KR100686803B1 - Plasma display device - Google Patents

Abstract

The present invention relates to a plasma display device, and the technical problem to be solved is to improve the ground structure of the driving board to ensure stable driving performance of the plasma display panel, and all the screws that couple the driving board to the chassis base serve as ground and support. By the combination of the two, it is possible to shorten the assembly time of the drive board by removing the screw for the support of the drive board.

To this end, the subject matter of the present invention is a plasma display panel, a chassis base coupled to the back of the plasma display panel, and at least one driving board coupled to the back of the chassis base to apply various electrical signals to the plasma display panel. And a ground member interposed between the chassis base and the driving board and grounding the driving board to the chassis base.

Plasma display panel, chassis base, drive board, ground member, fixed member

Description

Plasma display device

1 is a perspective view showing a plasma display device according to the present invention.

2 is a partially exploded perspective view of the plasma display device according to the present invention.

3 is an enlarged perspective view illustrating three regions of FIG. 2.

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

FIG. 5 is an enlarged cross-sectional view of region 5 of FIG. 4.

<Description of Symbols for Main Parts of Drawings>

100; Plasma display device according to the present invention

110; Plasma display panel 111; Front panel

112; Rear panel 113; Heatsink

114; Adhesive layer 120; Chassis base

121; Flange 122; Reinforcement

123; Boss 130; Driving board

131; Circuit element 132; hall

133; Flexible Printed Circuit (FPC) 134; Insulation layer

134a; First side 134b; The second page

135; Ground pattern 136; Power pattern

137; Signal pattern 139; Fixing member

140; Ground member 141; First area

142; Second region 143; Third area

144; hall

The present invention relates to a plasma display device, and more particularly, to improve a ground structure of a driving board to secure driving performance of a stable plasma display panel and to reduce assembly time by reducing the number of screws for supporting a driving board. It relates to a display device.

Plasma display devices have the most suitable for large size among flat panel display devices in various fields, such as liquid crystal display (LCD), field emission display (FED), and electroluminescence display (ELD), which are being actively studied. The reason why such a plasma display device can be enlarged as a flat plate is to form an electrode and a phosphor on each substrate by using two glass substrates each having a thickness of about 3 mm and forming a relatively less sophisticated printing (or deposition) method on the substrate. This is because a simple structure and method for forming plasma in space are adopted. That is, in the case of LCD, many transistors must be formed on a glass substrate by a very precise thin film process, and thus, there are many difficulties in large-sized, and in the case of ELD, since the commercialization has started, much research and development is still required.

Such a plasma display apparatus typically includes a plasma display panel in which an image is realized, a chassis base on which the plasma display panel is mounted and supported, and a plurality of bosses are coupled to each other, and coupled to a boss of the chassis base by a screw to the plasma display panel. It consists of a number of drive boards that generate and transmit various electrical signals.

The plasma display panel includes a front substrate and a rear substrate coupled to each other. The front substrate and the rear substrate each include a plurality of scan electrodes and a plurality of address electrodes, and a so-called discharge cell is provided between the electrodes.

The plasma display panel configured as described above implements a predetermined image by selectively discharging discharge cells. To this end, the plasma display panel needs to receive a predetermined electrical signal from a driving board coupled to the boss of the chassis base. To this end, the driving board and the plasma display panel are interconnected by a flexible printed circuit (FPC).

However, in order for the accurate driving signal to be stably transmitted from the driving board to the plasma display panel, the ground structure of the driving board for generating and transmitting various electrical signals must be stably maintained. In other words, the ground structure of the FPC and the circuit elements mounted on the driving board must be stably maintained.

According to the prior art, a ground pattern (copper foil) for grounding various circuit elements or an FPC is formed in a predetermined region of the driving board, and the ground pattern of the driving board is coupled to and grounded by a boss fixed to the chassis base by a conductive screw. It becomes the structure that becomes. That is, the ground pattern of the drive board is grounded and fixed to the chassis base through screws and bosses. Of course, both the boss and chassis base are conductors.

However, the ground board is usually formed only in a predetermined area on the driving board. That is, the ground pattern is not uniformly formed in all areas of the driving board. Therefore, not all screws that penetrate the drive board and are coupled to the boss are used as ground paths, and ground signals are concentrated to the boss and chassis base only through specific screws. As such, when the ground signal is concentrated only through a specific screw, the current path is small, and therefore, its resistance is increased and the noise generated in and out of the device is not efficiently absorbed and removed, and thus the ground voltage is not constant. Of course, the inconsistent ground voltage means that the stability of the electrical signal transmitted to the plasma display panel through the driving board is also reduced.

In addition, since the ground of the driving board is made only by a specific screw and boss, ground defects may easily occur due to external shock or vibration. In particular, the recent discharge cells are increasingly finer, requiring a larger number of driving boards and circuit elements, and thus more ground defects may occur.

In addition, such a conventional structure does not all the screws that couple the drive board to the chassis base serves as a ground, only a few screws through the ground pattern serves as a ground. Therefore, the screw other than the screw for the ground is for stably fixing and supporting the drive board to the chassis base, and the number of screws is unnecessary. Of course, there is a problem that the assembly time of the drive board takes a long time. For example, some drive boards have a screw for supporting the drive board without serving as a ground, since the screw responsible for the ground is concentrated on only one side of the drive board.

SUMMARY OF THE INVENTION The present invention has been made to overcome the above-mentioned problems, and an object of the present invention is to provide a plasma display apparatus capable of securing stable driving performance of a plasma display panel by improving a ground structure of a driving board.

It is another object of the present invention to provide a plasma display apparatus capable of shortening the assembly time of the driving board by removing the screws for only the support of the driving board by all the screws that couple the driving board to the chassis base. It is.

In order to achieve the above object, a plasma display apparatus according to the present invention includes at least a plasma display panel, a chassis base coupled to a rear surface of the plasma display panel, and a rear surface coupled to the chassis base to apply various electrical signals to the plasma display panel. And at least one driving board and a ground member interposed between the chassis base and the driving board to ground a predetermined region of the driving board to the chassis base.

Here, at least one boss is coupled to the chassis base, and a ground member is in close contact with the boss.

In addition, a predetermined area of the driving board is in close contact with the ground member, and a ground pattern may be formed in the close area of the driving board.

Moreover, the drive board (ie, ground pattern) and the ground member are grounded and supported at the same time by the conductive fixing member.

In this manner, in the plasma display device according to the present invention, all the fixing members electrically / mechanically couple the driving board to the ground member and the boss, thereby improving the ground structure of the driving board. That is, since the ground member almost covers one surface of the driving board, the resistance to the ground signal is reduced, and the ground member absorbs and removes various noises generated inside and outside the apparatus.

In addition, in the plasma display apparatus according to the present invention, since the ground voltage is constant in a wide area of the driving board, the stability of the electrical signal transmitted to the plasma display panel is further improved. That is, the operating performance of the plasma display panel is improved. Of course, all the fastening members penetrate the driving board and the ground member to the boss, so that the mechanical ground structure is also improved.

In addition, in the plasma display apparatus according to the present invention, since all fixing members for coupling the driving board to the boss of the chassis base serve as ground and support, there is no need to separately use the fixing member for supporting the driving board separately. By reducing the number of fixing members it is possible to shorten the assembly time of the drive board.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings such that those skilled in the art may easily implement the present invention.

Referring to FIG. 1, a perspective view of a plasma display device according to the present invention is shown, and referring to FIG. 2, a partially exploded perspective view of a plasma display device according to the present invention is shown. For convenience of description, reference will be made to FIGS. 1 and 2 at the same time.

As shown in the drawing, the plasma display apparatus 100 includes a plasma display panel 110, a chassis base 120 coupled to the plasma display panel 110, and a chassis base 120 coupled to the chassis base 120. At least one driving board 130 that applies various electrical signals to the plasma display panel 110, and interposed between the chassis base 120 and the driving board 130, thereby driving the driving board 130 to the chassis base. And a ground member 140 to ground to 120.

The plasma display panel 110 is formed of a combination of an approximately rectangular or square front panel 111 and a rear panel 112, and emits a phosphor by ultraviolet rays generated during gas discharge therein, thereby realizing a predetermined image. do. More specifically, the plasma display panel 110 may include a discharge cell (not shown) formed by the front panel 111 and the rear panel 112, and a discharge gas charged in the discharge cell to generate a discharge. And an electrode to which a phosphor and a voltage applied to a surface of the discharge cell are applied, and a discharge is generated in the discharge cell by an alternating current or a direct current voltage applied between the electrodes, and thus ultraviolet rays emitted from the discharge gas. The phosphor is excited to emit visible light, thereby realizing a predetermined image.

Here, a heat sink 113 having a predetermined thickness is coupled to a rear surface of the rear panel 112 of the plasma display panel 110 to quickly discharge heat generated during operation to the outside. In addition, the outer periphery of the heat sink 113 is bonded to the adhesive layer 114 of a predetermined thickness so that the chassis base 120 can be fixed.

The chassis base 120 is formed of a metal material in a substantially rectangular or square shape, and is bonded to the adhesive layer 114 formed on the rear panel 112 of the plasma display panel 110. That is, the plasma display panel 110 and the chassis base 120 are in a state of being bonded to each other by the adhesive layer 114. In addition, the chassis base 120 may be generally formed of any one selected from aluminum alloy, stainless steel, galvanized steel, copper alloy, or equivalent thereof having good thermal conductivity and light weight. It is not. In addition, the chassis base 120 is further provided with a flange 121 bent at a predetermined angle on four sides so that strength is not easily bent, and the reinforcement member 122 is formed in a predetermined region that does not overlap with the driving board 130. May be further attached, but the flange 121 and the reinforcing member 122 is not limited to the present invention. Furthermore, the chassis base 120 is further coupled to a plurality of cylindrical bosses 123 protruding a predetermined length so that at least one or more driving boards 130 may be mounted on the rear surface. The boss 123 may also be formed of any one selected from ordinary aluminum alloys, stainless steels, galvanized steels, copper alloys, or equivalents thereof, but the present invention is not limited thereto.

The driving board 130 is a printed circuit board having a plurality of circuit elements 131 mounted on a surface thereof in a substantially rectangular or square shape. In addition, the driving board 130 has a hole 132 formed in approximately four corners. The driving board 130 is fixed to the boss 123 formed in the chassis base 120 by coupling the fixing member 139 to the hole 132. In addition, the driving board is electrically connected to the plasma display panel 110 by various flexible printed circuits (FPCs 133) including a tape carrier package (TCP). Of course, the driving boards 130 may be connected to each other by the FPC 133. In addition, the driving board 130 may include an address electrode driving board, a scan electrode driving board, a power supply driving board, an image control driving board, and the like, which are required for driving the plasma display panel 110. Will be generically referred to as the drive board (130).

The ground member 140 is interposed between the chassis base 120 and the driving board 130. That is, the ground member 140 is interposed between the boss 123 fixed to the chassis base 120 and the driving board 130. In addition, the ground member 140 has holes 144 formed in regions corresponding to the holes 132 of the boss 123 and the driving board 130. Accordingly, the fixing member 139 penetrating the hole 132 of the driving board 130 is coupled to the boss 123 while penetrating the hole 144 of the ground member 140. Therefore, all the fixing members 139 passing through the driving board 130 are in a state of being electrically connected to the ground member 140. In addition, since the ground member 140 almost covers four sides of the driving board 130, absorption and removal efficiency of various kinds of electromagnetic noises that may affect the driving board 130 inside and outside the device is good.

In addition, although the ground member 140 is installed in an area corresponding to the specific driving board 130 in FIG. 2, the ground member 140 may be installed on all the driving boards 130 coupled to the chassis base 120. Naturally, it can be applied. In addition, the ground member 140 may be formed of any one selected from aluminum alloy, stainless steel, galvanized steel, copper alloy, or an equivalent thereof, but the material is not limited thereto.

Furthermore, the fixing member 139 that couples the drive board 130 and the ground member 140 to the boss 123 is also conductive, which can be any one selected from conventional screws, screws, bolts or the like, The kind is not limited here.

Referring to FIG. 3, a perspective view showing an enlarged view of three regions of FIG. 2 is illustrated, and referring to FIG. 4, a cross-sectional view taken along line 4-4 of FIG. 1 is illustrated. 3 and 4 will be referred to together for convenience of description.

As shown in FIG. 3, the ground member 140 is interposed between the boss 123 and the driving board 130, which may be formed in a substantially rectangular ring shape having a predetermined width. However, the present invention is not limited to the rectangular ring shape, and it should be recognized that various other forms are possible. In addition, each of the ground members 140 has holes 144 formed at four corners, and the holes 144 are positioned at the same positions as the holes 132 formed in the driving board 130. Of course, the conductive fixing member 139 is coupled through the hole 132 of the driving board 130 and the hole 144 of the ground member 140, and the end of the conductive fixing member 139 is a boss 123. ) Is combined.

In addition, the ground member 140 includes at least one first region 141 in contact with the driving board 130, and is connected to the first region 141 at the same time to be bent at a predetermined angle to form the second region 142. ) Is formed, and the second region 142 is formed with a third region 143 interconnecting them. Of course, the first region 141 and the third region 143 form different planes. In addition, the holes 144 are formed in the respective first regions 141.

The reason why the ground member 140 is formed of the first region 141, the second region 142, and the third region 143 is as shown in FIG. 4. The predetermined region (first region 141) is shown in FIG. 4. Only the driving board 130 is in close contact with the rest of the region (ie, the second region 142 and the third region 143) is not in close contact with the driving board 130, thereby possibly driving board 130 In order to prevent a short between the signal pattern or the power pattern (not shown) and the ground member 140. This will be described in more detail below.

Here, as shown in FIG. 4, the ground member 140 may be applied to other driving boards positioned above and below the driving board 130 described above.

Referring to FIG. 5, there is shown an enlarged cross-sectional view of the five regions of FIG. 4.

First, the driving board 130 includes an insulating layer 134 having a substantially flat first surface 134a and a substantially flat second surface 134b as an opposite surface of the first surface 134a. In addition, various wiring patterns are formed on the first surface 134a and the second surface 134b of the insulating layer 134. Of course, the wiring pattern includes a conventional ground pattern 135, a power pattern 136, and a signal pattern 137. In addition, a predetermined circuit element (not shown) is electrically connected to the ground pattern 135, the power pattern 136, and the signal pattern 137.

Here, the ground pattern 135 is generally formed on the first surface 134a or / and the second surface 134b of the insulating layer 134 corresponding to the boss 123. That is, the ground pattern 135 is formed around the hole 132 through which the fixing member 139 passes. Accordingly, the fixing member 139 is naturally electrically connected to the ground pattern 135 while passing through the hole 132 of the insulating layer 134.

In addition, the first region 141 of the ground member 140 is in close contact with the second surface 134b of the insulating layer 134 of the driving board 130. In addition, the fixing member 139 is coupled to the boss 123 while passing through the hole 144 of the ground member 140. In other words, the fixing member 139 is coupled to the boss 123 while passing through the hole 132 of the driving board 130 and the hole 144 of the ground member 140. Therefore, the ground pattern 135 and the ground member 140 of the driving board 130 are electrically connected to the boss 123 and mechanically fixed.

In addition, as described above, the power pattern 136 and the signal pattern 137 are formed on the driving board 130 as well as the ground pattern 135. For example, the power pattern 136 and the signal pattern 137 may be formed on the second surface of the insulating layer 134 corresponding to the second region 142 or the third region 143 of the ground member 140. 134b). However, since the second region 142 and the third region 143 are spaced apart from the driving board 130 by a predetermined distance, the second region 142 and the third region 143 are not directly shorted with the power pattern 136 and the signal pattern 137. Of course, since the power pattern 136 and the signal pattern 137 are covered with the solder mask 138, a short phenomenon with the ground member 140 is more effectively prevented. However, in some cases, since the solder mask 138 is not formed and the power pattern 136 and the signal pattern 137 may be directly exposed to the outside, the second region 142 of the ground member 140. The third region 143 may be spaced apart from the driving board 130 by a predetermined distance.

In addition, although the ground pattern 135 formed on the first surface 134a of the insulating layer 134 is covered with the solder mask 138, the solder mask 138 is not formed around the hole 132. As a result, the connection state with the fixing member 139 is improved.

In addition, in the drawing, the ground pattern 135 formed on the second surface 134b of the insulating layer 134 is covered with the solder mask 138, but the solder mask 138 is formed to have good contact with the ground member 140. It may not be formed.

Next, the operation of the plasma display device according to the present invention will be described.

In the plasma display apparatus 100 according to the present invention, a ground member 140 is further interposed between the boss 123 coupled to the chassis base 120 and the driving board 130. Of course, the chassis base 120 and boss 123 are both conductors. In addition, the ground member 140 is formed to almost cover the four sides of one side of the drive board 130.

Meanwhile, through the conductive fixing member 139, the driving board 130 and the ground member 140 are grounded and supported by the boss 123 together. Of course, the ground pattern 135 may be formed in a predetermined region of the driving board 130 through which the conductive fixing member 139 passes.

Therefore, when the driving board 130 is grounded to the boss 123 through the ground member 140 by one of the fixing members 139, all of the fixing members 139 penetrating through the area without the remaining ground pattern are also grounded. It becomes a path. Furthermore, since the ground member 140 is formed to almost cover four sides of one surface of the driving board 130, a ground path of a very wide area is secured. That is, the ground structure of the driving board 130 is improved, thereby reducing the resistance to the ground signal, thereby improving the efficiency of absorbing and removing various electromagnetic noises generated from inside and outside the device. In addition, since the ground voltage becomes constant, electrical signals transmitted to the plasma display panel 110 through the driving board 130 are also very stable.

In addition, as described above, all of the fixing members 139 for fixing the driving board 130 are grounded and fixed to the ground member 140, so that there is no separate fixing member for supporting the driving board 130 without the ground. do. That is, the number of fixing members 139 only for supporting the driving board 130 may be reduced, thereby significantly reducing the assembly time of the driving board 130.

In this manner, in the plasma display device according to the present invention, all the fixing members electrically / mechanically couple the driving board to the ground member and the boss, thereby improving the ground structure of the driving board. That is, since the ground member almost covers one surface of the driving board, the resistance to the ground signal is reduced, and the ground member absorbs and removes various noises generated inside and outside the apparatus.

In addition, in the plasma display apparatus according to the present invention, since the ground voltage is constant in a wide area of the driving board, the stability of the electrical signal transmitted to the plasma display panel is further improved. That is, the operating performance of the plasma display panel is improved. Of course, all the fastening members penetrate the driving board and the ground member to the boss, so that the mechanical ground structure is also improved.

In addition, in the plasma display apparatus according to the present invention, since all fixing members for coupling the driving board to the boss of the chassis base serve as the ground and the supporting role, there is no need to separately use the fixing members for supporting the driving board separately. By reducing the number of fixing members it is possible to shorten the assembly time of the drive board.

What has been described above is just one embodiment for implementing the plasma display device according to the present invention, and the present invention is not limited to the above-described embodiment, and as claimed in the following claims, the gist of the present invention Without departing from the scope of the present invention, any person having ordinary skill in the art will have the technical spirit of the present invention to the extent that various modifications can be made.

Claims (13)

Plasma display panel, A chassis base coupled to a rear surface of the plasma display panel; At least one driving board coupled to a rear surface of the chassis base to apply various electrical signals to the plasma display panel; At least one boss interposed between the chassis base and the driving board; A ground member interposed integrally between the boss and the driving board and between the chassis base and the driving board to ground the driving board to the chassis base through the boss; And the ground member is formed in a ring shape having a predetermined width along an inner circumferential side of the driving board. delete The plasma display apparatus of claim 1, wherein one end of the boss is coupled to the chassis base. The plasma display apparatus of claim 1, wherein the driving board further comprises a ground pattern in an area corresponding to the boss. The plasma display apparatus of claim 4, wherein the ground pattern and the ground member of the driving board are electrically and mechanically coupled to the boss through at least one fixing member. The plasma display apparatus of claim 5, wherein the fixing member is a conductor. The plasma display apparatus of claim 6, wherein the fixing member is any one selected from a conductive screw, a screw, and a bolt. The plasma display apparatus of claim 1, wherein the ground member is bent at a predetermined angle to a region outside the region in contact with the boss and is spaced apart from the driving board and the chassis base by a predetermined distance. delete The plasma display apparatus of claim 1, wherein the ground member is formed in a rectangular ring shape having a predetermined width along an inner circumferential edge of the driving board. 2. The ground member of claim 1, wherein the ground member is connected to both sides of the first region and the four first regions in contact with the driving board and the boss, and is bent at a predetermined angle at a time to be bent at a predetermined distance from the driving board and the chassis base. At least one second region spaced apart from each other, the third region being interconnected to each of the second regions and formed in an area corresponding to an inner circumferential side of the driving board while being spaced apart from the driving board and the chassis base by a predetermined distance; Plasma display device comprising a. The plasma display apparatus of claim 1, wherein the ground member is coupled to the boss by a portion corresponding to an edge of the ground member. The plasma display apparatus of claim 1, wherein the ground member is formed of one selected from copper, aluminum, steel, and alloys thereof.

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