Display device

Abstract

A display device (101) comprises a metal first cushion material (5) which is positioned in a layer that is above a first support substrate (1) and a second support substrate (2) and below a reinforcement plate (4), and which includes a first portion (9) that overlaps a third region (8) in plan view.

Description

display device

[0001] The present disclosure relates to a display device.

[0002] Patent Document 1 discloses a display device in which slits are formed in the bent portion in order to improve the bendability of the bent portion.

[0003] U.S. Patent Publication No. 2016 / 0357052

[0004] The display device disclosed in Patent Document 1 has low resistance to local impacts on the bent portion. For example, the display device disclosed in Patent Document 1 has low resistance to local impacts on the bent portion when a point-like object hits the top surface of the bent portion.

[0005] A display device according to one aspect of the present disclosure comprises a flexible display panel, a first support substrate supporting the display panel, a second support substrate positioned at a distance from the first support substrate and supporting the display panel, a reinforcing plate positioned above the first support substrate and the second support substrate and below the display panel, the reinforcing plate including a first region positioned between the first support substrate and the display panel, a second region positioned between the second support substrate and the display panel, and a third region connecting the first region and the second region, and being bendable at the third region, and a first cushion material made of metal positioned above the first support substrate and the second support substrate and below the reinforcing plate, the first cushion material including a first portion overlapping the third region in a planar view.

[0006] According to one aspect of the present disclosure, a display device having high resistance to localized impacts on bent portions can be realized.

[0007] 1 is a cross-sectional view showing a schematic configuration of a display device according to a first embodiment of the present disclosure; FIG. 2 is a plan view showing a schematic configuration of a reinforcing plate; FIG. 3 is a plan view showing a schematic configuration of a first cushion material according to the first embodiment of the present disclosure; FIG. 4 is a cross-sectional view showing a schematic configuration of a display device according to a comparative example; FIG. 5 is a cross-sectional view illustrating a display device according to a comparative example when bent; FIG. 6 is a cross-sectional view illustrating a display device according to a comparative example when bent; FIG. 7 is a view showing a positional relationship between the first cushion material according to the first embodiment of the present disclosure and a member around its periphery; FIG. 8 is a plan view showing another example of forming a plurality of first slits and a plurality of second slits; FIG. 9 is a cross-sectional view showing a schematic configuration of a display device according to a second embodiment of the present disclosure; FIG. 10 is a view illustrating an advantage of a configuration in which a display device according to the present disclosure includes first slits and second slits; FIG. 11 is a view illustrating an advantage of a configuration in which a display device according to the present disclosure includes first slits and second slits; FIG. 12 is a table showing an example of test results regarding the suitability of candidate materials for the second cushion material as a material; and FIG. 13 is a view showing an example of stress distribution when a display device according to a comparative example is bent into a drop shape.

[0008] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following describes an embodiment of the present disclosure. For convenience of explanation, the same reference numerals are used to designate components having the same functions as those previously described, and the description thereof may not be repeated.

[0009] 1 is a cross-sectional view showing a schematic configuration of a display device 101 according to a first embodiment of the present disclosure. The display device 101 includes a first support substrate 1, a second support substrate 2, a display panel 3, a reinforcing plate 4, and a first cushion material 5.

[0010] The first support substrate 1 and the second support substrate 2 support the display panel 3. Specifically, the first support substrate 1 and the second support substrate 2 are substrates that support the display panel 3, the reinforcing plate 4, the first cushion material 5, etc. The first support substrate 1 and the second support substrate 2 may each be part of the housing of the display device 101. The second support substrate 2 is positioned with a gap between them.

[0011] The display panel 3 has a display unit 51, a touch panel 52, a polarizing plate 53, and a window film 54. The display panel 3 is located above the first support substrate 1 and the second support substrate 2. The display panel 3 is flexible. The display unit 51 may include an OLED (organic light-emitting diode) or a QLED (quantum dot light-emitting diode). The display unit 51 and the touch panel 52 are bonded together with an adhesive 55. The touch panel 52 and the polarizing plate 53 are bonded together with an adhesive 56. The polarizing plate 53 and the window film 54 are bonded together with an adhesive 57. An example of each of the adhesives 55 to 57 is OCA (optically transparent adhesive).

[0012] The touch panel 52 may include an electrode layer for touch operation. The touch panel 52 may be built into the display unit 51. The polarizing plate 53 may have a function of improving the reflection characteristics within the display device 101 of external light that has entered the display device 101. The polarizing plate 53 may be of a vapor deposition type. The window film 54 may have scratch resistance, anti-reflection, and anti-fouling functions for the display device 101.

[0013] FIG. 2 is a plan view showing a schematic configuration of the reinforcing plate 4. The reinforcing plate 4 is intended to increase the rigidity of the entire display device 101. The reinforcing plate 4 is located above the first support substrate 1 and the second support substrate 2 and below the display panel 3. The reinforcing plate 4 includes a first region 6, a second region 7, and a third region 8. The first region 6 is located between the first support substrate 1 and the display panel 3. The second region 7 is located between the second support substrate 2 and the display panel 3. The third region 8 connects the first region 6 and the second region 7. The reinforcing plate 4 can be bent at the third region 8. In a plan view, a bending portion of the display device 101 is formed in the portion overlapping the third region 8. The plan view refers to a plan view of the display device 101.

[0014] 3 is a plan view showing a schematic configuration of the first cushion material 5 according to the first embodiment of the present disclosure. The first cushion material 5 is located above the first support substrate 1 and the second support substrate 2 and below the reinforcing plate 4. The first cushion material 5 includes a first portion 9 that overlaps with the third region 8 in a plan view. The first cushion material 5 is made of metal.

[0015] Since the first portion 9 of the first cushion material 5 absorbs localized impacts on the bent portion of the display device 101, it is possible to realize a display device 101 that is highly resistant to localized impacts on the bent portion.

[0016] The first cushion material 5 may be located above the first support substrate 1 and the second support substrate 2 and below the reinforcing plate 4, and may include a second portion 10 that overlaps the third region 8 side of the first region 6 in a plan view. This makes it easy to fix the first cushion material 5 to the first support substrate 1, as the first support substrate 1 and the first cushion material 5 face each other.

[0017] The second portion 10 may include a first slit 11. This makes it possible to impart stretchability to the first cushion material 5, thereby reducing the risk that the first cushion material 5 will impair the flexibility of the bent portion of the display device 101. To further enhance the flexibility, the second portion 10 may include a first groove 21. The first slit 11 penetrates the second portion 10 in the thickness direction of the first cushion material 5, while the first groove 21 does not penetrate the second portion 10 in the thickness direction of the first cushion material 5.

[0018] The display device 101 may include a first adhesive 12 that bonds the first support substrate 1 and the second portion 10 together. This allows the first cushion material 5 to be fixed to the first support substrate 1.

[0019] The display device 101 includes a first adhesive layer 13 that bonds the first support substrate 1 and the first region 6. In a plan view, the first adhesive 12 is positioned so as to overlap at least a portion of the second portion 10 but not overlap the first adhesive layer 13, and the sum T22 of the thickness of the second portion 10 and the thickness of the first adhesive 12 may be equal to or less than the thickness T13 of the first adhesive layer 13. This reduces the risk that the second portion 10 and the first adhesive 12 will push the first region 6 away from the first support substrate 1.

[0020] The first cushion material 5 is bonded to the first support substrate 1, and the first cushion material 5 may include a first slit 11 between the first portion 9 and the bonded portion of the first cushion material 5 and the first support substrate 1. This makes it possible to impart stretchability to the first cushion material 5, thereby reducing the risk that the first cushion material 5 will impair the flexibility of the bent portion of the display device 101. In order to further enhance the stretchability, the first cushion material 5 may include a first groove 21 between the first portion 9 and the bonded portion of the first cushion material 5 and the first support substrate 1.

[0021] The first cushion material 5 may be located above the first support substrate 1 and the second support substrate 2 and below the reinforcing plate 4, and may include a third portion 14 that overlaps the third region 8 side of the second region 7 in a plan view. This makes it easy to fix the first cushion material 5 to the second support substrate 2, as the second support substrate 2 and the first cushion material 5 face each other.

[0022] The third region 14 may include a second slit 15. This makes it possible to impart stretchability to the first cushion material 5, thereby reducing the risk that the first cushion material 5 will impair the flexibility of the bent portion of the display device 101. To further enhance the flexibility, the third region 14 may include a second groove 22. The second slit 15 penetrates the third region 14 in the thickness direction of the first cushion material 5, while the second groove 22 does not penetrate the third region 14 in the thickness direction of the first cushion material 5.

[0023] The display device 101 may include a second adhesive 16 that bonds the second support substrate 2 and the third portion 14 together. This allows the first cushion material 5 to be fixed to the second support substrate 2.

[0024] The display device 101 includes a second adhesive layer 17 that bonds the second support substrate 2 and the second region 7. In a plan view, the second adhesive 16 is positioned so as to overlap at least a portion of the third portion 14 but not overlap the second adhesive layer 17, and the sum T30 of the thickness of the third portion 14 and the thickness of the second adhesive 16 may be equal to or less than the thickness T17 of the second adhesive layer 17. This reduces the risk that the third portion 14 and the second adhesive 16 will push the second region 7 away from the second support substrate 2.

[0025] The first cushion material 5 is bonded to the second support substrate 2, and the first cushion material 5 may include a second slit 15 between the first portion 9 and the bonded portion of the first cushion material 5 and the second support substrate 2. This makes it possible to impart stretchability to the first cushion material 5, thereby reducing the risk that the first cushion material 5 will impair the flexibility of the bent portion of the display device 101. In order to further enhance the stretchability, the first cushion material 5 may include a second groove 22 between the first portion 9 and the bonded portion of the first cushion material 5 and the second support substrate 2.

[0026] The first cushion material 5 may contain SUS (Steel Use Stainless), which sufficiently reduces local impacts on the bent portions of the display device 101, thereby realizing a display device 101 with sufficiently high resistance to local impacts on the bent portions.

[0027] The display device 101 may include a second cushion material 18 located above the reinforcing plate 4 and below the display panel 3. The reinforcing plate 4 and the second cushion material 18 are bonded together with an adhesive 58. The second cushion material 18 and the display panel 3 (display unit 51) are bonded together with an adhesive 59. This reduces impact on the entire display device 101, thereby realizing a display device 101 that is highly resistant to impact on the entire display device 101. An example of each adhesive material 58 and 59 is OCA.

[0028] The second cushion material 18 may be made of plastic or metal. The second cushion material 18 may include PET (polyethylene terephthalate). This makes it easy to realize the second cushion material 18.

[0029] The third region 8 may include a third slit 19. This makes it easier to bend the reinforcing plate 4 at the third region 8. To make the bending easier, the third region 8 may include a third groove 23.

[0030] The display device 101 includes a hinge 20 that is located in the gap between the first support substrate 1 and the second support substrate 2 and movably connects the first support substrate 1 and the second support substrate 2. In a plan view, the hinge 20 overlaps with the first portion 9.

[0031] According to the display device 101, the first cushion material 5 is provided between the reinforcing plate 4 and the hinge 20 at the bent portion, dispersing the impact and preventing local deformation, thereby improving the impact resistance.

[0032] The adhesive surface of the first cushion material 5 may be on the side of the first support substrate 1 and the second support substrate 2. The first cushion material 5 is separate from the reinforcing plate 4. The first cushion material 5 is separate from the hinge 20.

[0033] The display device 101 may include, in a plan view, a first slit 11 between the first adhesive 12 and the hinge 20. The display device 101 may include, in a plan view, a second slit 15 between the second adhesive 16 and the hinge 20.

[0034] The thickness of the first cushion material 5 may be 30 μm or more and 50 μm or less. If the thickness of the first cushion material 5 is less than 30 μm, the resistance to local impacts on the bent portion may be insufficient. If the thickness of the first cushion material 5 is more than 50 μm, the flexibility of the bent portion of the display device 101 may be impaired.

[0035] The material of the first cushion material 5 may be a metal having a hardness of HV 370 or more. Since SUS is an easily available metal having a hardness of HV 370 or more, the material of the first cushion material 5 may be SUS.

[0036] The material of the first cushion material 5 may be the same as the material of the reinforcing plate 4. The material of the reinforcing plate 4 may be SUS. The thickness of the reinforcing plate 4 may be 150 μm or more and 200 μm or less.

[0037] The display device 101 may include a first cushion material 5 separate from the reinforcing plate 4. By forming a first slit 11 and a second slit 15 in the first cushion material 5 and imparting stretchability to the first cushion material 5, movement of the end of the first cushion material 5 may not be restricted when the display device 101 is bent. That is, the first slit 11 and the second slit 15 may expand and contract to absorb the difference between the inner and outer peripheries of the bending portion of the display device 101 when the display device 101 is bent. To ensure the stretchability of the first cushion material 5, the first slits 11 and the second slits 15 are not directly fixed to any of the first support substrate 1, the second support substrate 2, and the reinforcing plate 4. The first cushion material 5 may be bonded to the first support substrate 1 only with the first adhesive 12 and to the second support substrate 2 only with the second adhesive 16. The first cushion material 5 is not bonded to the reinforcing plate 4 or the hinge 20.

[0038] Since the portion attached to the first support substrate 1 or the second support substrate 2 has high impact resistance, the first cushion material 5 only needs to be sized to sufficiently cover the hinge 20 in a plan view. In a plan view, the first cushion material 5 may be positioned over substantially the entire display device 101 on the outer side of the display device 101 beyond the first slit 11 and the outer side of the display device 101 beyond the second slit 15.

[0039] Since plastic film has low resistance to localized impacts, the first cushion material 5 may be made of SUS, which has high resistance to localized impacts.

[0040] As shown in FIG. 2 , the reinforcing plate 4 has a bendable area and a non-bendable area, and a third slit 19 is formed in the bendable area by etching, laser processing, or the like. The area where the third slit 19 is formed allows the reinforcing plate 4 to bend. This type of structure is generally called a living hinge. The non-bendable area of ​​the reinforcing plate 4 is a hard plate in order to increase the rigidity of the display device 101 for the purpose of improving the handling performance of the display device 101, etc. The bendable area of ​​the reinforcing plate 4 where the third slit 19 is formed can deform when subjected to an impact. The bendable area of ​​the reinforcing plate 4 corresponds to the third area 8, and the non-bendable area of ​​the reinforcing plate 4 corresponds to the first area 6 and the second area 7.

[0041] 4 is a cross-sectional view showing a schematic configuration of a display device 102 according to a comparative example. The display device 102 can be interpreted as being the display device 101 from which the first cushion material 5 has been omitted.

[0042] 5 and 6 are cross-sectional views illustrating the display device 102 when bent. For simplicity of explanation, components other than the first support substrate 1, the second support substrate 2, the display panel 3, and the hinge 20 are omitted from illustration in Fig. 5 and Fig. 6. Fig. 5 shows the display device 102 when bent, and Fig. 6 shows the display device 102 when not bent.

[0043] 5 and 6 , the surface of the hinge 20 has steps 60 due to dents, joints, screws, etc., and when the display device 102 receives an impact against the steps 60, local stress is applied. The display device 102 has low resistance to such stress. For example, because the third region 8 and the hinge 20 are located above and below each other, in the display device 102, such stress may deform the third region 8, and the deformed third region 8 may damage the display panel 3.

[0044] In the display device 101, a first cushion material 5 is added between the reinforcing plate 4 (third region 8) and the hinge 20 compared to the display device 102, and is bonded to the first support substrate 1 and the second support substrate 2 by a first adhesive material 12 and a second adhesive material 16, respectively. A first slit 11 and a second slit 15 are formed on both ends of the first cushion material 5, so that the first cushion material 5 stretches when the display device 101 is bent.

[0045] 7 is a diagram showing the positional relationship between the first cushion material 5 and the members around its periphery according to the first embodiment of the present disclosure. In a cross-sectional view of the display device 101, the following can be said.

[0046] Distance D26, which is the minimum distance between the first slits 11 and the second slits 15, may be larger than distance D3 between the first support substrate 1 and the second support substrate 2. Assuming that distance D3 is about 36 mm, distance D26 may be about 40 mm. The first slits 11 may be formed within a range of 5 mm or more, and the second slits 15 may be formed within a range of 5 mm or more.

[0047] FIG. 8 is a plan view showing another example of forming the plurality of first slits 11 and the plurality of second slits 15. In FIG.

[0048] 7, the plurality of first slits 11 are formed in two rows, but this is not limiting, and one first slit 11 may be formed, or a plurality of first slits 11 may be formed in one row or three or more rows. For example, as shown in FIG. 8, the plurality of first slits 11 may be formed in four rows. The plurality of first slits 11 may be arranged regularly with respect to each other, randomly with respect to each other, or a combination of regularly and randomly with respect to each other.

[0049] 7, the plurality of second slits 15 are formed in two rows, but this is not limited thereto, and one second slit 15 may be formed, or a plurality of second slits 15 may be formed in one row or three or more rows. For example, as shown in FIG. 8, the plurality of second slits 15 may be formed in four rows. The plurality of second slits 15 may be arranged regularly with respect to each other, randomly with respect to each other, or a combination of regularly and randomly with respect to each other.

[0050] 9 is a cross-sectional view showing a schematic configuration of a display device 101 according to a second embodiment of the present disclosure. The display device 101 does not necessarily have to include the first slit 11 and / or the second slit 15.

[0051] (Additional Note 1) The display device 101 includes a first cushion material 5 to prevent damage to the display panel 3 caused by a step 60 (see FIGS. 5 and 6 ) in the bendable range of the reinforcing plate 4. This achieves both flexibility and resistance to localized impacts for the display device 101. To ensure a place to fix the first cushion material 5, a portion of the first cushion material 5 faces the first support substrate 1, and the first support substrate 1 and the first cushion material 5 are bonded together with a first adhesive 12. To ensure a place to fix the first cushion material 5, a portion of the first cushion material 5 faces the second support substrate 2, and the second support substrate 2 and the first cushion material 5 are bonded together with a second adhesive 16.

[0052] 10 and 11 are diagrams illustrating the advantages of a configuration in which the display device 101 includes the first slit 11 and the second slit 15. For simplicity, components other than the display panel 3, the reinforcing plate 4, and the first cushion material 5 are omitted from FIGS. 10 and 11 . FIG. 10 shows a state in which the display panel 3 and the reinforcing plate 4 cannot bend into a drop shape, and FIG. 11 shows a comparison of the perimeters of the display panel 3, the reinforcing plate 4, and the first cushion material 5 when the display device 101 is bent. Bending into a drop shape means bending one surface inward at the center of the bent portion and bending it outward so that the periphery of the bent portion is warped.

[0053] If the display device 101 does not include the first slit 11 and / or the second slit 15, it may be difficult for the display panel 3 and the reinforcing plate 4 to bend into a drop shape. The following two reasons can be cited as reasons for this.

[0054] 11 , there is a difference in circumferential length among the display panel 3, the reinforcing plate 4, and the first cushion material 5 at the bent portion of the display device 101. The second point is that the degree of expansion and contraction of the first cushion material 5 is small.

[0055] In the display device 101, the reinforcing plate 4 is stretchable by including the third slit 19, and relieves stress by slightly stretching. If the display device 101 does not include the first slit 11 and / or the second slit 15, the first cushion material 5 restricts the stretching of the reinforcing plate 4, making it difficult to absorb stress and making it difficult for the display panel 3 and the reinforcing plate 4 to bend into a drop shape.

[0056] Therefore, in the display device 101 that bends into a drop shape, the configuration including the first slit 11 and the second slit 15 is significant for imparting stretchability to the first cushion material 5. The first slit 11 and the second slit 15 are positioned so as not to overlap the first adhesive material 12 and the second adhesive material 16, respectively, in a plan view in order to ensure the stretchability of the first cushion material 5. In order to cover the entire hinge 20, the end of the first support substrate 1 on the hinge 20 side, and the end of the second support substrate 2 on the hinge 20 side, the distance D26 is made larger than the distance D3 (see FIG. 7 ). This allows the expansion of the first cushion material 5 to follow the expansion of the third region 8 of the reinforcing plate 4, allowing the display panel 3 and the reinforcing plate 4 to bend into a drop shape.

[0057] (Additional Note 2) Fig. 12 is a table showing an example of test results relating to the suitability of each candidate material for the second cushion material 18 as a material for the second cushion material 18. Fig. 13 is a diagram showing an example of stress distribution when the display device 102 is bent into a drop shape.

[0058] In the display device 102, by using SUS as the material for the second cushion material 18, deformation of the reinforcing plate 4 can be suppressed, and impact resistance is improved.

[0059] When the display device 102 is bent into a drop shape, compressive stress occurs at the center 61 of the bent portion, and peeling stress occurs at the periphery 62 of the bent portion, as shown in Figure 13. An OCA that serves to relieve this stress is used to bond the components that make up the display device 102, but if this stress cannot be fully relieved, peeling may occur at the OCA interface. If this stress cannot be fully relieved and the components are firmly bonded by the OCA, peeling may occur in layers, for example, within the display panel 3.

[0060] When SUS is used as the material for the second cushion material 18, the Young's modulus of the second cushion material 18 is high, and therefore peel stress is large, compared to when PET is used as the material for the second cushion material 18, which may result in poor flexibility of the display device 102. By using PET as the material for the second cushion material 18, the flexibility of the display device 102 is improved, but impact resistance may be poor.

[0061] The inventors of the present application considered using SUS as the material for the second cushion material 18 in the display device 102 to improve impact resistance, but when SUS is used as the material for the second cushion material 18, there is a risk of peeling at the OCA interface as described above. Using PET as the material for the second cushion material 18 can reduce the risk of such peeling, but the resistance to localized impacts on the bending portion of the display device 102 is low. It can be said that the display device 101 including the first cushion material 5 made of SUS and the second cushion material 18 made of PET has high resistance to localized impacts on the bending portion of the display device 101 while reducing the risk of such peeling.

[0062] The present disclosure is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present disclosure. Furthermore, new technical features can be formed by combining the technical means disclosed in each embodiment.

[0063] 1 First support substrate 2 Second support substrate 3 Display panel 4 Reinforcing plate 5 First cushion material 6 First region 7 Second region 8 Third region 9 First portion 10 Second portion 11 First slit 12 First adhesive material 13 First adhesive layer 14 Third portion 15 Second slit 16 Second adhesive material 17 Second adhesive layer 18 Second cushion material 19 Third slit 20 Hinge 21 First groove 22 Second groove 23 Third groove 101 Display device T13 Thickness of first adhesive layer T17 Thickness of second adhesive layer T22 Sum of thickness of second portion and thickness of first adhesive material T30 Sum of thickness of third portion and thickness of second adhesive material

Claims

1. A display device comprising: a flexible display panel; a first support substrate that supports the display panel; a second support substrate that is positioned with a gap between it and the first support substrate and that supports the display panel; a reinforcing plate that is positioned above the first support substrate and the second support substrate and below the display panel, the reinforcing plate including a first region that is positioned between the first support substrate and the display panel, a second region that is positioned between the second support substrate and the display panel, and a third region that connects the first region and the second region, and that is bendable at the third region; and a first cushion material that is positioned above the first support substrate and the second support substrate and below the reinforcing plate, and that includes a first portion that overlaps the third region in a planar view.

2. The display device described in claim 1, wherein the first cushion material is located above the first support substrate and the second support substrate and below the reinforcing plate, and includes a second portion that overlaps the third region side of the first region in a planar view.

3. The display device according to claim 2, wherein the second portion includes a first slit.

4. The display device according to claim 3, wherein the second portion includes a first groove.

5. The display device according to claim 2, further comprising a first adhesive material that bonds the first support substrate and the second portion.

6. A display device as described in claim 5, comprising a first adhesive layer that bonds the first support substrate and the first region, wherein, in a planar view, the first adhesive overlaps at least a portion of the second portion but is positioned so as not to overlap the first adhesive layer, and the sum of the thickness of the second portion and the thickness of the first adhesive is less than or equal to the thickness of the first adhesive layer.

7. The display device according to claim 1, wherein the first cushion material is bonded to the first support substrate, and the first cushion material includes a first slit between the first portion and the bonded portion of the first cushion material and the first support substrate.

8. The display device according to claim 7, wherein the first cushion material includes a first groove between the first portion and the adhesive portion of the first cushion material and the first support substrate.

9. A display device described in any one of claims 1 to 8, wherein the first cushion material is located above the first support substrate and the second support substrate and below the reinforcing plate, and includes a third portion that overlaps the third region side of the second region in a planar view.

10. The display device according to claim 9, wherein the third portion includes a second slit.

11. The display device according to claim 10, wherein the third portion includes a second groove.

12. The display device according to any one of claims 9 to 11, further comprising a second adhesive material that bonds the second support substrate and the third portion.

13. A display device as described in claim 12, comprising a second adhesive layer that bonds the second support substrate and the second region, wherein, in a planar view, the second adhesive overlaps at least a portion of the third portion but is positioned so as not to overlap the second adhesive layer, and the sum of the thickness of the third portion and the thickness of the second adhesive is less than or equal to the thickness of the second adhesive layer.

14. The display device of claim 1, wherein the first cushion material is bonded to the second support substrate, and the first cushion material includes a second slit between the first portion and the bonded portion of the first cushion material and the second support substrate.

15. The display device according to claim 14, wherein the first cushion material includes a second groove between the first portion and the adhesive portion of the first cushion material and the second support substrate.

16. The display device according to any one of claims 1 to 15, wherein the first cushion material includes SUS.

17. The display device according to any one of claims 1 to 16, further comprising a second cushion material located above the reinforcing plate and below the display panel.

18. The display device according to claim 17, wherein the second cushion material is made of plastic or metal.

19. The display device according to claim 18, wherein the second cushioning material includes PET.

20. A display device according to any one of claims 1 to 19, wherein the third region includes a third slit.

21. The display device according to claim 20, wherein the third region includes a third groove.

22. A display device according to any one of claims 1 to 21, comprising a hinge located in the gap between the first support substrate and the second support substrate, movably connecting the first support substrate and the second support substrate, wherein in a planar view, the hinge overlaps with the first portion.

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