KR20080023920A - Plasma display device - Google Patents

Abstract

A plasma display device is provided to decrease the use of a connector and harness by combining a part of a sustain electrode driving board with a part of a scan electrode driving board. A PDP(Plasma Display Panel)(11) is mounted on a chassis base(17). A scan electrode driving board(15c) is connected to scan electrodes. A first socket having power connection pins is arranged on one side of the scan electrode driving board. A sustain electrode driving board(15d) is connected to sustain electrodes. A second socket having power connection pins is arranged on one side of the sustain electrode driving board. A third socket having the connection pins corresponding to the first and second sockets is arranged on a power board(15e). Signal cables(70,80) couple the power board with the scan or sustain driving board and apply driving voltages on the driving boards. The signal cable includes first to third connectors. The first connector is connected to the first socket, while the second connector is connected to the second socket. The third connector is connected to the first to third connectors.

Description

Plasma display device {PLASMA DISPLAY DEVICE}

1 is a perspective view of a plasma display device according to an embodiment of the present invention.

2 is a diagram illustrating an electrical connection relationship between a scan electrode driving board, a sustain electrode driving board, and a power board according to an exemplary embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

11; Plasma display panel 15; Circuit board assembly

15c; Scan electrode driving board 15d; Sustain electrode drive board

15e; Power board 40; First socket

50; Second socket 60; Third socket

The present invention relates to a plasma display device, and more particularly, to a plasma display device having improved electrical connection between circuit board assemblies.

Typically, the plasma display panel is red (R), green (G) and blue (B) generated by exciting the phosphor by using a vacuum ultraviolet (VUV) emitted from the plasma generated through the gas discharge Realize the image with visible light.

The plasma display panel is classified into a direct current type and an alternating current type according to the shape of the driving voltage waveform applied and the structure of the discharge cell. In an AC plasma display panel, for example, address electrodes are formed on a rear substrate, and the address electrodes are covered with a dielectric layer. The partition walls are disposed between the address electrodes on the dielectric layer to form a stripe shape, and phosphor layers of red (R), green (G), and blue (B) layers are formed on the partition walls. On the front substrate facing the rear substrate, display electrodes including a pair of sustain electrodes and a scan electrode are formed along a direction crossing the address electrodes, and a dielectric layer and a protective film (MgO protective film) cover the display electrodes. A discharge cell is formed at the point where the address electrodes on the rear substrate and the pair of display electrodes on the front substrate cross each other. Millions of unit discharge cells are arranged in a matrix form in the plasma display panel.

The memory characteristic is used to drive the discharge cells of the plasma display panel. In more detail, in order to cause a discharge between the sustain electrode and the scan electrode constituting the pair of display electrodes, a potential difference of a specific voltage or more is required. Here, the voltage which becomes the boundary of discharge is called discharge starting voltage (Vf: Firing Voltage). When the scan voltage and the address voltage are applied to the scan electrode and the address electrode, the discharge is started to form a plasma in the discharge cell, and the electrons and ions of the plasma move toward the electrode having opposite polarities.

On the other hand, a dielectric layer is applied to each electrode of the plasma display panel, so that most of the transferred space charges are stacked on the dielectric layer having the opposite polarity, so that the net space potential between the scan electrode and the address electrode is originally applied to the address voltage. It becomes lower than (Va), the discharge is weakened and the address discharge is extinguished. At this time, a relatively small amount of electrons are accumulated in the sustain electrode and a relatively large amount of ions are accumulated in the scan electrode. The charges accumulated on the sustain electrode and the dielectric layer covering the scan electrode are called wall charges (Qw). The space voltage formed between the sustain electrode and the scan electrode by these wall charges is called a wall voltage (Vw).

Subsequently, when the discharge sustain voltage Vs is applied to the sustain electrode and the scan electrode, the sum of the magnitudes of the discharge sustain voltage Vs and the wall voltage Vw (Vs + Vw) is the discharge start voltage Vf. If higher, sustain discharge occurs in the discharge cell. The vacuum ultraviolet (VUV) generated at this time excites the phosphor to emit visible light through the transparent front substrate.

However, when there is no address discharge between the scan electrode and the address electrode (that is, when no address voltage Va is applied), wall charges do not accumulate between the sustain electrode and the scan electrode, and consequently, the sustain electrode and the scan electrode. There is no wall voltage in between. At this time, only the discharge sustain voltage Vs applied to the sustain electrode and the scan electrode is formed in the discharge cell, and since the discharge sustain voltage is lower than the discharge start voltage Vf, the gas space between the sustain electrode and the scan electrode cannot be discharged.

The plasma display panel driven as described above includes a plurality of printed circuit board assemblies (PBAs) connected to a sustain electrode, a scan electrode, and an address electrode through a flexible printed circuit (FPC) and a connector. .

In the above-described circuit board assembly configuration, the sustain electrode driving board, the scanning board assembly, and the imaging board are mounted close to each other in order to connect the signals of the electrodes from the plasma display panel as close as possible. In addition, the sustain electrode driving board and the scan electrode driving board are respectively connected to the power board by a connector to receive power for driving.

As such, the circuit configuration in which the driving voltage is supplied through the power board is formed by the sustain electrode driving board, the power board, the scan electrode driving board, and the power board having respective connectors and connected to the connection pins. A connector connected to the driving board and the scan electrode driving board is formed separately.

As described above, according to the related art, a power supply board has a problem of complicating a driving circuit by separately forming a driving voltage supply connector respectively connected to the sustain electrode driving board and the scan electrode driving board.

In addition, the hardware design of the power board, there is a problem that the design changes to the layout (Layout) according to the connector connection between the sustain electrode driving board and the scan electrode driving board or the price problem according to the size of the power board is limited.

SUMMARY OF THE INVENTION An object of the present invention is to provide a plasma display device that can improve the electrical connection relationship between circuit board assemblies to solve the limitation of design change depending on the layout or power board size according to the connector connection in the hardware design of the power board. have.

In order to achieve the above object, the present invention is connected to a plasma display panel, a chassis base to which the plasma display panel is attached and supported, scan electrodes drawn from the plasma display panel, and connection pins for supplying power to one side are provided. A sustain electrode driving board having a first socket installed therein, a sustain electrode connected to sustain electrodes drawn from the plasma display panel, and a second socket having connection pins for supplying power to one side thereof; Voltage required for driving by connecting a power supply board with a third socket provided with integrated connection pins corresponding to the connection pins of the second socket, and between the power supply board and the scan electrode driving board and between the power supply board and the sustain electrode driving board. The signal cable is applied, the signal cable is connected to the first socket of the scanning electrode drive board Includes a first connector, a second connector connected to the second socket of the sustain electrode driving board, and a third connector connected to the first connector and the second connector, respectively, and connected to the third socket of the power board. It is done.

In the above configuration, the connection pin block of the integrated sustain discharge voltage pattern provided in the third socket may be shared by the third connector of the signal cable connected to the scan electrode driving board and the sustain electrode driving board.

The third socket may have a two-row structure in which the connecting pins are arranged. Connection pins corresponding to the first socket may be formed in one row, and connection pins corresponding to the second socket may be formed in two rows.

The signal cable may be made of a flexible cable and the arrangement of unit signal lines may be formed in a single column structure.

In the above configuration, the flexible cable may be made of a flexible flat cable (FFC), and may be made of a flexible printed cable (FPC).

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. While many specific details, such as the following description and the annexed drawings, are shown to provide a more general understanding of the invention, these specific details are illustrated for the purpose of explanation of the invention and are not meant to limit the invention thereto. And a detailed description of known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

FIG. 1 is a perspective view of a plasma display device according to an exemplary embodiment of the present invention, and illustrates a layout of a chassis base and a plasma display panel on which a circuit board assembly is mounted.

Referring to FIG. 1, a plasma display apparatus according to an exemplary embodiment of the present invention includes a plasma display panel 11, a thermal conductive sheet 13, a circuit board assembly 15; 15a to 15e (PBA; printed circuit board assembly), and a chassis. And base 17.

First, the plasma display panel 11 includes a front panel and a rear panel which are integrally bonded by a sealing material. The plasma display panel 11 includes discharge cells therein to display visible light through plasma generation. Implement arbitrary color images. The plasma display panel 11 is configured to display an image by using gas discharge, and the present invention relates to the coupling relationship between the plasma display panel 11 and other components. Detailed description thereof will be omitted.

The circuit board assembly 15 is electrically connected to the plasma display panel 11 to drive the plasma display panel 11, the image board 15a, the address buffer board 15b, and the scan electrode driving board 15c. And a sustain electrode driving board 15d and a power board 15e. The image board 15a generates a control signal for driving the address electrode, a control signal for driving the sustain electrode and the scan electrode, and generates the address buffer board 15b, the sustain electrode driving board 15d, and the scan electrode driving board 15c, respectively. To feed. The address buffer board 15b controls the address electrode, and the scan electrode driving board 15c controls the scan electrode. In addition, the sustain electrode driving board 15d controls the sustain electrode, and the power board 15e supplies power required for driving the above-described circuit board assemblies.

The chassis base 17 attaches and supports the plasma display panel 11 to the front thereof with double-sided tape, and supports the circuit board assemblies 15 to the rear thereof.

1 and 2 illustrate a coupling relationship between the scan electrode driving board 15c, the sustain electrode driving board 15d, and the power supply board 15e among the circuit board assemblies 15. Explain.

2 is a diagram illustrating an electrical connection relationship between a scan electrode driving board, a sustain electrode driving board, and a power board according to an exemplary embodiment of the present invention.

Referring to FIG. 2, the scan electrode driving board 15c is mounted to the chassis base 17 with a set screw and generates a control signal for driving the scan electrode. In addition, the scan electrode driving board 15c has a first socket 40 having connection pins electrically connected to each other for power supply.

The sustain electrode driving board 15d is mounted to the chassis base 17 with a set screw, and generates a control signal for driving the sustain electrode. In addition, the sustain electrode driving board 15d includes a second socket 50 to which connection pins for power supply are electrically connected to one side.

As shown in FIG. 2, the power board 15e includes a third socket 60 in which connection pins corresponding to the first socket 40 and the second socket 50 are electrically connected to each other. 40 and the electric power required for driving the scan electrode driving board 15c and the sustain electrode driving board 15d according to the electrical circuit connection between the second socket 50 and the third socket 60.

As shown in FIG. 2, the third socket 60 has connection pins formed in two rows, and connection pins corresponding to the first socket 40 are formed in one row and correspond to the second socket 50. Connection pins are formed in two rows. Here, it is not necessary to limit the arrangement of the connection pins of the third socket 60. For example, connection pins corresponding to the first socket 40 may be formed in two rows, and connection pins corresponding to the second socket 50 may be formed in one row.

As described above, as the connecting pins of the third socket 60 are formed in two rows, two connectors may be electrically connected to one socket, and one connector may be electrically connected as in the embodiment of the present invention. . Therefore, it is not necessary to separately form two sockets on the power board 15e as in the related art, and the socket unnecessary portion can be used for other purposes. In addition, by removing the unnecessary portion of the socket can improve the weight and shape of the power board (15e).

Electrical circuit connections of the first socket 40, the second socket 50, and the third socket 60 are made of signal cables 70, 80. Reference numeral 70 is a signal cable for electrical circuit connection of the first socket 40 and the third socket 60, and reference numeral 80 is an electrical circuit connection of the second socket 50 and the third socket 60. It is a signal cable for.

The signal cables 70 and 80 may include a first connector connected to the first socket 40 of the scan electrode driving board 15c, a second connector connected to the second socket 50 of the sustain electrode driving board 15d, And a third connector connected to the first connector and the second connector, respectively, and connected to the third socket 60 of the power board 15e.

The signal cables 70 and 80 may be made of a flexible cable, may be made of a flexible flat cable (FFC), or may be made of a flexible printed cable (FPC). . In addition, the signal cables 70 and 80 preferably have an array of unit signal lines arranged in a single column structure so as to correspond to the connection pin arrangement structures of the first socket 40 and the second socket 50.

In the above-described configuration, in order to display the screen through the plasma display panel, driving of the sustain electrode driving board 15d, the scan electrode driving board 15c, and the address buffer board 15b through the power board 15e is performed. It shall be possible to generate the corresponding discharge by applying the required voltage.

For reference, voltages applied to the sustain electrode driving board 15d through the power board 15e are Vs and Ve (or Ver), and voltages applied to the scan electrode driving board 15c are Vs, Vset, and Vscan. .

Here, Vs represents a sustain discharge voltage as a voltage applied to the scan electrode in the sustain period. Ver represents an erase voltage, and Vset represents a voltage for initializing the states of all discharge cells in the reset period. Vscan represents the scan voltage.

Meanwhile, when a voltage is applied to the sustain electrode driving board 15d and the scan electrode driving board 15c through the power board 15e, the common part may be shared. That is, when the plasma display panel is driven, the sustain discharge voltage (Vs) connection pins among the connection pins so as to share the voltage of the power supply board 15e supplied to the sustain electrode driving board 15d and the scan electrode driving board 15c. Connecting pins can be arranged by connecting the common parts as one.

In the case of the sustain discharge voltage Vs, the sustain discharge voltage Vs is also supplied to the sustain electrode driving board 15d and the scan electrode driving board 15c. Therefore, the sustain discharge voltage Vs is connected to the sustain discharge voltage Vs when the connecting pins of the third socket 60 are arranged. The pins 62 may be arranged to be shared. Accordingly, the sustain discharge voltage (Vs) connecting pin 62 of the integrated sustain discharge voltage pattern provided in the third socket 60 is connected to the sustain electrode driving board 15d and the scan electrode driving board 15c. It can be shared by the third connector of.

As described above, the plasma display apparatus according to the present invention improves the configuration corresponding to the driving voltage supply in the electrical connection relationship between the power board, the sustain electrode driving board, and the scan electrode driving board, and drives the sustain electrode in hardware design of the power board. There is an effect that the limitation of the design change can be solved for the layout (Layout) according to the connector connection between the board and the scan electrode driving board or the price problem due to the size of the power board.

In addition, by arranging the connection pins by tying one common part among the voltages of the power supply board supplied to the sustain electrode driving board and the scan electrode driving board to secure the free space of the power board, and reducing the cost by reducing the connector and harness It can work.

Claims (8)

A plasma display panel; A chassis base to which the plasma display panel is attached and supported; A scan electrode driving board connected to the scan electrodes drawn from the plasma display panel and having a first socket having connection pins for supplying power to one side thereof; A sustain electrode driving board connected to the sustain electrodes drawn from the plasma display panel and having a second socket having connection pins for supplying power to one side thereof; A power board on which a third socket provided by integrating connection pins corresponding to the connection pins of the first socket and the second socket is installed; And And a signal cable connecting the power board and the scan electrode driving board and the power board and the sustain electrode driving board to apply a voltage required for driving. The signal cable, A first connector connected to the first socket of the scan electrode driving board; A second connector connected to the second socket of the sustain electrode driving board; And And a third connector connected to the first connector and the second connector, respectively, and connected to a third socket of the power board. The method of claim 1, And a connecting pin block of an integrated sustain discharge voltage pattern provided in the third socket is shared by a third connector of a signal cable connected to the scan electrode driving board and the sustain electrode driving board. The method of claim 1, And the third socket has a connection pin arrangement in a two-row structure. The method of claim 1, And wherein the third socket includes connection pins corresponding to the first socket in one row and connection pins corresponding to the second socket in two rows. The method of claim 1, And the signal cable is a flexible cable. The method of claim 1, And the signal cable has an array of unit signal lines arranged in a single column structure. The method of claim 5, The flexible cable is a plasma display device consisting of a flexible flat cable (FFC). The method of claim 5, The flexible cable is a plasma display device comprising a flexible printed cable (FPC).

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