JP2007049243A - Plasma display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the leakage of an electromagnetic wave from a match of a shield cover. <P>SOLUTION: The plasma display comprises a plasma display assembly 22, a frame 27 secured to the assembly and to which a coupling shaft 46b of a stand 28 is attached in order to support the assembly, and a shield cover 25 for shielding an electromagnetic wave radiated to the back and the side face of the assembly by covering the portion of the assembly from the back to the side face thereof. Notches 51A and 51B are formed in the shield cover to reach the side edge thereof and to open at a position opposing the stand attaching portion 41 of the frame 27 to which the coupling shaft 46b is attached. A conductive shielding bracket is provided to cover at least a part of a gap formed by the notch and the frame, and connected electrically with at least either of the plasma display assembly and the shield cover. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a plasma display device including a plasma display that emits electromagnetic waves, and in particular, a plasma display that prevents or suppresses leakage of electromagnetic waves to the outside from a gap formed by providing a support portion that supports the plasma display. It relates to the device.

  As a conventional plasma display device of this type, for example, there is one described in Patent Document 1. Patent Document 1 describes an optical filter mounting device for mounting an optical filter on the front side of the image display device and an image display device having the optical filter mounting device. The optical filter mounting apparatus described in Patent Document 1 is “an optical filter for mounting an optical filter having an electromagnetic shield portion for shielding the electromagnetic unnecessary radiation to prevent the electromagnetic unnecessary radiation generated by the image display portion”. A front case that fits and holds each end of the optical filter, and the image display unit is disposed in a space between the optical filter and fixed to the front case. A back casing, an electrode part of the electromagnetic shield part of the optical filter, and the back casing electrically connected directly to each other, so that the optical filter, the back casing, and the optical filter And an electrical contact for forming an electrical conduction loop ”.

According to the optical filter mounting device described in Patent Document 1 having such a configuration, “the number of screws to be used can be greatly reduced, and the assembly time and disassembly time during the manufacturing process and repair service of the image display device can be reduced. It is expected to have the effect of being able to reduce.
JP 2004-170624 A

  FIG. 12 is an exploded perspective view of the plasma display television 1 according to the prior art of the plasma display device using the plasma display, as viewed from the back side. The plasma display television 1 includes a plasma display assembly 2 in which a plasma display and a power supply substrate are assembled, a filter glass 3 that covers the front surface of the plasma display assembly 2, and a front cover that surrounds the front side of the filter glass 3. 4 and a shield cover 5 that covers the back surface of the plasma display assembly 2, a rear cover 6 that covers the back surface of the shield cover 5, and the like. These plasma display assemblies 2 and the like are overlapped with each other in the front-rear direction, and in that state, are fastened and fixed detachably by fixing means such as fixing screws.

  Two frames 7 and 7 are attached to the back surface of the plasma display assembly 2 at a predetermined interval in the left-right direction. The two frames 7 and 7 are like the backbone supporting the plasma display, and each extend in the vertical direction. Leg pieces 7a are provided at both upper and lower ends of each frame 7, and these leg pieces 7a are fastened and fixed to the plasma display assembly 2 by fixing means such as fixing screws. Further, a stand mounting portion 7 b to which the connecting shaft portion 8 b of the stand 8 is fitted is provided at the base portion of the lower leg piece 7 a of each frame 7.

  The stand 8 includes a base portion 8a placed on a placement surface such as a floor, and two connecting shaft portions 8b provided on the upper surface of the base portion 8a. The two connecting shaft portions 8b are arranged side by side in the horizontal direction with an interval substantially equal to the interval between the two frames 7 and 7, and protrude upward. The two connecting shaft portions 8b are fitted into the stand mounting portions 7b and 7b of the two frames 7 and 7 by being inserted from below. As a result, the plasma display television 1 is supported at a predetermined height by the stand 8 in a state where the plasma display is set substantially vertically with the front facing.

  However, in the plasma display device as shown in FIG. 12, two rectangular holes 9, 9 through which the two connecting shaft portions 8 b of the stand 8 pass are provided on the lower surface of the shield cover 5. 9, the stand mounting portions 7 b of the two frames 7 and 7 are opposed to each other, and the two connecting shaft portions 8 b are fitted into the two stand mounting portions 7 b through the square holes 9. It was. Therefore, in order to remove the shield cover 5 from the plasma display assembly 2, the shield cover 5 cannot be removed unless the stand 8 is always removed. As described above, in the plasma display device according to the prior art, since the assembly order occurs between the shield cover 5 and the stand 8, workability at the time of assembly and disassembly is significantly impaired, and workability is poor. There was a problem.

  As a countermeasure against such a problem, for example, a solution can be achieved by making the square hole 9 of the shield cover 5 into a long hole and opening a part thereof at the side edge. That is, as a structure in which a square hole closed on all four sides is greatly opened so that one side thereof reaches the side edge, the connecting shaft portion 8b is pulled out from the opening, and the stand 8 remains attached. Also, the shield cover 5 can be removed. Thus, the shield cover 5 can be attached to and detached from the plasma display assembly 2 regardless of whether or not the stand 8 is assembled to the plasma display assembly 2. Can be planned.

  However, if the gap generated between the opening of the shield cover 5 and the stand mounting portion 7b of the frame 7 becomes large, the sealing property of the electromagnetic shield is impaired, and electromagnetic leakage occurs. FIG. 13 is a view showing gaps 11 </ b> A and 11 </ b> B generated between the opening 10 of the shield cover 5 and the stand mounting portion 7 b of the frame 7. The sizes of the gaps 11A and 11B are represented by the slit lengths L1 and L2 in the diagonal direction of the slit-shaped openings. It is known that as the slit lengths L1 and L2 are shorter, the hermeticity of the electromagnetic shield is improved, and leakage of electromagnetic waves can be suppressed.

  However, the slit lengths L1 and L2 greatly depend on the cutout shape of the shield cover 5 and may inevitably be increased. For example, from the standpoint of the design concept, the stand is not supported by the center of gravity of the plasma display TV 1, but is placed at a position deviated from the center of gravity to the back side. This is the case where a component such as a board is to be placed below. In these cases, the greater the amount of deviation toward the back side of the frame, the greater the cutout shape of the shield cover, and the sealing of the electromagnetic shield cannot be maintained. As a result, the electromagnetic wave leaks from the cutout of the shield cover to the outside, and there is a problem that it is necessary to limit the frame position in order to prevent the leakage of the electromagnetic wave.

  The problem to be solved is that in the conventional plasma display device, if the amount of deviation of the frame toward the back side is increased, the cutout shape of the shield cover increases, so that the sealing property of the electromagnetic shield cannot be maintained, and the electromagnetic wave Leaks from the cutout of the shield cover, so that it is necessary to limit the frame position in order to prevent leakage of the electromagnetic waves.

  The plasma display apparatus of the present invention includes a plasma display assembly having a plasma display that emits electromagnetic waves, and a connecting shaft portion of a stand that is fixed to the plasma display assembly and supports the plasma display assembly. A frame, and a shield cover that shields electromagnetic waves radiated to the back surface and the side surface by covering a portion extending from the back surface to the side surface of the plasma display assembly, and the shield cover includes a frame on which the connecting shaft portion is mounted. A notch that opens to the part facing the stand mounting part and reaches the side edge of the shield cover is formed, and a conductive shielding bracket is provided to cover at least part of the gap formed by the notch and the frame. , Its shielding bracket, plasma display assembly and sheet The most important feature that is electrically connected to at least one of the compartment cover.

  According to the plasma display device of the present invention, the cutout shape of the shield cover is enlarged and opened to the side edge, and at least a part of the gap formed by the cutout and the frame is covered with the conductive shielding bracket. Because it is configured, the shield cover can be attached and removed while the stand is attached to the plasma display assembly, and workability during assembly and disassembly can be improved, and the shield cover etc. Without complicating the shape and structure, the leakage of electromagnetic waves can be reliably prevented or effectively suppressed.

  A plasma display device that can effectively prevent or suppress the leakage of electromagnetic waves without being restricted by the frame position determined by the design concept, compact design, etc., and does not impair the workability of assembly, etc. Realized by configuration.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIGS. 1-11 demonstrates the example of embodiment of this invention. 1 is an exploded perspective view of the first embodiment of the plasma display apparatus according to the present invention as seen from the back side, and FIG. 2 is a perspective view showing two frames and a stand fixed to the plasma display assembly. 3 is a rear view, FIG. 4 is a perspective view of the plasma display device as viewed from the front side, FIG. 5 is a plan view, FIG. 6 is a right side view, and FIG. 7 is a perspective view of the plasma display assembly. 8 is a perspective view showing the main part of the plasma display assembly, FIG. 9 is a front view of the same, FIG. 10 is an explanatory view showing a state in which the connecting shaft portion of the stand is inserted into the stand mounting portion of the frame, and FIGS. 6 is a graph showing a comparison of electromagnetic wave interference levels of the plasma display device of the present invention and the plasma display device of the present invention.

  As shown in FIGS. 1-11, the apparatus shown as a 1st Example of the plasma display apparatus of this invention is a plasma display television. The plasma display television 20 displays an image as a television receiver, and is a so-called thin image display device. However, the plasma display device is not limited to the plasma display television 20, and may of course be a device capable of displaying a video image or the like based on an external input. is there.

  The plasma display television 20 includes a plasma display assembly 22, a filter glass 23 and a front cover 24 attached to the front side of the plasma display assembly 22, a shield cover 25 attached to the back side of the plasma display assembly 22, and A rear cover 26 and the like are provided. The plasma display assemblies 22 and the like are integrally configured by being overlapped with each other in the front-rear direction and detachably tightened and fixed by fixing means such as fixing screws in the overlapped state.

  The plasma display assembly 22 includes a plasma display which is a light emitting device, a drive circuit having a power supply substrate and other circuit boards, and the like, and the drive circuit is assembled on the back side of the plasma display and is integrally configured. Since a plasma display may emit radioactive electromagnetic waves (electromagnetic interference) due to its light emission principle, it is electromagnetically shielded with a shield cover or the like so as not to leak outside.

  The plasma display of the plasma display assembly 22 has a horizontally long rectangle, and a filter glass 23 having substantially the same size and shape is disposed on the front surface thereof. The filter glass 23 is provided with a conductive electromagnetic shield part on its inner surface. This electromagnetic shield part shields the electromagnetic wave radiated | emitted from a plasma display or a drive circuit, and prevents that unnecessary electromagnetic wave leaks to the outer surface side. As the electromagnetic shield part, for example, a transparent conductive film or a metal mesh member can be used. The periphery of the front side of the filter glass 23 is surrounded by a front cover 24 that forms a rectangular frame as a whole. The material of the front cover 24 may be, for example, engineering plastic having an appropriate strength, or may be a metal such as an aluminum alloy.

  2 and 3, the driving circuit of the plasma display assembly 22 includes a first power supply board 31 and a second power supply board 32, a tuner and video circuit board 33, a panel drive circuit board 34, It comprises a digital circuit board 35, a filter circuit board 36, and the like. On these power supply board and circuit board, necessary electronic components (a microcomputer, a semiconductor element, a capacitor, a resistor, etc.) are mounted, and a predetermined electric circuit is configured. Then, it can be electrically connected to an external device via the input / output unit 37.

  Further, two frames 27, 27 are fixed to the back surface of the plasma display assembly 22. The two frames 27, 27 are like a backbone for supporting the plasma display, and are arranged side by side with a predetermined interval in the left-right direction. Leg pieces 27 a and 27 b for fixing to the plasma display assembly 22 are provided at both ends of each frame 27 in the longitudinal direction. The two frames 27 and 27 extend in the vertical direction, the upper leg piece 27a is fixed to the upper part of the plasma display assembly 22 by fixing means such as a fixing screw, and similarly the lower leg piece 27b is fixed to the plasma display assembly. It is similarly fixed to the lower part of 22 by fixing means, such as a fixing screw.

  By the two frames 27, 27, the back surface of the plasma display assembly 22 is divided into three regions 38A to 38C. Among the three areas 38A to 38C, the first power supply board 31, the tuner, and the video circuit board 33 are arranged in order from the top in the first area 38A located at the center, and the input / output unit 37 is arranged below the first power supply board 31. Has been. Among the three regions 38A to 38C, the panel drive circuit 34 is arranged in the second region 38B located on the left side, and the second power supply substrate is arranged in the third region 38C located on the right side in order from the top. 32, a digital circuit board 35 and a filter circuit board 36 are arranged.

  The two frames 27 and 27 are the same, and are configured as a hollow prism having a substantially square cross-sectional shape as a whole. A stand mounting portion 41 is provided at the base portion of the lower leg piece 27 b of each frame 27. The stand mounting portion 41 has a rectangular cross-sectional shape, and the connecting shaft portion 28b of the stand 28 is detachably fitted thereto. As shown in FIGS. 8 to 10, the lower end portion of the stand mounting portion 41 is opened downward, and the connecting shaft portion 46 b is guided on the four sides surrounding the opening portion 42 to facilitate the insertion thereof. Guide pieces 43a, 43b, 43c, and 43d are provided.

  Furthermore, two stoppers 44a and 44b are provided on the rear side surface of the stand mounting portion 41 to support a shielding bracket (to be described later) and prevent its falling. The two stoppers 44a and 44b are disposed symmetrically on the left and right sides. This is based on the fact that one frame 27 also serves as the left and right frames, and the stoppers 44a and 44b used differ depending on whether they are arranged on the right side or the left side. The two frames 27 and 27 are formed of a metal material having a high strength such as a steel material so that a sufficiently high strength can be exhibited.

  The stand 28 includes a base member 45 placed on a placement surface such as a floor, and leg members 46 provided on the upper surface of the base member 45 so as to be rotatable in the horizontal direction. A rotating bearing portion 45a for rotatably supporting the central portion of the leg member 46 is provided at a substantially central portion of the upper surface of the base member 45. The leg member 46 includes an arm portion 46a extending in the horizontal direction, two connecting shaft portions 46b and 46b provided so as to protrude upward at both ends in the longitudinal direction of the arm portion 46a, and the arm portion 46a. The rotation shaft portion 46c is provided so as to protrude downward in the middle portion in the longitudinal direction, and the rotation shaft portion 46c is rotatably held by the rotation bearing portion 45a.

  The two connecting shaft portions 46b, 46b are arranged side by side in the horizontal direction with an interval substantially equal to the interval between the two frames 27, 27. By fitting these two connecting shaft portions 46b, 46b to the respective stand mounting portions 41, 41 of the two frames 27, 27 from below, the plasma display TV 20 is substantially vertical with the plasma display facing the front. The stand 28 is supported at a predetermined height by the stand 28.

  The shield cover 25 is composed of a housing that is open on a single surface that can cover a portion extending from the back surface to the side surface of the plasma display assembly 22, and includes a back surface portion 25a, an upper surface portion 25b, a lower surface portion 25c, left and right side surface portions 25d, 25e. The material of the shield cover 25 is preferably a metal such as an aluminum alloy or iron excellent in conductivity, but may be an engineering plastic having conductivity. Although not shown in the drawings, the surface of the shield cover 25 other than the lower surface portion 25c is provided with a necessary number of holes and notches that do not cause leakage of electromagnetic waves, but there is a risk of leakage of electromagnetic waves. There are no holes or notches of a certain size. On the other hand, two large notches 51A and 51B are provided on the lower surface portion 25c of the shield cover 25.

  The two notches 51A and 51B are provided at positions corresponding to the stand mounting portions 41 of the two frames 27 and 27 fixed to the plasma display assembly 22. The two notches 51A and 51B extend from the vicinity of the back surface portion 25a of the shield cover 25 to the opening side, and are continuously opened to reach the side edge of the opening portion. The stand mounting portions 41 of the two frames 27 and 27 are inserted into the notches 51A and 51B, respectively, and as shown in FIGS. 8 and 10, the lower ends of the stand mounting portions 41 are slightly opened from the notches 51A and 51B. Protruding.

  As a result, as shown in FIG. 9, large gaps 52 formed mainly on the left and right sides of the frame 27 are formed between the cutouts 51 </ b> A and 51 </ b> B of the shield cover 25 and the frame 27. These gaps 52A and 52B are formed by increasing the thickness (height) of the plasma display assembly 22, and the side close to the plasma display is closed by the lower leg piece 27b of the frame 27. However, a considerable gap is still left on both sides of the lower leg piece 27b. Therefore, a part of the gap is closed with the shielding bracket 55.

  The shielding bracket 55 has a configuration as shown in FIGS. That is, the shielding bracket 55 includes a shielding portion 55a formed in a substantially L shape that covers the outer sides of the two sides of the stand mounting portion 41, a mounting portion 55b continuous to the lower portion of the shielding portion 55a, and a shielding portion 55a. A hook portion 55c continuous to the upper portion is provided. As a material of the shielding bracket 55, since a certain degree of strength is required in addition to conductivity, for example, steel having high strength and rigidity is preferable among metals.

  The shielding portion 55a of the shielding bracket 55 includes a portion of the notch 51A (or 51B) provided in the shield cover 25 from the lower surface of the stand mounting portion 41 to the opening end of the notch 51A (or 51B), The size is such that it can be sufficiently covered from one side surface of the stand mounting portion 41 to a portion that sufficiently overlaps the shield cover 25. And the rib part 55d for reinforcement for raising intensity | strength and preventing or suppressing a bending deformation is provided in the side part of the shielding part 55a.

  The mounting portion 55b of the shielding bracket 55 is formed by bending a continuous portion below the shielding portion 55a at 90 degrees. The attachment portion 55b is provided with a plurality of positioning holes 56 for positioning and a plurality of attachment holes 57 through which the shaft portion of the fixing screw is inserted. The hook portion 55c of the shielding bracket 55 is provided so as to protrude in the horizontal direction at the upper end of the shielding portion 55a. By engaging the hook portion 55c with the stopper 44a (or 44b) of the frame 27, an external force applied to the distal end side of the free end of the shielding portion 55a is transmitted to the stopper 44a (or 44b), and the shielding portion 55a Prevents or suppresses overturning.

  By using the shielding bracket 55 having such a configuration, as shown in FIG. 9, the large gap 52 formed between the notches 51A and 51B of the shield cover 25 and the frame 27 is shown by cross hatching. By shielding the part, two large shielding regions 58A and 58B can be set. Thereby, the magnitude | size of the clearance gap 52 can be made small, the leakage of the electromagnetic wave which leaks outside from the clearance gap 52 can be prevented, or the leakage amount can be suppressed to a very small quantity.

  11A and 11B are graphs showing the results of an experimental example in which the EMI (electromagnetic interference) of electromagnetic waves leaking from the gap is compared. In the figure, the horizontal axis represents frequency [MHz] and the vertical axis represents electromagnetic wave level [dB (μV / m)]. FIG. 11A shows an experimental result with a large gap 52 opened without using the shielding bracket 55, and FIG. 11B shows a state in which a part of the gap 52 is shielded using the shielding bracket 55. The experimental results are shown. In FIGS. 11A and 11B, the part indicated by the symbol X indicates a region where the frequency is 180 MHz to 230 MHz. As is clear from the figure, in the frequency range of 180 MHz to 230 MHz, the present invention can improve the prevention of electromagnetic wave leakage of 5 to 10 dB.

  Further, as shown in FIG. 1, the rear cover 26 is a protective member having a decorative property that can cover substantially the entire portion from the back surface to the side surface of the plasma display assembly 22 including the shield cover 25. As a material of the rear cover 26, for example, an engineering plastic having an appropriate strength excellent in insulation is suitable.

  The plasma display television 20 having such a configuration can be easily assembled or disassembled as follows, for example. For example, at the time of assembly, the stand 28 may be attached to the plasma display assembly 22 assembled in advance, or the shield cover 25 may be attached before the stand 28 is attached. This is because the shield cover 25 is provided with the cutouts 51A and 51B. That is, by providing the shield cover 25 with the cutouts 51A and 51B, the assembly order is eliminated between the shield cover 25 and the stand 28, so that whichever is assembled first can be assembled later. Because it became.

  From this, the following effects can also be obtained. That is, in the case of a conventional apparatus in which the assembly order of the shield cover and the stand is determined, the shield cover must be removed first, and then the stand is removed. It was done in a standing state, and the posture during work was uniquely determined. On the other hand, in the case of the present invention, the assembly order of the shield cover 25 and the stand 28 is free, and either can be assembled first, so that the work can be performed with the plasma display TV 20 standing. In addition, the assembly / disassembly operation can be performed in a state in which it can be laid down. Therefore, the work can be performed in the posture / state desired by the worker, and workability can be improved.

  For example, first, the stand 28 is placed at a predetermined position, and the plasma display assembly 22 is assembled thereto. This is because the two stand mounting portions 41 and 41 of the two frames 27 and 27 fixed to the plasma display assembly 22 are mounted on the two connecting shaft portions 46 b and 46 b protruding from the upper surface of the stand 28. . Thereafter, the filter glass 23 and the front cover 24 are attached, and further, the shield cover 25 and the rear cover 26 are attached. Thereby, the assembly work of the plasma display television 20 is completed, and the plasma display television 20 having the configuration as shown in FIGS. 4 to 6 is obtained.

  Thus, according to the present invention, the assembly order of the shield cover 25 and the stand 28 is free, and either can be assembled first, so that the assemblability can be greatly improved. In addition, the work can be performed with the plasma display TV 20 standing, and the assembly / disassembly work can be performed with the plasma display TV 20 lying on its side. And workability can be improved.

  Further, after the shield cover 25 is attached to the plasma display assembly 22, the two shielding brackets 55 are attached so as to cover part of the two notches 51 </ b> A and 51 </ b> B provided in the shield cover 25. The attaching operation of the shielding bracket 55 is performed as follows, for example. As shown in FIG. 8 and the like, first, the hook portion 55 c of the shielding bracket 55 is engaged with the stopper 44 a (or 44 b) provided on the stand mounting portion 41 of the frame 27. Next, the attachment portion 55 b is overlapped with the attachment position of the plasma display assembly 22 so as to cover the gap 52 with the shielding portion 55 a. At this time, after positioning with the positioning pin 61 provided at the mounting position, the shielding bracket 55 is fastened and fixed at a predetermined position by using fixing means such as a fixing screw.

  In this case, the shielding bracket 55 is brought into conduction by directly contacting the shielding cover 25 and the conductive portion of the plasma display assembly 22. At this time, conductive performance may be improved by interposing a conductive packing, gasket, or the like between the shielding bracket 55 and the shield cover 25 or the conductive portion of the plasma display assembly 22. Further, since the hooking portion 55c is provided in the shielding bracket 55 and the hook portion 55c is engaged with the stopper 44a (or 44b) of the frame 27, a part of the additional portion provided to the shielding bracket 55 is provided. Can be borne by the stand 28. As a result, the addition applied to the shielding bracket 55 can be reduced, and the bending deformation of the shielding bracket 55 can be prevented or effectively suppressed. Needless to say, such an improvement in workability during assembly can be obtained in the same way during disassembly work.

  According to the plasma display television 20 of the present invention having such a configuration, the gaps 52, 52 formed between the notches 51A, 51B of the shield cover 25 and the connecting shaft portions 46b, 46b of the stand 28 are shield brackets. Therefore, it is possible to prevent or effectively suppress electromagnetic waves from leaking to the outside through the gap.

  As described above, according to the plasma display device of the present invention, the cutout shape of the shield cover can be increased and simplified by using the shielding bracket, and is not affected by the design of the stand position or the like. Thus, an electromagnetic shielding structure excellent in assemblability can be obtained. In addition, the leakage of electromagnetic waves can be effectively prevented or suppressed without being restricted by the frame position due to the design concept or the compact design. Furthermore, it is possible to provide a plasma display device having a simple shield structure and a high shielding effect without complicating the shape and structure of the shield cover.

  The present invention is not limited to the embodiment described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention. For example, in the above-described embodiment, an example in which a plasma display television is applied as a plasma display device has been described. However, the present invention can be applied to various devices using a plasma display monitor and other plasma displays.

It is the disassembled perspective view which looked at the plasma display television which shows the 1st Example of the plasma display apparatus of this invention from the back side. It is the perspective view which looked at the plasma display assembly and stand of the plasma display apparatus shown in FIG. 1 from the back side. It is explanatory drawing which looked at the plasma display assembly and stand of the plasma display apparatus shown in FIG. 1 from the back side. It is the perspective view which looked at the plasma display television which shows the 1st Example of the plasma display apparatus of this invention from the front side. It is a top view of the plasma display television shown in FIG. It is a right view of the plasma display television shown in FIG. It is the perspective view which looked at the plasma display assembly and shield cover of the plasma display apparatus shown in FIG. 1 from the back side. It is explanatory drawing which expanded the principal part of FIG. 7 and was seen from the diagonal. It is explanatory drawing which expanded the principal part of FIG. 7 and was seen from the front. It is explanatory drawing which shows the state which inserts the connecting shaft part of a stand in the stand mounting part of the flame | frame of the plasma display apparatus shown in FIG. The electromagnetic wave interference levels of the conventional plasma display device and the plasma display device of the present invention are shown in comparison. FIG. A is a graph of a conventional example, and FIG. B is a graph of the present invention. It is the disassembled perspective view which looked at the conventional plasma display apparatus from the back side. It is explanatory drawing which shows the relationship between the notch shape of the shield cover of the conventional plasma display apparatus, and a flame | frame.

Explanation of symbols

20 ... Plasma display television (plasma display device), 22 ... Plasma display assembly, 23 ... Filter glass, 24 ... Front cover, 25 ... Shield cover, 26 ... Rear cover, 27 ... Frame, 27a, 27b ... Leg piece, 28 ... Stand, 41 ... Stand mounting part, 46b ... Connecting shaft part, 51A, 51B ... Notch, 52 ... Clearance, 55 ... Shielding bracket, 55a ... Shielding part, 55b ... Mounting part, 55c ... Hook part

Claims (3)

A plasma display assembly having a plasma display that emits electromagnetic waves;
A frame fixed to the plasma display assembly and mounted with a connecting shaft portion of a stand to support the plasma display assembly;
A shield cover that shields the electromagnetic waves radiated to the back surface and the side surface by covering a portion extending from the back surface to the side surface of the plasma display assembly,
The shield cover is formed with a notch that opens to a portion facing the stand mounting portion of the frame on which the connecting shaft portion is mounted and reaches a side edge of the shield cover.
Provide a conductive shielding bracket that covers at least part of the gap formed by the notch and the frame;
A plasma display device, wherein the shielding bracket is electrically connected to at least one of the plasma display assembly and the shield cover.   2. The plasma display apparatus according to claim 1, wherein the shielding bracket has an L-shaped shielding portion that covers the outside of two adjacent sides of the frame. The plasma display apparatus according to claim 1, wherein the shielding bracket is provided with a hook portion, and a stopper with which the hook portion is engaged is provided on the frame.

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