JP2009080295A - Display and filter for display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display capable of stably achieving an electromagnetic wave shielding function with simple constitution. <P>SOLUTION: The display 10 includes: an image display part 20; an electromagnetic wave shielding sheet 30 arranged on an observer side of the image display part and having a sheet type base material 32 and a conductive layer 34 supported on the base material; a conductor for grounding 42 arranged to be opposed to the edge part of the conductive layer of the electromagnetic wave shielding sheet; and a member for conduction 50 arranged between the conductive layer of the electromagnetic wave shielding sheet and the conductor for grounding. The conductor for grounding is grounded when the display is used. The member for conduction has cloth material 52 that is cloth material including a conductive fiber, and coming into contact with the conductive layer and the conductor for grounding, and an elastic member 54 surrounded at least partially by the cloth material. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a display including an electromagnetic wave shielding sheet, and more particularly, to a display that can stably exhibit an electromagnetic wave shielding function with a simple configuration.

  The present invention relates to a display filter including an electromagnetic wave shielding sheet, and more particularly to a display filter that can be easily incorporated into a display and can stably exhibit an electromagnetic wave shielding function.

  A display having an image display unit such as a plasma display panel (hereinafter also simply referred to as “PDP”) or a cathode ray tube (also referred to as a CRT) is widely used. In these displays, a plurality of sheet materials each having various functions are arranged on the viewer side (front side) of the image display unit.

As an example of the sheet material arranged on the front side of the PDP or CRT, there is an electromagnetic wave shielding sheet (for example, Patent Document 1 and Patent Document 2). The electromagnetic wave shielding sheet is a sheet material for shielding unnecessary electromagnetic waves radiated from the image display unit. In a widely spread form, the electromagnetic wave shielding sheet has a transparent base material and a conductive layer made of a mesh pattern formed on one surface of the base material. The conductive layer comes into contact with a grounding conductor such as a grounded frame, so that the electromagnetic wave shielding sheet can exhibit an electromagnetic wave shielding function. Therefore, it is important to stably secure a state where the conductive layer of the electromagnetic wave shielding sheet and the grounding conductor are conducted with a low resistance value.
Japanese Patent Laid-Open No. 9-148781 JP 2007-148275 A

  According to the method disclosed in Patent Document 1, the plate-shaped grounding conductor fixed to the frame is brought into surface contact with the conductive layer of the electromagnetic wave shielding sheet, whereby the conductive layer of the electromagnetic wave shielding sheet, the grounding conductor, Ensuring continuity. However, warping, bending, or the like occurs in a very thin sheet material such as an electromagnetic wave shielding sheet based on vibrations on the display, changes in environmental conditions around the display, and the like. In this case, the contact between the grounding conductor made of a rigid body and the conductive layer of the deformed sheet-shaped electromagnetic shielding sheet becomes a line contact or a point contact, and the resistance value between the grounding conductor and the conductive layer of the electromagnetic shielding sheet is As a result, the electromagnetic wave shielding performance of the electromagnetic wave shielding sheet decreases. Furthermore, the grounding conductor and the conductive layer of the electromagnetic wave shielding sheet are not in contact with each other, and unnecessary electromagnetic waves may even leak from between the grounding conductor and the conductive layer of the electromagnetic wave shielding sheet.

  On the other hand, the display disclosed in Patent Document 2 is provided with a clip-shaped grounding conductor. The grounding conductor is in contact with and in conduction with the grounding conductor by sandwiching the electromagnetic wave shielding sheet. Further, by fixing the grounding conductor to the frame, the image display unit is fixed between the grounding conductor and the frame. According to this grounding conductor, the conduction state between the grounding conductor and the electromagnetic wave shielding sheet can be stabilized. However, it is troublesome to attach the grounding conductor so as to sandwich the electromagnetic wave shielding sheet. Further, in today's large-sized image display unit, it is very complicated to fix the grounding conductor sandwiching the electromagnetic wave shielding sheet to the frame while positioning the electromagnetic wave shielding sheet and the image display unit. In addition, since the electromagnetic wave shielding sheet is a thin flexible sheet, the electromagnetic wave shielding sheet may be bent and deformed or damaged when it is sandwiched between clips.

  The present invention has been made in consideration of such points, and an object thereof is to provide a display that can stably exhibit an electromagnetic wave shielding function with a simple configuration. It is another object of the present invention to provide a display filter that can be easily incorporated into a display and can stably exhibit an electromagnetic wave shielding function.

  The display according to the present invention is a display including an image display unit, and is disposed on the viewer side of the image display unit, and has an electromagnetic wave shield having a sheet-like base material and a conductive layer supported by the base material A sheet, a grounding conductor disposed opposite to the edge of the conductive layer of the electromagnetic wave shielding sheet, the grounding conductor to be grounded when the display is used, and the electromagnetic wave shielding sheet. A conductive member disposed between an edge of the conductive layer and the grounding conductor, and electrically connecting the conductive layer and the grounding conductor to each other, the conductive member including the conductive layer and the conductive layer It has the cloth material which has the electroconductivity which contacted the conductor for grounding, and the elastic member at least partially enclosed by the said cloth material, It is characterized by the above-mentioned.

  In the display according to the present invention, the elastic member of the conducting member may be pressed and elastically deformed from the conductive layer of the electromagnetic wave shielding sheet and the grounding conductor.

  In the display according to the present invention, the conducting member may be adhered to at least one of the conductive layer and the grounding conductor of the electromagnetic wave shielding sheet via an adhesive. Good.

  Further, in the display according to the present invention, the conductive layer includes a pattern region in which a conductive material is disposed on the substrate in a desired pattern, the conductive layer adjacent to the conductive pattern region, and the conductive material in a planar shape. A solid region disposed on the substrate, wherein the grounding conductor is disposed to face the solid region of the conductive layer, and the conductive member is in contact with the solid region of the conductive layer. You may make it.

  Furthermore, in the display according to the present invention, the grounding conductor is disposed opposite one or more edges along one or more sides of the conductive layer of the electromagnetic wave shielding sheet having a rectangular shape in plan view, and the conductive A conductive member extending linearly may be provided between the one or more edge portions of the layer and the grounding conductor.

  Further, the grounding conductor may be a part of a frame that supports the image display unit.

  Further, in the display according to the present invention, the grounding that forms a part of the conductive frame that faces the four edges along the four sides of the conductive layer of the electromagnetic wave shielding sheet having a rectangular shape in plan view and that supports the image display unit. And a conductive member extending linearly is provided between each edge of the conductive layer and the grounding conductor, and is formed by the frame and the electromagnetic wave shielding sheet. The image display unit may be arranged in a casing.

  The display filter according to the present invention has a sheet-like base material and a conductive layer supported by the base material, and has a rectangular electromagnetic wave shielding sheet in plan view, and the conductive layer of the electromagnetic wave shielding sheet. A conductive member disposed on the edge and electrically connected to the conductive layer, wherein the conductive member is at least partially surrounded by the conductive cloth material in contact with the conductive layer and the cloth material. And an elastic member.

  In the display filter according to the present invention, the conductive member may be bonded to an edge of the conductive layer of the electromagnetic wave shielding sheet via an adhesive.

  In the display filter according to the present invention, the conductive member is disposed on one or more edges along one or more sides of the conductive layer of the electromagnetic wave shielding sheet having a rectangular shape in plan view. You may do it.

  Furthermore, in the filter for display according to the present invention, the conductive layer includes a pattern region in which a conductive material is arranged in a desired pattern on the substrate, and a conductive material adjacent to the conductive pattern region. The conductive member may be disposed on the solid region of the conductive layer.

  According to the present invention, the elastic member of the conducting member can be elastically deformed following the movement or deformation of the electromagnetic wave shielding sheet. Further, the electromagnetic wave shielding sheet can be easily incorporated into the display without deformation or damage. Therefore, the conduction state between the grounding conductor and the conductive layer of the electromagnetic wave shielding sheet can be stably secured with a simple configuration. As a result, the electromagnetic wave shielding function of the electromagnetic wave shielding sheet can be stabilized.

BEST MODE FOR CARRYING OUT THE INVENTION

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings attached to the present specification, for the sake of illustration and ease of understanding, the dimensional ratios such as scale and vertical and horizontal are appropriately changed from those of the actual product.

  The embodiments described below are examples in which the present invention is applied to a plasma display. However, the present invention is not limited to this, and the present invention can be widely applied to various displays (image display devices) such as a display using a CRT.

  1 to 4 are diagrams for explaining an embodiment of a display and a display filter according to the present invention. 1 is a side view showing a schematic configuration of the display, FIG. 2 is a partially enlarged view of a grounding portion of the electromagnetic wave shielding sheet of FIG. 1, and FIG. 3 is a plan view showing a display filter. 4 is a sectional view taken along line IV-IV in FIG.

  As shown in FIGS. 1 and 2, the display (image display device) 10 is opposed to the image display unit 20, the electromagnetic wave shielding sheet 30 disposed on the viewer side of the image display unit 20, and the electromagnetic wave shielding sheet 30. And a conductive member 50 disposed between the electromagnetic wave shielding sheet 30 and the grounding conductor 42. The electromagnetic wave shielding sheet 30 includes a sheet-like base material 32 and a conductive layer 34 supported by the base material 32. The conduction member 50 conducts (electrically connects) the conductive layer 34 of the electromagnetic wave shielding sheet 30 and the grounding conductor 42 to each other. The display filter 15 includes an electromagnetic wave shielding sheet 30 and a conduction member 50 among them.

  In the display 10, an image formed by the image display unit 20 can be observed from the observer side. In addition, the image display unit 20 emits electromagnetic waves together with image light forming an image. However, the electromagnetic wave shielding sheet 30 captures the electromagnetic waves and prevents the electromagnetic waves from leaking from the display. The “electromagnetic wave” referred to here is not an electromagnetic wave in a broad sense, but means one having a frequency band of about MHz to GHz or less, and used separately from infrared rays, visible rays, and ultraviolet rays.

  Hereafter, each component which comprises the display 10 is explained in full detail.

  First, the image display unit 20 will be described. As described above, in the present embodiment, the display 10 is configured as a plasma display. And in this Embodiment, the image display part 20 consists of what is called a plasma display panel (PDP). The PDP 20 has two glass substrates arranged with a gap therebetween, and a large number of discharge cells corresponding to the respective pixels of the plasma display are formed between the glass substrates. Each discharge cell is filled with a rare gas such as helium, neon, argon, or xenon, and the inner wall of each discharge cell is coated with a phosphor. Further, a voltage can be applied to each discharge cell. In the discharge cell to which a voltage is applied, plasma discharge occurs and ultraviolet rays are generated. The generated ultraviolet light hits the phosphor in the discharge cell, so that visible light is emitted from the discharge cell. In this way, by controlling the emission of visible light from each discharge cell, the PDP 20 can display a desired image.

  Next, the electromagnetic wave shielding sheet 30 will be described. As described above and as can be seen from FIG. 2, the electromagnetic wave shielding sheet 30 includes a sheet-like base material 32 and a conductive layer 34 supported by the base material 32. The electromagnetic wave shielding sheet 22 functions as a member that shields electromagnetic waves in the MHz to GHz band, for example, emitted from the image display unit 20 and transmits visible light.

  As shown in FIG. 2, in the present embodiment, the electromagnetic wave shielding sheet 30 constitutes a part of the composite filter material 25 disposed on the observer side of the image display unit (PDP) 20. Accordingly, since the observer observes the image light from the image display unit 20 through the composite filter material 25, the composite filter material 25 including the electromagnetic wave shielding sheet 30 needs to have transparency.

  In the example shown in FIG. 2, the composite filter material 25 includes a glass substrate 26 that supports the electromagnetic wave shielding sheet 30 through an adhesive layer 27, and an antireflection layer that is laminated on the glass substrate 26 on the side opposite to the electromagnetic wave shielding sheet 30. A sheet (AR sheet) 28. The antireflection sheet 28 is a sheet for preventing reflection of external light, and is disposed on the observer side most of the composite filter material 25. That is, the electromagnetic wave shielding sheet 30 is disposed closest to the image display unit 20 in the composite filter material 25 (see FIG. 2).

  The base material 32 of the electromagnetic wave shielding sheet 30 can be appropriately configured so as to have appropriate strength and appropriate transparency. The thickness of the base material 32 generally used is 20 μm to 200 μm, and the light transmittance is 80% or more. As such a base material 32, for example, a biaxially stretched polyethylene terephthalate (PET) film can be used. The biaxially stretched polyethylene terephthalate film is suitable for application as the substrate 32 in that it has appropriate transparency and durability against ultraviolet irradiation treatment, heat treatment, and the like.

  As shown in FIGS. 2 and 3, in the present embodiment, the conductive layer 34 of the electromagnetic wave shielding sheet 30 includes a pattern region 36 in which the conductive material is arranged on the base material 32 in a desired pattern, and the conductive material. Includes a solid region 38 (the opening is a layer made of a non-formed conductor) disposed on the base material 32 in a planar shape. As shown in FIG. 2, the electromagnetic wave shielding sheet 30 and the conductive layer 34 have a rectangular shape in plan view. Among these, the pattern region 36 is disposed at the center, and the solid region 38 is disposed adjacent to the pattern region 36 at the peripheral edge thereof, and is electrically connected (electrically connected) to the pattern region 36. In particular, in the present embodiment, the solid region 38 extends along the four sides of the conductive layer 34 to surround the pattern region 36, and forms a peripheral edge of the conductive layer 34. Here, the plan view refers to a visual field observed when observed from a direction along the normal line of the sheet-like electromagnetic wave shielding sheet 30.

  As shown in FIGS. 2 and 4, the pattern region 36 is constituted by a conductive line portion 36 a protruding from the surface of the base material 32 on the image display portion 20 side. The line portions 36a are arranged on the substrate 32 in a predetermined pattern such as a mesh shape (see FIG. 3) or a stripe shape. In consideration of ensuring transparency in the pattern region 36 through which the image light from the image display unit 20 passes, the width of the line portion 36a is set to about 5 to 30 μm, and the arrangement pitch of the line portions 36a is set to about 100 to 500 μm. can do. Further, as will be described later, the pattern region 36 is grounded via the frame 40 (grounding conductor 42), the conductive member 50, and the solid region 36 of the conductive layer 34, thereby exhibiting an electromagnetic wave shielding function. Will be able to.

  The pattern region 36 and the solid region 38 of the conductive layer 34 are formed by, for example, laminating a conductive foil made of metal or the like on the base material 32 and etching the foil in a desired pattern, or the base material 32. The conductive ink can be formed on the substrate 32 by a conventionally known method such as a method of printing a conductive ink in a desired pattern.

  Next, the frame 40 will be described. The frame 40 is made of a conductive material (for example, stainless steel or aluminum). As shown in FIGS. 1 and 2, the frame 40 has a box shape formed with an opening 40 a. As shown in FIG. 1, the image display unit 20 is accommodated in a frame 40 and supported by the frame 40 via a fixture 46. The video light from the image display unit 20 passes through the opening 40a of the frame 40 and proceeds to the viewer side.

  As described above, the frame 40 includes the grounding conductor 42 disposed to face the electromagnetic wave shielding sheet 30. That is, the grounding conductor 42 constitutes a part of the frame 40. The grounding conductor 40 is grounded at least when the display 10 is used by a conventionally known method. As a general method, the frame 40 and the grounding conductor 42 forming a part of the frame can be grounded at least when the display 10 is used through a power supply line for securing a power source for driving the display 10. .

  As shown in FIG. 2, the grounding conductor 42 has a flat plate shape and is disposed so as to face the edge of the conductive layer 34 of the electromagnetic wave shielding sheet 30, in this embodiment, the solid region 38 of the conductive layer 34. ing. As described above, in the present embodiment, the electromagnetic wave shielding sheet 30 and the conductive layer 34 have a rectangular shape in plan view. And, facing the edges of the four areas of the conductive layer 34 along each of the four sides forming the rectangular outer contour, the grounding conductor 42 extending circumferentially, or a plurality of grounding conductors 42 extending linearly, Alternatively, four grounding conductors 42 extending linearly are provided.

  As shown in FIGS. 1 and 2, an outer frame 44 is attached to the vicinity of the opening 40 a of the frame 40 via a fixture 45. The composite filter material 25 including the electromagnetic wave shielding sheet 30 is supported by the frame 40 such that the edge thereof is positioned between the outer frame 44 and the grounding conductor 42.

  Next, the conduction member 50 will be described. As shown in FIGS. 2 and 4, the conducting member 50 includes a cloth material 52 having conductivity at least on the surface and an elastic member 54 having a large elastic deformation amount. The cloth material 52 at least partially surrounds the elastic member 54 and is supported by the elastic member 54.

  As shown in FIG. 2, the conduction member 50 includes an edge portion of the conductive layer 34 of the electromagnetic wave shielding sheet 30, in this embodiment, a solid region 38 of the conductive layer 34 of the electromagnetic wave shielding sheet 30, and a grounding of the frame 40. It is arrange | positioned between the conductors 42 for use. As described above, in the present embodiment, the electromagnetic wave shielding sheet 30 and the conductive layer 34 have a rectangular shape in plan view. Then, the conductive member 50 that extends in a circumferential shape, or a plurality of conductive members 50 that extend in a line, or straight lines are opposed to the edges of the four areas of the conductive layer 34 along the four sides that form the rectangular outer contour. A conductive member 50 (see FIG. 3) extending in a shape is provided.

  As shown in FIGS. 2 and 4, the elastic member 54 of the conducting member 50 has a substantially elliptical shape in a cross section orthogonal to the longitudinal direction of the conducting member 50, and is surrounded by a cloth material 52. Yes. The elastic member 54 can be greatly elastically deformed. When the elastic member 54 is disposed between the electromagnetic wave shielding sheet 30 and the grounding conductor 42, the elastic material 54 causes the cloth material 52 to be transferred to the conductive layer of the electromagnetic wave shielding sheet 30 by its restoring force. 34 and the grounding conductor 42 can be brought into contact with each other. Such an elastic material 54 is made of, for example, a material having a large elastic deformation amount such as a sponge, or a metal having a large elastic deformation amount depending on its configuration although the material itself does not have a large elastic deformation amount. It can be formed by a spring or the like.

  The cloth material 52 constitutes the outer surface of the conductive member 50 and has flexibility so that it can be deformed along with the deformation of the elastic member 54. The cloth material 52 may be composed of a woven fabric or a non-woven fabric formed to include at least conductive fibers. Here, the conductive fiber refers to a thread-like material having conductivity on at least the outer surface. As such a conductive fiber, a composite fiber material formed by forming a metal coating layer on the outer surface of a resinous core material by vapor deposition or the like, a metal wire, or the like can be employed. Or the cloth material 52 can also be comprised from the cloth material which gives electroconductivity to the surface of a woven fabric or a nonwoven fabric. For example, the cloth material 52 can be formed by vapor-depositing metal on the surface of a woven fabric or a non-woven fabric.

  The cloth material 52 that forms the outer surface of the conductive member 50 is connected to the edge (solid region 38) of the conductive layer 34 and the ground between the conductive layer 34 of the electromagnetic wave shielding sheet 30 and the grounding conductor 42 of the frame 40. Both are in contact with the conductor 42. As a result, the pattern region 36 of the conductive layer 34 of the electromagnetic wave shielding sheet 30 and the grounding conductor 42 are electrically connected to each other through the conductive member 50.

  Further, the edge portion of the conductive layer 34 (solid region 38 in the present embodiment) and the conduction member 50 are disposed between the grounding conductor 42 and the outer frame 44 of the frame 40. Then, by appropriately designing the shape of the outer frame 44, the edge of the conductive layer 34 and the conducting member 50 are pressed between the grounding conductor 42 and the outer frame 44. As a result, the conductive member 50 (see FIG. 2) incorporated in the display 10 is crushed and deformed from the state before being incorporated in the display 10 (see FIG. 4).

  By the way, as shown in FIG. 2, in this embodiment, the conductive member 50 is electrically conductive on the edge of the conductive layer 34 of the electromagnetic wave shielding sheet 30 (solid region 38 in the present embodiment). It is bonded via an adhesive 58. Therefore, when the electromagnetic wave shielding sheet 30 (composite filter material 25) is incorporated into the display 10, there is no need to perform a complicated operation such as positioning the conductive member 50 between the electromagnetic wave shielding sheet 30 and the frame 40. The display filter 15 in the present embodiment is constituted by the electromagnetic wave shielding sheet 30, the conduction member 50, and the adhesive 58.

  Next, the operation of the present embodiment configured as described above will be described.

  As described above, when the conductive member 50 is in contact with the conductive layer 34 and the grounding conductor 42 between the conductive layer 34 of the electromagnetic wave shielding sheet 30 and the grounding conductor 42, the electromagnetic wave shielding sheet conductive layer. 34 and the grounding conductor 42 are electrically connected to each other via the conductive member 50. As a result, at least when the display 10 is used, the conductive layer 34 of the electromagnetic wave shielding sheet 30 is grounded and has an electromagnetic wave shielding function.

  By the way, ambient environmental conditions where the display 10 is installed, such as temperature and humidity, change. In addition, vibration may be applied to the electromagnetic wave shielding sheet 30 of the display 10 from, for example, a speaker. When the environmental condition changes or vibration is applied, the electromagnetic wave shielding sheet 30 (composite filter material 25) warps or moves relative to the frame 40. When the electromagnetic wave shielding sheet 30 moves or deforms in the display 10 as described above, the elastic member 54 that can have a large elastic deformation amount (low Young's modulus) and the flexible cloth material 52 are included. The conduction member 50 deforms following the movement or deformation of the electromagnetic wave shielding sheet 30 without firmly restricting the movement of the electromagnetic wave shielding sheet 30. At this time, the cloth material 52 supported by the elastic member 54 by the restoring force (biasing force) of the elastic member 54 is directed toward the solid region 38 of the conductive layer 34 of the electromagnetic wave shielding sheet 30 and the grounding conductor 42 of the frame 40. And is kept in contact with the solid region 38 of the conductive layer 34 and the grounding conductor 42. That is, with such a simple configuration, a conductive state between the grounding conductor 42 and the conductive layer 34 of the electromagnetic wave shielding sheet 30 can be stably secured. As a result, the electromagnetic wave shielding function of the electromagnetic wave shielding sheet 30 can be extremely stabilized. Moreover, since the electromagnetic wave shielding sheet 30 is not firmly fixed in the periphery thereof, it is possible to prevent the electromagnetic wave shielding sheet 30 from being noticeably wrinkled or warped or damaging the conductive layer or the like.

  The conductive layer 34 has a pattern region 36 in which the conductive material is arranged in a desired pattern on the substrate 32, and is adjacent to the periphery of the pattern region 36, and the conductive material is arranged on the substrate 32 in a planar shape. The conductive member 50 is disposed on the solid region 38 of the conductive layer 34. Therefore, the conductive member and the conductive layer of the electromagnetic wave shielding sheet can be brought into surface contact. As a result, the conductive layer 34 of the electromagnetic wave shielding sheet 30 and the grounding conductor 42 can be conducted with a low resistance value. Thereby, the electromagnetic wave shielding sheet 30 comes to have an excellent electromagnetic wave shielding function.

  Further, between the conductive layer 34 of the electromagnetic wave shielding sheet 30 and the grounding conductor 42, the elastic member 54 of the conducting member 50 is pressed and elastically deformed from the conductive layer 34 of the electromagnetic wave shielding sheet 30 and the grounding conductor 42. It has become a state. Therefore, due to the restoring force of the elastic member 54 of the conductive member 50, the cloth material 52 supported by the elastic member 54 is brought into contact with the conductive layer 34 of the electromagnetic wave shielding sheet 30 and the grounding conductor 42 in the planar region. be able to. That is, the conducting member 50 and the conductive layer 34 of the electromagnetic wave shielding sheet 30 can be brought into surface contact and conducted with a low resistance value. Similarly, the conducting member 50 and the plate-like grounding conductor 42 can be brought into surface contact and conducted with a low resistance value. As a result, the conductive layer 34 of the electromagnetic wave shielding sheet 30 and the grounding conductor 42 can be conducted with a low resistance value. Therefore, the electromagnetic wave shielding sheet 30 has an excellent electromagnetic wave shielding function.

  Further, grounding conductors 42 that form the periphery of the opening 40a of the frame 40 are arranged so as to face the edge portions of the four sections along the four sides of the conductive layer 34 of the electromagnetic wave shielding sheet 30 having a rectangular shape in plan view. Has been. A conductive member 50 extending linearly is provided between the edge of each region of the conductive layer 34 and the grounding conductor 42. For this reason, at the periphery of the conductive layer 34 of the electromagnetic wave shielding sheet 30, the grounding conductor 42 of the frame 40 and the conductive layer 34 of the electromagnetic wave shielding sheet 30 can be conducted through the conducting member 50. As a result, the frame 40 and the electromagnetic wave shielding sheet 30 form a conductive casing that houses the image display unit 20 that serves as an electromagnetic wave radiation source. As described above, even if the conditions of the environment in which the display 10 is installed changes or the display 10 vibrates, the conductive member is connected to the conductive layer 34 of the electromagnetic wave shielding sheet 30 and the frame 40 as described above. It is possible to stably maintain a state in contact with the electric conductor 42 for use. Therefore, it is possible to effectively prevent electromagnetic waves from leaking from the gap between the frame 40 and the electromagnetic wave shielding sheet 30, thereby improving the electromagnetic wave shielding performance of the display 10 as a whole.

  According to the present embodiment as described above, the elastic member 54 of the conduction member 50 can be elastically deformed following the movement or deformation of the electromagnetic wave shielding sheet 30. Therefore, the conductive state between the grounding conductor 42 and the conductive layer 34 of the electromagnetic wave shielding sheet 30 can be stably secured with a simple configuration. Moreover, the electromagnetic wave shielding sheet is not damaged or deformed. As a result, the electromagnetic wave shielding function of the electromagnetic wave shielding sheet 30 can be stably secured.

  Further, according to the present embodiment, the conductive member 50 is bonded to the conductive layer 34 of the electromagnetic wave shielding sheet 30 via the adhesive 58. Therefore, the electromagnetic wave shielding sheet 30 can be easily incorporated into the display 10 without requiring complicated work.

  It should be noted that the amount of the adhesive 58 used is preferably a small amount as long as the expected action can be exhibited. Generally, the conductivity of the conductive adhesive 58 is lower than the conductivity of the metal fiber. Therefore, as shown in FIG. 2, the cloth material 52 of the layer passing member 50 and the conductive layer 34 of the electromagnetic wave shielding sheet 30 are not only in contact via the conductive adhesive 58, but also are in direct contact with each other. It is because it is preferable to have.

  Furthermore, according to the present embodiment, the grounding conductor 42 is a part of the frame 40 that supports the image display unit (PDP) 20. Therefore, the structure of the display 10 is further simplified, and the electromagnetic wave shielding sheet 30 can be more easily incorporated into the display 10.

  As described above, the display filter 15 in the present embodiment includes the electromagnetic wave shielding sheet 30, the conduction member 50, and the adhesive 58. Therefore, according to the display filter 15, the configuration is simple, and no complicated work is required, and the filter 15 can be easily incorporated into the display 10. Further, when the filter 15 is incorporated in the display 10, the electromagnetic wave shielding sheet 30 can be electrically connected to the grounding conductor 42 through the conductive member 50 with a simple configuration. Even if the environmental conditions around the display 10 change or the display 10 vibrates, the electromagnetic shielding sheet 30 moves or deforms in the display 10, the movement or deformation of the electromagnetic shielding sheet 30 follows. The elastic member 54 of the conductive member 50 can be elastically deformed. Therefore, the conductive state between the grounding conductor 42 and the filter 15 can be stably secured with a simple configuration, and as a result, the electromagnetic wave shielding function of the filter 15 can be stabilized.

  Various modifications can be made within the scope of the gist of the present invention with respect to the above-described embodiment. Hereinafter, an example of a modification will be described. 5 to 8 will be referred to in the following description of the modified example. In FIGS. 5 to 8, the same parts as those of the above-described embodiment, or the same modifications may be configured between the modified examples described below. Portions are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the above-described embodiment, the electromagnetic wave shielding sheet 30 is displayed on the display 10 such that the conductive layer 34 of the electromagnetic wave shielding sheet 30 faces the image display unit 20 and the base material 32 of the electromagnetic wave shielding sheet 30 faces the viewer. Although the example arrange | positioned in the inside was shown, it is not restricted to this, You may arrange | position with the electromagnetic wave shielding sheet 30 reversed. That is, as shown in FIG. 5, the electromagnetic wave shielding sheet 30 is placed so that the conductive layer 34 of the electromagnetic wave shielding sheet 30 faces the viewer and the base material 32 of the electromagnetic wave shielding sheet 30 faces the image display unit 20. It can also be arranged in the display 10. In the example illustrated in FIG. 5, the frame 140 includes a frame main body 41 that can be configured substantially the same as the frame 40 in the above-described embodiment, and an auxiliary frame 47 that is fixed to the frame main body 41. The edge of the conductive layer 34 of the electromagnetic wave shielding sheet 30 and the conducting member 50 are held between the grounding conductor 42 that constitutes a part of the frame body 41 and the auxiliary frame 47.

  In the above-described embodiment, the conductive member 50 is disposed between the solid region 38 of the conductive layer 34 of the electromagnetic wave shielding sheet 20 and the grounding conductor 42, and the solid region 38 of the conductive layer 34 Although the example which contacts the grounding conductor 42 and makes these mutually conduct was shown, it is not restricted to this. For example, the conduction member 50 is disposed between the pattern region 34 of the conductive layer 34 of the electromagnetic wave shielding sheet 30 and the grounding conductor 42, and the pattern region 34 of the conductive layer 34 and the grounding conductor 42 are connected to each other. You may make it mutually contact and conduct | electrically_connect. At this time, a region of the pattern region 36 of the conductive layer 34 that the conductive member 50 contacts is located in a non-transmissive region that forms an edge of the conductive layer 34 and does not transmit image light. In this example, the solid region 38 of the conductive layer 34 may be omitted.

  Further, in the above-described embodiment, the electromagnetic wave shielding sheet 30 has an example in which the conductive layer 34 including the pattern region 36 in which the conductive material is arranged in a predetermined pattern is shown. Other conductive layers 34 may be included. For example, the electromagnetic wave shielding sheet 30 is formed by forming a transparent conductive film having no opening portion including a plurality of silver films and transparent oxide films laminated on both sides of the silver film over the front surface. You may make it have as.

  Furthermore, in the above-described embodiment, the conductive frame 40 that faces the four edges along the four sides of the conductive layer 34 of the electromagnetic wave shielding sheet 30 having a rectangular shape in plan view and supports the image display unit 20. An example is shown in which a part of the grounding conductor 42 is disposed, and a conductive member 50 extending linearly is provided between each edge of the conductive layer 34 and the grounding conductor 42. Not limited to. For example, the grounding conductor 42 is disposed to face one or more edges along one or more sides of the conductive layer 34 of the electromagnetic wave shielding sheet 30 having a rectangular shape in plan view, and one or more conductive layers 34 are arranged. A conductive member 42 extending linearly may be provided between the edge portion and the grounding conductor 42. As a specific example, any one or more of the four conduction members 50 shown in FIG. 2 may be omitted. Further, the conducting member 50 does not extend over the entire length of the linear edge along one side of the conductive layer 34, and a part of the linear edge along one side of the conductive layer 34. Only the top may be extended.

  Further, in the above-described embodiment, the example in which the conduction member 50 includes the elastic member 54 and the cloth material 52 that surrounds the elastic member 54 in a circumferential shape has been described, but the present invention is not limited thereto. For example, as shown in FIG. 6, the cloth material 152 may partially surround the elastic member 54. In the example shown in FIG. 6, the adhesive 58 is applied to a portion of the outer surface of the elastic member 54 that is not surrounded by the cloth material 152. Also by the conductive member 50 shown in FIG. 6, the conductive cloth material 52 of the conductive member 50 is in contact with the edge of the conductive layer 34 of the electromagnetic wave shielding sheet 30 and the grounding conductor 42. Can be conducted to each other.

  Furthermore, in the above-described embodiment, the example in which the conductive member 50 has an elliptical shape in the cross section orthogonal to the longitudinal direction is shown, but the present invention is not limited to this, and may have various shapes. . The cross-sectional shape of the conductive member 50 may be an oval shape that is not an exact elliptical shape, or a polygonal shape (for example, a rectangular shape as shown in FIG. 7, a square shape, an octagonal shape, etc.). There may be. In order to change the cross-sectional shape of the conductive member 50, for example, as shown in FIG. 7, the cross-sectional shape of the elastic member 154 of the conductive member 50 may be changed as appropriate.

  Further, in the above-described embodiment, the example in which the conductive member 50 is bonded to the conductive layer 34 of the electromagnetic wave shielding sheet 30 has been described, but the present invention is not limited thereto. The conduction member 50 may be bonded to the grounding conductor 42. Also in this example, the electromagnetic wave shielding sheet 30 can be easily incorporated into the display 10 without requiring complicated work. The conductive member 50 may not be bonded to either the conductive layer 34 of the electromagnetic wave shielding sheet 30 or the grounding conductor 42, or the conductive layer 34 of the electromagnetic wave shielding sheet 30 and the grounding conductor. 42 may be adhered to both.

  Further, in the above-described embodiment, the example in which the grounding conductor 42 is formed of a part of the frame 40 formed as an integral body has been shown, but the present invention is not limited thereto. For example, as shown in FIG. 8 and FIG. 5 described above, the frame 140 is formed as a separate body from the frame body 41 and the frame body 41, and is connected to the frame body 41 via the fixture 45. You may make it have. In the example shown in FIG. 8, the auxiliary frame 47 constitutes the grounding conductor 42 as a part of the frame 140.

  Furthermore, as described above, some modified examples related to the above-described embodiment have been described, but naturally, a plurality of modified examples can be applied in appropriate combination.

  EXAMPLES Hereinafter, although this invention is demonstrated in detail using an Example, this invention is not limited to this Example.

  As described below, displays according to Example 1 and Comparative Example 1 were produced. And about each produced display, electromagnetic wave shielding performance was evaluated.

Example 1
A 42-inch type plasma display having the configuration shown in FIGS. 1 to 4 was produced. Among these, a commercially available image display unit (PDP), a control device (control circuit) that controls the image display unit, a portion that supports the image display unit of the frame, and the like were used. The frame has a rectangular opening that forms an image display section.

The base material of the electromagnetic wave shielding sheet was a biaxially stretched polyethylene terephthalate (PET) sheet having a thickness of 100 μm. In addition, by laminating a copper foil having a thickness of 10 μm on a base material via an adhesive layer of a two-component curable urethane resin, and then patterning the copper foil into a mesh shape by photoetching, an electromagnetic wave shielding sheet A conductive layer was produced. The conductive layer had a square lattice-shaped pattern region with a line width of 10 μm and a repetition period of 300 μm, and a solid region with a width of 15 mm arranged at the periphery of the pattern region. The surface resistance value of the produced conductive layer was measured by a four-terminal method using “Loresta-EP MCP-T360, manufactured by Mitsubishi Chemical Corporation” and found to be 4.2 × 10 ⁻² Ω / □.

  The electromagnetic wave shielding sheet thus obtained was adhered to a glass substrate (manufactured by Central Glass) having a thickness of 2.5 mm through an adhesive layer having a thickness of 25 μm to produce a composite filter material. This composite filter material was disposed between the grounding conductor of the frame and the outer frame. The grounding conductor was a part of the frame surrounding the opening of the frame. The conductive layer of the electromagnetic wave shielding sheet is opposed to the grounding conductor, and the conductive member described above is interposed between the conductive layer and the grounding conductor. It was.

  The conductive member extends linearly between the circumferential grounding conductor of the frame and the periphery of the conductive layer of the electromagnetic shielding sheet, and the opening of the frame extends over the entire circumference together with the conductive layer of the electromagnetic shielding sheet. Arranged to cover. The outer frame was positioned with respect to the frame so that the conducting member was elastically deformed by being pressed between the electromagnetic wave shielding sheet and the grounding conductor.

  The elastic member of the conducting member was a sponge. The cloth material for the conductive member was made of woven metal fibers. The metal fiber was a composite fiber material obtained by depositing copper on the surface of a resin core material.

  A display according to Example 1 was produced as described above.

(Comparative Example 1)
Unlike Example 1, the outer frame was positioned with respect to the frame so that the edge of the conductive layer of the electromagnetic wave shielding sheet and the grounding conductor of the frame were in direct contact without using a conductive member. Except for this point, the display was manufactured in the same manner as the display according to Example 1.

(Evaluation)
In an anechoic chamber compliant with the VCCI 3m method, vertical polarization and horizontal polarization were measured in the range of 30 MHz to 1000 MHz. A display produced on a turntable having a height of 80 cm was placed. A dipole antenna was used as the antenna, and the measurement was performed at a height of 1 m for vertical polarization, and at a height of 2 m for horizontal polarization.

  For the display according to Example 1, the standard value of VCCI class B could be stably satisfied in the entire measurement range. About the display which concerns on the comparative example 1, compared with the display which concerns on Example 1, the standard value of VCCI class B cannot be satisfy | filled in all the measurement ranges, and electromagnetic wave shielding performance was not stabilized. .

FIG. 1 is a cross-sectional view illustrating a schematic configuration of a display for explaining an embodiment of the present invention. FIG. 2 is a partially enlarged view of FIG. FIG. 3 is a diagram for explaining an embodiment according to the present invention, and is a plan view showing a display filter. 4 is a cross-sectional view taken along line IV-IV in FIG. FIG. 5 is a cross-sectional view corresponding to FIG. 1 and showing a modification of the display. FIG. 6 is a cross-sectional view showing a modification of the conductive member. FIG. 7 is a cross-sectional view showing another modification of the conductive member. FIG. 8 is a cross-sectional view corresponding to FIG. 1 and showing another modification of the display.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Display 15 Filter 20 Image display part 30 Electromagnetic wave shielding sheet 32 Base material 34 Conductive layer 36 Pattern area 38 Solid area 40,140 Frame 42 Grounding conductor 50 Conductive member 52,152 Cloth material 54,154 Elastic member 58 Adhesive

Claims (11)

In a display including an image display unit,
An electromagnetic wave shielding sheet that is disposed on the viewer side of the image display unit and has a sheet-like base material and a conductive layer supported by the base material,
A grounding conductor disposed opposite to the edge of the conductive layer of the electromagnetic wave shielding sheet, the grounding conductor to be grounded when the display is used;
A conductive member disposed between an edge portion of the conductive layer of the electromagnetic wave shielding sheet and the grounding conductor, and conducting the conductive layer and the grounding conductor to each other;
The display comprising the conductive member having a conductive cloth material in contact with the conductive layer and the grounding conductor, and an elastic member at least partially surrounded by the cloth material. The display according to claim 1, wherein the elastic member of the conductive member is pressed and elastically deformed from the conductive layer and the grounding conductor of the electromagnetic wave shielding sheet. The said conduction | electrical_connection member is adhere | attached on the at least any one of the said conductive layer of the said electromagnetic wave shielding sheet, and the said conductor for earthing | grounding via the adhesive agent. Display. The conductive layer includes a pattern region in which a conductive material is disposed on the substrate in a desired pattern, and a solid layer in which the conductive material is disposed on the substrate in a planar shape adjacent to the conductive pattern region. An area, and
The grounding conductor is disposed to face the solid region of the conductive layer, and the conductive member is in contact with the solid region of the conductive layer. The display according to one item. The grounding conductor is disposed facing one or more edges along one or more sides of the conductive layer of the electromagnetic wave shielding sheet having a rectangular shape in plan view,
5. A conductive member extending linearly is provided between the one or more edges of the conductive layer and the grounding conductor. Display as described in. The display according to claim 1, wherein the grounding conductor is a part of a frame that supports the image display unit. Opposing to the four edges along the four sides of the conductive layer of the electromagnetic wave shielding sheet having a rectangular shape in a plan view, a grounding conductor forming a part of a conductive frame that supports the image display unit is disposed,
A conductive member extending linearly is provided between each edge of the conductive layer and the grounding conductor,
The display according to any one of claims 1 to 4, wherein the image display unit is arranged in a housing formed by the frame and an electromagnetic wave shielding sheet. A sheet-like base material and a conductive layer supported by the base material, and a rectangular electromagnetic wave shielding sheet in plan view;
A conductive member disposed on an edge of the conductive layer of the electromagnetic wave shielding sheet and electrically connected to the conductive layer;
The display-use filter, wherein the conducting member includes a conductive cloth material in contact with the conductive layer, and an elastic member at least partially surrounded by the cloth material. The display filter according to claim 8, wherein the conductive member is bonded to an edge of the conductive layer of the electromagnetic wave shielding sheet via an adhesive. 10. The conductive member is disposed on one or more edges along one or more sides of the conductive layer of the electromagnetic wave shielding sheet having a rectangular shape in plan view. Filter for display according to 1. The conductive layer includes a pattern region in which a conductive material is disposed on the substrate in a desired pattern, and a solid layer in which the conductive material is disposed on the substrate in a planar shape adjacent to the conductive pattern region. An area, and
The display filter according to claim 8, wherein the conducting member is disposed on the solid region of the conductive layer.

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