitiveness It is to provide a method.

In addition, the present invention is to provide a driving apparatus and a driving method of the plasma display panel to solve the heat generation of the data driving IC to improve the reliability and reduce the power consumption.

In order to achieve the above object, the plasma display driving apparatus according to the first aspect of the present invention provides a supply voltage of a first input terminal to an output terminal in response to a rise of a data voltage driving signal, and according to a drop of the data voltage driving signal. A first data driving module configured to provide a supply voltage of a second input terminal to the first output terminal; And a second data driving module configured to provide a supply voltage of a third input terminal to an output terminal according to the rising of the data voltage driving signal, and provide a supply voltage of a fourth input terminal to the second output terminal according to the falling of the data voltage signal. The first output terminal is connected to the fourth input terminal, a first voltage is applied between the first input terminal and the second input terminal, and a second voltage is applied between the third input terminal and the fourth input terminal. It is characterized by.

In addition, the data electrode driving apparatus of the plasma display panel according to the second aspect of the present invention, a second output terminal, a second signal input terminal, a second upper voltage input terminal and a second lower voltage input terminal connected to the data electrode; Data drive ICs; And a first data driver IC having a first output terminal connected to a second lower voltage input terminal of the second data driver IC, a first signal input terminal, a first upper voltage input terminal, and a first lower voltage input terminal. And when a data electrode driving signal is input to the second signal input terminal, voltages applied to the first upper voltage input terminal and the second upper voltage input terminal overlap each other, and are output to the second output terminal.

In addition, the driving apparatus of the plasma display panel according to the third aspect of the present invention includes two or more data driving ICs having an output terminal, a signal input terminal, an upper voltage input terminal, and a lower voltage input terminal. When the output terminal of the front data driver IC is connected to the lower voltage input terminal of the rear data driver IC and the data electrode driving signal is input to the signal input terminal, the voltage applied to the upper voltage input terminal of the front data driver IC and the rear data driver The sum of the voltages input to the upper voltage input terminal of the IC is output to the output terminal of the rear data driver IC.

In addition, the driving method of the plasma display according to the fourth aspect of the present invention includes an output terminal, a signal input terminal, an upper voltage input terminal, and a lower voltage input terminal, respectively, and an output terminal of the front data driver IC is connected to the lower voltage input terminal of the rear data driver IC. A method of driving a plasma display panel including two or more data driving ICs, the method comprising: applying a first data driving signal to the signal input terminal of the two or more data driving ICs; And providing a voltage obtained by adding the voltage applied to the upper voltage input terminal of the front data driver IC and the voltage input to the upper voltage input terminal of the rear data driver IC to the output terminal of the rear data driver IC.

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

FIG. 5 is a diagram schematically showing the configuration of the data driving circuit unit 124 in the configuration of the plasma display driving apparatus according to the first embodiment of the present invention.

The illustrated data driver circuit portion 124 has a two-stage configuration of the first data driver IC 40 and the second data driver IC 50. The first data driving IC 40 includes a first signal input terminal S1, a first upper voltage input terminal U1, a first lower voltage input terminal D1, and a first output terminal O1. By the data drive signal 38 inputted to S1, the 1st switching element 42 and the 2nd switching element 44 which were provided inside are controlled.

When the input data is the first data driving signal (for example, high), the first data driving IC 40 may turn on the first switching element 42 and turn off the second switching element 44. When the first voltage (ie, Va1) input to the upper voltage input terminal U1 is provided to the first output terminal O1, and the input data is the second data driving signal (eg, low), the first switching The element 42 is turned off and the second switching element 44 is turned on to provide the voltage (ie, GND) input to the first lower voltage input terminal D1 to the first output terminal O1.

Similarly, the second data driver IC 50 includes a second signal input terminal S2, a second upper voltage input terminal U2, a second lower voltage input terminal D2, and a second output terminal O2, and a second signal. The first switching element 52 and the second switching element 54 provided therein are controlled by the data driving signal 38 input to the input terminal S2 and common to the first data driving IC 40.

In addition, the output terminal O1 of the first data driving IC 40 is connected to the second lower input terminal D2 of the second data driving IC 50, and the second upper voltage input terminal U2 and the second lower voltage input terminal are connected to each other. The second voltage Va2 is applied between the lines D2.

The second data driver IC 50 receives a data drive signal 38 in common with the first data driver IC 40, and when the input data is the first data driver signal (eg, high), the first data driver IC When the switching element 52 is turned on and the second switching element 54 is turned off to be input to the second upper voltage input terminal U2, that is, the second voltage (ie, Va2) is connected to the first data driving IC 40. The voltage output from the first output terminal O1 and loaded on the first voltage Va1 supplied to the second lower voltage input terminal D2 of the second data driver IC 50 to add the two voltages is the second output terminal O2. Is supplied.

In addition, when the input data is the second data driving signal (eg, low), the first switching element 52 is turned off and the second switching element 54 is turned on so that the first data driving IC 40 is turned on. The ground voltage GND provided from the first output terminal O1 of the second data driver IC 50 and supplied to the second lower input terminal D2 of the second data driver IC 50 is the second output terminal O2 of the second data driver IC 50. Will also appear.

Through this process, according to the data driving signal 38, the voltage in which the first voltage Va1 and the second voltage Va2 output from the second data driving IC 50, which is the final stage, to the PDP panel are overlapped with each other is obtained. It becomes substantially the same level as the address voltage Va of the above-mentioned prior art (FIG. 4). Therefore, the data driving circuit unit 124 can perform the conventional data driving operation as it is, and only the first voltage Va1 and the second voltage Va2 are applied to each of the data driving ICs 40 and 50. Therefore, the breakdown voltage condition required for the data driver IC is extremely reduced.

In addition, the switching voltage width of each data driver IC is theoretically about 1/2 of the conventional case, which enables reduction of power consumption. In general, the driving circuit of the plasma display panel, it is made up of a plurality of switching elements, and the dynamic power consumption by switching the up a large proportion in the total power consumption, wherein the dynamic power consumption due to switching PlossαCp · V ² · fs Can be expressed as: Here, Ploss denotes dynamic power consumption, Cp denotes a capacitance of a load, V denotes a voltage change width (ie, a width of a switching voltage level) during switching, and fs denotes a switching frequency.

That is, when the width of the switching voltage level is reduced by 1/2, the power consumption becomes 1/4, and the circuit proposed in FIG. 5 uses two data driving ICs 40 and 50, but consumes each of them. Since the sum of the powers is doubled, the total power consumption may eventually be 1/2 even in the case of the prior art of FIG. 4.

In the above-described first embodiment, only the case in which the data driving ICs 40 and 50 are configured in two stages is illustrated. However, the circuit modules in which a single device is connected to each other of the data driving ICs 40 and 50 are not integrated circuits. It is also possible to replace the function.

FIG. 6 is a diagram schematically showing the configuration of the data driving circuit unit 224 in the configuration of the plasma display driving apparatus according to the second embodiment of the present invention.

The illustrated data driver circuit portion 224 has a three-stage configuration of the first data driver IC 60, the second data driver IC 70, and the third data driver IC 80. The first data driver IC 60 includes a first signal input terminal S1, a first upper voltage input terminal U1, a first lower voltage input terminal D1, and a first output terminal O1. By the data drive signal 38 input to S1, the 1st switching element 62 and the 2nd switching element 64 which were provided inside are controlled.

The second data driver IC 70 includes a second signal input terminal S2, a second upper voltage input terminal U2, a second lower voltage input terminal D2, and a second output terminal O2, and a second signal input terminal S2. The first switching element 72 and the second switching element 74 provided therein are controlled by the data driving signal 38 inputted to S2.

The second data driver IC 70 includes a second signal input terminal S2, a second upper voltage input terminal U2, a second lower voltage input terminal D2, and a second output terminal O2, and a second signal input terminal S2. The first switching element 72 and the second switching element 74 provided therein are controlled by the data driving signal 38 inputted to S2. The basic configuration of the third data driver IC 80 is the same as that of the second data driver IC 70, and includes a third signal input terminal S3, a third upper voltage input terminal U3, and a third lower voltage input terminal. (D3) and the third output terminal (O3).

Unlike the first embodiment described above, in the second embodiment shown in FIG. 6, the first data driver IC 60, the second data driver IC 70, and the third data driver IC 80 are divided into three stages. Have a connected configuration. That is, the first output terminal O1 of the first data driving IC 60 is connected to the second lower voltage input terminal D2 of the second data driving IC 70, and the second output terminal O1 of the second data driving IC 70 is connected. The output terminal O2 is connected to the third lower voltage input terminal D3 of the third data driving IC 80.

In addition, a first voltage Va1 is applied between the first upper voltage input terminal U1 and the first lower voltage input terminal D1 of the first data driver IC 60, and the second data driver IC 70 may be configured to have a first voltage Va1. Between the second upper voltage input terminal U2 and the second lower voltage input terminal D2, the second voltage Va2 is connected to the third upper voltage input terminal U3 and the third lower voltage input terminal of the third data driver IC 80. The third voltage Va3 is applied between the lines D3.

Thus, in the second embodiment, when the input data is the first data driving signal (eg, high), the first switching device 82 of the second data driving IC 80 is turned on and the second switching device 84 is turned on. ) Is turned off and the third voltage (ie, Va3) input to the third upper voltage input terminal U3 is provided from the second output terminal O2 of the second data driver IC 70 to drive the third data. The voltage summed up by the voltage supplied to the third lower voltage input terminal D3 of the IC 80 is supplied to the third output terminal O3.

In this case, the voltage output from the second data driver IC 70 also becomes a voltage in which the first voltage Va1 and the second voltage Va2 are overlapped through the same process. The final output terminal voltage of is the sum of the first voltage Va1, the second voltage Va2, and the third voltage Va3.

In addition, when the input data is the second data driving signal (eg, low), the first data driving IC 60 provides the base voltage GND to the first output terminal O1, which is the second data. The second lower voltage input terminal D2 of the driving IC 70 is transferred to the second output terminal O2, and the third data driving IC is connected to the third lower voltage input terminal D3 of the third data driving IC 80. Since it is provided to the third output terminal (O3) of 80, the final output voltage will eventually appear as the base voltage (GND).

Through this process, the data driving circuit unit 224 can perform the data driving operation of the prior art as it is, each data driving IC (60, 70, 80), respectively, the first voltage Va1, the second Since only the voltage Va2 and the third voltage Va3 are applied, the breakdown voltage condition required for the data driver IC is extremely reduced.

In addition, the switching voltage width of each data driving IC is theoretically about 1/3 compared to the conventional case, and the power consumption of each IC is 1/9. In the circuit proposed in FIG. Although the data driver ICs 60, 70, and 80 are used, the power consumed in each of them is tripled, so that the total power consumption may be theoretically 1/3 as compared with the conventional technique of FIG. It can be.

Hereinafter, as described above, each plasma includes an output terminal, a signal input terminal, an upper voltage input terminal, and a lower voltage input terminal, and includes two or more data driving ICs in which an output terminal of the front data driver IC is connected to a lower voltage input terminal of the rear data driver IC. An embodiment of a method of driving a display panel will be described.

In the driving method as an embodiment, first, a first data driving signal (eg, high) is applied to the signal input terminals of the two or more data driving ICs, and a voltage applied to an upper voltage input terminal of the front data driving IC. And providing a voltage obtained by adding the voltage input to the upper voltage input terminal of the rear data driver IC to an output terminal of the rear data driver IC, and providing a second data driving signal (eg, a second data drive signal to the signal input terminals of the two or more data driver ICs). For example, the method may include applying a low) and providing a voltage applied to a lower voltage input terminal of the front data driver IC to an output terminal of the rear data driver IC.

The plasma display panel driving apparatus and driving method according to the present invention can be modified and applied in various forms within the scope of the technical idea of the present invention. After all, the embodiments and drawings are merely for the purpose of describing the details of the invention, and are not intended to limit the scope of the technical idea of the invention, the scope of the present invention is not limited to the claims to be described later and It should be judged to include an even range.

According to the plasma display panel driving apparatus and driving method of the present invention, it is possible to secure the price competitiveness of the plasma display by distributing the voltage applied to the data driving IC and reducing the breakdown voltage required for the data driving IC to reduce the unit cost of the driving IC. Will be.

In addition, according to the plasma display panel driving apparatus and driving method of the present invention, it is possible to eliminate heat generation of the data driving IC to improve reliability and reduce power consumption.

Claims (8)

A first data driving module providing a supply voltage of a first input terminal to the first output terminal as the data voltage driving signal rises, and providing a supply voltage of a second input terminal to the first output terminal according to the falling of the data voltage driving signal; ; A second data driver providing a supply voltage of a third input terminal to a second output terminal in response to the rising of the data voltage driving signal, and providing a supply voltage of a fourth input terminal to the second output terminal according to the falling of the data voltage driving signal; module; And A third data driver providing a supply voltage of a fifth input terminal to a third output terminal in response to the rising of the data voltage driving signal and providing a supply voltage of a sixth input terminal to the third output terminal in response to the falling of the data voltage driving signal; module Including; The first output terminal is connected to the fourth input terminal, The second output terminal is connected to the sixth input terminal, A first voltage is applied between the first input terminal and the second input terminal. A second voltage is applied between the third input terminal and the fourth input terminal. A third voltage is applied between the fifth input terminal and the sixth input terminal. The sum of the first voltage, the second voltage, and the third voltage may be selectively output to the third output terminal according to the data voltage driving signal, or the voltages of the second input terminal, the fourth input terminal, and the sixth input terminal may be changed to the third output terminal. A drive device for a plasma display panel, which is output to an output terminal. The method of claim 1, And the first data driving module, the second data driving module and the third data driving module are integrated in a single IC form. The method of claim 1, The sum of the first voltage, the second voltage, and the third voltage is equal to the address voltage Va for driving the data electrode of the plasma display panel. In the data electrode driving device of the plasma display panel, A third data driving IC having a third output terminal connected to the data electrode, a third signal input terminal, a third upper voltage input terminal, and a third lower voltage input terminal; A second data driving IC having a second output terminal connected to a third lower voltage input terminal of the third data driving IC, a second signal input terminal, a second upper voltage input terminal, and a second lower voltage input terminal; And A first data driving IC having a first output terminal connected to a second lower voltage input terminal of the second data driving IC, a first signal input terminal, a first upper voltage input terminal, and a first lower voltage input terminal; Including, When a data electrode driving signal is input to the first, second and third signal input terminals, the voltages applied to the first upper voltage input terminal, the second upper voltage input terminal, and the third upper voltage input terminal are summed and output to the third output terminal. And a data electrode driving device of the plasma display panel. The method of claim 4, wherein When a second data electrode driving signal is input to the first, second and third signal input terminals, voltages applied to the first lower voltage input terminal, the second lower voltage input terminal, and the third lower voltage input terminal are transferred to the third output terminal. And a data electrode driving device of the plasma display panel. In the driving apparatus of the plasma display panel, Three or more data driving ICs having an output terminal, a signal input terminal, an upper voltage input terminal, and a lower voltage input terminal, The three or more data driver ICs, each output terminal of the front end data driver IC is connected to the lower voltage input terminal of the next data driver IC, When a data electrode driving signal is input to the signal input terminal, a voltage obtained by adding voltages applied to the upper voltage input terminals of the three or more data driving ICs is an output terminal of the last data driving IC among the three or more data driving ICs. And a plasma display panel drive device. In the method of driving a plasma display panel, each output stage has a signal input stage, an upper voltage input stage, and a lower voltage input stage, and the output stage of the front data driver IC includes three or more data driver ICs connected to the bottom voltage input stage of the next stage data driver IC. In Applying a first data driving signal to the signal input terminal of the three or more data driving ICs; And And providing the sum of the voltages applied to the upper voltage input terminals of the three or more data driver ICs to the output terminal of the data driver IC of the last stage of the three or more data driver ICs. How to drive the panel. The method of claim 7, wherein Applying a second data driving signal to the signal input terminal of the three or more data driving ICs; And And providing a voltage applied to a lower voltage input terminal of the three or more data driver ICs to an output terminal of a data driver IC of a last stage of the three or more data driver ICs. Way.

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