KR100684725B1 - Module of plasma display panel - Google Patents

Abstract

The present invention relates to a technique for shielding electromagnetic waves emitted from a PDP, and the plasma display module provided in one embodiment includes a plurality of discharge cells and a plurality of electrodes formed therebetween, between a front substrate and a rear substrate, to discharge gas. A plasma display panel having a transparent conductive film for displaying an image by the screen and shielding electromagnetic waves on the front substrate, a chassis base provided to face the plasma display panel, the chassis base having conductivity, and a drive provided on a rear surface of the chassis base; A board, a flexible signal line connecting the electrodes and the driving board across the side of the chassis base, and a ground line electrically connecting the transparent conductive film to the chassis base while substantially surrounding the flexible signal line.

Plasma, transparent conductive film, electromagnetic wave, shielding, PDP

Description

Module with plasma display panel {MODULE OF PLASMA DISPLAY PANEL}

1 is a schematic partial exploded perspective view of a PDP constructed according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line A-A of FIG. 1.

3 is a schematic exploded perspective view of a PDP module constructed according to an embodiment of the present invention.

4 is a cross-sectional view taken along the line B-B of FIG.

The present invention relates to a plasma display panel (hereinafter referred to as 'PDP'), and more particularly, to a PDP having a conductive film that blocks electromagnetic waves and a module having the same.

In general, a PDP is a display in which ultraviolet rays generated from a plasma obtained through gas discharge excite phosphors, and implement an image using visible light generated therefrom.

Such a PDP can realize an ultra-large screen of 60 inches or more within a thickness of only 10 cm, and has a characteristic of excellent color reproducibility and less distortion due to a viewing angle because it is a self-luminous display device such as a CRT. In addition, the manufacturing method is simpler than the liquid crystal display, and thus has advantages in terms of productivity and cost, and thus has been in the spotlight as the next-generation industrial flat panel display and home TV display.

The structure of the PDP has been developed for a long time since the 1970s, and the structure generally known is a three-electrode surface discharge type structure. The three-electrode surface discharge type structure is composed of one front substrate including display electrodes on the same surface and a rear substrate including address electrodes extending in a vertical direction at a distance from the front substrate, with a discharge gas enclosed therebetween. to be. In general, the presence or absence of the discharge is determined by the discharge of the address electrode facing the scan electrode independently connected to each line, and the sustain discharge indicating the luminance is performed by two electrode groups located on the same plane. .

The PDP configured as described above is composed of a PDP device including a chassis base, drive boards fixed to the rear surface of the chassis base, a rear cover surrounding the front cover, and a front cover coupled to the rear cover while surrounding the front circumference of the PDP. In this case, the PDP is installed to face the chassis base, and the driving boards fixed to the rear surface of the PDP are connected by flexible signal lines (eg, FPC, TCP, etc.) positioned around the side of the chassis base.

The glass is provided over the entire surface of the front cover, so as to protect the optical characteristics and the impact of the PDP without covering the image represented by the PDP.

The PDP device configured as described above drives the PDP using an alternating voltage of about 180 volts (V), and a number of circuit elements are mounted therein to control the PDP. Therefore, the PDP device emits a very high level of electromagnetic waves during its operation.

In consideration of this point, the PDP device installs an electromagnetic wave shielding filter in the glass installed on the front cover to prevent the electromagnetic waves from radiating to the front of the device. This blocking filter is electrically connected to the front cover to ground. Thus, at least the front cover is made of a conductive metal, which increases the weight of the PDP device, contrary to the trend of lighter weight of the device.

On the other hand, since the flexible signal line connecting the driving board and the PDP transmits a high voltage AC signal to the PDP, this part also emits a high level of electromagnetic waves. Therefore, there is a need to propose a technique capable of blocking electromagnetic waves transmitted by this flexible signal line.

Accordingly, the present invention has been made to solve the above problems, and to provide a PDP of the present invention and a module having the same improved to easily block the electromagnetic waves emitted from the front surface of the PDP.

In addition, another object of the present invention is to provide a module of the present invention improved to easily block the electromagnetic wave emitted to the side through the flexible signal line.

In order to achieve the above object, the plasma display panel provided in one embodiment of the present invention,

A front substrate and a rear substrate facing each other, an address electrode formed at any one of the substrates, a partition wall disposed in a space between the front substrate and the rear substrate to partition a plurality of discharge cells, a phosphor layer formed in the discharge cells, And a pair of display electrodes formed along the discharge cells and intersecting the address electrodes, and a transparent conductive film to shield electromagnetic waves on the front substrate.

In the present invention, the transparent conductive film is preferably formed over the entire surface of the front substrate.

And, the plasma display module provided in another embodiment of the present invention,

A plasma display panel comprising a plurality of discharge cells and a plurality of electrodes formed therebetween to display an image by gas discharge, and a transparent conductive film to shield electromagnetic waves on the front substrate. A chassis base having a conductive surface opposite to the display panel and having a conductive base, a driving board installed at a rear surface of the chassis base, a flexible signal line connecting the electrodes and the driving board across the side of the chassis base, and the flexible signal line And a ground wire electrically connecting the transparent conductive film to the chassis base while substantially enclosing.

In the present invention, the flexible signal line is positioned inward while crossing the side surface of the chassis base, and the ground line is formed while surrounding the flexible signal line.

In addition, the flexible signal line may be formed in plural, and in this case, the ground line may be formed to be larger than the width of the combined flexible signal line so as to substantially surround the plurality of flexible signal lines.

In addition, in the present invention, the ground wire may be formed in plural and may have a structure connected to the chassis base while surrounding the side surface of the chassis base.

Further, in the present invention, the flexible signal line is formed to cross both longitudinal sides of the chassis base, and the ground line may be formed correspondingly.

And, the plasma display module provided in another embodiment of the present invention,

A plasma display panel comprising a plurality of discharge cells and a plurality of electrodes formed therebetween to display an image by gas discharge, and a transparent conductive film to shield electromagnetic waves on the front substrate. A chassis base disposed to face each other with a display panel, a driving board installed at a rear surface of the chassis base, a flexible signal line connecting the electrodes and the driving board across the side of the chassis base, and substantially surrounding the flexible signal line And a ground wire for stacking and electrically connecting the transparent conductive film to the driving board.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

FIG. 1 is a partially exploded perspective view illustrating a plasma display panel configured according to an exemplary embodiment of the present invention, and FIG. 2 is a partially joined cross-sectional view taken along the line A-A of FIG. 1.

As shown in the figure, the PDP 100 is arranged with the rear substrate 10 and the front substrate 20 facing each other at predetermined intervals, and are formed by partitions 16 in the spaces between the substrates 10 and 20. Color discharge cells 18 (18; 18R, 18G, 18B) is formed into a structure that is provided. In the discharge cell 18, a phosphor layer 19, which is excited by ultraviolet rays and emits visible light, is formed along the wall surface 161 of the partition wall and the bottom surface 141 of the partition wall, and discharge gas ( For example, a mixed gas including xenon, neon, and the like is filled.

The front substrate 20 is formed of a transparent material such as glass through which visible light can be transmitted so that an image is displayed.

A transparent conductive film 31 is formed over the entire surface 211 of the front substrate 20. This transparent conductive film 31 shields electromagnetic waves emitted to the entire surface of the PDP. To this end, the transparent conductive film 31 is connected to the chassis base 200 to form a ground, which will be described together with the description of the PDP module.

The transparent conductive film 31 may be formed by coating a transparent and conductive material, such as ITO, on the entire surface 211 of the front substrate 20. The transparent conductive film 31 may be formed through a semiconductor process such as sputtering, vacuum deposition, or chemical vapor deposition. Of course, it can also be formed by the lamination method.

As described above, the front substrate 20 having the transparent conductive film 31 as the surface 211 has the display electrodes 25 in one direction (the x-axis direction of the drawing) in the lower surface 201 of each discharge cell 18. It is formed to correspond to. These display electrodes 25 are composed of a scanning electrode 21 and a sustain electrode 23 in their functional operation. The scan electrode 21 selects a discharge cell that is turned on by working with the address electrode 12, and the sustain electrode 23 works with the scan electrode 21 to generate sustain discharge for the selected discharge cell.

The display electrodes 25 are covered by a dielectric layer 28 formed of a dielectric such as PbO, B ₂ O ₃ , SiO _2, or the like. The dielectric layer 28 prevents charged particles from directly colliding with the display electrodes 25 during discharge and damaging the display electrodes 25, and serves to guide the charged particles.

The lower surface 281 of the dielectric layer 28 may be covered by a protective film 29 formed of MgO or the like. In the protective film 29, charged particles directly collide with the dielectric layer 28 during discharge, and thus the dielectric layer 28 ), And when charged particles collide with each other, the secondary electrons may be discharged to increase discharge efficiency.

In addition, the upper surface 101 of the rear substrate 10 facing the front substrate 20 extends in the direction in which the address electrodes 12 intersect the display electrodes 25 (y-axis direction in the drawing), and are spaced apart from each other. In this state, the discharge cells are arranged in a form corresponding to each discharge cell. The address electrodes 12 are covered with a dielectric layer 14 and embedded therein, and the partition wall 16 is formed in a predetermined pattern on the dielectric layer 14.

The partition wall 16 divides the discharge cells 18, which are discharge spaces in which discharge is performed, to prevent cross talk between adjacent discharge cells 18. As shown, the partition 16 is mutually spaced apart from each other in a direction intersecting the vertical partitions 16a on the same plane as the vertical partitions 16a and the vertical partitions 16a. The horizontal partition walls 16b extending apart from each other define the discharge cells 18 having a closed structure. In the present embodiment, such a barrier rib structure is described as a preferred form, and thus, a barrier rib structure having various shapes such as a stripe-type barrier rib structure formed in parallel with the address electrode 12 while being located between the address electrodes 12 is also possible. Of course.

In the discharge cells 18, a phosphor layer 19 that emits visible light by being excited by ultraviolet rays generated during discharge is formed. This phosphor layer 19 is formed over the wall surface 161 of the partition 16 and the lower surface 141 of the dielectric layer 14 defined by the partition 16. The phosphor layer 19 may be formed by selecting any one of red, green, and blue phosphors for color expression, and thus divided into red, green, and blue phosphor layers 18R, 18G, and 18B. Can be. As described above, a discharge gas in which neon (Ne), xenon (Xe), and the like are mixed is filled in the discharge cells 18 in which the phosphor layer 19 is disposed.

As such, the PDP 100 configured as described above is combined with the chassis base 200 and the driving board 300 to form a PDP module, and the front cover and the rear cover are respectively coupled to the front and rear surfaces of the PDP module to form a PDP device. Will be constructed.

Hereinafter, a PDP module constructed according to an embodiment of the present invention will be described with reference to FIGS. 3 and 4.

Referring to FIG. 3, the PDP module 500 of this embodiment includes a PDP 100 having a conductive film 31 transparent to the front surface, a chassis base 200 and a chassis base 200 supporting the PDP 100. It includes a drive board 300 is installed on.

The PDP 100 is configured as described above and includes the transparent conductive film 31 as a whole on the surface 211 of the front substrate 20. The transparent conductive film 31 serves to shield the electromagnetic waves generated during the operation of the PDP 100 from radiating to the entire surface of the PDP 100. To this end, the transparent conductive film 31 is made of a conductive material (eg, ITO) and is connected to the chassis base 200 (or the driving board) to form a ground. As such, since the PDP 100 includes the transparent conductive film 31, electromagnetic waves generated during the operation of the PDP are absorbed through the transparent conductive film 31, and are transmitted to and removed from the chassis base 200. In addition, the following description describes a configuration in which the transparent conductive film 31 is connected to the chassis base 200, but may also be configured in the driving board 300 in the same manner.

The chassis base 200 has a structural rigidity sufficient to support the PDP 100 and has a plate shape to mount the driving board 300 on its body. In addition, the chassis base 200 is formed of a metal material such as aluminum, copper, iron, etc. by forming a ground of these in order to effectively reduce the electromagnetic waves generated from the PDP 100 and the drive board (300).

The PDP 100 and the chassis base 200 formed as described above are coupled to each other through surface contact in a form in which the rear surface of the PDP 100, that is, the opposite surface of the rear substrate 20 and the front surface of the chassis base 200 face each other. do. At this time, between the two is generally fixed via the double-sided tape 121, between them forms a structure in which a heat transfer member for diffusing heat generated from the PDP is added.

In addition, a plurality of driving boards 300 for transmitting electrical signals to the display electrode 25 and the address electrode 12 of the PDP 100 are connected to the rear surface of the chassis base 200 via a boss. It is fixed to the chassis base 200. In this case, the display electrode 25 and the address electrode 12 formed on the driving board 300 and the PDP 100 are connected through a flexible signal line 311 such as a flexible printed circuit (FPC) and a tape career package (TCP). It is connected to the drive board 300.

Referring to FIG. 3, the flexible signal line 311 connected to the display electrode 25 extends across the longitudinal side 200a of the chassis base 200 to the PDP 100 so as to display the display electrode 25 therein. Connected with

In addition, a ground line 321 is further provided on the flexible signal line 311 to connect the conductive film 31 to the chassis base 200 across the longitudinal side 200a of the chassis base 200.

The ground line 321 connects the transparent conductive film 31 provided on the front surface of the PDP 100 with the chassis base 200 (or the driving board). It is formed with enough width to encircle the edges. Although the drawing shows an example in which one ground line 321 is formed in one piece, a plurality of ground lines 321 may be formed.

The relationship between the ground line 321 and the chassis base 200 will be described with reference to FIG. 4 as follows. 4 is a schematic partial cross-sectional view cut along the line B-B of FIG. 3.

Referring to this figure, the flexible signal line 311 is connected to the terminal portion 10a of the display electrode 25 and extends across the chassis base 200 to the driving board 300.

The ground wire 321 is fixed to a part 321a of the end thereof in contact with the edge 31a of the transparent conductive film 31. The flexible signal line 311 extends to the chassis base 200 while surrounding the edge of the PDP 100 with the flexible signal line 311 positioned inward. On the other hand, the connection member 200b is installed at the edge of the chassis base 200. The connection member 200b is coupled to the ground line 321 to connect the ground line 321 to the chassis base 200.

Accordingly, as shown in the cross section of FIG. 4, the flexible signal line 311 is provided while surrounding the edge of the PDP module 500, and the ground line 321 surrounds the flexible signal line 311 thereon. Formation.

As described above, the flexible signal line 311 transmitting the high voltage AC signal in the PDP module 500 of the present embodiment is shielded by the ground line 321 forming the ground of the transparent conductive film 31. While the ground line 321 effectively removes the electromagnetic waves emitted from the 311, the electromagnetic waves emitted to the entire surface of the PDP can also be effectively removed by the transparent conductive film 31.

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto and is intended by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

As described above, according to the present invention, by providing a transparent conductive film on the front surface of the PDP, electromagnetic waves emitted toward the front surface of the PDP can be easily removed. There is an effect that can block.

Claims (14)

delete delete A plasma display panel including a plurality of discharge cells and a plurality of electrodes formed therebetween to display an image by gas discharge, and to have a transparent conductive film shielding electromagnetic waves on the front substrate; A chassis base provided to face the plasma display panel and having a conductivity; A driving board installed at a rear surface of the chassis base; A flexible signal line connecting the electrodes and the driving board across the side of the chassis base; And, A ground line electrically connecting the transparent conductive layer to the chassis base while surrounding the flexible signal line with the flexible signal line located inside; Plasma display panel module comprising a. The method of claim 3, And the transparent conductive film is formed over the entire front substrate. delete The method of claim 3, The flexible signal line is formed in plural, And the ground line is formed to be larger than the width of the combined flexible signal lines to surround the plurality of flexible signal lines. The method of claim 3, And a plurality of ground wires formed around the side surface of the chassis base and connected to the chassis base. The method of claim 3, And the flexible signal line is formed to cross both longitudinal sides of the chassis base, and the ground line is correspondingly formed. A plasma display panel including a plurality of discharge cells and a plurality of electrodes formed therebetween to display an image by gas discharge, and to have a transparent conductive film shielding electromagnetic waves on the front substrate; A chassis base installed to face the plasma display panel; A driving board installed at a rear surface of the chassis base; A flexible signal line connecting the electrodes and the driving board across the side of the chassis base; And, A ground line electrically connecting the transparent conductive film to the driving board while surrounding the flexible signal line so that the flexible signal line is located inside; Plasma display panel module comprising a. The method of claim 9, And the transparent conductive film is formed over the entire front substrate. delete The method of claim 9, The flexible signal line is formed in plural, And the ground line is formed to be larger than the width of the flexible signal line in which the plurality of ground lines are combined to surround the plurality of flexible signal lines. The method of claim 9, And a plurality of ground wires formed around the side surface of the chassis base and connected to the driving board. The method of claim 9, And the flexible signal line is formed to cross both longitudinal sides of the chassis base, and the ground line is correspondingly formed.

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