KR20060080812A - Plasma display apparatus - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display device, and more particularly, to a plasma display device capable of shielding electromagnetic interference generated when the plasma display device is driven by improving the plasma display device.

The present invention is a drive circuit board formed on the frame and the rear surface of the frame and the heat sink formed on the rear surface of the drive circuit board and a boss for fastening the heat sink and the drive circuit board is formed and the heat sink and the drive circuit board is grounded by grounding means. It is characterized by.

Plasma Display Panel, Frame, Drive Circuit Board, Heat Sink, Grounding Means

Description

Plasma Display Apparatus {Plasma Display Apparatus}

1 is a perspective view schematically showing the structure of a conventional plasma display device.

2 is a view showing the structure of a finished product of a conventional plasma display device.

3 is a view showing a driving apparatus of a conventional plasma display panel.

4 is a view showing a plasma display device with a conventional heater sink.

5 is a view illustrating a fastening structure between a heater sink, a driving circuit board, and a frame of a conventional plasma display device.

6 is a view illustrating a fastening structure between a heater sink, a driving circuit board, and a frame of the plasma display device according to the present invention;

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display device, and more particularly, to a plasma display device capable of shielding electromagnetic interference (hereinafter referred to as EMI) generated by driving a plasma display device by improving the plasma display device. It is about.

In general, a plasma display panel is a partition wall formed between a front substrate and a rear substrate to form a unit cell, and each cell includes neon (Ne), helium (He), or a mixture of neon and helium (Ne + He) and An inert gas containing the same main discharge gas and a small amount of xenon is filled. When discharged by a high frequency voltage, the inert gas generates vacuum ultraviolet rays and emits phosphors formed between the partition walls to realize an image. Such a plasma display panel has a spotlight as a next generation display device because of its thin and light configuration.

1 is a perspective view schematically illustrating a structure of a conventional plasma display device.

As shown in FIG. 1, the plasma display device includes a case 110 including a front cabinet 111 and a back cover 112 that determine an appearance, and a phosphor by vacuum ultraviolet rays caused by gas discharge inside the case. A plasma display panel 120 to excite an image, a driving device 130 including a PCB to drive and control the plasma display panel, and heat generated when the plasma display device is driven by being connected to the driving device. And a frame 140 for emitting and supporting the plasma display panel.

In addition, the filter 150 and the filter 150 formed by attaching a film to a transparent glass substrate (not shown) with a predetermined distance to the front surface of the plasma display panel are supported and electrically connected to the metal back cover. Finger spring gasket (Finger Spring Gasket) 160 and Filter Supporter (Filter Supporter, 170) for connecting, and a module supporter (Module Supporter, 180) for supporting the PDP including the drive device.

In the fabrication process of the conventional plasma display device having such a structure, first, a plasma display panel that implements the image is manufactured, and then a frame and a driving device, etc., which are installed on the rear surface of the plasma display panel are assembled to form a module of the plasma display panel. To make. Subsequently, a case for determining the appearance of the plasma display panel module is formed to manufacture a plasma display device as a finished product. Here, the structure of the finished product of the plasma display device included in the case for determining the appearance will be described with reference to FIG. 2.

2 is a view showing the structure of the finished product of the conventional plasma display device.

As shown in FIG. 2, a plasma display panel 210 which first outputs a screen, a filter 220 having an electromagnetic shielding function on the front surface of the plasma display panel 210, and a column on the rear surface of the plasma display panel 210 are provided. The heat dissipation sheet 230 emitting the light, the frame 240 formed on the rear surface of the heat dissipation sheet 230 described above, the driving circuit board 250 on the rear surface of the frame 240, and a set 260 for determining the appearance. It is composed. Here, a driving device including the driving circuit board 250 of the plasma display panel 210 will be described with reference to FIG. 3.

3 is a view showing a driving apparatus of a conventional plasma display panel.

As shown in FIG. 3, the driving device of the plasma display panel includes a Y driving circuit board 345, a Z sustainer circuit board 348, a data driver circuit board 350, a control circuit board 342, and a power supply circuit board. (Not shown). The function of each of the circuit boards 342, 345, 348, and 350 is as follows.

First, the Y driving circuit board 345 drives the scan electrode lines Y1 to Ym of the plasma display panel 340.

The Z sustainer circuit board 348 also drives the sustain electrode lines Z1 to Zm.

In addition, the data driver circuit board 350 drives the data electrode lines X1 to Xm.

The control circuit board 342 also controls the Y drive circuit board 345, the Z sustainer circuit board 348, and the data driver circuit board 350.

The power circuit board also supplies power to each of the circuit boards 342, 345, 348, 350.

Herein, the functions of the aforementioned circuit boards 342, 345, 348, and 350 will be described in more detail as follows.

First, the Y driving circuit board 345 may include a scan driver circuit board 344 that generates a reset pulse and a scan pulse of the plasma display panel 340, and a Y sustainer that generates a Y sustain pulse. A circuit board 346 is provided.

Here, the scan driver circuit board 344 transmits the scan pulse SP to the scan electrode lines Y1 to Ym of the plasma display panel 340 via the Y flexible printed circuit 351. Supply.

The Y sustainer circuit board 346 also supplies the Y sustain pulse to the scan electrode lines Y1 to Ym via the scan driver circuit board 344 and the Y fusible print film 351.

Meanwhile, the Z sustainer circuit board 348 generates bias pulses and Z sustain pulses and is applied to the sustain electrode lines Z1 to Zm of the plasma display panel 340 via the Z flexible printed film 352. Supply.

In addition, the data driver circuit board 350 generates a data pulse and supplies the data pulses to the data electrode lines X1 to Xn of the plasma display panel 340 via the X-soluble printing film 354.

The control circuit board 342 also generates each of the X, Y, and Z timing control signals. The control circuit board 342 controls the Y timing control signal through the first flexible printed film 356 to the Y drive circuit board 345 and the Z timing control via the second flexible printed film 358. The signal is supplied to the Z sustainer circuit board 348 and the X timing control signal to the data driver circuit board 350 via the third flexible printed film 360.

However, since each of the circuit boards 342, 345, 348, and 350 described above includes elements that switch at high speed, a lot of heat is generated. Thus, a heater sink is attached to each of the boards 342, 345, 348, 350 to dissipate heat to the outside.

4 is a diagram illustrating a conventional plasma display device with a heater sink.

As shown in FIG. 4, the heater sink 470 attached to each of the circuit boards 442, 445, 448, and 450 described above includes a heat dissipation fin 471 that protrudes to increase a contact surface with air. That is, heat generated by each of the circuit boards 442, 445, 448, and 450 is transferred to the heat dissipation fin 471 through the body 472 of the heat sink attached to the boards, and the heat dissipation fin 471 having a large area is transferred. Heat is released to the outside. The driving device of the plasma display panel quickly conducts a lot of heat generated when driving the driving device to the heat sink 470 to release heat.

5 is a view illustrating a fastening structure between a heater sink, a driving circuit board, and a frame of a conventional plasma display device. First, the driving apparatus of the plasma display panel includes a Y driving circuit board, a Z sustainer circuit board, a data driver circuit board, a control circuit board, and a power supply circuit board. Each of the circuit boards includes a plurality of holes, and the plurality of bosses are arranged to be perpendicularly engaged with the plurality of holes provided in the above-described circuit boards on the frame. Here, for convenience of description, a structure in which the heater sink and the frame are fastened to the control circuit board as an example will be described with reference to FIG. 5.

As shown in FIG. 5, a plurality of second bosses are provided on the conventional control circuit board 530 in order to quickly conduct a large amount of heat generated when driving the driving device of the plasma display panel to dissipate heat. 580b and the second fastening member 550b, and the driving circuit formed on the control circuit board 530 is connected to the frame 520, which is a ground voltage source, under the control circuit board 530 to ground with a ground voltage. It is fastened by a plurality of first boss 580a and the second fastening member 550a. Here, the heater sink 570 includes a heater sink plate 560 and the above-described heater sink plate 560 is fastened to the control circuit board 530 by the second boss 580b and the second fastening member 550b. . In addition, the heat sink 570 includes a circuit board 550 made of a metallic material including a high efficiency FET device in direct contact with the heat sink plate 560 to externally generate heat generated when driving the driving device of the plasma display panel. To release.

However, since the metallic circuit board including the FET device described above has a limitation in dissipating heat to the outside when a large amount of heat is generated when driving the driving circuit board, there are many charged charges generated on the panel surface. Shielding EMI is difficult because it quickly becomes difficult to conduct a frame that is a ground voltage source.

In order to solve the above problems, an object of the present invention is to provide a plasma display device capable of shielding electromagnetic interference generated when the plasma display device is driven.

Plasma display panel of the present invention for solving the above technical problem is formed with a boss for fastening the heat sink and the drive circuit board and the heat sink formed on the drive circuit board and the drive circuit board formed on the frame and the rear surface, the heat The sink and the driving circuit board are grounded by conductive means.

In addition, the conductive means is characterized in that any one of the conductive rod or the conductive tape.

In addition, the conductive means is characterized in that a plurality formed.

In addition, the material of the conductive means is characterized in that it comprises any one or more of Cu, Ag, Ti, Zn, Cr, Al, Au.

The conductive means may include a first ground part grounded with the heat sink, a second ground part grounded with the driving circuit board, and a connection part connecting the first ground part and the second ground part.

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

6 is a view illustrating a fastening structure between a heater sink, a driving circuit board, and a frame of the plasma display device according to the present invention. First, the driving apparatus of the plasma display panel includes a Y driving circuit board, a Z sustainer circuit board, a data driver circuit board, a control circuit board, and a power supply circuit board. Each of the circuit boards includes a plurality of holes, and the plurality of bosses are arranged to be perpendicularly engaged with the plurality of holes provided in the above-described circuit boards on the frame. Here, for convenience of description, a structure in which the heater sink and the frame are fastened by using the control circuit board as an example will be described with reference to FIG. 6.

As illustrated in FIG. 6, a plurality of heat sinks 670 are formed on the control circuit board 630 according to an embodiment of the present invention to quickly conduct a large amount of heat generated when driving the driving device of the plasma display panel to dissipate heat. The second boss 680b and the second fastening member 650b are coupled to each other, and a driving circuit formed on the control circuit board 630 is connected to the frame 620 as a ground voltage source under the control circuit board 630 to provide a ground voltage. The first boss 680a and the second fastening member 650a, which serve to ground, are fastened. Here, the heater sink 670 includes a heater sink plate 660 and the heater sink plate 660 described above is fastened to the control circuit board 630 by the second boss 680b and the second fastening member 650b. . In addition, the heat sink 670 includes a circuit board 650 made of a metallic material including a high efficiency FET device in direct contact with the heat sink plate 660 to externally generate heat generated when the driving device of the plasma display panel is driven. To release. Here, the upper portion of the metallic circuit board 650 and the control circuit board 630 including the above-described FET device are grounded by the conductive means 650c and 680c. The conductive means 650c and 680c are electrically conductive bars. Or any one of conductive tapes, but preferably grounded with a conductive rod. In addition, the material of the conductive means (650c, 680c) is a control circuit and the upper portion of the metallic circuit board 650 including the above-described FET device including any one or more of Cu, Ag, Ti, Zn, Cr, Al, Au It is preferable to ground the circuit board 630.

Here, the aforementioned conductive means 650c and 680c may include a first ground portion 650c grounded with the heat sink 670, a second ground portion 680c grounded with the driving circuit board 630, and a first grounded portion ( 650c and a connection part 610 connecting the second ground part 680c. If the above-mentioned conductive means is further provided, even if a lot of heat is generated during driving, many of the charged charges generated on the panel surface are removed, so that it is possible to quickly conduct the frame to the ground voltage source, which is advantageous for shielding the EMI. Will improve.

Those skilled in the art to which the present invention pertains will understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features. Therefore, the above-described embodiments are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the appended claims rather than the detailed description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

As described above, the present invention has the effect of shielding electromagnetic interference generated when the plasma display panel is driven.

Claims (5)

A frame; A driving circuit board formed on the rear surface of the frame; A heat sink formed on a rear surface of the driving circuit board; A boss for fastening the heat sink and the driving circuit board is formed, And the heat sink and the driving circuit board are grounded by conductive means. The method of claim 1, And a plurality of conductive means are formed. The method of claim 1, And the conductive means is one of a conductive rod and a conductive tape. The method according to claim 1 or 2, The material of the conductive means comprises at least one of Cu, Ag, Ti, Zn, Cr, Al, Au. The method of claim 1, The conductive means, A first ground part grounded with the heat sink; A second ground part which is grounded with the driving circuit board; And a connecting portion connecting the first ground portion and the second ground portion.

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