Display device

Abstract

To provide a display that can make an appropriate configuration related to an adhesive to be applied.SOLUTION: A display according to an aspect of an embodiment comprises a housing, a display panel, a cover panel, a first adhesive, a part to be stored, a second adhesive, and a projection. The housing has an opening. The display panel is arranged at a position corresponding to the opening of the housing. The cover panel covers the front face side of the display panel. The first adhesive bonds the housing and the cover panel to each other. The part to be stored is arranged on the rear face side of the display panel and stored in the housing. The second adhesive bonds an outer peripheral part of the rear face of the display panel and the part to be stored. The projection is formed at a position corresponding to the second adhesive of at least one of the part to be stored and the display panel to project toward the other of the part to be stored and the display panel.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a display device. [Background technology]

[0002] BACKGROUND ART Various display devices have been proposed that include a display panel such as a liquid crystal panel and a backlight unit disposed on the rear side of the display panel (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-230402 Summary of the Invention [Problem to be solved by the invention]

[0004] In some display devices, the display panel and the backlight unit are bonded together with an adhesive. In such cases, the adhesive can prevent foreign matter such as dust from entering between the display panel and the backlight unit, thereby improving dust resistance.

[0005] However, the prior art leaves room for improvement in terms of providing an appropriate configuration for the adhesive to be applied.

[0006] The adhesive described above is not limited to bonding between a display panel and a backlight unit, but may also be used to bond, for example, a component housed in a housing of a display device, i.e., between a housing portion and a display panel.

[0007] The present invention has been made in view of the above, and has an object to provide a display device in which the structure relating to the adhesive to be applied can be made appropriate. [Means for solving the problem]

[0008] In order to solve the above problems and achieve the object, the present invention provides a display device comprising a housing, a display panel, a cover panel, a first adhesive, a contained portion, a second adhesive, and a protrusion. The housing has an opening. The display panel is arranged at a position corresponding to the opening of the housing. The cover panel covers the front surface side of the display panel. The first adhesive bonds the housing and the cover panel. The contained portion is arranged on the back side of the display panel and is housed in the housing. The second adhesive bonds the outer periphery of the back surface of the display panel to the contained portion. The protrusion is formed at a position corresponding to the second adhesive on at least one of the contained portion and the display panel so as to protrude toward the other of the contained portion and the display panel. [Effects of the Invention]

[0009] According to the present invention, the adhesive to be applied in the display device can be appropriately configured. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a front view of a display device according to an embodiment. [Figure 2] FIG. 2 is an exploded perspective view of the display device. [Figure 3] FIG. 3 is an end view taken along line III-III in FIG. [Figure 4] FIG. 4 is a rear view of the display panel to which the cover panel is joined. [Figure 5] FIG. 5 is an end view taken along line VV of FIG. [Figure 6] FIG. 6 is a front view of the frame of the backlight unit. [Figure 7] FIG. 7 is an enlarged cross-sectional view showing the vicinity of the second adhesive. [Figure 8A] FIG. 8A is a rear view of the display panel. [Figure 8B] FIG. 8B is a side view of the vicinity of the start point and end point of the second adhesive applied to the display panel. [Figure 9A]FIG. 9A is a rear view of a display panel according to a first modified example. [Figure 9B] FIG. 9B is a side view of the vicinity of the start point and end point of the second adhesive applied to the display panel according to the first modified example. [Figure 10A] FIG. 10A is a rear view of a display panel according to a second modified example. [Figure 10B] FIG. 10B is a side view of the vicinity of the start point and end point of the second adhesive applied to the display panel according to the second modified example. [Figure 11] FIG. 11 is an enlarged cross-sectional view showing the vicinity of the protrusion and the second adhesive according to the third modified example. [Figure 12] FIG. 12 is an enlarged cross-sectional view showing the vicinity of the protrusion and the second adhesive according to the fourth modification. [Figure 13] FIG. 13 is an enlarged cross-sectional view showing the vicinity of the protrusion and the second adhesive according to the fifth modification. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments of the display device disclosed in the present application will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described below.

[0012] <Embodiment> Fig. 1 is a front view of a display device according to an embodiment, and Fig. 1 and Fig. 2 and subsequent figures described below are all schematic diagrams.

[0013] 1 illustrates a three-dimensional Cartesian coordinate system defined by mutually orthogonal X-, Y-, and Z-axis directions for ease of understanding. Such Cartesian coordinate system may also be illustrated in other drawings used in the following explanation. The Cartesian coordinate system is the X-, Y-, and Z-axis directions when the display device 1 is in the state illustrated, and does not limit the mounting direction or arrangement direction of the display device 1.

[0014] As shown in FIG. 1, the display device 1 is a device used in an in-vehicle device such as a navigation device or an audio device, but is not limited to this and may be used in other types of devices as long as they have a display function.

[0015] The display device 1 will be described in detail below with reference to Figures 2 and 3. Figure 2 is an exploded perspective view of the display device 1, and Figure 3 is an end view taken along line III-III in Figure 1.

[0016] As shown in FIGS. 2 and 3, the display device 1 includes a housing 10, a display panel 20, a cover panel 30, and a backlight unit 40.

[0017] The housing 10 includes an exterior panel 11 and a back member 12. By assembling the exterior panel 11 and the back member 12, the housing 10 can accommodate a display panel 20, a backlight unit 40, and the like.

[0018] The exterior panel 11 is a frame-shaped member having an opening 11a in the center and is formed in a rectangular shape when viewed from the front. The exterior panel 11 has an adhesive surface 11b and a contact portion 11c. The adhesive surface 11b is a portion on the outer periphery of the opening 11a, and is a portion to which the cover panel 30 is adhered via a first adhesive 81 (see FIG. 3) described below.

[0019] The contact portion 11c is a portion that contacts the cover panel 30, and is formed, for example, at the lower portion of the exterior panel 11. The contact of the contact portion 11c determines the position of the cover panel 30 relative to the exterior panel 11, which will be described later with reference to Fig. 5. The position where the contact portion 11c is formed is merely an example and is not limited thereto.

[0020] The back surface member 12 is a frame-shaped member that is disposed on the back surface side (positive Y-axis direction side) of the exterior panel 11. As shown in Fig. 3, the back surface member 12 is assembled to the exterior panel 11 so as to sandwich the backlight unit 40 (more precisely, a holder 60, which will be described later).

[0021] The display panel 20 is a panel that displays various information on a front surface 20a. A liquid crystal panel, for example, can be used as the display panel 20. The display panel 20 is formed in a rectangular shape when viewed from the front.

[0022] 3, the display panel 20 is disposed at a position corresponding to the opening 11a of the housing 10 (more specifically, the opening 11a of the exterior panel 11). A joint 21 that joins the display panel 20 and the cover panel 30 is formed on the front surface 20a of the display panel 20. In other words, the joint 21 is interposed between the display panel 20 and the cover panel 30. Note that the joint 21 may be made of a translucent resin such as OCR (Optical Clear Resin).

[0023] The cover panel 30 is a member that covers the front surface 20a of the display panel 20, and is formed in a rectangular shape when viewed from the front. The cover panel 30 may be, for example, a cover glass made of a light-transmitting material such as glass.

[0024] The cover panel 30 will now be described in more detail with reference to Figure 4. Figure 4 is a rear view of the display panel 20 to which the cover panel 30 is joined.

[0025] 4, the area of ​​the cover panel 30 is set to be larger than the area of ​​the display panel 20 when viewed from the back (or front). In other words, the cover panel 30 is formed so that an outer peripheral portion is exposed from the display panel 20 when the cover panel 30 is bonded to the display panel 20. Hereinafter, the exposed outer peripheral portion of the cover panel 30 may be referred to as the "outer peripheral portion 30c."

[0026] As described above, the cover panel 30 is adhered to the exterior panel 11 (housing 10; see FIG. 3) by the first adhesive 81, and this first adhesive 81 is applied to the outer periphery 30c of the back surface 30b of the cover panel 30. In FIG. 4, the first adhesive 81 is indicated by a dashed line.

[0027] Specifically, the first adhesive 81 is applied along the outer periphery 30c of the cover panel 30. More specifically, application of the first adhesive 81 begins, for example, at a position near the bottom end of the cover panel 30 as a start point 81x, and is applied in a circular manner along the outer periphery 30c, and then ends at a position near the bottom end of the cover panel 30 that is a predetermined distance away from the start point 81x as an end point 81y. Note that the predetermined distance from the start point 81x to the end point 81y, in other words, the distance, can be set to any value.

[0028] 3, the cover panel 30 coated with the first adhesive 81 is attached to the exterior panel 11 (housing 10) by assembling the cover panel 30 with the outer peripheral portion 30c facing the adhesive surface 11b of the exterior panel 11. In this manner, the first adhesive 81 is an adhesive that bonds the housing 10 (more precisely, the exterior panel 11) and the cover panel 30. The first adhesive 81 is a liquid adhesive that hardens after application, but is not limited to this.

[0029] Here, the positioning of the cover panel 30 relative to the exterior panel 11 will be described. As described above, the exterior panel 11 has a contact portion 11c (see FIG. 2) that positions the cover panel 30. The contact portion 11c is formed, for example, in a portion between the start point 81x and the end point 81y of the first adhesive 81, in other words, in a position where the first adhesive 81 is not applied.

[0030] In the above description, the contact portion 11c is formed in a portion between the start point 81x and the end point 81y of the first adhesive 81, but this is not limited to this. That is, for example, a plurality of contact portions 11c may be provided, such as at least one contact portion on each side of the exterior panel 11, or the contact portion 11c may be formed in an area where the first adhesive 81 spreads. This makes it possible to position the cover panel 30 on the exterior panel 11 while suppressing tilting of the entire cover panel 30.

[0031] This contact portion 11c will be described in detail with reference to Fig. 5. Fig. 5 is an end view taken along line VV in Fig. 1, and is a diagram illustrating the contact portion 11c of the exterior panel 11. Note that, for simplicity of illustration, Fig. 5 shows only the exterior panel 11 and the cover panel 30.

[0032] 5, the abutting portion 11c is a portion formed so as to protrude toward the cover panel 30. Specifically, the abutting portion 11c is a portion formed so as to protrude toward the outer periphery 30c of the cover panel 30 in a state in which the outer periphery 30c faces the adhesive surface 11b (see FIG. 3 for both) when the cover panel 30 and the exterior panel 11 are assembled.

[0033] When the cover panel 30 and the exterior panel 11 are assembled, the abutment portion 11c of the exterior panel 11 abuts against the outer peripheral portion 30c of the cover panel 30, thereby restricting movement of the cover panel 30 relative to the exterior panel 11 (or movement of the exterior panel 11 relative to the cover panel 30), thereby positioning the cover panel 30 relative to the exterior panel 11 (housing 10).

[0034] This positioning defines the width of the cover panel 30 and the exterior panel 11 in the depth direction (Y direction) when they are assembled, and with this width defined, the cover panel 30 and the exterior panel 11 are adhered together by the first adhesive 81. Note that, by defining the width of the cover panel 30 and the exterior panel 11 in the depth direction (Y direction) through positioning by the abutting portion 11c, a gap A (to be described later) is formed between the display panel 20 and the backlight unit 40, which will be described later.

[0035] Furthermore, in the above description, the exterior panel 11 of the housing 10 is provided with the abutment portion 11c, but this is not limited to this. For example, although not shown, the cover panel 30 may be provided with an abutment portion that abuts against the exterior panel 11 of the housing 10, and the cover panel 30 may be positioned by the abutment portion. That is, the abutment portion according to this embodiment may be formed on at least one of the cover panel 30 and the housing 10, and may be configured to abut against the other of the cover panel 30 and the housing 10.

[0036] Next, the backlight unit 40 will be described with reference to Figures 2 and 3. The backlight unit 40 is disposed on the rear surface 20b side of the display panel 20, and irradiates light onto the display panel 20. The backlight unit 40 is an example of a contained portion.

[0037] For example, the backlight unit 40 includes a backlight section 50, a holder 60, and a frame 70. The backlight section 50 also includes a light guide plate 51, a diffusion layer 52, and a reflective layer 53, as shown in FIG.

[0038] The light guide plate 51 is, for example, translucent and formed in a plate shape. The light guide plate 51 emits light incident thereon from a light source (not shown) toward the display panel 20. The diffusion layer 52 is a sheet-like member and is provided, for example, on the display panel 20 side of the light guide plate 51. The diffusion layer 52 diffuses the light emitted from the light guide plate 51. The reflective layer 53 is a sheet-like member and is provided, for example, on the surface of the light guide plate 51 opposite to the display panel 20 side. The reflective layer 53 reflects light from, for example, the light source or the light guide plate 51 toward the display panel 20.

[0039] The holder 60 holds the backlight unit 50. For example, the holder 60 includes a flat plate portion 60a, a wall portion 60b, and a protrusion portion 60c. As shown in FIG. 2, the flat plate portion 60a is a flat plate-shaped member and is disposed on the back side of the backlight unit 50. The wall portion 60b stands upright from the flat plate portion 60a and is formed so as to surround the periphery of the backlight unit 50. Therefore, the backlight unit 50 is disposed in a space surrounded by the flat plate portion 60a and the wall portion 60b.

[0040] The protrusion 60c is a portion that functions to position the backlight unit 40 relative to the housing 10. Specifically, as shown in Fig. 3, for example, the protrusion 60c is formed so as to protrude from a position on the outer periphery side of the position where the wall portion 60b is formed on the flat plate portion 60a toward the exterior panel 11 of the housing 10 (the negative Y-axis direction side).

[0041] As described above, in the housing 10, the back member 12 and the exterior panel 11 are assembled together so as to sandwich the holder 60 of the backlight unit 40, thereby accommodating the backlight unit 40. During this assembly, the convex portion 60c of the holder 60 abuts against the exterior panel 11 of the housing 10 (more precisely, the back side of the adhesive surface 11b), thereby restricting movement of the backlight unit 40 relative to the housing 10. This restriction positions the backlight unit 40 relative to the housing 10.

[0042] This positioning determines the width of the backlight unit 40 and the housing 10 in the depth direction (Y direction) when assembled, and because this width is determined, a gap A is formed between the display panel 20 and the backlight unit 40, which will be described later.

[0043] The frame 70 is a frame-shaped member having an opening 70a in the center, and is formed in a rectangular shape when viewed from the front. The frame 70 is attached and fixed to the holder 60. Specifically, the frame 70 is attached and fixed to the wall 60b of the holder 60 at a position where light from the backlight unit 50 passes through the opening 70a.

[0044] The backlight unit 40 configured as described above is adhered to the display panel 20 via the second adhesive 82. More specifically, the frame 70 of the backlight unit 40 is adhered to the display panel 20 via the second adhesive 82.

[0045] The second adhesive 82 described above is applied to the display panel 20. Here, the position on the display panel 20 where the second adhesive 82 is applied will be described with reference to Fig. 4. Note that in Fig. 4, the second adhesive 82 is indicated by a dashed line.

[0046] As shown in FIG. 4, the second adhesive 82 is applied to the outer periphery 20c of the rear surface 20b of the display panel 20.

[0047] Specifically, the second adhesive 82 is applied along the outer periphery 20c of the display panel 20. More specifically, application of the second adhesive 82 begins, for example, at a position near the bottom edge of the display panel 20 as a start point 82x, and is applied in a circular manner along the outer periphery 20c, and then ends at a position near the bottom edge of the display panel 20 that is a predetermined distance away from the start point 82x as an end point 82y. Note that the predetermined distance from the start point 82x to the end point 82y, in other words, the distance, can be set to any value.

[0048] 3, the display panel 20 coated with the second adhesive 82 is attached to the backlight unit 40 by assembling the display panel 20 with the outer periphery 20c of the rear surface 20b facing the backlight unit 40 (more precisely, the front surface 70b of the frame 70). In this manner, the second adhesive 82 is an adhesive that bonds the outer periphery 20c of the rear surface 20b of the display panel 20 to the backlight unit 40. The second adhesive 82 is a liquid adhesive that hardens after application, but is not limited to this.

[0049] As described above, in the display device 1 according to this embodiment, the display panel 20 and the backlight unit 40 are bonded together with the second adhesive 82. This makes it possible to prevent foreign matter such as dust from entering between the display panel 20 and the backlight unit 40 with the second adhesive 82, thereby improving the dustproofness of the display device 1.

[0050] Furthermore, in this embodiment, the second adhesive 82 is used to improve dustproofness, which allows the display device 1 to be thinned in width in the depth direction (Y direction). That is, for example, if a spacer made of an elastic material such as sponge is interposed between the display panel 20 and the backlight unit 40 instead of the second adhesive 82, the spacer needs to be compressed with a certain amount of load to seal the gap between the display panel 20 and the backlight unit 40. However, there are product-related restrictions on the load that can be applied to the display panel 20, etc., and to seal the gap between the display panel 20 and the backlight unit 40 with such a restricted load, the spacer needs to have a certain thickness in the depth direction (Y direction), which may result in a problem in which the display device 1 cannot be thinned.

[0051] Therefore, in this embodiment, by using the second adhesive 82, it is possible to seal the gap between the display panel 20 and the backlight unit 40 regardless of the load acting on the display panel 20, etc., and by adjusting the depth width of the second adhesive 82, it is possible to reduce the depth width of the display device 1.

[0052] Furthermore, in this embodiment, the second adhesive 82 is used, which allows the second adhesive 82 to be spread with a relatively small assembly load, thereby improving the degree of freedom in setting the depth direction width of the display device 1, including the depth direction width of the second adhesive 82. Furthermore, in this embodiment, the second adhesive 82 is used, which allows for cost reduction compared to when spacers or the like are used.

[0053] The second adhesive 82 can be the same adhesive as the first adhesive 81. The first and second adhesives 81 and 82 can be, for example, modified silicone adhesives, but are not limited to this, and other types of adhesives, such as acrylic or epoxy adhesives, can also be used.

[0054] This makes it possible to shorten, for example, the time required to manufacture the display device 1. That is, in this embodiment, the second adhesive 82 is appropriately configured by using the same adhesive for the first adhesive 81 and the second adhesive 82, so that, for example, the first adhesive 81 and the second adhesive 82 can be applied in a single application step, thereby shortening the time required for the application step and, as a result, shortening the time required to manufacture the display device 1.

[0055] Continuing with the description of the configuration of the second adhesive 82. As shown in Fig. 3, there is a relatively narrow clearance between the display panel 20 and the backlight unit 40 (more precisely, the frame 70). Therefore, the contact area of ​​the second adhesive 82 with the display panel 20 and the backlight unit 40 is likely to be large, and there is a risk that the second adhesive 82 between the display panel 20 and the backlight unit 40 may wet and spread beyond the intended range when assembling the display device 1, for example.

[0056] Therefore, in this embodiment, the configuration of the second adhesive 82 to be applied can be made appropriate, thereby preventing the second adhesive 82 from wetting and spreading beyond the intended range.

[0057] This configuration will be described in detail below with reference to Figures 3, 6, and 7. Figure 6 is a front view of the frame body 70 of the backlight unit 40. Figure 7 is an enlarged cross-sectional view showing the vicinity of the second adhesive 82. For ease of understanding, Figure 7 only shows the second adhesive 82, the display panel 20, and the frame body 70.

[0058] 3, 6, and 7, the backlight unit 40 includes a protrusion 71. For example, as shown in FIGS. 3 and 7, the protrusion 71 is formed on the frame 70 of the backlight unit 40 at a position corresponding to the second adhesive 82, and is formed so as to protrude toward the display panel 20. More specifically, the protrusion 71 is formed on the frame 70 at a position facing the outer periphery 20c of the display panel 20 to which the second adhesive 82 is applied, and is formed so as to protrude toward the outer periphery 20c of the display panel 20.

[0059] The protrusions 71 are formed so that their cross-sectional shape in the protruding direction (Y-axis direction) is rectangular. As shown in Fig. 7, the protrusions 71 are formed so that their tip portions 71a come into contact with the second adhesive 82 when the display panel 20 and the backlight unit 40 are assembled together. Therefore, the gap between the display panel 20 and the backlight unit 40 is sealed by the second adhesive 82 in contact with the protrusions 71 (more precisely, the tip portions 71a).

[0060] As described above, in the present embodiment, the backlight unit 40 is provided with the protrusions 71, so that, for example, the contact area of ​​the second adhesive 82 with the backlight unit 40 can be reduced. Even if a load is applied from the backlight unit 40 or the like when the backlight unit 40 and the display panel 20 are assembled, the second adhesive 82 is less likely to wet and spread because the contact area with the backlight unit 40 is reduced. That is, in the present embodiment, the applied second adhesive 82 is appropriately configured to include the protrusions 71, so that the second adhesive 82 can be prevented from wetting and spreading beyond a desired range.

[0061] 6 and other figures, the protrusion 71 is a rib that continues along the circumferential direction of the backlight unit 40. In more detail, the frame 70 of the backlight unit 40 has an outer periphery 71c formed on the outer periphery of the opening 70a, and the protrusion 71 is a rib that extends along the outer periphery 71c of the front surface 71b of the frame 70.

[0062] In this way, the protrusions 71 according to the present embodiment are ribs as described above, and therefore can prevent the second adhesive 82 from wetting and spreading beyond a desired range in the circumferential portion (outer peripheral portion 71c) of the backlight unit 40. Furthermore, because the protrusions 71 are ribs, the protrusions 71 can be easily formed.

[0063] 3 and 7, a gap A is formed between the display panel 20 and the backlight unit 40. Specifically, a gap A having a separation distance D is formed between the protrusion 71 of the backlight unit 40 and the display panel 20 (more specifically, between the tip 71a of the protrusion 71 and the outer periphery 20c of the back surface 20b of the display panel 20). In other words, the protrusion 71 and the display panel 20 are formed so as not to come into contact (abut) with each other when the backlight unit 40, the display panel 20, etc. are assembled. The second adhesive 82 described above is positioned in the gap A.

[0064] In this manner, in the present embodiment, the gap A is formed between the protrusion 71 and the display panel 20, and therefore, for example, when the display panel 20 and the backlight unit 40 are assembled, it is possible to effectively prevent excessive load from being applied from the protrusion 71 to the second adhesive 82 applied to the display panel 20. This makes it possible to further prevent the second adhesive 82 from wetting and spreading beyond the intended range.

[0065] The gap A is formed by positioning the cover panel 30 and the housing 10 by the contact portion 11c (see FIG. 5) and by positioning the backlight unit 40 and the housing 10 by the protrusion 60c (see FIG. 3). This ensures that the gap A is secured in this embodiment.

[0066] More specifically, as described above, the width of the cover panel 30 and the housing 10 in the depth direction (Y direction) when assembled is determined by the positioning of the cover panel 30 and the housing 10 (more precisely, the exterior panel 11) by the abutment portion 11c (see FIG. 5). Also, as described above, the width of the backlight unit 40 and the housing 10 in the depth direction (Y direction) is determined by the positioning of the backlight unit 40 and the housing 10 by the protrusion portion 60c.

[0067] Here, the display panel 20 on one side that constitutes the gap A is joined to the positioned cover panel 30, and therefore the position of the display panel 20 in the depth direction is also determined. In addition, the protrusion 71 on the other side that constitutes the gap A is provided on the positioned backlight unit 40, and therefore the position of the protrusion 71 in the depth direction is also determined.

[0068] In this manner, in this embodiment, the depthwise positions of the display panel 20 and the protrusion 71 are determined by positioning using the abutment portion 11c (see Figure 5) and the convex portion 60c (see Figure 3), etc., so that a gap A can be reliably secured between the display panel 20 and the protrusion 71.

[0069] Next, the shape of the protrusion 71 near the start point 82x and end point 82y of the second adhesive 82 (see FIG. 4) will be described with reference to FIGS. 8A and 8B. FIG. 8A is a rear view of the display panel 20, specifically showing the vicinity of the start point 82x and end point 82y of the second adhesive 82 applied to the display panel 20. Note that for ease of understanding, FIG. 8A shows the protrusion 71 near the start point 82x and end point 82y with imaginary lines. FIG. 8B is a side view of the vicinity of the start point 82x and end point 82y of the second adhesive 82 applied to the display panel 20. Note that for ease of understanding, FIG. 8B shows the display panel 20 and the frame 70 in a state before they are assembled.

[0070] Before describing the shape of the protrusion 71, we will now describe the second adhesive 82 that is applied to the display panel 20. As described above, the start point 82x is the position where application of the second adhesive 82 begins, and the end point 82y is the position where application of the second adhesive 82 ends. Due to the characteristics of the application process, as shown in FIGS. 8A and 8B , the amount of second adhesive 82 applied at the start point 82x and the end point 82y tends to be greater than at positions other than the start point 82x and the end point 82y.

[0071] In this way, if the above-mentioned protrusion 71 comes into contact with the starting point 82x or the end point 82y of the second adhesive 82, which has been applied in a relatively large amount, during assembly, there is a risk that the second adhesive 82 near the starting point 82x or the end point 82y will wet and spread beyond the intended range.

[0072] Therefore, in this embodiment, the protrusion 71 is not formed at a position 70x (see FIG. 8B) corresponding to the start point 82x of the second adhesive 82, and at a position 70y (see FIG. 8B) corresponding to the end point 82y of the second adhesive 82. More specifically, the protrusion 71 is not formed between the position 70x corresponding to the start point 82x of the second adhesive 82 and the position 70y corresponding to the end point 82y of the second adhesive 82.

[0073] As a result, even if a relatively large amount of second adhesive 82 is applied at the start point 82x or end point 82y, the protrusion 71 does not come into contact with the second adhesive 82 during assembly, so the load from the protrusion 71 is less likely to act, and therefore the second adhesive 82 near the start point 82x or end point 82y can be prevented from wetting and spreading beyond the intended range.

[0074] In the above description, the backlight unit 40 is provided with the protrusion 71, but the present invention is not limited to this. For example, although not shown, the display panel 20 may be configured to have the protrusion. That is, the protrusion according to this embodiment may be formed at a position corresponding to the second adhesive 82 on at least one of the backlight unit 40 and the display panel 20 so as to protrude toward the other of the backlight unit 40 and the display panel 20.

[0075] As described above, the display device 1 according to the embodiment includes a housing 10, a display panel 20, a cover panel 30, a first adhesive 81, a backlight unit 40 (an example of a housing), a second adhesive 82, and a protrusion 71. The housing 10 has an opening 11a. The display panel 20 is disposed at a position corresponding to the opening 11a of the housing 10. The cover panel 30 covers the front surface 20a of the display panel 20. The first adhesive 81 bonds the housing 10 and the cover panel 30 together. The backlight unit 40 is disposed on the back surface 20b of the display panel 20 and is housed in the housing 10. The second adhesive 82 bonds the outer periphery 20c of the back surface 20b of the display panel 20 to the backlight unit 40. The protrusion 71 is formed at a position corresponding to the second adhesive 82 on at least one of the backlight unit 40 and the display panel 20 so as to protrude toward the other of the backlight unit 40 and the display panel 20. This allows the second adhesive 82 to be applied to have an appropriate configuration.

[0076] The first adhesive 81 and the second adhesive 82 are the same adhesive, which allows the second adhesive 82 to be applied to have an appropriate configuration.

[0077] <First Modification> Next, modified examples of the protrusion 71 will be described with reference to Figures 9A to 13. Figure 9A is a rear view of the display panel 20 according to a first modified example, and Figure 9B is a side view of the vicinity of the start point 82x and the end point 82y of the second adhesive 82 applied to the display panel 20 according to the first modified example. Figures 9A and 9B correspond to Figures 8A and 8B.

[0078] As shown in Figures 9A and 9B, in the first modified example, the protrusion portion 171 is formed so that the shape of the position 70x (see Figure 9B) corresponding to the starting point 82x of the second adhesive 82 and the shape of the position 70y (see Figure 9B) corresponding to the ending point 82y of the second adhesive 82 are different from the shapes of the positions corresponding to parts other than the starting point 82x and the ending point 82y of the second adhesive 82.

[0079] For example, the protrusion 171 according to the first modification includes an end portion 172. The end portion 172 is formed on the display panel 20 at a position 70x corresponding to a start point 82x of the second adhesive 82 and a position 70y corresponding to an end point 82y of the second adhesive 82.

[0080] For example, as shown in Fig. 9A, the end portion 172 is formed so that the width in the vertical direction (Z direction) decreases toward the end portion 172a. Also, as shown in Fig. 9B, the end portion 172 is formed so that the width in the depth direction (Y direction), in other words, the protruding height of the protrusion 171, decreases toward the end portion 172a.

[0081] As a result, in the first modified example, the contact area between the protrusion 171 and the starting point 82x and the ending point 82y of the second adhesive 82 can be reduced during assembly, so that even if a relatively large amount of second adhesive 82 is applied at the starting point 82x and the ending point 82y, the second adhesive 82 near the starting point 82x and the ending point 82y can be prevented from wetting and spreading beyond the intended range.

[0082] <Second Modification> Next, a second modified example will be described with reference to Figures 10A and 10B. Figure 10A is a rear view of display panel 20 according to the second modified example, and Figure 10B is a side view of the vicinity of start point 82x and end point 82y of second adhesive 82 applied to display panel 20 according to the second modified example. Figures 10A and 10B correspond to Figures 8A and 8B.

[0083] As shown in Figures 10A and 10B, in the second modified example, the protrusion portion 271 is formed so that the shape of a position 70x (see Figure 10B) corresponding to the starting point 82x of the second adhesive 82 and the shape of a position 70y (see Figure 10B) corresponding to the ending point 82y of the second adhesive 82 are different from the shapes of positions corresponding to parts other than the starting point 82x and the ending point 82y of the second adhesive 82.

[0084] For example, the protrusion 271 according to the second modification includes a connecting portion 273. The connecting portion 273 is formed on the display panel 20 at a position 70x corresponding to a starting point 82x of the second adhesive 82 and a position 70y corresponding to an ending point 82y of the second adhesive 82, and is a portion that connects the ends 271a of the protrusion 271 together.

[0085] For example, as shown in Fig. 10A, the connecting portion 273 is formed so that its width in the vertical direction (Z direction) is smaller than the width of the end portion 271a of the protrusion 271. Also, as shown in Fig. 10B, the connecting portion 273 is formed so that its width in the depth direction (Y direction) is smaller than the width of the end portion 271a of the protrusion 271. In other words, the connecting portion 273 is formed so that the protrusion height of the protrusion 271 is smaller than the protrusion height of the end portion 271a.

[0086] As a result, in the second modified example, the contact area between the protrusion 271 and the starting point 82x and the ending point 82y of the second adhesive 82 can be reduced during assembly, so that even if a relatively large amount of second adhesive 82 is applied at the starting point 82x and the ending point 82y, the second adhesive 82 near the starting point 82x and the ending point 82y can be prevented from wetting and spreading beyond the intended range.

[0087] <Third Modification to Fifth Modification> Next, third to fifth modified examples will be described with reference to Fig. 11 to Fig. 13. Fig. 11 is an enlarged cross-sectional view showing the vicinity of protrusion 371 and second adhesive 82 according to the third modified example. Fig. 12 is an enlarged cross-sectional view showing the vicinity of protrusion 471 and second adhesive 82 according to the fourth modified example. Fig. 13 is an enlarged cross-sectional view showing the vicinity of protrusion 571 and second adhesive 82 according to the fifth modified example.

[0088] 11, the protrusion 371 according to the third modification is formed so that the width of a tip end 371a is smaller than the width of a base end 371b in a cross section in the protruding direction (Y-axis direction) of the protrusion 371. For example, the protrusion 371 is formed so that the cross section in the protruding direction of the protrusion 371 is trapezoidal.

[0089] 12, protrusion 471 according to the fourth modification is formed so that the width of tip end 471a is smaller than the width of base end 471b in the cross section in the protruding direction (Y-axis direction) of protrusion 471. For example, protrusion 471 is formed so that the cross section in the protruding direction of protrusion 471 is triangular.

[0090] 13, protrusion 571 according to the fifth modification is formed so that the width of tip end 571a is smaller than the width of base end 571b in the cross section in the protruding direction (Y-axis direction) of protrusion 571. For example, protrusion 571 is formed so that the cross section in the protruding direction of protrusion 571 is hemispherical.

[0091] In this way, in the third to fifth modified examples, the protrusions 371, 471, 571 are configured as described above, which makes it possible to reduce the contact area between the protrusions 371, 471, 571 and the start points 82x and end points 82y of the second adhesive 82 during assembly. Therefore, even if a relatively large amount of second adhesive 82 is applied at the start points 82x and end points 82y, the second adhesive 82 near the start points 82x and end points 82y can be prevented from wetting and spreading beyond the intended range.

[0092] The above-described embodiment and the first to fifth modified examples may be combined as appropriate. For example, the third and fourth modified examples may be combined to form the cross-sectional shape of the connecting portion 273 of the protrusion 271 to be trapezoidal.

[0093] Further advantages and modifications will readily occur to those skilled in the art. Therefore, the invention in its broader aspects is not limited to the specific details and representative embodiments shown and described above. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents. [Explanation of symbols]

[0094] 1 Display device 10. Cabinet 20 Display panel 30 Cover Panel 40 Backlight unit 71 Protrusion 81 First Adhesive 82 Second Adhesive

Claims

1. a housing having an opening; a display panel disposed at a position corresponding to the opening of the housing; a cover panel that covers the front surface side of the display panel; a first adhesive that bonds the housing and the cover panel; a housing portion disposed on a rear surface side of the display panel and housed in the housing; a second adhesive that bonds the outer periphery of the rear surface of the display panel to the accommodation portion; a protrusion formed at a position corresponding to the second adhesive on at least one of the accommodated portion and the display panel so as to protrude toward the other of the accommodated portion and the display panel; a contact portion formed on at least one of the cover panel and the housing, the contact portion contacting the other of the cover panel and the housing; Equipped with a gap is formed between the protrusion and the other of the accommodated portion and the display panel; the second adhesive is located in the gap; The cover panel and the housing are positioned by the abutting portion, thereby forming the gap. Display device.

2. a housing having an opening; a display panel disposed at a position corresponding to the opening of the housing; a cover panel that covers the front surface side of the display panel; a first adhesive that bonds the housing and the cover panel; a housing portion disposed on a rear surface side of the display panel and housed in the housing; a second adhesive that bonds the outer periphery of the rear surface of the display panel to the accommodation portion; a protrusion formed at a position corresponding to the second adhesive on at least one of the accommodated portion and the display panel so as to protrude toward the other of the accommodated portion and the display panel; Equipped with The protrusion is The second adhesive is not formed at a position corresponding to a start point where application of the second adhesive starts and at a position corresponding to an end point where application of the second adhesive ends. Display device.

3. a housing having an opening; a display panel disposed at a position corresponding to the opening of the housing; a cover panel that covers the front surface side of the display panel; a first adhesive that bonds the housing and the cover panel; a housing portion disposed on a rear surface side of the display panel and housed in the housing; a second adhesive that bonds the outer periphery of the rear surface of the display panel to the accommodation portion; a protrusion formed at a position corresponding to the second adhesive on at least one of the accommodated portion and the display panel so as to protrude toward the other of the accommodated portion and the display panel; Equipped with The protrusion is a shape of a position corresponding to a start point where application of the second adhesive starts and a shape of a position corresponding to an end point where application of the second adhesive ends are formed to be different from shapes of positions corresponding to portions of the second adhesive other than the start point and the end point; Display device.

4. The protrusion is a rib that is continuous along the circumferential direction of at least one of the accommodated portion and the display panel; The display device according to any one of claims 1 to 3.

5. The protrusion is In a cross-sectional shape in a protruding direction of the protrusion, the width of a tip end portion is smaller than the width of a base end portion. The display device according to any one of claims 1 to 4.

6. The protrusion is The cross-sectional shape of the protrusion in the protruding direction is formed to be any one of a trapezoidal shape, a triangular shape, and a hemispherical shape. The display device according to claim 5 .

7. The first adhesive and the second adhesive are the same adhesive. The display device according to any one of claims 1 to 6.

8. The accommodated portion is a backlight unit including a frame body and configured to irradiate light onto the display panel; The second adhesive is the outer periphery of the rear surface of the display panel is bonded to the frame of the backlight unit; The display device according to any one of claims 1 to 7.

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