Display panel, display device and manufacturing method of display panel

Abstract

The embodiment of the invention provides a display panel, a display device and a manufacturing method of the display panel, and the display panel, the display panel comprises a substrate, a functional layer and a pixel definition layer, the functional layer is arranged on one side of the substrate, and the functional layer comprises a first electrode and a pressure-sensitive electrode which are arranged at an interval; the pixel defining layer is arranged on the side, away from the substrate, of the functional layer, the pixel defining layer comprises a pixel limiting part and a pixel opening formed in the pixel limiting part, the pixel opening is used for containing the light-emitting unit, and the orthographic projection of the pixel opening and the orthographic projection of the first electrode on the substrate are at least partially overlapped; orthographic projections of the pixel limiting part and the pressure-sensitive electrode on the substrate are at least partially overlapped. The pressure-sensitive electrode and the first electrode are arranged on the same layer, so that the thickness of the display panel is reduced, and the use performance of the display panel is improved.

Description

Technical Field

[0001] The present application relates to the technical field of display devices, and in particular to a display panel, a display device, and a method for manufacturing a display panel. Background Art

[0002] Organic Light Emitting Diode (OLED) and flat panel display devices based on technologies such as Light Emitting Diode (LED) have been widely used in various consumer electronic products such as mobile phones, televisions, laptops, desktop computers, etc. due to their advantages such as high image quality, power saving, thin body and wide application range, becoming the mainstream in display devices.

[0003] However, the performance of current display products needs to be improved. Summary of the invention

[0004] The embodiments of the present application provide a display panel, a display device and a method for manufacturing a display panel, aiming to improve the performance of the display panel.

[0005] An embodiment of the first aspect of the present application provides a display panel, comprising: a substrate, a functional layer and a pixel definition layer, wherein the functional layer is arranged on one side of the substrate, and the functional layer comprises a first electrode and a pressure-sensitive electrode arranged at intervals; the pixel definition layer is arranged on a side of the functional layer away from the substrate, the pixel definition layer comprises a pixel defining portion and a pixel opening opened in the pixel defining portion, the pixel opening is used to accommodate a light-emitting unit, the orthographic projection of the pixel opening on the substrate and the orthographic projection of the first electrode on the substrate at least partially overlap, and the orthographic projection of the pixel defining portion on the substrate and the orthographic projection of the pressure-sensitive electrode on the substrate at least partially overlap.

[0006] In some embodiments of the present application, the functional layer includes multiple pressure-sensing electrodes, each of which includes at least two resistors; the pixel definition layer includes multiple pixel openings, with a gap between two adjacent pixel openings, and a pressure-sensing electrode is arranged in at least part of the gap.

[0007] In some embodiments of the present application, each resistor is located in each gap; or, at least two resistors are arranged in each gap.

[0008] In some embodiments of the present application, the resistor and the first electrode are spaced and insulated from each other;

[0009] In some embodiments of the present application, at least one resistor in the pressure sensing electrode is a zigzag structure.

[0010] In some embodiments of the present application, at least one resistor in the pressure sensing electrode is an interdigitated electrode.

[0011] In some embodiments of the present application, at least one resistor in the pressure sensing electrode is a sheet-like film.

[0012] In some embodiments of the present application, the pressure sensing electrode includes at least four resistors.

[0013] In some embodiments of the present application, the pressure sensing electrode includes four resistors, and the four resistors are connected in sequence to form a quadrilateral structure.

[0014] In some embodiments of the present application, the pressure sensing electrode includes a first input terminal, a second input terminal, a first output terminal, and a second output terminal; the resistor includes a first resistor, a second resistor, a third resistor, and a fourth resistor; wherein the first resistor is connected in series between the first input terminal and the first output terminal, the second resistor is connected in series between the first input terminal and the second output terminal, the third resistor is connected in series between the second input terminal and the first output terminal, and the fourth resistor is connected in series between the second input terminal and the second output terminal.

[0015] In some embodiments of the present application, each resistor is located in each gap, the first input terminal, the second input terminal, the first output terminal and the second output terminal are not arranged on the same layer as the resistor, the first resistor is connected to the first input terminal and the first output terminal through a via, the second resistor is connected to the first input terminal and the second output terminal through a via, the third resistor is connected to the second input terminal and the first output terminal through a via, and the fourth resistor is connected to the second input terminal and the second output terminal through a via.

[0016] In some embodiments of the present application, the substrate includes a driving circuit layer, and the first input terminal, the second input terminal, the first output terminal and the second output terminal are arranged in the driving circuit layer.

[0017] In some embodiments of the present application, the power line is connected in series between the first input terminal and the second input terminal; the signal collector is connected in series between the first output terminal and the second output terminal.

[0018] In some embodiments of the present application, the display panel includes a display area and a non-display area, the power line and the signal collector are arranged in the non-display area; the first resistor, the second resistor, the third resistor and the fourth resistor are arranged in the display area.

[0019] In some embodiments of the present application, the signal collector includes a transistor.

[0020] In some embodiments of the present application, the first input terminal and the second input terminal are respectively connected to the two ends of the power line, the signal collector is respectively connected to the first output terminal and the second output terminal through the two ends of the signal line, and the power line and the signal collector are arranged on the same layer as the pressure sensing electrode; or, the power line and the signal collector are not arranged on the same layer as the pressure sensing electrode, and the pressure sensing electrode is connected to the power line and the signal collector through a via.

[0021] In some embodiments of the present application, the pixel definition layer includes a plurality of pixel openings arranged in an array; the display panel includes a plurality of pressure-sensitive electrodes, and the orthographic projection of each pressure-sensitive electrode on the substrate does not overlap with the orthographic projection of the pixel opening on the substrate.

[0022] In some embodiments of the present application, a plurality of pressure sensing electrodes are arranged in an array.

[0023] In some embodiments of the present application, the pressure sensing electrode includes a strain gauge.

[0024] In some embodiments of the present application, the material of the strain gauge includes metal or semiconductor.

[0025] In some embodiments of the present application, the strain gauge material includes at least one of constantan, nickel-chromium alloy, kama alloy, even alloy, iron-chromium-aluminum alloy, platinum-tungsten alloy, and platinum-iridium alloy.

[0026] In some embodiments of the present application, the display panel also includes an integrated circuit for driving the light-emitting unit, and the pressure sensing electrode is electrically connected to the integrated circuit; or, the display panel also includes a pressure detection circuit, and the pressure sensing electrode is electrically connected to the pressure detection circuit.

[0027] An embodiment of a second aspect of the present application provides a display device, comprising the display panel in any one of the embodiments of the first aspect above.

[0028] The third aspect of the present application provides a method for manufacturing a display panel, comprising the following steps:

[0029] A first electrode and a pressure sensing electrode are formed on the same side of the substrate.

[0030] A pixel definition layer is formed on the side of the pressure-sensing electrode and the first electrode facing away from the substrate, the pixel definition layer includes a pixel defining portion and a pixel opening opened in the pixel defining portion, the orthographic projection of the pixel opening on the substrate and the orthographic projection of the first electrode on the substrate at least partially overlap, and the orthographic projection of the pixel defining portion on the substrate and the orthographic projection of the pressure-sensing electrode on the substrate at least partially overlap.

[0031] A light emitting unit is formed in the pixel opening.

[0032] In an embodiment of the present application, a functional layer is arranged on one side of a substrate, a pixel definition layer is arranged on a side of the functional layer away from the substrate, the functional layer includes a first electrode and a pressure-sensitive electrode, and the pressure-sensitive electrode is arranged in the same layer as the first electrode, which is beneficial to reducing the thickness of the display panel. The pixel definition layer includes a pixel defining portion and a pixel opening opened in the pixel defining portion, the pixel opening is used to accommodate a light-emitting unit, the pixel opening is a light-emitting area of ​​the display panel, and the pixel defining portion is a non-light-emitting area of ​​the display panel. The orthographic projection of the pixel opening on the substrate and the orthographic projection of the first electrode on the substrate at least partially overlap, the first electrode is used to drive the light-emitting unit located in the pixel opening to emit light, the orthographic projection of the pixel defining portion on the substrate and the orthographic projection of the pressure-sensitive electrode on the substrate at least partially overlap, that is, the pressure-sensitive electrode is at least partially located in the non-light-emitting area of ​​the display panel, thereby reducing the influence of the pressure-sensitive electrode on the light-emitting efficiency of the display panel and improving the performance of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Other features, objects and advantages of the present application will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals represent the same or similar features.

[0034] Figure 1 is a structural schematic diagram of a display panel provided in an embodiment of the present application;

[0035] Figure 2 is a schematic diagram of a top view structure of a display panel provided in an embodiment of the present application;

[0036] Figure 3 is a schematic diagram of a top view structure of another display panel provided in an embodiment of the present application;

[0037] Figure 4 is a schematic diagram of a pressure-sensing electrode structure of a display panel provided in an embodiment of the present application;

[0038] Figure 5 is a pressure sensing electrode circuit diagram of a display panel provided in an embodiment of the present application;

[0039] Figure 6 is a schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0040] Figure 7 is another pressure sensing electrode circuit diagram of a display panel provided in an embodiment of the present application;

[0041] Figure 8 is a structural schematic diagram of another display panel provided in an embodiment of the present application;

[0042] Fig. 9 This is a schematic diagram of circuit connections of an integrated circuit, a pressure sensing electrode, and a light-emitting unit provided in an embodiment of the present application;

[0043] Fig.10 This is a circuit connection diagram of a pressure sensing electrode and a pressure detection circuit provided in an embodiment of the present application;

[0044] Fig.11 It is a flow chart of a method for manufacturing a display panel provided in an embodiment of the present application.

[0045] Explanation of the reference numerals: 10, display area; 20, non-display area; 100, substrate; 110, driving circuit layer; 111, metal wire; 120, substrate; 200, functional layer; 210, first electrode; 220, pressure-sensing electrode; 221, resistor; 221a, first resistor; 221b, second resistor; 221c, third resistor; 221d, fourth resistor; 310a, first input terminal; 310b, second input terminal; 320a, first output terminal; 320b, second output terminal; 330, power line; 340, signal collector; 360, signal line; 400, pixel definition layer; 410, pixel defining portion; 420, pixel opening; 430, gap; 500, light-emitting unit; 600, second electrode; 700, integrated circuit; 800, pressure detection circuit. DETAILED DESCRIPTION

[0046] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating examples of the present application. In the accompanying drawings and the following description, at least some of the known structures and technologies are not shown to avoid unnecessary ambiguity in the present application; and, for clarity, the size of some structures may be exaggerated. In addition, the features, structures or characteristics described below may be combined in one or more embodiments in any suitable manner.

[0047] In the description of the present application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating directions or positional relationships, are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0048] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the embodiments of the present application. In the description of the present application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0049] like Figure 1 As shown, a display panel provided by an embodiment of the first aspect of the present application includes: a substrate 100, a functional layer 200 and a pixel definition layer 400. The functional layer 200 is arranged on one side of the substrate 100, and the functional layer 200 includes a first electrode 210 and a pressure-sensing electrode 220 arranged at intervals; the pixel definition layer 400 is arranged on the side of the functional layer 200 away from the substrate 100, and the pixel definition layer 400 includes a pixel defining portion 410 and a pixel opening 420 opened in the pixel defining portion 410, and the pixel opening 420 is used to accommodate the light-emitting unit 500, and the orthographic projection of the pixel opening 420 on the substrate 100 and the orthographic projection of the first electrode 210 on the substrate 100 at least partially overlap, and the orthographic projection of the pixel defining portion 410 on the substrate 100 and the orthographic projection of the pressure-sensing electrode 220 on the substrate 100 at least partially overlap.

[0050] In this embodiment, the functional layer 200 is disposed on one side of the substrate 100, and the pixel definition layer 400 is disposed on the side of the functional layer 200 away from the substrate 100. The functional layer 200 includes a first electrode 210 and a pressure-sensitive electrode 220. The pressure-sensitive electrode 220 is disposed in the same layer as the first electrode 210, which is conducive to reducing the thickness of the display panel and the difficulty of process preparation. The pixel definition layer 400 includes a pixel defining portion 410 and a pixel opening 420 opened in the pixel defining portion 410. The pixel opening 420 is used to accommodate the light-emitting unit 500. The pixel opening 420 is the light-emitting area of ​​the display panel, and the pixel defining portion 410 is the non-light-emitting area of ​​the display panel. The orthographic projection of the pixel opening 420 on the substrate 100 and the orthographic projection of the first electrode 210 on the substrate 100 at least partially overlap, and the first electrode 210 is used to drive the light-emitting unit 500 located in the pixel opening 420 to emit light. The orthographic projection of the pixel defining portion 410 on the substrate 100 and the orthographic projection of the pressure-sensing electrode 220 on the substrate 100 at least partially overlap, that is, the pressure-sensing electrode 220 is at least partially located in the non-luminous area of ​​the display panel, thereby reducing the influence of the pressure-sensing electrode 220 on the light output efficiency of the display panel and improving the performance of the display panel.

[0051] Optionally, a light emitting unit 500 is disposed in the pixel opening 420 , a second electrode 600 is disposed on the side of the pixel definition layer 400 facing away from the substrate 100 , and the first electrode 210 and the second electrode 600 are used to drive the light emitting unit 500 to emit light.

[0052] like Figure 2 and Figure 3 As shown, in some optional embodiments, the functional layer 200 includes a plurality of pressure sensing electrodes 220, each pressure sensing electrode 220 includes at least two resistors 221; the pixel definition layer 400 includes a plurality of pixel openings 420, and a gap 430 is provided between two adjacent pixel openings 420, and the pressure sensing electrode 220 is disposed in at least a portion of the gap 430.

[0053] In these optional embodiments, two adjacent pixel openings 420 are arranged at intervals to form a gap 430 between the two adjacent pixel openings 420. The pixel defining portion 410 is located in the gap 430. The pixel definition layer 400 includes a plurality of pixel openings 420, thus forming a plurality of gaps 430. The resistor 221 is located in the gap 430, which is beneficial for arranging more pixel openings 420 within the limited display area of ​​the display panel, thereby accommodating more light-emitting units 500, which is beneficial for enhancing the resolution of the display panel.

[0054] Optionally, each resistor 221 is located in each gap 430 ; or, at least two resistors 221 are disposed in each gap 430 .

[0055] Each resistor 221 is located in each gap 430, which means that the orthographic projection of the gap 430 on the substrate 100 corresponds to the orthographic projection of one resistor 221 on the substrate 100, that is, one resistor 221 is correspondingly arranged between two adjacent pixel openings 420. Each gap 430 is arranged correspondingly to at least two resistors 221, which means that the orthographic projection of each gap 430 on the substrate 100 corresponds to the orthographic projection of at least two resistors 221 on the substrate 100, that is, at least two resistors 221 are correspondingly arranged between two adjacent pixel openings 420.

[0056] The resistors 221 are located in the gaps 430, which is beneficial to reducing the size of the gaps 430, so that more pixel openings 420 can be arranged under the limited display area of ​​the display panel, thereby accommodating more light-emitting units 500, which is beneficial to enhancing the resolution of the display panel. Each gap 430 is arranged corresponding to at least two resistors 221, which is beneficial to increasing the arrangement density of the resistors 221, thereby enhancing the pressure sensing sensitivity of the display panel.

[0057] Optionally, the resistor 221 and the first electrode 210 are spaced apart and insulated from each other; since the resistor 221 and the first electrode 210 are arranged in the same layer, the first electrode 210 and the resistor 221 are spaced apart and insulated from each other to prevent the pressure-sensing electrode 220 from affecting the first electrode 210 driving the light-emitting unit 500 to emit light, and also to prevent the first electrode 210 from affecting the sensitivity of the pressure-sensing electrode 220.

[0058] Optional, such as Figure 2 and Figure 3 As shown, the pressure sensing electrode 220 includes at least four resistors 221 .

[0059] Optional, such as Figure 2 and Figure 3 As shown, four resistors 221 are connected in sequence to form a quadrilateral structure; the pressure sensing electrode 220 includes a quadrilateral structure formed by connecting four resistors 221, forming a quadrilateral bridge arm of a Wheatstone bridge.

[0060] Optional, such as Figure 4 As shown, at least one resistor 221 in the pressure sensing electrode 220 is a zigzag structure, and the resistor 221 is a connecting bridge of a Wheatstone bridge. The resistor 221 is set to a zigzag structure. While ensuring that the connecting bridge has a larger reference resistance 221 value, the size of the connecting bridge is reduced, so that the connecting bridge is distributed in a smaller area, thereby improving the influence of temperature differences on the output signal value. On the other hand, the area of ​​the connecting bridge can be increased, so that the connecting bridge can more accurately sense the strain of the display panel and improve the accuracy of the output signal value.

[0061] Optionally, at least one resistor 221 in the pressure sensing electrode 220 is a serpentine structure.

[0062] Optionally, at least one resistor 221 in the pressure sensing electrode 220 is an interdigitated electrode. An interdigitated electrode is an electrode with a periodic pattern in a plane such as a finger or a comb.

[0063] Optionally, at least one resistor 221 in the pressure sensing electrode 220 is a sheet-like film, thereby reducing the influence of the resistor 221 on the thickness of the display panel.

[0064] like Figure 5 As shown, in some optional embodiments, the pressure sensing electrode 220 includes a first input terminal 310a, a second input terminal 310b, a first output terminal 320a, and a second output terminal 320b; the resistor 221 includes a first resistor 221a, a second resistor 221b, a third resistor 221c and a fourth resistor 221d; wherein the first resistor 221a is connected in series between the first input terminal 310a and the first output terminal 320a, the second resistor 221b is connected in series between the first input terminal 310a and the second output terminal 320b, the third resistor 221c is connected in series between the second input terminal 310b and the first output terminal 320a, and the fourth resistor 221d is connected in series between the second input terminal 310b and the second output terminal 320b.

[0065] In these optional embodiments, among the four resistors 221 of the Wheatstone bridge, the first resistor 221a, the second resistor 221b, the third resistor 221c and the fourth resistor 221d are connected to form a quadrilateral, the first resistor 221a is connected in series between the first input terminal 310a and the first output terminal 320a, the second resistor 221b is connected in series between the first input terminal 310a and the second output terminal 320b, the third resistor 221c is connected in series between the second input terminal 310b and the first output terminal 320a, and the fourth resistor 221d is connected in series between the second input terminal 310b and the second output terminal 320b. The four resistors 221 are called the four bridge arms of the Wheatstone bridge. The first output terminal 320a and the second output terminal 320b signal collector 340 are called "bridges". The first input terminal 310a and the second input terminal 310b are connected to the power line 330. When the power line 330 is connected, current flows through each branch in the bridge circuit. When the bridge is balanced, the potential between the first output terminal 320a and the second output terminal 320b is equal, and the current flowing through the signal collector 340 in the bridge circuit is 0. At this time, the Wheatstone bridge is said to be in a balanced state. The potential between the first output terminal 320a and the second output terminal 320b is not equal. At this time, the current flowing through the signal collector 340 in the bridge circuit is not 0, and the signal collector 340 outputs a corresponding signal value.

[0066] The current passing through the first resistor 221a is I1, the current passing through the second resistor 221b is I2, and the current passing through the third resistor 221c is I S , the current passing through the fourth resistor 221d is I X , when the bridge is balanced, I1R1=I2R2, I S R S =I X R X , and because: I1=I S , I2=I X , so R X =R S R1 / R2=MR S The circuit where R1 and R2 are located is called the ratio arm, M = R1 / R2 is called the ratio arm multiplier, R1 is called the comparison arm, R X It is called the measuring arm. When the bridge is balanced, just read M and R S The value of R X value.

[0067] When the Wheatstone bridge pressure sensor is disposed on the display panel, when pressure is applied to the display panel, the display panel is deformed, and the first resistor 221a, the second resistor 221b, the third resistor 221c and the fourth resistor 221d disposed on the display panel are deformed, resulting in corresponding changes in their resistance values, thereby causing the bridge to lose balance.

[0068] like Figure 6 As shown, in some optional embodiments, each resistor 221 is located in each gap 430, the first input terminal 310a, the second input terminal 310b, the first output terminal 320a and the second output terminal 320b are not arranged on the same layer as the resistor 221, the first resistor 221a connects the first input terminal 310a and the first output terminal 320a through a via, the second resistor 221b connects the first input terminal 310a and the second output terminal 320b through a via, the third resistor 221c connects the second input terminal 310b and the first output terminal 320a through a via, and the fourth resistor 221d connects the second input terminal 310b and the second output terminal 320b through a via.

[0069] In these optional embodiments, when each gap 430 is set corresponding to each resistor 221, the resistor 221 is set on the same layer as the first electrode 210, and the first input terminal 310a, the second input terminal 310b, the first output terminal 320a and the second output terminal 320b are not set on the same layer as the resistor 221 and the first electrode 210, thereby reducing the wiring in the functional layer 200, making the wiring design easier, and further reducing the size of the gap 430, which is beneficial to improving the resolution of the display panel.

[0070] Optionally, the substrate 100 includes a substrate 120 and a driving circuit layer 110, wherein the driving circuit layer 110 includes a metal wire 111, and the first input terminal 310a, the second input terminal 310b, the first output terminal 320a and the second output terminal 320b are arranged on the driving circuit layer 110 of the substrate 100, the first resistor 221a connects the first input terminal 310a and the first output terminal 320a through a hole, the second resistor 221b connects the first input terminal 310a and the second output terminal 320b through a hole, the third resistor 221c connects the second input terminal 310b and the first output terminal 320a through a hole, and the fourth resistor 221d connects the second input terminal 310b and the second output terminal 320b through a hole. The substrate 120 and the driving circuit layer 110 are stacked, and the first input terminal 310a, the second input terminal 310b, the first output terminal 320a, and the second output terminal 320b are arranged on the driving circuit layer 110, so that the wiring design is easier, and the size of the gap 430 can be further reduced, which is conducive to improving the resolution of the display panel. In addition, the first input terminal 310a, the second input terminal 310b, the first output terminal 320a, and the second output terminal 320b can also be formed by one-time patterning etching with the metal wire 111, saving manufacturing costs.

[0071] Optionally, the driving circuit layer 110 may include a driving transistor and source-drain electrodes, and the first input terminal 310a, the second input terminal 310b, the first output terminal 320a and the second output terminal 320b may be arranged in the same layer as the source-drain electrodes or between the film layer where the source-drain electrodes are located and the functional layer 200.

[0072] like Figure 5 As shown, in some optional embodiments, the display panel also includes: a power line 330 and a signal collector 340, the power line 330 is connected in series between the first input terminal 310a and the second input terminal 310b, and the signal collector 340 is connected in series between the first output terminal 320a and the second output terminal 320b.

[0073] In these optional embodiments, when the power line 330 is connected, current flows through each resistor 221. The signal collector 340 is used to export the detected current data to the integrated circuit 700 or the pressure detection circuit 800. Optionally, the signal collector 340 includes a transistor.

[0074] like Figure 7 As shown, in some optional embodiments, the display panel includes a display area 10 and a non-display area 20, the power line 330 and the signal collector 340 are arranged in the non-display area 20; the first resistor 221a, the second resistor 221b, the third resistor 221c and the fourth resistor 221d are arranged in the display area 10.

[0075] In these optional embodiments, the first resistor 221a, the second resistor 221b, the third resistor 221c and the fourth resistor 221d are arranged in the display area 10, so that the display area 10 of the display panel has a pressure sensing function, and the power line 330 and the signal collector 340 are arranged in the non-display area 20, thereby reducing the power line 330 and the signal collector 340 occupying the display area 10, which is beneficial to increase the resolution of the display panel.

[0076] like Figure 7 As shown, in some optional embodiments, the first input terminal 310a and the second input terminal 310b are respectively connected to the two ends of the power line 330, and the signal collector 340 is respectively connected to the first output terminal 320a and the second output terminal 320b through the two ends of the signal line 360, and the power line 330, the signal collector 340 and the pressure sensing electrode 220 are arranged on the same layer; or, the power line 330, the signal collector 340 and the pressure sensing electrode 220 are not arranged on the same layer, and the pressure sensing electrode 220 is connected to the power line 330 and the signal line 360 ​​through a via.

[0077] The signal collector 340 performs touch detection on the display panel. The power line 330, the signal collector 340 and the pressure sensing electrode 220 are arranged in the same layer, that is, the power line 330, the signal collector 340 are arranged in the functional layer 200, or, because the power line 330, the signal line 360 ​​of the signal collector 340 are arranged in a long path, the power line 330, the signal collector 340 and the pressure sensing electrode 220 are not arranged in the same layer, and the pressure sensing electrode 220 is connected to the power line 330 and the signal line 360 ​​through a via.

[0078] Optional, such as Figure 8 As shown, the power line 330 , the signal collector 340 and the signal line 360 ​​are not arranged in the same layer as the pressure sensing electrode 220 , and the power line 330 , the signal collector 340 and the signal line 360 ​​are arranged in the driving circuit layer 110 .

[0079] Optionally, the power line 330 , the signal collector 340 and the signal line 360 ​​are arranged in the driving circuit layer 110 , and are arranged in the same layer as the source and drain electrodes or are arranged between the film layer where the source and drain electrodes are located and the functional layer 200 .

[0080] like Figure 2 and Figure 3 As shown, in some optional embodiments, the pixel definition layer 400 includes a plurality of pixel openings 420, and the pixel openings 420 are arranged in an array; the display panel includes a plurality of pressure sensing electrodes 220, and the orthographic projection of each pressure sensing electrode 220 on the substrate 100 does not overlap with the orthographic projection of the pixel opening 420 on the substrate 100.

[0081] In these optional embodiments, the pixel openings 420 are arranged in an array, and the display panel includes a plurality of pressure sensing electrodes 220. The orthographic projection of each pressure sensing electrode 220 on the substrate 100 is staggered with the orthographic projection of the pixel opening 420 on the substrate 100, that is, the orthographic projection of the pressure sensing electrode 220 on the substrate 100 and the orthographic projection of the pixel opening 420 on the substrate 100 do not overlap each other, thereby preventing the pressure sensing electrode 220 from affecting the light extraction efficiency of the display panel.

[0082] Optionally, the plurality of pressure sensing electrodes 220 are arranged in an array, which is beneficial to enhancing the uniformity of the distribution of the pressure sensing electrodes 220 on the display panel and enhancing the accuracy of the pressure sensing function of the display panel.

[0083] In some optional embodiments, the pressure sensing electrode 220 includes a strain gauge; the strain gauge is composed of a sensitive grid and the like, and is an element for measuring strain. Optionally, the material of the strain gauge includes metal or semiconductor, that is, when the metal or semiconductor material is mechanically deformed under the action of an external force, the value of its resistance 221 changes accordingly. The strain gauge can be a metal resistance strain gauge or a semiconductor strain gauge.

[0084] Optionally, the strain gauge material includes at least one of constantan, nickel-chromium alloy, kama alloy, ivine alloy, iron-chromium-aluminum alloy, platinum-tungsten alloy, and platinum-iridium alloy. The above materials have good oxidation resistance, dimensional stability, and adaptability to temperature changes, which are conducive to improving the stress-strain measurement accuracy.

[0085] like Fig. 9 and Fig.10As shown, in some optional embodiments, the display panel also includes an integrated circuit 700 for driving the light-emitting unit 500, and the pressure sensing electrode 220 is electrically connected to the integrated circuit 700; or, the display panel also includes a pressure detection circuit 800, and the pressure sensing electrode 220 is electrically connected to the pressure detection circuit 800.

[0086] In these optional embodiments, the integrated circuit 700 is used to drive the light-emitting unit 500 of the display panel, and the pressure sensing electrode 220 is electrically connected to the integrated circuit 700, or the pressure sensing electrode 220 is electrically connected to the pressure detection circuit 800. That is, the pressure sensing electrode 220 can be integrated with the integrated circuit 700 of the display panel, and the pressure detection circuit 800 can also be independently provided, and the pressure sensing electrode 220 is connected to the pressure detection circuit 800.

[0087] The second aspect of the present application provides a display device, including the display panel in any of the first aspect embodiments. Since the display device provided by the second aspect of the present application includes the display panel in any of the first aspect embodiments, the display device provided by the second aspect of the present application has the beneficial effects of the display panel in any of the first aspect embodiments, which will not be described in detail here.

[0088] The display device in the embodiments of the present application includes but is not limited to mobile phones, personal digital assistants (PDAs), tablet computers, e-books, televisions, access control systems, smart landline phones, consoles, and other devices with display functions.

[0089] The third embodiment of the present application provides a method for manufacturing a display panel, such as Fig.11 As shown, the following steps are included:

[0090] Step S01 : forming a first electrode 210 and a pressure sensing electrode 220 on the same side of a substrate 100 .

[0091] Step S02: forming a pixel definition layer 400 on the side of the pressure-sensing electrode 220 and the first electrode 210 facing away from the substrate 100, wherein the pixel definition layer 400 includes a pixel defining portion 410 and a pixel opening 420 opened in the pixel defining portion 410, wherein the orthographic projection of the pixel opening 420 on the substrate 100 and the orthographic projection of the first electrode 210 on the substrate 100 at least partially overlap, and the orthographic projection of the pixel defining portion 410 on the substrate 100 and the orthographic projection of the pressure-sensing electrode 220 on the substrate 100 at least partially overlap;

[0092] Step S03 : forming a light emitting unit 500 in the pixel opening 420 .

[0093] In this embodiment, the pressure sensing electrode 220 is disposed in the same layer as the first electrode 210, and the light emitting unit 500 is formed in the pixel opening 420. The first electrode 210 is used to drive the light emitting unit 500 to emit light. The pressure sensing electrode 220 is disposed in the same layer as the first electrode 210, which is conducive to reducing the overall thickness of the display panel. The pixel definition layer 400 includes a pixel defining portion 410 and a pixel opening 420 opened in the pixel defining portion 410. The pixel opening 420 is used to accommodate the light emitting unit 500. The pixel opening 420 is the light emitting area of ​​the display panel, and the pixel defining portion 410 is the non-light emitting area of ​​the display panel. The orthographic projection of the pixel opening 420 on the substrate 100 and the orthographic projection of the first electrode 210 on the substrate 100 at least partially overlap, and the first electrode 210 is used to drive the light-emitting unit 500 located in the pixel opening 420 to emit light. The orthographic projection of the pixel defining portion 410 on the substrate 100 and the orthographic projection of the pressure-sensing electrode 220 on the substrate 100 at least partially overlap, that is, the pressure-sensing electrode 220 is at least partially located in the non-luminous area of ​​the display panel, thereby reducing the influence of the pressure-sensing electrode 220 on the light output efficiency of the display panel and improving the performance of the display panel.

[0094] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A display panel, characterized in that: include: substrate; A functional layer is arranged on one side of the substrate, and the functional layer includes a first electrode and a pressure sensing electrode arranged at intervals; A pixel definition layer is arranged on the side of the functional layer away from the substrate, the pixel definition layer includes a pixel defining portion and a pixel opening opened in the pixel defining portion, the pixel opening is used to accommodate the light-emitting unit, the pixel opening is at least partially overlapped in the orthographic projection of the substrate and the orthographic projection of the first electrode on the substrate, and the orthographic projection of the pixel defining portion on the substrate and the orthographic projection of the pressure-sensing electrode on the substrate are at least partially overlapped.

2. The display panel according to claim 1, characterized in that: The functional layer includes a plurality of pressure-sensing electrodes, each of which includes at least two resistors; the pixel definition layer includes a plurality of pixel openings, a gap is provided between two adjacent pixel openings, and the pressure-sensing electrodes are provided in at least part of the gaps; Preferably, each of the resistors is located in each of the gaps; or, at least two of the resistors are arranged in each of the gaps; Preferably, the resistor and the first electrode are spaced and insulated from each other; Preferably, at least one resistor in the pressure sensing electrode is a zigzag structure; Preferably, at least one of the resistors in the pressure sensing electrodes is an interdigitated electrode; Preferably, at least one resistor in the pressure sensing electrodes is a sheet-like film.

3. The display panel according to claim 2, characterized in that: The pressure sensing electrode includes at least four resistors; Preferably, the pressure sensing electrode includes four resistors, and the four resistors are connected in sequence to form a quadrilateral structure.

4. The display panel according to claim 3, characterized in that: The pressure sensing electrode comprises a first input end, a second input end, a first output end, and a second output end; The resistors include a first resistor, a second resistor, a third resistor and a fourth resistor; Wherein, the first resistor is connected in series between the first input terminal and the first output terminal, the second resistor is connected in series between the first input terminal and the second output terminal, the third resistor is connected in series between the second input terminal and the first output terminal, and the fourth resistor is connected in series between the second input terminal and the second output terminal; Preferably, each of the resistors is located in each of the gaps, the first input end, the second input end, the first output end and the second output end are not arranged on the same layer as the resistor, the first resistor is connected to the first input end and the first output end through a via hole, the second resistor is connected to the first input end and the second output end through a via hole, the third resistor is connected to the second input end and the first output end through a via hole, and the fourth resistor is connected to the second input end and the second output end through a via hole; Preferably, the substrate comprises a driving circuit layer, and the first input end, the second input end, the first output end and the second output end are arranged on the driving circuit layer.

5. The display panel according to claim 4, characterized in that: Also includes: A power line connected in series between the first input terminal and the second input terminal; A signal collector, connected in series between the first output terminal and the second output terminal; Preferably, the display panel includes a display area and a non-display area, the power line and the signal collector are arranged in the non-display area; the first resistor, the second resistor, the third resistor and the fourth resistor are arranged in the display area; Preferably, the signal collector comprises a transistor; Preferably, the first input terminal and the second input terminal are respectively connected to the two ends of the power line, the signal collector is respectively connected to the first output terminal and the second output terminal through the two ends of the signal line, and the power line and the signal collector are arranged on the same layer as the pressure sensing electrode; or, the power line and the signal collector are not arranged on the same layer as the pressure sensing electrode, and the pressure sensing electrode is connected to the power line and the signal collector through a via.

6. The display panel according to claim 1, characterized in that: The pixel definition layer includes a plurality of pixel openings, and the pixel openings are arranged in an array; The display panel comprises a plurality of pressure sensing electrodes, and the orthographic projection of each of the pressure sensing electrodes on the substrate does not overlap with the orthographic projection of the pixel opening on the substrate; Preferably, the plurality of pressure sensing electrodes are arranged in an array.

7. The display panel according to claim 1, characterized in that: The pressure sensing electrode includes a strain gauge; Preferably, the material of the strain gauge includes metal or semiconductor; Preferably, the strain gauge material includes at least one of constantan, nickel-chromium alloy, kama alloy, ivine alloy, iron-chromium-aluminum alloy, platinum-tungsten alloy and platinum-iridium alloy.

8. The display panel according to claim 1, characterized in that: The display panel further includes an integrated circuit for driving the light-emitting unit, and the pressure-sensing electrode is electrically connected to the integrated circuit; or, the display panel further includes a pressure detection circuit, and the pressure-sensing electrode is electrically connected to the pressure detection circuit.

9. A display device, characterized in that: A display panel comprising any one of claims 1-8.

10. A method for manufacturing a display panel, characterized in that: forming a first electrode and a pressure sensing electrode on the same side of the substrate; A pixel definition layer is formed on the side of the pressure-sensing electrode and the first electrode facing away from the substrate, the pixel definition layer comprising a pixel defining portion and a pixel opening opened in the pixel defining portion, the orthographic projection of the pixel opening on the substrate and the orthographic projection of the first electrode on the substrate at least partially overlap, and the orthographic projection of the pixel defining portion on the substrate and the orthographic projection of the pressure-sensing electrode on the substrate at least partially overlap; A light emitting unit is formed in the pixel opening.

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