Display panel and display device

Abstract

The present application discloses a display panel and a display device, wherein the display panel includes a substrate, a light-emitting unit layer, a pixel definition layer, an encapsulation layer, a touch electrode layer, a touch driving layer and a plurality of touch connection lines, wherein the light-emitting unit layer is arranged on the substrate, and includes a plurality of light-emitting units arranged in an array; the pixel definition layer is arranged on the substrate, and two adjacent light-emitting units are separated by the pixel definition layer; the encapsulation layer is arranged on the light-emitting unit layer, and is used to encapsulate the light-emitting unit layer; the touch electrode layer is arranged in the encapsulation layer; the touch driving layer is arranged between the substrate and the light-emitting unit layer; and a plurality of touch connection lines are arranged in the encapsulation layer and the pixel definition layer, and are used to connect the touch electrode layer and the touch driving layer. By arranging the touch electrode in the encapsulation layer, the touch accuracy is improved without reducing the encapsulation strength.

Description

Technical Field

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

[0002] With the continuous development of OLED (Organic Light-Emitting Diode) display technology, OLED is increasingly used in displays such as smartphones, tablets, computers, and televisions. The touch function of general display panels is implemented in the following ways: resistive, capacitive, surface acoustic wave, infrared optical imaging, and electromagnetic induction. At present, the most mature display industry is capacitive, which is divided into mutual capacitance and self-capacitive according to the capacitance detection signal. The self-capacitive touch screen uses the capacitance change of a single electrode to transmit charge, with one end connected to the ground and the other end connected to the excitation or sampling circuit to realize the recognition of capacitance. The mutual capacitance capacitive screen uses two electrodes to transmit charge, with one end connected to the excitation and the other end connected to the sampling circuit to realize the recognition of capacitance. The advantages of self-capacitance are simplicity and small amount of calculation, and the disadvantages are single point and slow speed; the advantages of mutual capacitance are real multi-point and fast speed, and the disadvantages are complexity, high power consumption, and high cost. Embedded touch technology (In-cellTouch) mainly integrates touch into the display panel, and the driver design architecture of touch is generally integrated in the panel driver IC. On-cell touch technology is to place the touch control outside the display panel and use an external drive circuit to drive it. Due to the difference in capacitor design, self-capacitive is mostly used in embedded touch technology products, while mutual-capacitive is used in off-cell touch technology products.

[0003] Relatively speaking, the current In-cell touch technology has obvious advantages over On-cell Touch technology, such as reduced thickness, lower cost, lighter weight, lower power consumption, etc. However, how to set the touch electrodes in the In-cell touch technology to improve the touch accuracy without affecting the internal film layer of the display panel has become a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0004] The purpose of the present application is to provide a display panel and a display device, which can improve the touch accuracy without reducing the packaging strength by arranging the touch electrodes in the packaging layer.

[0005] The present application discloses a display panel, which includes a base substrate, a light-emitting unit layer, a pixel definition layer, an encapsulation layer, a touch electrode layer, a touch drive layer and a plurality of touch connection lines, wherein the light-emitting unit layer is arranged on the base substrate, and includes a plurality of light-emitting units arranged in an array; the pixel definition layer is arranged on the base substrate, and two adjacent light-emitting units are separated by the pixel definition layer; the encapsulation layer is arranged on the light-emitting unit layer, and is used to encapsulate the light-emitting unit layer; the touch electrode layer is arranged in the encapsulation layer; the touch drive layer is arranged between the base substrate and the light-emitting unit layer; and a plurality of touch connection lines are passed through the encapsulation layer and the pixel definition layer, and are used to connect the touch electrode layer and the touch drive layer.

[0006] Optionally, the touch electrode layer is formed of a composite material of carbon nanotubes and organic polymers.

[0007] Optionally, the encapsulation layer includes a first inorganic layer, an organic encapsulation layer and a second inorganic layer, the first inorganic layer is arranged on the light-emitting unit layer, the organic encapsulation layer is arranged on the first inorganic layer, and the second inorganic layer is arranged on the organic encapsulation layer; the touch electrode layer is arranged between the first inorganic layer and the second inorganic layer.

[0008] Optionally, the pixel definition layer is provided with a first through hole, and the first inorganic layer is provided with a third through hole corresponding to the first through hole; the touch connection line is passed through the first through hole and the third through hole, and is used to connect the touch drive layer and the touch electrode layer.

[0009] Optionally, the organic encapsulation layer includes a first organic layer and a second organic layer, the first organic layer is arranged on the first inorganic layer, and the second organic layer is arranged on the first organic layer; the touch electrode layer is arranged between the first organic layer and the second organic layer.

[0010] Optionally, the thickness of the first organic layer is less than the thickness of the second organic layer; wherein the thickness of the first organic layer is less than or equal to 10um and greater than or equal to 3um; and the thickness of the organic encapsulation layer is less than or equal to 30um and greater than or equal to 10um.

[0011] Optionally, the light-emitting unit includes a bottom electrode, a light-emitting layer and a top electrode; the light-emitting layer is arranged between the bottom electrode and the top electrode, the top electrodes of adjacent light-emitting units are electrically connected, and the first inorganic layer is arranged on the top electrode; a first through hole is arranged on the pixel definition layer, a second through hole is arranged on the top electrode corresponding to the first through hole, a third through hole is arranged on the first inorganic layer corresponding to the second through hole, and a fourth through hole is arranged on the first organic layer corresponding to the third through hole; the touch connection line is passed through the fourth through hole, the third through hole, the second through hole and the first through hole, and is used to connect the touch drive layer and the touch electrode layer.

[0012] Optionally, the aperture of the third through hole is smaller than the aperture of the second through hole; the first inorganic layer fills the second through hole, and the third through hole extends into the second through hole and is connected to the first through hole; the touch connection line is isolated from the top electrode by the first inorganic layer; wherein the part of the touch connection line located in the first through hole and the second through hole is formed by the material of the bottom electrode or the top electrode, and the part located in the third through hole and the fourth through hole is formed by a composite material of carbon nanotubes and organic polymers.

[0013] Optionally, the touch electrode layer includes a plurality of touch electrodes, each of which is arranged corresponding to a plurality of light-emitting units; and each of the touch electrodes is connected to the touch driving layer via at least two touch connection lines.

[0014] The present application also discloses a display device, comprising a driving circuit and the above-mentioned display panel, wherein the driving circuit drives the display panel to display.

[0015] The present application arranges the touch electrode layer in the encapsulation layer. On the one hand, the insulation characteristics and thickness of the encapsulation layer are used to prevent the touch electrode layer from affecting the light-emitting unit, and at the same time, the interference of the cathode of the light-emitting unit on the touch signal is reduced, and the encapsulation layer is used to insulate and block the touch electrode layer. On the other hand, the touch electrode layer is arranged inside the encapsulation layer. Without affecting the encapsulation effect of the encapsulation layer, the touch connection line is selected to pass through the encapsulation layer and the pixel definition layer, so that the touch drive layer and the touch electrode layer can be connected. The problem of driving wiring of the touch electrode layer in the encapsulation layer is solved by perforating, and the impact on the encapsulation layer is small. In addition, the touch drive layer is arranged on the substrate, and there is no need to touch the touch drive circuit outside the touch electrode layer, so that the touch accuracy is improved without reducing the encapsulation strength, thereby improving the quality of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0017] Figure 1 is a schematic diagram of a display panel according to a first embodiment of the present application;

[0018] Figure 2 is a schematic top view of a touch electrode according to a first embodiment of the present application;

[0019] Figure 3 is a schematic diagram of a first display panel of a second embodiment of the present application;

[0020] Figure 4 is a schematic diagram of a second display panel of a second embodiment of the present application;

[0021] Figure 5 is a schematic diagram of a display device of the present application.

[0022] Among them, 100, display panel; 110, base substrate; 120, light-emitting unit; 121, bottom electrode; 122, light-emitting layer; 123, top electrode; 130, pixel definition layer; 131, first through hole; 132, second through hole; 133, third through hole; 134, fourth through hole; 140, encapsulation layer; 141, first inorganic layer; 142, second inorganic layer; 143, organic encapsulation layer; 144, first organic layer; 145, second organic layer; 150, touch electrode layer; 151, touch electrode; 160, touch drive layer; 170, touch connection line; 200, display device; 210, drive circuit. DETAILED DESCRIPTION

[0023] It should be understood that the terms used herein, the specific structures and functional details disclosed are only for describing specific embodiments and are representative, but the present application can be implemented in many alternative forms and should not be construed as being limited to only the embodiments described herein.

[0024] In the description of the present application, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, unless otherwise specified, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; "multiple" means two or more. In addition, the terms "upper", "lower", "left", "right", "vertical", "horizontal", etc. indicating orientation or positional relationships are described based on the orientation or relative positional relationships shown in the accompanying drawings, and are only for the convenience of describing the simplified description of the present application, rather than indicating that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0025] The present application is described in detail below with reference to the accompanying drawings and optional embodiments.

[0026] Figure 1 is a schematic diagram of a display panel of the first embodiment of the present application, see Figure 1 As shown, the present application discloses a display panel 100, which includes a base substrate 110, a light-emitting unit layer, a pixel definition layer 130, an encapsulation layer 140, a touch electrode layer 150, a touch drive layer 160 and a plurality of touch connection lines 170, wherein the light-emitting unit layer is arranged on the base substrate 110, and includes a plurality of light-emitting units 120 arranged in an array; the pixel definition layer 130 is arranged on the base substrate 110, and two adjacent light-emitting units 120 are separated by the pixel definition layer 130; the encapsulation layer 140 is arranged on the light-emitting unit layer, and is used to encapsulate the light-emitting unit layer; the touch electrode layer 150 is arranged in the encapsulation layer 140; the touch drive layer 160 is arranged between the base substrate 110 and the light-emitting unit layer; and the plurality of touch connection lines 170 are passed through the encapsulation layer 140 and the pixel definition layer 130, and are used to connect the touch electrode layer 150 and the touch drive layer 160.

[0027] The present application arranges the touch electrode layer 150 inside the encapsulation layer 140. On the one hand, the insulation characteristics and thickness of the encapsulation layer 140 are used to prevent the touch electrode layer 150 from affecting the light-emitting unit 120, and at the same time, the interference of the cathode of the light-emitting unit 120 on the touch signal is reduced, and the touch electrode layer 150 is insulated and blocked by the encapsulation layer 140. On the other hand, the touch electrode layer 150 is arranged inside the encapsulation layer 140. Without affecting the encapsulation effect of the encapsulation layer 140, the touch connection line 170 is selected to penetrate the encapsulation layer 140 and the pixel definition layer 130, so that the touch driving layer 160 and the touch electrode layer 150 can be connected. By perforating, the driving routing problem of the touch electrode layer 150 inside the encapsulation layer 140 is solved, and the impact on the encapsulation layer 140 is small. Furthermore, the touch driving layer 160 is disposed on the base substrate 110 , and there is no need to provide an external touch driving circuit to the touch electrode layer 150 , thereby improving the touch accuracy without reducing the packaging strength, thereby improving the quality of the display panel 100 .

[0028] The embodiment of the present application is an application of embedded touch technology. For the display panel 100, the embedded touch technology is to embed the touch function into the display panel 100. Generally, a transparent conductive layer (ITO) can be used as the touch electrode layer 150 to enable the display panel 100 to have touch capability. Since a touch drive layer 160 can be formed on the substrate of the display panel 100, compared with the external touch technology, an external touch drive circuit is not required, and the touch electrode layer 150 does not need to be set outside the panel, thereby achieving the effect of reducing the thickness. For the OLED display panel 100, generally only the external touch technology can be used, and the touch electrode layer 150 is formed by a transparent conductive layer and is set on the protective cover plate or below the protective layer of the encapsulation layer 140. If the embedded touch technology is to be implemented, since it is set on the encapsulation layer 140, an independent drive circuit is required for driving. For the self-capacitive touch solution, it is necessary to transmit touch signals or collect sampling signals through the touch drive layer 160 to realize the recognition of the capacitance change of the touch electrode layer 150. Therefore, the touch drive layer 160 is indispensable. The embedded touch technology mentioned in the embodiment of the present application refers to setting the touch drive layer 160 of the touch electrode layer 150 on the base substrate 110 of the display panel 100, and realizing that the driving circuit of the touch function can be integrated into the display panel 100 by means of the touch connection line 170.

[0029] In a specific embodiment, the encapsulation layer 140 includes a first inorganic layer 141, an organic encapsulation layer 143 and a second inorganic layer 142, the first inorganic layer 141 is arranged on the light-emitting unit layer, the organic encapsulation layer 143 is arranged on the first inorganic layer 141, and the second inorganic layer 142 is arranged on the organic encapsulation layer 143; the touch electrode layer 150 is arranged between the first inorganic layer 141 and the second inorganic layer 142.

[0030] The light-emitting unit 120 includes a bottom electrode 121, a light-emitting layer 122 and a top electrode 123. The bottom electrode 121 is disposed on the base substrate 110, the light-emitting layer 122 is disposed between the bottom electrode 121 and the top electrode 123, the first inorganic layer 141 is disposed on the top electrode 123, the top electrode 123 is generally a cathode, and the bottom electrode 121 is generally an anode. The anode is generally formed of a metal material, and the cathodes of adjacent light-emitting units 120 are electrically connected.

[0031] For the OLED display panel 100, the encapsulation layer 140 generally adopts a laminated encapsulation method of inorganic materials and organic materials. In this solution, by disposing the touch electrode layer 150 between the first inorganic layer 141 and the second inorganic layer 142, the first inorganic layer 141 is used to isolate the touch electrode layer 150 from the cathode of the light-emitting unit 120, thereby preventing the touch signal of the touch electrode layer 150 from being interfered by the signal of the cathode.

[0032] Specifically, the pixel definition layer 130 is provided with a first through hole 131, and the first inorganic layer 141 is provided with a third through hole 133 corresponding to the first through hole 131; the touch connection line 170 is passed through the first through hole 131 and the third through hole 133, and is used to connect the touch driving layer 160 and the touch electrode layer 150.

[0033] In this embodiment, through holes can be formed on the pixel definition layer 130 and the first inorganic layer 141 by laser drilling or photolithography drilling, and the touch electrode layer 150 is connected to the touch driving layer 160 by the touch connection line 170 penetrating the first through hole 131 and the third through hole 133. Among them, in the photolithography drilling method, the touch connection line 170 can be formed of the same material as the bottom electrode 121 or the top electrode 123. For example, in the first through hole 131 of the pixel definition layer 130, the first through hole 131 can be formed on the pixel definition layer 130 before the bottom electrode 121 is formed, and in the process of manufacturing the bottom electrode 121, the first through hole 131 is filled with a wiring of the bottom electrode 121 material, and the wiring is directly connected to the touch driving layer 160 through the first through hole 131.

[0034] It can be understood that a pixel driving layer is further included between the base substrate 110 and the light emitting unit layer in the embodiment of the present application, and the pixel driving layer is used to drive the plurality of light emitting units 120 to emit light. In one embodiment, the pixel driving layer and the touch driving layer 160 can be arranged in the same layer, and a stacking arrangement of multiple metal layers and insulating layers is adopted to form the pixel driving layer and the touch driving layer 160. Among them, the touch driving layer 160 is insulated from the bottom electrode 121 by an insulating layer.

[0035] Of course, in this embodiment, the touch electrode layer 150 can be located above or below the organic encapsulation layer 143, which can be selected according to actual conditions. Two points are mainly considered. First, when the thickness of the first inorganic layer 141 is small, the touch electrode layer 150 is easily disturbed by the cathode. In this regard, the organic encapsulation layer 143 can be set below the touch electrode layer 150. Second, the touch electrode layer 150 needs to be connected to the touch driving layer 160 through the touch connection line 170 through the multi-layer film structure. When the thickness of the film between the touch electrode layer 150 and the touch driving layer 160 is thicker, the length of the touch connection line 170 used will be longer, and the hole will be deeper, resulting in increased process difficulty. In this case, the touch electrode layer 150 can be set between the organic encapsulation layer 143 and the first inorganic layer 141. Of course, in another embodiment, the thickness of the first inorganic layer 141 can be increased to improve the insulation effect between the touch electrode layer 150 and the top electrode 123 of the light-emitting unit 120.

[0036] In one embodiment, if the touch electrode layer 150 is formed of a transparent conductive layer (ITO) material, due to the material problem of the transparent conductive layer, the chemical properties are unstable, resulting in a decrease in the interface strength between the organic encapsulation layer 143 and the encapsulation strength of the encapsulation layer 140 is easily reduced.

[0037] Based on the above, the touch electrode layer 150 in the embodiment of the present application is formed by a composite material of carbon nanotubes and organic polymers. The structure of carbon nanotubes (CNT) is the same as the lamellar structure of graphite, and has good electrical conductivity. And the resistance of carbon nanotubes is not limited by the factors of length and diameter, which can minimize the problem of uneven impedance caused by wiring. Generally speaking, electrons do not generate heat when passing through carbon nanotubes. The transmission of electrons in carbon nanotubes is just like the transmission of light signals in optical fiber cables, with little energy loss, so it has high conductivity. Carbon nanotubes are chemically stable and have acid and alkali resistance. Since carbon nanotubes have a structure similar to that of polymers, they can be compounded with organic polymers to form high-performance composite materials. Therefore, carbon nanotubes and organic polymers are used for compounding to prepare highly conductive composite materials. The chemical properties of the composite material are similar to those of organic polymers, with surface inertness and greater elasticity, and light transmittance, with a light transmittance of at least 85% or more.

[0038] In this solution, since the composite material is chemically inert and has relatively stable chemical properties, the packaging strength will not be reduced. In addition, since the composite material uses an organic polymer as a substrate, the interface strength between the touch electrode layer 150 and the organic packaging layer 143 is relatively large, and there will be no large interface defects. Specifically, the thickness of the touch electrode layer 150 is about 1000 angstroms to 1500 angstroms.

[0039] The touch electrode layer 150 of the present application is provided with a plurality of touch electrodes 151, and the plurality of touch electrodes 151 are respectively connected to the touch driving layer 160 through correspondingly connected touch connection lines 170. The touch driving layer 160 is provided with a plurality of touch driving lines, which are respectively connected to the plurality of touch electrodes 151 to realize the touch function.

[0040] Figure 2 is a top view schematic diagram of the touch electrode of the first embodiment of the present application, see Figure 2 As shown, the touch electrode layer 150 includes a plurality of touch electrodes 151, and each touch electrode 151 is not electrically connected to each other. Each of the touch electrodes 151 is connected to the touch driving layer 160 via at least two touch connection lines 170, that is, each touch electrode 151 is connected to a plurality of touch connection lines 170, and the plurality of touch connection lines 170 are correspondingly connected to the same touch driving line.

[0041] Among them, the multiple light-emitting units 120 respectively include multiple red light-emitting units 120, multiple green light-emitting units 120 and multiple blue light-emitting units 120, each adjacent red light-emitting unit 120, one green light-emitting unit 120 and one blue light-emitting unit 120 constitute a pixel, and each touch electrode 151 can cover at least one pixel setting, that is, each touch electrode 151 covers at least three light-emitting unit 120 settings.

[0042] In this embodiment, when the area of ​​the touch electrode 151 is larger, the number of corresponding touch connection lines 170 is larger, and one touch electrode 151 covers four light-emitting units 120, and at least five touch connection lines 170 can be configured. That is, within the projection range of one touch electrode 151, at least five first through holes 131 and second through holes 132 are provided to set the touch connection lines 170. The setting position of the touch connection line 170 can be located on the pixel definition layer 130 between adjacent light-emitting units 120, or located in the middle of the four light-emitting units 120, which is not limited here.

[0043] In this embodiment, the touch electrode 151 formed of a composite material of carbon nanotubes and organic polymers is arranged between the first inorganic layer 141 and the second inorganic layer 142, and the touch connection line 170 is arranged by using the first through hole 131 and the third through hole 133, so that the touch electrode 151 is connected to the touch driving layer 160 through the touch connection line 170. When the touch driving line in the touch driving layer 160 outputs an excitation signal, the capacitance formed between the touch electrode layer 150 and the cathode layer is recognized according to the adopted circuit. When the capacitance of the corresponding area changes by a preset value, it is determined to be a touch, and the next operation is performed. The advantage of this embodiment is that the touch accuracy of the display panel 100 is improved without affecting the packaging effect of the packaging layer 140.

[0044] Figure 3 is a schematic diagram of a first display panel of the second embodiment of the present application, see Figure 3As shown, the present application discloses a display panel 100, which includes a base substrate 110, a light-emitting unit layer, a pixel definition layer 130, an encapsulation layer 140, a touch electrode layer 150, a touch drive layer 160 and a plurality of touch connection lines 170, wherein the light-emitting unit layer is arranged on the base substrate 110, and includes a plurality of light-emitting units 120 arranged in an array; the pixel definition layer 130 is arranged on the base substrate 110, and two adjacent light-emitting units 120 are separated by the pixel definition layer 130; the encapsulation layer 140 is arranged on the light-emitting unit layer, and is used to encapsulate the light-emitting unit layer; the touch electrode layer 150 is arranged in the encapsulation layer 140; the touch drive layer 160 is arranged between the base substrate 110 and the light-emitting unit layer; and the plurality of touch connection lines 170 are passed through the encapsulation layer 140 and the pixel definition layer 130, and are used to connect the touch electrode layer 150 and the touch drive layer 160.

[0045] The encapsulation layer 140 includes a first inorganic layer 141, a first organic layer 144, a second organic layer 145, and a second inorganic layer 142. The first inorganic layer 141 is disposed on the light-emitting unit layer, specifically, the first inorganic layer 141 is disposed on the top electrode 123. The first organic layer 144 is disposed on the first inorganic layer 141, the second organic layer 145 is disposed on the first organic layer 144, and the second inorganic layer 142 is disposed on the second organic layer 145. The touch electrode layer 150 is disposed between the first organic layer 144 and the second organic layer 145, and the material of the touch electrode layer 150 is formed of a composite material of carbon nanotubes and organic polymers.

[0046] Different from the previous embodiment, in this embodiment, the touch electrode layer 150 is disposed in the organic encapsulation layer 143, and the organic encapsulation layer 143 is divided into a second organic layer 145 disposed on the touch electrode layer 150 and a first organic layer 144 disposed under the touch electrode layer 150. In this embodiment, considering that the thickness of the first inorganic layer 141 usually cannot be increased, and the touch electrode layer 150 is formed of a composite material of an organic polymer, relatively speaking, when both sides of the touch electrode layer 150 are the organic encapsulation layer 143, the touch electrode layer 150 has the least effect on the overall encapsulation effect of the encapsulation layer 140.

[0047] Specifically, the thickness of the touch electrode layer 150 is about 1000 angstroms to 1500 angstroms, and the thickness of the first organic layer 144 is less than the thickness of the second organic layer 145. Generally speaking, the thickness of the organic encapsulation layer 143 below the touch electrode layer 150 should be greater than or equal to 3um to ensure that the touch signal will not be interfered by the cathode. At the same time, since it is necessary to drill downwards to connect with the touch drive layer 160 on the base substrate 110, when its thickness is large, it will affect the accuracy of the drilling process and increase the difficulty of drilling. Therefore, the thickness of the organic encapsulation layer 143 is less than or equal to 30um and greater than or equal to 10um; the thickness of the first organic layer 144 is less than or equal to 10um and greater than or equal to 3um.

[0048] Specifically, a first through hole 131 is provided on the pixel definition layer 130, a second through hole 132 is provided on the top electrode 123 corresponding to the first through hole 131, a third through hole 133 is provided on the first inorganic layer 141 corresponding to the second through hole 132, and a fourth through hole 134 is provided on the first organic layer 144 corresponding to the third through hole 133; the touch connection line 170 is passed through the fourth through hole 134, the third through hole 133, the second through hole 132 and the first through hole 131, and is used to connect the touch drive layer 160 and the touch electrode layer 150.

[0049] In this solution, the touch connection line 170 needs to pass through the first organic layer 144, the first inorganic layer 141, the top electrode 123, and the pixel definition layer 130 in sequence from the touch electrode layer 150 and then be connected to the touch driving layer 160. For the top electrode 123, that is, the cathode, it is necessary to perform insulation treatment between it and the touch connection line 170, which can be achieved by filling the first inorganic layer 141 in the second through hole 132 and extending the third through hole 133 of the first inorganic layer 141 into the second through hole 132. Relatively speaking, the aperture of the third through hole 133 needs to be smaller than the aperture of the second through hole 132.

[0050] Specifically, the aperture of the third through hole 133 is smaller than the aperture of the second through hole 132; the first inorganic layer 141 fills the second through hole 132, and the third through hole 133 extends into the second through hole 132 and is connected to the first through hole 131; the touch connection line 170 and the top electrode 123 are isolated by the first inorganic layer 141.

[0051] In one embodiment, the touch connection line 170 is made of a composite material of carbon nanotubes and organic polymers. In this embodiment, although the composite material has a high conductivity, it can be used for signal transmission, which can reduce the signal loss of the touch connection line 170 multi-layer switching. However, the drilling cost and process are relatively higher, and laser drilling is required after each film layer is completed. After the drilling is completed, the touch electrode layer 150 and the touch connection line 170 are formed, and then the second organic layer 145 and other subsequent processes are formed.

[0052] Figure 4 is a schematic diagram of a second display panel of the second embodiment of the present application, see Figure 4 As shown, the difference between this embodiment and the previous embodiment lies in the different materials of the touch connection line 170 and the punching process. Specifically, the portion of the touch connection line 170 located in the first through hole 131 and the second through hole 132 is formed of the same material as the bottom electrode 121 or the top electrode 123, and the portion located in the third through hole 133 and the fourth through hole 134 is formed of a composite material of carbon nanotubes and organic polymers.

[0053] In this solution, a conventional photolithography drilling solution can be used. Specifically, after the process of the pixel definition layer 130 is completed on the base substrate 110, a first through hole 131 is formed on the pixel definition layer 130, and the bottom electrode 121 of the light-emitting unit 120 is formed between the pixel definition layers 130. The bottom electrode 121 material is filled in the first through hole 131 to serve as part of the touch connection line 170. After the process of the light-emitting layer 122 of the light-emitting unit 120 is completed, when the top electrode 123 is formed, part of the top electrode 123 material is used to fill the first through hole 131. At this time, the top electrode 123 and the touch connection line 170 in the first through hole 131 are in an electrically connected state. By adopting the photolithography process, a second through hole 132 is formed on the top electrode 123, so that the top electrode 123 and the touch connection line 170 in the first through hole 131 are in a disconnected state. After the film processes of the first inorganic layer 141 and the first organic layer 144 are completed, the third through hole 133 and the fourth through hole 134 are formed, and the composite material of carbon nanotubes and organic polymer is filled in the third through hole 133 and the fourth through hole 134 to form the touch connection line 170 .

[0054] In this embodiment, the touch electrode 151 formed of a composite material of carbon nanotubes and organic polymers is disposed between the first organic layer 144 and the second organic layer 145, and the touch connection line 170 is disposed by using the first through hole 131, the second through hole 132, the third through hole 133, and the fourth through hole 134, so that the touch electrode 151 is connected to the touch driving layer 160 through the touch connection line 170. That is, the touch electrode layer 150 is formed in the encapsulation layer 140, and is driven by the touch driving layer 160 on the base substrate 110 of the display panel 100, and the signal is transmitted by the touch connection line 170 through the punching process to realize the touch function. The solution of this embodiment can improve the accuracy of touch control without reducing the strength of the encapsulation.

[0055] Figure 5 is a schematic diagram of the display device of the present application, see Figure 5 As shown, the present application further discloses a display device, wherein the display device 200 includes a driving circuit 210 and a display panel 100 in any one of the above embodiments, and the driving circuit 210 drives the display panel 100 to display.

[0056] The present application arranges the touch electrode layer 150 inside the encapsulation layer 140. On the one hand, the insulation characteristics and thickness of the encapsulation layer 140 are used to prevent the touch electrode layer 150 from affecting the light-emitting unit 120, and at the same time, the interference of the cathode of the light-emitting unit 120 on the touch signal is reduced, and the touch electrode layer 150 is insulated and blocked by the encapsulation layer 140. On the other hand, the touch electrode layer 150 is arranged inside the encapsulation layer 140. Without affecting the encapsulation effect of the encapsulation layer 140, the touch connection line 170 is selected to penetrate the encapsulation layer 140 and the pixel definition layer 130, so that the touch driving layer 160 and the touch electrode layer 150 can be connected. By perforating, the driving routing problem of the touch electrode layer 150 inside the encapsulation layer 140 is solved, and the impact on the encapsulation layer 140 is small. Furthermore, the touch driving layer 160 is disposed on the base substrate 110 , and there is no need to provide an external touch driving circuit to the touch electrode layer 150 , thereby improving the touch accuracy without reducing the packaging strength, thereby improving the quality of the display panel 100 .

[0057] It should be noted that the inventive concept of the present application can form a large number of embodiments, but the length of the application document is limited and it is impossible to list them one by one. Therefore, under the premise of no conflict, the embodiments or technical features described above can be arbitrarily combined to form new embodiments. After the embodiments or technical features are combined, the original technical effects will be enhanced.

[0058] The above content is a further detailed description of the present application in combination with specific optional implementation methods, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, several simple deductions or substitutions can be made without departing from the concept of the present application, which should be deemed to fall within the scope of protection of the present application.

Claims

1. A display panel, characterized in that: include: substrate substrate; A light emitting unit layer, arranged on the base substrate, comprising a plurality of light emitting units arranged in an array; A pixel definition layer is provided on the base substrate, and two adjacent light emitting units are separated by the pixel definition layer; An encapsulation layer, disposed on the light-emitting unit layer, and used for encapsulating the light-emitting unit layer; as well as A touch electrode layer, disposed in the packaging layer, the touch electrode layer comprising a plurality of touch electrodes, each of the touch electrodes being disposed corresponding to a plurality of light-emitting units; A touch driving layer, disposed between the base substrate and the light emitting unit layer; A plurality of touch connection lines are arranged in the encapsulation layer and the pixel definition layer, and are used to connect the touch electrode layer and the touch drive layer, and each of the touch electrodes is connected to the touch drive layer through at least two of the touch connection lines; A pixel driving layer is further arranged between the base substrate and the light-emitting unit layer, and the pixel driving layer is used to drive the plurality of light-emitting units to emit light, and the pixel driving layer and the touch driving layer are arranged in the same layer; The encapsulation layer includes a first inorganic layer, an organic encapsulation layer, and a second inorganic layer, wherein the first inorganic layer is disposed on the light-emitting unit layer, the organic encapsulation layer is disposed on the first inorganic layer, and the second inorganic layer is disposed on the organic encapsulation layer; the touch electrode layer is disposed between the first inorganic layer and the second inorganic layer; The pixel definition layer is provided with a first through hole, and the first inorganic layer is provided with a third through hole corresponding to the first through hole; the touch connection line is passed through the first through hole and the third through hole, and is used to connect the touch driving layer and the touch electrode layer; Wherein, the touch electrode layer is formed of a composite material of carbon nanotubes and organic polymers; and the touch connection line is at least partially formed of a composite material of carbon nanotubes and organic polymers.

2. The display panel according to claim 1, characterized in that: The organic encapsulation layer includes a first organic layer and a second organic layer, the first organic layer is disposed on the first inorganic layer, and the second organic layer is disposed on the first organic layer; The touch electrode layer is disposed between the first organic layer and the second organic layer.

3. The display panel according to claim 2, characterized in that: The thickness of the first organic layer is smaller than the thickness of the second organic layer; The thickness of the first organic layer is less than or equal to 10 um and greater than or equal to 3 um; the thickness of the organic encapsulation layer is less than or equal to 30 um and greater than or equal to 10 um.

4. The display panel according to claim 2, characterized in that: The light-emitting unit comprises a bottom electrode, a light-emitting layer and a top electrode; The light-emitting layer is arranged between the bottom electrode and the top electrode, the top electrodes of adjacent light-emitting units are electrically connected, and the first inorganic layer is arranged on the top electrode; The pixel definition layer is provided with a first through hole, the top electrode is provided with a second through hole corresponding to the first through hole, the first inorganic layer is provided with a third through hole corresponding to the second through hole, and the first organic layer is provided with a fourth through hole corresponding to the third through hole; The touch connection line passes through the fourth through hole, the third through hole, the second through hole and the first through hole, and is used to connect the touch driving layer and the touch electrode layer.

5. The display panel according to claim 4, characterized in that: The aperture of the third through hole is smaller than that of the second through hole; the first inorganic layer is filled in the second through hole, the third through hole extends into the second through hole and is connected to the first through hole; the touch connection line is isolated from the top electrode by the first inorganic layer; Parts of the touch connection line located in the first through hole and the second through hole are formed of the material of the bottom electrode or the top electrode, and parts located in the third through hole and the fourth through hole are formed of a composite material of carbon nanotubes and organic polymers.

6. A display device, characterized in that: It comprises a driving circuit and the display panel according to any one of claims 1 to 5, wherein the driving circuit drives the display panel to display.

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