Display panel and display device

Abstract

The invention relates to a display panel and a display device, and the display panel comprises an array substrate which is provided with a power signal line and a reset signal line; the light-emitting device layer is located on the array substrate, the light-emitting device layer comprises a plurality of light-emitting units, each light-emitting unit comprises a first electrode, an organic material layer and a second electrode, the first electrode is electrically connected with the reset signal line, the second electrode is electrically connected with the power signal line, and at least part of the light-emitting units are switched between a first state and a second state; in the first state, the power supply signal line provides a power supply signal for the connected light emitting unit; in the second state, the reset signal lines provide reset signals for the connected light-emitting units, the power supply signal lines provide sensing driving signals for the connected light-emitting units, the light-emitting units are multiplexed as pressure sensors, and the reset signal lines are configured to transmit sensing induction signals output from the pressure sensors. The embodiment of the invention provides a display device, and aims to improve the use performance of the display device.

Description

Technical Field

[0001] The present invention relates to the field of display panel technology and in particular to a display panel and a display device. 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 OLED display devices needs to be improved. Summary of the invention

[0004] The embodiments of the present application provide a display device, aiming to improve the performance of the display device.

[0005] On the one hand, according to an embodiment of the present application, a display panel is proposed, comprising: an array substrate, provided with a power signal line and a reset signal line; a light-emitting device layer, located on the array substrate, the light-emitting device layer comprising a plurality of light-emitting units, the light-emitting unit comprising a first electrode, an organic material layer and a second electrode, the first electrode being arranged on a side of the organic material layer facing the array substrate, the first electrode being electrically connected to the reset signal line, and the second electrode being electrically connected to the power signal line; wherein at least some of the light-emitting units are switched between a first state and a second state; in the first state, the power signal line provides a power signal to the connected light-emitting unit, and the light-emitting unit is used for display; in the second state, the reset signal line provides a reset signal to the connected light-emitting unit, the power signal line provides a sensing drive signal to the connected light-emitting unit, the light-emitting unit is multiplexed as a pressure sensor, and the reset signal line is configured to transmit a sensing induction signal output from the pressure sensor.

[0006] According to one aspect of the embodiment of the present application, the power signal includes a constant voltage.

[0007] According to one aspect of the embodiment of the present application, the sensing driving signal includes a pulse signal.

[0008] According to one aspect of the embodiments of the present application, the sensing signal includes capacitance information.

[0009] According to one aspect of an embodiment of the present application, the display panel further includes an isolation structure, which is located on the array substrate. The isolation structure encloses a plurality of isolation openings, and each light-emitting unit is disposed corresponding to one of the isolation openings.

[0010] According to one aspect of an embodiment of the present application, the isolation structure includes a first part and a second part which are arranged in sequence along a direction away from the array substrate, the orthographic projection of the first part on the array substrate is located within the orthographic projection of the second part on the array substrate, and the organic material layers of two adjacent light-emitting units are disconnected at the isolation structure.

[0011] According to one aspect of an embodiment of the present application, the display panel also includes a pixel definition layer, the isolation structure is arranged on the side of the pixel definition layer facing away from the array substrate, the pixel definition layer includes a pixel defining portion and a pixel opening formed by the pixel defining portion, and the light-emitting unit is at least partially located in the pixel opening.

[0012] According to one aspect of the embodiment of the present application, each isolation opening is interconnected with one of the pixel openings.

[0013] According to one aspect of the embodiment of the present application, the opening area of ​​the isolation opening is larger than the opening area of ​​the pixel opening.

[0014] According to one aspect of the embodiments of the present application, the isolation structure is in a mesh shape as a whole.

[0015] According to one aspect of an embodiment of the present application, the display panel includes an electrode extension portion and an auxiliary electrode, the orthographic projection of the auxiliary electrode on the array substrate covers at least a portion of the electrode extension portion, the electrode extension portion and the auxiliary electrode are insulated, the electrode extension portion is electrically connected to the first electrode of the light-emitting unit, and the auxiliary electrode is electrically connected to the second electrode of the light-emitting unit.

[0016] According to one aspect of the embodiment of the present application, the electrode extension portion is arranged in the same layer as the first electrode.

[0017] According to one aspect of the embodiments of the present application, the electrode extension portion extends from the first electrode, or the array substrate further includes a connecting line, the electrode extension portion is connected to the first electrode via the connecting line, and the connecting line and the electrode extension portion are arranged in different layers.

[0018] According to one aspect of the embodiment of the present application, the second electrode is in contact with and electrically connected to the auxiliary electrode.

[0019] According to one aspect of the embodiments of the present application, at least a portion of the isolation structure is a conductive material body and forms an auxiliary electrode.

[0020] According to one aspect of an embodiment of the present application, on the array substrate, the orthographic projection of the electrode extension portion partially overlaps with the orthographic projection of the second electrode and / or the auxiliary electrode to form an auxiliary capacitor.

[0021] According to one aspect of an embodiment of the present application, the display panel has a first area and a second area, the second electrodes of the light-emitting units in the first area are connected to each other, and the light-emitting units in the second area switch between a first state and a second state.

[0022] According to one aspect of the embodiments of the present application, the light emitting units located in the second area are distributed in an array, and each row of light emitting units is electrically connected to the same reset signal line.

[0023] According to one aspect of the embodiments of the present application, each second electrode of each light-emitting unit located in the second area is electrically connected to the same power signal line; or, each second electrode of each light-emitting unit located in the second area is respectively connected to a power signal line.

[0024] According to one aspect of the embodiments of the present application, the second electrodes of the light-emitting units in the second region are insulated from each other.

[0025] On the other hand, according to an embodiment of the present application, a display device is provided, including the above-mentioned display panel.

[0026] According to another aspect of the embodiment of the present application, the display device further includes:

[0027] A touch panel is arranged on a side of the light emitting device layer away from the array substrate, the touch panel comprises a plurality of touch electrodes, and the touch electrodes are configured to feedback coordinate information of the display panel at a touch position;

[0028] The processor is configured to obtain coordinate information, determine the light-emitting unit to be multiplexed as a pressure sensor according to the coordinate information; control the light-emitting unit multiplexed as the pressure sensor to switch from a first state to a second state and obtain a sensing signal of a touch position; and identify a touch mode of the touch position according to the sensing signal.

[0029] According to another aspect of the embodiment of the present application, the touch electrodes and the light-emitting units are arranged in a staggered manner in terms of their orthographic projections on the array substrate.

[0030] According to another aspect of the embodiment of the present application, the touch mode includes a pressing mode and a release mode, the sensing signal includes capacitance information, and the processor is configured to: when the capacitance value fed back by the capacitance information is greater than a first threshold, determine that the touch mode is a pressing mode; when the capacitance value fed back by the capacitance information is equal to the first threshold, determine that the touch mode is a release mode.

[0031] According to another aspect of the embodiment of the present application, the press mode includes a double-click mode and a long press mode, and the processor is configured as follows: when the light-emitting unit multiplexed as a pressure sensor is in the second state, and the capacitance value of the capacitance information feedback at least twice is greater than the first threshold value, the press mode is determined to be the double-click mode; when the light-emitting unit multiplexed as a pressure sensor is in the second state, and the capacitance value of the capacitance information feedback is continuously the first threshold value within a predetermined time period, the press mode is determined to be the long press mode.

[0032] According to another aspect of the embodiment of the present application, the processor is also configured to: when the light-emitting unit to be multiplexed as a pressure sensor is not touched, control the reset signal line to provide a reset signal to the connected light-emitting unit; control the power signal line to provide a sensing drive signal to the connected light-emitting unit, and control the reset signal line to sense the capacitance information of the light-emitting unit to be multiplexed as a pressure sensor; and determine the capacitance value fed back by the capacitance information as the first threshold.

[0033] According to another aspect of an embodiment of the present application, an array substrate includes a stacked substrate and a driving circuit layer, a power signal line and a reset signal line are at least partially arranged in the driving circuit layer, the driving circuit layer includes a plurality of pixel circuits and a light emitting control line, each pixel circuit is electrically connected to at least one light emitting unit, a reset transistor of the pixel circuit is connected between the reset signal line and the first electrode, and a light emitting control transistor of the pixel circuit is connected between the driving transistor of the pixel circuit and the first electrode, and the processor is further configured as follows:

[0034] When the light control signal on the light control line controls the light control transistor of the pixel circuit to turn off so that the light unit stops emitting light, the processor controls the light unit multiplexed as a pressure sensor to switch from the first state to the second state and obtains the sensing signal of the touch position.

[0035] According to the display panel and display device provided by the embodiment of the present application, the display panel includes an array substrate and a light-emitting device layer, a power signal line and a reset signal line are arranged on the array substrate, the light-emitting device layer includes a plurality of light-emitting units, the first electrode of the light-emitting unit is electrically connected to the reset signal line, the second electrode is electrically connected to the power signal line, and at least some of the light-emitting units can be switched between a first state and a second state, in the first state, the power signal line provides a power signal to the connected light-emitting unit, the light-emitting unit is used for display, and the display requirements of the display panel are ensured. In the second state, the reset signal line provides a reset signal to the connected light-emitting unit, the power signal line provides a sensing drive signal to the connected light-emitting unit, the light-emitting unit is multiplexed as a pressure sensor, the reset signal line is configured to sense the sensing signal of the pressure sensor, and whether there is a touch action at the location can be confirmed according to the sensing signal, which can ensure that the display panel is integrated with a touch position detection function, and at the same time, the light-emitting unit can be reused to reduce the cost of the display panel and optimize the performance of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0037] Figure 1 is a top view of a display panel according to an embodiment of the present application;

[0038] Figure 2 yes Figure 1 A cross-sectional view along the AA direction;

[0039] Figure 3 is a schematic cross-sectional view of a partial structure of a display panel according to an embodiment of the present application;

[0040] Figure 4 is a pixel circuit diagram of a display panel according to an embodiment of the present application;

[0041] Figure 5 is a schematic structural diagram of a display panel according to another embodiment of the present application;

[0042] Figure 6 is a top view of a display panel according to another embodiment of the present application;

[0043] Figure 7 is a schematic cross-sectional structural diagram of a display device according to another embodiment of the present application;

[0044] Figure 8 This is a schematic diagram of a 3D touch control principle of a display device according to an embodiment of the present application;

[0045] Fig. 9 This is a control timing principle diagram of a display device according to an embodiment of the present application.

[0046] in:

[0047] 100-display panel;

[0048] 10-array substrate; VSS-power signal line; Vref-reset signal line; EM-light emitting control line; 11-substrate; 12-driving circuit layer; 121-pixel circuit;

[0049] 20-isolation structure; 21-first part; 22-second part; 30-light-emitting device layer; 30a-light-emitting unit; 31-first electrode; 32-organic material layer; 33-second electrode; 34-electrode extension; 35-auxiliary electrode; 301-first area; 302-second area;

[0050] 40-encapsulation layer; 41-first encapsulation layer; 42-second encapsulation layer;

[0051] 50-pixel definition layer;

[0052] 200 - touch panel; 210 - touch electrode.

[0053] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0054] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, 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 the examples of the present application.

[0055] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0056] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0057] In the embodiments of the present application, the term “electrically connected” may refer to a direct electrical connection between two components, or may refer to an electrical connection between two components via one or more other components.

[0058] It is obvious to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit or scope of the present application. Therefore, the present application is intended to cover modifications and changes of the present application that fall within the scope of the corresponding claims (technical solutions for protection) and their equivalents. It should be noted that the implementation methods provided in the embodiments of the present application can be combined with each other without contradiction.

[0059] like Figures 1 to 4 As shown, Figure 1 is a top view of a display panel according to an embodiment of the present application, Figure 2 yes Figure 1 The cross-sectional diagram along the AA direction is shown in Fig. Figure 3is a schematic structural diagram of an array substrate according to an embodiment of the present application. Figure 4 This is a pixel circuit diagram of a display panel according to an embodiment of the present application.

[0060] The display panel 100 provided in the embodiment of the present application includes an array substrate 10 and a light-emitting device layer 30. The array substrate 10 is provided with a power signal line VSS and a reset signal line Vref. The light-emitting device layer 30 is located on the array substrate 10. The light-emitting device layer 30 includes a plurality of light-emitting units 30a. The light-emitting units 30a include a first electrode 31, an organic material layer 32, and a second electrode 33. The first electrode 31 is disposed on a side of the organic material layer 32 facing the array substrate 10. The first electrode 31 is electrically connected to the reset signal line Vref, and the second electrode 33 is electrically connected to the power signal line VSS. At least some of the light-emitting units 30a can be switched between a first state and a second state.

[0061] In the first state, the power signal line VSS provides a power signal to the connected light emitting unit 30a, and the light emitting unit 30a is used for display. In the second state, the reset signal line Vref provides a reset signal to the connected light emitting unit 30a, and the power signal line VSS provides a sensing drive signal to the connected light emitting unit 30a, and the light emitting unit 30a is multiplexed as a pressure sensor, and the reset signal line Vref is configured to transmit a sensing induction signal output from the pressure sensor.

[0062] The array substrate 10 may include a substrate 11, and the substrate 11 may be a hard substrate, such as a glass substrate, or a flexible substrate, and its material may be polyimide, polystyrene, polyethylene terephthalate, polyparaxylene, polyethersulfone or polyethylene naphthalate.

[0063] The array substrate 10 may further include a driving circuit layer 12, and the driving circuit layer 12 may include a plurality of pixel circuits 121. For example, the driving circuit layer 12 may include a first conductive layer, a second conductive layer, and a third conductive layer that are disposed on one side of the substrate 11 and are stacked. An insulating layer is disposed between adjacent conductive layers. Exemplarily, the driving circuit disposed in the array layer includes a transistor and a storage capacitor. The transistor includes a semiconductor, a gate, a source, and a drain. The storage capacitor includes a first electrode and a second electrode. As an example, the gate and the first electrode may be located in the first conductive layer, the second electrode may be located in the second conductive layer, the source and the drain may be located in the third conductive layer, and the reset signal line Vref may be disposed in the array layer of the array substrate 10, and may optionally be disposed in the same layer as the source and the drain of the transistor. At least part of the power signal line VSS may be disposed in the driving circuit layer 12 of the array substrate 10. Of course, in some embodiments, the power signal line VSS may also be partially disposed in the structural layer above the driving circuit layer 12 of the array substrate 10 to ensure the connection requirements with the second electrode 33.

[0064] It should be noted that the transistors mentioned in the embodiments of the present application can be N-type transistors or P-type transistors. For N-type transistors, the on-level is a high level and the off-level is a low level. That is, when the gate of the N-type transistor is at a high level, the first and second poles thereof are connected, and when the gate of the N-type transistor is at a low level, the first and second poles thereof are disconnected. For P-type transistors, the on-level is a low level and the off-level is a high level. That is, when the control pole of the P-type transistor is at a low level, the first and second poles thereof are connected, and when the control terminal of the P-type transistor is at a high level, the first and second poles thereof are disconnected. In a specific implementation, the gate of each of the above-mentioned transistors is used as its control pole, and, according to the signal of the gate of each transistor and its type, the first pole thereof can be used as the source and the second pole as the drain, or the first pole thereof can be used as the drain and the second pole as the source, and no distinction is made here. In addition, the on-level and the off-level in the embodiments of the present application are both general terms, and the on-level refers to any level that can turn on the transistor, and the off-level refers to any level that can turn off / turn off the transistor.

[0065] The organic material layer 32 of the light emitting unit 30a may include a stacked hole injection layer (HIL), a hole transport layer (HTL), a light emitting device layer 30, an electron injection layer (EIL) and an electron transport layer (ETL).

[0066] The first electrode 31 is a material with a high work function to improve the hole injection efficiency, and can be gold (Au), platinum (Pt), titanium (Ti), silver (Ag), indium tin oxide (ITO), zinc tin oxide (IZO) or a transparent conductive polymer (such as polyaniline), etc. For example, the first electrode 31 can be made of an ITO-Ag-ITO composite material, without special limitation.

[0067] The material of the second electrode 33 can be one of the metal materials such as silver (Ag), aluminum (Al), lithium (Li), magnesium (Mg), ytterbium (Yb), calcium (Ca) or indium (In), and can also be an alloy of the aforementioned metal materials, such as magnesium-silver alloy (Mg / Ag) and lithium-aluminum alloy (Li / Al), which is not limited in this embodiment.

[0068] Optionally, among the multiple light-emitting units 30a included in the light-emitting device layer 30, each light-emitting unit 30a has a first state, that is, each light-emitting unit 30a is used for display, and some light-emitting units 30a can have a second state and can switch between the first state and the second state. Of course, all light-emitting units 30a can also have a second state. In the second state, the light-emitting unit 30a is multiplexed as a pressure sensor, and the pressure sensor is configured to feedback the capacitance information of the display panel 100 at the touch position. The capacitance information can be obtained through the reset signal line Vref.

[0069] The display panel 100 provided in the embodiment of the present application includes an array substrate 10 and a light-emitting device layer 30. A power signal line VSS and a reset signal line Vref are provided on the array substrate 10. The light-emitting device layer 30 includes a plurality of light-emitting units 30a. The first electrode 31 of the light-emitting unit 30a is electrically connected to the reset signal line Vref, and the second electrode 33 is electrically connected to the power signal line VSS. At least part of the light-emitting units 30a can be switched between a first state and a second state. In the first state, the power signal line VSS provides a power signal to the connected light-emitting unit 30a. The light-emitting unit 30a is used for display to ensure the display requirements of the display device. In the second state, the reset signal line Vref provides a reset signal to the connected light-emitting unit 30a, and the power signal line VSS provides a sensing drive signal to the connected light-emitting unit 30a. The light-emitting unit 30a is multiplexed as a pressure sensor. The reset signal line Vref is configured to transmit a sensing signal output from the pressure sensor. It can be confirmed whether there is a touch action at the location based on the sensing signal, which can ensure that the display device is integrated with a touch position detection function. At the same time, the light-emitting unit 30a can be reused to reduce the cost of the display panel 100 and optimize the performance of the display panel 100.

[0070] Continue reading Figures 1 to 4 As shown, in some optional embodiments, the display panel 100 further includes an isolation structure 20, which may be located on the array substrate 10, and the isolation structure 20 encloses a plurality of isolation openings, and each light-emitting unit 30a is disposed corresponding to one of the isolation openings.

[0071] The embodiment of the present application does not limit the size and shape of the isolation structure 20. Optionally, the orthographic projection of the isolation structure 20 on the array substrate 10 may be a mesh structure. Of course, in some embodiments, the orthographic projection of the isolation structure 20 on the array substrate 10 may also be a plurality of independent annular structures, each independently arranged annular structure correspondingly provided with an opening, and the above-mentioned isolation structures 20 in various forms can meet the use requirements of the display panel 100, and in specific implementation, at least part of the area may be mesh-shaped, and at least part of the area may be annular.

[0072] The plurality of isolation openings formed by the isolation structure 20 and the light emitting units 30 a may be in a one-to-one correspondence, and one light emitting unit 30 a is disposed in one isolation opening.

[0073] The display panel 100 provided in the embodiment of the present application can separate two adjacent light-emitting units 30 a by providing an isolation structure 20 , which is beneficial to the formation of each light-emitting unit 30 and avoids crosstalk between light-emitting units 30 a emitting different colors.

[0074] Continue reading Figures 1 to 4 As shown, in some optional embodiments, a display device provided by an embodiment of the present application, the isolation structure 20 includes a first part 21 and a second part 22 which are arranged in sequence along a direction away from the array substrate 10, the orthographic projection of the first part 21 on the array substrate 10 is located within the orthographic projection of the second part 22 on the array substrate 10, and the second electrodes 33 of two adjacent light-emitting units 30a are disconnected at the isolation structure 20.

[0075] Optionally, the side of the second portion 22 facing the isolation opening may protrude from the first portion 21 . It can be understood that, in a plane parallel to the array substrate 10 , the side of the second portion 22 facing the isolation opening protrudes from the side of the first portion 21 facing the opening.

[0076] A display panel provided by an embodiment of the present application has an isolation structure 20 including a first part 21 and a second part 22 which are sequentially arranged in a direction away from the array substrate 10, and an orthographic projection of the first part 21 on the array substrate 10 is located within an orthographic projection of the second part 22 on the array substrate 10. When the display panel 100 is formed, due to the presence of the isolation structure 20, multiple organic material layers 32, the second electrode 33, etc. can be formed by evaporation or the like without the aid of a fine metal mask plate. This helps to reduce the mask cost required for the preparation of the display panel 100 and is suitable for large-scale production.

[0077] In some optional embodiments, the display panel 100 provided in one embodiment of the present application further includes a pixel definition layer 50, the isolation structure 20 is disposed on a side of the pixel definition layer 50 away from the array substrate 10, the pixel definition layer 50 includes a pixel definition portion and a pixel opening formed by the pixel definition portion, and the light-emitting unit 30a is at least partially located in the pixel opening. The display panel provided in the embodiment of the present application can ensure the molding requirements of the light-emitting unit 30a by providing the pixel definition layer 50.

[0078] In some optional embodiments, each isolation opening is connected to one of the pixel openings. The above arrangement facilitates the formation of the light emitting unit 30a by direct evaporation or the like, helps reduce the mask cost required for the preparation of the display panel 100, and is suitable for mass production.

[0079] In some optional embodiments, the opening area of ​​the isolation opening is larger than the opening area of ​​the pixel opening. Through the above arrangement, when the light-emitting unit 30a is formed by direct evaporation, the light-emitting unit 30a is convenient to be filled in the pixel opening, thereby ensuring the coverage of the pixel opening by the light-emitting unit 30a and optimizing the display effect.

[0080] In some optional embodiments, the isolation structure 20 may be in a mesh shape as a whole.

[0081] Optionally, the display panel 100 may further include an encapsulation layer 40 , which may be used to protect the light-emitting unit 30 a to reduce the probability of water and oxygen intruding into the light-emitting structure, thereby improving the reliability of the light-emitting structure.

[0082] Optionally, the encapsulation layer 40 may include a first encapsulation layer 41 and a second encapsulation layer 42. The first encapsulation layer 41 may include a plurality of encapsulation parts, each of which is respectively arranged corresponding to each light-emitting unit 30a to achieve encapsulation of the light-emitting unit 30a. The second encapsulation layer 42 is arranged on a side of the first encapsulation layer 41 away from the array substrate 10, and the second encapsulation layer 42 covers the first encapsulation layer 41.

[0083] The first encapsulation layer 41 and the second encapsulation layer 42 are used together to achieve the encapsulation effect of the display panel 100, and the second encapsulation layer 42 is located on the side of the first encapsulation layer 41 away from the array substrate 10. The light-emitting units 30a of different thicknesses may cause the side of the first encapsulation layer 41 away from the array substrate 10 to be not a flat surface, which is likely to have an adverse effect on the upper film layer. In view of this, during the preparation process of the embodiment of the present application, the size and shape of the second encapsulation layer 42 can be controlled to make the second encapsulation layer 42 a whole-surface structure, and the surface of the second encapsulation layer 42 away from the array substrate 10 can be parallel or approximately parallel to the plane where the array substrate 10 is located, thereby reducing the impact on the subsequent film preparation.

[0084] In some optional embodiments, in a display panel 100 provided by an embodiment of the present application, in a first state, the power signal line VSS provides a power signal including a constant voltage to the connected light-emitting unit 30a to effectively ensure the display requirements of the light-emitting unit 30a.

[0085] In some optional embodiments, in a display panel 100 provided by an embodiment of the present application, in a second state, the power signal line VSS provides a sensing drive signal to the connected light-emitting unit 30a, which may be a pulse signal, and the light-emitting unit 30a is multiplexed as a pressure sensor. The reset signal line Vref is configured to transmit a sensing induction signal output from the pressure sensor, which may be capacitance information.

[0086] The above configuration is helpful to judge whether the corresponding area of ​​the light emitting unit 30a multiplexed as a pressure sensor is touched and the form of the touch through the change of the sensed capacitance information.

[0087] like Figure 5 As shown, Figure 5 1 is a schematic diagram of the structure of a display panel of another embodiment of the present application. In some optional embodiments, the display panel 100 provided in one embodiment of the present application further includes an electrode extension 34 and an auxiliary electrode 35, the orthographic projection of the auxiliary electrode 35 on the array substrate 10 covers at least part of the electrode extension 34, the electrode extension 34 and the auxiliary electrode 35 are insulated, the electrode extension 34 is electrically connected to the first electrode 31 of the light-emitting unit 30a, and the auxiliary electrode 35 is electrically connected to the second electrode 33 of the light-emitting unit 30a.

[0088] The display panel 100 provided in one embodiment of the present application can increase the touch-sensitive area of ​​the light-emitting unit 30a multiplexed as a pressure sensor, improve the sensitivity of touch sensing, and improve the accuracy of touch position determination by providing an electrode extension portion 34 and an auxiliary electrode 35 and limiting the electrical connection relationship between the two and the first electrode 31 and the second electrode 33 of the light-emitting unit 30a.

[0089] In some optional embodiments, in a display panel provided by an embodiment of the present application, the electrode extension portion 34 may be provided in the same layer as the first electrode 31 .

[0090] Through the above arrangement, the molding requirement of the electrode extension portion 34 can be guaranteed, and at the same time, it is helpful to ensure the electrical connection requirement between the electrode extension portion 34 and the first electrode 31 .

[0091] In some optional embodiments, when the electrode extension portion 34 and the first electrode 31 are disposed in the same layer, the electrode extension portion 34 may be extended from the first electrode 31. Of course, this is an optional implementation.

[0092] In some embodiments, the array substrate 10 may include a connecting line, the electrode extension portion 34 is connected to the first electrode 31 through the connecting line, and the connecting line and the electrode extension portion 34 are arranged in different layers. The connecting line may be arranged in a metal layer below the first electrode 31, for example, in one of the metal layers in the driving circuit layer 12 on the array substrate 10. The first electrode 31 and the electrode extension portion 34 may be electrically connected to the connecting line by means of vias, etc., so as to realize electrical connection between the first electrode 31 and the electrode extension portion 34.

[0093] In some optional embodiments, the second electrode 33 is in contact with and electrically connected to the auxiliary electrode 35. Through the above arrangement, the stability of the electrical connection between the second electrode 33 and the auxiliary electrode 35 can be ensured.

[0094] In some optional embodiments, the isolation structure 20 is at least partially a conductive material body and forms an auxiliary electrode 35. Through the above configuration, the isolation structure 20 can be connected to the second electrode 33 on the basis of ensuring the evaporation requirements when the light-emitting unit is formed, without adding other metal layers to make the auxiliary electrode 35, so that the isolation structure 20 integrates multiple functions at the same time and optimizes the performance of the display panel 100.

[0095] In some optional embodiments, on the array substrate 10, the orthographic projection of the electrode extension 34 partially overlaps with the orthographic projection of the second electrode 33 and / or the auxiliary electrode 35 to form an auxiliary capacitor. Through the above arrangement, the touch area of ​​the corresponding area of ​​the display panel 100 is increased, which is beneficial to touch sensing.

[0096] like Figure 6 As shown, Figure 6 1 is a top view of a display panel of another embodiment of the present application. In some optional embodiments, a display panel 100 provided by an embodiment of the present application has a first area 301 and a second area 302, the second electrodes 33 of each light-emitting unit 30a in the first area 301 are connected to each other, and each light-emitting unit 30a in the second area 302 can switch between a first state and a second state.

[0097] The first area 301 may at least partially surround the second area 302 . Of course, the first area 301 may also completely surround the second area 302 .

[0098] The number of the second area 302 may be one, or more.

[0099] The first area 301 may include a plurality of light emitting units 30 a , and the second area 302 may include a plurality of light emitting units 30 a .

[0100] The orthographic projection shape of the second area 302 on the array substrate 10 may be a circle, an ellipse or a polygon.

[0101] With the continuous development of the display technology field, display devices are also widely used in the vehicle field. Vehicle-mounted display devices usually set a touch key area in a local area. Therefore, by making the display panel 100 have a first area 301 and a second area 302, the second electrodes 33 of each light-emitting unit 30a in the first area 301 are connected to each other to form a surface electrode, so that the second electrodes 33 of each light-emitting unit 30a in the area where no touch key is set can be connected to form a surface electrode, which is conducive to sharing a power signal line VSS to transmit the power signal and reduce the number of wiring of the power signal line VSS. In addition, by making each light-emitting unit 30a in the second area 302 switchable between the first state and the second state, each light-emitting unit 30a in the second area 302 can be reused as a pressure sensor to realize the detection of the touch position.

[0102] In some optional embodiments, the light emitting units 30a in the second area are arranged in an array, and each row of light emitting units 30a is electrically connected to the same reset signal line. Through the above configuration, a reset signal can be provided to the light emitting units 30a in the same row through the same reset signal line.

[0103] A display device provided by an embodiment of the present application has a large area of ​​fingers when a person touches the display device. By making the second electrodes 33 of at least some of the light-emitting units 30a electrically connected through the first part 21 and sharing a power signal line VSS, it can ensure that the light-emitting unit 30a is reused as a pressure sensor and the touch position is determined by detecting changes in capacitance information. At the same time, the number of power signal lines VSS can be reduced, thereby simplifying the structure of the display device.

[0104] In some optional embodiments, each second electrode 33 of each light emitting unit 30a in the second area 302 may be electrically connected to the same power signal line. Of course, each second electrode 33 of each light emitting unit 30a in the second area 302 may also be connected to a power signal line respectively.

[0105] In some embodiments, the second electrodes 33 of the light emitting units 30a in the second area 302 may be insulated from each other, so that when the light emitting units 30a in the second area 302 are reused as pressure sensors, the accuracy of determining the touch position is improved.

[0106] In some optional embodiments, the portion of the isolation structure 20 located in the first region 301 may be made of a conductive material.

[0107] A display panel provided by an embodiment of the present application can ensure the formation of the second electrode 33 in the corresponding area by electrically connecting the second electrodes 33 of each light-emitting unit 30a located in the first area 301 through the first part 21, while simplifying the structure of the display device without setting additional connecting lines.

[0108] In some optional embodiments, in a display panel provided by an embodiment of the present application, the second electrodes 33 of the light-emitting units 30 a located in the first area 301 share a power signal line VSS.

[0109] like Figure 7 as well as Figure 8 As shown, Figure 7 is a schematic cross-sectional structural diagram of a display device according to another embodiment of the present application, Figure 8 This is a schematic diagram of a 3D touch control principle of a display device according to an embodiment of the present application.

[0110] On the other hand, an embodiment of the present application further provides a display device, including the display panel 100 provided by the above embodiments, which has the beneficial effects of the display panels provided by the above embodiments, and will not be repeated here.

[0111] In some optional embodiments, the display device provided by an embodiment of the present application further includes a touch panel 200 and a processor. The touch panel 200 is arranged on the side of the light-emitting device layer 30 away from the array substrate 10. The touch panel 200 includes a plurality of touch electrodes 210. The touch electrodes 210 are configured to feedback the coordinate information of the touch position of the display panel 100. The processor is configured to: obtain the coordinate information of the touch position of the display panel 100 fed back by the touch electrode 210; determine the light-emitting unit 30a to be multiplexed as a pressure sensor according to the coordinate information; control the light-emitting unit 30a multiplexed as a pressure sensor to switch from the first state to the second state and obtain the sensing signal of the touch position; and identify the touch mode of the touch position according to the sensing signal.

[0112] The touch panel 200 may be prepared in advance and then attached to a real panel. Of course, it may also be formed directly on the display panel 100 .

[0113] Optionally, the coordinate information obtained is the coordinate information in the X and Y axis directions. According to the coordinate information, it can be determined that the light-emitting unit 30a closest to the touch point determined by the coordinate information is the light-emitting unit 30a to be reused as a pressure sensor, and the touch mode of the touch position can be identified according to the capacitance information, such as pressing or releasing, long pressing or continuous pressing, etc.

[0114] The processor may be disposed in a non-display area of ​​the display panel 100 , and of course, may also be disposed on a surface of the display panel 100 away from the light emitting side.

[0115] The display device provided in the embodiment of the present application further includes a touch panel 200, so that the touch position can be determined in the coordinate system of the horizontal plane through the touch panel 200. Figure 7The touch position is determined in the X and Y axis directions shown, and the coordinates of the pressed position in the X and Y axes are determined. At the same time, it is also possible to detect the capacitance of the touch position by reusing part of the light-emitting unit 30a as a pressure sensor, and further confirm the pressed position according to the capacitance change to determine the pressed position on the Z axis, and realize the 3D touch solution of the X, Y, and Z axes, replacing the traditional simple X and Y axis capacitance touch solution, reducing the problems of false button touches and blind operation of multiple buttons, and can bring users a more realistic experience and feeling, and expand the application scenarios of touch screens in the automotive field. By setting a processor, effective control of the 3D touch effect can be achieved. And the accuracy of the touch position and the touch mode can be verified according to the coordinate information of the touch position and the capacitance information, and different display interfaces can be given to the display device according to different pressing modes.

[0116] In some optional embodiments, in a display device provided by an embodiment of the present application, the touch electrode 210 and the light-emitting unit 30a are staggered in the orthographic projection on the array substrate 10. Specifically, the position of the light-emitting unit corresponds to the effective light-emitting area of ​​the light-emitting device layer, that is, the area where the pixel opening is located.

[0117] Through the above arrangement, the blocking of the light emitted by the light-emitting unit 30a by the touch electrode 210 can be effectively reduced, and the display effect can be guaranteed while ensuring the 3D touch function.

[0118] In some optional embodiments, in a display device provided by an embodiment of the present application, the touch mode includes a pressing mode and a releasing mode, the sensing signal includes capacitance information, and the processor is configured to:

[0119] When the capacitance value fed back by the capacitance information is greater than the first threshold, it is determined that the touch mode is the pressing mode.

[0120] When the capacitance value fed back by the capacitance information is equal to the first threshold, it is determined that the touch mode is the release mode.

[0121] The first threshold value may be determined according to capacitance information that can be detected when the light emitting unit 30a to be multiplexed as a pressure sensor is not touched, and the capacitance value fed back by the capacitance information at this time may be determined as the first threshold value.

[0122] When the capacitance value fed back by the capacitance information is greater than the first threshold, it indicates that there is a touch action at the current moment, and the pressure generated by the human hand touch action causes the capacitance information to change, and the touch mode is determined to be the pressing mode.

[0123] When the capacitance value fed back by the capacitance information is equal to the first threshold, it indicates that there is no touch action at the current moment, and the capacitance value fed back by the capacitance information is consistent with that in the untouched state, and the touch mode is determined to be the release mode.

[0124] A display device provided by an embodiment of the present application can, through the above-mentioned setting, determine whether the touch mode is in a pressing mode or a releasing mode according to the relationship between the capacitance value fed back by the capacitance information and the first threshold, so that the display device matches the corresponding display requirements according to different touch modes.

[0125] In some optional embodiments, in the display device provided by some embodiments of the present application, the pressing mode includes a double-click mode and a long press mode, and the processor is configured to:

[0126] When the light emitting unit 30a multiplexed as a pressure sensor is in the second state, and the capacitance value of the capacitance information feedback at least twice is greater than the first threshold, the pressing mode is determined to be the double-click mode. Optionally, in the blank section of two adjacent display frames of the display device, the capacitance information feedback at least twice has a capacitance value greater than the first threshold, and the pressing mode can be determined to be the double-click mode.

[0127] When the light emitting unit 30a multiplexed as a pressure sensor is in the second state, and the capacitance information feedback capacitance value is continuously the first threshold value within a predetermined time period, the pressing mode is determined to be a long pressing mode. Optionally, the predetermined time period may be less than the duration of the blank section of the display device between two adjacent display frames.

[0128] The display device provided in some embodiments of the present application can make the display device enter different interfaces according to different pressing modes, such as double-click mode or long press mode. For example, in the same touch area, if the double-click mode is used, the display device can enter the first display interface, while if the touch mode is used, the display device can enter the second display interface. This can ensure the diversified display of the display device, improve the user experience, and further optimize the performance of the display device.

[0129] In some optional embodiments, the processor is further configured to:

[0130] When the light-emitting unit 30a to be multiplexed as a pressure sensor is not touched, the reset signal line Vref is controlled to provide a reset signal to the connected light-emitting unit 30a, the power signal line VSS is controlled to provide a sensing drive signal to the connected light-emitting unit 30a, and the reset signal line Vref is controlled to sense the capacitance information of the light-emitting unit to be multiplexed as a pressure sensor.

[0131] The capacitance value fed back by the capacitance information is determined as the first threshold.

[0132] The display device provided in some embodiments of the present application determines the first threshold value in the above manner, which helps to ensure the accuracy of touch mode determination and optimize the performance of the display device.

[0133] like Figure 3 , Figure 4 as well as Fig. 9As shown, in some optional embodiments, an embodiment of the present application provides a display device, the array substrate 10 includes a substrate 11 and a driving circuit layer 12 that are stacked, the power signal line VSS and the reset signal line Vref are at least partially arranged in the driving circuit layer 12, the driving circuit layer 12 includes a plurality of pixel circuits 121 and a light-emitting control line EM, each pixel circuit 121 is electrically connected to at least one light-emitting unit 30a, the reset transistor M5 of the pixel circuit 121 is connected between the reset signal line Vref and the first electrode 31, the light-emitting control transistor T7 of the pixel circuit 121 is connected between the driving transistor of the pixel circuit 121 and the first electrode 31, and the processor is further configured as follows:

[0134] When the light control signal on the light control line EM controls the light control transistor M5 of the pixel circuit 121 to turn off so that the light emitting unit 30a stops emitting light, the processor controls the light emitting unit 30a multiplexed as a pressure sensor to switch from the first state to the second state and obtain the sensing signal of the touch position. That is, the reset signal line Vref provides a reset signal to the connected light emitting unit 30a, and the power signal line VSS provides a sensing drive signal to the connected light emitting unit 30a, and the sensing drive signal can be a pulse signal. The light emitting unit 30a is multiplexed as a pressure sensor, and the reset signal line Vref is configured to transmit the sensing signal output by the pressure sensor, which can be capacitance information.

[0135] Through the above configuration, the reuse of the light emitting unit 30a can be ensured while the normal display of the display device will not be affected.

[0136] 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: An array substrate is provided with a power signal line and a reset signal line; a light-emitting device layer, located on the array substrate, the light-emitting device layer comprising a plurality of light-emitting units, the light-emitting units comprising a first electrode, an organic material layer and a second electrode, the first electrode being arranged on a side of the organic material layer facing the array substrate, the first electrode being electrically connected to the reset signal line, and the second electrode being electrically connected to the power signal line; Wherein, at least part of the light emitting units are switched between the first state and the second state; In the first state, the power signal line provides a power signal to the connected light-emitting unit, and the light-emitting unit is used for display; In the second state, the reset signal line provides a reset signal to the connected light-emitting unit, the power signal line provides a sensing drive signal to the connected light-emitting unit, the light-emitting unit is multiplexed as a pressure sensor, and the reset signal line is configured to transmit a sensing induction signal output from the pressure sensor.

2. The display panel according to claim 1, characterized in that: The power supply signal includes a power supply signal; Preferably, the sensing drive signal comprises a pulse signal; Preferably, the sensing signal includes capacitance information.

3. The display panel according to claim 1, characterized in that: The display panel further comprises an isolation structure, the isolation structure is located on the array substrate, the isolation structure encloses a plurality of isolation openings, and each of the light emitting units is arranged corresponding to one of the isolation openings; Preferably, the isolation structure comprises a first part and a second part which are sequentially arranged in a direction away from the array substrate, the orthographic projection of the first part on the array substrate is located within the orthographic projection of the second part on the array substrate, and the organic material layers of two adjacent light-emitting units are disconnected at the isolation structure; Preferably, the display panel further comprises a pixel definition layer, the isolation structure is arranged on a side of the pixel definition layer away from the array substrate, the pixel definition layer comprises a pixel definition portion and a pixel opening formed by the pixel definition portion, and the light emitting unit is at least partially located in the pixel opening; Preferably, each of the isolation openings is interconnected with one of the pixel openings; Preferably, the opening area of ​​the isolation opening is larger than the opening area of ​​the pixel opening; Preferably, the isolation structure is in a mesh shape as a whole.

4. The display panel according to claim 3, characterized in that: The display panel comprises an electrode extension and an auxiliary electrode, wherein the orthographic projection of the auxiliary electrode on the array substrate covers at least a portion of the electrode extension, the electrode extension and the auxiliary electrode are insulated, the electrode extension is electrically connected to the first electrode of the light-emitting unit, and the auxiliary electrode is electrically connected to the second electrode of the light-emitting unit; Preferably, the electrode extension portion is arranged in the same layer as the first electrode; Preferably, the electrode extension portion extends from the first electrode, or the array substrate further comprises a connecting line, the electrode extension portion is connected to the first electrode via the connecting line, and the connecting line and the electrode extension portion are arranged in different layers; Preferably, the second electrode is in contact with and electrically connected to the auxiliary electrode; Preferably, the isolation structure is at least partially made of a conductive material and forms the auxiliary electrode; Preferably, on the array substrate, the orthographic projection of the electrode extension portion partially overlaps with the orthographic projection of the second electrode and / or the auxiliary electrode to form an auxiliary capacitor.

5. The display panel according to claim 1, characterized in that: The display panel has a first area and a second area, the second electrodes of the light-emitting units in the first area are connected to each other, and the light-emitting units in the second area switch between the first state and the second state; Preferably, the light emitting units located in the second area are distributed in an array, and each row of the light emitting units is electrically connected to the same reset signal line; Preferably, each of the second electrodes of each of the light-emitting units located in the second area is electrically connected to the same power signal line; or, each of the second electrodes of each of the light-emitting units located in the second area is respectively connected to one of the power signal lines; Preferably, the second electrodes of the light-emitting units in the second region are insulated from each other.

6. A display device, characterized in that: include: A display panel as claimed in any one of claims 1 to 5.

7. The display device according to claim 6, characterized in that: The display device further includes: A touch panel, disposed on a side of the light emitting device layer away from the array substrate, the touch panel comprising a plurality of touch electrodes, the touch electrodes being configured to feed back coordinate information of a touch position of the display panel; The processor is configured to obtain the coordinate information, determine the light-emitting unit to be multiplexed as the pressure sensor according to the coordinate information; control the light-emitting unit multiplexed as the pressure sensor to switch from the first state to the second state and obtain the sensing signal of the touch position; and identify the touch mode of the touch position according to the sensing signal.

8. The display device according to claim 7, characterized in that: The touch electrode and the light emitting unit are arranged in a staggered manner on the orthographic projection of the array substrate.

9. The display device according to claim 7, characterized in that: The touch mode includes a pressing mode and a releasing mode, the sensing signal includes capacitance information, and the processor is configured to: When the capacitance value fed back by the capacitance information is greater than a first threshold, determining that the touch mode is the pressing mode; When the capacitance value fed back by the capacitance information is equal to the first threshold, determining that the touch mode is the release mode; Preferably, the pressing mode includes a double-click mode and a long press mode, and the processor is configured to: When the light emitting unit multiplexed as the pressure sensor is in the second state, and the capacitance values ​​of at least two capacitance information feedbacks are greater than the first threshold, it is determined that the pressing mode is the double-click mode; When the light emitting unit multiplexed as the pressure sensor is in the second state, and the capacitance value of the capacitance information feedback is continuously the first threshold value within a predetermined time period, it is determined that the pressing mode is the long pressing mode; Preferably, the processor is further configured to: When the light-emitting unit to be multiplexed as the pressure sensor is not touched, controlling the reset signal line to provide a reset signal to the connected light-emitting unit; Controlling the power signal line to provide the sensing drive signal to the connected light-emitting unit, and controlling the reset signal line to sense the capacitance information of the light-emitting unit to be multiplexed as the pressure sensor; The capacitance value fed back by the capacitance information is determined as the first threshold.

10. The display device according to claim 7, characterized in that: The array substrate comprises a stacked substrate and a driving circuit layer, the power signal line and the reset signal line are at least partially arranged in the driving circuit layer, the driving circuit layer comprises a plurality of pixel circuits and a light emission control line, each of the pixel circuits is electrically connected to at least one of the light emitting units, a reset transistor of the pixel circuit is connected between the reset signal line and the first electrode, and a light emission control transistor of the pixel circuit is connected between a driving transistor of the pixel circuit and the first electrode, and the processor is further configured as follows: When the light-emitting control signal on the light-emitting control line controls the light-emitting control transistor of the pixel circuit to turn off so that the light-emitting unit stops emitting light, the processor controls the light-emitting unit multiplexed as the pressure sensor to switch from the first state to the second state and obtains the sensing induction signal of the touch position.

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