A display panel and control method thereof, and a display device

Abstract

The present invention discloses a display panel and a control method thereof, and a display device. The array substrate of the display panel comprises a plurality of touch electrode blocks arranged in an array, a plurality of routing lines and a plurality of connecting pads, the touch electrode blocks and the routing lines are arranged in different layers, the plurality of routing lines comprise a heating routing line group, and a heating routing line group is connected to a touch electrode block through a via; the heating routing line group comprises a first routing line and a second routing line electrically connected to each other, and the plurality of connecting pads comprise a first connecting pad and a second connecting pad; the first routing line is electrically connected to the first connecting pad, and the second routing line is electrically connected to the second connecting pad. The display panel provided by the embodiment of the present invention, by arranging the first routing line and the second routing line electrically connected to the same touch electrode block to be connected to different connecting pads, can ensure the touch function while enabling the heating routing line group to realize the heat generation and temperature raising function, thereby improving the display effect and display performance of the display panel at low temperatures at a relatively low cost.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display panel and a control method thereof, and a display device. Background Art

[0002] Liquid crystal display devices are widely used due to their advantages such as low power consumption, miniaturization, and thinness.

[0003] However, due to the characteristics of liquid crystal molecules, the application scenarios of liquid crystal display devices have certain requirements for ambient temperature. For example, since vehicles are often in special working environments, the ambient temperature range that on-board liquid crystal display devices need to adapt to is relatively large, and sometimes even requires that the on-board liquid crystal display devices can work normally within the temperature range of -20°C to 55°C. When the liquid crystal display device is in a low temperature environment, the response speed of the liquid crystal display device will slow down, which will seriously affect the normal display of the liquid crystal display device. Summary of the invention

[0004] The present invention provides a display panel and a control method thereof, and a display device, so as to improve the display effect and display performance of the display panel at low temperatures at a relatively low cost.

[0005] According to one aspect of the present invention, there is provided a display panel, comprising an array substrate and an opposite substrate arranged opposite to each other, and a liquid crystal layer located between the array substrate and the opposite substrate;

[0006] The display panel further comprises a display area and a non-display area located at least on one side of the display area;

[0007] The array substrate comprises a substrate and a plurality of touch electrode blocks arranged in an array, a plurality of wirings and a plurality of connection pads located on one side of the substrate; the touch electrode blocks are located in the display area, and a plurality of the touch electrode blocks are arranged in the same layer, and the connection pads are located in the non-display area;

[0008] The touch electrode blocks and the routing lines are arranged in different layers, and a plurality of the routing lines are electrically connected to a plurality of the touch electrode blocks in correspondence, and a plurality of the routing lines are electrically connected to a plurality of the connecting pads in a one-to-one correspondence;

[0009] The plurality of routing lines include a heating routing line group, and one heating routing line group is connected to one touch electrode block through a via hole;

[0010] The heating routing group includes a first routing line and a second routing line electrically connected to each other, and the plurality of connecting pads include a first connecting pad and a second connecting pad; the first routing line is electrically connected to the first connecting pad, and the second routing line is electrically connected to the second connecting pad.

[0011] According to another aspect of the present invention, a control method of a display panel is provided, which is used for the display panel according to the first aspect, and the control method includes:

[0012] In a touch control stage, applying a touch control signal to the first connecting pad and the second connecting pad;

[0013] In the heating stage, a first heating voltage signal is applied to the first connecting pad, and a second heating voltage signal is applied to the second connecting pad, wherein the first heating voltage signal and the second heating voltage signal are different voltage signals.

[0014] According to another aspect of the present invention, a display device is provided, comprising the display panel according to the first aspect.

[0015] The display panel and control method thereof and the display device provided by the embodiments of the present invention are provided with a heating wiring group electrically connected to the touch electrode block, including a first wiring and a second wiring electrically connected to each other, and the first wiring is electrically connected to the first connection pad, and the second wiring is electrically connected to the second connection pad. While ensuring that the heating wiring group can transmit touch signals and realize the touch function, different voltages can be applied to the first connection pad and the second connection pad to make the heating wiring group generate heat and heat up, thereby playing a role in heating the liquid crystal layer, and improving the display effect and display performance of the display panel at low temperatures. In addition, the heating function is realized by using the wiring that transmits the touch signal to the touch electrode block, and there is no need to set up an additional heating wiring film layer. When preparing the display panel, the number of mask plates and the number of process steps can be saved, thereby reducing the preparation cost.

[0016] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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.

[0018] Figure 1 A schematic diagram of the structure of a display panel provided by an embodiment of the present invention;

[0019] Figure 2 for Figure 1 A schematic diagram of the enlarged structure at A;

[0020] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure along the B-B' direction;

[0021] Figure 4 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0022] Figure 5 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0023] Figure 6 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0024] Figure 7 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0025] Figure 8 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0026] Fig. 9 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0027] Fig.10 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0028] Fig.11 A schematic diagram of a partial structure of a display panel provided by an embodiment of the present invention;

[0029] Fig.12 for Fig.11 Schematic diagram of the cross-sectional structure along the C-C' direction;

[0030] Fig.13 for Fig.11 Schematic diagram of the cross-sectional structure along the D-D' direction;

[0031] Fig.14 for Fig.11 Schematic diagram of the cross-sectional structure along the E-E' direction;

[0032] Fig.15 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0033] Fig.16 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0034] Fig.17 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0035] Fig.18 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0036] Fig.19 A schematic diagram of a partial cross-sectional structure of a display panel provided by an embodiment of the present invention;

[0037] Fig. 20 A schematic diagram of a partial structure of another display panel provided by an embodiment of the present invention;

[0038] Fig.21 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0039] Fig. 22 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0040] Fig.23 A schematic flow chart of a method for controlling a display panel provided by an embodiment of the present invention;

[0041] Fig.24 A schematic structural diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0043] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0044] Figure 1 A schematic diagram of the structure of a display panel provided by an embodiment of the present invention, Figure 2 for Figure 1 A schematic diagram of the enlarged structure at A. Figure 3 for Figure 2The schematic diagram of the cross-sectional structure along the B-B' direction is as follows: Figure 1-Figure 3 As shown, the display panel provided by the embodiment of the present invention includes an array substrate 10 and an opposing substrate 11 arranged opposite to each other, and a liquid crystal layer 12 located between the array substrate 10 and the opposing substrate 11. The display panel also includes a display area 20 and a non-display area 21 located at least on one side of the display area 20. The array substrate 10 includes a substrate 101 and a plurality of touch electrode blocks 102 arranged in an array, a plurality of wirings 103 and a plurality of connecting pads 104 located on one side of the substrate 101. The touch electrode blocks 102 are located in the display area 20, and the plurality of touch electrode blocks 102 are arranged in the same layer, and the connecting pads 104 are located in the non-display area 21. The touch electrode blocks 102 and the wirings 103 are arranged in different layers, and the plurality of wirings 103 and the plurality of touch electrode blocks 102 are electrically connected correspondingly, and the plurality of wirings 103 and the plurality of connecting pads 104 are electrically connected one by one. The plurality of wirings 103 include a heating wiring group 30, and one heating wiring group 30 is connected to one touch electrode block 102 through a via 31. The heating wiring group 30 includes a first wiring 301 and a second wiring 302 electrically connected to each other. The plurality of connecting pads 104 include a first connecting pad 41 and a second connecting pad 42. The first wiring 301 is electrically connected to the first connecting pad 41, and the second wiring 302 is electrically connected to the second connecting pad 42.

[0045] Specifically, Figure 1-Figure 3 As shown, the display area 20 of the display panel is provided with a plurality of sub-pixels 201 arranged in an array for realizing an image display function.

[0046] The sub-pixel 201 includes a pixel driving circuit 100 arranged on the array substrate 10. The pixel driving circuit 100 is connected to the pixel electrode 13. A driving voltage is applied to the pixel electrode 13 by the pixel driving circuit 100, so that an electric field can be formed between the pixel electrode 13 and the common electrode 14. The electric field can deflect the liquid crystal molecules in the liquid crystal layer 12. After the liquid crystal molecules are deflected, the light generated by the backlight component will pass through the display panel. By adjusting the size of the electric field by the pixel driving circuit 100, the liquid crystal molecules can be deflected to different degrees. When the liquid crystal molecules are deflected to different degrees, the transmittance of the display panel is different, and the amount of light transmitted through the display panel by the backlight component is different, thereby realizing the display of the image.

[0047] Furthermore, the counter substrate 11 and the array substrate 10 are arranged relative to each other to form a liquid crystal box to accommodate the above-mentioned liquid crystal layer 12, wherein the counter substrate 11 can be a color film substrate, and a black matrix and a photoresist layer can be provided on the color film substrate to realize color image display of the display panel.

[0048] Continue to refer Figure 1-Figure 3A plurality of touch electrode blocks 102 arranged in an array are arranged on one side of the substrate 101. The plurality of touch electrode blocks 102 are arranged in the same layer and are insulated from each other. Each touch electrode block 102 can form a self-capacitance with the ground. The external capacitance formed by the finger contact will change the self-capacitance formed between the touch electrode block 102 and the ground, and then the specific position of the touch point can be detected, thereby realizing a self-capacitive touch display panel.

[0049] In this embodiment, the touch electrode block 102 is disposed in the display area 20 to implement the touch function of the display area 20 .

[0050] Continue to refer Figure 1-Figure 3 The display panel has multiple wirings 103 arranged in a different layer from the touch electrode block 102. The multiple wirings 103 can be divided into multiple heating wiring groups 30. The heating wiring groups 30 are electrically connected to the touch electrode blocks 102 in a one-to-one correspondence. An insulating layer 15 is arranged between the touch electrode block 102 and the multiple wirings 103. The electrical connection between the heating wiring group 30 and the touch electrode block 102 can be achieved by setting a via 31 in the insulating layer 15.

[0051] At least one side of the display area 20 is provided with a non-display area 21, and a plurality of connection pads 104 are provided in the non-display area 21. The plurality of connection pads 104 are electrically connected to the plurality of wirings 103 in a one-to-one correspondence. The connection pads 104 are used to bind the control chip 16, so that the signal output by the control chip 16 is introduced into the display area 20 through the connection pads 104 and the wirings 103 electrically connected thereto in a one-to-one correspondence, thereby realizing the touch, heating and display functions of the display area 20. Among them, the connection pads 104 are provided in the non-display area 21, so as to avoid the connection pads 104 affecting the image display.

[0052] In addition, the control chip 16 can be set on the display panel, but is not limited to this. In other embodiments, the control chip 16 can also be set on a flexible printed circuit (FPC) bound and connected to the display panel, or set on the main board of the display device. The embodiment of the present invention does not make specific limitations on this.

[0053] Continue to refer Figure 1-Figure 3 Each heating line group 30 is composed of a first line 301 and a second line 302 electrically connected to each other, and a plurality of connecting pads 104 include a first connecting pad 41 and a second connecting pad 42. Each first line 301 is electrically connected to a corresponding first connecting pad 41, and each second line 302 is electrically connected to a corresponding second connecting pad 42.

[0054] Based on the above structural setting, when the first connecting pad 41 and / or the second connecting pad 42 receives a touch signal, the touch signal can be transmitted to the touch electrode block 102 via the heating wiring group 30, thereby realizing the touch function.

[0055] At the same time, when the first connecting pad 41 and the second connecting pad 42 connected to the same heating wiring group 30 both receive touch signals, the touch signal is transmitted to the touch electrode block 102 through the two wirings 103 of the first wiring 301 and the second wiring 302, which is equivalent to the first wiring 301 and the second wiring 302 being connected in parallel, which can reduce the resistance of the heating wiring group 30 and reduce the resistance voltage drop (IR Drop) of the touch signal on the heating wiring group 30, which helps to improve the touch accuracy.

[0056] Furthermore, each heating wiring group 30 is composed of a first wiring 301 and a second wiring 302 which are electrically connected to each other, and the first wiring 301 and the second wiring 302 are connected to different connecting pads 104, namely, a first connecting pad 41 and a second connecting pad 42, so that the first wiring 301 and the second wiring 302 can receive different voltages to form a DC voltage. The heating wiring group 30 connected to the first connecting pad 41 and the second connecting pad 42 will generate heat and heat up under the action of the DC voltage, thereby heating the liquid crystal layer 12, and further improving the response speed of the liquid crystal molecules in the liquid crystal layer 12 in a low temperature environment, ensuring that the liquid crystal molecules in the display panel can still respond quickly in a low temperature environment, thereby improving the display effect and display performance of the display panel at low temperatures.

[0057] It should be noted that the above-mentioned heating function is realized by the first wiring 301 and the second wiring 302 electrically connected to the touch electrode block 102, that is, the heating function is realized by utilizing the wiring 103 that transmits the touch signal to the touch electrode block 102, and there is no need to set up an additional heating wiring film layer. Therefore, when preparing the display panel, the number of mask plates and the number of process steps can be saved, thereby reducing the preparation cost; at the same time, the thickness of the display panel will not be increased, which is conducive to realizing a lightweight design of the display panel.

[0058] In addition, in order to more clearly illustrate the various structures involved in the present invention, Figure 1-Figure 3 Only four touch electrode blocks 102 are shown in the figure. It can be understood that in practical applications, the display panel can be provided with more touch electrode blocks 102 to achieve a more precise touch effect. The embodiment of the present invention does not specifically limit the number of touch electrode blocks 102.

[0059] In summary, the display panel provided by the embodiment of the present invention is provided with a heating wiring group electrically connected to the touch electrode block, including a first wiring and a second wiring electrically connected to each other, and the first wiring is electrically connected to the first connection pad, and the second wiring is electrically connected to the second connection pad. While ensuring that the heating wiring group can transmit touch signals and realize the touch function, different voltages can be applied to the first connection pad and the second connection pad to make the heating wiring group generate heat and heat up, thereby playing a role in heating the liquid crystal layer and improving the display effect and display performance of the display panel at low temperatures. In addition, the heating function is realized by using the wiring that transmits the touch signal to the touch electrode block, and there is no need to set up an additional heating wiring film layer. When preparing the display panel, the number of mask plates and the number of process steps can be saved, thereby reducing the preparation cost.

[0060] Optionally, the working phase of the display panel includes a touch phase and a heating phase.

[0061] In the touch control stage, the first connection pad 41 and the second connection pad 42 are used to transmit touch control signals.

[0062] In the heating stage, the first connecting pad 41 is used to receive a first heating voltage signal, and the second connecting pad 42 is used to receive a second heating voltage signal, and the first heating voltage signal and the second heating voltage signal are different voltage signals.

[0063] Specifically, when the ambient temperature is low, the display panel can periodically perform the actions of the heating stage and the touch stage, and each cycle may include a heating stage and a touch stage, thereby achieving periodic heating, so that the liquid crystal layer 12 is stably maintained within the temperature range required for operation, ensuring that the liquid crystal molecules in the display panel can still respond quickly in a low temperature environment, thereby improving the display effect and display performance of the display panel at low temperatures, but is not limited to this.

[0064] Among them, when the display panel is in the touch stage, the first connecting pad 41 and the second connecting pad 42 can receive the touch signal provided by the control chip 16, and the touch signal is transmitted to the touch electrode block 102 via the first wiring 301 and the second wiring 302, and then the first wiring 301 and the second wiring 302 receive the touch detection signal fed back by each touch electrode block 102, and the touch detection signal is then transmitted to the touch chip 16 via the first connecting pad 41 and the second connecting pad 42, so that the specific position of the touch point can be detected to realize the touch function.

[0065] When the display panel is in the heating stage, the first connecting pad 41 can receive the first heating voltage signal provided by the control chip 16, and the second connecting pad 42 can receive the second heating voltage signal provided by the control chip 16, wherein the first heating voltage signal and the second heating voltage signal are different voltage signals, thereby forming a voltage difference at both ends of the heating wiring group 30, generating current on the heating wiring group 30, and generating heat, thereby realizing the heating function of the liquid crystal layer 12, so that the display panel can display normally even in a low temperature environment.

[0066] Optionally, the touch electrode block 102 is multiplexed as a common electrode, and the common electrode is used to receive a fixed voltage signal in a display stage.

[0067] Among them, the touch electrode block 102 can be reused as a common electrode at the same time, that is, the touch electrode block 102 and the common electrode in the display panel have the same structure. The touch electrode block 102 is used as a touch electrode in the touch stage to receive a touch signal to realize the touch function; the touch electrode block 102 is used as a common electrode in the display stage to receive a fixed voltage signal, which is the common voltage signal. The common voltage signal and the data signal on the pixel electrode can control the deflection of the liquid crystal in the display panel, so that the display panel can realize the function of displaying images.

[0068] In this embodiment, by reusing the touch electrode block 102 as a common electrode, there is no need to set up an additional common electrode film layer, so that when preparing the display panel, the number of mask plates and the number of process steps can be saved, thereby reducing the preparation cost; at the same time, reducing the setting of one film layer helps to reduce the thickness of the display panel, which is conducive to realizing a lightweight design of the display panel.

[0069] In addition, during the display stage of the display panel, a common voltage signal can be simultaneously applied to the first connecting pad 41 and the second connecting pad 42 connected to the same heating wiring group 30. The common voltage signal is transmitted to the touch electrode block 102 through the two wirings 103 of the first wiring 301 and the second wiring 302, which is equivalent to connecting the first wiring 301 and the second wiring 302 in parallel. The resistance of the heating wiring group 30 can be reduced, and the resistance drop (IR Drop) of the common voltage signal on the heating wiring group 30 is reduced, which helps to improve the display effect.

[0070] Continue to refer Figure 1-3 Optionally, the array substrate 10 further includes a pixel electrode 13, the pixel electrode 13 is located on a side of the touch electrode block 102 away from the substrate 101, and the wiring 103 is located on a side of the touch electrode block 102 away from the pixel electrode 13. Along the thickness direction of the display panel, the pixel electrode 13, the touch electrode block 102, and the wiring 103 have an overlapping area.

[0071] Among them, when the touch electrode block 102 is reused as a common electrode, compared with the pixel electrode 13, the touch electrode block 102 can be closer to the substrate 101, and the pixel electrode 13 and the touch electrode block 102 are both block structures, forming a mid-com structure, which is mainly an IPS structure (In-Plane Switching), which helps to achieve a wide viewing angle display of the display panel.

[0072] The inventor has found through research that during the heating stage, the voltage difference on the heating wiring group 30 will form an electric field, and the electric field will affect the electric field formed on the pixel electrode 13, thereby affecting the deflection of the liquid crystal molecules, thereby affecting the display effect. Therefore, in this embodiment, the touch electrode block 102 is arranged between the wiring and the pixel electrode 13, and the vertical projections of the pixel electrode 13, the touch electrode block 102 and the wiring 103 on the substrate 101 have an overlapping area, so that the touch electrode block 102 can shield the electric field formed by the heating wiring group 30, reduce the influence of the heating wiring group 30 on the electric field formed by the pixel electrode 13, thereby ensuring the display effect of the display panel.

[0073] Optionally, a vertical projection of the touch electrode block 102 on the substrate 101 covers a vertical projection of the pixel electrode 13 on the substrate 101 .

[0074] Among them, along the thickness direction of the display panel, the touch electrode block 102 is arranged to cover the pixel electrode 13, thereby providing a better shielding effect for the pixel electrode 13, preventing the heating wiring group 30 from affecting the electric field formed by the pixel electrode 13, and further improving the display effect of the display panel.

[0075] Figure 4 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 4 As shown, optionally, multiple heating wire groups 30 are arranged along a first direction X, the first wire 301 and the second wire 302 extend along a second direction Y, and the first direction X intersects the second direction Y. The lengths of the first wires 301 of all heating wire groups 30 are the same, the lengths of the second wires 302 of all heating wire groups 30 are the same, and the lengths of the first wire 301 and the second wire 302 are the same.

[0076] Among them, Figure 4 As shown, by arranging the heating wiring group 30 along the first direction X and extending along the second direction Y, and the lengths of the first wiring 301 and the second wiring 302 in each heating wiring group 30 are the same, it helps to make the distribution of the first wiring 301 and the second wiring 302 more uniform, which is beneficial to make the surface morphology of each area of ​​the display panel more consistent, thereby improving the display uniformity of the display panel.

[0077] At the same time, the lengths of the first wire 301 and the second wire 302 in each heating wire group 30 are the same, which makes it easier to calculate the voltage difference required to be applied to the heating wire group 30 according to the required heating amount during the heating stage.

[0078] It should be noted that Figure 4 Taking the first direction X being perpendicular to the second direction Y as an example, in practical applications, the angle between the first direction X and the second direction Y can be set according to actual needs, and it is only necessary to ensure that the first direction X and the second direction Y intersect, and the embodiment of the present invention does not make any specific limitation on this.

[0079] Figure 5 A structural diagram of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 5 As shown, optionally, both ends of the first wiring 301 extend to the non-display area 21 , and both ends of the second wiring 302 extend to the non-display area 21 .

[0080] Among them, Figure 5 As shown, one end of the first routing line 301 extends to the non-display area 21 and is electrically connected to the first connecting pad 41, and the other end of the first routing line 301 extends to the non-display area 21 of the display area 20 away from the first connecting pad 41; similarly, one end of the second routing line 302 extends to the non-display area 21 and is electrically connected to the second connecting pad 42, and the other end of the second routing line 302 extends to the non-display area 21 of the display area 20 away from the second connecting pad 42; thereby, the first routing line 301 and the second routing line 302 both pass through the display area 20. With such an arrangement, the distribution of the first routing line 301 and the second routing line 302 in the display area 20 can be more uniform, thereby making the surface morphology of each area in the display area 20 more consistent, which helps to improve the display uniformity of the display panel.

[0081] At the same time, the first wiring 301 and the second wiring 302 both pass through the display area 20, and the first wiring 301 and the second wiring 302 can also be distributed in the entire display area 20, so as to realize the whole-screen heating function of the display panel, and then improve the response speed of the liquid crystal molecules in the entire display area 20 in a low temperature environment, and improve the display effect and display performance of the display panel at low temperatures.

[0082] Continue to refer Figure 5 Optionally, the display panel provided by the embodiment of the present invention further includes a first connecting line 303 extending along the first direction X, the first connecting pad 41 and the second connecting pad 42 are located in the non-display area 21 on the same side of the display area 20, the first connecting line 303 is located in the non-display area 21 on the side of the display area 20 away from the first connecting pad 41 and the second connecting pad 42, and the first wiring 301 and the second wiring 302 of the same heating wiring group 30 are electrically connected through the first connecting line 303.

[0083] Among them, Figure 5 As shown, the first wiring 301 and the second wiring 302 of the same heating wiring group 30 are electrically connected through the first connecting line 303 extending along the first direction X. While realizing the electrical connection between the first wiring 301 and the second wiring 302, on the one hand, the first connecting line 303 is located in the non-display area 21, so as to avoid the first connecting line 303 from blocking the display area 20, thereby reducing the influence of the first connecting line 303 on the display effect; on the other hand, the first connecting line 303 is located in the non-display area 21 opposite to the first connecting pad 41 and the second connecting pad 42. In the heating stage, the transmission path of the direct current formed on the heating wiring group 30 can be made longer, the heating range is larger, and the heating range runs through the entire display area 20, so as to realize the whole-screen heating function of the display panel, thereby improving the response speed of the liquid crystal molecules in the entire display area 20 in a low-temperature environment, and improving the display effect and display performance of the display panel at low temperatures.

[0084] It should be noted that the first connecting line 303, the first routing line 301 and the second routing line 302 can be located in the same film layer. Without increasing the thickness of the display panel, the first connecting line 303, the first routing line 301 and the second routing line 302 can be formed in the same process flow, thereby shortening the process time, but is not limited to this.

[0085] In other embodiments, the first connecting line 303 may also be located in a different film layer from the first routing line 301 and the second routing line 302 , and those skilled in the art may make settings according to actual needs.

[0086] Optionally, a voltage difference between the first heating voltage signal and the second heating voltage signal is a fixed value.

[0087] When the display panel is in the heating stage, by setting the voltage difference between the first heating voltage signal received by the first connecting pad 41 and the second heating voltage signal received by the second connecting pad 42 to a fixed value, the voltage difference formed at both ends of each heating wiring group 30 can be made the same, so that the heating power of each heating wiring group 30 is more consistent, achieving uniform heating of the liquid crystal layer 12, which helps to improve the display uniformity of the display panel in a low temperature environment.

[0088] Continue to refer Figure 5 Optionally, the touch electrode block 102 is reused as a common electrode. The first wiring 301 or the second wiring 302 in the heating wiring group 30 is electrically connected to the touch electrode block 102 through the via 31. The larger the distance between the via 31 and the corresponding first connecting pad 41, the smaller the first heating voltage signal received by the corresponding first connecting pad 41 during the heating stage, and the smaller the second heating voltage signal received by the corresponding second connecting pad 42 during the heating stage.

[0089] Among them, the inventors have found through research that when the touch electrode block 102 is reused as a common electrode, the electric field formed between the touch electrode block 102 and the pixel electrode 13 will directly affect the deflection of the liquid crystal molecules in the liquid crystal layer 12, thereby affecting the display brightness of the sub-pixel 201. Therefore, in the heating stage, the voltage on the touch electrode block 102 is kept the same as the common voltage signal applied in the display stage, which can ensure that the electric field formed between the touch electrode block 102 and the pixel electrode 13 remains unchanged in the heating stage, thereby avoiding the voltage on the touch electrode block 102 changing in the heating stage and affecting the display effect.

[0090] Specifically, in the heating stage, different voltages are applied to the first connecting pad 41 and the second connecting pad 42 respectively, so that there is a voltage difference at both ends of the path of the first connecting pad 41-first wiring 301-second wiring 302-second connecting pad 42, and there is current in the path, which can be used for heating.

[0091] Illustratively, during the heating stage, a high potential may be applied to the first connecting pad 41, and a low potential may be applied to the second connecting pad 42. The first connecting pad 41 and the second connecting pad 42 provide a constant voltage difference, so that a constant current exists in the heating wiring group 30. The current flows through the first wiring 301 and the second wiring 302, causing the first wiring 301 and the second wiring 302 to generate heat, thereby heating the liquid crystal layer 12. However, it is not limited to this. In other embodiments, a low potential may be applied to the first connecting pad 41, and a high potential may be applied to the second connecting pad 42 to achieve the heating function.

[0092] Taking the example of applying a low potential to the first connecting pad 41 and a high potential to the second connecting pad 42 during the heating stage, along the path direction of the current transmission in the heating wiring group 30, assuming that the resistance between the first connecting pad 41 and the via 31 is R1, and the resistance between the second connecting pad 42 and the via 31 is R2, the voltages of the first connecting pad 41 and the second connecting pad 42 during the heating stage are U1 and U2, respectively, that is, the voltage value of the first heating voltage signal is U1, and the voltage value of the second heating voltage signal is U2, then the voltage U on the touch electrode block 102 (that is, the voltage at the via 31) is U1+(U2-U1)*R1 / (R1+R2).

[0093] In order to ensure that the heating effects of the various heating wiring groups 30 are the same, U2 - U1 is set to a fixed value ΔU.

[0094] When the line widths of the first trace 301 and the second trace 302 are the same, R1 and R2 are basically only related to the distance h between the via 31 and the corresponding first connection pad 41 .

[0095] like Figure 2As shown, the lengths of the first routing line 301 and the second routing line 302 are fixed, so R1+R2 is a fixed value, and the lengths of the first routing line 301 and the second routing line 302 are also a fixed value H.

[0096] Therefore, U=U1+(U2-U1)*R1 / (R1+R2)=U1+ΔU*h / (2*H), then U1=U-ΔU*h / (2*H).

[0097] As described above, in order to ensure normal display of the display panel, the voltages on all touch electrode blocks 102 must be the same, and the voltage U on the touch electrode block 102 should be the fixed voltage signal Vcom applied to the touch electrode block 102 during the display phase.

[0098] Therefore, U1 = Vcom - ΔU*h / (2*H), U2 = ΔU+Vcom - ΔU*h / (2*H).

[0099] For the touch electrode block 102 at each position, the larger the distance h between the connected via 31 and the corresponding first connecting pad 41, the smaller the first heating voltage signal U1 received by the corresponding first connecting pad 41 during the heating stage, and the smaller the second heating voltage signal U2 received by the corresponding second connecting pad 42 during the heating stage, thereby ensuring that during the heating stage, the voltage on the touch electrode block 102 approaches the fixed voltage signal applied during the display stage, so as to avoid a large change in the voltage on the touch electrode block 102 during the heating stage and affect the display effect.

[0100] Continue to refer Figure 5 , Optionally, for any heating wiring group 30, the voltage value of the first heating voltage signal is U1, the voltage value of the second heating voltage signal is U2, U1 = Vcom-ΔU*h / (2*H), U2 = ΔU+Vcom-ΔU*h / (2*H). Wherein, Vcom is the voltage value of the common voltage signal, ΔU is the voltage difference ΔU between the first heating voltage signal U1 and the second heating voltage signal U2, h is the distance between the via 31 and the corresponding first connecting pad 41, and H is the length of the first wiring 301.

[0101] As described above, in the heating stage, for any heating wiring group 30, by setting the voltage value U1 of the first heating voltage signal and the voltage value U2 of the second heating voltage signal to satisfy U1=Vcom-ΔU*h / (2*H), U2=ΔU+Vcom-ΔU*h / (2*H), the voltage U on the touch electrode block 102 can be kept the same as the voltage value Vcom of the common voltage signal applied in the display stage, thereby ensuring that the electric field formed between the touch electrode block 102 and the pixel electrode 13 remains unchanged during the heating stage, thereby avoiding changes in the voltage on the touch electrode block 102 during the heating stage and affecting the display effect.

[0102] Figure 6 A structural diagram of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 6 As shown, optionally, the display panel provided by the embodiment of the present invention further includes a second connecting line 304 extending along the first direction X, the second connecting line 304 is located in the display area 20, and the first wiring 301 and the second wiring 302 of the same heating wiring group 30 are electrically connected through the second connecting line 304.

[0103] Among them, Figure 6 As shown, the first wiring 301 and the second wiring 302 of the same heating wiring group 30 are electrically connected through the second connecting line 304 extending along the first direction X. While realizing the electrical connection between the first wiring 301 and the second wiring 302, the first connecting line 303 is set in the display area 20. Compared with setting it in the non-display area 21, the area of ​​the non-display area 21 can be reduced, which is conducive to achieving a narrow frame effect.

[0104] Furthermore, if Figure 6 As shown, when the lengths of the first wiring 301 and the second wiring 302 are the same, and both ends of the first wiring 301 and the second wiring 302 extend to the non-display area 21, the second connecting line 304 is arranged in the display area 20, so that the heating wiring group 30 can form an H-shaped dual-touch heating wiring structure. On the one hand, the first wiring 301 and the second wiring 302 both pass through the display area 20. Such an arrangement can make the distribution of the first wiring 301 and the second wiring 302 in the display area 20 more uniform, so that the surface morphology of each area in the display area 20 is more consistent, which is helpful to improve the display uniformity of the display panel; on the other hand, the first wiring 301 and the second wiring 302 of the same heating wiring group 30 are connected in parallel, which can reduce the resistance of the heating wiring group 30 and reduce the resistance voltage drop (IR Drop) of the signal transmitted by the heating wiring group 30.

[0105] It should be noted that the second connection line 304 may be located in a different film layer from the first wiring 301 and the second wiring 302, thereby facilitating the ease of arranging other signal lines in the display panel and preventing short circuits between different signal lines.

[0106] Continue to refer Figure 6 Optionally, a vertical projection of the touch electrode block 102 on the substrate 101 at least partially overlaps with a vertical projection of the second connecting line 304 on the substrate 101 .

[0107] Among them, during the heating stage, the current flowing through the second connecting line 304 will also form an electric field, and the electric field will also affect the electric field formed on the pixel electrode 13, thereby affecting the deflection of the liquid crystal molecules, which is not conducive to improving the display effect. Therefore, in this embodiment, by setting the touch electrode block 102 between the second connecting line 304 and the pixel electrode 13, and along the thickness direction of the display panel, the touch electrode block 102 and the second connecting line 304 at least partially overlap, the touch electrode block 102 can shield the electric field formed by the second connecting line 304, reduce the influence of the second connecting line 304 on the deflection of the liquid crystal molecules, thereby ensuring the display effect of the display panel.

[0108] Continue to refer Figure 6 Optionally, the touch electrode block 102 is reused as a common electrode. For any heating wiring group 30, the voltage value of the first heating voltage signal is U1, and the voltage value of the second heating voltage signal is U2, U1 = Vcom-(ΔU / 2), U2 = Vcom+(ΔU / 2). Wherein, Vcom is the voltage value of the common voltage signal, and ΔU is the voltage difference between the first heating voltage signal and the second heating voltage signal.

[0109] Specifically, as described above, when the touch electrode block 102 is reused as a common electrode, the electric field formed between the touch electrode block 102 and the pixel electrode 13 will directly affect the deflection of the liquid crystal molecules in the liquid crystal layer 12, thereby affecting the display brightness of the sub-pixel 201. Therefore, in the heating stage, the voltage on the touch electrode block 102 is kept the same as the common voltage signal applied in the display stage, so that the electric field formed between the touch electrode block 102 and the pixel electrode 13 remains unchanged in the heating stage, thereby avoiding the voltage on the touch electrode block 102 changing in the heating stage and affecting the display effect.

[0110] In this embodiment, along the path direction of current transmission in the heating wiring group 30, since the lengths of the first wiring 301 and the second wiring 302 on the side of the via 31 close to the first connecting pad 41 and the second connecting pad 42 are the same, in the heating stage, as long as the arithmetic mean of the voltages applied to the first connecting pad 41 and the second connecting pad 42 is equal to the voltage value Vcom of the common voltage signal, that is, the voltage value U1 of the first heating voltage signal and the voltage value U2 of the second heating voltage signal satisfy U1=Vcom-(ΔU / 2), U2=Vcom+(ΔU / 2), the voltage on the touch electrode block 102 can be satisfied to be the voltage value Vcom of the common voltage signal, thereby avoiding a large change in the voltage on the touch electrode block 102 during the heating stage to affect the display effect.

[0111] Continue to refer Figure 5 and Figure 6Optionally, the first wiring 301 and / or the second wiring 302 in the same heating wiring group 30 are electrically connected to the touch electrode block 102 through the via 31 .

[0112] For example, Figure 5 and Figure 6 As shown, only the first wiring 301 in the heating wiring group 30 can be electrically connected to the touch electrode block 102 through the via 31. At this time, the via 31 is only set at the first wiring 301. Such a setting can reduce the number of holes, reduce the shading area of ​​the via 31 to the display area 20, and help improve the display brightness.

[0113] In another embodiment, Figure 7 A structural diagram of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 7 As shown, only the second wiring 302 in the heating wiring group 30 can be electrically connected to the touch electrode block 102 through the via 31. In this case, the via 31 is only set at the second wiring 302. Such a setting can also reduce the number of holes, reduce the shading area of ​​the via 31 on the display area 20, and help improve the display brightness.

[0114] In yet another embodiment, Figure 8 A structural diagram of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 8 As shown, the first routing line 301 and the second routing line 302 in the heating routing line group 30 may also be arranged to be electrically connected to the touch electrode block 102 through the via 31. At this time, the via 31 is arranged at the first routing line 301 and the second routing 302. With such arrangement, when the via 31 connected to one of the first routing line 301 and the second routing 302 is damaged, the via 31 connected to the other one may be used for signal transmission, thereby improving the reliability of the display panel.

[0115] It should be noted that the size of the via hole 31 can be set according to actual needs as long as signal transmission can be guaranteed, and the embodiment of the present invention does not make any specific limitation on this.

[0116] Continue to refer Figure 6-Figure 8 Optionally, the second connection line 304 is located on a side of the via hole 31 close to the first connection pad 41 ; or, the second connection line 304 is located on a side of the via hole 31 away from the first connection pad 41 .

[0117] For example, Figure 6-Figure 8As shown, the second connecting line 304 can be arranged on the side of the via 31 close to the first connecting pad 41. With this arrangement, during the heating stage, the first wiring 301 and the second wiring 302 are blind ends at the touch electrode block 102 and the via 31, that is, during the heating stage, there is almost no current on the touch electrode block 102 and the via 31, thereby improving the stability of the voltage on the touch electrode block 102. When the touch electrode block 102 is reused as a common electrode, it can be avoided that the voltage on the touch electrode block 102 changes during the heating stage and affects the display effect of the display panel.

[0118] In another embodiment, Fig. 9 A structural diagram of another display panel provided by an embodiment of the present invention is shown in FIG. Fig. 9 As shown, the second connecting line 304 can also be located on the side of the via 31 away from the first connecting pad 41. With this arrangement, during the heating stage, the transmission path of the current on the heating wiring group 30 can be extended, thereby increasing the heating range and improving the heating efficiency.

[0119] Fig.10 A structural diagram of another display panel provided by an embodiment of the present invention is shown in FIG. Fig.10 As shown, optionally, the heating wiring group 30 is electrically connected to the touch electrode block 102 through at least two vias 31 , and along the second direction Y, at least two vias 31 are distributed on both sides of the second connection line 304 .

[0120] Specifically, Fig.10 As shown, the heating wiring group 30 is electrically connected to the touch electrode block 102 through at least two vias 31. When any via 31 is damaged, other vias 31 can be used for signal transmission, thereby improving the reliability of the display panel.

[0121] Furthermore, along the second direction Y, the second connecting line 304 is located between two adjacent vias 31. On the one hand, during the heating stage, part of the vias 31 can be free of current, thereby improving the stability of the voltage on the touch electrode block 102. On the other hand, the transmission path of the current on the heating wiring group 30 can be appropriately extended, thereby increasing the heating range and improving the heating efficiency.

[0122] It should be noted that the number of vias 31 connected to each heating wiring group 30 can be set according to actual needs. It can be understood that the more the number of vias 31, the better the reliability of the electrical connection. If the number of vias 31 is small, the area occupied by the vias 31 in the display area 20 can be reduced, which helps to improve the display effect of the display panel. The embodiment of the present invention does not make specific limitations on this.

[0123] Fig.11 A schematic diagram of a partial structure of a display panel provided by an embodiment of the present invention, Fig.12 for Fig.11Schematic diagram of the cross-sectional structure along the C-C' direction, as shown in Fig.11 and Fig.12 As shown, optionally, the display area 20 includes a plurality of sub-pixels 201 arranged in an array, the sub-pixel 201 includes a light-emitting area 50 and a wiring area 51 surrounding the light-emitting area 50 , and the second connecting line 304 is located in the wiring area 51 .

[0124] Specifically, Fig.11 and Fig.12 As shown, the light emitting area 50 of the sub-pixel 201 is used to emit light, that is, the light generated by the backlight assembly will be emitted through the light emitting area 50 of the sub-pixel 201 to achieve the image display function. The wiring area 51 of the sub-pixel 201 is a non-light emitting area, which is used to place the pixel driving circuit 100 and other opaque structures to adjust the light emitting brightness of the sub-pixel 201.

[0125] In this embodiment, by disposing the second connection line 304 in the routing area 51 , it is possible to avoid the second connection line 304 blocking the light emitting area 50 and affecting the light emitting brightness of the sub-pixel 201 , thereby reducing the influence of the second connection line 304 on the display effect.

[0126] Optional, continue to refer to Fig.11 and Fig.12 The opposite substrate 11 may be a color filter substrate, on which a photoresist layer 111 and a black matrix 112 may be provided. The photoresist layer 111 is provided corresponding to the light emitting area 50 to adjust the color of the light emitted from the light emitting area 50 and display a color image. The black matrix 112 is provided corresponding to the wiring area 51 to shield the pixel driving circuit 100 and the signal wiring in the wiring area 51, thereby preventing the pixel driving circuit 100 and the signal wiring from reflecting the external ambient light and affecting the display effect of the display panel.

[0127] It should be noted that the arrangement of the sub-pixels 201 is not limited to Fig.11 The arrangement shown in FIG. 1 is a diagram of an arrangement of sub-pixels 201 . Those skilled in the art may set any arrangement of sub-pixels 201 according to actual requirements.

[0128] Fig.13 for Fig.11 The schematic diagram of the cross-sectional structure along the D-D' direction is as follows: Fig.11 and Fig.13 As shown, optionally, the display panel provided by the embodiment of the present invention includes a plurality of sub-pixels 201 arranged in an array, the sub-pixel 201 includes a light-emitting area 50 and a routing area 51 surrounding the light-emitting area 50, and at least one of the routing 103 and the via 31 is located in the routing area 51.

[0129] The configuration of the light emitting area 50 and the wiring area 51 in the sub-pixel 201 may refer to the above-mentioned embodiment and will not be described in detail here.

[0130] In this embodiment, if Fig.11 and Fig.13 As shown, the wiring 103 can be arranged in the wiring area 51 , so as to avoid the wiring 103 blocking the light-emitting area 50 and affecting the light-emitting brightness of the sub-pixel 201 , thereby reducing the influence of the wiring 103 on the display effect.

[0131] Fig.14 for Fig.11 The schematic diagram of the cross-sectional structure along the E-E' direction is as follows: Fig.11 and Fig.14 As shown, the via 31 can also be arranged in the routing area 51, so as to avoid the via 31 blocking the light-emitting area 50 and affecting the light-emitting brightness of the sub-pixel 201, thereby reducing the influence of the via 31 on the display effect. Those skilled in the art can make arrangements according to actual needs.

[0132] Fig.15 A structural diagram of another display panel provided by an embodiment of the present invention is shown in FIG. Fig.15 As shown, optionally, the plurality of routing lines 103 further include a third routing line 305 , the plurality of connecting pads 104 further include a third connecting pad 43 , and the third routing line 305 and the third connecting pad 43 are electrically connected.

[0133] In the touch control stage, the third connection pad 43 is used to transmit the touch control signal.

[0134] In the heating stage, the third connection pad 43 is used to receive a fixed voltage signal.

[0135] Specifically, in this embodiment, the heating function can be realized by only partially utilizing the wiring 103 that transmits the touch signal to the touch electrode block 102 , that is, part of the touch electrode block 102 is only connected to a third wiring 305 through the via 31 , and the third wiring 305 is electrically connected to a third connecting pad 43 .

[0136] In the touch control stage, the third connection pad 43 receives a touch control signal, and the touch control signal can be transmitted to the touch control electrode block 102 via the third wiring 305, thereby realizing the touch control function.

[0137] In the heating stage, the third wiring 305 is not used for heating. At this time, the third connecting pad 43 receives a fixed voltage signal, and the fixed voltage signal can be transmitted to the touch electrode block 102 via the third wiring 305, thereby avoiding voltage fluctuations on the touch electrode block 102 and affecting the deflection of liquid crystal molecules, thereby ensuring normal display.

[0138] Among them, the number of heating wiring groups 30 and third wirings 305 can be set according to the heating power requirements. It can be understood that the more heating wiring groups 30 there are, the higher the heating efficiency; and the fewer heating wiring groups 30 there are, the fewer wirings 103 there are, which is beneficial to reducing the width of the wiring area 51, increasing the area of ​​the light-emitting area 50, and improving the light-emitting efficiency.

[0139] Continue to refer Fig.15 Optionally, the touch electrode block 102 is multiplexed as a common electrode, and the fixed voltage signal is a common voltage signal.

[0140] As described above, when the touch electrode block 102 is reused as a common electrode, the electric field formed between the touch electrode block 102 and the pixel electrode 13 will directly affect the deflection of the liquid crystal molecules in the liquid crystal layer 12, thereby affecting the display brightness of the sub-pixel 201. Therefore, in the heating stage, the fixed voltage signal received by the third connection pad 43 is set as the common voltage signal, which can keep the voltage on the touch electrode block 102 the same as the common voltage signal applied in the display stage, thereby avoiding the voltage on the touch electrode block 102 changing in the heating stage and affecting the display effect.

[0141] Continue to refer Fig.15 Optionally, the first routing line 301 , the second routing line 302 and the third routing line 305 are arranged along the first direction X and extend along the second direction Y, and the first direction X and the second direction Y intersect.

[0142] Among them, Fig.15 As shown, by arranging a line 301, a second line 302 and a third line 305 along the first direction X and extending in the same direction, the arrangement of the lines 103 in the display area 20 can be made more regular, so that the surface morphology of each area in the display area 20 is more consistent, which helps to improve the display uniformity of the display panel.

[0143] Continue to refer Fig.15 Optionally, along the first direction X, the third routing line 305 is located between the first routing line 301 and the second routing line 302 in the same heating routing line group 30 , and / or the third routing line 305 is located between adjacent heating routing line groups 30 .

[0144] For example, Fig.15As shown, the third wiring 305 can be arranged between the first wiring 301 and the second wiring 302 in the same heating wiring group 30, so that the first wiring 301 and the second wiring 302 in the same heating wiring group 30 are arranged at intervals, thereby ensuring that the distance between adjacent wirings 103 is small and the area of ​​the wiring region 51 is not increased. At the same time, the distance between the first wiring 301 and the second wiring 302 in the same heating wiring group 30 can be increased, avoiding excessive concentration of heat generated by the first wiring 301 and the second wiring 302 to cause uneven heating, thereby helping to improve the display uniformity of the display panel.

[0145] In another embodiment, Fig.16 A structural diagram of another display panel provided by an embodiment of the present invention is shown in FIG. Fig.16 As shown, optionally, the third wiring 305 can also be set between adjacent heating wiring groups 30 to arrange the heating wiring groups 30 at intervals, thereby ensuring that the spacing between adjacent wirings 103 is small and the area of ​​the wiring area 51 is not increased. At the same time, the distance between adjacent heating wiring groups 30 can be increased to avoid excessive concentration of heat due to the heating wiring groups 30 being arranged too densely, resulting in uneven heating, which helps to improve the display uniformity of the display panel.

[0146] In yet another embodiment, Fig.17 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention, Fig.18 A structural diagram of another display panel provided by an embodiment of the present invention is shown in FIG. Fig.17 and Fig.18 As shown, optionally, the third wiring 305 can also be arranged between adjacent heating wiring groups 30, and between the first wiring 301 and the second wiring 302 in the same heating wiring group 30, so that the first wiring 301 and the second wiring 302 in the same heating wiring group 30 are arranged at intervals, and the heating wiring groups 30 are arranged at intervals, thereby ensuring that the spacing between adjacent wirings 103 is small and the area of ​​the wiring region 51 is not increased. At the same time, the distance between the first wiring 301 and the second wiring 302 in the same heating wiring group 30 can be increased, and the distance between adjacent heating wiring groups 30 can be increased, so as to avoid uneven heating caused by excessive concentration of heat, thereby helping to improve the display uniformity of the display panel.

[0147] Continue to refer Fig.17 and Fig.18 It should be noted that the number of third lines 305 between the first line 301 and the second line 302 in the same heating line group 30 can be one, two or more. At the same time, the number of third lines 305 between adjacent heating line groups 30 can also be one, two or more. Those skilled in the art can set it according to actual needs.

[0148] Furthermore, to ensure that the heating lines 103 are evenly distributed to achieve uniform heating, the number of third lines 305 between the first line 301 and the second line 302 in the same heating line group 30 can be set equal to the number of third lines 305 between adjacent heating line groups 30, but is not limited to this.

[0149] Continue to refer Fig.18 Optionally, multiple heating wiring groups 30 are evenly distributed in the display area 20 .

[0150] Among them, by arranging the heating wiring group 30 to be evenly distributed in the display area 20, that is, the spacing between adjacent heating wiring groups 30 is the same, the heat generated by the heating wiring group 30 can be evenly distributed in the display area 20, thereby achieving uniform heating, which helps to improve the display uniformity of the display panel in a low temperature environment.

[0151] Continue to refer Fig.18 Optionally, the plurality of wirings 103 are evenly distributed in the display area 20 .

[0152] Among them, whether it is the wiring 103 used for heating (such as the first wiring 301 and the second wiring 302) or the wiring 103 not used for heating (such as the third wiring 305), by setting these wirings 103 to be evenly distributed, that is, the spacing between adjacent wirings 103 is the same, the wirings 103 can be regularly arranged in the display area 20, so that the surface morphology of each area in the display area 20 is kept consistent, which helps to improve the display uniformity of the display panel.

[0153] Continue to refer Figure 1-Figure 3 Optionally, the display area 20 includes a plurality of sub-pixels 201 arranged in an array, the sub-pixels 201 include a pixel driving circuit 100, and the pixel driving circuit 100 includes at least one transistor T. The transistor T includes an active layer 60, a gate layer 61, and a source-drain electrode layer 62 stacked on one side of the substrate 101, and the wiring 103 is arranged on the same layer as the gate layer 61 or the source-drain electrode layer 62.

[0154] For example, Figure 3 As shown, the wiring 103 can be arranged in the same layer as the source-drain electrode layer 62 to reduce the arrangement of one metal layer, thereby achieving the purpose of reducing the thickness of the display panel. At the same time, the wiring 103 can be made of the same material as the source-drain electrode layer 62, so that the wiring 103 and the source-drain electrode layer 62 can be prepared in the same process, which can save the cost of a mask, thereby reducing the production cost and shortening the process time.

[0155] In another embodiment, Fig.19 A partial cross-sectional structure diagram of a display panel provided by an embodiment of the present invention is shown in FIG. Fig.19As shown, the wiring 103 and the gate layer 61 can also be arranged in the same layer to reduce the arrangement of one metal layer, thereby achieving the purpose of reducing the thickness of the display panel. At the same time, the wiring 103 can be made of the same material as the gate layer 61, so that the wiring 103 and the gate layer 61 can be prepared in the same process, which can save the cost of a mask, thereby reducing the production cost and shortening the process time.

[0156] Fig. 20 A partial structural diagram of another display panel provided by an embodiment of the present invention, Fig.21 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention, Fig. 22 A structural diagram of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 20-Figure 22 As shown, optionally, the heating wiring group 30 is electrically connected to the touch electrode block 102 through a plurality of vias 31 .

[0157] For example, Figure 20-Figure 22 As shown, by setting the heating wiring group 30 to be electrically connected to the touch electrode block 102 through multiple vias 31, when any via 31 is damaged, other vias 31 can be used for signal transmission, thereby improving the reliability of the display panel.

[0158] Among them, the number of vias 31 connected to a heating wiring group 30 can be 2, 3, 9 or more, and those skilled in the art can set it according to actual needs. It can be understood that the more the number of vias 31, the better the reliability of the electrical connection, and the fewer the number of vias 31, the smaller the area occupied by the vias 31 in the display area 20 can be, which helps to improve the display effect of the display panel. The embodiment of the present invention does not make specific limitations on this.

[0159] Continue to refer Fig. 20 The multiple vias 31 connected to the same heating wiring group 30 can be dispersed in multiple wiring areas 51. For example, only one via 31 is set in the wiring area 51 of each sub-pixel 201, which is beneficial to reduce the width of the wiring area 51, increase the area of ​​the light-emitting area 50, and improve the light-emitting efficiency.

[0160] It should be noted that the distance between the multiple vias 31 connected to the same heating wiring group 30 is relatively close. Therefore, the resistance between two vias 31 can be basically ignored compared with the resistance on the entire path formed by the first connecting pad 41-first wiring 301-second wiring 302-second connecting pad 42. Therefore, it can be considered that there is no voltage drop between the multiple vias 31 connected to the same heating wiring group 30. Therefore, the setting rules of the voltage value U1 of the first heating voltage signal and the voltage value U2 of the second heating voltage signal described in the above embodiments are still applicable.

[0161] Based on the same inventive concept, an embodiment of the present invention further provides a method for controlling a display panel, which is used to control any display panel provided by the above embodiments. The explanation of structures and terms that are the same or corresponding to the above embodiments will not be repeated here.

[0162] Fig.23 A flow chart of a method for controlling a display panel provided by an embodiment of the present invention is shown in FIG. Fig.23 As shown, the control method includes:

[0163] Step 110 : In a touch control stage, applying a touch control signal to the first connection pad and the second connection pad.

[0164] Step 120 : During the heating phase, a first heating voltage signal is applied to the first connection pad, and a second heating voltage signal is applied to the second connection pad, wherein the first heating voltage signal and the second heating voltage signal are different voltage signals.

[0165] Specifically, when the ambient temperature is low, the display panel can periodically perform the actions of the heating stage and the touch stage, and each cycle may include a heating stage and a touch stage, thereby achieving periodic heating, so that the liquid crystal layer is stably maintained within the temperature range required for operation, ensuring that the liquid crystal molecules in the display panel can still respond quickly in a low temperature environment, thereby improving the display effect and display performance of the display panel at low temperatures, but is not limited to this.

[0166] Among them, when the display panel is in the touch stage, the control chip can apply a touch signal to the first connecting pad and the second connecting pad, the touch signal is transmitted to the touch electrode block through the first wire and the second wire, and then the first wire and the second wire receive the touch detection signal fed back by each touch electrode block, and the touch detection signal is then transmitted to the touch chip through the first connecting pad and the second connecting pad, so that the specific position of the touch point can be detected to realize the touch function.

[0167] When the display panel is in the heating stage, the control chip can apply a first heating voltage signal to the first connecting pad and a second heating voltage signal to the second connecting pad, wherein the first heating voltage signal and the second heating voltage signal are different voltage signals, thereby forming a voltage difference at both ends of the heating wiring group, generating current and heat on the heating wiring group, realizing the heating function of the liquid crystal layer, so that the display panel can display normally even in a low temperature environment.

[0168] Optionally, the touch electrode blocks are reused as common electrodes, and the control method provided by the embodiment of the present invention further includes:

[0169] During the display phase, a fixed voltage signal is applied to the connection pad.

[0170] Among them, the touch electrode block can be reused as a common electrode at the same time, that is, the touch electrode block and the common electrode in the display panel have the same structure, and the touch electrode block is used as a touch electrode in the touch stage. At this time, a touch signal can be applied to the touch electrode block to realize the touch function; the touch electrode block is used as a common electrode in the display stage. At this time, a fixed voltage signal can be applied to the touch electrode block, and the fixed voltage signal is the common voltage signal. The common voltage signal and the data signal on the pixel electrode can control the deflection of the liquid crystal in the display panel, so that the display panel can realize the function of displaying images.

[0171] In this embodiment, by reusing the touch electrode block as a common electrode, there is no need to set up an additional common electrode film layer, so that when preparing the display panel, the number of mask plates and the number of process steps can be saved, thereby reducing the preparation cost; at the same time, reducing the setting of one film layer helps to reduce the thickness of the display panel, which is conducive to realizing a lightweight and thin design of the display panel.

[0172] Based on the same inventive concept, an embodiment of the present invention further provides a display device, Fig.24 A schematic diagram of a display device according to an embodiment of the present invention is shown in FIG. Fig.24 As shown, the display device 70 includes the display panel 71 described in any embodiment of the present invention. Therefore, the display device 70 provided in the embodiment of the present invention has the technical effect of the technical solution in any of the above embodiments, and the structures that are the same or corresponding to the above embodiments and the explanation of terms are no longer repeated here.

[0173] The display device 70 provided in the embodiment of the present invention can be Fig.24 The mobile phone shown can also be 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 embodiments of the present invention do not specifically limit this.

[0174] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0175] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A display panel, characterized in that: It comprises an array substrate and an opposite substrate which are arranged opposite to each other, and a liquid crystal layer located between the array substrate and the opposite substrate; The display panel further comprises a display area and a non-display area located at least on one side of the display area; The array substrate comprises a substrate and a plurality of touch electrode blocks arranged in an array, a plurality of wirings and a plurality of connection pads located on one side of the substrate; the touch electrode blocks are located in the display area, and a plurality of the touch electrode blocks are arranged in the same layer, and the connection pads are located in the non-display area; The touch electrode blocks and the routing lines are arranged in different layers, and a plurality of the routing lines are electrically connected to a plurality of the touch electrode blocks in correspondence, and a plurality of the routing lines are electrically connected to a plurality of the connecting pads in a one-to-one correspondence; The plurality of routing lines include a heating routing line group, and one heating routing line group is connected to one touch electrode block through a via hole; The heating wiring group includes a first wiring and a second wiring electrically connected to each other, and the plurality of connecting pads include a first connecting pad and a second connecting pad; the first wiring is electrically connected to the first connecting pad, and the second wiring is electrically connected to the second connecting pad; The heating wiring group is used to transmit touch signals.

2. The display panel according to claim 1, characterized in that: The working stages of the display panel include a touch stage and a heating stage; In the touch control stage, the first connection pad and the second connection pad are used to transmit the touch control signal; In the heating stage, the first connecting pad is used to receive a first heating voltage signal, and the second connecting pad is used to receive a second heating voltage signal, and the first heating voltage signal and the second heating voltage signal are different voltage signals.

3. The display panel according to claim 1, characterized in that: The touch electrode blocks are multiplexed as common electrodes, and the common electrodes are used to receive fixed voltage signals in the display stage.

4. The display panel according to claim 3, characterized in that: The array substrate further comprises a pixel electrode, the pixel electrode is located on a side of the touch electrode block away from the substrate, and the wiring is located on a side of the touch electrode block away from the pixel electrode; Along the thickness direction of the display panel, there is an overlapping area between the pixel electrode, the touch electrode block and the wiring.

5. The display panel according to claim 4, characterized in that: A vertical projection of the touch electrode block on the substrate covers a vertical projection of the pixel electrode on the substrate.

6. The display panel according to claim 1, characterized in that: The plurality of heating line groups are arranged along a first direction, the first lines and the second lines extend along a second direction, and the first direction and the second direction intersect; The lengths of the first wirings of all the heating wiring groups are the same, the lengths of the second wirings of all the heating wiring groups are the same, and the lengths of the first wirings and the second wirings are the same.

7. The display panel according to claim 1, characterized in that: Both ends of the first wiring extend to the non-display area, and both ends of the second wiring extend to the non-display area.

8. The display panel according to claim 6, characterized in that: The display panel further includes a first connecting line extending along the first direction; The first connection pad and the second connection pad are located in the non-display area on the same side of the display area, and the first connection line is located in the non-display area on a side of the display area away from the first connection pad and the second connection pad; The first wiring and the second wiring of the same heating wiring group are electrically connected through the first connecting line.

9. The display panel according to claim 2, characterized in that: A voltage difference between the first heating voltage signal and the second heating voltage signal is a fixed value.

10. The display panel according to claim 9, characterized in that: The touch electrode blocks are reused as common electrodes; The first wiring or the second wiring in the heating wiring group is electrically connected to the touch electrode block through the via hole; The larger the distance between the via and the corresponding first connecting pad, the smaller the first heating voltage signal received by the corresponding first connecting pad during the heating stage, and the smaller the second heating voltage signal received by the corresponding second connecting pad during the heating stage.

11. The display panel according to claim 10, characterized in that: For any of the heating wiring groups, the voltage value of the first heating voltage signal is U1, the voltage value of the second heating voltage signal is U2, U1 = Vcom-ΔU*h / (2*H), U2 = ΔU+Vcom-ΔU*h / (2*H); Among them, Vcom is the voltage value of the common voltage signal, ΔU is the voltage difference between the first heating voltage signal and the second heating voltage signal, h is the distance between the via and the corresponding first connecting pad, and H is the length of the first trace.

12. The display panel according to claim 6, characterized in that: The display panel further includes a second connecting line extending along the first direction; The second connecting line is located in the display area, and the first wiring and the second wiring of the same heating wiring group are electrically connected through the second connecting line.

13. The display panel according to claim 12, characterized in that: A vertical projection of the touch electrode block on the substrate at least partially overlaps with a vertical projection of the second connecting line on the substrate.

14. The display panel according to claim 2, characterized in that: The touch electrode blocks are reused as common electrodes; For any of the heating wiring groups, the voltage value of the first heating voltage signal is U1, the voltage value of the second heating voltage signal is U2, U1=Vcom-(ΔU / 2), U2=Vcom+(ΔU / 2); Wherein, Vcom is the voltage value of the common voltage signal, and ΔU is the voltage difference between the first heating voltage signal and the second heating voltage signal.

15. The display panel according to claim 12, characterized in that: The first wiring and / or the second wiring in the same heating wiring group are electrically connected to the touch electrode block through the via hole.

16. The display panel according to claim 12, characterized in that: The second connection line is located at a side of the via hole close to the first connection pad; or, The second connection line is located at a side of the via hole away from the first connection pad.

17. The display panel according to claim 12, characterized in that: The heating wiring group is electrically connected to the touch electrode block through at least two of the via holes; Along the second direction, at least two of the via holes are distributed on both sides of the second connecting line.

18. The display panel according to claim 12, characterized in that: The display area includes a plurality of sub-pixels arranged in an array, and the sub-pixels include a light-emitting area and a wiring area surrounding the light-emitting area; The second connecting line is located in the routing area.

19. The display panel according to claim 1, characterized in that: The display panel includes a plurality of sub-pixels arranged in an array, and the sub-pixels include a light-emitting area and a wiring area surrounding the light-emitting area; At least one of the routing line and the via hole is located in the routing area.

20. The display panel according to claim 1, characterized in that: The plurality of routing lines further include a third routing line, the plurality of connecting pads further include a third connecting pad, and the third routing line is electrically connected to the third connecting pad; In the touch control stage, the third connecting pad is used to transmit the touch control signal; In the heating stage, the third connecting pad is used to receive a fixed voltage signal.

21. The display panel according to claim 20, characterized in that: The touch electrode blocks are reused as common electrodes; The fixed voltage signal is a common voltage signal.

22. The display panel according to claim 20, characterized in that: The first routing line, the second routing line and the third routing line are arranged along a first direction and extend along a second direction, and the first direction and the second direction intersect.

23. The display panel according to claim 22, characterized in that: Along the first direction, the third routing line is located between the first routing line and the second routing line in the same heating routing line group, and / or the third routing line is located between adjacent heating routing line groups.

24. The display panel according to claim 1, characterized in that: The plurality of heating wiring groups are evenly distributed in the display area.

25. The display panel according to claim 1, characterized in that: The plurality of wirings are evenly distributed in the display area.

26. The display panel according to claim 1, characterized in that: The display area includes a plurality of sub-pixels arranged in an array, the sub-pixels include a pixel driving circuit, and the pixel driving circuit includes at least one transistor; The transistor comprises an active layer, a gate layer and a source-drain electrode layer stacked on one side of the substrate; The wiring is arranged in the same layer as the gate layer or the source-drain electrode layer.

27. The display panel according to claim 1, characterized in that: The heating wiring group is electrically connected to the touch electrode block through a plurality of the via holes.

28. A method for controlling a display panel, characterized in that: For the display panel according to any one of claims 1 to 27, the control method comprises: In a touch control stage, applying the touch control signal to the first connecting pad and the second connecting pad; In the heating stage, a first heating voltage signal is applied to the first connecting pad, and a second heating voltage signal is applied to the second connecting pad, wherein the first heating voltage signal and the second heating voltage signal are different voltage signals.

29. The control method according to claim 28, characterized in that: The touch electrode blocks are reused as common electrodes, and the control method further includes: In the display stage, a fixed voltage signal is applied to the connection pad.

30. A display device, characterized in that: A display panel comprising any one of claims 1-27.

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