JP2011186245A - Electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic device that effectively keeps dirt or dust from entering the surface of a liquid crystal display element without deteriorating image quality. <P>SOLUTION: The electronic device includes: a back cover 6 including an opening; a liquid crystal display device 10 arranged inside the opening 60 of the back cover 6; a protective cover 7 which has a gap G between a display surface 10a of the liquid crystal display device 10 and itself and covers the opening 60 of the back cover 6 so as to face the display surface 10a; a liquid crystal holder 16 which is fixed to the back cover 6, supporting a backside 10b of the liquid crystal display device 10; and a buffer member 18 which is provided at the side of the liquid crystal display device 10 and is in abutment with an inner wall 6a of the back cover 6. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an electronic device such as a digital camera provided with a liquid crystal display device.

  2. Description of the Related Art In recent years, so-called digital cameras that take a subject image using an imaging device such as a CCD or CMOS and record the taken image data on a recording medium have become widespread. In digital cameras, a well-known liquid crystal display is used to display and set various functions of the camera, live view display while observing the subject image during shooting, and image playback display to check the image after shooting. An element is used.

  In conventional digital cameras, a buffer member is provided to prevent light leakage from the protective cover into the camera and to prevent dust and dirt from entering between the protective cover and the liquid crystal display device. Such a buffer member is affixed between the display surface of the liquid crystal display device and the back cover of the digital camera.

  By the way, the liquid crystal display element is sealed by injecting a liquid crystal between the upper glass and the lower glass while maintaining a predetermined interval with a spacer. Therefore, when an external force is applied to the surface of the liquid crystal display element, the gap (gap) between the upper glass and the lower glass changes, the orientation of the liquid crystal changes, white irregularities, rainbow patterns, etc. occur and display image quality deteriorates. End up.

  As a holding structure of the liquid crystal display device, Patent Document 1 discloses a configuration in which an external force is not applied to the liquid crystal display element surface. In patent document 1, the front-end | tip of the rib protruded toward the exterior cover from the peripheral part of the liquid crystal holder which supports a liquid crystal display element is made to contact | abut to an exterior cover. Further, the stress applied to the exterior cover is applied to the rib to prevent the stress applied directly to the liquid crystal display element surface. In addition, a buffer member compressed with a stress that does not affect the surface of the liquid crystal display element is interposed in the gap between the liquid crystal display element and the display window in order to prevent entry of dust and dirt.

Japanese Patent Laid-Open No. 11-142820

  However, in consideration of dimensional variations and assembly errors of each component, there are not a few variations in stress applied to the surface of the liquid crystal display element. In recent years, liquid crystal display elements mounted on digital cameras have become larger in size and higher in resolution such as QVGA, VGA, and SVGA. As the resolution increases, the liquid crystal display element is weak against external stress. For this reason, it is difficult for the conventional holding structure of the liquid crystal display device to suppress deterioration in display image quality such as white unevenness and rainbow pattern due to external stress.

  Therefore, the present invention provides a liquid crystal display device that effectively suppresses the entry of dust and dirt into the surface of the liquid crystal display element without degrading the image quality.

  An electronic apparatus according to an aspect of the present invention includes a housing provided with an opening, a liquid crystal display device disposed inside the opening of the housing, and a display surface of the liquid crystal display device. A display window that covers the opening of the housing so as to face the display surface, a holding portion that supports the back surface of the liquid crystal display device and is fixed to the housing, and the liquid crystal display device or And a buffer member provided on a side surface of the holding portion and in contact with an inner wall of the housing.

  Other objects and features of the present invention are illustrated in the following examples.

  ADVANTAGE OF THE INVENTION According to this invention, the electronic device which suppresses effectively that a dust, dust, etc. approach the surface of a liquid crystal display element without degrading an image quality can be provided.

It is an external appearance perspective view of the digital single-lens reflex camera in a present Example. It is sectional drawing of the digital single-lens reflex camera cut | disconnected by the AA surface in FIG. It is an expanded sectional view of the digital single-lens reflex camera which cut | disconnected the BB surface in FIG. FIG. 3 is an enlarged view of a portion C in FIG. 2, and shows a periphery of a contact portion between the back cover 6 and the buffer member 18.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In each figure, the same members are denoted by the same reference numerals, and redundant description is omitted.

  First, a schematic configuration of a digital single-lens reflex camera (electronic device) in the present embodiment will be described. FIG. 1 is an external perspective view of a digital single-lens reflex camera. Reference numeral 1 denotes a camera body, and 2 denotes a photographing lens. The camera body 1 is mainly composed of exterior members such as an upper lid 3, a bottom lid 4, a front cover 5, and a back cover 6. The back cover 6 is provided with a protective cover 7 for protecting the liquid crystal display device 10 described later from external impact.

  FIG. 2 is a cross-sectional view of the digital single-lens reflex camera cut along the AA plane in FIG. 1. Reference numeral 10 denotes a liquid crystal display device. The liquid crystal display device 10 includes a liquid crystal display element 11, a flexible printed circuit board 12 attached to the liquid crystal display element 11, a backlight unit 13, a lower cover 14 that houses the backlight unit 13, and an upper cover 15. The backlight unit 13 includes a light guide plate, a reflection sheet, a brightness enhancement sheet, a backlight LED, and the like.

  The back cover 6 (housing) includes an opening 60, and the liquid crystal display device 10 is disposed inside the opening 60. The protective cover 7 (display window) is provided with a gap G between the display surface 10a of the liquid crystal display device 10 (the upper surface of the liquid crystal display element 11 in FIG. 2) and the back cover 6 is opposed to the display surface 10a. The opening 60 is covered.

  Reference numeral 16 denotes a liquid crystal holder (holding portion) for attaching the liquid crystal display device 10 to a predetermined position with respect to the back cover 6 (housing). The liquid crystal holder 16 supports the back surface 10 b of the liquid crystal display device 10 (the lower surface of the lower cover 14 in FIG. 2) and is fixed to the back cover 6 using screws 17. The liquid crystal display device 10 is fixed to the liquid crystal holder 16 using a double-sided tape.

  Reference numeral 18 denotes a buffer member for preventing light from leaking from the protective cover 7 to the inside of the camera, and for preventing dust and dirt from entering between the protective cover 7 and the liquid crystal display device 10. is there. The buffer member 18 is provided on the side surface of the liquid crystal display device 10 and abuts against the inner wall 6 a of the back cover 6. The buffer member 18 is preferably attached so as to surround the entire periphery of the peripheral edge (side surface) of the liquid crystal display device 10. However, when a sufficient buffering effect is obtained, the buffer member 18 may be attached to at least a part of the peripheral portion (side surface) of the liquid crystal display device 10.

  As described above, the buffer member 18 needs to be disposed so as not to cause a gap with respect to the back cover 6 in order to prevent light leakage into the camera and entry of dust and dirt into the surface of the liquid crystal display element. There is. For this reason, the buffer member 18 comes into contact with the back cover 6 while being urged in consideration of the dimensional variation of each component, the pasting error of the buffer member 18, and the like. Therefore, as the material of the buffer member 18, a flexible material such as a compressed urethane material or a rubber sheet is suitably used.

  On the other hand, when the buffer member 18 made of a flexible material is attached to the liquid crystal display device 10, the workability is reduced when it is stretched by adjusting the force and the length does not match, or when it becomes wavy. there's a possibility that. For this reason, a PET material 19 (sheet material) is affixed in advance to the buffer member 18 only at a location where it is affixed to the liquid crystal display device 10. By using the PET material, the workability of attaching the buffer member 18 can be improved.

  Although the liquid crystal holder 16 of the present embodiment has a planar shape, the present invention is not limited to this. For example, the liquid crystal holder 16 may have a shape that covers the peripheral edge (side surface) of the liquid crystal display device 10. . In this case, the buffer member 18 can be attached to the entire circumference or at least a part of the peripheral edge (side surface) of the liquid crystal holder 16.

  FIG. 3 is an enlarged cross-sectional view of the digital single-lens reflex camera with the BB plane in FIG. 1 cut. FIG. 3 shows a detailed structure of the buffer member 18 around the flexible printed circuit board 12. The flexible printed circuit board 12 is connected to the liquid crystal display device 10 and is provided so as to protrude from one side of the side surface of the liquid crystal display device 10. The flexible printed board 12 is electrically connected to the liquid crystal display device 10 by being connected to a circuit board (not shown) provided inside the camera body 1.

  Of the buffer member 18 provided on the peripheral edge (side surface) of the liquid crystal display device 10, only the portion attached to one side (connection surface) from which the flexible printed circuit board 12 protrudes passes through the flexible printed circuit board 12. There is an opening 18a (hole). When the buffer member 18 is attached to the liquid crystal display device 10, the flexible printed board 12 is passed through the opening 18 a of the buffer member 18 and attached to the connection surface (side surface) of the liquid crystal display device 10. With such a configuration, it is possible to substantially cover the entire periphery of the peripheral edge (side surface) of the liquid crystal display device 10.

  In the present embodiment, the buffer member 18 made of a single member can be used to surround the entire periphery of the peripheral portion of the liquid crystal display device 10. However, the present invention is not limited to this, and a plurality of independent members may be used and attached to each of the four sides (entire circumference) of the peripheral portion of the liquid crystal display device 10.

  FIG. 4 is an enlarged view of a portion C (dotted line portion) in FIG. 2, and shows the periphery of the contact portion between the back cover 6 and the buffer member 18. 4 (a) to 4 (c) show different modified examples of the contact portions. When the buffer member 18 falls to the liquid crystal display device 10 when the liquid crystal display device 10 is assembled into the back cover 6, the buffer member 18 is sandwiched between the back cover 6 and the liquid crystal display device 10. As a result, the compressive force of the buffer member 18 is applied to the liquid crystal display element 11 and the display image quality such as white unevenness and rainbow pattern is deteriorated. Each of the structures shown in FIGS. 4A to 4C is a modification for preventing the buffer member 18 from escaping to the outside of the liquid crystal display device 10 and falling to the liquid crystal display device 10 side.

  FIG. 4A is an example in which a tapered portion 6b (first tapered portion) is formed at the contact portion of the back cover 6 with which the buffer member 18 contacts. As shown in FIG. 4A, the tapered portion 6b is inclined so that its depth increases in the direction away from the liquid crystal display device 10 (the left direction in the drawing). For this reason, when the buffer member 18 comes into contact with the tapered portion 6b, which is the contact portion of the back cover 6, the buffer member 18 tilts away from the liquid crystal display device 10 as shown in FIG. Therefore, the buffer member 18 can be effectively prevented from falling toward the liquid crystal display device 10.

  FIG. 4B is a modification in which a recess 6 c is formed in the contact portion of the back cover 6 with which the buffer member 18 contacts. As shown in FIG. 4B, the buffer member 18 contacts the back cover 6 in the recess 6c. For this reason, it is possible to effectively prevent the buffer member 18 from falling toward the liquid crystal display device 10 due to the presence of the side wall around the recess 6c.

  FIG. 4C is a modification in which a tapered portion 18 b (second tapered portion) is formed at the tip end portion (contact portion) of the buffer member 18 that contacts the back cover 6. As shown in FIG. 4C, the tapered portion 18b is formed by cutting from the upper left to the lower right when viewed in a cross-sectional view. For this reason, the buffer member 18 abuts against the back cover 6 at the left side portion thereof, and can effectively prevent the buffer member 18 from falling toward the liquid crystal display device 10 disposed on the right side.

  In addition, although the structure of FIG. 4 (a)-(c) was demonstrated independently in the present Example, it is not limited to this, At least 2 of the structure of FIG. 4 (a)-(c) is combined. May be used.

  As described above, the buffer member of the present embodiment is provided on the side surface of the liquid crystal display device and is not disposed on the display surface of the liquid crystal display device. For this reason, according to the present embodiment, it is possible to provide an electronic apparatus that effectively suppresses the entry of dust, dust, and the like into the surface of the liquid crystal display element without degrading the image quality.

  The embodiment of the present invention has been specifically described above. However, the present invention is not limited to the matters described as the above-described embodiments, and can be appropriately changed without departing from the technical idea of the present invention. In this embodiment, the case of a digital camera as an electronic device has been described. However, the present embodiment can also be applied to other electronic devices including a liquid crystal display device such as a video camera.

6 Back cover 7 Protective cover 10 Liquid crystal display device 16 Liquid crystal holder 18 Buffer member

Claims (6)

A housing with an opening;
A liquid crystal display device disposed inside the opening of the housing;
A display window that covers the opening of the casing so as to face the display surface by providing a gap between the display surface of the liquid crystal display device;
A holding unit that supports the back surface of the liquid crystal display device and is fixed to the housing;
An electronic apparatus comprising: a buffer member provided on a side surface of the liquid crystal display device or the holding portion and abutting against an inner wall of the housing. The liquid crystal display device includes a flexible printed circuit board connected to a liquid crystal display element and provided so as to protrude from one side of the side surface of the liquid crystal display device,
2. The electronic device according to claim 1, wherein a hole for passing the flexible printed board is formed in a portion of the buffer member attached to the one side from which the flexible printed board protrudes. The inner wall of the housing is formed with a first taper portion that is inclined so that the depth increases in a direction away from the liquid crystal display device,
The electronic apparatus according to claim 1, wherein the buffer member is in contact with the first tapered portion. A recess is formed in the inner wall of the housing,
The electronic apparatus according to claim 1, wherein the buffer member abuts on the concave portion. A second tapered portion is formed at the tip of the buffer member,
The electronic apparatus according to claim 1, wherein the buffer member abuts on the inner wall of the housing at the second tapered portion.   The electronic apparatus according to claim 1, wherein the buffer member is attached to the side surface of the liquid crystal display device or the holding unit via a sheet material.