Adhesive sheet and display device

Abstract

The utility model relates to an adhesive sheet and a display device. An adhesive sheet according to one embodiment includes an adhesive, a first separator, and a second separator. The adhesive has a main body part, a protrusion protruding from the main body part, a first surface formed across the main body part and the protrusion, and a second surface located on the opposite side of the first surface. The first diaphragm is adhered to the first surface. The second diaphragm is adhered to the second surface.

Description

[0001] Cross-references to related applications

[0002] This application claims the priority based on Japanese Patent Application No. 2023-111511 filed on July 6, 2023, and cites all the contents described in the Japanese Patent Application. Technical Field

[0003] Embodiments of the utility model relate to an adhesive sheet and a display device. Background Art

[0004] In recent years, various display devices have been proposed. In the manufacturing process of the display device, an adhesive sheet is used, for example, to bond the display panel to the cover plate component. The adhesive sheet has a structure in which a diaphragm is bonded to both sides of the adhesive, and the bonding surface of the adhesive is exposed by peeling off the diaphragm.

[0005] However, when the separator is peeled off, it may be difficult to peel the separator off from the adhesive. Utility Model Content

[0006] In summary, according to an embodiment, an adhesive sheet includes an adhesive, a first diaphragm, and a second diaphragm. The adhesive has a main body, a protrusion protruding from the main body, a first surface formed over the main body and the protrusion, and a second surface located on the opposite side of the first surface. The first diaphragm is bonded to the first surface. The second diaphragm is bonded to the second surface.

[0007] In one embodiment, a display device includes a display panel, a cover member, and an adhesive. The display panel has a display area for displaying an image. The cover member is opposite to the display panel. The adhesive has a main body, a protrusion protruding from the main body, a first surface bonded to the display panel and extending over the main body and the protrusion, and a second surface bonded to the cover member and located on the opposite side of the first surface.

[0008] According to each embodiment, it is possible to provide an adhesive sheet in which a separator can be easily peeled off from an adhesive, and a display device including the adhesive. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a plan view showing a schematic configuration example of a display device.

[0010] Figure 2 It is a schematic plan view showing other elements included in the display device.

[0011] Figure 3 It is an enlarged view showing a schematic configuration example of a protrusion.

[0012] Figure 4It is along Figure 2 A schematic cross-sectional view of the display device taken along line AA in FIG.

[0013] Figure 5 This is a flowchart showing an example of a method for manufacturing a display device.

[0014] Figure 6 It is a diagram showing a schematic configuration example of an adhesive sheet.

[0015] Figure 7 This is a diagram for explaining the process of placing the adhesive sheet on the peeling device.

[0016] Figure 8 It is a diagram for explaining the step of peeling off the first separator.

[0017] Fig. 9 It is a diagram for explaining the step of peeling off the first separator.

[0018] Fig.10 It is a diagram for explaining the step of peeling off the first separator.

[0019] Fig.11 It is a diagram for explaining the process of attaching the display panel to the adhesive.

[0020] Fig.12 A diagram for explaining the process of cutting a display panel.

[0021] Fig.13 It is a diagram for explaining the step of peeling off the second separator.

[0022] Fig.14 It is a figure for demonstrating the process of sticking the cover member.

[0023] Fig.15 It is a plan view showing another configuration example of the display device.

[0024] Fig.16 It is a plan view showing still another configuration example of the display device.

[0025] Fig.17 It is a figure which shows another structural example of an adhesive sheet.

[0026] Fig.18 It is a diagram showing another configuration example of the protrusion. DETAILED DESCRIPTION

[0027] One embodiment will be described with reference to the drawings.

[0028] The disclosed content is only an example, and for those skilled in the art, the content that can be easily thought of with respect to appropriate changes that maintain the main purpose of the utility model is of course included in the scope of the utility model. In addition, in order to make the description clearer, the drawings sometimes schematically show the width, thickness, shape, etc. of each part compared with the actual method, but it is only an example and does not limit the interpretation of the utility model. In addition, in this specification and each figure, the same reference numerals are sometimes marked on the constituent elements that perform the same or similar functions as the constituent elements described above with respect to the already appeared figures, and repeated detailed descriptions are appropriately omitted.

[0029] It should be noted that in the drawings, as necessary, for easy understanding, mutually orthogonal X-axis, Y-axis and Z-axis are described. The direction along the X-axis is called the first direction X, the direction along the Y-axis is called the second direction Y, and the direction along the Z-axis is called the third direction Z. The situation of observing various elements parallel to the third direction Z is called a top view.

[0030] Figure 1 1 is a plan view showing a schematic configuration example of the display device DSP. The display device DSP may be a display device having an organic light emitting diode (OLED) as a light emitting element, a liquid crystal display device having a liquid crystal layer, or an LED display device having a light emitting diode (LED).

[0031] The display device DSP includes a display panel PNL, a cover member 30, and a mounting member MC. In the present embodiment, the display panel PNL and the cover member 30 are each rectangular in a plan view. However, the shape of the display panel PNL and the cover member 30 in a plan view is not limited to a rectangle, and may be other shapes such as a square, a circle, or an ellipse.

[0032] The display panel PNL includes a display area DA for displaying an image, a terminal TM, and a peripheral area SA surrounding the display area DA. The display area DA includes a plurality of pixels PX arranged in a matrix in the first direction X and the second direction Y.

[0033] The display panel PNL has a first side S1 and a second side S2 extending along the first direction X, and a third side S3 and a fourth side S4 extending along the second direction Y. The first side S1 corresponds to the side on which the terminal TM and the mounting component MC are arranged. The second side S2 sandwiches the display area DA and is located on the opposite side of the first side S1. The third side S3 and the fourth side S4 connect the first side S1 and the second side S2, respectively.

[0034] The peripheral area SA includes a first area AR1, a second area AR2, a third area AR3, and a fourth area AR4. The first area AR1 is located between the first side S1 and the display area DA. The second area AR2 is located between the second side S2 and the display area DA. The third area AR3 is located between the third side S3 and the display area DA. The fourth area AR4 is located between the fourth side S4 and the display area DA.

[0035] The terminal TM is provided in the first area AR1. The mounting component MC is mounted on the terminal TM. The terminal TM is electrically connected to wirings for driving the pixel PX, such as a scanning line and a signal line.

[0036] The cover member 30 faces the display panel PNL. The cover member 30 covers the entire surface of the display panel PNL in a plan view. The cover member 30 is formed of a transparent material such as glass or plastic. In addition, the cover member 30 may also include a polarizing plate, a phase difference plate, a touch panel, and the like.

[0037] The mounting component MC includes a wiring substrate 1 and an IC chip 2. The wiring substrate 1 is connected to the terminal TM. The IC chip 2 is disposed on the wiring substrate 1. It should be noted that the display panel PNL may also have a terminal different from the terminal TM connected to the wiring substrate 1, and the IC chip 2 may also be directly connected to the terminal. The wiring substrate 1 is, for example, a bendable flexible printed circuit substrate. The IC chip 2 has, for example, a display driver that outputs a signal required for image display.

[0038] Figure 2 1 is a schematic top view showing other elements of the display device DSP. The display device DSP also includes an adhesive AD. The adhesive AD bonds the display panel PNL to the cover member 30. The adhesive AD is formed of, for example, an optical adhesive having high light transmittance. As the optical adhesive, for example, OCA (Optical Clear Adhesive) can be used.

[0039] The adhesive AD has a main body ADa and protrusions ADb. In this embodiment, the main body ADa is rectangular in plan view. However, the shape of the main body ADa in plan view is not limited to a rectangle, but may be other shapes such as a square, a circle, or an ellipse. The main body ADa covers the entire surface of the display area DA in plan view. Figure 2 In the example shown in FIG. 4 , the main body portion ADa also covers a portion of the peripheral area SA.

[0040] The protrusion ADb protrudes from the main body ADa. Figure 2 In the example of , the protrusion ADb protrudes from the side of the main body ADa on the second side S2 toward the second direction Y. Figure 2In the embodiment, the protrusion ADb is located near the center of the main body ADa in the first direction X. However, the protrusion ADb may be located in the first direction X closer to the third side S3 or the fourth side S4 than the center of the main body ADa.

[0041] The protrusion ADb is arranged in the peripheral area SA. In the present embodiment, the protrusion ADb is arranged in the second area AR2. It should be noted that the protrusion ADb may also be arranged in the first area AR1, the third area AR3 or the fourth area AR4. In addition, the adhesive AD may also have a plurality of protrusions ADb. Furthermore, the plurality of protrusions ADb may be arranged in any one of the first area AR1, the second area AR2, the third area AR3 and the fourth area AR4, or may be dispersedly arranged in two or more areas.

[0042] Figure 3 : is an enlarged view showing a schematic configuration example of the protrusion ADb. The protrusion ADb has sides A1 and A2 that intersect the first direction X and the second direction Y, respectively. The side A1 is inclined at an angle θ1 relative to the connecting portion A3 between the main body ADa and the protrusion ADb. The side A2 is inclined at an angle θ2 relative to the connecting portion A3. The side A1 and the side A2 form an angle θ3.

[0043] exist Figure 3 In the embodiment, the angle θ1 and the angle θ2 are acute angles. Therefore, as the width WX of the protrusion ADb along the first direction X gradually decreases from the connection portion A3 to the front end A4 of the protrusion ADb. For example, the angle θ1 and the angle θ2 are equal. Figure 3 In the example, angle θ1, angle θ2, and angle θ3 are each 60°. Figure 3 In the example, the protrusion ADb is an equilateral triangle in a plan view. It should be noted that the shape of the protrusion ADb is not limited to an equilateral triangle. The protrusion ADb may also be Fig.18 The shape shown will be described in detail later. In addition, the adhesive AD may have a plurality of protrusions ADb of the same shape or a plurality of protrusions ADb of different shapes.

[0044] The length of the front end A4 along the first direction X is defined as width W1, and the length of the connecting portion A3 along the first direction X is defined as width W2. For example, width W1 is smaller than width W2. Figure 3 In the example, the front end A4 corresponds to the vertex of the triangle, so the width W1 is substantially zero. However, for example, when using Fig.18 However, as in some modified examples described later, the width W1 may not be zero.

[0045] Figure 4 It is along Figure 2Schematic cross-sectional view of the display device DSP taken along line AA in FIG. The adhesive AD further includes a first surface As1 and a second surface As2 on the opposite side of the first surface As1. The first surface As1 and the second surface As2 are formed over the main body ADa and the protrusion ADb. The first surface As1 is bonded to the display panel PNL. The second surface As2 is bonded to the cover member 30.

[0046] exist Figure 4 In the example of , the front end A4 is located closer to the display area DA than the second side S2 in the second direction Y. In addition, the front end A4 is located closer to the display area DA than the side 31 of the cover member 30 in the second direction Y. The front end A4 may not overlap with the second side S2 and the side 31 in a plan view, or may overlap with at least one of the second side S2 and the side 31.

[0047] Next, an example of a method for manufacturing the display device DSP will be described.

[0048] Figure 5 This is a flowchart showing an example of a method for manufacturing a display device DSP. The manufacturing method shown here includes a step of preparing an adhesive sheet (step ST1), a step of placing the adhesive sheet on a peeling device (step ST2), a step of peeling off the first diaphragm (step ST3), a step of pasting a display panel (step ST4), a step of cutting the display panel (step ST5), a step of peeling off the second diaphragm (step ST6), and a step of pasting a cover member (step ST7).

[0049] Below, refer to Figures 6 to 14 Steps ST1 to ST7 are described in detail. Figures 6 to 14 In the figure, (a) shows a top view of each process, and (b) shows a side view of each process.

[0050] Figure 6 1 is a diagram showing a schematic configuration example of an adhesive sheet ADS prepared in step ST1. Figure 6 As shown in (a) and (b) respectively, the adhesive sheet ADS includes an adhesive AD, a first separator SP1, and a second separator SP2. Figure 6 As shown in (a) and (b) of FIG. 1 , the adhesive AD has the above-mentioned main body ADa, protrusions ADb, first surface As1, and second surface As2. The first diaphragm SP1 is bonded to the first surface As1. The second diaphragm SP2 is bonded to the second surface As2.

[0051] The first diaphragm SP1 has an inner surface SP1a and an outer surface SP1b on the opposite side of the inner surface SP1a. The inner surface SP1a is bonded to the first surface As1. The second diaphragm SP2 has an inner surface SP2a and an outer surface SP2b on the opposite side of the inner surface SP2a. The inner surface SP2a is bonded to the second surface As2. The bonding force between the adhesive AD and the first diaphragm SP1 is smaller than the bonding force between the adhesive AD and the second diaphragm SP2. The bonding force varies, for example, depending on the material of the diaphragm, the surface roughness of the bonding surface of the diaphragm, etc. For the first diaphragm SP1 and the second diaphragm SP2, for example, a resin material such as polyethylene terephthalate (PET) can be used.

[0052] The first diaphragm SP1 and the second diaphragm SP2 may have different thicknesses. For example, the thickness of the second diaphragm SP2 may be greater than the thickness of the first diaphragm SP1.

[0053] like Figure 6 As shown in (a) and (b) respectively, the first diaphragm SP1 further includes a first end SP1e and an extension area EA. The second diaphragm SP2 further includes a second end SP2e. The first end SP1e and the second end SP2e are each located in the protruding direction D of the protrusion ADb relative to the adhesive AD. The extension area EA is located between the first end SP1e and the second end SP2e in a plan view. The extension area EA does not overlap with the second diaphragm SP2 in a plan view. It should be noted that in this embodiment, the protruding direction D corresponds to the direction opposite to the second direction Y.

[0054] Figure 7 1 is a diagram for explaining the process (step ST2) of placing the adhesive sheet ADS in the peeling device 100. Figure 7 As shown in (a) and (b) respectively, the peeling device 100 includes a mounting table 101, a roller 102, and a peeling tape 103. The mounting table 101 has a first mounting surface 101a and a second mounting surface 101b. The first mounting surface 101a and the second mounting surface 101b are parallel to the XY plane. Figure 7 As shown in (b) in FIG. 1 , the first mounting surface 101 a is formed at a position higher than the second mounting surface 101 b .

[0055] The roller 102 is formed in a cylindrical shape extending in the first direction X. The release tape 103 is in contact with the surface of the roller 102. The release tape 103 is conveyed by the rotation of the roller 102. An adhesive is formed on the surface of the release tape 103, for example.

[0056] In the process of step ST2, the adhesive sheet ADS is arranged on the mounting table 101 in such a manner that the inner surface SP1a in the extension area EA contacts the first mounting surface 101a and the outer surface SP2b contacts the second mounting surface 101b. The mounting table 101 is further provided with an adsorption mechanism 110 for adsorbing the adhesive sheet ADS. The adsorption mechanism 110 is provided with a plurality of suction holes 111 connected to the second mounting surface 101b. The plurality of suction holes 111 are connected to, for example, a vacuum pump not shown. By the operation of the vacuum pump, the plurality of suction holes 111 are in a vacuum state, and the adhesive sheet ADS is fixed to the mounting table 101.

[0057] Figures 8 to 10 1 is a diagram for explaining the process of peeling off the first diaphragm SP1. Figure 8 As shown in (a) and (b) respectively, the surface of the release tape 103 is brought into contact with the first end portion SP1e of the first separator SP1.

[0058] Next, if Fig. 9 As shown in (a) and (b) respectively, the roller 102 is rotated and moved in the second direction Y while the release tape 103 is in contact with the outer surface SP1b. Thus, the first separator SP1 is conveyed together with the release tape 103 and is peeled from the adhesive AD.

[0059] Next, if Fig.10 As shown in (a) and (b) respectively, the roller 102 is moved to the end of the first diaphragm SP1 to peel the first diaphragm SP1 from the adhesive AD. As a result, the first surface As1, which is the bonding surface, is exposed. It should be noted that, as described above, the bonding force between the adhesive AD and the first diaphragm SP1 is smaller than the bonding force between the adhesive AD and the second diaphragm SP2. Therefore, when the roller 102 is moved to the end of the first diaphragm SP1, the first diaphragm SP1 is peeled from the adhesive AD without peeling the second diaphragm SP2 from the adhesive AD.

[0060] Fig.11 FIG. 1 is a diagram for explaining a process (step ST4) of attaching a display panel PNL to an adhesive AD. Fig.11 As shown in (b) of FIG. 1 , the display panel PNL is attached to the first surface As1 of the adhesive AD. Fig.11 In the example of (a), the display panel PNL is larger than the adhesive AD and the second separator SP2 in a plan view.

[0061] Fig.12 FIG. 1 is a diagram for explaining the process (step ST5) of cutting the display panel PNL. Fig.12 As shown in (a) and (b) respectively, the display panel PNL is cut along the cutting line CL. Fig.12In the example (a) of FIG. 1 , the display panel PNL is cut along two cutting lines CL along the first direction X and two cutting lines CL along the second direction Y. The four cutting lines CL are set outside the second diaphragm SP2. Fig.12 In the example shown in FIG. 1 , the cutting line CL does not overlap with the protrusion ADb.

[0062] In one example, in cutting the display panel PNL, the following method is used: Fig.12 The laser device 200 shown in (b) in FIG. The laser light LZ emitted from the laser device 200 is scanned along the cutting line CL, thereby cutting the display panel PNL. Fig.12 In the example (b) of FIG. 1 , two laser devices 200 are used, but one laser device 200 may be used to cut the display panel PNL.

[0063] exist Fig.12 In the example of FIG. 1 , only the display panel PNL is cut by the laser light LZ, but the adhesive AD and the second diaphragm SP2 may be cut together with the display panel PNL by the laser light LZ. In this case, the cut line CL overlaps the adhesive AD and the second diaphragm SP2 in a plan view.

[0064] Fig.13 1 is a diagram for explaining the process (step ST6) of peeling off the second diaphragm SP2. Fig.13 As shown in (a) and (b) respectively, the second separator SP2 is peeled off from the adhesive AD. Figures 7 to 10 The stripping device 100 shown has a stripping device of the same structure to strip the second separator SP2. Fig.13 As shown in (b) in FIG. 1 , the second separator SP2 is peeled off from the adhesive AD, thereby exposing the second surface As2 as the bonding surface.

[0065] Fig.14 1 is a diagram for explaining the process (step ST7) of attaching the cover member 30. In the process of step ST7, Fig.14 As shown in (b) of FIG. 1 , the cover member 30 is attached to the second surface As2 of the adhesive AD. Fig.14 In the example (a) of FIG. 1 , the cover member 30 is larger than the adhesive AD and the display panel PNL in a plan view.

[0066] Through the above steps, the display device DSP is manufactured.

[0067] According to this embodiment, Figure 6 As shown in FIG. 1 , the adhesive AD of the adhesive sheet ADS has a protrusion ADb protruding from the main body ADa. Figures 7 to 10In the step of peeling the first separator SP1 shown, when the adhesive AD does not have the protrusion ADb, the first separator SP1 is peeled from the side of the main body ADa along the first direction X. In this case, the peeling force for peeling the first separator SP1 from the adhesive AD is dispersed over the entire side, and the first separator SP1 may not be peeled smoothly.

[0068] On the other hand, when the adhesive AD has the protrusion ADb as in the present embodiment, the first separator SP1 is first peeled off from the front end A4. The length of the front end A4 in the first direction X is shorter than the above-mentioned side of the main body ADa. Therefore, the peeling force at the front end A4 becomes greater than the peeling force at the above-mentioned side in the case where there is no protrusion ADb. As a result, the first separator SP1 becomes easy to peel off from the adhesive AD.

[0069] In addition, if Figure 3 As shown in FIG. 1 , the width W1 of the front end A4 is smaller than the width W2 of the connecting portion A3. As a result, the width of the front end A4 becomes smaller, and thus the peeling force at the front end A4 becomes larger. Therefore, the first separator SP1 becomes easier to peel off from the adhesive AD. Figure 3 In the example of FIG. 1 , the protrusion ADb is a triangle with the tip A4 as a vertex. In this case, the first separator SP1 is smoothly peeled off so that the width of the peeling line with the adhesive AD gradually increases from the tip A4.

[0070] In addition, if Figure 6 As shown in FIG. 1 , the first diaphragm SP1 has an extended area EA located between the first end portion SP1e and the second end portion SP2e in a plan view and not overlapping with the second diaphragm SP2. Figure 7 As shown, part of the extended area EA can be placed on the first mounting surface 101a of the mounting table 101. Thus, when the first separator SP1 is peeled off, the roller 102 is pressed against the extended area EA on the first mounting surface 101a, and the release tape 103 can be brought into close contact with the first separator SP1.

[0071] In addition, if Figure 2 As shown in FIG. 1 , the main body portion ADa covers the entire surface of the display area DA in a plan view. This can suppress a decrease in display quality due to light scattering at the edge of the adhesive AD.

[0072] Moreover, the projection ADb is arranged in the second region AR2 opposite to the first region AR1 where the terminal TM and the mounting member MC mounted on the terminal TM are provided. Therefore, interference between the projection ADb and the mounting member MC and the terminal TM can be prevented.

[0073] Next, another configuration example of the display device DSP, the adhesive sheet ADS, and the protrusion ADb will be described. The same reference numerals are used for the same or similar elements as those of the above-described display device DSP, and duplicate descriptions are omitted as appropriate.

[0074] Fig.15 2 is a plan view showing another configuration example of the display device DSP. The front end A4 of the projection ADb is formed by a side extending along the first direction X. The front end A4 overlaps with the second side S2 in a plan view.

[0075] exist Fig.12 In the process of cutting the display panel PNL shown in FIG. Fig.15 The display device DSP can be manufactured, for example, by setting a cutting line CL on the protrusion ADb and cutting the protrusion ADb together with the display panel PNL.

[0076] exist Fig.15 In the display device DSP, the second area AR2 can be narrowed. Therefore, the frame of the display device DSP can be narrowed. Fig.15 The same effect as above can also be obtained in the display device DSP.

[0077] Fig.16 2 is a plan view showing another configuration example of the display device DSP. The protrusion ADb is arranged in the first area AR1. In addition, the protrusion ADb is arranged between the mounting member MC and the display area DA (between the terminal TM and the display area DA).

[0078] exist Fig.16 In the display device DSP, Figure 2 and Fig.15 Compared with the display device DSP of FIG. 1 , the peripheral area SA other than the first area AR1 can be narrowed. Therefore, the frame of the display device DSP can be narrowed. Fig.16 The same effect as above can also be obtained in the display device DSP.

[0079] Fig.17 It is a figure which shows another structural example of the adhesive sheet ADS. Fig.17 (a) shows a top view of the adhesive sheet ADS. Fig.17 (b) in FIG. 1 shows a side view of the adhesive sheet ADS. The main body ADa, the first diaphragm SP1, and the second diaphragm SP2 are each formed in a circular shape in a plan view. The main body ADa has a curved side edge A5 in a plan view. The protrusion ADb protrudes from the side edge A5. Fig.17 In the example of FIG. 1 , the first diaphragm SP1 and the second diaphragm SP2 are formed in a circular shape, but may be formed in a rectangular shape. Fig.17 The same effects as those described above can be obtained also in the adhesive sheet ADS.

[0080] Fig.18 It is a diagram showing another configuration example of the protrusion ADb. Fig.18 The protrusion ADb in (a) is an isosceles triangle in a plan view. In the example shown in the figure, the internal angle at the front end A4 is smaller than the other two internal angles. As another example, the internal angle at the front end A4 may be larger than the other two internal angles.

[0081] Fig.18 The protrusion ADb in (b) and (c) is a right triangle having a side at a right angle to the connection portion A3 in a plan view. Fig.18 The protrusion ADb in (c) has Fig.18 The protrusion ADb in (b) has a symmetrical shape.

[0082] Fig.18 The protrusion ADb in (d) is square in plan view. In this case, the width W1 of the front end A4 is equal to the width W2 of the connecting portion A3. It should be noted that the protrusion ADb may also be rectangular in plan view.

[0083] Fig.18 The protrusion ADb in (e) is a trapezoidal shape in which the tip A4 is parallel to the connection portion A3 and is shorter than the connection portion A3 in a plan view. That is, the width W1 of the tip A4 is smaller than the width W2 of the connection portion A3.

[0084] Fig.18 The protrusion ADb in (f) has a shape in which the width decreases stepwise from the connection portion A3 toward the front end A4 in a plan view. In this shape, the width W1 of the front end A4 is also smaller than the width W2 of the connection portion A3.

[0085] Fig.18 The protrusion ADb in (g) is a triangle with rounded corners at the front end A4 when viewed from above.

[0086] Fig.18 The protrusion ADb in (h) has a shape having a curve including a tip A4 and two sides at right angles to the connection portion A3 in a plan view.

[0087] exist Fig.18 The same effects as those described above can be obtained in the protrusions ADb of (a) to (h). In addition, various shapes can be applied to the protrusions ADb.

[0088] Based on the adhesive sheet and display device described above as embodiments of the present invention, all adhesive sheets and display devices that can be appropriately designed and modified by a person skilled in the art also fall within the scope of the present invention as long as they include the gist of the present invention.

[0089] Within the scope of the concept of the present invention, those skilled in the art can think of various variations, which also belong to the scope of the present invention. For example, embodiments obtained by adding, deleting or changing the design of the above-mentioned embodiments by those skilled in the art, or embodiments obtained by adding, omitting or changing the conditions of the processes as long as they have the gist of the present invention are included in the scope of the present invention.

[0090] In addition, regarding other effects brought about by the methods described in the above-mentioned embodiments, regarding the effects that are clear based on the records in this specification, or the effects that can be appropriately thought of by those skilled in the art, it is of course understood that they are the effects brought about by the utility model.

Claims

1. An adhesive sheet, characterized in that: have: An adhesive having a main body, a protrusion protruding from the main body, a first surface formed over the main body and the protrusion, and a second surface located on the opposite side of the first surface; a first diaphragm bonded to the first surface; and The second diaphragm is bonded to the second surface.

2. The adhesive sheet according to claim 1, wherein In a plan view, a width of a front end of the protrusion is smaller than a width of a connection portion between the main body and the protrusion.

3. The adhesive sheet according to claim 1, wherein The adhesive force between the adhesive and the first separator is smaller than the adhesive force between the adhesive and the second separator.

4. The adhesive sheet according to claim 3, wherein The first diaphragm has a first end portion located in a protruding direction of the protrusion, The second diaphragm has a second end portion located in a protruding direction of the protrusion, The first diaphragm further includes an extended region that is located between the first end portion and the second end portion in a plan view and does not overlap with the second diaphragm.

5. The adhesive sheet according to any one of claims 1 to 4, wherein The main body has a side edge that is curved when viewed from above. The protrusion protrudes from the side edge.

6. A display device, characterized in that: have: A display panel having a display area for displaying an image; a cover plate component, which is opposite to the display panel; and The adhesive has a main body, a protrusion protruding from the main body, a first surface bonded to the display panel and formed over the main body and the protrusion, and a second surface bonded to the cover member and located on the opposite side of the first surface.

7. The display device according to claim 6, wherein: In a plan view, a width of a front end of the protrusion is smaller than a width of a connection portion between the main body and the protrusion.

8. The display device according to claim 6, wherein: The main body covers the entire surface of the display area in a plan view.

9. The display device according to any one of claims 6 to 8, wherein: The display panel also has a peripheral area surrounding the display area. The protrusion is arranged in the peripheral area.

10. The display device according to claim 9, wherein: The display panel further includes a first side and a second side sandwiching the display area and located on the opposite side of the first side. The peripheral region includes a first region and a second region, The first area is provided with a terminal for mounting a mounting component and is located between the first side and the display area. The second area is located between the second side and the display area. The protrusion is arranged in the second region.

11. The display device according to claim 10, wherein: The second side overlaps with the front end of the protrusion in a plan view.

12. The display device according to claim 9, wherein: The display panel also has a first side, The peripheral region includes a first region provided with a terminal for mounting a mounting component and located between the first side and the display region. The protrusion is arranged in the first region.

13. The display device according to claim 11, wherein: The protrusion is arranged between the mounting component and the display area.

Images