Display module bending method, bending device, and display module

Abstract

An embodiment of the present invention discloses a bending method, a bending device, and a display module for a display module, wherein a driving module of the bending device drives multiple telescopic adsorption units of a telescopic adsorption module to perform multi-point adsorption on the area to be bent of the display module; the driving module controls the telescopic distance of each telescopic adsorption unit, and achieves a state in which the telescopic adsorption units gradually recede in the retraction direction of the telescopic adsorption units from the telescopic adsorption units on both sides to the middle telescopic adsorption unit along a first direction; thereby, the area to be bent of the display module can form a shape that matches the contour of one end of the adsorption of each telescopic adsorption unit to the display module, thereby improving the performance of the bending zone.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of display technology, and more particularly to a bending method, a bending device, and a display module. Background Art

[0002] At present, flexible displays have become the development direction of display devices.

[0003] Due to the display device's requirements for screen-to-body ratio and narrow bezel, the flexible substrate of the display device needs to be bent, and the driver chip and some leads of the display device need to be bent to the back of the light-emitting surface of the display screen.

[0004] However, due to the irregular shape of the bending area of ​​the module, the metal wire in the bending area is easily broken under external influences. Summary of the Invention

[0005] The present invention provides a display module bending method, a bending device and a display module, so as to ensure that the bending shape of the display module is smoother, reduce the risk of metal wire breakage in the bending area, and ensure a good bending effect.

[0006] In a first aspect, an embodiment of the present invention provides a method for bending a display module, comprising:

[0007] The display module is bent by a bending device, the bending device including a telescopic adsorption module and a driving module, the telescopic adsorption module including at least one column of telescopic adsorption units, each column of telescopic adsorption units including a plurality of telescopic adsorption units, each telescopic adsorption unit in each column being arranged along a first direction, the first direction being perpendicular to the telescopic direction of the telescopic adsorption unit; the display module including a first non-bending area, a second non-bending area, and an area to be bent between the first non-bending area and the second non-bending area; the bending method of the display module including:

[0008] Bending the display module to achieve a target bending state in which the first non-bending region and the second non-bending region are parallel; wherein, in the target bending state, the first direction is perpendicular to the plane of the first non-bending region;

[0009] The driving module controls each telescopic adsorption unit to perform multi-point adsorption on the area to be bent of the display module, and controls the telescopic distance of each telescopic adsorption unit, so as to achieve a state in which the telescopic adsorption units gradually recede in the retraction direction from the telescopic adsorption units on both sides to the middle telescopic adsorption unit along the first direction.

[0010] Optionally, bending the display module and making the display module reach a target bending state in which the first non-bending region and the second non-bending region are parallel to each other includes:

[0011] When the area to be bent of the display module is in a flattened state, the driving module drives the telescopic adsorption units located in the middle row of the telescopic adsorption module to adsorb the area to be bent of the display module; wherein, when the area to be bent of the display module is in a flattened state, the first direction is parallel to a line connecting the first non-bending area and the area to be bent; and the row direction in which the telescopic adsorption units are arranged intersects with the first direction;

[0012] The display module is bent in the area to be bent, and after reaching the target bending state, the area to be bent is adsorbed at multiple points by other telescopic adsorption units of the telescopic adsorption module;

[0013] Alternatively, the display module is bent in the area to be bent, and after reaching the target bending state, the area to be bent is subjected to multi-point adsorption by each of the telescopic adsorption units of the telescopic adsorption module;

[0014] Optionally, bending the to-be-bent area of ​​the display module to achieve a target bending state includes:

[0015] When the display module is in a completely flat state, the second non-bending area of ​​the display module is fixed, and the bending driving device drives the area to be bent and the first non-bending area to rotate, so that the display surface located in the first non-bending area gradually moves away from the second non-bending area to reach the target bending state.

[0016] Optionally, along the first direction, when the telescopic adsorption units gradually become concave in the retraction direction of the telescopic adsorption units from the two side telescopic adsorption units to the middle telescopic adsorption unit, in each column of telescopic adsorption units, the lines connecting the adsorption points of the telescopic adsorption units and the display module are symmetrical about a perpendicular bisector of the lines connecting the adsorption points of the two outermost telescopic adsorption units and the display module, and the perpendicular bisector is a perpendicular bisector extending in the retraction direction;

[0017] Optionally, when the telescopic adsorption units gradually become concave in the retracting direction of the telescopic adsorption units from the two sides to the middle telescopic adsorption unit, the outline of the adsorption point between each telescopic adsorption unit and the display module is an arc;

[0018] Optionally, when the telescopic adsorption units from the two sides to the middle telescopic adsorption unit are gradually recessed in the retracting direction of the telescopic adsorption units, the outlines of the adsorption points of each telescopic adsorption unit and the display module are arcs with equal radius.

[0019] Optionally, when the telescopic adsorption module includes a row of telescopic adsorption units, the telescopic adsorption units are adsorbed on a line passing through the center of the area to be bent;

[0020] When the optional telescopic adsorption module includes m rows of telescopic adsorption units, where m is an odd number greater than 2, the (m+1) / 2th row of telescopic adsorption units is adsorbed on a line passing through the center of the area to be bent;

[0021] When the optional telescopic adsorption module includes n columns of telescopic adsorption units, where n is an even number greater than or equal to 2, n / 2 columns of telescopic adsorption units are adsorbed on a first side of a line passing through the center of the region to be bent, and another n / 2 columns of telescopic adsorption units are adsorbed on a second side of the line passing through the center of the region to be bent, such that the n / 2 columns of telescopic adsorption units and the another n / 2 columns of telescopic adsorption units are symmetrical about the line passing through the center of the region to be bent;

[0022] Optionally, before bending the display module, the method further includes:

[0023] When the display module is in a completely flat state, coating the limiting structure material on the area to be bent;

[0024] After the display module is bent, the material of the limiting structure forms the limiting structure, the area to be bent forms a bending area, and the limiting structure is located inside the bending area.

[0025] In a second aspect, an embodiment of the present invention further provides a bending device for a display module, comprising: a control module, a driving module, and a telescopic adsorption module; the control module is connected to the driving module, and the driving module is connected to the telescopic adsorption module;

[0026] The telescopic adsorption module includes at least one column of telescopic adsorption units, each column of telescopic adsorption units includes multiple telescopic adsorption units, and in each column of telescopic adsorption units, each telescopic adsorption unit is arranged along a first direction, and the first direction is perpendicular to the telescopic direction of the telescopic adsorption unit; the display module is bent, and the display module reaches a target bending state in which the first non-bending area and the second non-bending area are parallel; the area to be bent is located between the first non-bending area and the second non-bending area; wherein, in the target bending state, the first direction is perpendicular to the plane where the first non-bending area is located; the control module is used to control the telescopic distance of each telescopic adsorption unit through the driving module, and reach a state in which the telescopic adsorption units on both sides to the middle telescopic adsorption unit are gradually recessed toward the retraction direction of the telescopic adsorption unit along the first direction.

[0027] Optionally, the telescopic adsorption module includes at least two columns of telescopic adsorption units, and each column of telescopic adsorption units is arranged along a second direction, wherein the second direction is perpendicular to the first direction and the retraction direction;

[0028] Optionally, the telescopic adsorption module includes m columns of telescopic adsorption units, wherein m is an odd number greater than 2, and the columns of telescopic adsorption units on both sides of the (m+1) / 2th column of telescopic adsorption units are symmetrical about a straight line where the (m+1) / 2th column of telescopic adsorption units is located;

[0029] Optionally, the telescopic adsorption module includes n columns of telescopic adsorption units, where n is an even number greater than or equal to 2, and the i-th column of telescopic adsorption units and the n-i+1-th column of telescopic adsorption units along the second direction are symmetrical about the perpendicular bisector of the line connecting the two, where i is greater than or equal to 1 and less than or equal to n / 2.

[0030] Optionally, the driving module includes an air pump and a cylinder corresponding to each of the telescopic adsorption units, wherein the cylinder includes a cylinder body and a piston in the cylinder body;

[0031] The telescopic adsorption unit is fixedly connected to the piston in the corresponding cylinder;

[0032] The air pump is connected to the cylinder body, and the control module includes an air pump control unit. The air pump control unit is used to control the telescopic adsorption unit to extend or retract by inputting gas into the cylinder body and / or sucking gas out of the cylinder body through the air pump.

[0033] Optionally, the driving module further includes a first air pipe corresponding to the cylinder body on a one-to-one basis, and a second air pipe corresponding to the cylinder body on a one-to-one basis.

[0034] The cylinder body includes a top surface, a bottom surface, and a side wall connecting the top surface and the bottom surface;

[0035] The top surface is provided with a first air pipe hole, and the air pump is connected to the first air pipe hole through the first air pipe; the bottom surface is provided with a second air pipe hole, and the air pump is connected to the second air pipe hole through the second air pipe.

[0036] Optionally, the driving module further includes a main air pipe, the main air pipe connecting the air pump and each first air pipe, and connecting the air pump and each second air pipe;

[0037] A first control valve is provided in the pipeline of the first air pipe, and a second control valve is provided in the pipeline of the second air pipe;

[0038] The control module further includes a valve control unit, which is used to control the on / off states of the first control valve and the second control valve;

[0039] Optionally, the valve control unit is further configured to control the opening degree of the first control valve to control the ventilation volume of the first trachea per unit time, and to control the opening degree of the second control valve to control the ventilation volume of the second trachea per unit time.

[0040] Optionally, the telescopic adsorption unit includes a telescopic gas rod and a vacuum suction cup, one end of the telescopic gas rod is connected to the corresponding piston, and the second end of the telescopic gas rod is connected to the vacuum suction cup, and the vacuum suction cup serves as the second end of the telescopic adsorption unit;

[0041] The driving module also includes a plurality of third air pipes, which are connected to the telescopic air rods one by one. The air pump control unit is also used to suck out the air inside the vacuum suction cup through the air pump when the display module is adsorbed.

[0042] In a third aspect, an embodiment of the present invention further provides a display module, which is bent using the bending method of the first aspect to obtain a bent display module;

[0043] Optionally, the bent display module includes a first non-bending area, a second non-bending area, and a bending area between the first non-bending area and the second non-bending area; the display module further includes a limiting structure, and the limiting structure is located inside the bending area;

[0044] Optionally, the display module also includes a first support film and a second support film, the first support film is located in the first non-bending area, the second support film is located in the second non-bending area, the first support film and the second support film are arranged opposite to each other, and the limiting structure is in contact with the first support film and the second support film.

[0045] The bending method, bending device, and display module of the display module of the embodiments of the present invention drive the multiple telescopic adsorption units of the telescopic adsorption module through the driving module of the bending device to perform multi-point adsorption on the area to be bent of the display module; the telescopic distance of each telescopic adsorption unit is controlled by the driving module to achieve a state in which the telescopic adsorption units gradually recess in the retraction direction of the telescopic adsorption units from the telescopic adsorption units on both sides to the middle telescopic adsorption unit along the first direction; so that the area to be bent of the display module can form a shape that matches the contour of one end of the adsorption of each telescopic adsorption unit to the display module, making the bending shape of the area to be bent of the display module smoother and improving the performance of the bending zone. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 1 is a schematic structural diagram of a bending device for a display module provided by an embodiment of the present invention;

[0047] Figure 2 is a schematic diagram of a display panel provided by an embodiment of the present invention in a flattened state,

[0048] Figure 3 is a planar structural diagram of a driving module provided by an embodiment of the present invention;

[0049] Figure 4 is a structural schematic diagram of another bending device of a display module provided by an embodiment of the present invention;

[0050] Figure 5 is a schematic structural diagram of another display panel bending device provided by an embodiment of the present invention;

[0051] Figure 6 is a structural schematic diagram of another bending device of a display module provided by an embodiment of the present invention;

[0052] Figure 7This is a flow chart of a method for bending a display module provided by an embodiment of the present invention;

[0053] Figure 8 is a schematic diagram of bending a display module using a bending device for a display module according to an embodiment of the present invention;

[0054] Figure 9 is a flow chart of another display module bending method provided by an embodiment of the present invention;

[0055] Figure 10 It is a structural schematic diagram of a display module provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0056] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0057] As described in the background, the irregular shape of the module's bending zone can easily cause the metal wire in this area to break under external forces. The inventors discovered that this problem arises because the irregular shape of the bending zone causes stress concentration in the bending zone when subjected to external forces, making the metal wire easily break during the bending process.

[0058] Based on the above reasons, an embodiment of the present invention provides a bending device for a display module. Figure 1 1 is a schematic structural diagram of a bending device for a display module provided by an embodiment of the present invention. The bending device can assist in bending a to-be-bent region of the display module during the bending process of the display module. Figure 2 is a schematic diagram of a display panel provided by an embodiment of the present invention in a flattened state, with reference to Figure 2 , the display module includes a first non-bending area 10, a second non-bending area 20 and a to-be-bent area 30 between the first non-bending area 10 and the second non-bending area 20. Figure 1The bending device of the display module includes: a control module 110, a driving module 120 and a telescopic adsorption module 130; the control module 110 is connected to the driving module 120, and the driving module 120 is connected to the telescopic adsorption module 130; the telescopic adsorption module 130 includes at least one column of telescopic adsorption units 131, each column of telescopic adsorption units includes a plurality of telescopic adsorption units 131, and in each column of telescopic adsorption units 131, the plurality of telescopic adsorption units 131 are arranged along a first direction x, and the first direction x is in the direction of extension of the telescopic adsorption unit. y perpendicular; bend the display module, and make the display module reach a target bending state in which the first non-bending area 10 and the second non-bending area 20 are parallel; wherein, in the target bending state, the first direction x is perpendicular to the plane where the first non-bending area 10 is located; the control module 110 is used to control the telescopic distance of each telescopic adsorption unit 131 through the driving module 120, and reach a state in which the telescopic adsorption units 131 on both sides gradually recede toward the retraction direction y of the telescopic adsorption units 131 along the first direction x, from the telescopic adsorption units 131 in the middle.

[0059] Specifically, the control module 110 is used to drive multiple telescopic adsorption units 131 to perform multi-point adsorption on the area to be bent of the display module through the driving module 120. The control module 110 can be used to control the action of the driving module 120, so that the driving module 120 can control the action of the telescopic adsorption unit 131 of the telescopic adsorption module 130, specifically, it can drive the telescopic adsorption unit 131 to extend or retract. The control module 110 can control the extension distance or retraction distance of the telescopic adsorption unit 131 by controlling the driving module 120.

[0060] Among them, the display module in this embodiment can be a flexible display module. Before leaving the factory, the display module needs to be bent. Before the bending is completed, the area of ​​the display module that needs to be bent serves as the area to be folded outward. After the bending is completed, the area to be bent serves as the bending area of ​​the display module.

[0061] When the display module is bent, the initial state of the display module is a completely flat state. In the completely flat state, the flexible substrate of the display module does not bend. When the area to be bent is in a flat state, the control module 110 can control the driving module 120 so that the driving module 120 drives some of the telescopic adsorption units 131 to perform multi-point adsorption on the area to be bent. For example, the telescopic adsorption units 131 in the middle row can be driven to perform multi-point adsorption on the area to be bent 30; and when the target bending state signal is reached, the other telescopic adsorption units are driven to adsorb the area to be bent 30. In other optional embodiments of the present invention, after the display module is bent to the target bending state, each telescopic adsorption unit 131 can be driven to adsorb the area to be bent 30 together. The adsorption can be by vacuum adsorption, viscous adsorption, or other adsorption methods, which are not specifically limited in this embodiment.

[0062] After or during adsorption, the control module 110 controls the driving module 120 to control the telescopic distance of each telescopic adsorption unit 131, so that the telescopic adsorption module 130 reaches a state in which the telescopic adsorption units 131 on both sides gradually retract in the retraction direction of the telescopic adsorption unit 131 from the telescopic adsorption units 131 in the middle along the first direction x. Figure 1The drive device shown retracts to the left; the first direction x is perpendicular to the retraction direction, and the first direction x is also perpendicular to the extension direction of the telescopic suction unit 131, with the retraction direction and the extension direction being opposite. Specifically, the retraction distance can be gradually increased from the telescopic suction units 131 on both sides to the telescopic suction units 131 in the middle. When the telescopic suction module 130 begins to absorb the display module, the initial state in which the ends of the telescopic suction units 131 are flush with the display module is achieved, and then the telescopic suction units 131 on both sides gradually become concave in the retraction direction of the telescopic suction units 131 to the telescopic suction units 131 in the middle. Among them, in the first direction x, the telescopic adsorption units 131 on both sides to the middle telescopic adsorption unit 131 are gradually recessed in the retracting direction of the telescopic adsorption unit 131, which may mean that in the first direction x, for any two telescopic adsorption units 131 from the outermost telescopic adsorption unit 131 to the middle telescopic adsorption unit 131, the telescopic adsorption unit 131 close to the outermost telescopic adsorption unit 131 protrudes in the extending direction of the telescopic adsorption unit 131 relative to the telescopic adsorption unit 131 far from the outermost telescopic adsorption unit 131. The control module 110 controls the driving module 120 to control the telescopic distance of each telescopic adsorption unit 131, so that the telescopic adsorption unit 130 reaches a state where the telescopic adsorption units 131 gradually recess in the retraction direction of the telescopic adsorption units 131 along the first direction x, from the telescopic adsorption units 131 on both sides to the middle telescopic adsorption unit 131. Due to the adsorption effect of the telescopic adsorption units 131, the to-bend region of the display module can form a shape that matches the contour of the end of each telescopic adsorption unit 131 adsorbed to the display module. Because the display module in the to-bend region is a flexible structure (for example, a flexible substrate, which may include a flexible substrate and metal wires on one side of the flexible substrate, and protective glue on the side of the metal wires away from the substrate), when the telescopic adsorption units 131 gradually recess in the retraction direction of the telescopic adsorption units 131 along the first direction x, the bending shape of the to-bend region of the display module is relatively smooth, improving the performance of the bending zone and reducing the risk of wire breakage after bending.

[0063] In the bending device of the display module of this embodiment, the control module drives the multiple telescopic adsorption units of the telescopic adsorption module through the driving module to perform multi-point adsorption on the area to be bent of the display module. After adsorption, the driving module controls the telescopic distance of each telescopic adsorption unit to achieve a state in which the telescopic adsorption units gradually recess in the retraction direction of the telescopic adsorption units along a first direction, from the telescopic adsorption units on both sides to the telescopic adsorption unit in the middle. This allows the area to be bent of the display module to form a shape that matches the contour of the end of each telescopic adsorption unit adsorbed on the display module, making the bending shape of the area to be bent of the display module smoother and improving the performance of the bending zone.

[0064] Figure 3 This is a planar structural diagram of a driving module provided by an embodiment of the present invention, with reference to Figure 3 Based on the above technical solution, the telescopic adsorption module 130 optionally includes at least two columns of telescopic adsorption units 131. Each column of telescopic adsorption units 131 is arranged along a second direction z, wherein the second direction z is perpendicular to both the first direction x and the retraction direction. Specifically, the telescopic adsorption units 131 are arranged in an array, with the second direction z being the row direction of the telescopic adsorption units 131.

[0065] In some optional embodiments of the present invention, the telescopic adsorption module 130 includes m rows of telescopic adsorption units 131, where m is an odd number greater than 2, and the rows of telescopic adsorption units 131 on either side of the (m+1) / 2th row of telescopic adsorption units 131 are symmetrical about the line containing the (m+1) / 2th row of telescopic adsorption units 131. In this case, when adsorbing the region to be bent, the (m+1) / 2th row of telescopic adsorption units can be attached to a line passing through the center of the region to be bent. This ensures that the force applied to the region to be bent is uniform and symmetrical during adsorption, preventing deformation of the region due to uneven force, ensuring a smooth and symmetrical bend, and reducing line breakage.

[0066] In another optional embodiment of the present invention, the telescopic adsorption module 130 includes n columns of telescopic adsorption units 131, where n is an even number greater than or equal to 2, and the i-th column of telescopic adsorption units 131 and the n-i+1-th column of telescopic adsorption units 131 along the second direction z are symmetrical about the perpendicular bisector of the line connecting the two, where i is greater than or equal to 1 and less than or equal to n / 2. In this case, when adsorbing the region to be bent, n / 2 columns of telescopic adsorption units 131 can be adsorbed to a first side of a line passing through the center of the region to be bent, and another n / 2 columns of telescopic adsorption units can be adsorbed to a second side of a line passing through the center of the region to be bent, so that the n / 2 columns of telescopic adsorption units and the other n / 2 columns of telescopic adsorption units are symmetrical about the line passing through the center of the region to be bent. This ensures that the force applied to the region to be bent is uniform and symmetrical during adsorption, prevents deformation of the region to be bent due to uneven force, ensures a smooth and symmetrical bending shape, and reduces wire breakage.

[0067] In another optional embodiment of the present invention, the telescopic adsorption module 130 includes a row of telescopic adsorption units 131. In this case, the telescopic adsorption units can be adsorbed on a line passing through the center of the area to be bent. This ensures that when the telescopic adsorption module 130 includes a row of telescopic adsorption units 131, the area to be bent will not deform due to uneven force when the telescopic adsorption units 131 adsorb on a line passing through the center of the area to be bent, thereby ensuring a smooth and symmetrical bend and reducing line breakage.

[0068] Figure 4is a schematic structural diagram of another bending device of a display module provided by an embodiment of the present invention, referring to Figure 4 Optionally, the driving module 120 includes an air pump 121 and a cylinder 122 corresponding to the telescopic adsorption unit 131, the cylinder 122 includes a cylinder body 1220 and a piston 1221 in the cylinder body 1220; the telescopic adsorption unit 131 is fixedly connected to the piston 1221 in the corresponding cylinder 122; the air pump 121 is communicated with the cylinder body 1220, and the control module 110 includes an air pump control unit 111, which is used to input gas into the cylinder body 1220 and / or suck out gas from the cylinder body 1220 through the air pump 121 to control the telescopic adsorption unit 131 to extend or retract.

[0069] Specifically, the air pump control unit 111 can input gas to the cylinder 1220 through the air pump 121, and can also suck gas out of the cylinder 1220 through the air pump 121, thereby controlling the extension or retraction of the telescopic adsorption unit 131. Exemplarily, the cylinder 1220 may include a first sub-cylinder and a second sub-cylinder on both sides of the piston 1221. When the piston 1221 moves, the first sub-cylinder ( Figure 4 The left side of the middle piston) and the second sub-cylinder ( Figure 4 The volume of the piston on the right side changes. Figure 4 Taking the illustrated situation as an example, the telescopic adsorption unit 131 can be extended by the air pump 121 by delivering air to the first sub-cylinder or drawing air from the second sub-cylinder; and the telescopic adsorption unit 131 can be retracted by delivering air to the second sub-cylinder or drawing air from the first sub-cylinder. By controlling the amount of air flow to the cylinders 1220 connected to different telescopic adsorption units 131, the telescopic adsorption units 131 can be extended to different distances, thereby achieving a state in which the telescopic adsorption units 131 gradually recede in the direction of retraction along the first direction x, from the telescopic adsorption units 131 on both sides to the central telescopic adsorption unit 131.

[0070] Specifically, the surface of the cylinder body 1220 can be provided with a through hole for the telescopic adsorption unit 131 to retract and extend, so that the second end of the telescopic adsorption unit 131 is outside the cylinder 122 when adsorbing the display module, and can contact the display module through the second end of the telescopic adsorption unit 131, and adsorption of the display module can be achieved through the second end of the telescopic adsorption unit 131.

[0071] It should be noted that the provision of the through holes on the surface of the cylinder 1220 for the telescopic adsorption unit 131 to retract and extend needs to meet the airtightness requirement of the cylinder 1220 when the telescopic adsorption unit 131 passes through the through holes.

[0072] Continue to refer Figure 4Optionally, the driving module 120 further includes a first air pipe 123 corresponding to the cylinder body 1220 and a second air pipe 124 corresponding to the cylinder body 1220. The cylinder body 1220 includes a top surface, a bottom surface, and a side wall connecting the top surface and the bottom surface.

[0073] A first air pipe hole is provided on the top surface, and the air pump 121 is connected to the first air pipe hole through a first air pipe 123 ; a second air pipe hole is provided on the bottom surface, and the air pump 121 is connected to the second air pipe hole through a second air pipe 124 .

[0074] Specifically, the air pump 121 can output gas to the first sub-cylinder through the first air pipe 123, or suck gas from the first sub-cylinder; the air pump 121 can output gas to the second sub-cylinder through the second air pipe 124, or suck gas from the second sub-cylinder.

[0075] It should be noted that the arrangement of the first air pipe hole and the second air pipe hole on the cylinder body 1220 needs to ensure airtightness after the first air pipe 123 is inserted into the first air pipe hole and the second air pipe 124 is inserted into the second air pipe hole.

[0076] In other optional embodiments of the present invention, the first air pipe 123 is connected to the first sub-cylinder, and the second air pipe 124 is connected to the second sub-cylinder.

[0077] Continue to refer Figure 4 Optionally, the driving module 120 also includes a main air pipe 125, which connects the air pump 121 and each first air pipe 123, and connects the air pump 121 and each second air pipe 124; a first control valve 126 is provided in the pipeline of the first air pipe 123, and a second control valve 127 is provided in the pipeline of the second air pipe 124; the control module 110 also includes a valve control unit 112, which is used to control the switching status of the first control valve 126 and the second control valve 127.

[0078] Optionally, the first control valve 126 and the second control valve 127 may be solenoid valves or flow valves. By disposing the first control valve 126 in the first air pipe 123 and controlling the on / off state of the first control valve 126 by the valve control unit 112, independent control of the ventilation state in the first air pipe 123 connected to different cylinders 122 can be achieved. When the first control valve 126 in the first air pipe 123 is open, the air pump 121 communicates with the corresponding cylinder 1220 through the first air pipe 123, thereby controlling the extension or retraction of the cylinder 122 connected to the piston 1221 in the cylinder 1220.

[0079] By disposing a second control valve 127 in the second air pipe 124 and controlling the on / off state of the second control valve 127 by the valve control unit 112, the ventilation state in the second air pipe 124 connected to different cylinders 122 can be independently controlled. When the second control valve 127 in the second air pipe 124 is open, the air pump 121 communicates with the corresponding cylinder 1220 through the second air pipe 124, thereby controlling the extension or retraction of the cylinder 122 connected to the piston 1221 in the cylinder 1220.

[0080] Optionally, the valve control unit 112 is further configured to control the opening degree of the first control valve 126 to control the ventilation volume of the first air pipe 123 per unit time and to control the opening degree of the second control valve 127 to control the ventilation volume of the second air pipe 124 per unit time.

[0081] Specifically, by controlling the opening degree of the first control valve 126 by the valve control unit 112 to control the ventilation volume of the first air pipe 123 per unit time, and controlling the opening degree of the second control valve 127 to control the ventilation volume of the second air pipe 124 per unit time, more accurate control of the telescopic distance of the telescopic adsorption unit 131 can be achieved, thereby achieving precise control of the shape of the area to be bent of the display module.

[0082] Figure 5 is a schematic structural diagram of another display panel bending device provided by an embodiment of the present invention, referring to Figure 5 Optionally, the telescopic adsorption unit 131 includes a telescopic gas rod 1311 and a vacuum suction cup 1312, one end of the telescopic gas rod 1311 is connected to the corresponding piston 1221, and the second end of the telescopic gas rod 1311 is connected to the vacuum suction cup 1312, and the vacuum suction cup 1312 serves as the second end of the telescopic adsorption unit 131; the driving module 120 also includes a plurality of third air pipes 128, and the third air pipes 128 are connected to the telescopic gas rod 1311 in a one-to-one correspondence. The air pump control unit 111 is also used to suck out the air inside the vacuum suction cup 1312 through the air pump 121 when the display module is adsorbed.

[0083] Specifically, the telescopic air rod 1311 is connected to the air pump 121 via the third air pipe 128. The air pump control unit 111 can suck the air out of the vacuum suction cup 1312 through the third air pipe 128 to control the vacuum suction cup 1312 to adhere to the display module. In this embodiment, the air pump 121 is used to control the vacuum suction cup 1312 to adhere to the display module. When the display module is no longer adhered to and needs to be released, the air pump 121 can simply output air to the vacuum suction cup 1312 via the third air pipe 128, making the release of the display module by the telescopic suction unit 131 easy to control.

[0084] In other optional embodiments of the present invention, the piston rod directly connected to the piston 1221 is used as the telescopic gas rod 1311.

[0085] Figure 6 is a schematic structural diagram of another bending device of a display module provided by an embodiment of the present invention, referring to Figure 6 , combined with Figure 2-Figure 6 Optionally, the display module bending device further includes a housing 140. One side of the housing 140 includes an opening, and a buffer structure 150 is disposed at the opening. The buffer structure 150 is recessed toward the interior of the housing 140 and includes openings corresponding to the telescopic adsorption units 131. The telescopic adsorption units 131 pass through the openings, and the driving module 120 is located within the housing 140. Optionally, the buffer structure 150 comprises a silicone material. The provision of the buffer structure 150 provides a buffer for the extension and retraction of the telescopic adsorption units 131, ensuring that the movement of the telescopic adsorption units 131 is not excessive, thereby preventing damage to the display module.

[0086] The embodiment of the present invention further provides a method for bending a display module. Figure 7 This is a flow chart of a bending method for a display module provided by an embodiment of the present invention. The bending method for the display module is executed by a bending device of the display module. The bending device includes a telescopic adsorption module, a driving module and a control module. The telescopic adsorption module includes at least one column of telescopic adsorption units. Each column of telescopic adsorption units includes multiple telescopic adsorption units. In each column of telescopic adsorption units, each telescopic adsorption unit is arranged along a first direction, and the first direction is perpendicular to the telescopic direction of the telescopic adsorption unit. The display module includes a first non-bending area, a second non-bending area and an area to be bent between the first non-bending area and the second non-bending area. The bending method for the display module can be specifically executed by the control module in the bending device of the display module by controlling the driving module, refer to Figure 7 , the bending method of the display module includes:

[0087] Step 210 : bend the display module and make the display module reach a target bending state where the first non-bending region and the second non-bending region are parallel.

[0088] Wherein, in the target bending state, the first direction is perpendicular to the plane where the first non-bending area is located.

[0089] In some embodiments of the present invention, the above-mentioned step 210 includes: when the area to be bent of the display module is in a flattened state, driving the telescopic adsorption units located in the middle row of the telescopic adsorption module through the driving module to adsorb the area to be bent of the display module; wherein, when the area to be bent of the display module is in a flattened state, the first direction is parallel to the line connecting the first non-bending area and the area to be bent; the row direction in which the telescopic adsorption units are arranged intersects with the first direction; then the area to be bent of the display module is bent, and after reaching the target bending state, the area to be bent is subjected to multi-point adsorption by other telescopic adsorption units of the telescopic adsorption module.

[0090] When the telescopic adsorption module includes p rows of telescopic adsorption units, p is an odd number greater than 2, and the telescopic adsorption units located in the middle row of the telescopic adsorption module are the telescopic adsorption units located in the (p+1) / 2th row. When the telescopic adsorption module includes q rows of telescopic adsorption units, q is an even number greater than 2, and the telescopic adsorption units located in the middle row of the telescopic adsorption module are the telescopic adsorption units located in the q / 2th row or the (q / 2)+1th row. When the area to be bent of the display module is in a flattened state, the driving module drives the telescopic adsorption units located in the middle row of the telescopic adsorption module to adsorb the area to be bent of the display module; then the area to be bent of the display module is bent, and after reaching the target bending state, the other telescopic adsorption units of the telescopic adsorption module perform multi-point adsorption on the area to be bent, that is, before the display module is bent, the telescopic adsorption units in the middle row complete adsorption with the area to be bent, so that when the display module is bent, the areas to be bent on both sides of the adsorption positions of the telescopic adsorption units in the middle row are bent more smoothly and evenly, which is beneficial to reducing line breakage in the bending zone and improving the performance of the bending zone.

[0091] In other optional embodiments of the present invention, step 210 includes: bending the display module's to-be-bent region to a target bending state, and then performing multi-point adsorption of the to-be-bent region by each of the telescopic adsorption units of the telescopic adsorption module. That is, all of the telescopic adsorption units perform adsorption of the to-be-bent region after the display module is bent to the target bending state.

[0092] Optionally, bending the to-be-bent area of ​​the display module to achieve a target bending state includes:

[0093] When the display module is in a completely flat state, the second non-bending area of ​​the display module is fixed, and the bending driving device drives the area to be bent and the first non-bending area to rotate, so that the display surface located in the first non-bending area gradually moves away from the second non-bending area to reach the target bending state.

[0094] Among them, the bending driving device may include a driving head. When the display module is in a completely flat state, the driving head can be adsorbed on the first non-bending area. The driving head drives the first non-bending area and the area to be bent to rotate, so that the display surface located in the first non-bending area gradually moves away from the second non-bending area.

[0095] In some optional embodiments of the present invention, the second bending area can be the display area of ​​the display module, wherein the display area is the area where the display device is set, and the display device can be an organic light-emitting display device, an inorganic light-emitting display device, etc.; in other optional embodiments of the present invention, the second bending area can be the bonding area of ​​the display module, and the bonding area can be the area where the display module is connected to the flexible circuit board.

[0096] Figure 8 Schematic diagram of using the bending device of the display module of the embodiment of the present invention to bend the display module. Therefore, in this step, the multiple telescopic adsorption units of the telescopic adsorption module are driven to perform multi-point adsorption on the to-be-bent area 30 of the display module. For example, in the above embodiment of the present invention, Figure 5 The bending device shown can evacuate the vacuum suction cup through the air pump and the third air pipe to achieve the adsorption of the display module by the vacuum suction cup of the telescopic adsorption unit.

[0097] Step 220: Control the telescopic distance of each telescopic adsorption unit through the driving module, and achieve a state in which the telescopic adsorption units gradually retract in the retraction direction from the telescopic adsorption units on both sides to the middle telescopic adsorption unit along the first direction.

[0098] The first direction is perpendicular to the extension direction.

[0099] For example, in the above embodiment of the present invention Figure 4 and Figure 5 The bending device can control the telescopic distance of the telescopic adsorption units by controlling the air pump's ventilation state into the cylinder through the first and second air pipes, and / or the air volume per unit time. For example, if the air volume per unit time is constant, the time the air pump uses to draw air from the cylinder through the first air pipe can be controlled to gradually increase from the outermost telescopic adsorption unit to the middle telescopic adsorption unit; and / or, if the time the air pump uses to draw air from the cylinder through the first air pipe is constant, the air volume of the corresponding first air pipe can be controlled to gradually increase from the outermost telescopic adsorption unit to the middle telescopic adsorption unit.

[0100] It should be noted that the above only provides an implementation method for achieving a state in which the telescopic adsorption units gradually recess in the retracting direction of the telescopic adsorption units from the telescopic adsorption units on both sides to the middle telescopic adsorption unit along the first direction. Those skilled in the art can use the bending device of the display module to achieve the above state in other ways, which are not listed here one by one.

[0101] When the second non-bending area is parallel to the first non-bending area, the display surface located in the first non-bending area is completely away from the second non-bending area.

[0102] The display module bending method of this embodiment drives the multiple telescopic adsorption units of the telescopic adsorption module of the bending device to perform multi-point adsorption on the display module's to-be-bent area when the display module's to-be-bent area is in a flattened state. The driving module controls the telescopic distance of each telescopic adsorption unit to achieve a state in which the telescopic adsorption units gradually concave in a first direction from the telescopic adsorption units on both sides to the central telescopic adsorption unit in a retracting direction. This allows the display module's to-be-bent area to form a shape that matches the contour of one end of each telescopic adsorption unit adsorbed on the display module, making the bending shape of the display module's to-be-bent area smoother and improving the performance of the bending zone.

[0103] On the basis of the above embodiment, optionally, along the first direction, from the telescopic adsorption units on both sides to the middle telescopic adsorption unit, in a state where the telescopic adsorption units are gradually recessed in the retraction direction of the telescopic adsorption units, in each column of telescopic adsorption units, the lines connecting the adsorption points of each telescopic adsorption unit and the display module are symmetrical about the perpendicular bisector of the lines connecting the adsorption points of the two outermost telescopic adsorption units and the display module, and the perpendicular bisector is the perpendicular bisector extending along the retraction direction; thereby, the adsorption of the area to be bent of the display module by the telescopic adsorption module can be ensured, so that the bending shape of the area to be bent is smoother, further reducing the risk of breakage of the metal wire.

[0104] Optionally, when the telescopic adsorption units gradually recede in the direction of their retraction, from the telescopic adsorption units on both sides to the center, the adsorption points between each telescopic adsorption unit and the display module may be arc-shaped. This further ensures that the adsorption of the display module's to-be-bent region by the telescopic adsorption module results in a smoother bending shape, avoids sharp corners in the bending shape, and further reduces the risk of metal wire breakage. The arc-shaped adsorption points between each telescopic adsorption unit and the display module mean that each adsorption point is located on an arc.

[0105] Optionally, when the telescopic adsorption units gradually become concave in the direction of retraction of the telescopic adsorption units from the two side units to the middle telescopic adsorption unit, the contours of the adsorption points between each telescopic adsorption unit and the display module are arcs of equal radius. The contours of the adsorption points between each telescopic adsorption unit and the display module being arcs of equal radius means that each adsorption point is on an arc of equal radius.

[0106] Specifically, the contours of the adsorption points of each telescopic adsorption unit and the display module are arcs with equal radius, which can make the bending shape of the area to be bent also an arc with equal radius, thereby ensuring that the bending shape of the area to be bent is particularly smooth, avoiding sharp corners in the bending shape, further reducing the risk of metal wire breakage, and ensuring a good bending effect.

[0107] Figure 9 is a flow chart of another method for bending a display module provided by an embodiment of the present invention, referring to Figure 9 Optionally, the display module bending method includes:

[0108] Step 410: When the display module is in a completely flat state, apply a material of a limiting structure to the area to be bent.

[0109] After the display module is bent, the material of the limiting structure forms the limiting structure, the area to be bent forms a bending area, and the limiting structure is located inside the bending area.

[0110] Combine Figure 8 Specifically, the material of the limiting structure 60 can be a colloid. Due to the fluidity of the colloid, after the display module is bent, the limiting structure 60 can fill the empty space inside the bending region, thereby limiting the first support film 40 in the first non-bending region 10 and the second support film 50 in the second non-bending region 20 of the display module, thereby preventing the first support film 40 and the second support film 50 from shifting during the bending process.

[0111] Step 420: bend the display module and bring it into a target bending state where the first non-bending region and the second non-bending region are parallel. This step is the same as the process of step 210 in the above embodiment and will not be repeated here.

[0112] Step 430: Control the telescopic distance of each telescopic adsorption unit through the driving module, and achieve a state in which the telescopic adsorption units gradually retract in the first direction from the telescopic adsorption units on both sides to the middle telescopic adsorption unit; this step is the same as the step 220 process in the above embodiment and will not be repeated here.

[0113] It should be noted that in this embodiment, by coating the material of the limiting structure on the area to be bent when the display module is in a completely flattened state, and then controlling the telescopic distance of each telescopic adsorption unit through the driving module, and reaching a state in which the telescopic adsorption units are gradually recessed in the retraction direction from the telescopic adsorption units on both sides to the middle telescopic adsorption unit along the first direction, the material of the limiting structure flows to fill the empty position inside the bending area, which can make the bending shape of the bending area smoother, avoid the deviation of the support film, and reduce the problem of metal wire breakage.

[0114] An embodiment of the present invention further provides a display module, Figure 10 This is a structural schematic diagram of a display module provided by an embodiment of the present invention. The display module is bent using the bending method of the display module of any of the above embodiments of the present invention to obtain a bent display module, and has the beneficial effects of the bending method of the display module of any of the above embodiments of the present invention.

[0115] refer to Figure 10 The bent display module includes a first non-bending area 10, a second non-bending area 20 and a bending area 31 between the first non-bending area 10 and the second non-bending area 20; the display module also includes a limiting structure 60, which is located on the inner side of the bending area 31; optionally, the display module also includes a first support film 40 and a second support film 50, the first support film 40 is located in the first non-bending area 10, the second support film 50 is located in the second non-bending area 20, the first support film 40 and the second support film 50 are arranged opposite to each other, and the limiting structure 60 is in contact with the first support film 40 and the second support film 50.

[0116] The limiting structure 60 can fill the empty space inside the bending region 31 and can limit the first support film 40 in the first non-bending region 10 and the second support film 50 in the second non-bending region 20 of the display module, preventing the first support film 40 and the second support film from shifting during the bending process, further preventing the metal wires in the bending region 31 from breaking. A supporting foam can also be included between the first support film 40 and the second support film 50, and the limiting structure 60 fills the space inside the bending region 31 outside the first support film 40, the second support film 50, and the supporting foam.

[0117] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for bending a display module, characterized in that: The display module is bent by a bending device, the bending device including a telescopic adsorption module and a driving module, the telescopic adsorption module including at least one column of telescopic adsorption units, each column of the telescopic adsorption units including a plurality of the telescopic adsorption units, and each of the telescopic adsorption units in each column of the telescopic adsorption units being arranged along a first direction perpendicular to the telescopic direction of the telescopic adsorption units; the display module including a first non-bending region, a second non-bending region, and a to-be-bent region between the first non-bending region and the second non-bending region; The display module bending method includes: Bending the display module to achieve a target bending state in which the first non-bending region and the second non-bending region are parallel; wherein, in the target bending state, the first direction is perpendicular to a plane on which the first non-bending region is located; The driving module controls each of the telescopic adsorption units to perform multi-point adsorption on the to-be-bent area of ​​the display module, and controls the telescopic distance of each of the telescopic adsorption units so as to achieve a state in which, along the first direction, the telescopic adsorption units gradually retract from the telescopic adsorption units on both sides to the middle telescopic adsorption unit; The step of bending the display module and making the display module reach a target bending state in which the first non-bending region and the second non-bending region are parallel to each other includes: The to-be-bent region of the display module is bent, and after reaching the target bending state, the to-be-bent region is subjected to multi-point adsorption by each of the telescopic adsorption units of the telescopic adsorption module.

2. The display module bending method according to claim 1, wherein: The step of bending the display module and making the display module reach a target bending state in which the first non-bending region and the second non-bending region are parallel to each other includes: When the area to be bent of the display module is in a flattened state, the driving module drives the telescopic adsorption units located in the middle row of the telescopic adsorption module to adsorb the area to be bent of the display module; wherein, when the area to be bent of the display module is in a flattened state, the first direction is parallel to a line connecting the first non-bending area and the area to be bent; and the row direction in which the telescopic adsorption units are arranged intersects with the first direction.

3. The display module bending method according to claim 2, wherein: Bending the to-be-bent region of the display module to achieve the target bending state, comprising: When the display module is in a completely flattened state, the second non-bending area of ​​the display module is fixed, and the area to be bent and the first non-bending area are driven to rotate by a bending driving device, so that the display surface located in the first non-bending area gradually moves away from the second non-bending area to reach the target bending state.

4. The display module bending method according to claim 1, wherein: Along the first direction, in a state where the telescopic adsorption units gradually sink in the retraction direction of the telescopic adsorption units from the two sides to the middle telescopic adsorption unit, in each column of the telescopic adsorption units, the lines connecting the adsorption points of each telescopic adsorption unit and the display module are symmetrical about the perpendicular bisector of the lines connecting the adsorption points of the two outermost telescopic adsorption units and the display module, and the perpendicular bisector is the perpendicular bisector extending along the retraction direction.

5. The display module bending method according to claim 4, wherein: When the telescopic adsorption units from the two sides to the middle gradually become concave in the retracting direction of the telescopic adsorption units, the outline of the adsorption point between each telescopic adsorption unit and the display module is an arc.

6. The display module bending method according to claim 5, wherein: When the telescopic adsorption units on both sides gradually become concave toward the retraction direction of the telescopic adsorption units to the middle telescopic adsorption unit, the outlines of the adsorption points of each telescopic adsorption unit and the display module are arcs with equal radius.

7. The display module bending method according to claim 1, wherein: When the telescopic adsorption module includes a row of the telescopic adsorption units, the telescopic adsorption units are adsorbed on a line passing through the center of the area to be bent; When the telescopic adsorption module includes m columns of the telescopic adsorption units, where m is an odd number greater than 2, the telescopic adsorption units in the (m+1) / 2th column are adsorbed on a line passing through the center of the area to be bent; When the telescopic adsorption module includes n columns of the telescopic adsorption units, where n is an even number greater than or equal to 2, n / 2 columns of the telescopic adsorption units are adsorbed on a first side of a line passing through the center of the area to be bent, and another n / 2 columns of the telescopic adsorption units are adsorbed on a second side of a line passing through the center of the area to be bent, so that the n / 2 columns of the telescopic adsorption units and the another n / 2 columns of the telescopic adsorption units are symmetrical about the line passing through the center of the area to be bent.

8. The display module bending method according to claim 1, wherein: Before bending the display module, the method further includes: When the display module is in a completely flat state, coating the area to be bent with a material of a limiting structure; Wherein, after the display module is bent, the material of the limiting structure forms a limiting structure, the area to be bent forms a bending area, and the limiting structure is located inside the bending area.

9. A display module, characterized in that: The bent display module is obtained by bending using the bending method according to any one of claims 1 to 8.

10. The display module according to claim 9, wherein: The bent display module includes a first non-bending area, a second non-bending area, and a bending area between the first non-bending area and the second non-bending area; the display module also includes a limiting structure, which is located on the inner side of the bending area.

11. The display module according to claim 10, wherein: The display module also includes a first supporting film and a second supporting film, the first supporting film is located in a first non-bending area, the second supporting film is located in a second non-bending area, the first supporting film and the second supporting film are arranged opposite to each other, and the limiting structure is in contact with the first supporting film and the second supporting film.

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