Display device

Abstract

The present application relates to a display device including a substrate, a driving structure layer, a display structure layer, and a touch layer. The substrate includes a bending area and a main area adjacent to the bending area. The driving structure layer is disposed on the substrate. The driving structure layer includes an insulating structure, and the insulating structure includes a plurality of recesses. The display structure layer is disposed on the driving structure layer. The touch layer is disposed on the driving structure layer. A portion of the touch layer is disposed on the bending area of the substrate. At least a portion of the plurality of recesses is disposed on the bending area of the substrate.

Description

[0001] Cross-references to related applications

[0002] This application is a divisional application of U.S. Patent Application No. 201711454199.5, filed December 28, 2017, entitled "Display Device," claiming priority interests to U.S. Provisional Application No. 62 / 441,579, filed January 3, 2017, and U.S. Patent Application No. 15 / 480,383, filed April 6, 2017. The entire contents of the aforementioned patent applications are hereby incorporated herein by reference and form part of this specification. Technical Field

[0003] This invention relates to a display device. Background Technology

[0004] Today, electronic devices such as mobile phones, personal computers, digital cameras, and other consumer electronics are widely used. In the conventional manufacturing process of electronic devices' displays, after forming a display structure layer on a main substrate, the substrate is cut to form multiple display devices. However, micro-cracks can form at the edges of the display device's substrate. Once these micro-cracks propagate to the area containing the display structure layer, the display structure layer will be damaged. Furthermore, if the display device is flexible, the propagation of micro-cracks will be more severe, significantly reducing the durability of the display device. Summary of the Invention

[0005] The present invention provides a display device having a plurality of recesses. According to some embodiments, the propagation of micro-cracks in the display device can be prevented.

[0006] A display device according to an embodiment of the present invention includes a substrate, a driving structure layer, a display structure layer, and a touch layer. The substrate includes a curved region and a main region adjacent to the curved region. The driving structure layer is disposed on the substrate. The driving structure layer includes an insulating structure, and the insulating structure includes a plurality of recesses. The display structure layer is disposed on the driving structure layer. The touch layer is disposed on the driving structure layer. A portion of the touch layer is disposed on the curved region of the substrate. At least a portion of the plurality of recesses is disposed on the curved region of the substrate.

[0007] A display device according to an embodiment of the present invention includes a substrate, a driving structure layer, a display structure layer, and a touch layer. The substrate includes a curved region and a main region adjacent to the curved region. The driving structure layer is disposed on the substrate. The driving structure layer includes a crack-preventing element. The display structure layer is disposed on the driving structure layer. The touch layer is disposed on the driving structure layer. A portion of the touch layer is disposed on the curved region of the substrate. At least a portion of the crack-preventing element is disposed on the curved region of the substrate.

[0008] Based on the above, in this invention, the driving structure layer includes multiple recesses. According to some embodiments, the propagation of microcracks can be mitigated, or the durability of the display device can be improved.

[0009] To better understand the above features and advantages of the present invention, several embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0010] The accompanying drawings are included to facilitate a further understanding of the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0011] Figure 1 This is a schematic cross-sectional view of a display device according to an embodiment of the present invention;

[0012] Figures 2 to 4 This is a schematic top view of a display device according to three embodiments of the present invention;

[0013] Figure 5 This is a schematic top view of a display device according to another embodiment of the present invention;

[0014] Figure 6 This is a schematic partially enlarged cross-sectional view of a display device according to an embodiment of the present invention;

[0015] Figure 7 This is a schematic partially enlarged cross-sectional view of a display device according to an embodiment of the present invention;

[0016] Figure 8 This is a schematic partially enlarged cross-sectional view of a display device according to an embodiment of the present invention;

[0017] Figure 9 This is a schematic partially enlarged cross-sectional view of a display device according to an embodiment of the present invention;

[0018] Figure 10 This is a schematic partially enlarged cross-sectional view of a plurality of recesses in a display device according to an embodiment of the present invention;

[0019] Figure 11 This is a schematic partially enlarged cross-sectional view of a plurality of recesses in a display device according to another embodiment of the present invention;

[0020] Figure 12 This is a schematic partially enlarged cross-sectional view of a plurality of recesses in a display device according to an embodiment of the present invention;

[0021] Figures 13A to 13E This is a schematic partial enlarged top view of a corner of a display device according to five embodiments of the present invention;

[0022] Figure 14 yes Figure 13A Schematic cross-section along line II;

[0023] Figures 15A to 15H This is a schematic enlarged top view of the straight edge of a display device according to eight embodiments of the present invention.

[0024] Explanation of icon numbers

[0025] 100, 300, 400, 500, 600: Display devices;

[0026] 110, 210A-210D: Substrate;

[0027] 112: Curved area;

[0028] 114: Main area;

[0029] 116, 142: Edges;

[0030] 118: Surface;

[0031] 120: Driving structure layer;

[0032] 122, 122A1-122A3, 122B, 122C, 122D, 222A-222D, 722, 722A-722F, 822A-822H: recess;

[0033] 122AS, 122B1, 122CS, 122DS: Sidewalls;

[0034] 122AB, 122CB, 122DB: Bottom;

[0035] 124: Thin-film transistor;

[0036] 126A: Buffer layer;

[0037] 126B: Gate insulating layer;

[0038] 126C: Protective layer;

[0039] 126D: Planarization layer;

[0040] 130, 230, 630: Display structure layers;

[0041] 132: Pixel electrode layer;

[0042] 134: Emissive layer;

[0043] 136: Common electrode layer;

[0044] 138: Pixel delimitation layer;

[0045] 140, 240, 440: Touch layer;

[0046] 150: Cover layer;

[0047] 160: Organic layer;

[0048] 180: Insulation structure;

[0049] 442: Upper touch electrode layer;

[0050] 444: Lower touch electrode layer;

[0051] 540: Touch electrode layer;

[0052] 632: Miniature LED;

[0053] 632A: First electrode;

[0054] 632B: Type I doped semiconductor layer;

[0055] 632C: Quantum well layer;

[0056] 632D: Type II doped semiconductor layer;

[0057] 632E: Second electrode;

[0058] 722A1, 722B1: Curved edges;

[0059] 1241: Active layer;

[0060] 1242: Gate layer;

[0061] 1243: Source / Drain layer;

[0062] I12: First silicon oxide layer;

[0063] I14: First silicon nitride layer;

[0064] I16: Second silicon oxide layer;

[0065] I18: Second silicon nitride layer;

[0066] T12, T14, T16, T18, T20: Thickness;

[0067] W12, W14: Width;

[0068] D12, D14, D21, D22: Depth;

[0069] D1, D2: Direction;

[0070] D10: Distance. Detailed Implementation

[0071] Reference will now be made in detail to the presently preferred embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numerals are used in the drawings and description to refer to the same or similar parts.

[0072] The foregoing and other technical contents, features, and effects of the present invention will be clearly presented in the following detailed description of embodiments with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as up, down, left, right, front, or back, are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for illustrative purposes and not for limiting the present invention. For example, in the following description, when a first object is mentioned above a second object, it may include embodiments where the first and second objects are in direct contact, and it may also include embodiments where the first and second objects are not in direct contact. Furthermore, in embodiments where the first and second objects are not in direct contact, there may be other objects or simply space between the first and second objects. Figure 1 This is a schematic cross-sectional view of a display device according to an embodiment of the present invention. See also... Figure 1 The display device 100 includes a substrate 110, a driving structure layer 120, a display structure layer 130, and a touch layer 140. The substrate 110 can be a flexible substrate or a rigid substrate. A flexible substrate can be made of plastic, and a rigid substrate can be made of glass, but is not limited thereto. The substrate 110 has a curved region 112 and a main region 114 adjacent to the curved region 112. The curved region 112 can be considered as a curved portion of the substrate 110, while the main region 114 can be considered as an uncurved portion of the substrate 110. In some embodiments, the main region 114 can be flat. However, in other embodiments, the main region 114 can be non-flat and includes an uneven or curved surface. The degree of curvature of the curved region 112 can be greater than that of the main region 114. In other words, the maximum curvature of the curved region 112 is greater than the maximum curvature of the main region 114.

[0073] The bending process can be performed before the display device is presented to the consumer (or user). Figure 1 The image shows the display device's substrate 110 in a bent state. Alternatively, according to some embodiments, when a flexible substrate is used as the substrate, the bending process can be performed by the consumer. That is, originally, the display device's substrate could be flat, and then the consumer can bend the substrate to create a curved area as required, thus obtaining... Figure 1 The display device shown. In this invention, the curved area may represent a portion that has been bent, or a portion that will be bent by the consumer.

[0074] A drive structure layer 120 is disposed on a substrate 110. The drive structure layer 120 includes an insulating structure. The insulating structure includes a plurality of recesses 122. The plurality of recesses 122 can serve as crack preventers. The recesses can be in the form of openings or slits. A display structure layer 130 is disposed on the drive structure layer 120. A touch layer 140 is disposed on the drive structure layer 120. A portion of the touch layer 140 is disposed on a curved region 112 of the substrate 110. At least a portion of the plurality of recesses 122 is disposed on the curved region 112 of the substrate 110.

[0075] Because the driving structure layer 120 includes a plurality of recesses 122 disposed on the curved region 112 of the substrate 110, even if there are microcracks at the edges of the substrate 110 and / or the edges of the driving structure layer 120, the propagation of microcracks can be prevented by the plurality of recesses 122. In this way, the propagation of microcracks can be mitigated, or the yield of the substrate 110, the driving structure layer 120, the display structure layer 130 and the touch layer 140 can be increased, or the durability of the display device can be improved. At the same time, there may be no need to worry about repeated bending causing microcracks to propagate on the display device 100.

[0076] The driving structure layer 120 may include, but is not limited to, driving circuitry and driving components comprised of multiple insulating and conductive layers. The display structure layer 130 may include, but is not limited to, multiple organic light-emitting diode (OLED) components, multiple micro-LEDs, or other suitable display structures. The touch layer 140 may include, but is not limited to, multiple insulating and conductive layers. The driving structure layer 120, display structure layer 130, and touch layer 140 may not be explicitly separated. For example, in some embodiments, a portion of the touch layer 140 may be located between the driving structure layer 120 and the display structure layer 130, and another portion of the touch layer 140 may be located on the display structure layer 130. The curved region 112 of the substrate 110 is a curved portion of the substrate 110. The curved region 112 may be as follows: Figure 1 The bending area is shown on one side of the substrate 110. However, if the display device is designed to be foldable like a book, the bending area can be in the middle of the substrate, but is not limited to this. Figure 1 The diagram is provided for ease of understanding of this embodiment.

[0077] Figures 2 to 4 This is a schematic top view of a display device according to three embodiments of the present invention. The areas filled with halftone dots are the locations of multiple recessed portions. Figures 2 to 4In the display device, a plurality of recesses 222A, 222B, and 222C are distributed around the touch layer 240. The recesses 222A, 222B, and 222C are located at the edges of substrates 210A, 210B, and 210C. The recesses 222A and 222B are distributed in continuous strip areas, while the recesses 222C are distributed in discontinuous strip areas, but are not limited thereto. The substrates 210A and 210B have different shapes, but are not limited thereto. Figure 5 This is a schematic top view of a display device according to another embodiment of the present invention. On the other hand, as... Figure 5 As shown, the distribution of multiple recesses 222D surrounds the structure layer 230. The substrate 210D and the substrate 210A have the same shape. Figures 2 to 5 The four embodiments include a display structure layer and a touch layer, but each embodiment only shows one of the display structure layer and the touch layer. Figures 2 to 5 In this configuration, the substrate (210A, 210B, 210C, or 210D) can be bent at the edge to form a curved region. For example, in... Figure 2 In the diagram, three dashed lines are shown. The base 210A can be bent along at least one of these dashed lines to form a curved region 112. Similarly, regarding... Figures 3 to 5 The display device shown in the figure may have a substrate that can be bent along at least one of the dashed lines to form a curved area, but is not limited thereto.

[0078] See Figure 1 The substrate 110 further includes a first edge 116, and the touch layer 140 includes a second edge 142 adjacent to the first edge 116. A portion of a plurality of recesses 122 is disposed between the first edge 116 and the second edge 142. The minimum distance between a portion of the plurality of recesses 122 and the first edge 116 is a first distance D10, and the first distance D10 is between 0.1 micrometers and 1000 micrometers, but is not limited thereto. In this embodiment, the display structure layer 130 is completely covered by the touch layer 140. Since the plurality of recesses 122 are disposed between the first edge 116 and the second edge 142, the plurality of recesses 122 are located outside the display structure layer 130. Therefore, the plurality of recesses outside the display structure layer 130 can prevent the propagation of microcracks and keep microcracks away from the display structure layer 130.

[0079] Figure 6 This is a schematic, partially enlarged cross-sectional view of a display device according to an embodiment of the present invention. See also... Figure 6 Display device 300 and Figure 1The display device 300 is similar to the display device 100, and its similar details will not be repeated. The main difference between the two is that the display device 300 also includes a cover layer 150. The cover layer 150 is disposed between the display structure layer 130 and the touch layer 140. The cover layer 150 protects the display structure layer 130 and the driving structure layer 120 from degradation due to moisture penetration, post-processing, etc. In this embodiment, the cover layer 150 also provides a flat surface for mounting the touch layer 140. The cover layer 150 may include multiple stacked layers, which may include inorganic layers and organic layers between inorganic layers. In this embodiment, the display structure layer 130 includes a pixel electrode layer 132, a light-emitting layer 134, and a common electrode layer 136. A pixel defining layer 138 is disposed on the pixel electrode layer 132 and has an opening. The light-emitting layer 134 is disposed in the opening of the pixel defining layer 138 and between the pixel electrode layer 132 and the common electrode layer 136 to form a light-emitting OLED for emitting light to form an image for the user. The pixel electrode layer 132 can be an anode, and the common electrode layer 136 can be a cathode. Alternatively, the pixel electrode layer 132 can be a cathode, and the common electrode layer 136 can be an anode.

[0080] See Figure 6 The driving structure layer 120 may further include an insulating structure 180. The insulating structure 180 may include, for example: Figure 1 The diagram shows multiple recesses 122. In some embodiments, the insulating structure 180 may include at least one insulating layer. In some embodiments, the insulating structure 180 may include multiple insulating layers. The insulating layer may be a planarization layer, a gate insulating layer, a buffer layer, a protective layer, etc., but is not limited thereto. Specifically, in some embodiments, the driving structure layer 120 includes multiple thin film transistors (TFTs) 124. Figure 6 Only one TFT 124 is shown. TFT 124 can be electrically connected to pixel electrode layer 132 and control the light-emitting OLED. TFT 124 may include a buffer layer 126A, an active layer 1241, a gate layer 1242, a gate insulating layer 126B, a protective layer 126C, a source / drain layer 1243, and a planarization layer 126D. The buffer layer 126A is disposed on substrate 110 and between substrate 110 and active layer 1241. Gate insulating layer 126B is disposed between active layer 1241 and gate layer 1242. Protective layer 126C covers gate layer 1242, and planarization layer 126D covers source / drain layer 1243. Figure 6In this TFT structure, the insulating structure 180 may include at least one of the following layers: buffer layer 126A, gate insulating layer 126B, protective layer 126C, and planarization layer 126D, but is not limited thereto. For example, in another embodiment, the insulating layer 180 may include only the buffer layer 126A, gate insulating layer 126B, and protective layer 126C, but is not limited thereto.

[0081] Figure 7 This is a schematic, partially enlarged cross-sectional view of a display device according to an embodiment of the present invention. See also... Figure 7 Display device 400 and Figure 6 The display device 400 is similar to the display device 300, and its similarities will not be described in detail. The main difference between the two display devices is that the touch layer 440 of the display device 400 includes an upper touch electrode layer 442 and a lower touch electrode layer 444. The upper touch electrode layer 442 is disposed on the cover layer 150, and the lower touch electrode layer 444 is disposed between the display structure layer 130 and the cover layer 150. The lower touch electrode layer 444 and the common electrode layer 136 can be the same layer and can be made of the same material. Specifically, firstly, an electrode layer can be formed, and then the electrode layer can be patterned by photolithography to form the lower touch electrode layer 444 and the common electrode layer 136.

[0082] Figure 8 This is a schematic, partially enlarged cross-sectional view of a display device according to an embodiment of the present invention. See also... Figure 8 Display device 500 and Figure 6 The display device 500 is similar to the display device 300, and its similarities will not be described in detail. The main difference between the two display devices is that the touch electrode layer 540 of the display device 500 is disposed between the display structure layer 130 and the driving structure layer 120. The touch electrode layer 540 and the pixel electrode layer 132 can be the same layer and can be made of the same material. Specifically, firstly, an electrode layer can be formed, and then the electrode layer can be patterned by photolithography to form the touch electrode layer 540 and the pixel electrode layer 132. Alternatively, the touch electrode layer 540 can be the same layer as the source / drain layer 1243 and made of the same material.

[0083] Figure 9 This is a schematic, partially enlarged cross-sectional view of a display device according to an embodiment of the present invention. See also... Figure 9 Display device 600 and Figure 6The display device 600 is similar to the display device 300, and its similarities will not be described in detail. The main difference between the two display devices is that the display structure layer 630 of the display device 600 includes a plurality of micro-LEDs 632. In this embodiment, two micro-LEDs 632 may be disposed in one pixel. In another embodiment, only one micro-LED 632 may be disposed in one pixel, but this is not a limitation. Each micro-LED 632 includes a first electrode 632A, a first type doped semiconductor layer 632B, a quantum well layer 632C, a second type doped semiconductor layer 632D, and a second electrode 632E. The first type doped semiconductor layer and the second type doped semiconductor layer may be of different doping types. For example, the first type may be N-doped and the second type may be P-doped, or vice versa. For illustrative purposes, the micro-LED 632 in this embodiment is a vertical LED. However, in other embodiments, flip-chip LEDs or other light-emitting devices may also be used in the display structure layer 630. When the micro-LED 632 is bonded to the display device 600, the substrate 110 is subjected to compression, increasing the likelihood of micro-crack propagation. Therefore, a plurality of recesses 122 (such as...) are provided. Figure 1 The insulation structure 180 (as shown) is very important.

[0084] Figure 10 This is a schematic, partially enlarged cross-sectional view of an insulating structure having multiple recessed structures in a curved region of a display device according to an embodiment of the present invention. As described above, the insulating structure 180 may include at least one insulating layer, or it may include multiple insulating layers. When the insulating structure 180 includes multiple insulating layers, the multiple recesses may have different depths. For example, in Figure 10 In the insulating structure 180, a buffer layer 126A, a gate insulating layer 126B, and a protective layer 126C may be included. The insulating structure 180 may include multiple recesses on the main region and on the curved region. Figure 10 A portion of a plurality of recesses on a curved region is shown. Recesses 122A1, 122A2, and 122A3 are formed in insulating structure 180. Recess 122A1 is formed in protective layer 126C, recess 122A2 is formed in protective layer 126C and gate insulating layer 126B, and recess 122A3 is formed in protective layer 126C, gate insulating layer 126B, and buffer layer 126A. Surface 118 of substrate 110 is exposed only in some of the recesses, but not in the others. For example, as... Figure 10 As shown, the surface 118 of the substrate 110 is exposed through the recess 122A3, but not through the recesses 122A1 and 122A2, but is not limited thereto.

[0085] See Figure 10The insulating structure 180 includes, but is not limited to, recesses 122A1, 122A2, and 122A3 of different depths. Recesses of different depths can prevent the propagation of microcracks occurring at different depths. See also... Figure 10 The recess 122A3 includes a sidewall 122AS and a bottom 122AB. The insulating structure 180 includes an angle θ formed by the sidewall 122AS and the bottom 122AB, and the angle θ can be between 10° and 80°. In experiments, when the angle θ is 90°, the propagation probability of the microcrack is 23%, and when the angle θ is 80°, 60°, 50°, 20°, and 10°, the propagation probabilities of the microcrack are 10%, 8%, 7%, 9%, and 7%, respectively. In some embodiments, the angle θ can be between 10° and 80°. In some embodiments, the angle θ can be between 20° and 60°.

[0086] The sidewalls of the recesses included in the insulating structure 180 may be smooth or may have a stepped profile. For example, as Figure 10 As shown, the sidewalls of recesses 122A1, 122A2, and 122A3 are smooth. However, as... Figure 11 The sidewall 122B1 of the recess 122B shown has a step 122B2, but is not limited thereto.

[0087] See Figure 11 A recess 122B is formed in the insulating structure 180. The insulating structure 180 may include, but is not limited to, stacked insulating layers comprising a first silicon oxide layer I12, a first silicon nitride layer I14, a second silicon oxide layer I16, and a second silicon nitride layer I18. The total thickness of the silicon oxide layers (such as the sum of the thickness T12 of the first silicon oxide layer I12 and the thickness T16 of the second silicon oxide layer I16) may be greater than the total thickness of the silicon nitride layers (such as the sum of the thickness T14 of the first silicon nitride layer I14 and the thickness T18 of the second silicon nitride layer I18). For example, the total thickness of the silicon oxide layers may be greater than the total thickness of the silicon nitride layers. For example, the ratio of the total thickness of the silicon oxide layers to the total thickness of the silicon nitride layers may be greater than 1.5 times and less than 15 times.

[0088] Figure 12 This is a schematic, partially enlarged cross-sectional view of an insulating structure having multiple recessed structures in a curved region of a display device according to an embodiment of the present invention. The insulating structure 180 may include multiple recesses in the main region and the curved region. Figure 12 A portion of several recesses on a curved area is shown. See also... Figure 12 The insulating structure 180 includes a first recess 122C and a second recess 122D. The minimum width of the first recess 122C is a first width W12, and the minimum width of the second recess 122D is a second width W14. The first width W12 is different from the second width W14, but is not limited thereto.

[0089] The first recess 122C has a first depth D12, and the second recess 122D has a second depth D14, the first depth D12 being different from the second depth D14. Therefore, the propagation of microcracks occurring at different depths can be prevented. The first recess 122C includes a first sidewall 122CS and a first bottom 122CB, and the second recess 122D includes a second sidewall 122DS and a second bottom 122DB. The insulating structure 180 includes a first angle θ1 formed by the first sidewall 122CS and the first bottom 122CB, and a second angle θ2 formed by the second sidewall 122DS and the second bottom 122DB. The first angle θ1 and the second angle θ2 can be in the range of 10° to 80°, for example, in the range of 20° to 60°. The first angle θ1 and the second angle θ2 can be the same or different. The quotient obtained by dividing the first angle θ1 by the second angle θ2 can be less than 1.5 and greater than 0.8. The angle at the top of the first recess 122C can be as follows: Figure 12 The diagram shows a smooth profile. Therefore, the mitigation effect of microcrack propagation can be further enhanced.

[0090] In some embodiments, the display device of this embodiment may further include an organic layer 160 covering a first recess 122C and a second recess 122D among a plurality of recesses. In some embodiments, the organic layer 160 may be manufactured by means of, Figure 6 The cover layer 150 shown is formed using the same manufacturing process as the organic layer or other layers, but the organic layer 160 can be formed using the same process as... Figure 6 The organic layer 160 may be a different layer than the layer shown, but is not limited thereto. Alternatively, in some embodiments, the organic layer 160 may be the same layer as the pixel defining layer 138 of the display structure layer 130. The organic layer 160 may alleviate stress concentration at multiple recesses and may mitigate the propagation of microcracks. The thickness T20 of the organic layer 160 may be greater than the first depth D12 of the first recess 122C and the second depth D14 of the second recess 122D. The thickness T20 of the organic layer 160 may be more than 1.5 times the first depth D12 of the first recess 122C and / or more than 1.5 times the second depth D14 of the second recess 122D.

[0091] Figures 13A to 13E This is a schematic, partially enlarged top view of a corner of a display device according to five embodiments of the present invention. For example, Figures 13A to 13E The corner shown in the image can be displayed. Figure 2 Region C in the middle. Figures 13A to 13E It is shown from a microscopic viewpoint, and Figures 2 to 5 It is shown from a macroscopic viewpoint. (and) Figures 13A to 13E Multiple similar recesses can be distributed in Figures 2 to 5 The area shown contains the dots. See also... Figure 13AIn a portion of a plurality of recesses on a curved region, the plurality of recesses 722 include at least one first recess 722A and at least one second recess 722B. In this embodiment, the plurality of first recesses 722A and the plurality of second recesses 722B may be disposed in an insulating structure 180, but are not limited thereto. The first recess 722A extends along a first direction D1, and the second recess 722B extends along a second direction D2, the first direction D1 being different from the second direction D2. The first direction D1 may be perpendicular to the second direction D2, but is not limited thereto. The first recess 722A and the second recess 722B may be disposed on the curved region. The fact that the first recess 722A and the second recess 722B extend in different directions can prevent the propagation of microcracks occurring in different directions. At the same time, the first recess 722A and the second recess 722B may have arcuate edges 722A1 and 722B1 to reduce cusp angles, thereby mitigating the occurrence of microcracks at cusp angles, but are not limited thereto.

[0092] According to some embodiments, the recesses in the insulating structure can have various depths and various widths. For example, see... Figure 13A and Figure 14 The minimum width of the first recess 722A is a first width W1, and the minimum width of the second recess 722B is a second width W2. The first width W1 may be different from the second width W2. In addition, the first recess 722A has a first depth D21, and the second recess 722B1 has a second depth D22, and the first depth D21 may be different from the second depth D22.

[0093] See Figure 13B The plurality of recesses includes recesses 722C extending in four different directions. See also Figure 13C The plurality of recesses includes recess 722D, which has a continuous cross shape. See also Figure 13D The plurality of recesses includes recess 722E, which has a continuous cross shape and a straight line shape. See also Figure 13E The plurality of recesses include recess 722F, which has a curved shape and a straight shape.

[0094] Figures 15A to 15H This is a schematic, partially enlarged top view of the straight edge of a display device according to eight embodiments of the present invention. See also... Figure 15A The plurality of recesses includes a series of recesses 822A having an S-shape. See also Figure 15B The plurality of recesses includes a plurality of recesses 822B, which have a relatively wide straight line shape. See also Figure 15C The plurality of recesses includes a plurality of recesses 822C, which have a fine, straight shape. See also Figure 15D The plurality of recesses includes a plurality of recesses 822D, which have a circular shape. See also Figure 15E The plurality of recesses includes a plurality of recesses 822E, which have a continuous cross shape. See also Figure 15F The plurality of recesses includes a plurality of recesses 822F, which have a spiral shape. See also Figure 15G The plurality of recesses includes a plurality of recesses 822G, which have a continuous S-shape with a relatively wide spacing. See also Figure 15H The plurality of recesses include a plurality of recesses 822H, which have a continuous S-shape with a narrow spacing.

[0095] In view of the foregoing, in the display device according to an embodiment of the present invention, due to the effect of the multiple recesses in the driving structure layer, microcracks will not propagate to the display area of ​​the display device. The mitigation effect of microcrack propagation is even more important for foldable display devices. The display device of the present invention has better reliability or can maintain display quality well.

[0096] It will be apparent to those skilled in the art that various modifications and variations can be made to the structure of the invention without departing from the scope or spirit of the invention. In view of the foregoing, it is intended that this invention cover modifications and variations that fall within the scope of the appended claims and their equivalents.

Claims

1. A display device, characterized in that, include: The substrate includes a curved region and a first edge; A driving structure layer disposed on the substrate and including a second edge adjacent to the first edge, wherein the driving structure layer includes an insulating structure including a plurality of recesses, and the first edge of the substrate is located outside the driving structure layer; as well as A touch layer disposed on the driving structure layer and including a third edge adjacent to the second edge, wherein a portion of the touch layer is disposed on the curved region of the substrate, and the second edge of the driving structure layer is located outside the touch layer. The minimum distance between one edge of a portion of the plurality of recesses and the first edge is a first distance, and the first distance is greater than or equal to 10 micrometers and less than or equal to 140 micrometers. The first edge, the second edge, and the third edge do not overlap, and the second edge is positioned between the first edge and the third edge.

2. The display device according to claim 1, wherein the plurality of recesses are completely covered by an organic layer.

3. The display device according to claim 2, wherein the sidewall of the organic layer is arc-shaped.

4. The display device according to claim 2, wherein the plurality of recesses include a first recess and a second recess, the first recess having a first depth, the second recess having a second depth, and the thickness of the organic layer being greater than the first depth and the second depth.

5. The display device according to claim 4, wherein the thickness of the organic layer is greater than 1.5 times the first depth and 1.5 times the second depth.

6. The display device according to claim 2, wherein the first recess of the plurality of recesses has a first sidewall, the insulating structure has an insulating structure edge, and the insulating structure edge is located between the first sidewall and the sidewall of the organic layer.

7. The display device of claim 1, wherein the plurality of recesses surround the touch layer in a top view.

8. The display device of claim 1, wherein the driving structure layer comprises an active layer, a gate layer, and a source / drain layer, the insulating structure comprises a buffer layer, a gate insulating layer, and a protective layer sequentially stacked in a direction away from the substrate, the buffer layer being disposed between the substrate and the active layer, the gate insulating layer being disposed between the active layer and the gate layer, the protective layer being disposed between the gate layer and the source / drain layer, and the plurality of recesses being formed by penetrating at least one of the buffer layer, the gate insulating layer, and the protective layer.

9. The display device according to claim 8, wherein the plurality of recesses include a first recess, a second recess, and a third recess, the first recess being formed by penetrating the protective layer, the second recess being formed by penetrating the gate insulating layer and the protective layer, and the third recess being formed by penetrating the buffer layer, the gate insulating layer, and the protective layer.

10. The display device according to claim 1, wherein the plurality of recesses includes a first recess and a second recess, the first recess having a first sidewall, the second recess having a second sidewall, and the first sidewall and the second sidewall having a stepped structure.

11. The display device according to claim 1, wherein the plurality of recesses include a first recess and a second recess, the first recess includes a first sidewall and a first bottom, the second recess includes a second sidewall and a second bottom, the first sidewall and the first bottom have a first angle, the second sidewall and the second bottom have a second angle, and the first angle and the second angle are different.

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