JP6061711B2 - Display device - Google Patents

Description

  The present invention provides a display device that includes a control board that controls driving of a display panel and suppresses leakage of unnecessary radiation emitted from the control board.

  Thin display devices (for example, liquid crystal display devices) are generally widespread because they have a larger display area than the installation area. The display device includes a display panel that displays an image, a chassis that is disposed on the back side of the display panel and supports a light source, and a control board that is fixed to the chassis and controls driving of the display panel. Is provided.

  Due to the thinness, even if a large-screen display device is installed indoors, the user does not feel as tight as before, and many display devices with a large display area have been proposed. When the display area is increased, the pixel density is decreased, and the user may feel a decrease in video quality. Therefore, a display screen is configured using a high-definition image display technique (for example, 4K2K).

  In order to realize high-definition image display technology, it is necessary to perform image processing at high speed on the control board. To achieve high processing speed, it is necessary to mount a large number of large processors on the control board. Is done. As a result, high-frequency electromagnetic waves (unwanted radiation) are generated from the control board.

  Unwanted radiation may cause malfunction of other electronic devices installed near the display device, and it is common practice to cover the control board with a shield case to avoid leakage of unnecessary radiation from the display device. ing. The shield case covers the control board and is fixed to the chassis. The shield case is provided with a hole for drawing the wiring connected to the control board to the outside of the shield case.

  As described above, when image processing is performed at high speed, unnecessary high-frequency radiation is generated, and therefore, unnecessary radiation that cannot be ignored may leak from a hole provided in the shield case. Therefore, it has been proposed to reduce leakage of unnecessary radiation by providing a gasket around the hole (for example, Patent Document 1).

  The gasket described in Patent Document 1 has a hole, and a seal portion harder than the gasket is formed on the inner peripheral surface of the hole. The hole provided in the gasket and the hole provided in the shield case are associated with each other. The wiring can be pulled out of the shield case.

Japanese Patent No. 4246682

  However, the hard seal portion does not adhere to the wiring, and a large gap is generated between the wiring and the inner periphery of the hole, so that leakage of unnecessary radiation cannot be sufficiently reduced.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a display device that can sufficiently reduce leakage of unnecessary radiation even when a wiring is pulled out from a shield case.

The display device according to the present invention includes a display panel that displays an image, a support unit that is disposed on the back side of the display panel, supports a light source, and is fixed to the support unit, and drives the display panel. In a display device including a control board that performs control or image processing and a shield case that covers the control board and is electromagnetically shielded, the shield case is opposed to the support part, and elastic between the shield case and the support part. is provided with a member, Yes connected to the control board, the Ri sandwiching the wiring extending to the outside of the shield case by the elastic member and the support portion tear, the supporting portion in the portion opposed to the shield case, wherein having two protrusions spaced apart in a direction intersecting the circumferential direction of the shield case, and wherein the Oh isosamples arranged the elastic member between the two projections.

  In the display device according to the present invention, two slits along the direction intersecting the circumferential direction of the shield case are juxtaposed in the circumferential direction on the elastic member, and the wiring is arranged between the two slits. It is characterized by being.

  In the present invention, since the elastic member is provided at the peripheral portion of the shield case and the wiring is sandwiched between the elastic member and the chassis, the elastic member is in close contact with the periphery of the wiring. Therefore, it is possible to reliably prevent a gap from being generated around the wiring and sufficiently reduce leakage of unnecessary radiation.

1 is a perspective view schematically showing a television receiver according to Embodiment 1. FIG. It is the simplified rear view which abbreviate | omitted the rear cabinet. FIG. 3 is a schematic cross-sectional view taken along line III-III shown in FIG. 2. It is a simplified expanded rear view of a shield case. It is a schematic perspective view of a shield case. It is sectional drawing which shows schematically the structure of a shield case vicinity. It is an enlarged view which shows the elastic member of the slit vicinity schematically. FIG. 8 is a schematic enlarged sectional view taken along line VIII-VIII shown in FIG. 7. 10 is an enlarged cross-sectional view schematically showing a shield case, an elastic member, and a backlight chassis of a television receiver according to Embodiment 2. FIG.

(Embodiment 1)
Hereinafter, the present invention will be described in detail with reference to the drawings showing a television receiver according to a first embodiment. FIG. 1 is a perspective view schematically showing a television receiver.

  In the figure, reference numeral 1 denotes a television receiver. The television receiver 1 is disposed in the display device 100 for displaying an image and broadcast waves (TV) from an antenna (not shown). John broadcast) and a decoder 300 disposed in the display device 100 for decoding the encoded broadcast wave. The television receiver 1 decodes the broadcast wave received by the tuner 200 by the decoder 300 and displays an image on the display device 100 based on the decoded information. Note that the tuner 200 and the decoder 300 may be provided outside the display device 100 and connected to the display device 100.

  The display device 100 includes a rectangular display panel 10 having a liquid crystal, and the display panel 10 is configured to control the voltage applied to the liquid crystal to adjust the light transmittance. The display panel 10 is accommodated vertically in the front cabinet 20 and the rear cabinet 30 arranged on the front side and the back side, respectively. The front cabinet 20 has a rectangular frame shape, and has a rectangular opening 20a at the center thereof. The front cabinet 20 is made of, for example, an aluminum member. The rear cabinet 30 has a rectangular tray shape with the front side opened, and is made of, for example, an electrogalvanized steel sheet. By using the front cabinet 20 and the rear cabinet 30 as metal, efficient heat dissipation can be realized, and the difference in thermal expansion coefficient between the two can be reduced to prevent the occurrence of distortion. In addition, you may comprise the front cabinet 20 and the back cabinet 30 with a resin member.

  2 is a schematic rear view in which the rear cabinet 30 is omitted, and FIG. 3 is a schematic cross-sectional view taken along the line III-III shown in FIG.

  In the front cabinet 20 and the rear cabinet 30, a backlight chassis 40 (support portion) that supports the light source is provided. The backlight chassis 40 has a rectangular box shape with an opening on the front side, and is disposed on the back side of the display panel 10. A plurality of LEDs 15 (Light Emitting Diodes) are provided as light sources on the entire front surface of the backlight chassis 40. A diffusion plate 11 that diffuses light is provided between the backlight chassis 40 and the display panel 10. An optical sheet 12 that collects light and diffuses light is provided in front of the diffusion plate 11. The light emitted from the LED 15 is diffused by the diffusion plate 11, condensed and diffused by the optical sheet 12, and reaches the display panel 10.

  As shown in FIG. 2, two columnar reinforcing bodies 45, 45 that are long in the vertical direction are juxtaposed in the horizontal direction at the center of the back surface of the backlight chassis 40. A plurality of signals (for example, an HDMI (High Definition Multimedia Interface) signal) are input between one reinforcing body 45 and one side edge of the backlight chassis 40 to generate a predetermined signal (for example, a 4K2K signal). An input board 50 and a main board 51 on which the tuner 200 is mounted are arranged in parallel in the vertical direction.

  A power supply board 52 for supplying power is provided between the other reinforcing body 45 and the other side edge of the backlight chassis 40. An image processing board 53 for processing an image and a drive control board 54 for controlling driving of the liquid crystal are provided between the reinforcing bodies 45 and 45. A plurality of harnesses 55 and flat cables 56 (wiring) are connected to the image processing board 53 or the drive control board 54 and extend outward from the image processing board 53 or the drive control board 54 (described later). (See FIG. 4).

  The image processing board 53 and the drive control board 54 execute image processing and liquid crystal drive control corresponding to, for example, 4K2K. Since 4K2K has a resolution four times that of full HD (Full High Definition), when video data related to full HD is input, the image processing board 53 and the drive control board 54 have a high frequency to support 4K2K. Drives and emits large electromagnetic waves (unwanted radiation). Therefore, the image processing board 53 and the drive control board 54 are covered with a shield case 60 that blocks electromagnetic waves.

  4 is a schematic enlarged rear view of the shield case 60, FIG. 5 is a schematic perspective view of the shield case 60, FIG. 6 is a cross-sectional view schematically showing the configuration in the vicinity of the shield case 60, and FIG. FIG. 8 is a schematic enlarged sectional view taken along the line VIII-VIII shown in FIG. In FIG. 7, the description of the shield case 60 is omitted.

  The shield case 60 has a rectangular vertically long box shape with an open front side. A plurality of heat radiation holes 62, 62,... 62 for releasing heat generated in the image processing substrate 53 and the drive control substrate 54 are provided in the bottom surface 60a and the peripheral surface 60b of the shield case 60. A flange portion 61 parallel to the bottom surface 60a is provided at the edge of the peripheral surface 60b of the shield case 60. The front end portion of the flange portion 61 is bent at a substantially right angle on the side opposite to the bottom surface 60a.

  An elastic member 70 is fixed to the front surface of the flange portion 61 by a double-sided tape having conductivity. The elastic member 70 has an elongated rod shape, and at least a peripheral surface portion thereof has conductivity. The elastic member 70 is constituted by an elongated rod-like main body portion made of, for example, polyurethane foam, and a conductive cloth that covers the entire peripheral surface of the main body portion. The elastic member 70 is attached to the front surface of the flange portion 61 along the distal end portion of the bent flange portion 61. The tip portion positions the elastic member 70. In addition to the double-sided tape, the elastic member 70 may be fixed to the flange portion 61 with a pin.

  As shown in FIG. 7, the elastic member 70 is provided with two slits 71 and 71. The slits 71 and 71 are parallel to a direction intersecting or orthogonal to the circumferential direction of the shield case 60 and are arranged in the circumferential direction. The slit 71 is formed by cutting the entire elastic member 70 along the width direction and thickness direction of the elastic member 70 (two directions intersecting or orthogonal to the longitudinal direction of the elastic member 70).

  The two slits 71 and 71 are provided at positions corresponding to the plurality of harnesses 55 and flat cables 56, respectively. In other words, the elastic member 70 is provided with a pair of slits 71 and 71 corresponding to the harness 55 and the flat cable 56, respectively.

  The shield case 60 covers the image processing board 53 and the drive control board 54 from the back side so that the harness 55 and the flat cable 56 are located between the slits 71 and 71, respectively. The flange portion 61 faces the back surface of the backlight chassis 40 and is screwed.

  By screwing, the flange portion 61 comes close to the backlight chassis 40 via the elastic member 70, and the elastic member 70 is in close contact with the backlight chassis 40. As shown in FIG. 8, the harness 55 and the flat cable 56 extending from the image processing board 53 or the drive control board 54 are sandwiched between the elastic member 70 and the backlight chassis 40 located between the slits 71.

  The elastic member 70 is elastically deformed so as to cover the peripheral surfaces of the harness 55 and the flat cable 56 by a force acting from the harness 55 and the flat cable 56, and is in close contact with the harness 55 and the flat cable 56. As a result, it is possible to prevent a gap from being generated around the harness 55 and the flat cable 56, and to sufficiently reduce leakage of unnecessary radiation.

  Moreover, since the continuity of the elastic member 70 is cut off by the slits 71 and 71, only the portion located between the slits 71 and 71 in the elastic member 70 is deformed, and the other portions are not deformed. Therefore, it is possible to prevent the gap from being generated unnecessarily in other portions.

(Embodiment 2)
Hereinafter, the present invention will be described in detail with reference to the drawings showing a television receiver according to a second embodiment. FIG. 9 is an enlarged sectional view schematically showing the shield case 60, the elastic member 70, and the backlight chassis 40. As shown in FIG. 9, two protrusions 40 a and 40 a are provided on the back surface of the backlight chassis 40 at a portion facing the flange portion 61. The protrusion 40a is formed by a diaphragm. Both protrusions 40a, 40a are separated in the width direction of the flange portion 61 (the direction intersecting the circumferential direction of the shield case 60).

  The harness 55 and the flat cable 56 extend to the outside of the shield case 60 through the gaps between the protrusions 40 a and 40 a and the flange portion 61. The elastic member 70 is located between the protrusions 40a and 40a. The pressing force from the flange portion 61 acts on the harness 55 and the flat cable 56 via the elastic member 70, and particularly acts on the protrusions 40a and 40a in a concentrated manner. The protrusion 40a is in pressure contact with the harness 55 and the flat cable 56, and the elastic member 70 is in pressure contact with the harness 55 and the flat cable 56 in the vicinity of the protrusion 40a. Therefore, the periphery of the harness 55 and the flat cable 56 is sealed at two places (the place where the two protrusions 40a and 40a are provided), and the generation of a gap around the harness 55 and the flat cable 56 can be prevented more reliably and unnecessary radiation can be prevented. Leakage can be sufficiently reduced.

  The light source is not limited to the LED, but may be a cold cathode fluorescent tube, a hot cathode fluorescent tube, an incandescent bulb, an EL (Electroluminescence), or the like. The invention according to the present application can be applied not only to a liquid crystal display device but also to other display devices such as a plasma display device and an organic EL display device.

  The following matters are further disclosed regarding the embodiment of the present invention described above.

  The display device 100 according to the present invention is disposed on the back side of the display panel 10 that displays an image, the backlight chassis 40 (support portion) that supports the light source, and the backlight chassis 40. An image processing board 53 or a drive control board 54 (control board) that performs drive control or image processing of the display panel 10 and covers the image processing board 53 or the drive control board 54, and is electromagnetically shielded. In the display device 100 including the shield case 60, the shield case 60 faces the backlight chassis 40, and an elastic member 70 is provided between the shield case 60 and the backlight chassis 40. Alternatively, a harness 55 and a flat connected to the drive control board 54 and extending to the outside of the shield case 60 Characterized in that are sandwiched Buru 56 (wiring) by the elastic member 70 and the support portion.

  In the present invention, since the elastic member 70 is provided in the shield case 60 and the harness 55 and the flat cable 56 are sandwiched between the elastic member 70 and the backlight chassis 40, the elastic member 70 includes the harness 55 and the flat cable 56. Adhere closely to the surroundings. Therefore, it is possible to reliably prevent a gap from occurring around the harness 55 and the flat cable 56, and to sufficiently reduce leakage of electromagnetic waves (unwanted radiation).

  In the display device 100 according to the present invention, the elastic member 70 is provided with two slits 71, 71 arranged in the circumferential direction along the direction intersecting the circumferential direction of the shield case 60. The harness 55 and the flat cable 56 are arranged between 71.

  In the present invention, since the continuity of the elastic member 70 is interrupted by the slit 71, only the portion located between the slits 71 in the elastic member 70 is deformed, and the other portions are not deformed. Therefore, it is possible to prevent the gap from being generated unnecessarily in other portions.

  In the display device 100 according to the present invention, the support portion includes two protrusions 40a and 40a that are separated from each other in a direction intersecting a circumferential direction of the shield case 60 at a portion facing the shield case 60. The elastic member 70 is disposed between the two protrusions 40a, 40a.

  In the present invention, the periphery of the harness 55 or the flat cable 56 is sealed at two places (the place where the two protrusions 40a are provided), and the generation of a gap around the harness 55 or the flat cable 56 is more reliably prevented. In addition, leakage of unnecessary radiation can be sufficiently reduced.

  The television receiver 1 according to the present invention includes any one of the display devices 100 described above and a tuner 200 (receiving unit) that receives a television broadcast, and is based on the television broadcast received by the tuner 200. Thus, an image is displayed on the display device 100.

  In this invention, there exists an effect | action and effect similar to the display apparatus 100 mentioned above.

  It should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The technical features described in each embodiment can be combined with each other, and the scope of the present invention is intended to include all modifications within the scope of claims and the scope equivalent to the scope of claims. Is done.

1 Television receiver 10 Display panel 40 Backlight chassis (supporting part)
40a Protrusion 53 Image processing board (control board)
54 Drive control board (control board)
55 Harness (Wiring)
56 Flat cable (wiring)
60 Shield Case 70 Elastic Member 71 Slit 100 Display Device 200 Tuner (Receiver)

Claims (2)

A display panel that displays an image, a support unit that is disposed on the back side of the display panel and supports a light source, and a control board that is fixed to the support unit and performs drive control or image processing of the display panel And a display device that covers the control board and includes a shield case for electromagnetic shielding,
The shield case faces the support part,
An elastic member is provided between the shield case and the support part,
The Yes connected to the control board, Ri to hold the wire extending outside the shield case by the elastic member and the support portion tear,
The support part has two protrusions spaced apart in a direction crossing the circumferential direction of the shield case at a portion facing the shield case,
Display device comprising the Rukoto Oh by arranging an elastic member between said two projections. Two slits along the direction intersecting the circumferential direction of the shield case are juxtaposed in the circumferential direction in the elastic member,
The display device according to claim 1, wherein the wiring is arranged between the two slits.

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