CN118349129A - Display panel - Google Patents

Abstract

The embodiment of the invention relates to the technical field of touch display, and discloses a display panel, which comprises: a substrate; a glass cover plate; and the packaging layer is arranged between the substrate and the glass cover plate, and a pressure sensor for sensing the pressure applied to the glass cover plate is arranged in the packaging layer. Compared with the prior art, the display panel has the advantages that the pressure sensor is integrated in the packaging layer of the display panel, so that the packaging layer is multiplexed into the pressure sensor, the number of the film layers of the display panel can be reduced, the integration level of the display panel is improved, and the volume and the weight of the display panel are reduced.

Description

Display panel

Technical Field

The embodiment of the invention relates to the technical field of touch display, in particular to a display panel.

Background

The intellectualization and the thinning of the touch display module are development trend of display technology, wherein the realization of pressure detection on a touch panel is an important direction, and the pressure detection has great application value in aspects of preventing false touch, expanding touch function, increasing operation mode and the like. The prior art scheme is that a touch sensing layer and a pressure detection layer are independently arranged outside a display panel, and the display panel, the touch sensing layer and the pressure detection layer are arranged in a stacked manner, so that the touch position is detected through the touch sensing layer, and the touch pressure is detected through the pressure detection layer. However, the existing scheme makes the whole touch display module have low integration level, and large thickness and weight.

Disclosure of Invention

The invention provides a display panel, which is used for solving the problems of low integration level, large thickness and large weight of the conventional touch display module.

In order to solve the above technical problems, an embodiment of the present invention provides a display panel, including:

A substrate; a glass cover plate; and the packaging layer is arranged between the substrate and the glass cover plate, and a pressure sensor for sensing the pressure applied to the glass cover plate is arranged in the packaging layer.

Optionally, the encapsulation layer includes a first buffer layer including a conductive polymer and piezoresistive nanoparticles.

Optionally, the packaging layer further includes a second buffer layer stacked with the first buffer layer, where the second buffer layer includes the conductive polymer and the piezoresistive nanoparticles, and the second buffer layer and the first buffer layer together form a pressure sensing layer of the pressure sensor.

Optionally, the pressure sensor further comprises a first metal layer and a second metal layer, the first buffer layer and the second buffer layer are both located between the first metal layer and the second metal layer, the first metal layer is electrically connected with the first buffer layer, the second metal layer is electrically connected with the second buffer layer, and the first metal layer and the second metal layer respectively form two electrodes of the pressure sensor.

Optionally, the touch sensor further comprises a third metal layer, the first metal layer is located on one side, away from the substrate, of the first buffer layer, the third metal layer is located between the first metal layer and the glass cover plate and is arranged in an insulating mode with the first metal layer, and the first metal layer and the third metal layer form the touch sensor.

Optionally, the touch sensor further comprises a first sub-electrode layer and a second sub-electrode layer which are arranged on the same layer and are mutually insulated, the first metal layer is located on one side, away from the substrate, of the first buffer layer, the first sub-electrode layer and the second sub-electrode layer are located between the first metal layer and the glass cover plate and are arranged in an insulating mode with the first metal layer, and the first sub-electrode layer and the second sub-electrode layer form the touch sensor.

Optionally, the light-emitting device further comprises a light-emitting layer positioned on one side of the first metal layer close to the glass cover plate, and the second metal layer further forms a cathode layer of the light-emitting layer.

Optionally, the encapsulation layer includes a first buffer layer and a second buffer layer, the second buffer layer including a conductive polymer and/or conductive particles; the pressure sensor comprises a first electrode layer and a pressure sensing layer, wherein the first electrode layer and the pressure sensing layer are arranged between the first buffer layer and the second buffer layer in a stacked mode, and the second electrode layer is arranged on one side, away from the pressure sensing layer, of the first buffer layer or the second buffer layer.

Optionally, the pressure sensing layer is a film layer coated or printed on a surface of the first electrode layer facing the second electrode layer.

Optionally, the light-emitting device further comprises a light-emitting layer located between the encapsulation layer and the glass cover plate, and the second electrode layer further forms a cathode layer of the light-emitting layer.

Optionally, the packaging layer includes a first buffer layer and a second buffer layer, and the pressure sensor is sandwiched between the first buffer layer and the second buffer layer.

Optionally, the packaging layer includes a first buffer layer and a second buffer layer that are stacked, where the first buffer layer and the second buffer layer each include a conductive polymer and/or conductive particles; the pressure sensor comprises a pressure sensing layer, and the pressure sensing layer is a film layer coated or printed on the first buffer layer or the second buffer layer.

Optionally, the electronic measuring device is further electrically connected with the pressure sensor, the pressure sensor is a piezoresistive sensor, and the electronic measuring device is used for detecting resistance change of the piezoresistive sensor.

For the related technology, the packaging layer of the display panel is multiplexed into the pressure sensor by integrating the pressure sensor in the packaging layer of the display panel, so that the number of the film layers of the display panel can be reduced, the integration level of the display panel is improved, and the volume and the weight of the display panel are reduced.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.

Fig. 1 is a schematic diagram of a laminated structure of a display panel according to a first embodiment of the present invention;

fig. 2 is a schematic diagram of a laminated structure of a first buffer layer and a second buffer layer of a display panel according to a first embodiment of the present invention;

fig. 3 is a schematic diagram of a laminated structure of a pressure sensor of a display panel according to a first embodiment of the present invention;

fig. 4 is a schematic diagram of a laminated structure of a touch sensor of a display panel according to a first embodiment of the present invention;

fig. 5 is a schematic structural view of a light emitting layer of a display panel according to a first embodiment of the present invention;

fig. 6 is a schematic structural view of a cathode layer of a display panel according to a first embodiment of the present invention;

fig. 7 is a schematic diagram of a laminated structure of a display panel according to a first embodiment of the present invention;

Fig. 8 is a schematic view showing a structure in which a touch sensor electrode layer is separately provided in another display panel according to the first embodiment of the present invention;

fig. 9 is a schematic view showing a structure of a common touch sensor electrode layer in another display panel according to the first embodiment of the present invention;

Fig. 10 is a schematic diagram of a laminated structure of a display panel according to still another embodiment of the present invention;

FIG. 11 is a schematic diagram of a laminated structure of a display panel without a second buffer layer according to a first embodiment of the present invention;

Fig. 12 is a schematic view of a laminated structure of a further display panel according to the first embodiment of the present invention;

fig. 13 is a schematic diagram of a laminated structure of a display panel without an insulating layer according to a first embodiment of the present invention.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the following detailed description of the embodiments of the present application will be given with reference to the accompanying drawings. However, those of ordinary skill in the art will understand that in various embodiments of the present application, numerous technical details have been set forth in order to provide a better understanding of the present application. The claimed application may be practiced without these specific details and with various changes and modifications based on the following embodiments.

In the embodiments of the present invention, terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate azimuth or positional relationship based on that shown in the drawings. These terms are only used to better describe the present invention and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present invention will be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish between different devices, elements, or components (the particular species and configurations may be the same or different), and are not used to indicate or imply the relative importance and number of devices, elements, or components indicated. Unless otherwise indicated, the meaning of "a plurality" is two or more.

When the existing touch display module is used for realizing the pressure detection function, a touch sensing layer and a pressure detection layer are required to be independently arranged, for example, a pressure detection sensor is additionally arranged at the bottom or around the screen. The whole touch display module has the problems of low integration level, large thickness, large weight and the like, and is not beneficial to the miniaturization design of the electronic equipment carrying the touch display module.

In order to solve the above technical problem, one embodiment of the present invention provides a display panel, including: a substrate; a glass cover plate; and the packaging layer is arranged between the substrate and the glass cover plate, and a pressure sensor for sensing the pressure applied to the glass cover plate is arranged in the packaging layer.

In the display panel of the embodiment, the pressure sensor is integrated in the packaging layer, so that the packaging layer is multiplexed into the pressure sensor, the number of film layers of the display panel can be reduced, the integration level of the display panel is improved, and the volume and the weight of the display panel are reduced.

The implementation details of the display panel of this embodiment are specifically described below, and the following description is merely provided for understanding the implementation details, and is not necessary to implement this embodiment.

In the present embodiment, the type of the display panel 100 is not particularly limited, and may be an IPS (In-PLANE SWITCHING ) screen, an OLED screen, a flexible screen that is foldable and bendable, or a screen that is not foldable and bendable.

Referring to fig. 1, the display panel 100 of the present embodiment includes a substrate 101, a glass cover plate 102, and an encapsulation layer 103 disposed between the substrate 101 and the glass cover plate 102. Wherein a pressure sensor for sensing a pressure applied to the glass cover plate 102 is provided in the encapsulation layer 103.

By this configuration, the package layer 103 is multiplexed as a pressure sensor, and the number of layers of the display panel 100 can be reduced, the integration level of the display panel 100 can be improved, and the volume and weight of the display panel 100 can be reduced.

In general, the first buffer layer in the display panel is made of an insulating material, and is disposed inside the display panel, so as to buffer the impact (such as drop, collision, etc.) received by the display panel and caused by various factors. Referring to fig. 2, in one embodiment of the present invention, the encapsulation layer 103 includes a first buffer layer 1031, the first buffer layer 1031 includes a conductive polymer and piezoresistive nanoparticles, and the first buffer layer 1031 forms a pressure sensing layer of the pressure sensor. It is understood that the first buffer layer 1031 may be a mixture of conductive polymer and piezoresistive nanoparticles.

The first buffer layer 1031 may be a matrix of inorganic material, in which conductive polymer and piezoresistive nano material are doped, thereby forming a film layer having conductivity and piezoelectric effect, and when the glass cover plate 102 is pressurized, the first buffer layer 1031 may detect the pressure. In other embodiments of the present invention, metal nanoparticles are included in the first buffer layer 1031 to enhance the conductive properties of the first buffer layer 1031.

In the embodiment of the present invention, the first buffer layer 1031 may also be made of an organic material as a matrix. For example, the conductive polymer and the piezoresistive nanoparticles may be doped with an organic insulating material as a matrix, or the conductive polymer may be directly used as a matrix of the first buffer layer 1031 and the piezoresistive nanoparticles may be doped.

In particular embodiments of the present invention, the conductive polymer may be (3, 4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT: PSS), polyaniline (PANI), or a mixture of both, which has good conductivity and excellent transparency, making it suitable for use in display technology without impeding visual output, while its mechanical flexibility and stability under deformation makes it an ideal material for use in flexible OLED displays. The polyaniline can be doped to make the polyaniline have conductivity, and can be widely applied to various sensors, the electrical property of the polyaniline can be changed under the action of mechanical stress, and the polyaniline can be used for force sensing.

In particular embodiments of the present invention, the piezoresistive nanoparticles may be one or more of Carbon Nanotubes (CNTs), graphene, and metal nanoparticles. By forming the pressure sensing layer 1022 by using the above components, the sensitivity and consistency of the pressure sensing layer 1022 can be optimized, and the accuracy and reliability of pressure detection can be improved. When the carbon nano tube is integrated into a matrix material (such as a polymer), the composite material can have piezoresistance, and the resistance of the carbon nano tube-polymer composite material changes under mechanical deformation, so that the carbon nano tube-polymer composite material can be applied to force sensing. The graphene has high conductivity and mechanical strength, can be used as nanoparticle filler in composite materials to improve the conductivity of the composite materials, and can also be used for piezoelectric film layers. Metallic nanoparticles, such as silver nanoparticles, may also be incorporated into piezoresistive composites, where the distance between the nanoparticles changes under mechanical deformation, thereby changing the electrical resistance of the material, and may be used for force sensing.

The internal packaging layer of the existing display panel is generally used for isolating external water vapor and the like, so that the metal film layer, devices and the like in the display panel are prevented from being corroded or polluted. Referring to fig. 2, in some embodiments of the present invention, the encapsulation layer 103 may further include a second buffer layer 1032 disposed in a layered relationship with the first buffer layer 1031, the second buffer layer 1032 including a conductive polymer and piezoresistive nanoparticles. It will be appreciated that the conductive polymer, piezoresistive nanoparticles, used in the second buffer layer 1032 can be selected and arranged with reference to the foregoing.

Alternatively, the second buffer layer 1032 may be disposed on a side of the first buffer layer 1031 facing the substrate 101, or may be disposed on a side of the first buffer layer 1031 facing away from the substrate 101, which is illustrated as an example.

In this embodiment, the first buffer layer 1031 and the second buffer layer 1032 are multiplexed as the pressure sensing layer of the pressure sensor, so that the number of internal film layers of the encapsulation layer 103 can be reduced, the structure of the display panel 100 is simplified, and the manufacturing difficulty is reduced.

Referring to fig. 3, in some embodiments, the display panel 100 further includes a first metal layer 104 and a second metal layer 105, the first buffer layer 1031 and the second buffer layer 1032 are located between the first metal layer 104 and the second metal layer 105, the first metal layer 104 is electrically connected to the first buffer layer 1031, the second metal layer 105 is electrically connected to the second buffer layer 1032, and the first metal layer 104 and the second metal layer 105 constitute an electrode layer of the pressure sensor. Specifically, the first metal layer 104 is disposed on a surface of the buffer layer 1031 facing the glass cover 102, the first metal layer 104 is in electrical contact with the first buffer layer 1031, the second metal layer 1032 is disposed on a surface of the second buffer layer 1032 facing the substrate 101, and the second metal layer 105 is in electrical contact with the second buffer layer 1032.

When the pressure sensing layer composed of the first buffer layer 1031 and the second buffer layer 1032 senses the pressure applied to the glass cover plate 102, the generated signal thereof may be transmitted to the data processor of the electronic device mounted with the display panel 100 provided by the present invention through the first metal layer 104 and the second metal layer 105.

Referring to fig. 4, in some embodiments, the display panel 100 further includes a third metal layer 106, the third metal layer 106 being located between the first metal layer 104 and the glass cover plate 102 and being disposed insulated from the first metal layer 104, the first metal layer 104 and the third metal layer 106 constituting a touch sensor. In other words, the touch sensor of the display panel 100 having one electrode layer common to the pressure sensor can reduce the number of layers inside the display panel 100, simplify the structure of the display panel 100, and reduce the weight and volume thereof.

With continued reference to fig. 4, electrical insulation between the first metal layer 104 and the third metal layer 106 may be performed by providing an insulating layer 107, where the insulating layer 107 may be an inorganic material film layer or an organic material film layer, and may be specifically selected according to practical situations, and is not specifically limited herein.

In other embodiments, the third metal layer 106 may be replaced by a first sub-electrode layer and a second sub-electrode layer that are disposed in the same layer and are insulated from each other, where the first sub-electrode layer and the second sub-electrode layer together form the touch sensor, and the first metal layer 104 is no longer an electrode layer common to the touch sensor and the pressure sensor.

Referring to fig. 5, the display panel 100 may further include a light emitting layer 108 located on a side of the first metal layer 104 near the glass cover plate 102, more specifically, the light emitting layer 108 is located on a surface of the third metal layer 107 facing the glass cover plate 102, and the second metal layer 105 serves as a cathode layer of the light emitting layer 108. That is, in the display panel 100, the second metal layer 105 is multiplexed as electrode layers of the pressure sensor and the light emitting layer 108, further reducing the number of film layers of the display panel 100, simplifying the internal structure thereof.

In the embodiment of the present invention, the type of the light emitting layer 108 is not particularly limited, and may be, for example, micro-LED, an organic material light emitting layer, and preferably an organic material light emitting layer.

Referring to fig. 6, the second metal layer 105 may also be an electrode layer of a pressure sensor, where a separate cathode layer 1081 may be disposed under the second metal layer 105, and an insulating layer 107 may be disposed between the cathode layer 1081 and the second metal layer 105 to electrically insulate the cathode layer 1081 from the second metal layer 105.

Referring to fig. 7, the display panel 100 is provided with a polarizer 109 on a surface of the light emitting layer 108 facing the glass cover plate 102 side, and the polarizer 109 is used to filter light emitted from the light emitting layer 108 so that light passing through the polarizer 109 can be normally used for display.

With continued reference to fig. 7, the display panel 100 may further include an optical adhesive layer 110 between the polarizer 109 and the glass cover 102, and the glass cover 102 and the polarizer 109 are adhered and fixed by the optical adhesive layer 110.

Referring to fig. 8 and 9, in other embodiments, the pressure sensor has a first electrode layer 111 and a pressure sensing layer 112 that are independently disposed, wherein the first electrode layer 111 and the pressure sensing layer 112 are sandwiched between a first buffer layer 1031 and a second buffer layer 1032.

For example, the first buffer layer 1031 is located on the side of the second buffer layer 1031 facing the glass cover plate 102, the first electrode layer 111 is located on the side of the first buffer layer 1031 facing the second buffer layer 1032, and the pressure sensing layer 112 is located on the side of the first electrode layer 111 facing the second buffer layer 1032 and is in electrical contact with the first electrode layer 111. At this point, the second buffer layer 1032 may include (e.g., be doped with) one or more of a conductive polymer, conductive particles, and thus be in electrical contact with the pressure sensing layer 112.

The second buffer layer 1032 is provided with a second electrode layer 113 on a side facing the substrate 101, the second electrode layer 113 being in electrical contact with the second buffer layer 1032, such that the first electrode layer 111, the pressure sensing layer 112, the second buffer layer 1032 and the second electrode layer 113 together constitute a force sensor.

For a touch sensor, it may be composed of two metal layers disposed in different layers and insulated from each other, such as the first metal layer 104 and the third metal layer 106 in fig. 8. Or may be formed of one layer having two sub-electrode layers insulated from each other, such as the first metal layer 104 in fig. 9, and the first metal layer 104 may include the above-described first sub-electrode layer and second sub-electrode layer, in which case the number of film layers of the display panel 100 may be reduced.

The pressure sensing layer 112 may be a coating or a printing layer, for example, conductive polymer and piezoresistive nano particles may be injected or dispersed into a carrier such as ink, and the ink may be coated on the surface of the first electrode layer 111 facing the second electrode layer 113; or by printing/printing, the pressure sensing layer 112 is formed on the surface of the first electrode layer 111 facing the second electrode layer 113 side. Thus, the thickness of the pressure sensing layer 112 may be reduced, thereby reducing the thickness and volume of the display panel 100. The pressure sensing layer 112 may also be disposed on a surface of the second buffer layer 1032 facing the first electrode layer 111.

In the embodiment of the present invention, the second electrode layer 113 may also serve as a cathode layer of the light emitting layer 108, i.e. the pressure sensor and the light emitting layer 108 have one common electrode layer. By sharing the electrode layer, the number of layers inside the display panel 100 can be reduced.

Referring to fig. 10, in another manner, the first buffer layer 1031 may include one or more of conductive polymer and conductive particles, the pressure sensing layer 112 may be disposed on a side of the first buffer layer 1031 facing the second buffer layer 1032, and the second electrode layer 113 may be disposed on a side of the pressure sensing layer 112 facing the second buffer layer 1032. At this time, the first metal layer 104 may be used as an upper electrode of the pressure sensor, and the second electrode layer 113 may be used as a lower electrode of the pressure sensor alone, i.e., the light emitting layer 108 has a separate cathode layer 1081.

For a touch sensor, it may be that two electrodes are formed by the first metal layer 104 and the third metal layer 106, as shown in fig. 10, where the touch sensor and the pressure sensor have one common electrode. When the third metal layer 106 is composed of two mutually insulated sub-electrode layers, there is no common electrode layer between the touch sensor and the pressure sensor, and the two sub-electrode layers constitute two electrode layers of the touch sensor.

Alternatively, the first electrode layer 111 may be left, and the first electrode layer 111 and the second electrode layer 112 may constitute two electrodes of the pressure sensor. The first metal layer 104 and the third metal layer 106 form two electrodes of the touch sensor.

In the embodiment of the present invention, the pressure sensing layer 112 may be provided on the surface of the first buffer layer 1031 facing the second buffer layer 1032 in the form of a coating or a printed layer, or on the surface of the second electrode layer 113 facing the first buffer layer 1031.

Referring to fig. 11, when the encapsulation layer 103 is not provided with the second buffer layer 1032, the second electrode layer 113 may also be multiplexed as a cathode layer of the light emitting layer 108, thereby further reducing the number of film layers of the display panel 100.

Referring to fig. 12 and 13, in other possible embodiments, the pressure sensor is sandwiched between a first buffer layer 1031 and a second buffer layer 1032. For example, the pressure sensor has a first electrode layer 111, a pressure sensing layer 112, and a second electrode layer 113 that are independent and are laminated in this order from the glass cover plate 102 toward the substrate 101. Alternatively, the insulating layer 107 or the first buffer layer 1031 may be omitted, and fig. 13 illustrates that the insulating layer 107 is omitted.

The two electrodes of the touch sensor may be provided as electrode layers having two different layers and being insulated from each other, one of the two electrode layers may be an electrode layer common to the pressure sensor, or both of the two electrode layers may be provided independently of the pressure sensor, or the two electrodes of the touch sensor may be constituted of two sub-electrode layers provided in the same layer and being insulated from each other.

In yet another possible embodiment, the first buffer layer 1031 and the second buffer layer 1032 each include one or more of conductive polymer and conductive particles, a film layer with conductive properties is formed, and the pressure sensing layer 112 is disposed between the first buffer layer 1031 and the second buffer layer 1032.

The first metal layer 104 is electrically contacted with the first buffer layer 1031 to serve as an upper electrode of the pressure sensor, and the cathode layer of the light emitting layer 108 is electrically contacted with the second buffer layer 1032 to serve as a lower electrode of the pressure sensor.

It is appreciated that the pressure sensing layer 112 may be disposed on the first buffer layer 1031 or the second buffer layer 1032 in the form of a coating or a printed layer, preferably between the first buffer layer 1031 or the second buffer layer 1032.

In still other embodiments, the first buffer layer 1031 and the second buffer layer 1032 may be alternatively arranged, and the arrangement of other film layers may be adaptively adjusted according to the foregoing description, which is not repeated herein.

In some embodiments, the display panel 100 further includes an electronic measurement device electrically connected to the pressure sensor, in particular, the electronic measurement device is electrically connected to an electrode of the pressure sensor to detect a change of the resistance of the pressure sensing layer 112 under the pressure, so as to determine whether the pressure applied to the glass cover 102 is operated by a user, so as to avoid that the unexpected pressure affects the normal display or touch function of the display panel 100.

A second embodiment of the present invention provides a method for manufacturing a display panel, for manufacturing the display panel 100 with a pressure sensor, including:

providing a substrate 101, forming a packaging layer 103 on the substrate 101;

a glass cover plate 102 is arranged on one side of the encapsulation layer 103 away from the substrate 101 to cover the encapsulation layer 103;

wherein the encapsulation layer 103 is formed with a pressure sensor for sensing a pressure applied to the glass cover plate 102.

By integrating the pressure sensor within the encapsulation layer 103 of the display panel 100, the number of layers of the internal film of the display panel 100 can be reduced, thereby simplifying the internal structure of the display panel 100 and reducing the volume and weight of the display panel 100.

It should be noted that, after the glass cover plate 102 is disposed on the encapsulation layer 103, the encapsulation layer 103 with the glass cover plate 102 may be fixed on the substrate 101.

Before forming the encapsulation layer 103 on the substrate 101, further includes: a second metal layer 105 is formed on the substrate 101.

For forming the encapsulation layer 103 on the substrate 101, specifically: a second buffer layer 1032 is formed on the substrate 101, the second buffer layer 1032 including a conductive polymer and piezoresistive nanoparticles.

For forming the encapsulation layer 103 on the substrate 101, further comprising: a first buffer layer 1031 is formed on the second buffer layer 1032, the first buffer layer 1031 including a conductive polymer and piezoresistive nanoparticles, the first buffer layer 1031 and the second buffer layer 1032 constituting the pressure sensing layer 112 of the pressure sensor.

After forming the first buffer layer 1031 on the second buffer layer 1032, it further includes: a first metal layer 104 is formed on the first buffer layer 1032. Among them, the first metal layer 104, the first buffer layer 1031, the second buffer layer 1032, and the second metal layer 105 constitute a pressure sensor.

After forming the first metal layer 104 on the first buffer layer 1032, further includes: forming an insulating layer 107 on the first metal layer 104, and forming a third metal layer 106 on the insulating layer 107, wherein the first metal layer 104, the insulating layer 107 and the third metal layer 106 constitute a touch sensor; or a first sub-electrode layer and a second sub-electrode layer which are insulated from each other and are provided in the same layer are formed on the insulating layer 107, and the first sub-electrode layer and the second sub-electrode layer constitute a touch sensor.

The third metal layer 106, the insulating layer 107 and the first metal layer 104 together form a touch sensor, that is, the pressure sensor and the touch sensor have one common electrode layer, or the number of film layers of the display panel 100 may be reduced. The touch sensor is formed using the first sub-electrode layer and the second sub-electrode layer, and there is no common electrode layer between the pressure sensor and the touch sensor, and the number of film layers of the display panel 100 is not increased.

After forming the third metal layer 106 or the first sub-electrode layer and the second sub-electrode layer on the insulating layer 107, the method further includes: a light emitting layer 108 is formed on the third metal layer or the first and second sub-electrode layers, and the second metal layer 105 constitutes a cathode layer of the light emitting layer 108.

By sharing the second metal layer 105 as an electrode layer of the pressure sensor and the light emitting layer 108, the number of film layers of the display panel 100 can be further reduced.

In some embodiments, before forming the second metal layer 105 on the substrate 101, further comprising: a cathode layer 1081 and an insulating layer 107 are sequentially formed on the substrate 101, and the cathode layer 1081 and the second metal layer 105 are electrically insulated by the insulating layer 107.

At this time, the cathode layer 1081 independently serves as a cathode of the light-emitting layer 108, and functions to excite the light-emitting layer 108 to emit light.

In some embodiments, for forming the encapsulation layer 103 on the substrate 101, specifically: a second buffer layer 1032 is formed on the substrate 101, the second buffer layer 1032 including a conductive polymer and conductive particles.

Forming the encapsulation layer 103 on the substrate 101 further includes: the first buffer layer 1031 is formed on the second buffer layer 1032.

Before forming the first buffer layer 1031 on the second buffer layer 1032, further comprising: a pressure sensing layer 112 and a first electrode layer 111 are sequentially formed on the first buffer layer 103.

Before forming the second buffer layer 1032 on the substrate 101, further includes: a second electrode layer 113 is formed on the substrate 101.

Among them, the first electrode layer 111, the pressure sensing layer 112, the second buffer layer 1032, and the second electrode layer 113 constitute a pressure sensor. And, the second electrode layer 113 may be multiplexed as a cathode layer of the light emitting layer 108.

In some embodiments, for forming the encapsulation layer 103 on the substrate 101, specifically: a second buffer layer 1032 and a first buffer layer 1031 are sequentially formed on the substrate 101.

Before forming the first buffer layer 1031 on the second buffer layer 1032, further comprising: the second electrode layer 113, the pressure sensing layer 112, and the second electrode layer 113 are sequentially formed on the second buffer layer 1032.

A third embodiment of the present invention provides a display panel deformation detection method applied to the display panel 100 with a pressure sensor, including:

Applying pressure to the glass cover plate 102 of the display panel 100, the pressure being sensed by a pressure sensor, which is a piezoresistive sensor;

the electronic measuring device in the display panel 100 detects the amount of change in the resistance value of the pressure sensor, and calculates the mechanical deformation amount of the display panel 100 from the amount of change in the resistance value.

It will be appreciated that the electronic measurement device may detect a range of resistance values from milliohms to ohms, and the amount of change in resistance values may be indicative of the magnitude of the pressure, and for an object having a fixed young's modulus or elastic modulus, the amount of deformation corresponds to a specific stress, that is, for a deformation of the display panel 100 caused by a specific pressure, the magnitude of the pressure corresponding to the magnitude of deformation may be represented by the change in resistance values. Therefore, when the pressure applied to the glass cover plate 102 causes a certain degree of mechanical deformation of the display panel 100, by detecting the pressure, a change in resistance corresponding to the pressure can be obtained, thereby indirectly obtaining the deformation amount of the display panel 100.

The display panel provided in the embodiments of the present invention has been described in detail, and specific examples are used herein to illustrate the principles and embodiments of the present invention, and the description of the embodiments is only for aiding in understanding the concept of the present invention, and the detailed description and the application scope of the embodiments are not to be construed as limiting the invention.

Claims (13)

1. The display panel comprises a substrate and a glass cover plate, and is characterized in that an encapsulation layer is arranged between the substrate and the glass cover plate, and a pressure sensor is arranged in the encapsulation layer and used for sensing pressure applied to the glass cover plate.

2. The display panel of claim 1, wherein the encapsulation layer comprises a first buffer layer comprising a conductive polymer and piezoresistive nanoparticles.

3. The display panel of claim 2, wherein the encapsulation layer further comprises a second buffer layer disposed in a stack with the first buffer layer, the second buffer layer comprising the conductive polymer and the piezoresistive nanoparticles, the second buffer layer and the first buffer layer together comprising a pressure sensing layer of the pressure sensor.

4. The display panel of claim 3, further comprising a first metal layer and a second metal layer, wherein a pressure sensing layer formed by the first buffer layer and the second buffer layer is located between the first metal layer and the second metal layer, and wherein the first metal layer is electrically connected to the first buffer layer, and wherein the second metal layer is electrically connected to the second buffer layer, and wherein the first metal layer and the second metal layer respectively form two electrodes of the pressure sensor.

5. The display panel of claim 4, further comprising a third metal layer, the first metal layer being located on a side of the first buffer layer facing away from the substrate, the third metal layer being located between and insulated from the first metal layer and the glass cover plate, the first metal layer and the third metal layer constituting a touch sensor.

6. The display panel of claim 4, further comprising a first sub-electrode layer and a second sub-electrode layer disposed in a same layer and insulated from each other, the first metal layer being located on a side of the first buffer layer facing away from the substrate, the first sub-electrode layer and the second sub-electrode layer being located between the first metal layer and the glass cover plate and being disposed in an insulated manner from the first metal layer, the first sub-electrode layer and the second sub-electrode layer constituting a touch sensor.

7. The display panel according to any one of claims 4 to 6, further comprising a light-emitting layer on a side of the first metal layer close to the glass cover plate, the second metal layer further constituting a cathode layer of the light-emitting layer.

8. The display panel of claim 1, wherein the encapsulation layer comprises a first buffer layer and a second buffer layer, the second buffer layer comprising a conductive polymer and/or conductive particles;

The pressure sensor comprises a first electrode layer and a pressure sensing layer, wherein the first electrode layer and the pressure sensing layer are arranged between the first buffer layer and the second buffer layer in a stacked mode, and the second electrode layer is arranged on one side, away from the pressure sensing layer, of the second buffer layer.

9. The display panel of claim 8, wherein the pressure sensing layer is a film layer coated or printed on a side surface of the first electrode layer facing the second electrode layer.

10. The display panel according to claim 8 or 9, further comprising a light-emitting layer between the encapsulation layer and the glass cover plate, the second electrode layer further constituting a cathode layer of the light-emitting layer.

11. The display panel of claim 1, wherein the encapsulation layer comprises a first buffer layer and a second buffer layer, the pressure sensor being sandwiched between the first buffer layer and the second buffer layer.

12. The display panel according to claim 1, wherein the encapsulation layer comprises a first buffer layer and a second buffer layer arranged in a stack, the first buffer layer and the second buffer layer each comprising a conductive polymer and/or conductive particles; the pressure sensor comprises a pressure sensing layer, and the pressure sensing layer is a film layer coated or printed on the first buffer layer or the second buffer layer.

13. The display panel of claim 1 or 11, further comprising an electronic measurement device electrically connected to the pressure sensor, the pressure sensor being a piezoresistive sensor, the electronic measurement device being configured to detect a change in resistance of the piezoresistive sensor.