Adhesive sheet and display device

Abstract

To provide an adhesive sheet which can easily peel off a separator from an adhesive and a display device provided with the adhesive.SOLUTION: There is provided an adhesive sheet which has an adhesive, a first separator and a second separator. The adhesive has a body part, a projection protruding from the body part, a first surface formed over the body part and the projection and a second surface positioned on the opposite side of the first surface. The first separator is bonded to the first surface. The second separator is bonded to the second surface.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] SUMMARY OF THE DISCLOSURE An embodiment of the present invention relates to an adhesive sheet and a display device. [Background technology]

[0002] In recent years, various types of display devices have been proposed. In the manufacturing process of a display device, for example, an adhesive sheet is used to bond a display panel and a cover member. The adhesive sheet has a structure in which separators are bonded to both sides of an adhesive, and the adhesive surface of the adhesive is exposed by peeling off the separators.

[0003] However, when peeling off the separator, it may be difficult to peel the separator off from the adhesive. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 7-185053 [Patent Document 2] Japanese Patent Application Publication No. 8-50290 [Patent Document 3] Japanese Patent Application Publication No. 11-9697 Summary of the Invention [Problem to be solved by the invention]

[0005] An object of the present invention is to provide an adhesive sheet that allows a separator to be easily peeled off from the adhesive, and a display device that includes the adhesive. [Means for solving the problem]

[0006] An adhesive sheet according to one embodiment includes an adhesive, a first separator, and a second separator. The adhesive has a main body, a protrusion protruding from the main body, a first surface formed across the main body and the protrusion, and a second surface located opposite the first surface. The first separator is adhered to the first surface. The second separator is adhered to the second surface.

[0007] A display device according to one embodiment includes a display panel, a cover member, and an adhesive. The display panel has a display area for displaying an image. The cover member faces 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 formed across the main body and the protrusion, and a second surface bonded to the cover member and located on the opposite side to the first surface. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a plan view showing a schematic configuration example of a display device. [Diagram 2] FIG. 2 is a schematic plan view showing other elements included in the display device. [Diagram 3] FIG. 3 is an enlarged view showing a schematic configuration example of a protrusion. [Figure 4] FIG. 4 is a schematic cross-sectional view of the display device taken along the line AA in FIG. [Diagram 5] FIG. 5 is a flow diagram showing an example of a method for manufacturing a display device. [Figure 6] FIG. 6 is a diagram showing a schematic configuration example of an adhesive sheet. [Figure 7] FIG. 7 is a diagram for explaining the step of placing the adhesive sheet on a peeling device. [Figure 8] FIG. 8 is a view illustrating the step of peeling off the first separator. [Figure 9] FIG. 9 is a view illustrating the step of peeling off the first separator. [Figure 10]FIG. 10 is a view illustrating the step of peeling off the first separator. [Figure 11] FIG. 11 is a diagram for explaining a process of attaching a display panel to an adhesive. [Figure 12] FIG. 12 is a diagram for explaining a process of cutting the display panel. [Figure 13] FIG. 13 is a view for explaining the step of peeling off the second separator. [Figure 14] FIG. 14 is a diagram for explaining the step of attaching the cover member. [Figure 15] FIG. 15 is a plan view showing another configuration example of the display device. [Figure 16] FIG. 16 is a plan view showing still another configuration example of the display device. [Figure 17] FIG. 17 is a diagram showing another example of the configuration of the adhesive sheet. [Figure 18] FIG. 18 is a diagram showing another configuration example of the protrusion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] An embodiment will be described with reference to the drawings. The disclosure is merely an example, and appropriate modifications that a person skilled in the art can easily conceive of while maintaining the gist of the invention are naturally included in the scope of the present invention. In addition, the drawings may be schematic in terms of width, thickness, shape, etc. of each part compared to the actual embodiment in order to make the explanation clearer, but they are merely examples and do not limit the interpretation of the present invention. In this specification and each figure, components that perform the same or similar functions as those described above with respect to the previous figures are given the same reference numerals, and duplicate detailed descriptions may be omitted as appropriate.

[0010] In addition, in the drawings, an X-axis, a Y-axis, and a Z-axis that are perpendicular to each other are shown as necessary to facilitate understanding. 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. Viewing various elements parallel to the third direction Z is called a planar view.

[0011] 1 is a plan view showing a schematic configuration example of the display device DSP. The display device DSP may be a display device including organic light-emitting diodes (OLED) as light-emitting elements, a liquid crystal display device having a liquid crystal layer, or an LED display device having light-emitting diodes (LEDs).

[0012] The display device DSP includes a display panel PNL, a cover member 30, and a mounting component MC. In this embodiment, the shapes of the display panel PNL and the cover member 30 in a plan view are each rectangular. However, the shapes of the display panel PNL and the cover member 30 in a plan view are not limited to rectangular, and may be other shapes such as square, circular, or elliptical.

[0013] The display panel PNL has a display area DA for displaying an image, a peripheral area SA surrounding the display area DA, and terminals TM. The display area DA has a plurality of pixels PX arranged in a matrix in a first direction X and a second direction Y.

[0014] The display panel PNL has a first side S1 and a second side S2 extending along a first direction X, and a third side S3 and a fourth side S4 extending along a second direction Y. The first side S1 corresponds to the side on which the terminals TM and the mounted components MC are arranged. The second side S2 is located on the opposite side of the first side S1 across the display area DA. The third side S3 and the fourth side S4 connect the first side S1 and the second side S2, respectively.

[0015] The surrounding area SA has 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.

[0016] The terminals TM are provided in the first area AR1. Mounted components MC are mounted on the terminals TM. The terminals TM are electrically connected to wiring such as scanning lines and signal lines for driving the pixels PX.

[0017] 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. The cover member 30 may also include a polarizing plate, a retardation plate, a touch panel, or the like.

[0018] The mounting component MC includes a wiring board 1 and an IC chip 2. The wiring board 1 is connected to a terminal TM. The IC chip 2 is provided on the wiring board 1. The display panel PNL may have a terminal other than the terminal TM to which the wiring board 1 is connected, and the IC chip 2 may be directly connected to the terminal. The wiring board 1 is, for example, a bendable flexible printed circuit board. The IC chip 2 has built-in a display driver that outputs signals necessary for image display, for example.

[0019] 2 is a schematic plan view showing other elements included in the display device DSP. The display device DSP further includes an adhesive AD. The adhesive AD bonds the display panel PNL and 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.

[0020] The adhesive AD has a main body portion ADa and a protrusion ADb. In this embodiment, the shape of the main body portion ADa in a plan view is rectangular. However, the shape of the main body portion ADa in a plan view is not limited to a rectangle, and may be other shapes such as a square, a circle, or an ellipse. The main body portion ADa covers the entire display area DA in a plan view. In the example of FIG. 2, the main body portion ADa also covers a part of the peripheral area SA.

[0021] The protrusion ADb protrudes from the main body portion ADa. In the example of Fig. 2, the protrusion ADb protrudes in the second direction Y from the side of the main body portion ADa on the second side S2 side. Also, in Fig. 2, the protrusion ADb is located near the center of the main body portion ADa in the first direction X. However, the protrusion ADb may be located closer to the third side S3 or the fourth side S4 than the center of the main body portion ADa in the first direction X.

[0022] The protrusions ADb are arranged in the peripheral region SA. In this embodiment, the protrusions ADb are arranged in the second region AR2. The protrusions ADb may be arranged in the first region AR1, the third region AR3, or the fourth region AR4. The adhesive AD may have a plurality of protrusions ADb. The plurality of protrusions ADb may be arranged in any one of the first region AR1, the second region AR2, the third region AR3, and the fourth region AR4, or may be distributed in two or more regions.

[0023] 3 is an enlarged view showing a schematic configuration example of the protrusion ADb. The protrusion ADb has sides A1 and A2 that intersect with the first direction X and the second direction Y, respectively. The side A1 is inclined at an angle θ1 with respect to a connection A3 between the main body ADa and the protrusion ADb. The side A2 is inclined at an angle θ2 with respect to the connection A3. The sides A1 and A2 form an angle θ3.

[0024] In FIG. 3, the angles θ1 and θ2 are acute angles. Therefore, the width WX of the protrusion ADb along the first direction X becomes smaller as it approaches the tip A4 of the protrusion ADb from the connection portion A3. For example, the angles θ1 and θ2 are equal. In FIG. 3, the angles θ1, θ2, and θ3 are each 60°. That is, in the example of FIG. 3, the protrusion ADb is in the shape of an equilateral triangle in a plan view. The shape of the protrusion ADb is not limited to an equilateral triangle. As will be described in detail later, the protrusion ADb may have a shape as shown in FIG. 18. In addition, the adhesive AD may have a plurality of protrusions ADb of the same shape, or may have a plurality of protrusions ADb of different shapes.

[0025] The length of the tip A4 along the first direction X is defined as width W1, and the length of the connection portion A3 along the first direction X is defined as width W2. For example, width W1 is smaller than width W2. In the example of FIG. 3, tip A4 corresponds to the apex of a triangle, so width W1 is substantially zero. However, width W1 does not have to be zero, for example, as in some modified examples described later with reference to FIG. 18.

[0026] 4 is a schematic cross-sectional view of the display device DSP taken along line AA in FIG. 2. The adhesive AD further has a first surface As1 and a second surface As2 opposite to the first surface As1. The first surface As1 and the second surface As2 are formed across the main body portion ADa and the protrusion ADb. The first surface As1 is adhered to the display panel PNL. The second surface As2 is adhered to the cover member 30.

[0027] 4, the tip A4 is located closer to the display area DA than the second side S2 in the second direction Y. The tip A4 is also located closer to the display area DA than the side edge 31 of the cover member 30 in the second direction Y. The tip A4 does not have to overlap with either the second side S2 or the side edge 31 in a plan view, or may overlap with at least one of the second side S2 and the side edge 31.

[0028] Next, an example of a method for manufacturing the display device DSP will be described. 5 is a flow diagram showing an example of a method for manufacturing the 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 in a peeling device (step ST2), a step of peeling the first separator (step ST3), a step of attaching a display panel (step ST4), a step of cutting the display panel (step ST5), a step of peeling the second separator (step ST6), and a step of attaching a cover member (step ST7).

[0029] Steps ST1 to ST7 will be specifically described below with reference to Figures 6 to 14. In Figures 6 to 14, (a) shows a plan view of each step, and (b) shows a side view of each step.

[0030] 6A and 6B are diagrams showing a schematic configuration example of the adhesive sheet ADS prepared in step ST1. As shown in Figs. 6A and 6B, the adhesive sheet ADS includes an adhesive AD, a first separator SP1, and a second separator SP2. As shown in Figs. 6A and 6B, the adhesive AD includes the above-mentioned main body portion ADa, a protrusion ADb, a first surface As1, and a second surface As2. The first separator SP1 is adhered to the first surface As1. The second separator SP2 is adhered to the second surface As2.

[0031] The first separator SP1 has an inner surface SP1a and an outer surface SP1b opposite the inner surface SP1a. The inner surface SP1a is bonded to the first surface As1. The second separator SP2 has an inner surface SP2a and an outer surface SP2b opposite the inner surface SP2a. The inner surface SP2a is bonded to the second surface As2. The adhesive strength between the adhesive AD and the first separator SP1 is smaller than the adhesive strength between the adhesive AD and the second separator SP2. The adhesive strength varies depending on, for example, the material of the separator and the surface roughness of the adhesive surface of the separator. The first separator SP1 and the second separator SP2 may be made of a resin material such as polyethylene terephthalate (PET).

[0032] The thicknesses of the first separator SP1 and the second separator SP2 may be different from each other. For example, the thickness of the second separator SP2 may be greater than the thickness of the first separator SP1.

[0033] As shown in Figs. 6(a) and 6(b), the first separator SP1 further has a first end SP1e and an extension region EA. The second separator SP2 further has 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 with respect to the adhesive AD. The extension region EA is located between the first end SP1e and the second end SP2e in a plan view. The extension region EA does not overlap the second separator SP2 in a plan view. The protruding direction D corresponds to the opposite direction to the second direction Y in this embodiment.

[0034] FIG. 7 is a diagram for explaining the step (step ST2) of placing the adhesive sheet ADS on the peeling device 100. As shown in FIGS. 7(a) and 7(b), the peeling device 100 includes a stage 101, a roller 102, and a peeling tape 103. The stage 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 surfaces parallel to the XY plane. As shown in FIG. 7(b), the first mounting surface 101a is formed at a position higher than the second mounting surface 101b.

[0035] The roller 102 is formed in a cylindrical shape extending in the first direction X. The peeling tape 103 is in contact with the surface of the roller 102. The roller 102 rotates to feed the peeling tape 103. For example, an adhesive is formed on the surface of the peeling tape 103.

[0036] In the process of step ST2, the adhesive sheet ADS is placed on the stage 101 so 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 stage 101 further includes a suction mechanism 110 for suctioning the adhesive sheet ADS. The suction mechanism 110 includes a plurality of suction holes 111 that communicate with the second mounting surface 101b. The plurality of suction holes 111 are connected to, for example, a vacuum pump (not shown). When the vacuum pump is operated, the plurality of suction holes 111 are put into a vacuum state, and the adhesive sheet ADS is fixed to the stage 101.

[0037] 8 to 10 are diagrams for explaining the process of peeling off the first separator SP1. First, as shown in Fig. 8(a) and (b), the surface of the peeling tape 103 is brought into contact with the first end portion SP1e of the first separator SP1.

[0038] 9(a) and 9(b), the roller 102 is rotated and moved in the second direction Y while the peeling tape 103 is in contact with the outer surface SP1b. As a result, the first separator SP1 is sent together with the peeling tape 103 and peeled off from the adhesive AD.

[0039] 10(a) and 10(b), the roller 102 is moved to an end of the first separator SP1, and the first separator SP1 is peeled off from the adhesive AD. This exposes the first surface As1, which is the adhesive surface. As described above, the adhesive force between the adhesive AD and the first separator SP1 is smaller than the adhesive force between the adhesive AD and the second separator SP2. Therefore, when the roller 102 is moved to the end of the first separator SP1, the first separator SP1 is peeled off from the adhesive AD without the second separator SP2 and the adhesive AD being peeled off.

[0040] Fig. 11 is a diagram for explaining the step (step ST4) of attaching the display panel PNL to the adhesive AD. In the process of step ST4, as shown in Fig. 11(b), the display panel PNL is attached to the first surface As1 of the adhesive AD. In the example of Fig. 11(a), the display panel PNL is larger than the adhesive AD and the second separator SP2 in a plan view.

[0041] FIG. 12 is a diagram for explaining the step (step ST5) of cutting the display panel PNL. In the process of step ST5, the display panel PNL is cut along the cut lines CL as shown in FIGS. 12(a) and 12(b). In the example of FIG. 12(a), the display panel PNL is cut along two cut lines CL along the first direction X and two cut lines CL along the second direction Y. The four cut lines CL are set outside the second separator SP2. That is, in the example of FIG. 12, the cut lines CL do not overlap with the protrusions ADb.

[0042] In one example, a laser device 200 is used to cut the display panel PNL as shown in Fig. 12(b). The laser light LZ emitted from the laser device 200 is scanned along the cut line CL to cut the display panel PNL. In the example of Fig. 12(b), two laser devices 200 are used, but the display panel PNL may be cut using one laser device 200.

[0043] 12, only the display panel PNL is cut by the laser light LZ, but the adhesive AD and the second separator SP2 may be cut together with the display panel PNL by the laser light LZ. In that case, the cut line CL overlaps with the adhesive AD and the second separator SP2 in a plan view.

[0044] Fig. 13 is a diagram for explaining the step (step ST6) of peeling off the second separator SP2. In the process of step ST6, as shown in Figs. 13(a) and (b), the second separator SP2 is peeled off from the adhesive AD. In one example, the second separator SP2 can be peeled off using a peeling device having a configuration similar to that of the peeling device 100 shown in Figs. 7 to 10. As shown in Fig. 13(b), by peeling off the second separator SP2 from the adhesive AD, the second surface As2, which is the adhesive surface, is exposed.

[0045] Fig. 14 is a diagram for explaining the step (step ST7) of attaching the cover member 30. In the process of step ST7, as shown in Fig. 14(b), the cover member 30 is attached to the second surface As2 of the adhesive AD. In the example of Fig. 14(a), the cover member 30 is larger than the adhesive AD and the display panel PNL in a plan view. Through the above steps, the display device DSP is manufactured.

[0046] According to this embodiment, the adhesive AD of the adhesive sheet ADS has a protrusion ADb protruding from the main body portion ADa, as shown in Fig. 6. In the process of peeling off the first separator SP1 shown in Fig. 7 to Fig. 10, if the adhesive AD does not have a protrusion ADb, the first separator SP1 is peeled off from the side of the main body portion ADa along the first direction X. In this case, the peeling force peeling the first separator SP1 from the adhesive AD is distributed over the entire side, and there is a possibility that the first separator SP1 cannot be peeled off smoothly.

[0047] On the other hand, when the adhesive AD has a protrusion ADb as in this embodiment, the first separator SP1 is first peeled off from the tip A4. The tip A4 is shorter in length in the first direction X than the side of the main body portion ADa. Therefore, the peeling force at the tip A4 is greater than the peeling force at the side when the protrusion ADb is not present. This makes it easier for the first separator SP1 to peel off from the adhesive AD.

[0048] Also, as shown in FIG. 3, the width W1 of the tip A4 is smaller than the width W2 of the connection portion A3. This makes the width of the tip A4 smaller, and therefore the peeling force at the tip A4 is greater. Therefore, the first separator SP1 is more easily peeled off from the adhesive AD. Furthermore, in the example of FIG. 3, the protrusion ADb has a triangular shape with the tip A4 as its apex. In this case, the first separator SP1 is peeled off smoothly such that the width of the peeling line with the adhesive AD gradually increases from the tip A4.

[0049] Also, the first separator SP1 has an extension region EA that is located between the first end portion SP1e and the second end portion SP2e in a plan view and does not overlap with the second separator SP2, as shown in Fig. 6. A part of the extension region EA can be placed on the first mounting surface 101a of the stage 101, as shown in Fig. 7. This allows the roller 102 to be pressed against the extension region EA on the first mounting surface 101a when peeling off the first separator SP1, thereby allowing the peeling tape 103 and the first separator SP1 to be well adhered to each other.

[0050] 2, the main body portion ADa covers the entire display area DA in a plan view, which makes it possible to suppress degradation of display quality due to light scattering at the edge of the adhesive AD.

[0051] Moreover, the protrusion ADb is disposed in a second area AR2 opposite to the first area AR1 in which the terminals TM and the mounting components MC mounted on the terminals TM are provided, thereby making it possible to prevent interference between the protrusion ADb and the mounting components MC and the terminals TM.

[0052] Next, other configuration examples of the display device DSP, adhesive sheet ADS, and protrusion ADb will be described. Elements that are the same as or similar to the above-mentioned display device DSP are given the same reference numerals, and duplicated descriptions will be omitted as appropriate.

[0053] 15 is a plan view showing another configuration example of the display device DSP. The tip A4 of the protrusion ADb is formed of a side extending along the first direction X. The tip A4 overlaps the second side S2 in plan view.

[0054] The display device DSP of FIG. 15 can be manufactured by, for example, setting a cut line CL on the protrusion ADb and cutting the protrusion ADb together with the display panel PNL in the step of cutting the display panel PNL shown in FIG.

[0055] In the display device DSP of Fig. 15, the second area AR2 can be narrowed. Therefore, the frame of the display device DSP can be narrowed. In addition, the display device DSP of Fig. 15 can also obtain the same effects as those described above.

[0056] 16 is a plan view showing another configuration example of the display device DSP. The protrusion ADb is disposed in the first area AR1. The protrusion ADb is also disposed between the mounting component MC and the display area DA (between the terminal TM and the display area DA).

[0057] In the display device DSP of Fig. 16, the peripheral area SA excluding the first area AR1 can be narrowed compared to the display devices DSP of Fig. 2 and Fig. 15. Therefore, the frame of the display device DSP can be narrowed. In addition, the display device DSP of Fig. 16 can also obtain the same effects as those described above.

[0058] FIG. 17 is a diagram showing another example of the configuration of the adhesive sheet ADS. FIG. 17(a) shows a plan view of the adhesive sheet ADS, and FIG. 17(b) shows a side view of the adhesive sheet ADS. The main body portion ADa, the first separator SP1, and the second separator SP2 are each formed in a circular shape in a plan view. The main body portion ADa has a side edge A5 that is curved in a plan view. The protrusion ADb protrudes from the side edge A5. In the example of FIG. 17, the first separator SP1 and the second separator SP2 are formed in a circular shape, but they may be formed in a rectangular shape. The adhesive sheet ADS of FIG. 17 can also provide the same effects as those described above.

[0059] Fig. 18 is a diagram showing another configuration example of the protrusion ADb. The protrusion ADb in Fig. 18(a) has an isosceles triangle shape in a plan view. In the illustrated example, the interior angle at the tip A4 is smaller than the other two interior angles. As another example, the interior angle at the tip A4 may be larger than the other two interior angles.

[0060] The protrusion ADb in Fig. 18(b) and (c) has a right-angled triangular shape having a side perpendicular to the connection portion A3 in a plan view. The protrusion ADb in Fig. 18(c) has a shape symmetrical to the protrusion ADb in Fig. 18(b).

[0061] The protrusion ADb in Fig. 18(d) is square in plan view. In this case, the width W1 of the tip A4 is equal to the width W2 of the connection portion A3. The protrusion ADb may be rectangular in plan view.

[0062] 18(e), the protrusion ADb has a trapezoidal shape with a tip A4 parallel to and shorter than the connection portion A3 in plan view. That is, the width W1 of the tip A4 is smaller than the width W2 of the connection portion A3.

[0063] 18(f) has a shape in which the width decreases stepwise from the connection A3 to the tip A4 in plan view. In this shape, too, the width W1 of the tip A4 is smaller than the width W2 of the connection A3.

[0064] The protrusion ADb in FIG. 18(g) has a triangular shape with a rounded tip A4 in plan view.

[0065] The protrusion ADb in FIG. 18(h) has a shape having a curve including a tip A4 in a plan view and two sides perpendicular to the connection portion A3.

[0066] The protrusions ADb in Fig. 18(a) to (h) can also provide the same effects as those described above. In addition, various shapes can be applied to the protrusions ADb.

[0067] All adhesive sheets and display devices that can be implemented by a person skilled in the art through appropriate design modifications based on the adhesive sheets and display devices described above as embodiments of the present invention also fall within the scope of the present invention as long as they include the gist of the present invention.

[0068] Within the scope of the concept of the present invention, a person skilled in the art may conceive of various modifications, and such modifications are also understood to fall within the scope of the present invention. For example, those in which a person skilled in the art appropriately adds or removes components or modifies the design of the above-mentioned embodiment, or adds or omits steps or modifies conditions, are also included in the scope of the present invention as long as they include the gist of the present invention.

[0069] Furthermore, with regard to other effects and advantages brought about by the aspects described in the above-mentioned embodiments, those which are obvious from the description in this specification or which can be appropriately thought up by a person skilled in the art are naturally understood to be brought about by the present invention. [Explanation of symbols]

[0070] DSP...display device, PNL...display panel, 30...cover member, ADS...adhesive sheet, AD...adhesive, ADa...main body, ADb...protrusion, A3...connection portion, A4...tip, SP1...first separator, SP2...second separator, 100...peeling device, 200...laser device.

Claims

1. an adhesive having a main body, a protrusion protruding from the main body, a first surface formed across the main body and the protrusion, and a second surface located on the opposite side to the first surface; a first separator bonded to the first surface; a second separator adhered to the second surface; An adhesive sheet comprising:

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

3. an adhesive strength between the adhesive and the first separator is smaller than an adhesive strength between the adhesive and the second separator; The adhesive sheet of claim 1 .

4. the first separator has a first end portion located in a protruding direction of the protrusion, the second separator has a second end portion located in a protruding direction of the protrusion, the first separator further has a first region located between the first end and the second end in a plan view and not overlapping with the second separator; The adhesive sheet according to claim 3.

5. The main body has a side edge that is curved in a plan view, The protrusion protrudes from the side edge. The adhesive sheet according to any one of claims 1 to 4.

6. a display panel having a display area for displaying an image; a cover member facing the display panel; an adhesive having a main body, a protrusion protruding from the main body, a first surface bonded to the display panel and formed across the main body and the protrusion, and a second surface bonded to the cover member and positioned on the opposite side to the first surface; A display device comprising:

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

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

9. the display panel further has a peripheral area surrounding the display area, The protrusion is disposed in the peripheral region. The display device according to any one of claims 6 to 8.

10. the display panel further has a first side and a second side located on the opposite side of the display area from the first side, The peripheral region is a first region provided with a terminal for mounting a mounting component and located between the first side and the display region; a second region located between the second side and the display region; having The protrusion is disposed in the second region. The display device according to claim 9.

11. The second side overlaps with the tip of the protrusion in a plan view. The display device according to claim 10.

12. The display panel further has a first side. the peripheral region has a first region provided with terminals for mounting components and located between the first side and the display region; The protrusion is disposed in the first region. The display device according to claim 9.

13. The protrusion is disposed between the mounting component and the display area. The display device according to claim 11.

Images