JP2018101090A - Display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a frame width of a display while ensuring support strength of a protective plate bonded to a display panel.SOLUTION: A display comprises: a display panel; a protective plate that is made of a transparent material and joined to a front face of the display panel; and a support member that supports the display panel with a panel joint surface joined to a peripheral part of a rear face of the display panel.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a display device having a display panel provided with a protective plate on the front surface.

In recent years, display devices using various display panels such as liquid crystal panels, plasma display panels, organic EL panels, and field emission display panels have been developed.
Accordingly, a structure has been proposed in which a transparent plate (protective plate) such as glass is bonded to the surface of the display panel in order to ensure the strength of the display panel of the display device and protect the display surface (Patent Document 1). .
In such a structure, a method has been adopted in which the protective plate is supported by adhering the peripheral portion of the protective plate to a support member provided at the edge portion of the display device.

JP 2012-34289 A

However, in order to support the protective plate with sufficient strength, a sufficient adhesion area is required between the protective plate and the support member, and therefore the width of the edge portion of the display device is widened.
Miniaturization is progressing in many display devices from small size such as portable terminal devices to large size such as TV. There is also a demand for a display panel with a narrow frame in terms of design. In order to reduce the size of the display device and improve the design, a narrow frame of the display device is required.
Therefore, an object of the present invention is to narrow the frame of a display device while ensuring the supporting strength of a protective plate joined to a display panel.

  A first aspect of the present invention is a support member that supports the display panel by a display panel, a protective plate bonded to the surface of the display panel, and a panel bonding surface bonded to a peripheral edge of the back surface of the display panel. And a display device characterized by comprising:

  According to the present invention, it is possible to realize a narrow frame of the display device while ensuring the support strength of the protective plate joined to the display panel.

It is a figure which shows the example of the hierarchical structure of a display apparatus. It is a figure which shows the example of a bottom view at the time of attaching a protection board to a display panel. 1 is a cross-sectional view of a display device according to Example 1. FIG. 10 is a cross-sectional view of a display device according to Example 2. FIG. FIG. 10 is a diagram illustrating a cross-sectional view according to a modified example of the second embodiment. 6 is a cross-sectional view of a display device according to Example 3. FIG. The example of sectional drawing of the conventional display apparatus is shown.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In each drawing, the same components are denoted by the same reference numerals in principle, and redundant description is omitted. Further, numerical values and the like exemplified for embodying the description are not limited to these unless otherwise specified.
Further, the present invention is not limited to the following embodiments, and can be appropriately changed without departing from the gist thereof. For example, the present invention may be appropriately modified or changed depending on the configuration of the apparatus to which the present invention is applied and various conditions.

<Example 1>
Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
(Overall configuration of display device)
FIG. 1 is a diagram illustrating an example of a hierarchical structure of the display device 100.
The display device 100 includes a display panel 1, a protection plate 2, a support member 3, a backlight unit 4, a chassis member 5, a circuit board 6, and an exterior member 7.

The display panel 1 is a liquid crystal display panel or the like. For example, a liquid crystal display panel includes a color filter substrate and a glass substrate on which a thin film device such as a TFT substrate is formed. An FPC (Flexible Printed Circuits) 8 for driving the liquid crystal display panel is provided on the outer periphery of the liquid crystal display panel. The FPC 8 is configured to protrude from the peripheral edge of the display panel 1. In addition, you may use display panels, such as organic EL (electroluminescence) and plasma, as the display panel 1, In that case, the backlight unit 4 mentioned later is unnecessary.

The protection plate 2 is joined to the surface side of the display panel 1. For example, the protective plate 2 may be attached to the surface side of the display panel 1 with an adhesive or a double-sided tape. Here, the surface of the display panel 1 is a surface on the side where the user views an image displayed on the display panel 1, and the back surface is a surface on the back side. In this embodiment, the term “joining” refers to bonding two members together with an adhesive or a double-sided tape.
The protection plate 2 covers the entire image display area of the display panel 1. Further, the outer dimension of the protective plate 2 is larger than the outer dimension of the display panel 1. For this reason, when the protective plate 2 is affixed to the display panel 1, the peripheral edge of the protective plate 2 is in a state of protruding uniformly outward from each side of the display panel 1.
The protection plate 2 has a thickness that can withstand impacts from the surface and twisting of the housing. As a material of the protection plate 2, for example, a transparent material plate such as glass or acrylic resin is used.
Further, the protective plate 2 may be provided with an antireflection film (antireflection film) and a protective coating.

The support member 3 is a member that is joined to the peripheral edge of the protection plate 2 and the peripheral edge of the display panel 1. The FPC 8 may partially protrude in a direction parallel to the surface of the display panel 1. In such a case, the support member 3 has a shape that avoids the protruding portion of the FPC 8. In addition, the specific example of the shape which avoids FPC8 of the supporting member 3 is demonstrated in Example 3. FIG.
The support member 3 is made of a metal or a resin material.

The support member 3 has a mounting hole 3h to which a screw or rivet can be attached. The backlight unit 4 or the exterior member 7 is fixed to the mounting hole 3h by screws, rivets or the like.
The display panel 1 and the protective plate 2 are fixed to the support member 3 with sufficient strength so that the display panel 1 and the protective plate 2 are not peeled off from the backlight unit 4 or the exterior member 7 due to external forces such as vibration during transportation and unexpected collision. Further, a plurality of support members 3 may be provided on the peripheral edge portion of the protection plate 2.

The backlight unit 4 is disposed on the back side of the display panel 1 and includes a light source substrate including a light source such as a CCFL (Cold Cathode Fluorescent Lamp) or an LED (Light Emitting Diode). Further, the backlight unit 4 includes a plurality of optical sheets and a backlight chassis that houses them. The display panel 1 is illuminated by the backlight unit 4. The backlight unit 4 may use either a direct type or an edge light type backlight system, or may use a backlight system other than these.

The circuit board 6 is fixed to the back surface of the backlight unit 4 by a chassis member 5 made of a sheet metal member. The circuit board 6 performs drive control and power supply for the display panel 1 and the backlight unit 4.
The chassis member 5 is provided with a fan (not shown) used for cooling heat generated by driving the display device 100, an operation switch board (not shown) for operating the display device 100 by the user, and the like. May be.
The exterior member 7 covers the back surface portion of the display device 100 and functions as an enclosure. The exterior member 7 is made of a material such as synthetic resin or metal.

FIG. 2 is a diagram illustrating an example of a bottom view when the protective plate 2 is attached to the display panel 1. The front display panel 1 in FIG. 2 is joined to the support member 3. Further, the back side protection plate 2 is joined to the same support member 3. That is, the support member 3 has a surface that is bonded only to the display panel 1 and a surface that is bonded only to the protective plate 2. A plurality of support members 3 are joined to each side of the display panel 1 and the protection plate 2. For example, as shown in FIG. 2, the lower sides of the display panel 1 and the protection plate 2 are joined to the two support members 3, and the left sides of the display panel 1 and the protection plate 2 are connected to the three support members 3 that are smaller than the lower sides. Be joined.
Further, since the outer dimension of the protective plate 2 is larger than the outer dimension of the display panel 1, the peripheral edge of the protective plate 2 is in a state of protruding uniformly from each side of the display panel 1.

The display panel 1 and the protection plate 2 are joined and fixed to a plurality of support members 3 on the top, bottom, left, and right. In addition, a resin adhesive is filled in a portion where the display panel 1 and the protection plate 2 overlap, and the entire overlapping portion is bonded.
In addition, there is an FPC 8 that protrudes from the display panel 1 in a direction parallel to the surface of the display panel 1 in the upward direction, the left direction, and the right direction in FIG. The support member 3 is provided so as to avoid the protruding portion of the FPC 8.

The support member 3 may have a slit for avoiding the protruding portion of the FPC 8.
Moreover, when providing the some support member 3 in the peripheral part of the display panel 1, you may avoid the part of FPC8 which protrudes and may provide each support member 3. FIG.
A display panel drive substrate 9 is provided on the upper side of the display panel 1.
Hereinafter, the layer structure of the display device 100 will be described with reference to a cross-sectional view corresponding to the portion AA ′ in FIG. 2.

(Cross sectional view of Example 1)
FIG. 3 is a cross-sectional view of the display device according to the first embodiment. 3 is a cross-sectional view corresponding to the portion AA ′ in FIG.
The protective plate 2 is attached to the surface side of the display panel 1 by the display surface adhesive layer 10. The display surface adhesive layer 10 is provided in a region where an image of the display panel 1 is displayed and a region from the edge of the image display region to the peripheral portion of the display panel 1. Hereinafter, an area where an image of the display panel 1 is displayed is referred to as an image display area. An area for adhering the protective plate 2 from the edge of the image display area and the edge of the display panel 1 to the peripheral edge of the display panel 1 is referred to as a protective plate adhesion area. For the display surface adhesive layer 10, for example, a resin adhesive such as an OCA (Optically Clear Adhesive) film and an OCR (Optically Clear Resin) is used, but other adhesives may be used.

The support member 3 has a protective plate bonding surface 3 f for supporting the protective plate 2 and a panel bonding surface 3 g for supporting the display panel 1. A step is provided between the protective plate bonding surface 3f and the panel bonding surface 3g. The protective plate bonding surface 3f of Example 1 is an example of a back surface bonding surface.
The panel bonding surface 3 g is a surface that supports the peripheral edge of the display panel 1. The support member 3 supports the display panel 1 by bonding the back surface of the peripheral edge portion of the display panel 1 with the support portion adhesive layer 12 provided on the panel bonding surface 3g. Here, the support part adhesive layer 12 is a layer that adheres the support member 3 and the display panel 1. The support part adhesive layer 12 is, for example, an adhesive or a double-sided tape.

The protective plate bonding surface 3 f is a surface that supports the protective plate 2. When the display panel 1 is placed on the panel bonding surface 3g, the protective plate bonding surface 3f is positioned on a surface that is substantially the same height as the surface of the display panel 1 and outside the periphery of the display panel 1. .
The support member 3 supports the protection plate 2 by a support portion adhesive layer 11 provided on the protection plate bonding surface 3f. Furthermore, the protective plate 2 is supported also in the protective plate adhesion region on the surface of the display panel 1 placed on the panel bonding surface 3g. Here, the support part adhesive layer 11 is a layer that bonds the protective plate 2 and the support member 3 together. The support part adhesive layer 11 is, for example, an adhesive or a double-sided tape.
Moreover, when it sees from the surface side of the display panel 1, a protection board adhesion | attachment area | region and the panel bonding surface 3g overlap partially. The overlapping portion corresponds to the adhesive region overlapping portion in FIG.

  The support part adhesive layer 11 and the support part adhesive layer 12 are provided in an area from the edge of the image display area of the display panel 1 to the periphery of the protection plate 2. Below, the area | region for adhere | attaching the display panel 1, the protective plate 2, and the support member 3 is called support member adhesion | attachment area | region.

The right end B of the support member adhesion region corresponds to the one-dot chain point B in FIG. Therefore, the width from the alternate long and short dash point B in FIG. 2 to the periphery of the holding plate 2 corresponds to the support member adhesion region in FIG. 3.
Also, the right end C of the frame width in FIG. 3 corresponds to the dotted line C in FIG. Therefore, the width from the dotted line C in FIG. 2 to the peripheral edge of the holding plate 2 corresponds to the frame width in FIG. The same applies to Example 2 and Example 3.

  The thickness of the display surface adhesive layer 10, the support part adhesive layer 11, and the support part adhesive layer 12 is set to an optimum thickness in consideration of the adhesive strength and the time required for adhesion. Therefore, it is desirable that the support member 3 is provided with steps corresponding to the thicknesses of the display panel 1, the display surface adhesive layer 10, the support part adhesive layer 11, and the support part adhesive layer 12.

  For example, the protective plate bonding surface 3f and the panel bonding surface 3g of the support member 3 protect the surface of the display panel 1 when the display panel 1 is placed on the panel bonding surface 3g via the support adhesive layer 12. The level difference is such that it is located on a surface having the same height as the plate bonding surface 3f. Thereby, the surface of the display panel 1 functions as an extension of the protective plate bonding surface 3 f, and the protective plate 2 is supported by the support member 3 through the surface of the display panel 1.

In the above description, the display panel is placed on the panel bonding surface 3g of the support member 3. However, the present invention is not limited to this. For example, the support member 3 may have a shape in which a groove portion is provided at a step portion between the protective plate bonding surface 3f and the panel bonding surface 3g so that the display panel 1 can be fitted. That is, a groove is provided in the support member 3 installed on the left side of the display panel 1 and the support member 3 installed on the right side. Each support member 3 may have a groove portion that allows the display panel 1 to be fitted into the left and right support members 3 from above.
Moreover, for the support part adhesive layer 11 and the support part adhesive layer 12, for example, a resin adhesive such as an epoxy resin and a double-sided tape are used, but other adhesive means may be used.

In Example 1, the support member 3 includes the protective plate bonding surface 3f and the panel bonding surface 3g, but is not limited thereto. The support member 3 may have only the panel joint surface 3g. In this case, the protective plate 2 has substantially the same outer dimensions as the display panel 1, and the protective plate 2 does not protrude from the peripheral edge of the display panel 1 when viewed from the back side of the display panel.
The support member 3 supports the protection plate 2 indirectly via the display panel 1. That is, the support member 3 and the protective plate 2 are not directly bonded. Thereby, the frame width can be further narrowed.

(effect)
As described above, the support member adhesion region for supporting the protection plate 2 is also provided outside the image display region of the display panel 1. That is, the support member 3 indirectly supports the protection plate 2 via the display panel 1 by the panel bonding surface 3g. Thereby, even if the protective plate joint surface 3f provided on the peripheral edge of the protective plate 2 is reduced, it is possible to secure a bonding area necessary for holding the protective plate 2 and the display panel 1. For this reason, the frame width of the display device 100 can be reduced.

  Moreover, the area | region corresponding to the panel bonding surface 3g of the protection board adhesion area | region mentioned above and a support member adhesion | attachment area | region is arrange | positioned in the overlapping position seeing from the display surface perpendicular | vertical direction of the display panel 1. FIG. That is, the display panel 1 is sandwiched between the protective plate 2 and the panel bonding surface 3g of the support member 3 at the adhesive region overlapping portion. Thereby, even when a load is applied from the surface of the support member 3 or the protection plate 2, deformation at the peripheral edge of the display panel 1 can be suppressed to be small.

Hereinafter, effects of the display device 100 according to the first embodiment compared with the conventional example will be described.
FIG. 7 shows an example of a cross-sectional view of a conventional display device. A protective plate 102 is attached to the front surface side of the display panel 101 with a display surface adhesive layer 110. The protection plate 102 covers the entire image display area of the display panel 101. Further, the outer dimension of the protective plate 102 is larger than the outer dimension of the display panel 101. The display surface adhesive layer 110 is formed on the entire surface of the image display area of the display panel 101 using a resin adhesive such as an OCA film and OCR.

  The peripheral portion of the protection plate 102 is bonded to the protection plate bonding surface 103 f of the support member 103 by the holding portion adhesive layer 111. The support member 103 is made of a metal or a resin material. A mounting hole 103h is provided in the support member 103, and the holding plate 102 is fixed to the housing of the display device with screws or rivets. For the support adhesive layer 111, a resin adhesive such as an epoxy resin or a double-sided tape is used.

  In the display device of the conventional example, the display panel 101 and the protection plate 102 are supported only by the protection plate bonding surface 103 f of the support member 103. For this reason, in order to support the protection plate 102 with sufficient strength, it is necessary to increase the width of the protection plate joint surface 103f. For this reason, it was difficult to narrow the frame width.

In contrast, in the display device 100 according to the first embodiment, the display panel 1 is supported by the panel bonding surface 3g. Further, the protective plate 2 is supported by the support member 3 indirectly through the display panel 1.
For this reason, even if the width of the protective plate bonding surface 3f is reduced, the display device 100 can support the display panel 1 and the protective plate 2 with sufficient strength.
For example, when the width of the conventional protective plate bonding surface 103f is 10, even if the width of the protective plate bonding surface 3f of Example 1 is 4 and the width of the panel bonding surface 3g is 6, the same strength as the conventional example Thus, the display panel 1 and the protective plate 2 can be supported.

<Example 2>
Hereinafter, Example 2 according to the present invention will be described with reference to the drawings.
(Cross sectional view of Example 2)
FIG. 4 is a cross-sectional view of the display device according to the second embodiment.

The protective plate 2 ′ is attached to the surface side of the display panel 1 by the display surface adhesive layer 10 ′. The protection plate 2 ′ covers the entire image display area of the display panel 1.
The display surface adhesive layer 10 ′ is provided in the image display region of the display panel 1 and the protective plate adhesion region from the outside to the peripheral edge of the display panel 1.

As shown in FIG. 4, the support member 3 ′ of Example 2 has a U-shape, and includes a protective plate bonding surface 3 f, a side surface bonding surface 3 i, and a panel bonding surface 3 g.
The protection plate joining surface 3f of the support member 3 ′ is joined to the peripheral portion of the surface of the protection plate 2 ′ by the support portion adhesive layer 11 ′. In the first embodiment, the support member 3 has a protective plate bonding surface 3f on the back surface of the protective plate 2, whereas in the second embodiment, the support member 3 'has a protective plate bonding surface 3f on the surface of the protective plate 2'. It is different in having. In the second embodiment, the protective plate 2 ′ has the same outer dimensions as the display panel 1. The protective plate bonding surface 3f of Example 2 is an example of a surface bonding surface.

  Further, the support member 3 ′ has a side surface bonding surface 3 i at a position where it is bonded to the side surface of the display panel 1 and the side surface of the protective plate 2 ′. The side surface portion of the protection plate 2 ′ and the side surface joint surface 3 i are joined by the support portion adhesive layer 13. As a result, the protective plate 2 ′ has a structure that is difficult to shift laterally.

Further, the panel bonding surface 3g of the support member 3 ′ is bonded to the peripheral edge portion of the back surface of the display panel 1 by the support portion adhesive layer 12 ′.
Further, the thickness of the display surface adhesive layer 10 ′, the support part adhesive layer 11 ′, and the support part adhesive layer 12 ′ is set to an optimum thickness in consideration of the adhesive strength and the time required for adhesion. Specifically, the display surface adhesive layer 10 ′, the support part adhesive layer 11 ′, and the support part adhesive layer 12 ′ are sandwiched between the peripheral portions of the display panel 1 and the protective plate 2 ′ with an appropriate strength of the support member 3 ′. It is good also as a thickness of a certain.

(effect)
Thus, the support member 3 has a U-shape, and supports the display panel 1 and the protection plate 2 ′ while being sandwiched between the protection plate joining surface 3f and the panel joining surface 3g.
Thereby, even if the frame width is narrowed, the protective plate 2 'can be supported with sufficient strength. Moreover, since the supporting member 3 supports the peripheral part of the protective plate 2 from the surface of the protective plate 2, it can be set as the structure which is hard to peel off protective plate 2 '.

Further, since the protective plate bonding surface 3f is the peripheral edge portion of the front surface of the protective plate, the outer dimension of the protective plate 2 'becomes substantially the same as the outer dimension of the display panel 1, thereby reducing the size of the display device 100. Also contribute.
Moreover, the area | region corresponding to the panel bonding surface 3g of the protection board adhesion area | region mentioned above and a support member adhesion | attachment area | region is arrange | positioned in the overlapping position seeing from the display surface perpendicular | vertical direction of the display panel 1. FIG. That is, the peripheral portion of the display panel 1 is sandwiched between the peripheral portion of the protective plate 2 ′ and the panel joint surface 3 g of the support member 3. Thereby, even when a load is applied from the surface of the support member 3 ′ or the protective plate 2 ′, deformation at the peripheral edge of the display panel 1 can be suppressed to a small level.

(Modification of Example 2)
FIG. 5 is a cross-sectional view according to a modification of the second embodiment. As described above, the support member 3 ′ has a structure that supports the display panel 1 and the protection plate 2 ′ while being sandwiched between the protection plate joining surface and the panel joining surface. The support member 3 ′ is provided with a slit 3 </ b> S in the vicinity of the FPC 8 so as not to contact the FPC 8 partially protruding from the peripheral edge of the display panel 1.

In addition, as an example which deform | transforms shape of support member 3 ', it is not limited to the case of FPC8. If the structure in which the display panel 1 and the protective plate 2 ′ are sandwiched between the protective plate bonding surface and the panel bonding surface of the support member 3 is maintained, the support member 3 may be deformed in another shape.
Further, the support member 3 ′ may not have the slit 3S. For example, the support member 3 ′ is provided at the peripheral portion of the display panel 1 and the protective plate 2 ′ while avoiding the portion where the FPC 8 protrudes from the display panel 1. May be.
As described above, the display panel 1 and the protective plate 2 ′ are sandwiched between the protective plate bonding surface and the panel bonding surface of the support member 3. As shown in FIG. 5, the protection plate 2 ′ can be supported with sufficient strength even if the shape of a part of the support member 3 ′ is deformed from the surface according to the structure of the display panel 1.

<Example 3>
A third embodiment according to the present invention will be described below with reference to the drawings.
(Cross sectional view of Example 3)
FIG. 6 is a cross-sectional view of the display device according to the third embodiment. 6 is a cross-sectional view corresponding to the portion AA ′ of FIG.
The structure of the support member 3 ″ of the third embodiment has a panel joint surface 3g and a protective plate joint surface 3f as in the support member 3 of the first embodiment. The support member adhesion region and the protection plate adhesion region are also implemented. Similar to Example 1.

The third embodiment is different from the first embodiment in that a screw is engaged with the mounting hole 3h of the support member 3 ″, and the backlight frame member 4f is attached to the support member 3 by the screw. Is deeply engaged with the mounting hole 3h, so that the supporting member 3 ″ can be fixed to the backlight unit 4 or the exterior member 7.
Although the example in which the backlight frame member 4f is attached to the attachment hole 3h of the support member 3 ″ with a screw has been described, the present invention is not limited to this. For example, the backlight frame member 4f is attached to the support member 3 ″ with an adhesive or a double-sided tape. You may join.
The support member 3 ″ may have another mounting hole different from the mounting hole 3h for fixing to the backlight unit 4 or the exterior member 7. The backlight unit 4 is an example of a light guide plate.

A gap 14 is provided between the backlight frame member 4f and the back surface of the panel joint surface of the support member 3 ″. The gap 14 accommodates the optical sheet 4s.
A cushion member 4c is filled between the optical sheet 4s and the back surface of the panel bonding surface and between the optical sheet 4s and the backlight frame member 4f. The cushion member 4c is, for example, a tape, a rubber sheet, a foamed resin material, or the like. The cushion member 4c prevents the optical sheet 4s from being displaced laterally, and fixes the optical sheet 4s so that the optical sheet 4s is not damaged by rubbing with the backlight frame member 4f.
Thus, the support member 3 supports the display panel 1, the protection plate 2, and the optical sheet 4s, so that the number of parts can be reduced.

1: Display panel 1, 2: Protection plate 2, 3: Support member 3, 4: Mounting hole 3h, 5: Display surface adhesive layer 10, 6: Support part adhesive layer 11, 7: Support part adhesive layer 12

Claims (7)

A display panel;
A protective plate bonded to the surface of the display panel;
And a support member that supports the display panel by a panel bonding surface bonded to a peripheral edge portion of the back surface of the display panel.   2. The display device according to claim 1, wherein when viewed from the front surface side of the display panel, the panel bonding surface and a portion of the protective plate bonded to the display panel overlap each other. . The protective plate has an end protruding outside the display panel,
The display device according to claim 1, wherein the support member further includes a back surface bonding surface bonded to a back surface of the end portion of the protection plate, and supports the protection plate.   The support member includes a surface bonding surface bonded to a peripheral edge portion of the surface of the protection plate, and supports the protection plate and the display panel in a state of being sandwiched by the surface bonding surface and the panel bonding surface. The display device according to claim 1, wherein the display device is a display device. The display panel has a substrate protruding in a direction parallel to the surface of the display panel,
The display device according to claim 1, wherein the support member has a slit in the vicinity of the substrate so as not to contact the substrate. A light guide plate for supplying light to the display panel;
The display device according to claim 1, wherein the support member supports a light guide plate on a back surface of the panel bonding surface.   The display device according to claim 6, wherein the support member supports the light guide plate by sandwiching the light guide plate between a back surface of the panel joint surface and a frame member engaged with the support member.

Images