Display module and display device

Abstract

The present disclosure relates to a display module and a display device. The display module comprises a cover plate and a touch substrate. The touch substrate comprises a first touch part. The first touch part is arranged on a bending area of the cover plate. The first touch part comprises at least two first touch units arranged adjacently. When a user slides his hand on the first touch part of the bending area, the capacitance value of the first touch unit contacted first among the two adjacent first touch units decreases continuously, and the capacitance value of the first touch unit contacted later increases continuously. A driving chip can recognize the touch instruction of the bending area through the capacitance value change of the two adjacent first touch units, so as to recognize the sliding operation of the user and realize the control function of the knob. Therefore, a notch for installing the knob is not needed on the cover plate, and the problem of poor waterproof performance of the wearable display device is solved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of display, in particular, to a display module and a display device. BACKGROUND

[0002] With the continuous development of display technology, wearable display devices are more and more favored by people. For example, smart watches, smart glasses, smart bracelets and the like.

[0003] The existing wearable device has a notch on the cover plate for mounting a knob. The machining precision of the notch is low and the assembly process of the knob has errors, resulting in poor waterproof performance of the wearable display device.

[0004] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present disclosure, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0005] The purpose of the present disclosure is to solve the problem of poor waterproof performance of wearable display devices in the case of implementing knob control function, and to provide a display module and a display device.

[0006] According to one aspect of the present disclosure, a display module is provided, comprising a display substrate, a cover plate and a touch substrate, the cover plate comprising a flat area and a bending area provided at the periphery of the flat area, the bending area being close to the edge of the display substrate, the flat area being close to the display surface of the display substrate, and the flat area intersecting with the bending area; the touch substrate comprising a first touch part, the first touch part being provided in the bending area, the first touch part comprising at least two first touch units arranged adjacently, and the touch instruction of the bending area being recognized by the change of the capacitance value of the two first touch units.

[0007] In one embodiment of the present disclosure, the plurality of first touch units are arranged in sequence along the extension direction of the edge of the bending area, the shape of the touch substrate is an axisymmetric figure, and the plurality of first touch units are divided into two groups of first touch units along the axis of symmetry.

[0008] In one embodiment of the present disclosure, the group of first touch units comprises at least two first sub-touch units, and the orthogonal projection of one first sub-touch unit on the plane where the flat area is located and the orthogonal projection of the other first sub-touch unit on the plane where the flat area is located overlap with each other.

[0009] In one embodiment of the present disclosure, in the thickness direction of the display module, the first sub touch control unit comprises a first segment and a second segment, the width of the second segment is smaller than the width of the first segment, the second segment is arranged at one end of the first segment along the length direction of the bending area, the second segment of one of the first sub touch control units is arranged close to the flat area, the second segment of the other first sub touch control unit is arranged away from the flat area, the second segments of the two first sub touch control units overlap each other, and the first segment of one first sub touch control unit and the second segment of the other first sub touch control unit contact each other.

[0010] In one embodiment of the present disclosure, the connection between the second segment and the first segment is not smooth, the first matching surface of the two first sub touch control units is a stepped surface, the first matching surface comprises a first surface, a second surface and a third surface, the first surface and the second surface are located in the second segment, and the third surface is located in the first segment, the first surface is parallel to the length direction of the first sub touch control unit, the second surface and the third surface are perpendicular to the length direction of the first sub touch control unit, the first surface of one first sub touch control unit and the first surface of the other first sub touch control unit contact each other, and the second surface of one first sub touch control unit and the third surface of the other first sub touch control unit contact each other.

[0011] In one embodiment of the present disclosure, the first touch control unit group comprises two first sub touch control units and at least one second sub touch control unit, the second sub touch control unit is arranged between the two first sub touch control units, and the orthogonal projection of the second sub touch control unit on the plane where the flat area is located overlaps with the orthogonal projection of the two first sub touch control units on the plane where the flat area is located.

[0012] In one embodiment of the present disclosure, the first sub touch control unit comprises a first segment and a second segment, the width of the second segment is smaller than the width of the first segment, in the thickness direction of the display module, the second segment is arranged at one end of the first segment along the length direction of the flat area, one of the second segments of the first sub touch control units is arranged close to the flat area, and the second segment of the other first sub touch control unit is arranged away from the flat area; the second sub touch control unit comprises a third segment and two fourth segments, the width of the fourth segment is smaller than the width of the third segment in the thickness direction of the display module, and the fourth segment is arranged at both ends of the third segment along the length direction of the bending area, one of the fourth segments is arranged close to the flat area, and the other fourth segment is arranged away from the flat area, the two fourth segments overlap with the second segments of the two first sub touch control units respectively, and the two fourth segments contact the first segments of the two first sub touch control units.

[0013] In one embodiment of the present disclosure, the first segment and the second segment of the first sub touch control unit are provided with protrusions and / or recesses, the third segment and the fourth segment of the second sub touch control unit are provided with recesses and / or protrusions, and the protrusions are arranged in the recesses.

[0014] In one embodiment of the present disclosure, two or more second sub touch units are provided, and the orthographic projection of one second sub touch unit on the plane of the flat area overlaps with the orthographic projection of another second sub touch unit on the plane of the flat area.

[0015] In one embodiment of the present disclosure, in the thickness direction of the display module, the fourth section of one second sub touch unit arranged close to the flat area overlaps with the fourth section of another second sub touch unit arranged away from the flat area, and the fourth section of one second sub touch unit contacts with the third section of another second sub touch unit.

[0016] In one embodiment of the present disclosure, in the two second sub touch units contacting with each other, the third section and the fourth section of one second sub touch unit are provided with protrusions and / or recesses, and the third section and the fourth section of another first sub touch unit are provided with recesses and / or protrusions, and the protrusions are arranged in the recesses.

[0017] In one embodiment of the present disclosure, the connection between the second section and the first section is smoothly transitioned, the connection between the fourth section and the third section is smoothly transitioned, the first matching surface of the first sub touch unit is an outer convex arc surface, and the second matching surface of the second sub touch unit is an inner concave arc surface matching with the outer convex arc surface.

[0018] In one embodiment of the present disclosure, the connection between the second section and the first section is not smoothly transitioned, the connection between the fourth section and the third section is not smoothly transitioned, the first matching surface of the first sub touch unit is a stepped surface, and the second matching surface of the second sub touch unit is a stepped surface; the first matching surface comprises a first surface, a second surface and a third surface, the first surface and the second surface are located on the second section, the third surface is located on the first section, the first surface is parallel to the length direction of the first sub touch unit, and the second surface and the third surface are perpendicular to the length direction of the first sub touch unit; the second matching surface comprises a fourth surface, a fifth surface and a sixth surface, the fourth surface and the fifth surface are located on the fourth section, the sixth surface is located on the third section, the fourth surface is parallel to the length direction of the second sub touch unit, and the fifth surface and the sixth surface are perpendicular to the length direction of the second sub touch unit; the two fourth surfaces of the second sub touch unit contact with the first surfaces of the two first sub touch units respectively, the two fifth surfaces of the second sub touch unit contact with the third surfaces of the two first sub touch units respectively, and the two sixth surfaces of the second sub touch unit contact with the second surfaces of the two first sub touch units respectively.

[0019] In one embodiment of the present disclosure, the length of the first sub touch unit is 1 / 2-2 / 3 of the length of the second sub touch unit.

[0020] In one embodiment of the present disclosure, the flat area includes a wiring area, the wiring area is adjacent to the bending area, the touch substrate further includes a touch binding portion and a plurality of first touch signal lines, the touch binding portion is disposed in the wiring area, the binding portion includes a plurality of touch binding pins; the plurality of first touch signal lines are disposed in the wiring area, one end of the first touch signal line is connected to the first touch unit, and the other end is connected to the touch binding pin.

[0021] In one embodiment of the present disclosure, the first touch signal line includes a first connection segment, a second connection segment and a third connection segment, one end of the first connection segment is connected to the first touch unit, and the other end extends to be close to the symmetry axis; one end of the second connection segment is connected to the other end of the first connection segment, and the other end is away from the first touch unit along the extension direction of the symmetry axis; one end of the third connection segment is connected to the other end of the second connection segment, and the other end extends to be connected to the touch binding pin along the length direction of the bending area.

[0022] In one embodiment of the present disclosure, the flat area further includes a touch area, the touch substrate further includes a second touch portion and a second touch signal line, the second touch portion is disposed in the touch area, one side of the second touch portion is connected to the display substrate, the side away from the display substrate is connected to the touch area, the second touch portion includes a plurality of second touch units; the second touch signal line extends to be connected to the touch binding pin through the gap between the second touch units and / or the area between the first touch signal line and the touch area in the wiring area.

[0023] In one embodiment of the present disclosure, the first touch portion at least surrounds part of the second touch portion.

[0024] In one embodiment of the present disclosure, the display module further includes a touch flexible circuit board and a main flexible circuit board, the touch flexible circuit board includes a first binding portion and a second binding portion, the first binding portion includes a plurality of first binding pins, the second binding portion includes a plurality of second binding pins, the first binding pin is bound with the touch binding pin, and the touch flexible circuit board is folded from the side of the touch substrate facing away from the touch surface; the main flexible circuit board is disposed on the non-display surface of the display substrate, the main flexible circuit board includes a third binding pin, and the third binding pin is bound with the second binding pin.

[0025] According to another aspect of the present disclosure, a display device is provided, including the display module according to one aspect of the present disclosure.

[0026] The display module of the present disclosure comprises a cover plate and a touch substrate, the touch substrate comprises a first touch part, the first touch part is arranged on a bending area of the cover plate, the first touch part comprises at least two first touch units arranged adjacently, when a user slides his hand on the first touch part of the bending area, the capacitance value of the first touch unit contacted first among the two first touch units decreases continuously, and the capacitance value of the first touch unit contacted last increases continuously, the driving chip can recognize the touch instruction of the bending area through the capacitance value change of the two first touch units, so as to recognize the sliding operation of the user, realize the control function of the knob, and thus the notch for installing the knob on the cover plate is not needed, and the problem of poor waterproof performance of the wearable display device is solved.

[0027] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0028] The drawings incorporated into the specification and forming a part thereof show embodiments consistent with the present disclosure and serve to explain the principles of the present disclosure. It is apparent that the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0029] Figure 1 A structural schematic diagram of a display device related to an embodiment of the present disclosure.

[0030] Figure 2 A structural schematic diagram of another display device related to an embodiment of the present disclosure.

[0031] Figure 3 A partial structural schematic diagram of a touch substrate related to an embodiment of the present disclosure.

[0032] Figure 4 A partial structural schematic diagram of another touch substrate related to an embodiment of the present disclosure.

[0033] Figure 5 A partial structural schematic diagram of another touch substrate related to an embodiment of the present disclosure.

[0034] Figure 6 A partial structural schematic diagram of another touch substrate related to an embodiment of the present disclosure. Figure 5 A-A sectional view of the

[0035] Figure 7 B-B sectional view of the Figure 5

[0036] A partial enlarged view of the A part of the Figure 8 Figure 4 A partial enlarged view of the A part of the​

[0037] Figure 9 for Figure 4 A magnified view of part B.

[0038] Figure 10 This is a planar schematic diagram of another touch substrate according to an embodiment of this disclosure.

[0039] Figure 11 This is a plan view of the display substrate involved in the embodiments of this disclosure.

[0040] Figure 12 This is a cross-sectional schematic diagram of the display substrate involved in the embodiments of this disclosure.

[0041] Figure 13 This is a schematic diagram illustrating another display device switching application according to an embodiment of the present disclosure.

[0042] Figure 14 This is another schematic diagram illustrating the application switching of a display device according to an embodiment of this disclosure.

[0043] Figure 15 This is a schematic diagram illustrating the addition of volume to another display device according to an embodiment of this disclosure.

[0044] Figure 16 This is a schematic diagram illustrating the volume reduction of another display device according to an embodiment of this disclosure.

[0045] Figure 17 This is a schematic diagram illustrating the power-on or power-off state of another display device according to an embodiment of this disclosure.

[0046] In the diagram: 100-touch substrate, 1-first touch unit, 11-first sub-touch unit, 111-first segment, 112-second segment, 1101-first surface, 1102-second surface, 1103-third surface, 12-second sub-touch unit, 121-third segment, 122-fourth segment, 1201-fourth surface, 1202-fifth surface, 1203-sixth surface, 13-protrusion, 14-recession, 2-second touch unit, 21-second touch unit, 3-first touch signal line, 31-first connecting segment, 32-second connecting segment, 33-third connecting segment, 4-touch bonding part, 41-touch bonding pin, 5-second touch signal line;

[0047] 200 - display substrate, 201 - display area, 202 - non-display area, 20 - driving back plate, 21 - substrate, 22 - buffer layer; 23 - driving circuit layer, 231 - active layer, 232 - gate insulation layer, 233 - gate, 234 - interlayer insulation layer, 235 - interlayer dielectric layer, 2361 - first source, 2362 - drain, 237 - protection layer, 2381 - second source, 239 - data line; 24 - planarization layer group, 241 - first planarization layer, 242 - second planarization layer; 25 - pixel definition layer, 251 - pixel opening; 26 - pixel layer, 261 - pixel electrode, 262 - light emitting layer, 263 - common electrode; 27 - encapsulation layer, 271 - first inorganic encapsulation layer, 272 - organic encapsulation layer, 273 - second inorganic encapsulation layer; 28 - barrier dam, 281 - second barrier dam, 282 - first barrier dam; 283 - insulation layer group, 2831 - first insulation layer, 2832 - second insulation layer, 2833 - third insulation layer;

[0048] 300 - cover plate, 3001 - flat area, 3002 - bending area, 3003 - notch, 3004 - touch area, 3005 - trace area;

[0049] 400 - touch flexible circuit board, 500 - main flexible circuit board, 600 - driving chip, 700 - second adhesive layer;

[0050] 800 - first adhesive layer, 8001 - first adhesive part, 8002 - second adhesive part. DETAILED DESCRIPTION

[0051] Example embodiments now will be described more fully hereinafter with reference to the accompanying drawings. Example embodiments, however, can be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the scope of example embodiments to those skilled in the art. Like reference numerals refer to like elements throughout the specification. Additionally, the figures are not necessarily drawn to scale.

[0052] Although relative terms such as "on", "under", etc., are used herein to describe one component's relationship to another component as illustrated in the drawings, such terminology is used for convenience only and is not intended to limit the scope of example embodiments to the positions illustrated. It is to be understood that relative terms are intended to encompass different positional relationships to the other components described with respect to the drawings. In addition, if the device of the icon is turned over, the components described as "on" will become the components described as "under". When a structure is "on" another structure, it can mean that the structure is formed integrally on the other structure, or that the structure is "directly" on the other structure, or that the structure is "indirectly" on the other structure through another structure.

[0053] The terms “a,” “one,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” and “third,” etc., are used only as markers and are not a limitation on the number of objects.

[0054] With the continuous development of display technology, wearable display devices are becoming increasingly popular, such as smartwatches, smart glasses, and smart bracelets. Currently, the shapes of smart wearable display devices are often polygonal or circular. Taking smartwatches as an example, compared to square smartwatches, circular smartwatches are more comfortable for the human body to wear.

[0055] In related technologies, the design of circular smartwatches takes two forms, one of which is as follows: Figure 1 The image shown is a flat 2D smartwatch with a flat cover plate 300; another type is... Figure 2 As shown, this is a 3D smartwatch with a curved design. 3D smartwatches offer a better appearance and user experience.

[0056] Smartwatches often also have touch functionality, such as Figure 2 As shown, the touch area of ​​existing 3D smartwatches is only the flat area 3001 of the cover plate 300. The bent area 3002 of the cover plate 300 is coated with ink and has no touch or display functions. Typically, a notch 3003 is provided in the bent area 3002 of the cover plate 300 to assemble a knob, thus realizing the digital wheel function of the smartwatch. Due to the low machining precision of the notch 3003 and errors in the assembly process of the knob, the waterproof performance of wearable display devices is poor.

[0057] Based on this, the present disclosure provides a display module. For example... Figures 3 to 16 As shown, the display module includes a display substrate 200, a cover plate 300, and a touch substrate 100. The cover plate 300 includes a flat area 3001 and a bent area 3002 disposed around the flat area 3001. The bent area 3002 is close to the edge of the display substrate 200, and the flat area 3001 is close to the display surface of the display substrate 200. The flat area 3001 and the bent area 3002 intersect. The touch substrate 100 includes a first touch part 1 disposed in the bent area 3002. The first touch part 1 includes at least two adjacent first touch units. The touch command of the bent area 3002 is identified by the change in capacitance value of the two adjacent first touch units.

[0058] When the user slides the hand on the first touch part 1 of the bending area 3002, the capacitance value of the first touch unit that is first contacted continuously decreases, and the capacitance value of the first touch unit that is contacted later continuously increases in the two adjacent first touch units. The driving chip 600 can identify the touch instruction of the bending area 3002 through the capacitance value change of the two adjacent first touch units, so as to identify the sliding operation of the user, and realize the control function of the knob. Therefore, the notch 3003 for installing the knob on the cover plate 300 is not needed, and the problem of poor waterproof performance of the wearable display device is solved.

[0059] As shown in Figure 6 and Figure 7 , the cover plate 300 includes a flat part and a bending part arranged at the periphery of the flat part. The inner surface of the flat part is the flat area 3001, and the inner surface of the bending part is the bending area 3002. The bending area 3002 is arranged at the periphery of the flat area 3001, and the bending area 3002 intersects the flat area 3001. The bending area 3002 is close to the side surface of the display substrate 200, and the flat area 3001 is close to the display surface of the display substrate 200. The flat area 3001 includes a touch area 3004 and a wiring area 3005. The touch area 3004 is located in the middle, the wiring area 3005 is located at the periphery of the touch area 3004, and the bending area 3002 is located at the periphery of the wiring area 3005.

[0060] The touch substrate 100 includes a first touch part 1, a second touch part 2, and a touch binding part 4. The second touch part 2 is arranged in the touch area 3004, the first touch part 1 is arranged in the bending area 3002, the touch binding part 4 is arranged in the wiring area 3005, and the first touch part 1 at least surrounds part of the second touch part 2. The first adhesive layer 800 includes a first adhesive part 8001 and a second adhesive part 8002. The bending area 3002 of the cover plate 300 is provided with the second adhesive part 8002. The first touch part 1 is arranged on the side of the second adhesive part 8002 away from the bending area 3002, and the first touch part 1 is fixed to the bending area 3002 through the second adhesive part 8002.

[0061] The second touch part 2 is arranged on the side of the first adhesive part 8001 away from the touch area 3004. The first adhesive part 8001 is arranged on the side of the second touch part 2 away from the touch area 3004. The cover plate 300 is arranged on the side of the first adhesive part 8001 away from the touch area 3004, and the cover plate 300 is fixed to the second touch part 2 through the first adhesive part 8001. The second touch part 2 is provided with a second adhesive layer 700 on the side close to the display substrate 200, and the cover plate 300 is fixed to the second touch part 2 through the second adhesive layer 700.

[0062] As shown in Figure 4 , Figure 5 , Figure 8 and Figure 9As shown, the second touch control part 2 includes a plurality of second touch control units 21; the first touch control part 1 includes a plurality of first touch control units 11; the touch control binding part 4 includes a plurality of touch control binding pins 41. Each second touch control unit 21 is connected with one second touch control signal line, one end of the second touch control signal line is connected with the second touch control unit 21, and the other end is connected with the touch control binding pin 41. Each first touch control unit is connected with one first touch control signal line 3, one end of the first touch control signal line 3 is connected with the first touch control unit, and the other end is connected with the touch control binding pin 41.

[0063] The first touch control signal line 3 includes a first connecting segment 31, a second connecting segment 32 and a third connecting segment 33, one end of the first connecting segment 31 is connected with the first touch control unit 11, and the other end extends to be close to the symmetry axis; one end of the second connecting segment 32 is connected with the other end of the first connecting segment 31, and the other end is away from the first touch control unit 11 along the extension direction of the symmetry axis; one end of the third connecting segment 33 is connected with the other end of the second connecting segment 32, and the other end extends along the length direction of the bending area 3002 to be connected with the touch control binding pin 41.

[0064] As shown in Figure 10 and Figure 11 As shown, the display module further includes a touch control flexible circuit board 400 and a main flexible circuit board 500, the main flexible circuit board 500 is arranged on the non-display side of the display substrate 200, and the touch control flexible circuit board 400 is arranged on the side of the main flexible circuit board 500 away from the display substrate 200. The touch control flexible circuit board 400 includes a first binding part and a second binding part, the first binding part includes a plurality of first binding pins, the second binding part includes a plurality of second binding pins, the first binding pins are bound with the touch control binding pins 41, the touch control flexible circuit board 400 is bent from the touch control side of the touch control substrate 100 to the side away from the touch control side, and the main flexible circuit board 500 includes third binding pins, the third binding pins are bound with the second binding pins.

[0065] The pattern of the second touch control unit 21 is a rectangular pattern, and a plurality of second touch control units 21 are arranged in an array in the touch control area 3004. As shown in Figure 5 As shown, the plurality of second touch control signal lines 5 can extend to be connected with the touch control binding pins 41 through the gap between adjacent two second touch control units 21, or extend to be connected with the touch control binding pins 41 through the area close to the touch control area 3004 in the wiring area 3005. It can also be that part of the second touch control signal lines 5 extend to be connected with the touch control binding pins 41 through the gap between adjacent two second touch control units 21, and part of the second touch control signal lines 5 extend to be connected with the touch control binding pins 41 through the area close to the touch control area 3004 in the wiring area 3005.

[0066] As shown in Figure 11As shown, the display module can further include a touch driver chip 600 (Touch Driver IC). The touch driver chip 600 is connected with the third binding pin, and the position of the touch event occurrence is calculated by the capacitance value change of the touch substrate 100.

[0067] The touch control and the display control can be integrated into a touch and display driver integrated (Touch Display Driver IC, TDDI) as the driving chip 600. The driving control of the touch function and the display function is realized through the driving chip 600, and a separate display driving chip and a touch driving chip are not needed.

[0068] The thickness of the self-capacitance touch unit is thinner, the bending performance is better, and the manufacturing cost can be reduced. In order to save cost, the second touch part 2 can be a self-capacitance touch structure. As mentioned above, a plurality of second touch signal lines 5 are connected with each second touch unit 21. When the finger touches the second touch part 2, the capacitance of the finger will be superimposed on the second touch unit 21 at a certain position, so that the capacitance of the second touch unit 21 increases.

[0069] In the touch detection, the second touch units 21 in the horizontal direction and the vertical direction are detected in sequence, respectively. According to the change of the capacitance of the second touch unit 21 before and after the touch, the horizontal coordinate and the vertical coordinate are determined, respectively, and then combined into a planar touch coordinate. The voltage signal is sent, and then the current signal is received. After processing, the touch event is judged.

[0070] As shown in FIG. 1, the plurality of first touch units are sequentially arranged along the extension direction of the edge of the bending area 3002. The shape of the touch substrate 100 is an axisymmetric figure, and the plurality of first touch units are divided into two groups of first touch unit groups along the axis of symmetry. Figure 3 Each first touch unit group can include at least two first sub-touch units 11. In the two first sub-touch units 11 arranged adjacent to each other, the orthogonal projection of one first sub-touch unit 11 on the plane where the flat area 3001 is located and the orthogonal projection of the other first sub-touch unit 11 on the plane where the flat area 3001 is located overlap each other.

[0071]

[0072] ​The first sub touch unit 11 can include a first section 111 and a second section 112, the width of the second section 112 is smaller than the width of the first section 111, and the second section 112 is arranged at one end of the first section 111 along the length direction of the bending area 3002. In the thickness direction of the display module, the second section 112 of one of the first sub touch units 11 is arranged close to the flat area 3001, and the second section 112 of the other first sub touch unit 11 is arranged away from the area 3001, the second sections 112 of the two first sub touch units 11 overlap each other, and the first section 111 of one first sub touch unit 11 and the second section 112 of the other first sub touch unit 11 contact each other.

[0073] The connection between the second section 112 and the first section 111 can be smoothly transitioned. When the connection between the second section 112 and the first section 111 is smoothly transitioned, the width of the second section 112 can gradually increase from the end away from the first section 111 to the end close to the first section 111, and the width of the first section 111 can gradually increase from the end close to the second section 112 to the end away from the second section 112. Further, the width of the two first sub touch units 11 can gradually increase from the end close to each other to the end away from each other. When the two first sub touch units 11 are matched, the first matching surface of the two first sub touch units 11 can be a bevel, or the first matching surface of one of the first sub touch units 11 can be an inwardly recessed arc surface, and the first matching surface of the other first sub touch unit 11 can be an outwardly convex arc surface.

[0074] The connection between the second section 112 and the first section 111 can also be non-smoothly transitioned. When the connection between the second section 112 and the first section 111 is non-smoothly transitioned, the first matching surface is a stepped surface, the first matching surface includes a first surface 1101, a second surface 1102, and a third surface 1103, the first surface 1101 and the second surface 1102 are located on the second section 112, and the third surface 1103 is located on the first section 111, the first surface 1101 is parallel to the length direction of the first sub touch unit 11, and the second surface 1102 and the third surface 1103 are perpendicular to the length direction of the first sub touch unit 11.

[0075] When the two first sub touch units 11 are matched, the first surface 1101 of one first sub touch unit 11 contacts the first surface 1101 of the other first sub touch unit 11, and the second surface 1102 of one first sub touch unit 11 contacts the third surface 1103 of the other first sub touch unit 11.

[0076] In order to improve the touch sensitivity of the first touch unit 1, the variation range of the capacitance value of the first touch unit can be increased. Specifically, in the two first sub touch units 11 that contact each other, the first section 111 and the second section 112 of one first sub touch unit 11 are provided with a protrusion (a bump) 1104, and the first section 111 of the other first sub touch unit 11 is provided with a recess 1105 corresponding to the protrusion 1104. Figure 3(Not shown in the image), the first segment 111 and the second segment 112 of another first sub-touch unit 11 are provided with recesses ( Figure 3 (not shown in the image), or a first sub-touch unit 11 may have a protrusion and a recess in its first segment 111 and second segment 112, and another first sub-touch unit 11 may have a recess and a protrusion in the corresponding position of its first segment 111 and second segment 112, with the protrusion located in the recess.

[0077] It is understood that this is equivalent to a first mating surface of one first sub-touch unit 11 having a recess, and the first mating surface of another first sub-touch unit 11 having a protrusion, or a first mating surface of one first sub-touch unit 11 having both a protrusion and a recess, and the first mating surface of another first sub-touch unit 11 having both a recess and a protrusion, with the protrusion located within the recess.

[0078] like Figure 4 As shown, this disclosure provides another first touch unit assembly. (And...) Figure 3 The difference in the first touch unit group is that a second sub-touch unit 12 is provided between the two first sub-touch units 11, and the orthographic projection of the second sub-touch unit 12 on the plane where the flat area 3001 is located overlaps with the orthographic projection of the two first sub-touch units 11 on the plane where the flat area 3001 is located.

[0079] The shape and structure of the first sub-touch unit 11 are similar to Figure 3 The shape and structure of the first sub-touch unit 11 are the same, and will not be described again here. The second sub-touch unit 12 includes a third segment 121 and two fourth segments 122. The width of the fourth segment is smaller than the width of the third segment 121, and the fourth segments 122 are located at both ends of the third segment 121 along the circumference of the bending area 3002. One of the fourth segments 122 is located close to the flat area 3001, and the other fourth segment 122 is located away from the flat area 3001. The two fourth segments 122 overlap with the second segments 112 of the two first sub-touch units 11, and the fourth segments 122 are in contact with the first segments 111 of the two first sub-touch units 11.

[0080] The connection between the fourth section 122 and the third section 121 can be smoothly transitioned. When the connection between the fourth section 122 and the third section 121 is smoothly transitioned, the width of the fourth section 122 can gradually increase from the end close to the first section 111 to the end away from the first section 111, and the width of the third section 121 can gradually increase from the end close to the second section 112 to the end away from the second section 112. Further, the width of the second sub touch unit 12 can gradually increase from the end close to the first sub touch unit 11 to the end away from the first sub touch unit 11. When the second sub touch unit 12 is matched, the second matching surface of the two second sub touch units 12 can be a bevel, or one of the second matching surfaces of the first sub touch units 11 can be an inner concave arc surface, and the other second matching surface of the first sub touch units 11 can be an outer convex arc surface.

[0081] The connection between the fourth section 122 and the third section 121 can also be non-smoothly transitioned. When the connection between the fourth section 122 and the third section 121 is non-smoothly transitioned, the second matching surface is a stepped surface, and the second matching surface includes a fourth surface 1201, a fifth surface 1202, and a sixth surface 1203. The fourth surface 1201 and the fifth surface 1202 are located in the fourth section 122, and the sixth surface 1203 is located in the third section 121. The fourth surface 1201 is parallel to the extension direction of the second sub touch unit 12, and the fifth surface 1202 and the sixth surface 1203 are perpendicular to the extension direction of the second sub touch unit 12.

[0082] When the second sub touch unit 12 is matched with the first sub touch unit 11, the fourth surface 1201 of the second sub touch unit 12 is in contact with the first surface 1101 of the two first sub touch units 11, the fifth surface 1202 of the second sub touch unit 12 is in contact with the third surface 1103 of the two first sub touch units 11, and the sixth surface 1203 of the second sub touch unit 12 is in contact with the second surface 1102 of the two first sub touch units 11.

[0083] In order to improve the touch sensitivity of the first touch part 1, the change range of the capacitance value of the first touch unit 11 and the second sub touch unit 12 can be considered to be increased. For example, Figure 5As shown, the first segment 111 and the second segment 112 of the first sub touch control unit 11 are provided with protrusions 13, and the third segment 121 and the fourth segment 122 of the second sub touch control unit 12 are provided with recesses 14, that is, the mating surface of the first sub touch control unit 11 is provided with protrusions 13, the mating surface of the second sub touch control unit 12 is provided with recesses 14, and the protrusions 13 are arranged in the recesses 14. Alternatively, the first segment 111 and the second segment 112 of the first sub touch control unit 11 are provided with protrusions 13 and recesses 14, and the third segment 121 and the fourth segment 122 of the second sub touch control unit 12 are provided with recesses 14 and protrusions 13, that is, the first mating surface of the first sub touch control unit 11 is provided with protrusions 13 and recesses 14, and the second mating surface of the second sub touch control unit 12 is provided with protrusions 13 and recesses 14, and the protrusions 13 are arranged in the recesses 14.

[0084] It can be understood that the first mating surface of the two first sub touch control units 11 is provided with recesses 14, and the second mating surface of the second sub touch control unit 12 is provided with protrusions 13, or the first mating surface of the two first sub touch control units 11 is provided with protrusions 13 and recesses 14, and the second mating surface of the second sub touch control unit 12 is provided with recesses 14 and protrusions 13, and the protrusions 13 are arranged in the recesses 14.

[0085] The second sub touch control unit 12 can be two or more, and the orthographic projection of one second sub touch control unit 12 on the plane where the flat area 3001 is located and the orthographic projection of another second sub touch control unit 12 on the plane where the flat area 3001 is located overlap each other.

[0086] When the two second sub touch control units 12 cooperate with each other, in the thickness direction of the display module, the fourth segment 122 of one second sub touch control unit 12 arranged close to the flat area 3001 and the fourth segment 122 of another second sub touch control unit 12 arranged away from the flat area 3001 overlap each other, and the fourth segment 122 of one second sub touch control unit 12 and the third segment 121 of another second sub touch control unit 12 contact each other.

[0087] When the connection between the third segment 121 and the fourth segment 122 is smoothly transitioned, the second mating surface of the two second sub touch control units 12 can be an inclined surface, or the second mating surface of one second sub touch control unit 12 is an inwardly recessed arc surface, and the second mating surface of another second sub touch control unit 12 is an outwardly protruding arc surface.

[0088] When the connection between the third segment 121 and the fourth segment 122 is not smoothly transitioned, the fourth surface 1201 of one second sub touch control unit 12 and the fourth surface 1201 of another second sub touch control unit 12 contact each other, and the fifth surface 1202 of one first sub touch control unit 11 and the sixth surface 1203 of another first sub touch control unit 11 contact each other.

[0089] As Figure 5 shown, the third segment 121 and the fourth segment 122 of one of the two second sub touch units 12 in contact with each other are provided with the protrusion 13, and the third segment 121 and the fourth segment 122 of the other second sub touch unit 12 are provided with the recess 14. Alternatively, the third segment 121 and the fourth segment 122 of one of the second sub touch units 12 are provided with the protrusion 13 and the recess 14, and the third segment 121 and the fourth segment 122 of the other second sub touch unit 12 are provided with the recess 14 and the protrusion 13 at the corresponding positions, and the protrusion 13 is arranged in the recess 14.

[0090] It can be understood that the second matching surface of one of the second sub touch units 12 is provided with the recess 14, and the second matching surface of the other second sub touch unit 12 is provided with the protrusion 13 arranged in the recess 14. Alternatively, the second matching surface of one of the second sub touch units 12 is provided with the protrusion 13 and the recess 14, and the second matching surface of the other second sub touch unit 12 is provided with the recess 14 and the protrusion 13 arranged in the recess 14.

[0091] It should be noted that in the embodiment, the length of the first sub touch unit 11 is 1 / 2-2 / 3 of the length of the second sub touch unit 12. If the first sub touch unit 11 is too long relative to the second sub touch unit 12, the touch effect of the first touch unit 1 will be reduced, and if the first sub touch unit 11 is too short relative to the second sub touch unit 12, the number of the first sub touch unit 11 and the second sub touch unit 12 will be increased.

[0092] As Figure 12 shown, the display substrate 200 can generally include a substrate 21, a driving circuit layer 23, a planarization layer group 24, and a pixel layer 26. The driving circuit layer 23 is arranged on one side of the substrate 21, the planarization layer group 24 is arranged on the side of the driving circuit layer 23 away from the substrate 21, and the pixel layer 26 is arranged on the side of the planarization layer group 24 away from the substrate 21. In addition, the display substrate 200 can further include a buffer layer 22 arranged between the substrate 21 and the driving circuit layer 23.

[0093] The substrate 21 can be a substrate of inorganic material or a substrate of organic material. For example, in an embodiment of the present disclosure, the material of the substrate 21 can be a glass material such as soda-lime glass, quartz glass, sapphire glass, or a metal material such as stainless steel, aluminum, or nickel.

[0094] In another embodiment of the present disclosure, the substrate 21 can also be a flexible substrate, for example, the material of the substrate 21 can be polyimide (PI). The substrate 21 can also be a composite of multiple layers of materials, for example, in an embodiment of the present disclosure, the substrate 21 can include a Bottom Film layer, a pressure sensitive adhesive layer, a first polyimide layer and a second polyimide layer which are sequentially stacked.

[0095] In the present disclosure, the driving circuit layer 23 is provided with driving circuits for driving sub-pixels. In the driving circuit layer 23, any one driving circuit can include a transistor and a storage capacitor. Further, the transistor can be a thin film transistor which can be selected from a top-gate thin film transistor, a bottom-gate thin film transistor or a dual-gate thin film transistor; taking the top-gate thin film transistor as an example, the driving circuit layer 23 can include an active layer 231, a gate insulating layer 232, a gate electrode 233, a first source-drain metal layer, wherein:

[0096] The active layer 231 is arranged on one side of the substrate 21 and located in the display area 201. The material of the active layer 231 can be amorphous silicon semiconductor material, low-temperature polysilicon semiconductor material, metal oxide semiconductor material, organic semiconductor material or other types of semiconductor material; thus the thin film transistor can be an N-type thin film transistor or a P-type thin film transistor. The active layer 231 can include a channel region and two doped regions of different doping types located on both sides of the channel region.

[0097] The gate insulating layer 232 can cover the active layer 231 and the substrate 21, and the material of the gate insulating layer 232 is an insulating material such as silicon oxide.

[0098] The gate electrode 233 is arranged in the display area 201. The gate electrode 233 is arranged on the side of the gate insulating layer 232 away from the substrate 21 and opposite to the active layer 231, i.e. the projection of the gate electrode 233 on the substrate 21 is located within the projection range of the active layer 231 on the substrate 21, for example, the projection of the gate electrode 233 on the substrate 21 coincides with the projection of the channel region of the active layer 231 on the substrate 21.

[0099] The driving circuit layer 23 further includes an interlayer insulating layer 234 covering the gate electrode 233 and the gate insulating layer 232, and further includes an interlayer dielectric layer 235 arranged on the side of the interlayer insulating layer 234 away from the substrate 21. Both the interlayer insulating layer 234 and the interlayer dielectric layer 235 are insulating materials, but the materials of the interlayer insulating layer 234 and the interlayer dielectric layer 235 can be different.

[0100] The first source-drain metal layer is disposed on the surface of the interlayer dielectric layer 235 away from the substrate substrate 21, and includes a first source electrode 2361 and a drain electrode 2362. The first source electrode 2361 and the drain electrode 2362 are disposed in the display area 201 and are connected to the active layer 231. For example, the first source electrode 2361 and the drain electrode 2362 are respectively connected to two doped regions of the corresponding active layer 231 through vias.

[0101] A protective layer 237 is disposed on the side of the first source-drain metal layer away from the substrate substrate 21, and covers the first source-drain metal layer. A planarization layer group 24 is disposed on the side of the protective layer 237 away from the substrate substrate 21, covers the protective layer 237, and the surface of the planarization layer group 24 away from the substrate substrate 21 is planar.

[0102] Specifically, the planarization layer group 24 can include a first planarization layer 241 covering the protective layer 237. The display substrate 200 can further include a second source-drain metal layer, and a second planarization layer 242 is disposed on the side of the second source-drain metal layer away from the substrate substrate 21, covering the second source-drain metal layer and the side of the first planarization layer 241 away from the substrate substrate 21. The second source-drain metal layer includes a second source electrode 2381 connected to the first source electrode 2361 through a via.

[0103] It should be noted that the drive circuit layer 23 further includes a first lead line, which can include a data line 239 distributed in the same layer as the first source electrode 2361, the drain electrode 2362, or the second source electrode 2381 in the array substrate. It should be noted that the first lead line extends from the display area to the non-display area.

[0104] A pixel definition layer 25 and a pixel layer 26 can be disposed on the side of the planarization layer group 24 away from the substrate substrate 21, and the pixel definition layer 25 and the pixel layer 26 are located in the display area 201. The pixel definition layer 25 has a plurality of pixel openings 251, and the pixel layer 26 includes a plurality of sub-pixels, which are respectively disposed in the plurality of pixel openings 251. The plurality of sub-pixels are arrayed on the side of the drive backplane 20 away from the substrate substrate 21, and specifically, the sub-pixels can be located on the side of the planarization layer group 24 away from the substrate substrate 21. It should be noted that the sub-pixels can include red sub-pixels, green sub-pixels, and blue sub-pixels according to different light-emitting colors.

[0105] The pixel layer 26 can include a plurality of pixel electrodes 261, a light-emitting layer 262, and a common electrode 263. The pixel electrodes 261 are located on the surface of the drive backplane 20 away from the substrate substrate 21, the light-emitting layer 262 is disposed on the surface of the pixel electrode 261 away from the substrate substrate 21, and the common electrode 263 is disposed on the surface of the light-emitting layer 262 away from the substrate substrate 21.

[0106] The pixel electrode 261 is connected to the first source electrode 2361 or the second source electrode 2381. When the driving circuit layer 23 only includes the first source electrode 2361 and the first planarization layer 241, the pixel electrode 261 is connected to the first source electrode 2361 through a via hole on the first planarization layer 241, and the pixel defining layer 25 is arranged to cover the first electrode 161 and the first planarization layer 241. When the driving circuit layer 23 further includes the second source-drain metal layer and the second planarization layer 242, the pixel electrode 261 is connected to the second source electrode 2381 through a via hole on the second planarization layer 242, and the pixel defining layer 25 is arranged to cover the second source-drain metal layer and the second planarization layer 242.

[0107] The common electrode 263 can serve as a cathode, and the pixel electrode 261 can serve as an anode. The pixel electrode 261 is connected to the positive pole of a power supply, and the common electrode 263 is connected to the negative pole of the power supply. A signal can be applied through the pixel electrode 261 and the common electrode 263 to drive the light-emitting layer 262 to emit light, so as to display an image. The specific light-emitting principle is not described in detail here. The light-emitting layer 262 can include an electroluminescent material. For example, the light-emitting layer 262 can include an auxiliary layer and a light-emitting material layer which are sequentially stacked on the pixel electrode 261. Generally, a pattern area is provided on a mask plate, and an auxiliary layer of different color sub-pixels and a light-emitting layer 262 of different color sub-pixels are formed by using a process such as evaporation.

[0108] In addition, the display substrate 200 of the present disclosure can further include an encapsulation layer 27 arranged on a side of the pixel layer 26 away from the substrate 21, so as to cover the pixel layer 26 and prevent water and oxygen from corroding. The encapsulation layer 27 can be a single layer or a multi-layer structure, and the material of the encapsulation layer 27 can include organic or inorganic materials, which are not specifically limited here.

[0109] In the present embodiment, the encapsulation layer 27 can include a first inorganic encapsulation layer 271, an organic encapsulation layer 272, and a second inorganic encapsulation layer 273. The first inorganic encapsulation layer 271 is arranged on a side of the pixel layer 26 away from the substrate 21, the organic encapsulation layer 272 is arranged on a side of the first inorganic encapsulation layer 271 away from the substrate 21, and the second inorganic encapsulation layer 273 is arranged on a side of the organic encapsulation layer 272 away from the substrate 21. The second touch portion is generally arranged on a side of the second inorganic encapsulation layer 273 away from the substrate 21.

[0110] Because of the flow of liquid organic encapsulation material, the liquid organic encapsulation material is prone to overflow. In order to prevent the overflow of the organic encapsulation material, especially at the position of the lower frame, a plurality of blocking dams 28 are arranged in the non-display area 202 in sequence away from the display area 201, and the plurality of blocking dams 28 play a multiple blocking role.

[0111] Taking two barrier dams 28 as an example, the barrier dams 28 are arranged on the side of the protective layer 237 away from the substrate substrate 21, and include a first barrier dam 282 and a second barrier dam 281. The first barrier dam 282 is arranged around the display area 201. The second barrier dam 281 is arranged around the first barrier dam 282. The first barrier dam 282 and the second barrier dam 281 are provided with the encapsulation layer 27 on the side away from the substrate substrate 21.

[0112] The stack pattern of the first barrier dam 282 and the second barrier dam 281 includes an insulating layer group 283, which is arranged with one or more layers of the same material as the first planarization layer 241, the second planarization layer 242, and the pixel definition layer 25.

[0113] The stack pattern of the first barrier dam 282 and the stack pattern of the second barrier dam 281 can be the same. The stack pattern of the first barrier dam 282 and the stack pattern of the second barrier dam 281 both include a first insulating layer 2831, which is arranged with the same material as the first planarization layer 241. A second insulating layer 2832 can also be arranged on the first insulating layer 2831, which is arranged with the same material as the second planarization layer 242. A third insulating layer 2833 can also be arranged on the second insulating layer 2832, which is arranged with the same material as the pixel definition layer 25.

[0114] The stack pattern of the first barrier dam 282 and the stack pattern of the second barrier dam 281 can be different. For example, the stack pattern of the first barrier dam 282 includes a first insulating layer 2831 and a second insulating layer 2832, the first insulating layer 2831 is arranged with the same material as the first planarization layer 241, and the second insulating layer 2832 is arranged with the same material as the second planarization layer 242. The stack pattern of the second barrier dam 281 includes a first insulating layer 2831, a second insulating layer 2832, and a third insulating layer 2833, the first insulating layer 2831 is arranged with the same material as the first planarization layer 241, the second insulating layer 2832 is arranged with the same material as the second planarization layer 242, and the third insulating layer 2833 is arranged with the same material as the pixel definition layer 25.

[0115] Since the first barrier dam 282 is less than the second barrier dam 281 in the film layer pattern of the pixel definition layer 25, the height of the first barrier dam 282 relative to the substrate substrate 21 is lower than the height of the second barrier dam 281 relative to the substrate substrate 21, which makes the path of external moisture and oxygen into the display area 201 longer, increases the difficulty of entering the display area 201, and further improves the blocking ability of the barrier dam 28.

[0116] As Figure 13 and Figure 14As shown, by sliding the bending area 3002 of the cover plate 300 along the extension direction of the edge of the bending area 3002, the application program, picture, information, volume adjustment, etc. can be switched. The first touch control part 1 can be slid clockwise or counterclockwise, so that the driving chip determines the touch position by judging the change of the capacitance value, the driving chip recognizes the sliding action of the user, and reports the information of the sliding action to the Host end, so as to realize the function of switching the application program.

[0117] As shown in FIG. 1, the first touch control part 1 can be used as a fixed function key, which can replace the original volume key and power key. Figures 15 to 17 As shown in FIG. 1, the first touch control part 1 can be used as a fixed function key, which can replace the original volume key and power key.

[0118] The display device according to the embodiments of the present disclosure can include the display module according to any one of the embodiments of the present disclosure. The specific structure of the display module has been described in detail above, and thus will not be described here again.

[0119] It should be noted that, in addition to the display module, the display device also includes other necessary components and compositions. For example, for a display, specific components include a housing, a circuit board, a power cord, etc. Those skilled in the art can make corresponding supplements according to the specific use requirements of the display device, which will not be described here again.

[0120] The display device can be a conventional electronic device, such as a mobile phone, a computer, a television, and a video recording and playing device. The display device can also be an emerging wearable device, such as a virtual reality device and an augmented reality device, which will not be listed one by one here.

[0121] Other embodiments of the present disclosure will be readily apparent to those skilled in the art after considering the specification and practice of the disclosed application. The present application is intended to cover any variations, uses, or adaptive changes of the present disclosure that follow the general principles of the present disclosure and include common knowledge or conventional technical means in the art that are not disclosed by the present disclosure. The specification and examples are only considered as exemplary, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A display module, characterized by The display module comprises: a display substrate; a cover plate comprising a flat area and a bending area arranged at the periphery of the flat area, the bending area being close to the edge of the display substrate, the flat area being close to the display surface of the display substrate, and the flat area intersecting with the bending area; a touch substrate comprising a first touch part, the first touch part being arranged at the bending area, the first touch part comprising at least two first touch units arranged adjacently, and the touch instruction of the bending area being recognized by the change of the capacitance value of the two first touch units arranged adjacently; the first touch unit group comprises at least two first sub-touch units, the first sub-touch unit comprising a first segment and a second segment, the second segment being arranged at one end of the first segment along the length direction of the bending area, the connection between the second segment and the first segment being non-smooth transition, the first matching surface of the two first sub-touch units being a stepped surface, the first matching surface comprising a first surface, a second surface and a third surface, the first surface and the second surface being located at the second segment, and the third surface being located at the first segment, the first surface being parallel to the length direction of the first sub-touch unit, the second surface and the third surface being perpendicular to the length direction of the first sub-touch unit, the first surface of one first sub-touch unit being in contact with the first surface of another first sub-touch unit, and the second surface of one first sub-touch unit being in contact with the third surface of another first sub-touch unit.

2. The display module of claim 1, wherein, A plurality of first touch units are arranged in sequence along the extension direction of the edge of the bending area, the shape of the touch substrate is an axisymmetric figure, and the plurality of first touch units are divided into two first touch unit groups along the axis of symmetry.

3. The display module of claim 2, wherein, In the two first sub-touch units arranged adjacently, the orthogonal projection of one first sub-touch unit on the plane where the flat area is located and the orthogonal projection of another first sub-touch unit on the plane where the flat area is located are overlapped with each other.

4. The display module of claim 3, wherein, In the thickness direction of the display module, the width of the second segment is smaller than the width of the first segment, the second segment of one first sub-touch unit is arranged close to the flat area, the second segment of another first sub-touch unit is arranged away from the flat area, the second segments of the two first sub-touch units are overlapped with each other, and the first segment of one first sub-touch unit is in contact with the second segment of another first sub-touch unit.

5. The display module of claim 2, wherein, The first touch unit group comprises at least one second sub-touch unit, the second sub-touch unit being arranged between the two first sub-touch units, and the orthogonal projection of the second sub-touch unit on the plane where the flat area is located and the orthogonal projection of the two first sub-touch units on the plane where the flat area is located are overlapped with each other.

6. The display module of claim 5, wherein, In the thickness direction of the display module, the width of the second segment is smaller than the width of the first segment, the second segment is arranged at one end of the first segment along the length direction of the bending area, the second segment of one first sub-touch unit is arranged close to the flat area, and the second segment of another first sub-touch unit is arranged away from the flat area. The second sub touch control unit comprises a third segment and two fourth segments, the width of the fourth segment is smaller than the width of the third segment in the thickness direction of the display module, and the fourth segment is located at both ends of the third segment along the length direction of the bending area, one of the fourth segments is arranged close to the flat area, and the other fourth segment is arranged away from the flat area, the two fourth segments are overlapped with the second segments of the two first sub touch control units respectively, and the two fourth segments are in contact with the first segments of the two first sub touch control units respectively.

7. The display module of claim 6, wherein, The first segment and the second segment of the first sub touch control unit are provided with protrusions and / or recesses, the third segment and the fourth segment of the second sub touch control unit are provided with recesses and / or protrusions, and the protrusions are arranged in the recesses.

8. The display module of claim 6, wherein, The second sub touch control unit is provided as two or more, the orthographic projection of one of the second sub touch control units on the plane of the flat area is overlapped with the orthographic projection of the other second sub touch control unit on the plane of the flat area.

9. The display module of claim 8, wherein, In the thickness direction of the display module, the fourth segment of one of the second sub touch control units arranged close to the flat area is overlapped with the fourth segment of the other second sub touch control unit arranged away from the flat area, and the fourth segment of one of the second sub touch control units is in contact with the third segment of the other second sub touch control unit.

10. The display module of claim 9, wherein, In the two second sub touch control units in contact with each other, the third segment and the fourth segment of one of the second sub touch control units are provided with protrusions and / or recesses, and the third segment and the fourth segment of the other first sub touch control unit are provided with recesses and / or protrusions, and the protrusions are arranged in the recesses.

11. The display module of claim 6, wherein, The connection between the second segment and the first segment is smoothly transitioned, the connection between the fourth segment and the third segment is smoothly transitioned, the first matching surface of the first sub touch control unit is an outer convex arc surface, and the second matching surface of the second sub touch control unit is an inner concave arc surface matched with the outer convex arc surface.

12. The display module of claim 6, wherein, The connection between the second segment and the first segment is not smoothly transitioned, the connection between the fourth segment and the third segment is not smoothly transitioned, the first matching surface of the first sub touch control unit is a stepped surface, and the second matching surface of the second sub touch control unit is a stepped surface. The first matching surface comprises a first surface, a second surface and a third surface, the first surface and the second surface are located on the second segment, the third surface is located on the first segment, the first surface is parallel to the length direction of the first sub touch control unit, and the second surface and the third surface are perpendicular to the length direction of the first sub touch control unit. The second matching surface comprises a fourth surface, a fifth surface and a sixth surface, the fourth surface and the fifth surface are located on the fourth segment, the sixth surface is located on the third segment, the fourth surface is parallel to the length direction of the second sub touch control unit, and the fifth surface and the sixth surface are perpendicular to the length direction of the second sub touch control unit. Two fourth sides of the second sub touch unit are in contact with the first sides of the two first sub touch units respectively, two fifth sides of the second sub touch unit are in contact with the third sides of the two first sub touch units respectively, and two sixth sides of the second sub touch unit are in contact with the second sides of the two first sub touch units respectively.

13. The display module of claim 5, wherein, The length of the first sub touch unit is 1 / 2-2 / 3 of the length of the second sub touch unit.

14. The display module of claim 2, wherein, The flat area comprises a wiring area, the wiring area is adjacent to the bending area, and the touch substrate further comprises: A touch binding part is arranged in the wiring area, and the binding part comprises a plurality of touch binding pins; A plurality of first touch signal lines are arranged in the wiring area, one end of the first touch signal line is connected to the first touch unit, and the other end is connected to the touch binding pin.

15. The display module of claim 14, wherein, The first touch signal line comprises: A first connecting segment, one end of which is connected to the first touch unit, and the other end extends close to the symmetry axis; A second connecting segment, one end of which is connected to the other end of the first connecting segment, and the other end is away from the first touch unit along the extension direction of the symmetry axis; A third connecting segment, one end of which is connected to the other end of the second connecting segment, and the other end extends along the length direction of the bending area to be connected to the touch binding pin.

16. The display module of claim 14, wherein, The flat area further comprises a touch area, and the touch substrate further comprises: A second touch part is arranged in the touch area, one side of the second touch part is connected to the display substrate, and the side away from the display substrate is connected to the touch area, the second touch part comprises a plurality of second touch units; A second touch signal line extends to be connected to the touch binding pin through the gap between the second touch units and / or the area between the first touch signal line and the touch area in the wiring area.

17. The display module of claim 16, wherein, The first touch part at least surrounds part of the second touch part.

18. The display module of claim 14, wherein, The display module further comprises: A touch flexible circuit board comprises a first binding part and a second binding part, the first binding part comprises a plurality of first binding pins, the second binding part comprises a plurality of second binding pins, the first binding pin is bound with the touch binding pin, and the touch flexible circuit board is folded from the touch surface of the touch substrate to the side away from the touch surface; A main flexible circuit board is arranged on the non-display surface of the display substrate, and the main flexible circuit board comprises a third binding pin, and the third binding pin is bound with the second binding pin.

19. A display device comprising: The display module comprises any one of claims 1-18. The display module comprises any one of claims 1-18.

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