ARRAY SUBSTRATE, DISPLAY PANEL AND DISPLAY DEVICE

An array substrate, a display panel and a display device are provided by the present application. The array substrate includes a first body, a bending part and a second body arranged in a first direction. The first body is connected to the second body through the bending part. The bending part includes a bending body and a first connecting part arranged on a side of the bending body near the first body, the first connecting part includes a first connecting segment and at least one first external expansion segment located on at least one side of the first connecting segment in the second direction, the bending body is connected to the first body through the first connecting segment, and in the first direction, two ends of the bending body in the second direction are flush with two ends of the first connecting segment in the second direction, respectively.

TECHNICAL FIELD

The present application relates to the technical field of display, and in particular to an array substrate, a display panel and a display device.

BACKGROUND

With the development of science and technology, display devices have been rapidly developed. Currently, small-sized display devices such as an electronic watch have been increasingly widely used. However, the small-sized display devices significantly increase the difficulty of manufacture. Therefore, how to improve the yield of the small-sized display devices has become an urgent problem to be solved.

SUMMARY

The present application provides an array substrate, a display panel and a display device, which can improve the product yield.

Embodiments in the present application provide an array substrate, including a first body, a bending part and a second body arranged in a first direction. The first body is connected to the second body through the bending part, a maximum width of the bending part in a second direction is smaller than a maximum width of the first body in the second direction, and the first direction intersects with the second direction. The bending part includes a bending body and a first connecting part arranged on a side of the bending body near the first body, the first connecting part includes a first connecting segment and at least one first external expansion segment located on at least one side of the first connecting segment in the second direction, the bending body is connected to the first body through the first connecting segment, and in the first direction, two ends of the bending body in the second direction are flush with two ends of the first connecting segment in the second direction, respectively.

In a second aspect, embodiments in the present application provide a display panel, including the array substrate according to any one of the embodiments as described above and a light-emitting member layer. An orthographic projection of the light-emitting member layer on the array substrate is located within the first body.

In a third aspect, embodiments in the present application provide a display device, including the display panel according to any one of the embodiments as described above.

In the embodiments of the present application, by arranging the first external expansion segment and positioning the first external expansion segment on at least one side of the first connecting segment in the second direction, the strength of an end of the first connecting segment in the second direction can increase. Moreover, due to the size of the first external expansion segment, the stress intensity at a position of the end can be dispersed, so that the risk of the stress concentration at a position of the end can be reduced. In addition, the first external expansion segment can also increase a width size of the first connecting part in the second direction. By increasing the width size, the structural strength of the first connecting part can be enhanced, and the reliability of the first connecting part can be improved.

DETAILED DESCRIPTION

Embodiments of the present application will be further described in detail according to the drawings and examples below. The detailed description and drawings of the following embodiments are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

Currently, various small-sized flexible display panels are presented in the market, and include various wearable products such as an electronic watch. Since such display panel has a small volume, generally, the requirement of system integration is high, and a structural size of a non-display region is greatly compressed. In order to meet the wiring need of the display panel, in many solutions, the non-display region of the display panel is bent to a side of a backlight face of the display panel to improve the display effect of the display panel.

During the manufacturing process of the display panel, there is a bending region between the display region and the non-display region of the display panel, and the non-display region can be bent to the side of the backlight face of the display panel through the bending region. Generally, a width of the bending region is small, and a width of the display panel near the bending region will rapidly decrease. During a module operation, such as a manual operation, due to uneven stress distribution, it is prone to a significant stress at a connection between the bending region and the display region, resulting in the stress concentration at the connection. Further, it is prone to cause the crack phenomenon between the bending region and the display region, which can affect the yield of the display panel.

In order to solve the above problems, referring toFIG.1andFIG.3, embodiments of the present application provide an array substrate including a first body1, a bending part3and a second body2arranged in a first direction X. The first body1is connected to the second body2through the bending part3, a maximum width of the bending part3in a second direction Y is smaller than a maximum width of the first body1in the second direction Y, and the first direction X intersects with the second direction Y.

The bending part3includes a bending body31and a first connecting part32arranged on a side of the bending body3near the first body1, the first connecting part32includes a first connecting segment321and at least one first external expansion segment322located on at least one side of the first connecting segment321in the second direction Y, the bending body31is connected to the first body1through the first connecting segment321, and in the first direction X, two ends of the bending body31in the second direction Y are flush with two ends of the first connecting segment321in the second direction Y, respectively.

The first body1, the bending part3and the second body2are arranged side by side in sequence in the first direction X. The first body1of the array substrate corresponds to a display region of the display panel, and the second body2of the array substrate corresponds to a non-display region of the display panel. The second body2can be bent to a side of a back face of the first body1through the bending part3, so that the first body1overlaps with the second body2in the thickness direction of the array substrate.

It should be noted that the “display region of the display panel” mentioned in the embodiments of the present application refers to: most of a region of the display panel at a corresponding position of the first body1is the display region. Of course, at the corresponding position of the first body1in the display panel and located on a peripheral side of the display region, there may be a small portion of the region for arranging wiring, which cannot achieve the display effect. Alternatively, the display panel may be a full screen display panel, which means that all of the region of the display panel at the corresponding position of the first body1is the display region, and the embodiments of the present application do not limit this.

The maximum width of the bending part3in the second direction Y is smaller than the maximum width of the first body1in the second direction Y, and the second direction Y may be the width direction of the first body1. The first direction X intersects with the second direction Y, and the embodiments of the present application do not limit a magnitude of an angle between the first direction X and the second direction Y. Exemplarily, the first direction X is perpendicular to the second direction Y.

The embodiments of the present application do not limit the contour and shape of the first body1. Exemplarily, the first body1is a circular structure, and in a direction of the first body1towards the bending region, the width of the first body1in the second direction Y gradually increases firstly, and then decreases gradually. Alternatively, the first body1is a triangular structure, and in the direction of the first body1towards the bending region, the width of the first body1in the second direction Y gradually decreases. The width of the array substrate at the connection between the bending part3and the first body1rapidly changes. Therefore, during the module operation, due to the uneven force on the array substrate, it is prone to the phenomenon of the stress concentration at the connection between the bending part3and the first body1. Therefore, the embodiments of the present application has improved the structure of the bending part3.

Specifically, the bending part3includes the bending body31and the first connecting part32arranged side by side in the first direction X, and the first connecting part32is located between the bending body31and the first body1. The bending body31is a region in the bending part3that realizes the bending effect, and the first connecting part32is a region in the bending part3used to connect with the first body1. Although the first connecting part32is not bent during the bending process, the first connecting part32is a region which is most susceptible to be impacted and cause the problem in the bending part3during the bending process or other module operations.

The first connecting part32includes the first connecting segment321, which can realize the connection between the first body1and the bending body31. In other words, a size of the first connecting segment321in the second direction Y is the same as a size of the bending body31in the second direction Y, and in the first direction X, two ends of the bending body31in the second direction Y are flush with two ends of the first connecting segment321in the second direction Y, respectively. Therefore, the first connecting segment321can achieve the connection between the first body1and the bending body31.

In addition to the first connecting segment321, the first connecting segment32further includes the first external expansion segment322. The first external expansion segment322is located on at least one side of the first connecting segment321in the second direction Y. The first connecting segment321and the first external expansion segment322may be an integrated structure. Similar to the first connecting segment321, the first external expansion segment322is also connected to the first main body1; the difference is that the first external expansion segment322is not connected to the bending body31.

It can be seen from the above content, it is prone to the phenomenon of the stress concentration at the connection between the bending part3and the first body1. In a display panel in the related art, the connection between the bending part3and the first body1is an end of the first connecting segment321in the second direction Y, where is prone to crack or other problems.

In the embodiments of the present application, by arranging the first external expansion segment322and positioning the first external expansion segment322on at least one side of the first connecting segment321in the second direction Y, the strength of the end of the first connecting segment321in the second direction Y can be improved. Moreover, due to the size of the first external expansion segment322, the stress intensity at a position of the end can be dispersed, so that the risk of the stress concentration at a position of the end can be reduced.

In addition, the first external expansion segment322can also increase the width size of the first connecting part32in the second direction Y, and the increase in the width size means that the structural strength of the first connecting part32can be enhanced, thereby improving the reliability of the first connecting part32. Optionally, at least two first external expansion segments322are provided. In some embodiments, two first external expansion segments322are provided. The two first external expansion segments322are arranged at two ends of the first connecting segment321in the second direction Y, respectively.

It should be noted that the array substrate provided by the embodiments of the present application is suitable for the display panel that requires bending the non-display region to a side of the backlight face. For other film layers in the display panel in addition to the array substrate, other portions of the film layers will also be bent with the array substrate. Therefore, the portion of the film layers can also be the same shape and contour as the array substrate provided by the embodiments of the present application, which is not limited by the embodiments of the present application.

After a plurality of experimental tests, the applicant obtains the data shown inFIG.4. Herein, the data in a vertical direction represents the torque value, and the diagram represents the maximum torques that the array substrate can withstand under four different conditions and the plurality of experimental tests. The related art refers to an array substrate without the first external expansion segment322, and all of comparative example I, comparative example II and comparative example III refer to the array substrate with the first external expansion segment322. The difference among comparative example I, comparative example II and comparative example III is that the width of the first external expansion segment322in the second direction is different. The width of the first external expansion segment322in the second direction in comparative example III is larger than that of comparative example II, and the width of the first external expansion segment322in the second direction in comparative example II is larger than that of comparative example I.

By comparing the related art with comparative example I, it can be seen that the first external expansion segment322can significantly increase the maximum allowable torque of the array substrate. Specifically, in a case without arranging the first external expansion segment322, the average allowable torque of the array substrate under a certain condition is 6.19 N·mm; in a case of arranging the first external expansion segment322and setting the size of the first external expansion segment322in the second direction Y to 0.8 mm, the average allowable torque of the array substrate under the same condition is 12.81 N·mm.

Furthermore, comparing with comparative example I, comparative example II and comparative example III, it can be seen that the larger the width of the first external expansion segment322in the second direction Y is, the larger the average torque of the corresponding array substrate under the same condition is, and more reliable the structure of the array substrate is.

In some embodiments, a first edge E1is arranged on a side of the first external expansion segment322away from the first body1in the first direction X, and a second edge E2is arranged on a side of the first external expansion segment322away from the first connecting segment321in the second direction Y; and at least one of the first edge E1or the second edge E2is a curved structure.

In the embodiments of the present application, the first external expansion segment311is located on at least one side of the first connecting part32in the second direction Y. On this basis, in order to reduce the impact of an outer contour of the first external expansion segment311on the tactile feel of the display panel, in the embodiments of the present application, at least one of the first edge E1or the second edge E2in the first external expansion segment311is the curved structure. Exemplarily, each of the first edge E1and the second edge E2is an arc-shaped structure. According to this design, the tactile feel at the position of the first external expansion segment311can be improved. In addition, according to this design, when the first external expansion segment311is impacted by the external force, the buffering effect to a certain extent can be achieved, and the reliability can be improved.

In some embodiments, as shown inFIG.3, the first edge E1extending in the second direction Y is arranged on a side of the first external expansion segment322away from the first body1in the first direction X, and the second edge E2extending in the first direction X is arranged on a side of the first external expansion segment322away from the first connecting segment321in the second direction Y.

In a display panel in the related art, an arc angle structure is often used for transitional connection between the bending part3and the first body1, and generally, the arc angle structure protrudes towards the direction towards the first body1, that is, the arc angle structure protrudes inward. This design leads to the stress concentration problem at the position of the arc angle structure, which is not conducive to the manufacture of the display panel.

In the embodiments of the present application, the first external expansion segment322includes the first edge E1and the second edge E2, the first edge E1extends in the second direction Y, and the second edge E2extends in the first direction X. In this design, the first external expansion segment322protrudes in a direction away from the first body1, that is, the first external expansion segment322is formed by protruding outward. Compared with the arc-shaped structure in related art, the first external expansion segment322provided by the embodiments of the present application can further increase the size of the first connecting part32, and can disperse the stress intensity at the connection between the bending part3and the first body1, thereby reducing the risk of stress concentration at this position.

It should be noted that the first edge E1can be directly connected to the second edge E2in contact, or the first edge E1and the second edge E2can be indirectly connected through another structure. The embodiments of the present application do not limit the connection method and do not limit an angle between the first edge E1and the second edge E2. The angle between the first edge E1and the second edge E2can be an acute angle, a right angle or an obtuse angle.

In some embodiments, the first edge E1is perpendicular to or at an obtuse angle with the second edge E2.

The first edge E1and the second edge E2respectively extend in different directions, and the angle between the first edge E1and the second edge E2determines the shape and contour of the first external expansion segment322. On this basis, in the embodiments of the present application, the first edge E1is perpendicular to or at the obtuse angle with the second edge E2, thereby avoiding an acute angle between the first edge E1and the second edge E2.

Specifically, in the case that the angle between the first edge E1and the second edge E2is set at the acute angle, if the first edge E1and the second edge E2are directly connected, the first external expansion segment322will form a sharp end. During using the display panel, it is prone to collision and damage at the connection between the first edge E1and the second edge E2under the external force, and the sharp end is easy to harm the user.

Therefore, in order to avoid the above problem, in the embodiments of the present application, the first edge E1is perpendicular to or at the obtuse angle with the second edge E2. The specific angle size between the first edge E1and the second edge E2needs to be determined based on the actual using needs of the display panel, and embodiments of the present application do not limit it.

In some embodiments, referring toFIG.5, the first external expansion segment322further includes an arc-shaped connecting segment E3connecting the first edge E1with the second edge E2.

The arc-shaped connecting segment E3is used to connect the first edge E1and the second edge E2. The design of the arc-shaped connecting segment E3allows for a smooth transition at the connection between the first edge E1and the second edge E2, thereby reducing the risk of collision and damage at the connection between the first edge E1and the second edge E2, and providing a better using experience to the user.

In some embodiments, referring toFIG.2andFIG.5, the array substrate includes at least one first electric-conducting part11located inside the first body1, at least one second electric-conducting part21located inside the second body2and at least one conductive part4located within the bending part3connecting the first electric-conducting part11with the second electric-conducting part21. At least a portion of the conductive part4is located inside the first external expansion segment322.

The first electric-conducting part11is located in the first body1. Exemplarily, the array substrate further includes a pixel electrode located in the first body1, and the first electric-conducting part11is electrically connected to the pixel electrode, so as to achieve the luminous effect of the display panel. The second electric-conducting part21is located in the second body2. Exemplarily, the second body2further includes a driving chip. The second electric-conducting part21is electrically connected to the driving chip, so as to transmit the driving signal in the driving chip to different positions.

The conductive part4is located in the bending part3and is used to achieve electrical connection between the first electric-conducting part11and the second electric-conducting part21. The conductive part4can transmit the signal from the second electric-conducting part21to the first electric-conducting part11, or can transmit the signal from the first electric-conducting part11to the second electric-conducting part21. Optionally, a portion of the first electric-conducting part11used to connect with the conductive part4is a fan-out structure, and at least a portion of the first electric-conducting part11extends along an outer contour of the first body1; a portion of the second electric-conducting part21used to connect with the conductive part4is a fan-out structure, and at least a portion of the second electric-conducting part21extends along an outer contour of the second body2.

Since the maximum width of the bending part3in the second direction Y is smaller than the maximum width of the first body1in the second direction Y, generally, a distance between two conductive parts4located in the bending part3is smaller than a distance between two first electric-conducting parts11located in the first body1. In other words, the wiring density in the bending part3is larger than that the wiring density in the first body1.

In the display panel in the related art, a dense and complex wiring is arranged near the connection between the bending part3and the first body1. During the wiring manufacturing process, it is often necessary to use the process such as the chemical vapor deposition for film formation. After manufacturing, groove structures are often formed on a surface, resulting in the stress concentration at the microscopic level.

On this basis, in the embodiments of the present application, the problem of stress concentration can be solved by arranging the first external expansion segment322. In addition, at least a portion of the conductive part4is arranged in the first external expansion segment322, thereby increasing the distance between two adjacent conductive parts4located in the first connecting segment32and reducing the risk of signal interference. Alternatively, more conductive parts4can be arranged win the first connecting part32, so as to meet the wiring needs of the display panel with high pixel density and improve the display effect of the display panel.

In some embodiments, as shown inFIG.3andFIG.6, the conductive part4includes a first sub-segment41connected to the first electric-conducting part11, a second sub-segment42connected to the second electric-conducting part21and a third sub-segment43connected to the first sub-segment41and the second sub-segment42.

The first sub-segment41is electrically connected to the first electric-conducting part11to achieve the signal transmission with the first electric-conducting part11. The second sub-segment42is electrically connected to the second electric-conducting part21to achieve the signal transmission with the second electric-conducting part21. The two ends of the third sub-segment43are electrically connected to the first sub-segment41and the second sub-segment42, respectively, so as to achieve the signal transmission between the first sub-segment41and the second sub-segment42.

In the display panel in the related art, the wiring located between the bending part3and the first body1and near the arc angle structure is usually an arc-shaped wiring. During module operation, there is the stress concentration effect near the arc angle structure, and the extending direction of the wiring at this position is easily perpendicular to the direction of the force, which means that the wiring at this position is easily subjected to a vertical tangential force, so that it prone to wiring breakage.

In the embodiments of the present application, the conductive part4includes the first sub-segment41, the second sub-segment42and a third sub-segment43. The first sub-segment41, the second sub-segment42and the third sub-segment43are three independent parts. By adjusting the extending directions of these three parts, the problem of the extending direction of the wiring being perpendicular to the direction of the force can be avoided, the risk of the conductive part4breaking can be reduced and the product yield can be improved.

In some embodiments, the first sub-segment41extends in the first direction X and at least a portion of the first sub-segment41is located within the first external expansion segment322.

Since the first sub-segment41extends in the first direction X, and the second edge E2also extends in the first direction X, the first sub-segment41is parallel to the second edge E2. During the manufacturing process of the first sub-segment41, the first sub-segment41is arranged to fit the second edge E2and formed by extending in the direction of the second edge E2.

In the embodiments of the present application, since the first sub-segment41extends in the first direction X, during the module operation, the force direction between the bending part3and the first body1is usually between the first direction X and the second direction Y, which can avoid the extending direction of the first sub-segment41being perpendicular to the force direction, reduce the tangential force of the external force exerting on the first sub-segment41, reduce the risk of fracture of the first sub-segment41, and improve the yield and reliability.

In some embodiments, the third sub-segment43extends in the second direction Y and at least a portion of the third sub-segment43is located within the first external expansion segment322.

Since the third sub-segment43extends in the second direction Y, and the first edge E1also extends in the second direction Y, the third sub-segment43is parallel to the first edge E1. In the manufacturing process of the third sub-segment43, the third sub-segment43is arranged to fit the first edge E1and formed by extending in the direction of the first edge E1.

In the embodiments of the present application, as the third sub-segment43extends in the second direction Y, during the module operation, the force direction between the bending part3and the first body1is usually between the first direction X and the second direction Y, which can avoid the extending direction of the third sub-segment43being perpendicular to the force direction, reduce the tangential force of the third sub-segment43, reduce the risk of fracture of the third sub-segment43, and improve the yield and reliability.

In addition, the embodiments of the present application do not limit the extending direction of the second sub-segment42. Exemplarily, the second sub-segment42extends in the first direction X, that is, the second sub-segment42is parallel to the first sub-segment41.

In some embodiments, referring toFIG.6andFIG.7, at least one of the first sub-segment41, the second sub-segment42or the third sub-segment43is in a wave shape. Optionally, all the first sub-segment41, the second sub-segment42and the third sub-segment43are in wave shape.

The design of wave shape can reduce the risk of fracture of the conductive part4. Specifically, due to the influence of the external stress, the conductive part4is prone to fracture under the pulling action of the external force, which may lead to the connection failure or poor performance. In view of this, at least one of the first sub-segments41, the second sub-segment42or the third sub-segment43is in the wave shape; since the wave-shaped structure itself has a certain elastic and compressive capacity, the overall strength of the conductive part4can be improved and the conductive part4can still ensure its complete and reliable structure under the external force.

The embodiments of the present application do not limit the specific structure of the wave-shaped wiring. Exemplarily, in the wave-shaped wiring, each two adjacent peaks are aligned with each other and each two adjacent valleys are aligned with each other. A wave depth H, which is a height difference between the peak and valley, is larger than a wave width W, which is a distance between each two adjacent peaks.

It should be noted that when the first sub-segment41, the second sub-segment42and the third sub-segment43are wave-shaped, the extending direction of the first sub-segment41and the third sub-segment43is the overall extending trend of the wave-shaped structure. Exemplarily, the extending direction of the first sub-segment41, the second sub-segment42and the third sub-segment43can be a direction of a connecting line between adjacent wave peaks in the corresponding wave-shaped structure.

In some embodiments, referring toFIG.3andFIG.8, at least one of the first sub-segment41, the second sub-segment42or the third sub-segment43is provided with a through hole HL that penetrates in the thickness direction of the array substrate. Optionally, each of the first sub-segment41, the second sub-segment42and the third sub-segment43is provided with the through hole HL.

The embodiments of the present application do not limit the number of through holes HL and the specific positions of through holes HL relative to the first sub-segment41, the second sub-segment42or the third sub-segment43. Exemplarily, the first sub-segment41is provided with a plurality of through holes HL, which are arranged side by side in the second direction Y, that is, the plurality of through holes HL are arranged side by side in the extending direction of the first sub-segment41.

The through-hole HL can reduce the risk of fracture in the first sub-segment41, second sub-segment42and third sub-segment43. Specifically, at a position of the through-hole HL, at least one of the first sub-segment41, second sub-segment42or third sub-segment43can form two sub-segments which are connected with each other on two sides of the through-hole HL. The two sub-segments enables at least one of the first sub-segment41, the second sub-segment42or the third sub-segment43to have a certain elastic recovery force, thereby improving the strength of the conductive part4.

In some embodiments, a thickness of the conductive part4is larger than a thickness of at least one of the first electric-conducting part11or the second electric-conducting part21.

The “thickness of the conductive part4” mentioned in the embodiments of the present application refers to a size of the conductive part4in the thickness direction of the array substrate. Similarly, the thicknesses of the first electric-conducting part11and the second electric-conducting part21refer to sizes of the first electric-conducting part11and the second electric-conducting part21in the thickness direction of the array substrate, respectively.

Generally, the thickness of the wiring is positively correlated with the strength of the wiring itself. Therefore, the larger the thickness of the conductive part4is, the stronger the strength of the conductive part4is, and the lower the risk of fracture is. On this basis, in the embodiments of the present application, the thickness of the conductive part4is larger than at least one of the first electric-conducting part11or the second electric-conducting part21, thereby reducing the risk of fracture of the conductive part4during the module operation and improving the product yield. Optionally, the thickness of the conductive part4is larger than the thickness of the first electric-conducting part11and the thickness of the second electric-conducting part21.

In addition, generally, the thickness of the wiring is negatively correlated with the electric resistance of the wiring itself. Therefore, the electric resistance of the conductive part4can be reduced by increasing the thickness of the wiring, thereby reducing the loss of the current and voltage at the conductive part4, and improving the signal transmission effect of the first electric-conducting part11and the second electric-conducting part21.

In some embodiments, the thickness of the conductive part4is H1, the thickness of the first electric-conducting part11is H2, and H1 and H2 satisfy: 1000 Å≤H1−H2≤3000 Å.

It can be seen from the above content, by increasing the thickness of the conductive part4, the strength of the conductive part4can be improved and the electric resistance of the conductive part4can be reduced. However, if the thickness of the conductive part4is almost the same as that of the first electric-conducting part11, it indicates that the enhancement effect on the strength of the conductive part4is insufficient; if the thickness deviation between the conductive part4and the first electric-conducting part11is too large, it is easy to cause an excessive thickness of the film layer at the position of the conductive part4, which is not conducive to the manufacture of the display panel.

Therefore, in the embodiments of the present application, the thickness difference H1-H2 between the conductive part4and the first electric-conducting part11is set between 1000 Å and 3000 Å, thereby improving the strength of the conductive part4and avoiding the excessive thickness of the film layer at the position of the conductive part4. Exemplarily, the thickness difference H1−H2 between the conductive part4and the first electric-conducting part11may be 1000 Å, 1500 Å, 2000 Å, 2500 Å or 3000 Å.

In some optional embodiments, the thickness of the second electric-conducting part21is H3, and H1 and H3 satisfy: 1000 Å≤H1−H3≤3000 Å. Exemplarily, the thickness difference H1−H3 between the conductive part4and the second electric-conducting part21may be 1000 Å, 1500 Å, 2000 Å, 2500 Å or 3000 Å. Furthermore, the thickness H2 of the first electric-conducting part11may be the same as the thickness H3 of the second electric-conducting part21.

In some embodiments, referring toFIG.3andFIG.9, a connecting end between the bending body31and the first external expansion segment322is recessed in a direction towards the first body1to form at least one groove structure5.

The connecting end between the bending body31and the first external expansion segment322is located on at least one side of the bending part3in the second direction Y. During the module operation, the connecting end between the bending body31and the first external expansion segment322is a position that is most prone to the stress concentration in the array substrate.

In the embodiments of the present application, the groove structure5is arranged at the position and formed by recessing in the direction towards the first body1. The embodiments of the present application do not limit the specific shape of the groove structure5. Exemplarily, the groove structure5is an arc-shaped groove structure. The embodiments of the present application do not limit the specific concave direction of the groove structure5. Exemplarily, the concave direction of groove structure5is set at a 45° angle with the first direction X.

To some extent, the groove structure5can disperse the stress at the connecting end between the bending body31and the first external expansion segment322, thereby reducing the risk of crack. If the crack occurs, the groove structure5can also reduce the risk of the crack spreading towards the first body1, thereby effectively preventing the wiring breakage and ensuring that the display region of the display panel can normally display.

In some embodiments, there are two groove structures5symmetrically distributed on two sides of the bending part3in the second direction Y.

Generally, there are two connecting ends between the bending body31and the first external expansion segment322, which are located on two sides of the bending part3in the second direction Y. In this case, in the embodiments of the present application, there are two groove structures5correspondingly, and the two groove structures5are symmetrically distributed on two sides of the bending part3in the second direction Y, that is, the two groove structures5are arranged on the two connecting ends between the bending body31and the first external expansion segment322, respectively.

In this design, the two groove structures5can better disperse the stress, reduce the risk of crack on the array substrate, and improve the manufacturing reliability and the product yield.

In some embodiments, referring toFIG.10andFIG.11, the maximum width of the bending part3in the second direction Y is not larger than a minimum width of the second body2in the second direction Y, the bending part3further includes a second connecting part33arranged on a side of the bending body31near the second body2, the second connecting part33includes a second connecting segment331and at least one second external expansion segment332located on at least one side of the second connecting segment331in the second direction Y, the bending body31is connected to the second body2through the second connecting segment331, and in the first direction X, two ends of the bending body31in the second direction Y are flush with two ends of the second connecting segment331in the second direction Y, respectively.

The maximum width of the bending part3in the second direction Y is not larger than the minimum width of the second body2in the second direction Y. The embodiments of the present application do not limit the contour and shape of the second body2. Exemplarily, in a direction where the second body2is away from the bending region, the width of the second body2in the second direction Y gradually increases firstly, and then remains unchanged. In this case, optionally, at least a portion of the second electric-conducting part21extends along the outer contour of the second body2, that is, the portion of the second electric-conducting part21used to connect the conductive part4is the fan-out structure, so as to increase a distance between two second electric-conducting parts21in the second direction.

The width of the array substrate in the second direction Y is rapidly changed not only at the connection between the bending part3and the first body1, but also at the connection between the bending part3and the second body2. Under the influence of uneven force on the array substrate, it is prone to the stress concentration at the connection between the bending part3and the second body2.

Therefore, in the embodiments of the present application, in addition to the first external expansion segment322, at least one second external expansion segment332is also provided. At least one second external expansion segment332is located on at least one side of the second connecting segment331in the second direction Y, thereby increasing the strength of an end of the second connecting segment331in the second direction Y. Due to the certain size of the second external expansion segment332, the stress and strength can be dispersed at the position of the end, thereby reducing the risk of stress concentration at the position of the end. Optionally, there are two second external expansion segments332, which are located on two sides of the second connecting segment331in the second direction Y, respectively.

In some embodiments, referring toFIG.1andFIG.3, the first body1is a circular structure, a diameter of the circular structure is L1, a width of the bending body31in the second direction Y is L2, and L1 and L2 satisfy: 10%≤L2/L1≤30%.

The first body1is the circular structure and is suitable for a wearable display product, such as an electronic watch. The width L2 of the bending body31in the second direction Y is equivalent to a corresponding diameter of the bending part3at a mounting position on the first body1. When L2/L1 is too small, it indicates that the width change of the array substrate at the connection between the bending part3and the first body1is too significant, which is not conducive to wiring arrangement. In addition, it is prone to the stress concentration during the module operation. When L2/L1 is too large, it indicates that the bending part3occupies too much space relative to the first body1, which may result in too small size of the first body1, and be not conducive to the display effect of the display panel.

Therefore, in the embodiments of the present application, L2/L1 is set between 10% and 30% to increase the displayable area of the display panel while meeting the manufacturing needs of the array substrate, thereby improving the using experience of the user. Exemplarily, L2/L1 may be 10%, 15%, 20%, 25% or 30%.

In a second aspect, referring toFIG.12, embodiments of the present application provide a display panel including the array substrate according to any one of the aforementioned embodiments and a light-emitting member layer6. An orthographic projection of the light-emitting member layer6on the array substrate is located within the first body1.

In the display panel, the second body2in the array substrate needs to be bent to a side of the first body1in the thickness direction through the bending part3. The light-emitting member layer6is located on the array substrate and includes a plurality of light-emitting units for achieving the light-emitting effect. The plurality of light-emitting units include but are not limited to red light-emitting units, green light-emitting units and blue light-emitting units. The light-emitting member layer6merely needs to be arranged within the display region of the display panel, thus, the orthographic projection of the light-emitting member layer6on the array substrate can be located within the first body1.

It should be noted that, in addition to the light-emitting member layer and the array substrate, the display panel further includes other functional film layers. The embodiments of the present application do not limit the types and the number of other functional film layers. In addition, the display panel provided by the embodiments of the present application can have the beneficial effect of the array substrate according to any one of the aforementioned embodiments. Referring to the description of the array substrate mentioned above for details, and the embodiments of the present application will not be repeated.

In a third aspect, referring toFIG.13, embodiments of the present application provide a display device, including the display panel according to any one of the aforementioned embodiments.

The display device provided by the embodiments of the present application can be applicable to various display devices, such as a wearable display device. The embodiments of the present application do not limit the specific application scenarios of the display device. Of course, the display device provided by the embodiments of the present application can be applicable to any other type of display device, which is not specifically limited.

Although the present application has been described with reference to the embodiments, various modifications may be made and equivalents may be substituted for parts of the embodiments without departing from the scope of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in the embodiments can be combined in any manner. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.