Display panel, display panel driving method and display device

Abstract

The present invention discloses a display panel, a display panel driving method and a display device. The display panel has a functional component area, a display area at least partially arranged around the functional component area, a first non-display area arranged between the functional component area and the display area, and a second non-display area at least partially arranged around the display area. The display panel includes: a touch electrode layer, the touch electrode layer includes a plurality of touch electrode blocks; a touch signal line, the touch signal line is correspondingly connected to the touch electrode blocks, at least one of the plurality of touch signal lines is reused as a crack detection line, the crack detection line is at least partially located in the first non-display area and is arranged around the functional component area. By reusing the touch signal line as a crack detection line, the touch function and the crack detection function of the display panel are realized at the same time, avoiding the additional arrangement of a routing line for crack detection, reducing the influence of the crack detection line on the touch signal, and improving the integration and space utilization of the display panel.

Description

Technical Field

[0001] The present invention belongs to the technical field of electronic products, and in particular relates to a display panel, a display panel driving method and a display device. Background Art

[0002] In order to achieve a larger screen-to-body ratio, some display panels use in-screen hole-digging technology, that is, a hole-digging area for placing hardware such as a front camera is set in the effective display area. For example, a hole is cut in the display panel to place a camera or other device originally located in the frame area in the hole, thereby achieving the purpose of compressing the frame. However, when cutting a hole in the display panel, a cutting crack will appear at the edge of the hole, and the crack will extend to the display area and affect the display effect of the display panel.

[0003] Therefore, a new display panel, a display panel driving method and a display device are urgently needed. Summary of the invention

[0004] Embodiments of the present invention provide a display panel, a display panel driving method and a display device, which realize the touch function and crack detection function of the display panel by multiplexing the touch signal line as a crack detection line, avoid the additional setting of the routing for crack detection, reduce the influence of the crack detection line on the touch signal, and improve the integration and space utilization of the display panel.

[0005] In a first aspect, an embodiment of the present invention provides a display panel, comprising a functional component area, a display area at least partially arranged around the functional component area, a first non-display area arranged between the functional component area and the display area, and a second non-display area at least partially arranged around the display area, the display panel comprising: a touch electrode layer, the touch electrode layer comprising a plurality of touch electrode blocks; a touch signal line, the touch signal line being correspondingly connected to the touch electrode blocks, at least one of the plurality of touch signal lines being multiplexed as a crack detection line, the crack detection line being at least partially located in the first non-display area and arranged around the functional component area.

[0006] In the second aspect, an embodiment of the present invention provides a display panel driving method, comprising: sending a touch signal to the touch electrode block through a touch signal line in a touch stage; sending a crack detection signal to the touch electrode block and receiving a feedback signal through a crack detection line multiplexed in the touch signal line in a crack detection stage; when the difference between the feedback signal and the reference signal value exceeds an error range, outputting a warning signal.

[0007] In a third aspect, an embodiment of the present invention provides a display device, comprising: a display panel, wherein the display panel is the display panel described in any of the above embodiments.

[0008] Compared with the related art, the display panel provided by the embodiment of the present invention includes a touch electrode layer and a touch signal line, and the touch signal line is used to transmit the touch signal to each touch electrode block to realize the touch function of the display panel. At the same time, at least one of the multiple touch signal lines is reused as a crack detection line, and the crack detection line is at least partially located in the first non-display area and arranged around the functional component area. When a crack occurs in the functional component area, the crack detection line will be damaged or even broken due to the crack, causing the resistance of the crack detection line to change, thereby causing a signal transmission problem. By detecting the signal transmitted by the crack detection line or the capacitance change of the touch electrode block connected to the crack detection line, it can be determined whether a crack occurs, and crack defective products can be effectively screened out. The display panel provided by the embodiment of the present invention realizes the touch function and crack detection function of the display panel by reusing the touch signal line as the crack detection line, avoiding the additional arrangement of the routing for crack detection, reducing the influence of the crack detection line on the touch signal, and improving the integration and space utilization of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0010] Figure 1 is a schematic structural diagram of a display panel provided by an embodiment of the present invention;

[0011] Figure 2 yes Figure 1 A partial enlarged view of position B in the middle;

[0012] Figure 3 yes Figure 1 Another partial enlarged view of point B in the middle;

[0013] Figure 4 is a schematic structural diagram of another display panel provided by an embodiment of the present invention;

[0014] Figure 5 yes Figure 4 A partial enlarged view of the middle C;

[0015] Figure 6 yes Figure 4 Another partial enlarged view of the center C;

[0016] Figure 7 yes Figure 4 Another partial enlarged view of the center C;

[0017] Figure 8 is a structural schematic diagram of another display panel provided by an embodiment of the present invention;

[0018] Fig. 9 yes Figure 8 A partial enlarged view of D in the middle;

[0019] Fig.10 yes Figure 8 Another partial enlarged view of D in the middle;

[0020] Fig.11 yes Fig.10 The film structure diagram at EE in the middle;

[0021] Fig.12 is a schematic structural diagram of a first touch electrode provided by an embodiment of the present invention;

[0022] Fig.13 is a flow chart of a display panel driving method provided by an embodiment of the present invention;

[0023] Fig.14 It is a structural schematic diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0024] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention.

[0025] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0026] It is obvious to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention. Therefore, the present invention is intended to cover modifications and variations of the present invention that fall within the scope of the corresponding claims (technical solutions claimed for protection) and their equivalents. It should be noted that the implementation methods provided in the embodiments of the present invention can be combined with each other without contradiction.

[0027] The display panel provided in the embodiment of the present invention may be an organic light-emitting diode (OLED) display panel, a liquid crystal panel, or a micro flat panel display panel (Micro-OLED or Micro-LED), etc.

[0028] In order to better understand the present invention, Figures 1 to 14 A display panel, a display panel driving method and a display device according to embodiments of the present invention are described in detail.

[0029] Please also read Figures 1 to 3 , Figure 1It is a structural schematic diagram of a display panel provided by an embodiment of the present invention. The embodiment of the present invention provides a display panel, comprising a functional component area TA, a display area AA at least partially arranged around the functional component area TA, a first non-display area NA1 arranged between the functional component area TA and the display area AA, and a second non-display area NA2 at least partially arranged around the display area AA, the display panel comprising: a touch electrode layer, the touch electrode layer comprising a plurality of touch electrode blocks 1; a touch signal line 2, the touch signal line 2 is correspondingly connected to the touch electrode blocks 1, at least one of the plurality of touch signal lines 2 is multiplexed as a crack detection line 3, the crack detection line 3 is at least partially located in the first non-display area NA1 and arranged around the functional component area TA. The display panel provided by the embodiment of the present invention includes a touch electrode layer and a touch signal line 2. The touch signal is transmitted to each touch electrode block 1 through the touch signal line 2 to realize the touch function of the display panel. At the same time, at least one of the multiple touch signal lines 2 is reused as a crack detection line 3, and the crack detection line 3 is at least partially located in the first non-display area NA1 and is arranged around the functional component area TA. When a crack occurs in the functional component area TA, the crack detection line 3 will be damaged or even broken due to the crack, causing the resistance of the crack detection line 3 to change, thereby causing signal transmission problems. By detecting parameters such as the signal transmitted by the crack detection line 3 or the capacitance change of the touch electrode block 1 connected to the crack detection line 3, it can be determined whether a crack occurs, and defective cracked products can be effectively screened out. The display panel provided in the embodiment of the present invention realizes the touch function and crack detection function of the display panel by multiplexing the touch signal line 2 as the crack detection line 3, avoids the additional setting of the routing for crack detection, reduces the influence of the crack detection line 3 on the touch signal, and improves the integration and space utilization of the display panel.

[0030] It can be understood that the display area AA is at least partially arranged around the functional component area TA, and the functional component area TA is a hollow area or a hole area, and the touch electrode layer and at least part of the display device layer 9 can be hollowed out. Specifically, the display device layer 9 includes an encapsulation layer, a light-emitting layer and an array layer stacked along the thickness direction of the display panel, and the hollow hole at least hollows out the inorganic film layer in the encapsulation layer, the light-emitting layer and the array layer in the functional component area TA, such as a gate insulating layer, etc., to improve the transmittance of the functional component area TA. The hollow hole can extend to the substrate 8, and the substrate 8 can use transparent PI (Polyimide Film) to further improve the transmittance of the functional component area TA. The hollow hole can also open up the substrate 8 to facilitate the setting of optical elements such as cameras, fingerprint recognition sensors, etc. in the corresponding functional component area TA.

[0031] The display area AA can be arranged around the entire functional component area TA, or can be arranged around part of the functional component area TA to form a Notch display screen, i.e., a bangs screen or a water drop screen, etc. It should be noted that, in some optional embodiments, the functional component area TA can also be a high-transmittance display area AA including a display element.

[0032] Optionally, the crack detection line 3 may be partially arranged around the functional component area TA, or may be completely arranged around the functional component area TA. When the crack detection line 3 is arranged around the entire functional component area TA, it can detect whether cracks occur in the functional component area TA in all directions, thereby effectively improving the crack detection range.

[0033] In some other optional embodiments of the present application, the touch signal line 2 is a connection line connecting two touch electrode blocks 1 so as to electrically connect the two touch electrode blocks 1 separated by the functional component area TA. Optionally, the touch structure is a mutual capacitance touch structure (not shown in the figure), the touch electrode block 1 includes touch driving electrodes and touch sensing electrodes that are insulated from each other, the control chip 6 sends a touch driving signal to the touch driving electrode in the touch electrode block 1 through a touch signal line 2, and transmits the touch sensing signal generated by the touch sensing electrode that forms a mutual capacitance electrode pair with the touch driving electrode back to the control chip 6 through another touch signal line 2. Since the touch driving electrodes located in the same row or column need to be electrically connected, and the touch sensing electrodes located in the same row or column need to be electrically connected, when the touch driving electrodes in the same row or column are separated into two touch driving electrodes by the functional component area TA, or when the touch sensing electrodes in the same row or column are separated into two touch sensing electrodes by the functional component area TA, the touch signal line 2 can be used as a connecting line to connect the two separated touch driving electrodes or touch sensing electrodes.

[0034] In a mutual capacitance touch structure, the touch position is determined by detecting the capacitance change between the touch drive electrode and the touch sensing electrode. The touch signal line 2 electrically connected to the touch sensing electrode or the touch signal line 2 electrically connected to the touch sensing drive can be reused as a crack detection line 3 to improve the integration of the display panel. When the touch structure is a mutual capacitance touch structure, the touch electrode block 1 and the touch signal line 2 are arranged in layers, an insulating layer is arranged between the touch electrode block 1 and the touch signal line 2, and the touch signal line 2 is electrically connected to the touch electrode block 1 through a via.

[0035] In some other optional embodiments of the present application, optionally, the touch signal lines 2 are connected to the touch electrode blocks 1 in a one-to-one correspondence.

[0036] Optional, such as Figure 1As shown, the touch structure is a self-capacitive touch structure, that is, each touch electrode block 1 is connected to a control module, such as a control chip 6, through a touch signal line 2. The touch signal line 2 is used to send a touch drive signal from the control chip 6 to each touch electrode block 1, and transmit a touch sensing signal generated by the touch electrode block 1 back to the control chip 6 through the same touch signal line 2.

[0037] In the self-capacitive touch structure, the touch signal line 2 and the touch electrode block 1 are arranged on the same layer. The inventor's research found that due to the design of the touch signal line 2 and the touch electrode layer being arranged on the same layer, the touch signal line 2 needs to use the intervals between the touch electrode blocks 1 for routing. However, due to the obstruction of the functional component area TA, there will be a problem that the routing of the touch signal line 2 of some touch electrode blocks 1 requires space setting.

[0038] In an embodiment of the present invention, by multiplexing the touch signal line 2 as the crack detection line 3, the crack detection line 3 can be extended to the first non-display area NA1, bypassing the functional component area TA and the control chip 6 for electrical connection, thereby solving the line outlet problem of this part of the touch signal line 2 while realizing the crack detection function of the display panel.

[0039] On the other hand, due to the different sensing methods, the touch signal line 2 multiplexed as the crack detection line 3 between the touch electrode blocks 1 in the self-capacitive touch structure has little effect on touch detection. Because the self-capacitive touch structure does not detect the touch position through the change of the fringe electric field between the touch drive electrode and the touch sensing electrode, the signal line set in the interval between the electrode blocks to transmit the signal to the crack detection line 3 can reduce the influence on the touch electrode, so it will not affect the accuracy of the touch detection of the display panel. At the same time, while taking into account the touch and crack detection functions, the number of conductive layers can be reduced to achieve a thin display panel.

[0040] Of course, in some other optional embodiments of the present application, the touch electrode block 1 is made of an opaque metal with low resistivity, such as copper, aluminum, etc., to ensure the touch effect.

[0041] See also Figures 1 to 3 In order to reduce the routing distance of the touch signal line 2 multiplexed as the crack detection line 3 and avoid interference between the touch signal line 2 multiplexed as the crack detection line 3 and other touch signal lines 2, in some optional embodiments, the touch electrode block 1 includes a plurality of first touch electrode blocks 11, at least one edge of the first touch electrode block 11 is arranged adjacent to the functional component area TA, and at least one touch signal line 2 among the touch signal lines 2 electrically connected to the first touch electrode block 11 is multiplexed as the crack detection line 3.

[0042] It can be understood that the first touch electrode block 11, that is, the touch electrode block 1 adjacent to the functional component area TA, is closer to the functional component area TA than other touch electrode blocks 1. The touch signal line 2 extending from the first touch electrode block 11 can directly enter the first non-display area NA1 to be arranged around the functional component area TA without passing through other touch electrode blocks 1, thereby effectively avoiding interference between the crack detection line 3 and other touch electrode blocks 1 or touch signal lines 2, and facilitating routing.

[0043] See also Figure 1 In order to realize the crack detection function of the display panel, the display panel also includes a crack detection circuit, which includes a crack detection unit 5 and a crack detection line 3 electrically connected to the crack detection unit 5, and the crack detection unit 5 is arranged in the second non-display area NA2.

[0044] It is understandable that when the crack detection line 3 is damaged by a crack, its resistance will change, which will cause the voltage signal or current signal transmitted by the crack detection line 3 to change. The crack detection unit 5 can synchronously detect the signal change of the crack detection line 3, and then determine whether the functional component area TA of the display panel has cracks, and effectively screen out defective products with cracks. In order to prevent the crack detection unit 5 from affecting the normal display of the display panel, the crack detection unit 5 is set in the second non-display area NA2, and the crack detection unit 5 can be a detection pad or other detection circuits that can detect parameters such as capacitance and voltage.

[0045] The inventors' research found that due to the design of the touch signal line 2 and the touch electrode layer being arranged on the same layer, the touch signal line 2 needs to be routed using the gaps between the touch electrode blocks 1. However, due to the obstruction of the functional component area TA, the touch signal line 2 of some first touch electrode blocks 11 may be difficult to route.

[0046] See also Figure 1 and Figure 2 In order to solve the above problem, in an embodiment provided by the present invention, the display panel also includes a control chip 6, the control chip 6 is located on one side of the first direction Y of the functional component area TA, and each touch signal line 2 is electrically connected to the control chip 6. In the first direction Y, the multiple first touch electrode blocks 11 include a first A touch electrode block 111 arranged on the side of the functional component area TA away from the control chip 6, and the crack detection line 3 reuses the touch signal line 2 connected to the first A touch electrode block 111.

[0047] It should be noted that the control chip 6 is used to send touch signals to the touch electrode block 1 through each touch signal line 2. The crack detection unit 5 can be integrated into the control chip 6 to reduce the occupied space and improve the integration of the display panel. The crack detection unit 5 can also be set separately to avoid interference with the touch signal. Since the first A touch electrode block 111 is arranged on the side of the functional component area TA away from the control chip 6, the connection between the touch signal line 2 electrically connected to the first A touch electrode block 111 and the control chip 6 is hindered by the functional component area TA. Therefore, the touch signal line 2 electrically connected to the first A touch electrode block 111 is reused as a crack detection line 3. The crack detection line 3 can extend to the first non-display area NA1, bypass the functional component area TA and be electrically connected to the control chip 6, thereby solving the line outlet problem of the first A touch electrode block 111 while realizing the crack detection function of the display panel.

[0048] Optionally, the control chip 6 can be used to implement the crack detection function of the display panel without the need to additionally set up a crack detection unit 5. Specifically, the control chip 6 can determine whether a crack has occurred by detecting a change in the capacitance of the touch electrode block 1 connected to the crack detection line 3. For example, when the difference between the current voltage value of the touch electrode block 1 received by the control chip 6 and the preset value is greater than the maximum deviation value, it is determined that a crack has occurred.

[0049] Since the first A touch electrode block 111 is arranged on the side of the functional component area TA away from the control chip 6, when a crack detection line 3 is used, the crack detection line 3 needs to be arranged more than one circle around the functional component area TA so that the crack detection line 3 can reach the outlet position, which increases the routing length of the crack detection line 3, affects the transmission of the touch signal, and further affects the uniformity of the touch. In order to avoid the above problems, optionally, two touch signal lines 2 electrically connected to the first A touch electrode block 111 reuse the crack detection line 3, and the two crack detection lines 3 are symmetrically distributed about the functional component area TA in the second direction X, so that the two crack detection lines 3 form a complete ring structure arranged around the entire functional component area TA, thereby improving the detection range of cracks, wherein the second direction X is perpendicular to the first direction Y. Of course, more touch signal lines 2 electrically connected to the first A touch electrode block 111 can also be used to reuse the crack detection line 3, without special limitations.

[0050] See also Figure 1 and Figure 3In order to further improve the touch uniformity of the display panel, in some optional embodiments, the display panel also includes a control chip 6, which is located on one side of the first direction Y of the functional component area TA, and each touch signal line 2 is electrically connected to the control chip 6. In the first direction Y, the multiple first touch electrode blocks 11 include a first B touch electrode block 112 located on one side of the functional component area TA close to the control chip 6, and the crack detection line 3 reuses the touch signal line 2 connected to the first B touch electrode block 112.

[0051] It can be understood that the first B touch electrode block 112 is arranged on the side of the functional component area TA close to the control chip 6, that is, the first B touch electrode block 112 is relatively close to the control chip 6. If the touch signal line 2 of the first B touch electrode block 112 extends directly toward the control chip 6 and is connected to the control chip 6, then the touch signal line 2 will be shorter than the touch signal line 2 of other first touch electrode blocks 11. Multiplexing the touch signal line 2 electrically connected to the first B touch electrode block 112 as the crack detection line 3 can effectively compensate for the signal loading caused by the difference in routing length, thereby improving the touch uniformity of the display panel.

[0052] See also Figures 1 to 3 In some optional embodiments, when the number of first touch electrode blocks 11 is less than or equal to 4, one touch signal line 2 among the multiple touch signal lines 2 is multiplexed as a crack detection line 3. Specifically, when the size area of ​​the functional component area TA is relatively small, the number of first touch electrode blocks 11 surrounding the functional component area TA is also reduced accordingly, and the outer edge circumference of the functional component area TA is relatively small, so the required winding length of the crack detection line 3 is relatively small, and the crack detection function can be achieved by only one touch signal line 2.

[0053] See also Figures 4 to 11 Optionally, when the number of touch electrode blocks 1 adjacent to the functional component area TA is greater than 4, at least two touch signal lines 2 among the plurality of touch signal lines 2 are multiplexed as crack detection lines 3. Since the number of first touch electrode blocks 11 is relatively large, the size and area of ​​the functional component area TA surrounded by them is relatively large, and thus a plurality of crack detection lines 3 may be arranged to cooperate with each other to surround the entire functional component area TA, thereby ensuring the crack detection range.

[0054] See also Figure 2 and Figure 3 Since when a crack detection line 3 is used, the entry position and exit position of the crack detection line 3 in the first non-display area NA1 are usually not at the same position, in order to make the crack detection line 3 surround the entire functional component area TA and ensure the crack detection range, in some optional embodiments, a crack detection line 3 surrounds at least twice in the direction F radiating from the center of the functional component area TA to the display area AA.

[0055] It should be noted that "surrounded by at least two circles" does not mean two completely closed rings, but a non-closed circle. Specifically, in a part of the outer periphery of the functional component area TA, a crack detection line 3 is surrounded by two circles, and not the entire outer periphery of the functional component area TA is surrounded by at least two circles of the crack detection line 3.

[0056] See also Figure 5 When multiple crack detection lines 3 are used, in order to avoid mutual interference among the crack detection lines 3 and affect the accuracy of crack position detection, in some optional embodiments, at least two touch signal lines 2 among the multiple touch signal lines 2 are multiplexed as crack detection lines 3, and two adjacent crack detection lines 3 do not overlap in the direction F radiating from the center of the functional component area TA to the display area AA.

[0057] It can be understood that two adjacent crack detection lines 3 do not overlap in the direction F radiating from the center of the functional component area TA to the display area AA, which specifically means that each crack detection line 3 is respectively arranged around a part of the functional component area TA without interfering with each other. Each crack detection line 3 respectively realizes crack detection in a part of the functional component area TA. When a crack occurs in the functional component area TA, the crack location can be roughly determined based on which crack detection line 3 detects the crack, thereby improving the crack detection efficiency.

[0058] See also Figure 6 In some optional embodiments, the number of the crack detection lines 3 is greater than or equal to two, and the crack detection lines 3 are distributed in a centrally symmetrical manner about the functional component area TA.

[0059] The number of crack detection lines 3 can be an even number or an odd number. When the number of crack detection lines 3 is an even number such as two or four, each crack detection line 3 is centrally symmetrically distributed about the functional component area TA. When the number of crack detection lines 3 is an odd number such as three or five, the overall pattern formed by each crack detection line 3 is centrally symmetrically distributed about the functional component area TA. The centrally symmetrical distribution of the crack detection lines 3 about the functional component area TA can effectively avoid interference between each other, and can roughly determine the crack location based on which crack detection line 3 detects the crack, thereby improving the crack detection efficiency.

[0060] See also Figures 5 to 7 In some optional embodiments, the first non-display area NA1 is provided with a dam portion 7 arranged around the functional component area TA, and the crack detection line 3 is at least partially located between the dam portion 7 and the functional component area TA.

[0061] It should be noted that, since external water vapor can easily enter the display panel through the functional component area TA, corroding other components of the display panel and affecting the service life of the display panel, a dam portion 7 is provided around the functional component area TA in this embodiment. The dam portion 7 is used to block water and oxygen from entering the display area AA of the display panel. The touch signal line 2 multiplexed as the crack detection line 3 needs to cross the dam portion 7 and enter the area between the dam portion 7 and the functional component area TA, so that the crack detection line 3 is closer to the functional component area TA, thereby improving the sensitivity of crack detection and ensuring the accuracy of crack detection.

[0062] See also Figure 7 In order to reduce the risk of breaking of the crack detection line 3, in some optional embodiments, the crack detection line 3 includes a first detection section 31, a second detection section 32 and a third detection section 33 which are interconnected; the first detection section 31 is arranged on the side of the dam portion 7 away from the functional component area TA, and the first detection section 31 is partially tangent to the outer edge of the dam portion 7, the second detection section 32 passes through the dam portion 7, and the third detection section 33 is arranged on the side of the dam portion 7 close to the functional component area TA, and the third detection section 33 is partially tangent to the inner edge of the dam portion 7.

[0063] It can be understood that the first detection section 31 is a portion of the crack detection line 3 located between the touch electrode block 1 and the dam portion 7. One end of the first detection section 31 extends from the touch electrode block 1, and the other end is partially tangent to the outer edge of the dam portion 7 to avoid entering the dam portion 7 in a direction perpendicular to the outer edge of the dam portion 7. The second detection section 32 crosses the dam portion 7, and the third detection section 33 is a portion of the crack detection line 3 located between the dam portion 7 and the functional component area TA. The third detection section 33 is partially tangent to the inner edge of the dam portion 7, and the second detection section 32 extends along the inner edge of the dam portion 7 to form the third detection section 33, which effectively reduces the bending angle of the crack detection line 3, reduces the risk of breaking the crack detection line 3, and ensures the crack detection effect of the display panel.

[0064] Since the second detection section 32 needs to cross the dam portion 7, and the membrane layer with a step difference across the dam portion 7 needs to adopt a routing method such as climbing, the risk of disconnection is relatively large. In order to avoid disconnection of the second detection section 32, in some optional embodiments, the line width of the second detection section 32 is greater than the line width of the first detection section 31 and the third detection section 33. It can be understood that setting the routing width of the second detection section 32 larger can effectively increase the strength of the second detection section 32 and reduce the possibility of disconnection of the second detection section 32.

[0065] See also Figure 8Due to the influence of the functional component area TA, the first touch electrode block 11 will be missing a part compared with other touch electrode blocks 1, which affects the size of the touch capacitance. In order to compensate for this part of the touch capacitance, in some optional embodiments, the display panel also includes a plurality of touch compensation blocks 4 arranged at intervals between the dam portion 7 and the first touch electrode block 11, and each touch compensation block 4 is electrically connected to an adjacent first touch electrode block 11, respectively.

[0066] It can be understood that each touch compensation block 4 is electrically connected to the adjacent first touch electrode block 11 respectively to compensate for the partial touch capacitance missing from the adjacent first touch electrode block 11. The touch compensation blocks 4 are arranged at intervals to avoid signal interference between each other and affecting the touch performance. The size and area of ​​each touch compensation block 4 do not need to be the same and can be adjusted according to the size of the touch capacitance missing from each first touch electrode block 11.

[0067] See also Fig. 9 In some optional embodiments, at least one touch signal line 2 extends toward the functional component area TA through the spaces between the touch compensation blocks 4 to form a crack detection line 3. Since the touch signal line 2 and the touch compensation blocks 4 are arranged on the same layer, the touch signal line 2 needs to use the spaces between the touch compensation blocks 4 to be routed into the first non-display area NA1 to form a crack detection line 3, so as to avoid contact between the touch signal line 2 and different touch compensation blocks 4, thereby causing signal interference and affecting crack detection and touch functions.

[0068] See also Fig.10 In order to prevent the touch signal line 2 from contacting the touch compensation blocks 4 when passing through the intervals between the touch compensation blocks 4, in some optional embodiments, at least one touch signal line 2 extends from the touch compensation block 4 toward the functional component area TA to form a crack detection line 3.

[0069] Since each touch compensation block 4 is electrically connected to the adjacent first touch electrode block 11, the touch signal line 2 can also send a touch signal to the first touch electrode block 11 through the touch compensation block 4, that is, the touch compensation block 4 and the first touch electrode block 11 that are electrically connected to each other receive the same touch signal, and at least one touch signal line 2 extends from the touch compensation block 4 toward the functional component area TA to form a crack detection line 3, without passing through the intervals between the touch compensation blocks 4, thereby reducing the routing length and effectively avoiding interference between the touch signal line 2 and the touch compensation block 4.

[0070] Please continue reading Fig.10 In some optional embodiments, the touch compensation block 4 has a curved edge Q toward the functional component area TA, and at least one touch signal line 2 extends from the extension line of the curved edge Q toward the functional component area TA to form a crack detection line 3.

[0071] It can be understood that the crack detection line 3 extends in the direction of the extension line of the curved edge Q, which can effectively reduce the risk of the crack detection line 3 being broken at the outlet of the touch compensation block 4. Optionally, the curvature of the curved edge Q is the same as the curvature of the outer edge of the corresponding functional component area TA, ensuring the touchable area of ​​the touch compensation block 4 on the peripheral side of the functional component area TA.

[0072] See also Fig.11 In order to compensate the touch capacitance of each first touch electrode block 11 as much as possible within a limited space, in some optional embodiments, each first touch electrode block 11 is in a mesh structure, and the touch compensation block 4 is in a whole block shape.

[0073] It can be understood that the first touch electrode block 11 with a mesh structure has an area smaller than the touch compensation block 4 of the same size in a block shape due to the openings provided between the meshes. The block shape has a complete touch surface without openings, and the touch compensation block 4 in a block shape can compensate for a larger touch capacitance while occupying the same space. Optionally, when the area of ​​the first touch electrode block 11 is largely missing, the touch compensation block 4 in a block shape can be used to compensate for it. When the area of ​​the first touch electrode block 11 is largely missing, the touch compensation block 4 in a mesh structure can be used to compensate for it. Optionally, the display panel also includes a substrate 8 and a display device layer 9 provided on one side of the substrate, and the first touch electrode block 11 and the touch compensation block 4 are provided on the light emitting side of the display device layer 9.

[0074] In some optional embodiments, the touch electrode block 1 is a metal grid, and the touch compensation block 4 is specifically a solid surface. The solid surface touch compensation block 4 has a larger touch surface and can generate a larger touch capacitance. The touch compensation block 4 is arranged on the same layer as the touch electrode block 1 to facilitate electrical connection between the touch compensation block 4 and the corresponding touch electrode block 1 to achieve touch capacitance compensation.

[0075] Optionally, when the crack detection line 3 is directly led out from the first touch electrode block 11 which is a metal grid, since the touch compensation block 4 is arranged on the same layer as the touch electrode block 1, it is necessary to set a gap in the touch compensation block 4 corresponding to the first touch electrode block 11 to avoid the crack detection line 3 so that the crack detection line 3 can pass through and extend to the first non-display area NA1.

[0076] Optionally, the touch compensation block 4 is located in the first non-display area NA1 to compensate the electrode block while avoiding the problem of pattern visibility.

[0077] See also Fig.12In order to further perform touch capacitance compensation on the first touch electrode block 11, in some optional embodiments, the display panel also includes second touch electrode blocks 12 arranged around the first touch electrode blocks 11, and in a direction perpendicular to the plane where the touch electrode layer is located, the projection areas of the second touch electrode blocks 12 are equal, and the projection areas of the second touch electrode blocks 12 are larger than the projection areas of the first touch electrode blocks 11; the multiple first touch electrode blocks 11 include one or several first touch electrode blocks 11 having the largest difference in projection area with the second touch electrode blocks 12, and the touch signal lines 2 connected to the one or several first touch electrode blocks 11 are reused as crack detection lines 3.

[0078] It should be noted that, since the first touch electrode block 11 needs to be arranged around the functional component area TA, the first touch electrode block 11 will be missing a part compared to the second touch electrode to match the functional component area TA, and the projection area of ​​the second touch electrode block 12 is larger than the projection area of ​​each first touch electrode block 11, that is, the touch capacitance of each first touch electrode block 11 is smaller than the touch capacitance of the second touch electrode block 12. Since the crack detection line 3 is also a conductor and has a certain resistance, the crack detection line 3 can also perform touch capacitance compensation for the first touch electrode block 11. Specifically, one or more first touch electrode blocks 11 with the largest projection area difference between the first touch electrode block 12 and the second touch electrode block 12 can be selected from multiple first touch electrode blocks 11, that is, the touch signal line 2 connected to the first touch electrode block 11 with the largest area missing is reused as the crack detection line 3, so as to realize touch capacitance compensation for the first touch electrode block 11 while realizing crack detection.

[0079] In order to improve the accuracy of crack detection, in some optional embodiments, the functional component area TA has at least one curved edge, and the crack detection line 3 adjacent to the curved edge of the functional component area TA has an extension path that matches the curved edge. Optionally, when the functional component area TA is circular, the crack detection line 3 forms a circular ring structure to match the curved edge of the functional component area TA, and detects various positions where cracks may appear on the edge of the functional component area TA.

[0080] See also Fig.13 The embodiment of the present invention further provides a display panel driving method, comprising:

[0081] S110: sending a touch signal to the touch electrode block 1 via the touch signal line 2 during the touch stage;

[0082] S120: sending a crack detection signal to the touch electrode block 1 through the crack detection line 3 reused in the touch signal line 2 and receiving a feedback signal in the crack detection phase;

[0083] S130: When the difference between the feedback signal and the reference signal exceeds an error range, a warning signal is output.

[0084] In step S110, a touch signal may be sent to each touch electrode block 1 through the control chip 6 to realize the touch function of the display panel;

[0085] In step S120, the crack detection unit 5 integrated in the control chip 6 can send a crack detection signal to the touch electrode block 1 and receive a feedback signal. In order to simplify the signal sending step, the touch signal can also be multiplexed into a crack detection signal, that is, the touch signal of the touch electrode block 1 and the sensing signal fed back by the touch electrode block 1 are used to determine whether a crack occurs, without the need to send an additional crack detection signal.

[0086] In step S130, when the difference between the feedback signal and the reference signal value exceeds the error range, a warning signal is output. The error range can be selected according to actual conditions, and specifically can be a certain voltage value range or capacitance value range, etc.

[0087] The display panel driving method provided in the embodiment of the present invention realizes the touch function and crack detection function of the display panel by multiplexing part of the touch signal lines 2 as crack detection lines 3, avoids the additional setting of routing lines for crack detection, reduces the influence of the crack detection lines 3 on the touch signal, and improves the integration and space utilization of the display panel.

[0088] In some optional embodiments, the feedback signal includes a voltage value after the touch electrode block 1 receives the crack detection signal. When a crack occurs in the crack detection line 3, its own resistance will change, thereby affecting the voltage value of the touch electrode block 1 connected to the crack detection line 3. For example, when the crack detection line 3 is completely broken, that is, the crack detection line 3 and the touch electrode block 1 connected thereto are in an open circuit state, there is no feedback signal, which can also be understood as the feedback signal is zero, and a warning signal is output to remind the staff that a crack occurs on the display panel.

[0089] See also Fig.14 The present invention also provides a display device, including: a display panel 100, and the display panel 100 is the display panel in any of the above embodiments. Therefore, the display device provided in the embodiment of the present invention has the technical effect of the technical solution of the display panel in any of the above embodiments, and the explanation of the structure and terms that are the same or corresponding to the above embodiments will not be repeated here. The display device provided in the embodiment of the present invention can be a mobile phone, or any electronic product with a display function, including but not limited to the following categories: televisions, laptops, desktop displays, tablet computers, digital cameras, smart bracelets, smart glasses, car displays, medical equipment, industrial control equipment, touch interactive terminals, etc. The embodiment of the present invention does not specifically limit this.

[0090] The above is only a specific implementation of the present invention. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present invention is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be covered within the protection scope of the present invention.

[0091] It should also be noted that the exemplary embodiments mentioned in the present invention describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiments, or in a different order from the embodiments, or several steps can be performed simultaneously.

Claims

1. A display panel, characterized in that: The display panel has a functional component area, a display area at least partially surrounding the functional component area, a first non-display area between the functional component area and the display area, and a second non-display area at least partially surrounding the display area, the display panel comprising: A touch electrode layer, the touch electrode layer comprising a plurality of touch electrode blocks; a touch signal line, the touch signal line being connected to the touch electrode blocks correspondingly, at least two of the plurality of touch signal lines being multiplexed as a crack detection line, the crack detection line being at least partially located in the first non-display area and being arranged around the functional component area, and two adjacent crack detection lines not overlapping in a direction radiating from the center of the functional component area to the display area.

2. The display panel according to claim 1, characterized in that: The touch electrode block includes a plurality of first touch electrode blocks, at least one edge of the first touch electrode block is arranged adjacent to the functional component area, and at least two of the touch signal lines electrically connected to the first touch electrode block are multiplexed as the crack detection lines.

3. The display panel according to claim 2, characterized in that: The device further includes a crack detection circuit, wherein the crack detection circuit includes a crack detection unit and the crack detection line electrically connected to the crack detection unit, and the crack detection unit is disposed in the second non-display area.

4. The display panel according to claim 2, characterized in that: It also includes a control chip, which is located on one side of the first direction of the functional component area. Each of the touch signal lines is electrically connected to the control chip. In the first direction, the multiple first touch electrode blocks include a first A touch electrode block located on the side of the functional component area away from the control chip, and the crack detection line reuses the touch signal line connected to the first A touch electrode block.

5. The display panel according to claim 2, characterized in that: It also includes a control chip, which is located on one side of the first direction of the functional component area. Each of the touch signal lines is electrically connected to the control chip. In the first direction, the multiple first touch electrode blocks include a first B touch electrode block located on one side of the functional component area close to the control chip, and the crack detection line reuses the touch signal line connected to the first B touch electrode block.

6. The display panel according to claim 2, characterized in that: One of the crack detection lines circles at least twice in a direction radiating from the center of the functional component area toward the display area.

7. The display panel according to claim 2, characterized in that: The number of the crack detection lines is greater than or equal to two, and the crack detection lines are distributed symmetrically about the center of the functional component area.

8. The display panel according to claim 2, characterized in that: The first non-display area is provided with a dam portion arranged around the functional component area, and the crack detection line is at least partially located between the dam portion and the functional component area.

9. The display panel according to claim 8, characterized in that: The crack detection line comprises a first detection section, a second detection section and a third detection section which are connected to each other; The first detection section is arranged on the side of the dam portion away from the functional component area, and the first detection section is partially tangent to the outer edge of the dam portion. The second detection section passes through the dam portion. The third detection section is arranged on the side of the dam portion close to the functional component area, and the third detection section is partially tangent to the inner edge of the dam portion.

10. The display panel according to claim 9, characterized in that: The line width of the second detection segment is greater than the line width of the first detection segment and the third detection segment.

11. The display panel according to claim 8, characterized in that: The device further comprises a plurality of touch compensation blocks disposed at intervals between the dam portion and the first touch electrode block, wherein each of the touch compensation blocks is electrically connected to an adjacent first touch electrode block.

12. The display panel according to claim 11, characterized in that: At least one of the touch signal lines extends toward the functional component area through the spaces between the touch compensation blocks to form the crack detection line.

13. The display panel according to claim 11, characterized in that: At least one of the touch signal lines extends from the touch compensation block toward the functional component area to form the crack detection line.

14. The display panel according to claim 11, characterized in that: The touch compensation block has a curved edge facing the functional component area, and at least one touch signal line extends from an extension line of the curved edge toward the functional component area to form the crack detection line.

15. The display panel according to claim 11, characterized in that: Each of the first touch electrode blocks is in a mesh structure, and the touch compensation block is in a whole block shape.

16. The display panel according to claim 2, characterized in that: It also includes second touch electrode blocks arranged around the first touch electrode blocks, wherein in a direction perpendicular to the plane where the touch electrode layer is located, the projection areas of the second touch electrode blocks are equal, and the projection areas of the second touch electrode blocks are greater than the projection areas of the first touch electrode blocks; The plurality of first touch electrode blocks include one or more first touch electrode blocks having the largest difference in projection area with the second touch electrode blocks, and the touch signal lines connected to the one or more first touch electrode blocks are multiplexed as the crack detection lines.

17. The display panel according to claim 1, characterized in that: The functional component area has at least one curved edge, and the crack detection line adjacent to the curved edge of the functional component area has an extension path matching the curved edge.

18. A display panel driving method, used for the display panel according to any one of claims 1 to 17, characterized in that: include: Sending a touch signal to the touch electrode block via a touch signal line during a touch stage; In the crack detection stage, a crack detection signal is sent to the touch electrode block through the crack detection line reused in the touch signal line and a feedback signal is received; When the difference between the feedback signal and the reference signal exceeds an error range, a warning signal is output.

19. The display panel driving method according to claim 18, characterized in that: The feedback signal includes a voltage value of the touch electrode block after receiving the crack detection signal.

20. A display device, characterized in that: include: A display panel, wherein the display panel is the display panel according to any one of claims 1 to 17.

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