Display device

Abstract

The present invention provides a display device capable of suppressing the viewing of a bent portion of a plate-like component through a display panel. The display device (10) includes a display panel (20) and a plate-like component (41). The plate-like component (41) includes a bent portion (42) that bends when the plate-like component (41) is bent. The bent portion (42) includes a region group (42A) including a plurality of regions (42a to 42i) arranged in a bending direction (A) in which the bent portion (42) bends when the plate-like component (41) is bent. A plurality of through holes are formed in each of the plurality of regions (42a to 42i) to open. The aperture ratio of the bent portion (42) in each of the plurality of regions (42a to 42i) is different from the aperture ratio of the bent portion (42) in a region adjacent to the region in the plurality of regions (42a to 42i).

Description

Technical Field

[0001] The present invention relates to a display device, and more particularly to a display device including a flexible display panel. Background Art

[0002] Display devices having flexible display panels are known. Patent Document 1 discloses a flexible display comprising a flexible display panel and a lower plate facing the lower surface of the display panel. The lower plate is foldable, and a plurality of openings are provided in the folding region of the lower plate.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2019-28467

[0004] However, the flexible display of Patent Document 1 has a problem in that the folded area of ​​the lower plate is visible through the display panel. Summary of the Invention

[0005] The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to provide a display device capable of preventing the bent portion of a plate-shaped member from being visible through a display panel.

[0006] A display device according to one embodiment of the present invention comprises: a display panel capable of being bent or rolled; and a plate-like component stacked on the display panel and capable of being bent or rolled together with the display panel, the plate-like component having a bent portion that bends when the plate-like component is bent or rolled together with the display panel, the bent portion having a region group, the region group including a plurality of regions arranged in a bending direction in which the bent portion bends when the plate-like component is bent or rolled together with the display panel, a plurality of through holes being formed in each of the plurality of regions and opening, and an opening ratio of the bent portion in each of the plurality of regions being different from an opening ratio of the bent portion in a region adjacent to the region among the plurality of regions.

[0007] According to the present invention, it is possible to provide a display device capable of suppressing visibility of a bent portion of a plate-shaped member through a display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 (a) and (b) are perspective views showing the display device according to Embodiment 1.

[0009] Figure 2 Yes Figure 1 (a) is an exploded perspective view of a display device.

[0010] Figure 3 Yes Figure 1 (a) is a cross-sectional view of a display device.

[0011] Figure 4 (a) and (b) represent Figure 1 (a) is a diagram of a reinforcing member of a display device.

[0012] Figure 5 (a) and (b) are diagrams showing a reinforcing member of a display device according to a second embodiment.

[0013] Figure 6 (a) and (b) are perspective views showing a display device according to a third embodiment.

[0014] Figure 7 Yes Figure 6 (a) is a diagram of a reinforcing member of a display device.

[0015] Figure 8 Yes Figure 7 An enlarged view of the portion surrounded by a dotted line in FIG.

[0016] Description of Reference Numerals

[0017] 10.100 Display device

[0018] 20, 120 display panels

[0019] 21 Covering Window

[0020] 22 Optical Adhesive Sheet

[0021] 23 Circular polarizing plate

[0022] 24 Optical Adhesive Sheet

[0023] 25 OLED panels

[0024] 30, 130 optical adhesive sheet

[0025] 40, 50, 140 reinforcement parts

[0026] 41, 51, 141 plate-shaped parts

[0027] 42, 52, 142 bends

[0028] 42A, 52A, 142A, 142B area groups

[0029] Areas 42a, 42b, 42c, 42d, 42e, 42f, 42g, 42h, 42i, 52a, 52b, and 52c

[0030] 43 First flat part

[0031] 44 Second flat part

[0032] 45a, 45b, 45c, 45d, 45e, 45f, 45g, 45h, 45i, 55a, 55b, 55c through holes DETAILED DESCRIPTION

[0033] Hereinafter, embodiments of the display device of the present invention will be described with reference to the accompanying drawings. In addition, the embodiments described below each represent a specific example of the present invention. Therefore, the numerical values, components, configuration positions of the components, and connection methods shown in the following embodiments are all examples and do not limit the subject matter of the present invention. Therefore, among the components of the following embodiments, the components that are not described in the independent claims can be described as arbitrary components.

[0034] In each figure, the same reference numerals are attached to substantially the same components. In addition, each figure is a schematic diagram and does not necessarily strictly represent the size ratio of each part.

[0035] (Implementation Method 1)

[0036] Figure 1 (a) and (b) are perspective views showing the display device 10 according to the first embodiment. Figure 1 (a) shows a state where the display panel 20 of the display device 10 is unfolded. Figure 1 (b) shows a state where the display panel 20 and other parts of the display device 10 are bent. Figure 2 Yes Figure 1 Exploded perspective view of the display device 10. Figure 3 Yes Figure 1 (a) is a cross-sectional view of the display device 10. Specifically, Figure 3 yes Figure 1 (a) is a cross-sectional view of line III-III. Figure 2 as well as Figure 3 In FIG, the boundary between the curved portion 42 and the first flat portion 43 and the boundary between the curved portion 42 and the second flat portion 44 are indicated by two-dot chain lines. Figure 2 as well as Figure 3 , the illustration of the plurality of through holes formed in the bent portion 42 is omitted. Figure 1 (a) and (b) to Figure 3 The display device 10 according to Embodiment 1 will be described.

[0037] like Figure 1 (a) and (b) and Figure 2As shown, the display device 10 is a device for displaying images and includes a display panel 20, an optical adhesive sheet 30, and a reinforcing member 40. The display device 10 is a foldable display device that can fold the display panel 20, the optical adhesive sheet 30, and the reinforcing member 40 and then unfold the folded display panel 20. For example, the display device 10 is used in a tablet terminal, a digital television, a digital signage, a smartphone, or a wearable terminal.

[0038] The display panel 20 is a bendable display panel. It is flexible and is a so-called flexible display panel. The display panel 20 displays images. For example, the display panel 20 is connected to a drive substrate (not shown) via a flexible substrate (not shown) and is driven by the drive substrate to display images.

[0039] The display panel 20 is a plate-shaped component that extends in a first direction and a second direction perpendicular to the first direction in the unfolded state, and has a third direction perpendicular to the first direction and the second direction as its thickness direction, and displays images toward one side of the third direction (the positive side in the Z-axis direction). The display panel 20 is rectangular when viewed from the third direction in the unfolded state. The first direction is Figure 1 The X-axis in (a) and (b) indicates the direction, and the second direction is Figure 1 The Y axis in (a) and (b) indicates the direction, and the third direction is Figure 1 The Z axis in (a) and (b) is the direction indicated by the Z axis. In addition, for example, the display panel 20 in the unfolded state may not be rectangular, but may be other polygonal, circular, or elliptical shapes.

[0040] The display panel 20 is bent in the first direction. That is, the display panel 20 is bent in the first direction while being bent. In this embodiment, the display panel 20 is bent so that the optical adhesive sheet 30 and the reinforcing member 40 are positioned outside the display panel 20 .

[0041] like Figure 3 As shown, the display panel 20 includes a cover window 21 , an optical adhesive sheet 22 , a circular polarizer 23 , an optical adhesive sheet 24 , and an OLED (Organic Light Emitting Diode) panel 25 .

[0042] The cover window 21, optical adhesive sheet 22, circular polarizer 23, optical adhesive sheet 24, and OLED panel 25 are sequentially stacked in the thickness direction of the display panel 20. The thickness direction of the display panel 20 is consistent with the thickness direction of the optical adhesive sheet 30 and the thickness direction of the reinforcing member 40.

[0043] Cover window 21 is bonded to circular polarizer 23 via optical adhesive sheet 22, and circular polarizer 23 is bonded to OLED panel 25 via optical adhesive sheet 24. OLED panel 25 is constructed by stacking, for example, TFTs (thin film transistors), OLEDs (organic electroluminescent elements), and TFE (thin film encapsulation).

[0044] like Figure 1 (a) and (b) to Figure 3 As shown, the optical adhesive sheet 30 is attached to the back surface of the display panel 20, opposite to the display surface where an image is displayed, and is laminated to the display panel 20. In this embodiment, the optical adhesive sheet 30 is attached to the entire back surface of the display panel 20. In this embodiment, the back surface of the display panel 20 is the back surface of the OLED panel 25. For example, an acrylic, silicone, epoxy, or rubber-based adhesive material can be used as the optical adhesive sheet 30.

[0045] The reinforcing member 40 is a member for reinforcing the display panel 20. The reinforcing member 40 includes a plate-shaped member 41.

[0046] The plate-shaped member 41 is laminated on the display panel 20 and is bendable together with the display panel 20. The plate-shaped member 41 is laminated on the back side of the display panel 20. The rigidity of the plate-shaped member 41 is higher than that of the display panel 20. The plate-shaped member 41 is bonded to the display panel 20 via the optical adhesive sheet 30.

[0047] The plate-shaped member 41 is a plate-shaped member that, when deployed, extends in the first and second directions and has a thickness direction defined by the third direction. When deployed, the plate-shaped member 41 is rectangular when viewed from the third direction. Furthermore, for example, the plate-shaped member 41 may not be rectangular when deployed, but may have other shapes such as polygonal, circular, or elliptical. For example, the plate-shaped member 41 may be formed from a metal with a large elastic range, such as SUS301.

[0048] The plate-shaped member 41 has a bent portion 42 , a first flat portion 43 , and a second flat portion 44 .

[0049] The bent portion 42 is a bent portion that bends when the plate-like member 41 is bent together with the display panel 20. The bent portion 42 is in a plate shape with the third direction being the thickness direction when the plate-like member 41 is in an expanded state.

[0050] When the plate member 41 is folded together with the display panel 20, the bending portion 42 bends in a bending direction A that is parallel to the main surface of the plate member 41. This direction coincides with the second direction when the plate member 41 is unfolded, and the plate member 41 bends about the first direction when folded together with the display panel 20. A perpendicular direction B, which is perpendicular to the bending direction A, is parallel to the main surface of the plate member 41, perpendicular to the thickness direction of the plate member 41, and coincides with the first direction.

[0051] In this embodiment, the curved portion 42 is located in the center of the plate-like member 41 in the bending direction A and extends from one end of the plate-like member 41 to the other end in the orthogonal direction B. As will be described in detail later, the curved portion 42 is formed with a plurality of through-holes. By forming these through-holes, the curved portion 42 can be bent to a degree that allows the plate-like member 41 to be bent. Specifically, the plurality of through-holes formed in the curved portion 42 are through-holes for enabling the plate-like member 41 to be bent at the curved portion 42.

[0052] The first flat portion 43 is connected to one end of the curved portion 42 in the bending direction A and is integrally formed with the curved portion 42. The first flat portion 43 is plate-shaped, with the third direction being the thickness direction when the plate-shaped member 41 is unfolded. The first flat portion 43 does not have a plurality of through-holes, and its rigidity is higher than that of the display panel 20. The first flat portion 43 is laminated to a portion of the display panel 20 closer to the center in the bending direction A and is bonded to this portion via the optical adhesive sheet 30. This prevents degradation of the flatness of this portion of the display panel 20.

[0053] The second flat portion 44 is connected to the other end of the curved portion 42 in the bending direction A and is integrally formed with the curved portion 42. The second flat portion 44 is plate-shaped, with the third direction being the thickness direction when the plate-shaped member 41 is unfolded. The second flat portion 44 does not have a plurality of through-holes, and its rigidity is higher than that of the display panel 20. The second flat portion 44 is laminated to a portion of the display panel 20 located further away from the center in the bending direction A and is bonded to this portion via the optical adhesive sheet 30. This prevents degradation of the flatness of this portion of the display panel 20.

[0054] Figure 4 (a) means Figure 1 (a) shows a diagram of the reinforcing member 40 of the display device 10. Figure 4 (b) means Figure 4 An enlarged view of the portion surrounded by the dotted line in (a). Figure 4 In (a), the boundary between the curved portion 42 and the first flat portion 43 and the boundary between the curved portion 42 and the second flat portion 44 are indicated by two-dot chain lines. Figure 4In (a), the illustration of the plurality of through holes formed in the bent portion 42 is omitted. Figure 4 (a) and (b) describe the reinforcing member 40 in detail.

[0055] like Figure 4 As shown in FIG. 5( b ), the curved portion 42 includes a region group 42A including a plurality of regions 42 a to 42 i arranged in the curved direction A. The plurality of regions 42 a to 42 i extend from one end portion to the other end portion of the curved portion 42 in the orthogonal direction B, respectively.

[0056] The plurality of regions 42a to 42i include a central region located at the center of the curved portion 42 in the curved direction A, a first end region located at one end of the curved portion 42 in the curved direction A, and a second end region located at the other end of the curved portion 42 in the curved direction A. In this embodiment, the region 42a is the central region, the region 42e is the first end region, and the region 42i is the second end region.

[0057] In this embodiment, the plurality of regions 42a to 42i include one or more regions located between the central region and one end region, and one or more regions located between the central region and the other end region. In this embodiment, the one or more regions located between the central region and one end region are three regions 42b, 42c, and 42d, and the one or more regions located between the central region and the other end region are three regions 42f, 42g, and 42h.

[0058] The three regions 42b, 42c, and 42d are arranged in this order from the region 42a toward the region 42e. The three regions 42f, 42g, and 42h are arranged in this order from the region 42a toward the region 42i.

[0059] The reinforcing member 40 has a plurality of through-holes formed in each of the plurality of regions 42a to 42i. Specifically, the reinforcing member 40 has a plurality of through-holes 45a formed in region 42a, a plurality of through-holes 45b formed in region 42b, a plurality of through-holes 45c formed in region 42c, a plurality of through-holes 45d formed in region 42d, a plurality of through-holes 45e formed in region 42e, a plurality of through-holes 45f formed in region 42f, a plurality of through-holes 45g formed in region 42g, a plurality of through-holes 45h formed in region 42h, and a plurality of through-holes 45i formed in region 42i. For example, the plurality of through-holes formed in each of the plurality of regions 42a to 42i are formed by wet etching or the like.

[0060] Each of the plurality of through holes formed in each of the plurality of regions 42a to 42i penetrates the bent portion 42 in the thickness direction of the bent portion 42. That is, each of the plurality of through holes 45a, each of the plurality of through holes 45b, each of the plurality of through holes 45c, each of the plurality of through holes 45d, each of the plurality of through holes 45e, each of the plurality of through holes 45f, each of the plurality of through holes 45g, each of the plurality of through holes 45h, and each of the plurality of through holes 45i penetrates the bent portion 42 in the thickness direction of the bent portion 42.

[0061] The curved portion 42 is opened by forming a plurality of through-holes in each of the plurality of regions 42a to 42i. Specifically, each of the plurality of through-holes formed in each of the plurality of regions 42a to 42i penetrates the curved portion 42, thereby opening the curved portion 42. For example, when the plate-like member 41 is unfolded and viewed from the thickness direction, the curved portion 42 is opened in the portion where the plurality of through-holes 45a, 45b, 45c, 45d, 45e, 45f, 45g, 45h, and 45i are formed.

[0062] The aperture ratio of the curved portion 42 of each of the plurality of regions 42a to 42i differs from the aperture ratio of the curved portion 42 of the adjacent regions among the plurality of regions 42a to 42i. Specifically, for example, the aperture ratio of the curved portion 42 of region 42a differs from the aperture ratio of the curved portion 42 of region 42b adjacent to region 42a, and differs from the aperture ratio of the curved portion 42 of region 42f adjacent to region 42a. Furthermore, for example, the aperture ratio of the curved portion 42 of region 42c differs from the aperture ratio of the curved portion 42 of region 42b adjacent to region 42c, and differs from the aperture ratio of the curved portion 42 of region 42d adjacent to region 42c. Furthermore, for example, the aperture ratio of the curved portion 42 of region 42e differs from the aperture ratio of the curved portion 42 of region 42d adjacent to region 42e.

[0063] The opening ratio of the curved portion 42 in one end region and the opening ratio of the curved portion 42 in the other end region are smaller than the opening ratio of the curved portion 42 in the central region. That is, the opening ratio of the curved portion 42 in region 42e and the opening ratio of the curved portion 42 in region 42i are smaller than the opening ratio of the curved portion 42 in region 42a.

[0064] For example, the aperture ratio of the curved portion 42 of each of the plurality of regions 42a to 42i is the ratio of the area of ​​the through-holes formed per unit area of ​​the region to the area of ​​the unit area when the plate member 41 is viewed from the thickness direction in the unfolded state. Specifically, for example, the aperture ratio of the curved portion 42 of region 42a is the ratio of the area of ​​the through-holes 45a formed per unit area of ​​region 42a to the area of ​​the unit area when the plate member 41 is viewed from the thickness direction in the unfolded state. More specifically, for example, the aperture ratio of the curved portion 42 of region 42a is calculated by dividing (the area of ​​the through-holes 45a formed per unit area of ​​region 42a) by (the area of ​​the unit area) when the plate member 41 is viewed from the thickness direction in the unfolded state.

[0065] The aperture ratio of the curved portion 42 of the plurality of regions 42a to 42i decreases from the central region toward one end region, and then decreases from the central region toward the other end region. Specifically, the aperture ratio of the curved portion 42 decreases in the order of region 42a, region 42b, region 42c, region 42d, and region 42e, and decreases in the order of region 42a, region 42f, region 42g, region 42h, and region 42i.

[0066] The size of each of the plurality of through-holes formed in one end region and the size of each of the plurality of through-holes formed in the other end region in the orthogonal direction B is smaller than the size of each of the plurality of through-holes formed in the central region. That is, the size of each of the plurality of through-holes 45e formed in region 42e and the size of each of the plurality of through-holes 45i formed in region 42i in the orthogonal direction B is smaller than the size of each of the plurality of through-holes 45a formed in region 42a.

[0067] The size of each of the through-holes formed in the plurality of regions 42a to 42i in the orthogonal direction B decreases from the central region toward one end region, and then decreases from the central region toward the other end region. That is, the size of each of the through-holes in the orthogonal direction B decreases in the order of region 42a, region 42b, region 42c, region 42d, and region 42e, and the size of each of the through-holes in the orthogonal direction B decreases in the order of region 42a, region 42f, region 42g, region 42h, and region 42i.

[0068] The plurality of through holes formed in each of the plurality of regions 42 a to 42 i are arranged in the bending direction A and the orthogonal direction B. In the present embodiment, the plurality of through holes formed in each of the plurality of regions 42 a to 42 i are arranged in a staggered pattern.

[0069] The spacing of the plurality of through-holes in one of two adjacent regions among the plurality of regions 42a to 42i in the direction B perpendicular to the arrangement of the through-holes is different from the spacing of the plurality of through-holes in the other region in the direction B perpendicular to the arrangement of the through-holes. For example, the spacing of the plurality of through-holes in the direction B perpendicular to the arrangement of the through-holes is the distance between the center of one of the two adjacent through-holes in the direction B perpendicular to the arrangement of the through-holes and the center of the other through-hole in the direction B perpendicular to the arrangement of the through-holes.

[0070] For example, the intervals in the orthogonal direction B of the through holes 45a formed in one of the two adjacent regions 42a and 42b are different from the intervals in the orthogonal direction B of the through holes 45b formed in the other region 42b.

[0071] The spacing in the orthogonal direction B of the through-holes formed in the plurality of regions 42a to 42i decreases from the central region toward one end region, and decreases from the central region toward the other end region. Specifically, the spacing in the orthogonal direction B of the through-holes formed in the order of region 42a, region 42b, region 42c, region 42d, and region 42e decreases, and the spacing in the orthogonal direction B of the through-holes formed in the order of region 42a, region 42f, region 42g, region 42h, and region 42i decreases.

[0072] The spacing in the curvature direction A of the arrangement of the plurality of through-holes formed in one of two adjacent regions of the plurality of regions 42a to 42i is equal to the spacing in the curvature direction A of the arrangement of the plurality of through-holes formed in the other region. For example, the spacing in the curvature direction A of the arrangement of the plurality of through-holes is the distance between the center of one of the two adjacent through-holes in the curvature direction A and the center of the other through-hole in the curvature direction A. In this embodiment, the spacing in the curvature direction A of the arrangement of the plurality of through-holes formed in the plurality of regions 42a to 42i is equal.

[0073] The display device 10 according to the first embodiment has been described above.

[0074] The display device 10 of embodiment 1 includes: a bendable display panel 20; and a plate-like component 41, which is stacked on the display panel 20 and can be bent together with the display panel 20, the plate-like component 41 has a bending portion 42 that bends when the plate-like component 41 is bent together with the display panel 20, the bending portion 42 has an area group 42A, and the area group 42A includes a plurality of areas 42a~42i arranged in a bending direction A in which the bending portion 42 bends when the plate-like component 41 is bent together with the display panel 20, a plurality of through holes are formed in each of the plurality of areas 42a~42i, and the opening ratio of the bending portion 42 of each of the plurality of areas 42a~42i is different from the opening ratio of the bending portion 42 of an area adjacent to the area in the plurality of areas 42a~42i.

[0075] As a result, the aperture ratio of the curved portion 42 in each of the plurality of regions 42a to 42i differs from the aperture ratio of the curved portion 42 in the region adjacent to that region. Therefore, since the portion of each of the plurality of regions 42a to 42i where the plurality of through-holes are not formed can be prevented from being aligned with the portion of the adjacent region where the plurality of through-holes are not formed in the bending direction A, the curved portion 42 of the plate-like member 41 can be prevented from being visible through the display panel 20.

[0076] In addition, in the display device 10 of embodiment 1, the multiple regions 42a to 42i include a central region (region 42a) at the central part of the curved portion 42 located in the curved direction A, an end region (region 42e) at one end of the curved portion 42 located in the curved direction A, and another end region (region 42i) at the other end of the curved portion 42 located in the curved direction A, and the aperture ratio of the curved portion 42 in the one end region and the aperture ratio of the curved portion 42 in the other end region are smaller than the aperture ratio of the curved portion 42 in the central region.

[0077] As a result, since the aperture ratios of the curved portion 42 in the one end region and the curved portion 42 in the other end region are smaller than the aperture ratio of the curved portion 42 in the central region, it is possible to prevent the plate-like member 41 from becoming difficult to bend, and to prevent the one end region and the other end region from being visible through the display panel 20. Therefore, it is possible to prevent the curved portion 42 of the plate-like member 41 from being visible through the display panel 20.

[0078] In addition, in the display device 10 of embodiment 1, the size of each of the multiple through holes 45e formed in one end area in the orthogonal direction B orthogonal to the bending direction A and the size of each of the multiple through holes 45i formed in the other end area are smaller than the size of each of the multiple through holes 45a formed in the central area.

[0079] Accordingly, since the aperture ratio of the curved portion 42 in one end region and the aperture ratio of the curved portion 42 in the other end region can be easily made smaller than the aperture ratio of the curved portion 42 in the central region, it is easy to prevent the curved portion 42 of the plate-shaped member 41 from being visible through the display panel 20.

[0080] In addition, in the display device 10 of embodiment 1, the multiple regions 42a~42i include one or more regions 42b, 42c, 42d located between the central region and one end region; and one or more regions 42f, 42g, 42h located between the central region and the other end region, and the opening ratio of the curved portion 42 of the multiple regions 42a~42i decreases from the central region toward one end region, and decreases from the central region toward the other end region.

[0081] This can further prevent the plate-shaped member 41 from being difficult to bend, and can prevent the bent portion 42 of the plate-shaped member 41 from being visible through the display panel 20 .

[0082] In addition, in the display device 10 of embodiment 1, the multiple through holes formed in each of the multiple regions 42a to 42i are arranged at least in an orthogonal direction B that is orthogonal to the bending direction A, and the spacing in the orthogonal direction B of the multiple through holes formed in one of two adjacent regions among the multiple regions 42a to 42i is different from the spacing in the orthogonal direction B of the multiple through holes formed in the other region.

[0083] Thus, in two adjacent regions among the plurality of regions 42a to 42i, the positions of the non-opening portions between two adjacent through-holes in the orthogonal direction B can be made different from each other in the orthogonal direction B, thereby preventing the non-opening portions from being aligned in the bending direction A. Therefore, it is possible to prevent the curved portion 42 from becoming easily visible due to the non-opening portions being aligned in the bending direction A, and to prevent the curved portion 42 of the plate-like member 41 from being visible through the display panel 20.

[0084] In the display device 10 according to the first embodiment, the plurality of through holes formed in each of the plurality of regions 42 a to 42 i are arranged in a staggered pattern.

[0085] Thus, in two adjacent regions among the plurality of regions 42a to 42i, the positions of the non-opening portions between two adjacent through-holes in the orthogonal direction B can be made different from each other in the orthogonal direction B, thereby preventing the non-opening portions from being aligned in the bending direction A. Therefore, it is possible to prevent the curved portion 42 from becoming easily visible due to the non-opening portions being aligned in the bending direction A, and to prevent the curved portion 42 of the plate-like member 41 from being visible through the display panel 20.

[0086] (Implementation Method 2)

[0087] Figure 5 (a) is a diagram showing a reinforcing member 50 of a display device according to a second embodiment. Figure 5 (b) means Figure 5 An enlarged view of the portion surrounded by the dotted line in (a). Figure 5 In (a), the boundary between the curved portion 52 and the first flat portion 43 and the boundary between the curved portion 52 and the second flat portion 44 are indicated by two-dot chain lines. Figure 5 In (a), the illustration of the plurality of through holes formed in the bent portion 52 is omitted. Figure 5 (a) and (b) describe in detail the reinforcing member 50 included in the display device of the second embodiment.

[0088] like Figure 5 As shown in FIG. 5 ( a ), the reinforcing member 50 includes a plate-shaped member 51 . The plate-shaped member 51 differs from the plate-shaped member 41 mainly in that it includes a bent portion 52 that is different from the bent portion 42 .

[0089] The curved portion 52 includes a region group 52A including a plurality of regions 52a to 52c arranged in the curved direction A. Each of the plurality of regions 52a to 52c extends from one end portion of the curved portion 52 in the orthogonal direction B to the other end portion.

[0090] The plurality of regions 52a to 52c include a central region located at the center of the curved portion 52 in the curved direction A, a first end region located at one end of the curved portion 52 in the curved direction A, and a second end region located at the other end of the curved portion 52 in the curved direction A. In this embodiment, the region 52a is the central region, the region 52b is the first end region, and the region 52c is the second end region.

[0091] The reinforcing member 50 has a plurality of through-holes formed in each of the plurality of regions 52a to 52c. Specifically, the reinforcing member 50 has a plurality of through-holes 55a formed in the region 52a, a plurality of through-holes 55b formed in the region 52b, and a plurality of through-holes 55c formed in the region 52c. For example, the plurality of through-holes formed in each of the plurality of regions 52a to 52c are formed by wet etching or the like.

[0092] The aperture ratio of the curved portion 52 of each of the plurality of regions 52a to 52c is different from the aperture ratio of the curved portion 52 of the region adjacent to the region 52a to 52c. Specifically, for example, the aperture ratio of the curved portion 52 of the region 52a is different from the aperture ratio of the curved portion 52 of the region 52b adjacent to the region 52a, and is different from the aperture ratio of the curved portion 52 of the region 52c adjacent to the region 52a.

[0093] The dimension of each of the plurality of through-holes 55a in the orthogonal direction B is such that, with the dimension of the through-hole 55a located at the center of the curved portion 52 in the orthogonal direction B being the predetermined dimension, the through-hole 55a gradually becomes shorter as it is located closer to the end of the curved portion 52 in the orthogonal direction B. The dimension of each of the plurality of through-holes 55b and each of the plurality of through-holes 55c in the orthogonal direction B is less than half of the predetermined dimension. In other words, the regions 52b and 52c are regions in which through-holes having a dimension in the orthogonal direction B that is less than half of the predetermined dimension are formed.

[0094] In each of the plurality of regions 52a to 52c, the dimensions of the plurality of through-holes in the orthogonal direction B increase as they are closer to the center of the curved portion 52 in the bending direction A. For example, in region 52a, the dimensions of the plurality of through-holes 55a in the orthogonal direction B increase as they are closer to the center of the curved portion 52 in the bending direction A. In other words, among the plurality of through-holes 55a formed in region 52a, the through-holes 55a formed in the center of the curved portion 52 in the bending direction A have a larger dimension in the orthogonal direction B.

[0095] The display device according to the second embodiment has been described above.

[0096] (Implementation 3)

[0097] Figure 6 (a) and (b) are perspective views showing a display device 100 according to a third embodiment. Figure 6 (a) shows a state where the display panel 120 and the like of the display device 100 are unfolded. Figure 6 (b) shows a state in which the display panel 120 and the like of the display device 100 are rolled up. Figure 7 Yes Figure 6 FIG. 1 is a diagram of the reinforcing member 140 of the display device 100. Figure 7 , the illustration of the plurality of through holes formed in the bent portion 142 is omitted. Figure 6 (a) and (b) and Figure 7 A display device 100 according to Embodiment 3 will be described.

[0098] like Figure 6 As shown in (a) and (b) of FIG, the display device 100 is a device for displaying images and includes a display panel 120, an optical adhesive sheet 130, and a reinforcing member 140. The display device 100 is a rollable display device that can be rolled up, including the display panel 120, the optical adhesive sheet 130, and the reinforcing member 140, and can be unfolded. For example, the display device 100 is used in tablet terminals, digital televisions, digital signage, smartphones, or wearable devices.

[0099] The display panel 120 is a rollable display panel. It is flexible and is a so-called flexible display panel. The display panel 120 displays images. For example, the display panel 120 is connected to a drive substrate (not shown) via a flexible substrate (not shown) and is driven by the drive substrate to display images.

[0100] The display panel 120 is a plate-shaped component that extends in the first and second directions and has a thickness direction in the third direction when in the unfolded state. It displays images facing one side in the third direction (the positive side in the Z-axis direction). The display panel 120 is rectangular when viewed from the third direction when in the unfolded state. Alternatively, for example, the display panel 120 may not be rectangular when in the unfolded state, but may have other shapes such as polygons, circles, or ellipses.

[0101] The display panel 120 is rolled in the first direction. That is, the display panel 120 is bent in the first direction while rolled. In this embodiment, the display panel 120 is rolled such that the optical adhesive sheet 130 and the reinforcing member 140 are positioned outside the display panel 120 .

[0102] The display panel 120 , for example, similar to the display panel 20 , includes a cover window, an optical adhesive sheet, a circularly polarizing plate, an optical adhesive sheet, and an OLED (Organic Light Emitting Diode) panel, which are stacked.

[0103] The optical adhesive sheet 130 is attached to the back surface of the display panel 120, which is opposite to the display surface on which an image is displayed, and is laminated to the display panel 120. In this embodiment, the optical adhesive sheet 130 is attached to the entire back surface of the display panel 120. For example, an acrylic, silicone, epoxy, or rubber-based adhesive material can be used as the optical adhesive sheet 130.

[0104] The reinforcing member 140 is a member for reinforcing the display panel 120. The reinforcing member 140 includes a plate-shaped member 141.

[0105] The plate-shaped member 141 is a plate-shaped member that is laminated on the display panel 120 and can be rolled together with the display panel 120. The plate-shaped member 141 is laminated on the back side of the display panel 120. The rigidity of the plate-shaped member 141 is higher than that of the display panel 120. The plate-shaped member 141 is bonded to the display panel 120 via the optical adhesive sheet 130.

[0106] The plate-shaped member 141 is a plate-shaped member that, when deployed, extends in the first and second directions and has a thickness along the third direction. When deployed, the plate-shaped member 141 is rectangular when viewed from the third direction. Furthermore, the plate-shaped member 141 may not be rectangular when deployed, but may have other shapes such as polygons, circles, or ellipses. For example, the plate-shaped member 141 may be formed from a metal with a high elastic range, such as SUS301.

[0107] The plate-like member 141 has a bent portion 142. The bent portion 142 is bent when the plate-like member 141 is rolled up together with the display panel 120. The bent portion 142 is in a plate shape with the third direction being the thickness direction when the plate-like member 141 is unfolded.

[0108] When the plate member 141 is rolled up together with the display panel 120, the bending portion 142 bends in a bending direction A1 that is parallel to the main surface of the plate member 141. This direction coincides with the second direction when the plate member 141 is unfolded, and the plate member 141 bends in the first direction when rolled up together with the display panel 120. A perpendicular direction B1, which is perpendicular to the bending direction A1, is parallel to the main surface of the plate member 141, perpendicular to the thickness direction of the plate member 141, and coincides with the first direction.

[0109] In this embodiment, when the plate-shaped member 141 is rolled up together with the display panel 120, the entire plate-shaped member 141 bends. That is, in this embodiment, the entire plate-shaped member 141 constitutes the bent portion 142. Alternatively, the entire plate-shaped member 141 may not be the bent portion 142. For example, one end and the other end of the plate-shaped member 141 in the bending direction A1 may not be bent. In this case, the portion of the plate-shaped member 141 between the one end and the other end constitutes the bent portion 142.

[0110] As will be described in detail later, a plurality of through-holes are formed in the curved portion 142. The formation of the plurality of through-holes allows the curved portion 142 to be bent to such an extent that the plate-shaped member 141 can be rolled up. In other words, each of the plurality of through-holes formed in the curved portion 142 is a through-hole for rolling up the plate-shaped member 141.

[0111] Figure 8 Yes Figure 7 This is an enlarged view of the portion surrounded by the dotted line. Figure 8 The reinforcement member 140 will be described in detail.

[0112] like Figure 8As shown, the curved portion 142 includes multiple region groups 142A and 142B. These regions 142A and 142B are aligned and adjacent to each other in the curved direction A1. In this embodiment, the curved portion 142 includes region group 142A on one side of the center of the curved portion 142 in the curved direction A1, and region group 142B on the other side. Each of the multiple region groups 142A and 142B includes multiple regions 42a to 42i aligned in the curved direction A1. In each of the multiple region groups 142A and 142B, each of the multiple regions 42a to 42i extends from one end of the curved portion 142 in the orthogonal direction B1 to the other end.

[0113] In each of the plurality of region groups 142A and 142B, the plurality of regions 42a to 42i includes a central region located in the center of the region group in the bending direction A1, a first end region located at one end of the region group in the bending direction A1, and a second end region located at the other end of the region group in the bending direction A1. In this embodiment, in each of the plurality of region groups 142A and 142B, region 42a is the central region, region 42e is the first end region, and region 42i is the second end region.

[0114] In each of the plurality of region groups 142A and 142B, the aperture ratio of the bent portion 42 of each of the plurality of regions 42a to 42i is different from the aperture ratio of the bent portion 42 of the region adjacent to the region in the plurality of regions 42a to 42i.

[0115] Furthermore, in each of the plurality of region groups 142A and 142B, the aperture ratio of the curved portion 142 in one end region and the aperture ratio of the curved portion 142 in the other end region are smaller than the aperture ratio of the curved portion 142 in the central region. That is, in each of the plurality of region groups 142A and 142B, the aperture ratio of the curved portion 142 in region 42e and the aperture ratio of the curved portion 142 in region 42i are smaller than the aperture ratio of the curved portion 142 in region 42a.

[0116] The display device 100 according to the third embodiment has been described above.

[0117] In the display device 100 of embodiment 3, the curved portion 142 has a plurality of region groups 142A and 142B arranged in the curved direction A1. In each of the plurality of region groups 142A and 142B, the plurality of regions 42a to 42i include a central region (region 42a) located in the central portion of the region group in the curved direction A1, an end region (region 42e) located at one end of the region group in the curved direction A1, and an other end region (region 42i) located at the other end of the region group in the curved direction A1. In each of the plurality of region groups 142A and 142B, the aperture ratio of the curved portion 142 in the one end region and the aperture ratio of the curved portion 142 in the other end region are smaller than the aperture ratio of the curved portion 142 in the central region.

[0118] Thus, in each of the plurality of region groups 142A and 142B, the aperture ratio of the curved portion 142 in the one end region and the aperture ratio of the curved portion 142 in the other end region are smaller than the aperture ratio of the curved portion 142 in the central region. This prevents the plate-like member 141 from being easily bent, and also prevents the one end region and the other end region from being visible through the display panel 120. Therefore, it is possible to prevent the curved portion 142 of the plate-like member 141 from being visible through the display panel 120.

[0119] Furthermore, for example, the curved portion 142 may include a plurality of region groups each including a plurality of regions 52 a to 52 c and arranged in the curved direction A1 .

[0120] Furthermore, for example, the curved portion 142 may include a central region located in the center of the curved portion 142 in the curved direction A1, a first end region located at one end of the curved portion 142 in the curved direction A1, and a second end region located at the other end of the curved portion 142 in the curved direction A1. In this case, the aperture ratio of the curved portion 142 in the first end region and the aperture ratio of the curved portion 142 in the second end region may be smaller than the aperture ratio of the curved portion 142 in the central region.

[0121] Furthermore, for example, the display device 100 may further include a winding device for winding the display panel 120, etc., and a pulling device for pulling out the wound display panel 120, etc. For example, the winding device may include a shaft connected to one end of the display panel 120, etc. for winding the display panel 120, etc., and a motor for rotating the shaft. Furthermore, for example, the pulling device may include a fixing member fixed to the other end of the display panel 120, etc., and a pantagraph for pushing the fixing member in the pulling direction.

[0122] (Other embodiments, etc.)

[0123] The display device of the present invention has been described above based on the embodiments, but the present invention is not limited to the above-mentioned embodiments. Modifications obtained by implementing various modifications that can be conceived by those skilled in the art to the above-mentioned embodiments within the scope of the present invention, and various devices incorporating the display panel of the present invention are also included in the present invention.

[0124] In the above embodiment, the size of each of the multiple through-holes formed in one end region and the size of each of the multiple through-holes formed in the other end region in the orthogonal direction B is described as being smaller than the size of each of the multiple through-holes formed in the central region, but the present invention is not limited to this. For example, the size of each of the multiple through-holes formed in one end region and the size of each of the multiple through-holes formed in the other end region in the orthogonal direction B may be equal to the size of each of the multiple through-holes formed in the central region. In this case, for example, by making the spacing between the multiple through-holes formed in one end region and the spacing between the multiple through-holes formed in the other end region larger than the spacing between the multiple through-holes formed in the central region, the aperture ratio of the curved portion in the one end region and the aperture ratio of the curved portion in the other end region can be made smaller than the aperture ratio of the curved portion in the central region. That is, for example, the opening ratio of the curved portion of one region can be made different from the opening ratio of the curved portion of the other region by making the size in the orthogonal direction of each of the multiple through holes formed in one region of two adjacent regions among the multiple regions equal to the size in the orthogonal direction of each of the multiple through holes formed in the other region and making the spacing in the orthogonal direction of the arrangement of the multiple through holes formed in one region different from the spacing in the orthogonal direction of the arrangement of the multiple through holes formed in the other region.

[0125] Industrial Applicability

[0126] The display device of the present invention can be used in digital televisions, digital signage, smart phones, tablet terminals, wearable terminals, etc.

Claims

1. A display device, characterized in that: The display device comprises: A display panel capable of being bent or rolled; and a plate-shaped component, which is stacked on the display panel and can be bent or rolled together with the display panel, The plate-shaped member has a bent portion that bends when the plate-shaped member is folded together with the display panel or when it is rolled up. The bent portion includes a region group, the region group including a plurality of regions arranged in a bending direction in which the bent portion bends when the plate-shaped member is bent together with the display panel or rolled up, and a plurality of through holes are formed in each of the plurality of regions. The opening ratio of the bent portion of each of the plurality of regions is different from the opening ratio of the bent portion of a region adjacent to the region among the plurality of regions. The curved portion includes a plurality of the region groups arranged in the curved direction. In each of the plurality of region groups, the plurality of regions include: a central region located in a central portion of the region group in the bending direction; an end region located at one end of the region group in the bending direction; and another end region located at the other end of the region group in the bending direction. In each of the plurality of region groups, an opening ratio of the bent portion in the one end region and an opening ratio of the bent portion in the other end region are smaller than an opening ratio of the bent portion in the central region.

2. The display device according to claim 1, wherein The size of each of the multiple through holes formed in the one end region and the size of each of the multiple through holes formed in the other end region in an orthogonal direction orthogonal to the bending direction are smaller than the size of each of the multiple through holes formed in the central region.

3. The display device according to claim 1, wherein The plurality of regions include one or more regions located between the central region and the one end region, and one or more regions located between the central region and the other end region. The opening ratio of the curved portion of the plurality of regions decreases from the central region toward the one end region, and decreases from the central region toward the other end region.

4. The display device according to claim 1, wherein The plurality of through holes formed in each of the plurality of regions are arranged at least in a direction orthogonal to the bending direction. The intervals in the orthogonal direction of the arrangement of the plurality of through holes formed in one of two adjacent regions among the plurality of regions are different from the intervals in the orthogonal direction of the arrangement of the plurality of through holes formed in the other region.

5. The display device according to any one of claims 1 to 4, characterized in that The plurality of through holes formed in each of the plurality of regions are arranged in a staggered pattern.

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