JP2009188314A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device which reduces leakage of electromagnetic waves from a flexible cable and dissipates heat generated by electronic member such as a control circuit. <P>SOLUTION: The display device includes: a display unit 7 having a metallic member 71 provided on a rear surface thereof; a flexible cable 6 having one end connected to the display unit 7; a substrate 5 on which a control circuit 51 for controlling the display unit 7 is mounted and to which the other end of the flexible cable 6 is connected; a composite member 8 including a spacer member 81 partially provided between the metallic member 71 and the flexible cable 6 to form a gap between the flexible cable 6 and the metallic member 71 and a heat dissipating member 82 partially provided between the metallic member 71 and the substrate 5 to dissipate heat from the substrate 5. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a display device including a display unit including a display panel. More specifically, the electromagnetic wave generated from the flexible cable connected to the display unit is reduced from affecting other members.

  In general, a display device 100 used in a digital camera, a car navigation system, or the like includes a display unit 101, a flexible cable 102 electrically connected to the display unit 101, and a flexible cable 102 as shown in FIG. And a control circuit 103 that is electrically connected. Thus, an image signal is transmitted from the control circuit 103 to the display unit 101 so that the display unit 101 can display an image.

  However, in such a device, since a high-frequency signal such as a digital signal is transmitted on the flexible cable, unnecessary radiation noise (electromagnetic wave) is generated on the flexible cable.

Therefore, in patent document 1, in order to solve such a subject, the metal foil for shielding is adhere | attached on the one side or both sides of a flexible cable, and this metal foil for shielding is connected to an outer frame.
JP 2005-49774 A

By the way, in such an apparatus, as shown in FIG. 9, when the back surface of the display unit 101 is composed of a metal member 104 such as a sheet metal, when the flexible cable is close to the metal member,
The radiation component from the flexible cable propagates to the metal member. That is, as an EMC measure, it is necessary to reduce leakage of unnecessary radiation components from the flexible cable.

  In addition, the control circuit that controls the display unit generates a large amount of heat because the processing data increases and the control drive frequency increases with an increase in image quality and functionality of the displayed image. This heat may cause abnormal operation of the control circuit or heat generation of the display device.

  SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide a display device that reduces leakage of electromagnetic waves from a flexible cable and dissipates heat generated by an electronic member such as a control circuit.

  In order to solve the above problems, the present invention provides a display unit having a metal member on the back and capable of displaying an image, a flexible cable having one end connected to the display unit, and a control circuit for controlling the display unit. A substrate that is mounted and to which the other end of the flexible cable is connected, at least a portion is provided between the metal member and the flexible cable, and a spacer member that provides a distance between the metal member and the flexible cable, and at least a portion Is provided between the metal member and the substrate, and includes a heat dissipation member that dissipates heat from the substrate.

  In this way, since a distance can be provided between the display unit and the flexible cable, it is possible to reduce the occurrence of electromagnetic waves from the flexible cable to the metal member. Moreover, since the heat radiating member is provided between the substrate and the metal member, the heat generated in the substrate can be conducted to the outside through the metal member.

  Preferably, the flexible cable is wired so as to pass through an area formed by the spacer member and the heat radiating member.

  In this way, it can be avoided that the spacer member is accidentally detached from between the display unit and the flexible cable.

  Furthermore, preferably, a part of the area formed by the spacer member and the heat radiating member is opened.

  If it does in this way, the attachment operation | work of the composite member with respect to a flexible cable can be made easy.

  That is, in the present invention, since a distance is provided between the metal member and the flexible cable, leakage of electromagnetic waves from the flexible cable to the metal member can be reduced. Moreover, since the heat radiating member is provided between the substrate and the metal member, the heat generated in the substrate can be conducted to the outside through the metal member.

(Embodiment 1)
1. Configuration Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The present embodiment will be described by taking the case where it is applied to the digital camera 1 as an example.

  FIG. 1 is a configuration diagram when the back case 3 is removed from the digital camera 1 according to the present embodiment. FIG. 2 is a configuration diagram for explaining the inside of the back case 3 according to the present embodiment. FIG. 3 is a view for explaining the composite member 8 according to the present embodiment. FIG. 4 is a cross-sectional view taken along line AA in FIG.

  The present embodiment includes a lens unit 4, a substrate 5, a flexible cable 6 connected to the substrate 5, a display unit 7, and a composite member 8. The composite member 8 includes a spacer member 81 that reduces radiation from the flexible cable 6 to the display unit 7 and a heat dissipation member 82 that dissipates heat from the substrate 5. As a result, the radiation from the flexible cable 6 can be reduced and the heat generated in the substrate can be released with a single member. Hereinafter, a specific configuration of the digital camera 1 will be described.

  FIG. 1 shows a diagram in which a lens unit 4 and a substrate 5 are provided on a front case 2 of a digital camera 1.

  The lens unit 4 includes an optical system including a lens and the like, a drive unit that drives the lens, and an image sensor. The image pickup device picks up the light collected through the optical system as image data. Image data captured by the image sensor is converted from an analog signal to a digital signal by an AD converter. The digitized image data is subjected to predetermined image processing by an image processing unit. The predetermined image processing includes YC conversion, gamma conversion, electronic zoom processing, and the like. The image data subjected to the image processing is transmitted to the control circuit 51 mounted on the substrate 5 via a connector, an electric wire or the like. The lens unit 4 is electrically connected to the lens cable 41. In this case, the connecting portion 42 of the lens unit 4 and the lens cable is connected by solder. The lens cable is electrically connected to the lens connector 54 mounted on the substrate 5.

  As shown in FIG. 1, in addition to the control circuit 51, a display panel connector 52, a backlight connector 53, and a lens connector 54 are mounted on the substrate 5. Note that another electronic member such as a connector or a semiconductor circuit may be mounted on the substrate 5.

  The control circuit 51 is provided on either the front or back of the mounting surface of the substrate 5 and controls the display unit 7. For example, the control circuit 51 outputs image data on which image processing has been performed to the display unit 7. As a result, the control circuit 51 can display image data on the display unit 7. The control circuit 51 may be realized by a microcomputer or a hard-wired circuit.

  The display panel connector 52 is electrically connected to the control circuit 51. Electrical connection is possible by an electric wire such as a copper foil pattern. Similarly, the backlight connector 53 is also electrically connected to the control circuit 51. The same applies to the lens connector 54.

  FIG. 2 shows a diagram in which the display unit 7, the flexible cable 6, and the backlight cable 9 are provided on the back case 3 of the digital camera 1.

  As the display unit 7, a liquid crystal monitor, an organic EL display, or the like can be used. For example, when realized by a liquid crystal monitor, the display panel and the backlight are included. The display panel receives image data from the flexible cable 6 and displays an image on the display panel. The backlight switches on / off the irradiation of light based on a control signal from the backlight cable 9. Here, the back surface of the display unit 7 is provided with a metal member 71 such as a sheet metal.

  The flexible cable 6 is for electrically connecting the display panel and the display panel connector 52. The flexible cable 6 is printed on a thin film and has terminals at both ends. The flexible cable 6 is configured by covering an insulator on the surface of a thin film on which printed wiring is provided. Thereby, the display panel and the substrate 5 can be electrically connected, and signal transmission between the display panel and the control circuit 51 of the substrate 5 is enabled.

  The backlight cable 9 electrically connects the backlight and the backlight connector 53. Thereby, the control signal from the control circuit 51 can be transmitted to the backlight.

  The composite member 8 includes a spacer member 81 and a heat radiating member 82 (FIG. 3). The composite member 8 is provided with an adhesive member 84 on at least a part of the surface on the display unit 7 side so that it can be adhered to the display unit 7 or the like. An adhesive can be used for the adhesive member 84, and a strong or weakly adhesive member can be used. The installation of the composite member 8 on the back case 3 is not limited to the adhesive member 84, and can be performed by a mechanism component such as a screw.

  A part of the spacer member 81 is provided between the display unit 7 and the flexible cable 6, and a distance is provided between the metal member 71 and the flexible cable 6. That is, the spacer member 81 prevents the metal member 71 of the display unit 7 and the flexible cable 6 from coming close to each other. The spacer member 81 can be configured by a film member such as a PET film. That is, the spacer member 81 can be made of synthetic resin.

  A part of the heat dissipating member 82 is provided between the display unit 7 and the substrate 5, and dissipates heat from the substrate 5. The heat dissipating member 82 is made of a member having higher heat conductivity than a semiconductor such as metal. For example, the heat radiating member 82 can be configured by a copper foil film. Thereby, it can be made to contact the board | substrate 5 and a heat can be dissipated.

  Here, the structure of the composite member 8 of this Embodiment is demonstrated using FIG. The composite member 8 includes two film members that are spacer members 81 and a copper foil film that is a heat dissipation member 82. A copper foil film is sandwiched between two film members. At this time, it is bonded by the bonding member 86. Thereby, the role of the spacer and the role of heat dissipation are made possible by one member. In the present embodiment, the composite member 8 is configured by two film members and a copper foil film. However, the present invention is not limited to this, and any material can be used as long as it can serve as a spacer and a heat dissipation role. Such a configuration may be adopted.

  If the copper thin film is sandwiched between two film members as in the present embodiment, the composite member can also be provided on the upper surface of the substrate 5 or the upper surface of the lens unit 4 (connection portion 42). It can also function as the insulating member 83 of the substrate 5 or the lens unit 4 (connection portion 42). That is, the film member constituting the spacer member 81 can be insulated.

  Further, the composite member 8 is not limited to the shape as in the present embodiment, and the flexible cable 6 may be surrounded by the spacer member 81a and the heat dissipation member 82a as shown in FIG. By doing so, it is possible to avoid the spacer member 81a from being accidentally detached from between the metal member 71 and the flexible cable 6.

In this case, an opening 85a that opens a part of the portion surrounding the flexible cable 6 may be provided. In this way, the work of attaching the composite member 8 to the flexible cable 6 can be facilitated.
2. Next, a method for assembling the digital camera 1 configured as described above will be described. In the present embodiment, the description will be made assuming that FIGS. 1 and 2 have been assembled.

  First, the composite member 8 of FIG. 3 is attached to the back case 3 of FIG. 2 (FIG. 5). At this time, the spacer member 81 is provided between the metal member 71 and the flexible cable 6, and the heat dissipating member 82 is installed on the substrate 5. The upper part of the board | substrate 5 is providing the heat radiating member 82 in the position of FIG. Moreover, it installs so that the insulating member 83 may come to the upper part of the connection part 42 of the lens unit 4 (FIG. 6). In this way, the connection portion can be insulated. Here, as shown in FIG. 3, the heat dissipating member 82 has a substantially U-shape so as to be disposed at a position where the metal member 71 is provided. Thereby, the area where the heat radiating member 82 is disposed on the metal member 71 is widened so that the heat conduction from the heat radiating member 82 to the metal member 71 is increased as much as possible.

  Next, the rear case 3 to which the composite member 8 is attached is attached to the front case 2. At this time, the flexible cable 6 is connected to the display panel connector 52 and the backlight cable is connected to the backlight connector 53. Note that the back case 3 and the front case 2 can be connected by mechanical parts such as screws. Thereby, the assembly of the digital camera 1 is completed.

When the assembly is completed, the configuration is as shown in FIG. That is, in the digital camera 1, the spacer member 81 is provided between the display unit 7 and the flexible cable 6, and the metal member 71 is provided above the substrate 5. Thus, by providing a distance between the display unit 7 and the flexible cable 6, leakage of electromagnetic waves to the metal member 71 of the display unit 7 is reduced, and by disposing the heat radiating member 82 on the substrate 5, The heat generated in 5 is released to the outside.
3. Summary As described above, in the present embodiment, the display unit 7 provided with the metal member 71 on the back surface, the flexible cable 6 having one end connected to the display unit 7, and the control circuit 51 for controlling the display unit 7 are mounted. A substrate 5 to which the other end of the flexible cable 6 is connected; a spacer member 81 that is partially provided between the display unit 7 and the flexible cable 6 and reduces leakage of electromagnetic waves from the flexible cable 6 to the metal member 71; The composite member 8 is provided between the display unit 7 and the substrate 5 and has a heat radiating member 82 that dissipates heat from the substrate 5. Since it did in this way, the spacer member 81 can be provided between the metal member 71 and the flexible cable 6, and the heat dissipation member 82 can be provided between the substrate 5 and the metal member 71. Thereby, the leakage of electromagnetic waves from the flexible cable 6 can be reduced, and the heat generated in the substrate 5 can be dissipated to the outside.
(Other embodiments)
Embodiment 1 was illustrated as embodiment of this invention. However, the present invention is not limited to the first embodiment, and can be implemented in other embodiments. Therefore, other embodiments of the present invention will be described collectively below.

  In the present embodiment, the flexible cable 6 is bent and connected to the substrate 5 as shown in FIG. 7, but the present invention is not limited to this.

  That is, the present invention is not limited to the above-described embodiment, and can be implemented in various modes.

  The present invention can be applied to a display device capable of displaying an image. Specifically, it can be used for a digital camera equipped with a television receiver or a display device, a movie, a mobile terminal with a camera, or the like.

The schematic diagram which shows the structure of the state which removed the back case of the digital camera concerning this Embodiment The schematic diagram which shows the structure inside the back case concerning this Embodiment. The figure for demonstrating the composite member concerning this Embodiment AA line sectional view of FIG. The figure for demonstrating the example which installed the composite member in the back case concerning this Embodiment The figure for demonstrating the installation position of the composite member in the back case concerning this Embodiment. 5 is a partial cross-sectional view taken along line BB in a state where the back case of FIG. 5 is attached to the front case of FIG. 1 according to the present embodiment. The figure for demonstrating the composite member concerning other embodiment. The figure for demonstrating the subject in a prior art

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Digital camera 2 Front case 3 Back case 4 Lens unit 41 Lens cable 42 Connection part 5 Board | substrate 51 Control circuit 52 Display panel connector 6 Flexible cable 7 Display unit 71 Metal member 8, 8a Composite member 81, 81a Spacer member 82, 82a Heat radiation member 83, 83a Insulating member 84 Adhesive member 85a Opening 86 Adhesive member

Claims (3)

A display unit provided with a metal member on the back and capable of displaying an image;
A flexible cable having one end connected to the display unit;
A control circuit for controlling the display unit is mounted, and a substrate to which the other end of the flexible cable is connected;
A composite member comprising: a spacer member provided at least partially between the metal member and the flexible cable; and a heat dissipating member provided at least partially between the metal member and the substrate to dissipate heat from the substrate. When,
A display device comprising: The display device according to claim 1, wherein the flexible cable is wired so as to pass through an area formed by the spacer member and the heat dissipation member. The area formed by the spacer member and the heat radiating member is formed by opening a part thereof.
The display device according to claim 2.

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