JP2008052039A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent decrease in rigidity of a frame member in a display device in which a display panel is supported by two frame members comprising a plurality of support bodies assembled into a frame form. <P>SOLUTION: The display device has a first frame member in a frame form supporting a display panel through the display screen side of the panel, and a second frame member in a frame form supporting the display panel through the back face side of the display screen of the panel. Each of the first frame member and the second frame member is composed of a plurality of support bodies divided at corners: in a first corner of the first frame member, a first support body extended from the first corner in a first direction and a second support body extending in a second direction different from the first direction are separated by a plane along the first direction; in a corner of the second frame member superposing the above first corner in a plan view, a third support body extended in the first direction from the corner and a fourth support body extending in the second direction are separated by a plane along the second direction. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a display device, and more particularly to a technique effective when applied to a display device in which two frame-shaped frame members that support a display panel are each composed of a frame member in which a plurality of supports are assembled in a frame shape. Is.

  Conventionally, a liquid crystal display device is used as a display device such as a television or a display for a personal computer (PC).

  The liquid crystal display device includes a liquid crystal display panel in which a liquid crystal material is sealed between a pair of substrates, and includes a liquid crystal display panel and a printed circuit board that generates a signal such as an image or an image to be displayed on the liquid crystal display panel. The frame member is integrally supported. In the case of a transmissive or transflective liquid crystal display device, a light source called a backlight unit is disposed behind (behind) the liquid crystal display panel as viewed from the observer, and the backlight unit also includes the liquid crystal display. It is integrally supported by the frame member together with a panel or the like.

  In the liquid crystal display device, when the liquid crystal display panel is supported using the frame member, for example, a frame-shaped first frame member (generally called an upper frame) disposed on the display surface side of the liquid crystal display panel; A frame-shaped second frame member (generally referred to as an intermediate frame or a mold frame) disposed on the back side of the display surface is supported so as to sandwich the outer peripheral portion of the display panel. At this time, for example, the second frame member has a portion facing the cut end surface (outer peripheral end surface) of the liquid crystal display panel.

  The first frame member is generally formed of metal, and is formed by punching and bending a single metal plate into a frame shape, or a single long metal plate in one direction. What was bent and shape | molded in the shape of a frame was used. Further, the second frame member has been conventionally formed using plastic (resin) and has been formed into a frame shape by injection molding using a mold.

  However, if the first frame member or the second frame member of a large-sized liquid crystal display device such as a liquid crystal television is formed by the above method, the manufacturing cost increases or the frame member is deformed due to a dimensional error. However, the display quality of the liquid crystal display panel is adversely affected.

  Thus, for a large-sized liquid crystal display device such as a liquid crystal television, for example, a method has been proposed in which a plurality of supports are assembled into a frame to form one frame member (see, for example, Patent Document 1). In the method described in Patent Document 1, a metal frame (first frame member) is divided into four frame bodies (support bodies) for each of the upper, lower, left and right sides (end sides) of the display panel, and each frame body is divided. Are connected at the corner (corner) to form a frame.

JP 2003-344826 A

  However, in the case of the method described in Patent Document 1, the strength against impact is low at the corner portion connecting the two frames of the metal frame (first frame member). There is a problem that the connecting portion of the two frames is opened due to vibration or the like generated in the case or the display device is twisted.

  Such a problem is likely to occur when, for example, the second frame member is divided into a plurality of frames (supports) together with the first frame member.

  That is, in the conventional display device, when the display panel is supported by two frame members in which a plurality of supports are assembled in a frame shape, the rigidity of each frame member is low, and the display panel is not supported sufficiently and wobbles. There was a problem of twisting.

  An object of the present invention is to provide a technique capable of preventing a decrease in rigidity of a frame member in a display device that supports a display panel with two frame members in which a plurality of supports are assembled in a frame shape.

  The above and other objects and novel features of the present invention will be apparent from the description of this specification and the accompanying drawings.

  The outline of typical inventions among the inventions disclosed in the present application will be described as follows.

  (1) a display panel, a frame-shaped first frame member that supports the outer peripheral portion of the display panel from the display surface side of the display panel, and an outer periphery of the display panel from the back surface side of the display surface of the display panel A frame-shaped second frame member that supports a frame portion, wherein each of the first frame member and the second frame member includes a plurality of support bodies divided at corners. And the first corner of the first frame member extends in a second direction different from the first direction, and a first support extending from the first corner in the first direction. The second support is divided by a dividing surface along the first direction, and the corner of the second frame member overlaps the first corner of the first frame member as seen in a plane. A third support extending in the first direction from the corner, and the second support Fourth support member extending in a direction and is, the second display is divided by the dividing plane along the direction device.

  (2) In the display device according to (1), the second support member of the first frame member overlaps a split surface with the first support member when viewed in plan with the first support member. The first support body and the second support body, and the fourth support body of the second frame member have a fixing portion, and the first support body and the second support body are A display device that is screwed and fixed in a region where the fixed part overlaps with a fixed portion.

  (3) The display device according to (1) or (2), wherein the display panel is a liquid crystal display panel.

  According to the display device of the present invention, the external force that is easily opened or twisted at the divided surfaces of the two supports divided by the corners of the first frame member, that is, at the portion where the two supports are connected. And the direction of external force that easily opens or twists on the split surfaces of the two supports of the second frame member. Therefore, for example, when an external force that opens or twists the two supports on the split surface of the first frame member is applied, the support of the second frame member that intersects the split surface of the first frame member Thereby, it can suppress that the division | segmentation surface of a 1st frame opens or twists. As a result, it is possible to prevent a decrease in rigidity due to the division of each frame member into a plurality of supports.

  In addition, it is desirable that the second support of the first frame member is provided with a fixing portion that overlaps the first support in a plan view on a split surface with the first support. At this time, the first support body, the second support body, and the fourth support body of the second frame member include the first support body and a fixing portion of the second support body. It is desirable to fix by screwing in a region where they overlap when viewed in a plane.

  According to another aspect of the present invention, there is provided a first frame member in which a plurality of supports are assembled in a frame shape, and a second frame member in which another plurality of supports are assembled in a frame shape, and the outer peripheral portion of the display panel. The display device can be applied to any display device as long as the display device is supported so as to sandwich it. That is, in the present invention, the display panel may have any display format (drive format). As a display panel of a display device to which the present invention can be applied, for example, a liquid crystal display panel can be given.

Hereinafter, the present invention will be described in detail together with embodiments (examples) with reference to the drawings.
Note that components having the same function are denoted by the same reference symbols throughout the drawings for describing the embodiments, and the repetitive description thereof is omitted.

FIG. 1A is a schematic plan view showing an example of a schematic configuration of a liquid crystal display device according to an embodiment of the present invention. FIG. 1B is a schematic cross-sectional view showing an example of a cross-sectional configuration taken along line AA ′ in FIG.
FIG. 2A is a schematic plan view showing a schematic configuration of a mold frame in the liquid crystal display device of the present embodiment. FIG. 2B is a schematic plan view showing a schematic configuration of the upper frame in the liquid crystal display device of the present embodiment.

  The liquid crystal display device of the present embodiment is, for example, as shown in FIGS. 1A and 1B, a first liquid crystal display panel 1 and a first liquid crystal display panel 1 that supports an outer peripheral portion from the display surface 1a side. Frame member (hereinafter referred to as the upper frame) 2 and a second frame member (hereinafter referred to as the middle frame) 3 that supports the outer peripheral portion of the liquid crystal display panel from the back surface 1b side of the display surface 1a. The upper frame 2 and the middle frame 3 are screwed and fixed at a position different from the position of the A-A ′ line in FIG.

  At this time, for example, a cushion material 4 is interposed between the display surface 1 a of the liquid crystal display panel 1 and the upper frame 2, and a separate material is provided between the back surface 1 b of the liquid crystal display panel 1 and the middle frame 3, for example. The cushion material 5 is interposed. Although not shown, a cushion material integral with either another cushion material or cushion materials 4 and 5 is interposed between the cut end surface (outer peripheral end surface) of the liquid crystal display panel 1 and the middle frame 3. Sometimes.

  Further, the liquid crystal display device of the present embodiment is a transmissive liquid crystal display device. For example, the fluorescent tube 6, the reflection plate 7, and the light diffusing plate are positioned at the rear (back side) of the liquid crystal display panel 1 as viewed from the observer. A backlight unit having an optical sheet 8 is disposed.

  At this time, the backlight unit is accommodated in, for example, a third frame member (hereinafter referred to as a lower frame) 9 which is formed in a substantially box shape. At this time, the lower frame 9 is bent so that, for example, the outer peripheral portion is in contact with the middle frame 3, and the middle frame 3 and the lower frame 9 are positioned at the line AA ′ in FIG. Screwed and fixed at different positions. Furthermore, the reflecting plate 7 and the optical sheet 8 are supported so that their outer peripheral portions are sandwiched between the middle frame 3 and the lower frame 9, and a cushion material 10 is interposed between the middle frame 3 and the optical sheet 8, for example. Intervene.

  In the liquid crystal display device according to the present embodiment, the middle frame 3 includes, for example, a first support 301 and a second support 302 that extend in the x direction, and a y direction as shown in FIG. The extending third support body 303 and fourth support body 304 are connected to form a frame shape. At this time, each support body is connected at a position corresponding to a corner (not shown) of the liquid crystal display panel 1. At this time, the connecting surface 3s of each support of the middle frame 3 is a plane parallel to the y direction. That is, in the present embodiment, the frame-shaped middle frame 3 is divided at four corners by a plane (connecting surface 3s) parallel to the y direction. Hereinafter, the connecting surface 3 s of each support 301, 302, 303, 304 constituting the middle frame 3 is referred to as a divided surface of the middle frame 3.

  Further, for example, as shown in FIG. 2B, the upper frame 2 also includes a first support body 201 and a second support body 202 extending in the x direction, and a third support body 203 and a second support body extending in the y direction. 4 support bodies 204 are connected to form a frame shape. At this time, each support body is connected at a position corresponding to a corner (not shown) of the liquid crystal display panel 1. However, the connection surface 2s of each support body of the upper frame 2 is a plane parallel to the x direction. That is, in the present embodiment, the frame-shaped upper frame 2 is divided at four corners by a plane parallel to the x direction (connecting surface 2s). Hereinafter, the connection surface 2 s of each support 201, 202, 203, 204 constituting the upper frame 2 is referred to as a divided surface of the upper frame 2.

  FIG. 3A is a schematic plan view illustrating an example of a specific configuration of a corner portion in the liquid crystal display device of the present embodiment. FIG. 3B is a schematic cross-sectional view showing an example of a cross-sectional configuration taken along line B-B ′ of FIG. FIG. 3C is a schematic cross-sectional view showing an example of a cross-sectional configuration taken along line C-C ′ of FIG.

  In the liquid crystal display device of the present embodiment, the configurations of the upper frame 2 and the middle frame 3 in the upper left corner area AR1 of the liquid crystal display device shown in FIG. 1A are, for example, FIG. 3A and FIG. The configuration shown in FIG. 3B and FIG. That is, the frame-shaped middle frame 3 is divided into a first support 301 and a third support 303 by a dividing surface 3s in the y direction, and the first frame is connected via the dividing surface 3s. On the support body 301 and the third support body 303, the first support body 201 of the upper frame 2 extends.

  The frame-shaped upper frame 2 is divided into a first support body 201 and a third support body 203 by a dividing surface 2s in the x direction, and the first frame 2s are connected via the dividing surface 2s. Under the support 201 and the third support 203, the third support 303 of the middle frame 3 extends.

  At this time, the third support body 203 of the upper frame 2 has a fixing portion 203a that protrudes from the dividing surface 2s and overlaps the first support body 201 of the upper frame 2 in a plan view. For example, the fixing portion 203a is bent at the position of the dividing surface 2s, and is interposed between the first support 201 of the upper frame 2 and the third support 203 of the middle frame 3. Further, screw holes (not shown) are respectively provided at positions where the first support 201 of the upper frame 2 and the fixing portion 203a of the third support 203 and the third support 303 of the middle frame 3 overlap in a plan view. Not). At this time, the first support 201 of the upper frame 2 and the fixing portion 203a of the third support 203 and the third support 303 of the middle frame 3 are, for example, screws 11 passed through the screw holes. It is fixed to the lower frame 9 with screws.

  Although not described in detail, the configurations of the upper frame 2 and the middle frame 3 at the other corners of the liquid crystal display device are the same as the configurations shown in FIGS. 3 (a) to 3 (c). It has become.

  Next, the operation and effect of the liquid crystal display device of this embodiment will be described. Before that, an example of the configuration of the middle frame 3 and the upper frame 2 in the conventional liquid crystal display device and an example of problems in the configuration will be described. explain.

FIG. 4A is a schematic plan view showing a schematic configuration of a mold frame in a conventional liquid crystal display device. FIG. 4B is a schematic plan view showing a schematic configuration of the upper frame in the conventional liquid crystal display device.
FIG. 5A is a schematic plan view showing an example of a specific configuration of a corner portion in a conventional liquid crystal display device. FIG.5 (b) is a schematic cross section which shows an example of the cross-sectional structure in the DD 'line of Fig.5 (a).

  In the conventional liquid crystal display device, when the middle frame 3 is divided into a plurality of supports, for example, as shown in FIG. 4A, the first frame is divided at four corners and extends in the x direction. It is divided into a support body 301 and a second support body 302, and a third support body 303 and a fourth support body 304 extending in the y direction. At this time, the dividing surface 3s of each support is the same as the liquid crystal display device of the present embodiment, and is a plane parallel to the y direction.

  Further, when the upper frame 2 is divided into a plurality of supports, for example, as shown in FIG. 4B, the upper frame 2 is divided at four corners and extends in the x direction. The second support 202 is divided into a third support 203 and a fourth support 204 extending in the y direction. However, in the case of a conventional liquid crystal display device, the dividing surface 2s of each support of the upper frame 2 is often the same plane as the dividing surface of the middle frame 3 and parallel to the y direction.

  In such a conventional liquid crystal display device, the configuration of the upper frame 2 and the middle frame 3 in the region corresponding to the region AR1 at the upper left corner of the liquid crystal display device shown in FIG. It becomes a structure as shown to a) and FIG.5 (b). In other words, the frame-shaped middle frame 3 is divided into the first support 301 and the third support 303 by the dividing surface 3s in the y direction, and the upper frame 2 is also divided by the first dividing surface 2s in the y direction. The support 201 and the third support 203 are divided.

  At this time, the first support body 201 of the upper frame 2 has a fixing portion 201a that protrudes from the dividing surface 2s and overlaps the third support body 203 of the upper frame 2 in plan view. The fixing portion 201a is bent, for example, at the position of the dividing surface 2s, and is interposed between the third support body 203 of the upper frame 2 and the third support body 203 of the middle frame 3. Then, at positions where the fixing portion 201a and the second support body 203 of the first support body 201 of the upper frame 2 and the third support body 303 of the middle frame 3 overlap in a plan view, respectively, screw holes (illustrated) are shown. Not). At this time, the fixing portion 201a and the third support body 203 of the first support body 201 of the upper frame 2 and the third support body 303 of the middle frame 3 are, for example, screws 11 passed through the screw holes. It is fixed to the lower frame 9 with screws.

  In such a conventional liquid crystal display device, when the liquid crystal display panel 1 is displaced in the −x direction due to vibration during transportation, for example, as shown in FIG. 5A, the left end of the liquid crystal display panel 1 is cut. The end surface comes into contact with the third support 303 of the middle frame 3 and an external force Fx is applied to the third support 303. At this time, since each of the supports 301, 302, 303, 304 constituting the middle frame 3 is divided by the dividing surface 3s in the y direction, the third frame 3 receiving the external force Fx from the liquid crystal display panel 1 is used. The support body 303 tends to move away from the first support body 301 and the second support body 302.

  At this time, the third support body 303 of the middle frame 3 is fixed to the first support body 201 and the third support body 203 of the upper frame 2 by screws 11 or the like. The support 203 is fixed only to the third support 303 among the supports constituting the middle frame 3. Further, the third support 203 of the upper frame 2 is divided from the first support 201 and the second support 202 of the upper frame 2 by a dividing surface in the y direction. Therefore, for example, if the split surface 2s of the first support 201 of the upper frame 2 has a bent portion as shown in FIG. 5B, an external force Fy is applied in a direction in which the bent portion extends, There is a problem that the third support 303 of the middle frame 3 is separated from the first support 301 and the second support 302 and spreads.

  On the other hand, in the liquid crystal display device of the present embodiment, when the liquid crystal display panel 1 is displaced in the −x direction due to vibration during transportation, for example, as shown in FIG. The cut end face at the left end of the second frame contacts the third support 303 of the middle frame 3, and an external force Fx is applied to the third support 303. Also at this time, since each support body 301, 302, 303, 304 constituting the middle frame 3 is divided by the dividing surface 3s in the y direction, the second frame of the middle frame 3 receiving the external force Fx from the liquid crystal display panel 1 is used. The third support body 303 tends to move away from the first support body 301 and the second support body 302.

  However, the third support 303 of the middle frame 3 is fixed with the first support 201 of the upper frame 2 and the screws 11, for example. At this time, the first support 201 of the upper frame 2 is also fixed to the first support 301 and the fourth support 304 of the middle frame 3 with screws, for example. Therefore, for example, the first support 301 of the middle frame 3 generates a force in the direction opposite to the external force Fx applied to the third support 303, and prevents the third support 303 from opening outward. it can.

  Further, for example, when the liquid crystal display panel 1 is displaced in the −y direction due to vibration during transportation, for example, as shown in FIG. 3A, the cut end surface of the upper end of the liquid crystal display panel 1 is the first of the middle frame 3. The external force Fy is applied to the first support 301 in contact with the first support 301. At this time, since each support 301, 302, 303, 304 constituting the middle frame 3 is divided by the dividing surface 3s in the y direction, the first of the middle frame 3 receiving the external force Fy from the liquid crystal display panel 1 is used. The support body 301 tends to move away from the third support body 303 and the fourth support body 304.

  However, the first support 301 of the middle frame 3 is fixed to the first support 201 of the upper frame 2 with screws, for example. At this time, the first support 201 of the upper frame 2 is fixed to the third support 303 and the fourth support 304 of the middle frame 3 with the screws 11, for example. Therefore, the third support 303 and the fourth support 304 of the middle frame 3 are opposite to, for example, the external force Fy applied to the first support 301 of the middle frame 3 and the first support 201 of the upper frame 2. Directional force is generated, and the first support 301 can be prevented from opening outward.

  As described above, according to the liquid crystal display device of the present embodiment, the direction of the dividing surface 2s of the upper frame 2 and the direction of the dividing surface 3s of the middle frame 3 are substantially orthogonal to each other so that each frame member has a plurality of frame members. It is possible to prevent a decrease in rigidity due to the division into the support. Therefore, the support of the display panel is insufficient, and it is possible to prevent wobbling or twisting.

  The present invention has been specifically described above based on the above-described embodiments. However, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention. is there.

  For example, in the above-described embodiment, a transmissive or semi-transmissive liquid crystal display device including a direct-type backlight unit having a fluorescent tube 6, a reflector 7, and an optical sheet 8 is taken as an example. Of course, the structure may be called a side light type or an edge light type.

  In the above-described embodiment, a transmissive or transflective liquid crystal display device including a backlight unit has been described as an example. However, the present invention is not limited to this, and a reflective liquid crystal display device may be used. .

  Moreover, in the said Example, although the liquid crystal display device using the liquid crystal display panel 1 was mentioned, this invention is not restricted to a liquid crystal display device, Two picture frames arrange | positioned at the display surface side and its back surface side of a display panel. Of course, the present invention can be applied to any display device as long as the display panel is supported by a frame-shaped frame member and each frame member is composed of a plurality of supports. That is, the present invention can be applied to, for example, a self-luminous display device using a PDP (Plasma Display Panel) or an organic EL (ElectroLuminescence).

It is a schematic plan view which shows an example of schematic structure of the liquid crystal display device of one Example by this invention. It is a schematic cross section which shows an example of the cross-sectional structure in the A-A 'line of Fig.1 (a). It is a schematic plan view which shows schematic structure of the mold frame in the liquid crystal display device of a present Example. It is a schematic plan view which shows schematic structure of the upper frame in the liquid crystal display device of a present Example. It is a schematic plan view which shows an example of the concrete structure of the corner | angular part in the liquid crystal display device of a present Example. It is a schematic cross section which shows an example of the cross-sectional structure in the B-B 'line | wire of Fig.3 (a). FIG. 4 is a schematic cross-sectional view illustrating an example of a cross-sectional configuration taken along line C-C ′ in FIG. It is a model top view which shows schematic structure of the mold frame in the conventional liquid crystal display device. It is a model top view which shows schematic structure of the upper frame in the conventional liquid crystal display device. It is a schematic plan view which shows an example of the concrete structure of the corner | angular part in the conventional liquid crystal display device. It is a schematic cross section which shows an example of the cross-sectional structure in the D-D 'line | wire of Fig.5 (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Liquid crystal display panel 2 ... 1st frame member (upper frame)
3 ... Second frame member (medium frame)
201, 301 ... 1st support body 202, 302 ... 2nd support body 203, 303 ... 3rd support body 204, 304 ... 4th support body 2s, 3s ... Dividing surface (connection surface)
201a, 203a ... fixed portion 4, 5, 10 ... cushion material 6 ... fluorescent tube 7 ... reflector 8 ... optical sheet 9 ... third frame member (lower frame)
11 ... Screw

Claims (3)

A display panel, a frame-shaped first frame member that supports the outer peripheral portion of the display panel from the display surface side of the display panel, and an outer peripheral portion of the display panel that is supported from the back side of the display surface of the display panel A display device having a frame-shaped second frame member that
Each of the first frame member and the second frame member comprises a plurality of supports divided at corners,
The first corner of the first frame member includes a first support extending in the first direction from the first corner and a second extending in a second direction different from the first direction. And the support body are divided by a dividing surface along the first direction,
The corner portion of the second frame member that overlaps the first corner portion of the first frame member in a plan view has a third support extending in the first direction from the corner portion, and the second frame member. A display device, wherein a fourth support body extending in a direction is divided by a dividing surface along the second direction. The second support body of the first frame member has a fixing portion that overlaps the first support body in a plan view on a split surface with the first support body,
The first support and the second support, and the fourth support of the second frame member, the first support and the fixing portion of the second support are flat. The display device according to claim 1, wherein the display device is fixed with screws in the overlapping area.   The display device according to claim 1, wherein the display panel is a liquid crystal display panel.

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