WO2020223930A1

WO2020223930A1 - Display device and electronic equipment

Info

Publication number: WO2020223930A1
Application number: PCT/CN2019/086037
Authority: WO
Inventors: 林源城
Original assignee: 深圳市柔宇科技有限公司
Priority date: 2019-05-08
Filing date: 2019-05-08
Publication date: 2020-11-12
Also published as: CN113330445A

Abstract

Disclosed are a display device (100, 100a, 100b) and an electronic equipment. The display device (100, 100a, 100b) comprises a display panel (20), a detection component (40, 40a, 40b) and a fingerprint recognition module (60). When the display panel (20) is pressed, the transmitted light is blocked by an pressing object (10) to be reflected back into the display panel (20). The detection component (40, 40a, 40b) is used for generating a compensation signal according to the deformation of the display panel (20) when the display panel (20) is pressed. The fingerprint identification module (60) is connected to the detection component (40, 40a, 40b) and compensates the generated fingerprint image according to the compensation signal. The detection component (40, 40a, 40b) is arranged to compensate the generated fingerprint image according to the deformation generated when the display panel (20) is pressed, such that the compensated fingerprint image is clearer, and the accuracy and speed of fingerprint unlocking are improved.

Description

Display device and electronic equipment

Technical field

The embodiments of the present application relate to the field of display technology, and in particular to a display device and electronic equipment.

Background technique

Under the trend of full-screen display panels, the display panel unlocking methods mainly include four types of technical solutions: face recognition, iris recognition, under-screen optical fingerprint scheme, and back/side fingerprint recognition. The use experience of the under-screen optical fingerprint solution is better than that of back/side fingerprint recognition technology, and it has advantages over face recognition in terms of cost. The under-screen optical fingerprint solution will exist in parallel with technical solutions such as face recognition in the future.

However, the fingerprint area of the currently developed flexible folding screen will be deformed when pressed, resulting in poor imaging quality of the collected fingerprint and slow unlocking speed.

Summary of the invention

The embodiments of the present application aim to provide a display device and electronic equipment to solve the technical problems in the prior art.

The embodiments of this application provide the following technical solutions to solve their technical problems:

A display device includes: a display panel for emitting light, when the display panel is pressed by a pressing object, the emitted light is blocked by the pressing object and reflected back into the display panel;

The detection component is used to generate a compensation signal according to the deformation of the display panel when the display panel is pressed;

The fingerprint recognition module is connected to the detection component and compensates the generated fingerprint image according to the compensation signal; the shape of the display panel becomes the distance between the pressed object and the fingerprint recognition module and the unpressed The difference in the distance between the display panel and the fingerprint identification module at

Optionally, the display panel includes a touch electrode layer;

The detection component includes a pressure detection layer and an insulating layer, the touch electrode layer is disposed on one side of the insulating layer, and the pressure detection layer is disposed on the other side of the insulating layer away from the touch electrode layer, Wherein, the pressure detection layer, the insulating layer, and the touch electrode layer jointly constitute a capacitor structure;

When the display panel is pressed, the capacitance between the touch electrode layer corresponding to the pressed position and the pressure detection layer is greater than the capacitance between the touch electrode layer corresponding to the unpressed position and the pressure detection layer.

Optionally, let the plane where the pressure detection layer is located be a projection plane, and all orthographic projections of the touch electrode layer on the projection plane can be projected on the pressure detection layer.

Optionally, the insulating layer is made of elastic material.

Optionally, the display panel further includes a carrying substrate and a display function film layer, the display function film layer being laminated on the carrying substrate and used for emitting the light;

The fingerprint recognition module includes a fixed layer and an optical sensor component, the fixed layer is disposed on the side of the carrier substrate away from the display function film layer, and the optical sensor component is connected to the fixed layer.

Optionally, the detection component is arranged in the carrier substrate.

Optionally, the carrier substrate includes a first flexible substrate, an adhesion layer, and a second flexible substrate, and the adhesion layer is disposed on the first flexible substrate and the second flexible substrate In between, the detection component is arranged between the first flexible substrate and the adhesion layer or between the second flexible substrate and the adhesion layer.

Optionally, the detection component includes a piezoelectric material layer, a first conductive layer, and a second conductive layer;

The first conductive layer and the second conductive layer are respectively disposed on opposite sides of the piezoelectric material layer, and the fingerprint identification module is electrically connected to the first conductive layer and the second conductive layer, respectively ；

When the display panel is pressed, the voltage of the piezoelectric material layer corresponding to the pressed position is greater than the voltage of the piezoelectric material layer corresponding to the unpressed position.

Optionally, the first conductive layer is disposed on the side of the first flexible substrate facing the adhesion layer, and the second conductive layer is disposed on the adhesion layer facing the first flexible substrate. The side of the material;

Alternatively, the first conductive layer is disposed on the side of the adhesion layer facing the second flexible substrate, and the second conductive layer is disposed on the side of the second flexible substrate facing the adhesion layer. side.

Optionally, the detection component is a piezoelectric film sensor.

Optionally, the number of the fixing layer is two, the two fixing layers are respectively arranged on two opposite sides of the supporting substrate away from the side surface of the display function film layer, and the optical sensor assembly is arranged on two Between the fixed layers.

Optionally, the detection component is arranged between the carrier substrate and the optical sensor component.

Optionally, the detection component includes: an electrode layer laminated on a side surface of the carrier substrate facing the optical sensor component;

The distance detection layer is disposed on the optical sensor assembly and is opposite to the electrode layer, and the optical sensor assembly is electrically connected to the electrode layer and the distance detection layer, respectively, wherein the electrode The layer and the distance detection layer constitute a capacitance structure.

Optionally, the two fixing layers are provided with a preset thickness;

The two fixing layers, the optical sensor assembly and the supporting substrate jointly form a first gap;

The electrode layer, the first gap, and the distance detection layer together form a capacitor structure.

Optionally, the optical sensor assembly includes:

A transmission layer, both ends of the transmission layer are respectively connected to the two fixing layers, and the distance detection layer is laminated on the side of the transmission layer facing the electrode layer;

The fingerprint sensor is arranged on the side of the transmission layer away from the electrode layer.

Optionally, the optical sensor assembly further includes a base housing for accommodating the fingerprint sensor, and two ends of the base housing are respectively connected to the two fixing layers.

Optionally, the fixing layer includes: an optical adhesive layer disposed on a side of the supporting substrate away from the display function film layer;

The supporting layer is arranged on the side of the optical adhesive layer away from the supporting substrate, and the base shell is connected to the supporting layer.

The embodiments of this application also provide the following technical solutions to solve their technical problems:

An electronic device, comprising: the above-mentioned display device, processor, transceiver, memory and bus;

The display device is connected to the bus to connect to the processor, the transceiver and the memory through the bus.

Compared with the prior art, in the display device provided by the embodiment of the present application, the detection component is provided so that it can compensate the generated fingerprint image according to the deformation generated when the display panel is pressed, so that the The image of the fingerprint pattern is clearer, and the matching degree with the user's pre-stored fingerprint pattern is high, thus improving the accuracy and speed of fingerprint unlocking.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative work, other drawings may be obtained based on the structure shown in these drawings.

FIG. 1 is a schematic structural diagram of a display device provided by one of the embodiments of the present application;

FIG. 2 is a schematic diagram of a pressing object provided by one embodiment of the present application being pressed on the display device shown in FIG. 1;

3 is a schematic diagram of the structure of a touch electrode layer of the display device shown in FIG. 1;

4 is a schematic structural diagram of a display device provided by another embodiment of the present application;

FIG. 5 is a schematic structural diagram of a display device provided by still another embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of this application.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of this application. If there are descriptions related to "first", "second", etc. in the embodiments of this application, the descriptions of "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying their relative Importance or implicitly indicates the number of technical features indicated. Therefore, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on what can be achieved by a person of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that such a combination of technical solutions does not exist. , Not within the scope of protection required by this application.

Please refer to FIGS. 1 and 2 together. A display device 100 provided by an embodiment of the present application includes a display panel 20, a detection component 40, and a fingerprint recognition module 60.

The display panel 20 includes a liquid crystal display panel (TFT-LCD) or an OLED (Organic Light-Emitting Diode, organic light-emitting diode) display panel. The OLED display panel may be a flexible display panel or a transparent flexible display panel.

The display panel 20 is used to emit light. When the display panel 20 is a liquid crystal display panel, the backlight can promote the image formation of the liquid crystal pixel unit and cause the display panel 20 to emit light. The emitted light starts with the backlight as the light source. Through the gap between each liquid crystal pixel unit, it is emitted to the external environment of the display panel 20. When the display panel 20 is an OLED display panel, a light-emitting layer composed of several OLED light-emitting units in the OLED display panel generates the emitted light, where the emitted light starts from the light-emitting layer and passes through the gap between each OLED pixel unit , Transmitted to the external environment of the display panel 20.

In this embodiment, when the display panel 20 is pressed by the pressing object 10, the emitted light is blocked by the pressing object 10 and reflected back into the display panel 20, and the reflected light is reflected by the fingerprint recognition module 60 receive. For example, when the display panel 20 is a liquid crystal display panel, when the display panel 20 is pressed by the pressing object 10, the emitted light is blocked by the pressing object 10 and reflected, and the reflected light passes through each liquid crystal pixel unit. The gap between to the fingerprint identification module 60.

For another example, when the display panel 20 is an OLED display panel, when the display panel 20 is pressed by the pressing object 10, the emitted light is blocked by the pressing object 10 and reflected, and the reflected light passes through each OLED pixel unit The gap between to the fingerprint identification module 60.

The pressing object 10 may be a body part with a specific pattern such as a finger or a toe, or an object with a specific pattern.

The detection component 40 is used to generate a compensation signal according to the deformation of the display panel when the display panel is pressed.

Wherein, the deformation becomes the difference between the distance between the pressing object 10 and the fingerprint identification module 60 and the distance between the display panel and the fingerprint identification module 60 where it is not pressed. The detection component 40 can convert the deformation into a corresponding compensation signal, and send the compensation signal to the fingerprint identification module 60.

The deformation can be obtained by changing the capacitance value and voltage value at the pressed position of the detection component 40 and the capacitance value and voltage value at the unpressed position when the display panel 100 is pressed.

Specifically, when the display panel 20 is pressed by the pressing object 10, under the action of the pressing force, the deformation amount at the pressed and unpressed position of the detection assembly 40 is different, and the magnitude of the deformation causes the detection assembly 40 to press The capacitance value or voltage value of the unpressed area and the unpressed area are also different. For example, the deformation amount of the pressed area is greater than that of the unpressed area. The larger the amount of deformation, the greater the change in capacitance or voltage. Therefore, the The capacitance or voltage change of the pressure is greater than the capacitance or voltage change of the unpressed area, and the capacitance or voltage value of the pressure is greater than or less than the capacitance or voltage value of the unpressed area. Therefore, the deformation can be determined according to the capacitance value or the voltage value at the pressing position.

The fingerprint identification module 60 is connected to the detection component 40 and compensates the generated fingerprint image according to the compensation signal.

Specifically, first, the fingerprint identification module 60 generates a fingerprint image according to the received reflected light.

Combine the following equations to generate the fingerprint image:

Where Li is the image distance; Lo is the object distance; f _{e is the} equivalent focal length, and the object distance Lo is the distance between the display panel and the fingerprint identification module when it is not pressed.

Then the fingerprint identification module 60 determines the deformation according to the received compensation signal, and then compensates the generated fingerprint image according to the deformation.

Specifically, the fingerprint image is compensated in combination with the following equation:

Where Li is the image distance; Lo is the object distance; △Lo is the deformation; f _{e is the} equivalent focal length, and the object distance Lo is the distance between the display panel and the fingerprint identification module 60 when not pressed distance.

The generated fingerprint image is compensated according to the compensation signal, so that the imaging of the fingerprint pattern is clearer, and the degree of matching with the fingerprint pattern pre-stored by the user is high.

In this embodiment, by setting the detection component 40, it can compensate the generated fingerprint image according to the deformation generated when the display panel is pressed, so that the compensated fingerprint image can be imaged more clearly, and the user The pre-stored fingerprint pattern has a high matching degree, thus improving the accuracy and speed of fingerprint unlocking.

The display panel 20 includes a cover plate 22, a touch electrode layer 24, a display function film layer 26 and a supporting substrate 28.

The supporting base 28 serves as a substrate for supporting the cover 22, the touch electrode layer 24, the display function film layer 26, and the supporting base 28. The supporting base 28 is provided with the cover 22 and the touch electrode in sequence. The layer 24, the display function film layer 26 and the supporting substrate 28.

The cover 22 includes a cover glass substrate and an isolation layer and a photocatalyst layer coated on the surface of the cover glass substrate; wherein the photocatalyst layer is attached to the surface of the isolation layer.

The glass substrate of the cover 22 may be a glass substrate with a 2D, 2.5D or 3D structure. 2D structure refers to a pure plane. The glass of this structure is basically flat, and all points on the glass are on the same plane. The 2.5D glass screen means that although the middle area is a flat surface like a general 2D glass screen, the 2.5D glass uses a curved surface on the edge, that is, the edge is curved on the basis of the flat glass. The 3D structural glass refers to glass with a larger curvature of the screen. Mobile electronic devices such as display panels that use 3D glass not only use a curved surface design, but also have a curved 3D screen in the electronic display assembly panel. In this embodiment, the structure of the cover glass substrate is not limited. By coating the surface of the cover glass substrate to form an isolation layer, and then coating the isolation layer again to form a photocatalyst layer, the photocatalyst layer can generate superoxide radicals under light irradiation. When the above cover glass is applied to the surface of mobile electronic devices such as the display panel 20, the superoxide radicals generated by the photocatalyst under light irradiation can effectively remove harmful bacteria and other harmful bacteria on the surface of the display panel 20 and in the grooves of the surrounding decorative ring. The substance solves the current problem that the display panel 20 tends to accumulate bacteria and is difficult to clean after long-term use.

Please refer to FIG. 3, the touch electrode layer 24 includes a plurality of touch electrodes 242, and the plurality of touch electrodes 242 are arranged in a first direction L1 at a predetermined distance. The touch electrodes 242 are arranged in a row along the second direction L2 at a predetermined distance; the first direction L1 and the second direction L2 are perpendicular to each other, and the touch electrodes 242 are arranged in an array.

The display function film layer 26 includes a light emitting layer, a thin film transistor layer and a polarizing layer. The polarizing layer is disposed on a side surface of the light-emitting layer facing the touch electrode layer 24. The connection between the light-emitting layer and the polarizing layer may adopt optical glue fixed connection, embedded press-fit fixed connection, or layered film plating.

The light-emitting layer is used as a source of emitted light to generate the emitted light. In this embodiment, the light-emitting layer is applied to the fingerprint recognition module 60 of the display device 100, that is, the fingerprint recognition module 60 can receive The reflected light of the generated fingerprint image.

The light-emitting layer includes an organic functional layer, a cathode and an anode. Wherein, the organic functional layer is laminated and disposed between the cathode and the anode to generate the emitted light. Wherein, the organic functional layer is prepared by mixing a certain proportion of organic light-emitting materials with a host material. When an external voltage is applied, the holes of the anode migrate to the organic functional layer, the electrons of the cathode migrate to the organic functional layer, and the electrons and holes meet in the organic functional layer to form electrons- For hole pairs, electrons transition from an excited state to a ground state, releasing energy in the form of radiated photons, thereby generating electroluminescence. The organic light-emitting materials can be organic small molecule materials or organic polymer materials to achieve electroluminescence.

It is understandable that the light source provided by the light-emitting layer can also be applied to other optical technology fields, so as to make full use of the emitted light source. For example, the light emitted by the light-emitting layer can be used as a working light source in optical photosensitive recognition, or the light emitted by the light-emitting layer can be used for pixel display in image display, that is, the light-emitting layer can be used for display on a display screen. , Or optical recognition under the display.

The thin film transistor layer is disposed on a side surface of the light emitting layer for driving the light emitting layer. The layer structure of the thin film transistor and how to scan and drive the light-emitting layer to generate the emitted light are existing technical means and will not be repeated here.

The polarizing layer is a circular polarizing layer, which is used to convert the emission optics generated by the light-emitting layer from unpolarized light into polarized light.

Please continue to refer to FIG. 1, the carrier substrate 28 includes a first flexible substrate 282, an adhesive layer 284, and a second flexible substrate 286. The adhesive layer is disposed on the first flexible substrate 282 and the Between the second flexible substrate 286.

The first flexible substrate 282 and the second flexible substrate 286 are both polyimide film materials, which are made of pyromellitic dianhydride (PMDA) and diaminodiphenyl ether (DDE). It is formed by polycondensation and casting into a film in a strong polar solvent and then imidization. The first flexible substrate 282 and the second flexible substrate 286 are adhered together through the adhesive layer 284 to form the flexible substrate.

In some embodiments, the first flexible substrate 282 and the second flexible substrate 286 may also use other types of flexible materials as required, for example, thermoplastic semi-crystalline polymers, such as PET, PEN, and PEEK. , It has good transparency, low thermal expansion coefficient, good water and oxygen resistance, and the price is relatively cheap; non-crystalline thermoplastic polymers, such as PC, PES, which are made by solvent injection or melt injection molding, have relatively Good optical transparency and high glass transition temperature. When the thickness of PC or PES film reaches 0.1mm, the transmittance in the visible light range can reach over 85%.

The fingerprint recognition module 60 includes a fixed layer 64, an optical sensor assembly 66 and a base shell 68.

The fixing layer 64 is arranged on the side of the supporting substrate 28 away from the display function film layer 26; the number of the fixing layer 64 can be set to one, two or more than two. When there are one fixing layer 64, the fixing layer 64 is disposed at one end of the supporting substrate 28 away from the side surface of the display function film layer 26; when there are two fixing layers 64, the two fixing layers The fixing layers 64 are respectively disposed on opposite ends of the side surface of the supporting substrate 28 away from the display function film layer 26. When the number of the fixed layers 64 is more than two, each of the fixed layers 64 is arranged on the side of the supporting substrate 28 away from the display function film layer 26 at a predetermined distance.

The optical sensor assembly 66 is connected to the fixing layer 64. For example, when there are two fixing layers 64, one end of the optical sensor assembly 66 is connected to one of the fixing layers 64, and the other end of the optical sensor assembly 66 is connected to the other fixing layer 64.

The base shell 68 serves as a substrate for carrying the fixing layer 64 and the optical sensor assembly 66. The fixed layer 64 and the optical sensor assembly 66 are sequentially arranged on the base shell 68. In this embodiment, the two ends of the base shell 68 are respectively connected to the side surfaces of the two fixing layers 64.

At the same time, the optical sensor assembly 66 is partially received in the base housing 68; in this embodiment, a receiving cavity is opened on one side of the base housing 68, and part of the optical sensor assembly 66 is received in the receiving cavity.

The fixing layer 64 includes an optical adhesive layer 642 and a supporting layer 644. The optical adhesive layer 642 is arranged on the side of the supporting substrate 28 away from the display function film layer 26; the supporting layer 644 is arranged on the optical glue The layer is away from the side surface of the supporting base 28, and the base shell 68 is connected to the supporting layer 644.

The optical adhesive layer 642 includes a first optical adhesive layer and a second optical adhesive layer, and the first optical adhesive layer and the second optical adhesive layer are respectively disposed on the carrier substrate 28 away from the display function film layer 26 The optical adhesive layer 642 is an OCA adhesive layer (Optically Clear Adhesive) used to bond the carrier substrate 28 and the supporting layer 644 special adhesive. The OCA adhesive layer has the characteristics of colorless and transparent, light transmittance above 90%, good bonding strength, can be cured at room temperature or medium temperature, and has the characteristics of small curing shrinkage.

The supporting layer 644 includes a first supporting layer and a second supporting layer, the first supporting layer is facing the first optical adhesive layer, and the first supporting layer is glued to the first optical adhesive layer , The second supporting layer is glued to the second optical adhesive layer. The supporting layer 644 is used to support and protect the optical sensor assembly 66. The support layer 644 may be formed of various materials. For example, when the supporting layer 644 is used in a flexible application such as a flexible display device, the flexible substrate may be formed of a flexible insulating material. Examples of flexible insulating materials may include polyimide (PI), polyetherimide (PEI), polyethylene terephthalate (PES), polycarbonate (PC), polystyrene (PS) , Styrene-acrylonitrile copolymer, and silicone acrylic resin.

Since the optical adhesive layer 642 and the supporting layer 644 both have a predetermined thickness, and the optical adhesive layer 642 and the supporting layer 644 are both disposed on the side of the carrier substrate 28 away from the display function film layer 26 Therefore, a side surface of the supporting substrate 28, the optical adhesive layer 642 and the supporting layer 644 form a first gap 65, and the other part of the optical sensor assembly 66 is received in the first gap 65.

The optical sensor assembly 66 includes a fingerprint sensor 662 and a transmission layer 664, the transmission layer 664 is disposed on one side of the fingerprint sensor 662, and the transmission layer 664 faces the fingerprint sensor 662.

The transmissive layer 664 is formed of light transmissive materials such as transparent glass. The transmissive layer can be penetrated by visible light, infrared light, or ultraviolet light, and the thickness of the transmissive layer can be between 1 micron and 800 microns. . When the display panel is pressed, the emitted light is blocked by the pressing object and the reflected light reflected back into the display panel 20 is transmitted through the transmission layer 664 to be received by the fingerprint sensor 662, and the fingerprint sensor 662 According to the received reflected light, the fingerprint image is generated. The object distance Lo is the actual vertical distance between the pressing object 10 and the fingerprint sensor 662 in the fingerprint identification module 60.

The transmission layer 664 is accommodated in the first gap 65, one end of the transmission layer 664 is connected to the first support layer, and the other end of the transmission layer 664 is connected to the second support layer. And the thickness of the first supporting layer and the second supporting layer are equal to the thickness of the transmission layer 664.

A housing cavity is opened on a side surface of the housing facing the first gap, and the fingerprint sensor 662 is accommodated in the housing cavity. The fingerprint sensor 662 can generate a fingerprint image according to the received reflected light.

The detection component 40 is used to generate a compensation signal according to the deformation of the display panel when the display panel is pressed. The detection component 40 includes a pressure detection layer 42 and an insulating layer 44. The touch electrode layer 24 of the display panel 20 is disposed on one side of the insulating layer 44, and the pressure detection layer 42 is disposed on the other side of the insulating layer 44 away from the touch electrode layer 24, and Let the plane where the pressure detection layer 42 is located is a projection plane, and the orthographic projection of the touch electrode layer 24 on the projection plane can be projected on the pressure detection layer 42, so that the detection component 40 can detect The deformation produced when any position of the display panel is pressed.

The pressure detecting layer 42, the insulating layer 44 and the touch electrode layer 24 together form a capacitor structure.

In this embodiment, when the display panel is pressed, the capacitance between the touch electrode layer 24 corresponding to the pressed position and the pressure detection layer 42 is greater than the touch electrode layer 24 corresponding to the unpressed position and the pressure The capacitance between the layers 42 is detected. The detection component 40 obtains the deformation according to the difference between the capacitance value at the pressed position and the unpressed capacitance value, and then generates a corresponding compensation signal according to the deformation, the fingerprint identification The module 60 compensates and corrects the generated fingerprint image according to the compensation signal, so that the compensated fingerprint image is more clear and has a high degree of matching with the user's pre-stored fingerprint image, thus improving the accuracy and speed of fingerprint unlocking.

The pressure detection layer 42 may be a conductive pattern formed by using a copper foil layer of a flexible circuit board, or a conductive pattern may be formed on a PET (polyethylene terephthalate) substrate by silk-screening silver paste.

The pressure detection layer 42 can also serve as a shielding layer, so that the display device 100 has antistatic and anti-electromagnetic interference capabilities.

The insulating layer 44 is made of a deformable insulating material. In some embodiments, the insulating layer is an air layer or a vacuum layer, and the air layer or the vacuum layer is formed between the touch electrode layer 24 and the pressure detection layer. The cost of the air layer is low, and the preparation process is simple, which is beneficial to reducing the cost of the display device 100. The vacuum layer has good insulation effect, which is beneficial to improve the sensitivity and accuracy of the detection capacitor.

Therefore, only a small amount of pressure needs to be applied to the display panel to deform the touch electrode layer 24 and the pressure detection layer 42, and the distance between the touch electrode layer 24 and the pressure detection layer 42 changes. , Thereby causing the size of the detection capacitance to change. Therefore, the detection component 40 can detect the value of the capacitance in a large range, in particular, it can improve the ability to detect small capacitance changes, and the detection action is fast and accurate.

4, the display device 100a provided by some embodiments of the present application is basically the same as the display device 100 shown in FIG. 1, except that the detection component 40a of the display device 100a is disposed on the carrier substrate 28 and the Between the optical sensor assembly 66. The detection component 40 includes an electrode layer 42a and a distance detection layer 44a. The electrode layer 42a is laminated on the side of the carrier substrate 28 facing the optical sensor component 66; the distance detection layer 44a is disposed on the optical sensor component 66 and opposite to the electrode layer 42a, the optical sensor assembly 66 is electrically connected to the electrode layer 42a and the distance detection layer 44a, wherein the electrode layer 42a, the first gap 65 and the The distance detection layer 44a constitutes a capacitance structure.

The distance detection layer 44a may be a conductive pattern formed by using a copper foil layer of a flexible circuit board, or a conductive pattern may be formed by silk-printing silver paste on a PET (polyethylene terephthalate) substrate.

The distance detection layer 44a can also serve as a shielding layer, so that the display device 100a has antistatic and anti-electromagnetic interference capabilities.

Between the electrode layer 42a and the distance detecting layer 44a is the first gap 65, the first gap 65 is an air layer or a vacuum layer, and the air layer or the vacuum layer is formed between the electrode layer 42a and the electrode layer 42a. Distance between detection layers 44a. The cost of the air layer is low, and the preparation process is simple, which is beneficial to reducing the cost of the display device 100a. The vacuum layer has good insulation effect, which is beneficial to improve the sensitivity and accuracy of the detection capacitor.

In this embodiment, when the display panel is pressed, the capacitance between the electrode layer 42a and the distance detection layer 44a corresponding to the pressed position is greater than the capacitance between the electrode layer 42a and the distance detection layer 44a corresponding to the unpressed position. The detection component 40a obtains the deformation according to the difference between the capacitance value at the pressed position and the unpressed capacitance value, and then generates a corresponding compensation signal according to the deformation. The fingerprint identification module 60 The compensation signal compensates and corrects the generated fingerprint image, so that the compensated fingerprint image is more clearly imaged, and has a high matching degree with the user's pre-stored fingerprint image, thus improving the accuracy and speed of fingerprint unlocking.

At the same time, only a small amount of pressure needs to be applied to the display panel to deform the electrode layer 42a and the distance detecting layer 44a, and the distance between the electrode layer 42a and the distance detecting layer 44a will change, thereby causing the The size of the detection capacitance changes. Therefore, the detection component 40a can detect the capacitance of the capacitance in a wide range, in particular, it can improve the detection ability of small capacitance changes, and the detection action is fast and accurate.

Referring to FIG. 5, the display device 100b provided by some embodiments of the present application is basically the same as the display device 100 shown in FIG. 1, except that the detection component 40b of the display device 100b includes a piezoelectric material layer 46b and a first conductive material layer 46b. Layer 42b and second conductive layer 44b; the first conductive layer 42b and the second conductive layer 44b are respectively disposed on two opposite sides of the piezoelectric material layer 46b, and the fingerprint recognition module 60 is connected to the The first conductive layer 42b and the second conductive layer 44b are electrically connected. The first conductive layer 42b is disposed on the side of the first flexible substrate 282 facing the adhesion layer, and the second conductive layer 44b is disposed on the adhesion layer facing the first flexible substrate 282; or, the first conductive layer 42b is disposed on the side of the adhesive layer facing the second flexible substrate 286, and the second conductive layer 44b is disposed on the second flexible substrate 286 faces the side of the adhesion layer. In some embodiments, the detection component 40b is a piezoelectric film sensor.

In this embodiment, when the display panel is pressed, the voltage of the piezoelectric material layer 46b corresponding to the pressed position is greater than the voltage of the piezoelectric material layer 46b corresponding to the unpressed position, and the detection component 40b is based on the voltage at the pressed position. The difference between the value and the unpressed voltage value is used to obtain the deformation, and then generate a corresponding compensation signal according to the deformation. The fingerprint recognition module 60 compensates and corrects the generated fingerprint image according to the compensation signal, so that The compensated fingerprint image is more clear, and has a high matching degree with the user's pre-stored fingerprint image, thus improving the accuracy and speed of fingerprint unlocking.

At the same time, only a small amount of pressure needs to be applied to the display panel to deform the piezoelectric material layer 46b corresponding to the pressing position, causing the voltage value of the piezoelectric material layer 46b corresponding to the pressing position to change. Therefore, the The detection component 40b can detect the value of the voltage in a wide range, in particular, it can improve the detection ability of small voltage value changes, and the detection action is fast and accurate.

Another embodiment of the present application also provides an electronic device. The electronic device includes but is not limited to a mobile phone, a notebook, a tablet computer, a POS machine, a vehicle-mounted computer, a camera, and the like.

The electronic device includes the

display device

100, 100a or 100b, a processor, a transceiver, a memory and a bus in any of the above embodiments.

Wherein, the

display device

100, 100a or 100b is connected to a bus, so as to be connected to other parts such as a processor through the bus. The display area of the

display device

100, 100a, or 100b may provide an input interface for the operator, so that the operator can select a deployment control item through the input interface.

Among them, the transceiver is used to send and receive data with external devices. The number of processors can be one or more. In some embodiments of the present application, the processor, the memory, and the transceiver may be connected by a bus or other methods.

Among them, the program code is stored in the memory. The processor is used to call the program code stored in the memory to perform the following operations:

Wherein, the processor is used to determine the switching setting operation of multiple apps in the electronic device, change the drawing according to the change message, and update the drawing.

It should be noted that the processor here may be one processing element or a collective term for multiple processing elements. For example, the processing element may be a central processing unit (CPU), a specific integrated circuit (Application Specific Integrated Circuit, ASIC), or one or more integrated circuits configured to implement the embodiments of the present application For example, one or more microprocessors (digital signal processor, DSP), or one or more field programmable gate arrays (Field Programmable Gate Array, FPGA).

Among them, the memory may be a storage device, or a collective name of multiple storage elements, and is used to store executable program code or parameters, data, etc., required for the operation of the application program running device. And the memory may include random access memory (RAM) or non-volatile memory (non-volatile memory), such as magnetic disk memory, flash memory (Flash), and so on.

The bus may be an Industry Standard Architecture (ISA) bus, Peripheral Component (PCI) bus, or Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into address bus, data bus, control bus, etc.

Compared with the prior art, the electronic device of the present application provides a

display device

100, 100a, or 100b, and the

detection component

40, 40a, or 40b is provided to enable it to respond to the deformation generated when the display panel is pressed. , The generated fingerprint image is compensated to make the compensated fingerprint image more clear, and the matching degree with the user's pre-stored fingerprint image is high, thus improving the accuracy and speed of fingerprint unlocking.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; under the idea of this application, the above embodiments or the technical features in different embodiments can also be combined. The steps can be implemented in any order, and there are many other variations in different aspects of the application as described above. For the sake of brevity, they are not provided in the details; although the application has been described in detail with reference to the foregoing embodiments, it is common in the art The technical personnel should understand that: they can still modify the technical solutions described in the foregoing embodiments, or equivalently replace some of the technical features; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the implementations of this application Examples of the scope of technical solutions.

Claims

A display device, characterized by comprising:

The display panel is configured to emit light, and when the display panel is pressed by a pressing object, the emitted light is blocked by the pressing object and reflected back into the display panel;

The detection component is used to generate a compensation signal according to the deformation of the display panel when the display panel is pressed;

The fingerprint recognition module is connected to the detection component and compensates the generated fingerprint image according to the compensation signal; the shape of the display panel becomes the distance between the pressed object and the fingerprint recognition module and the unpressed The difference in the distance between the display panel and the fingerprint identification module at
The display device according to claim 1, wherein:

The display panel includes a touch electrode layer;

The detection component includes a pressure detection layer and an insulating layer, the touch electrode layer is arranged on one side of the insulating layer, and the pressure detection layer is arranged on the other side of the insulating layer away from the touch electrode layer, Wherein, the pressure detection layer, the insulating layer, and the touch electrode layer jointly constitute a capacitor structure;

When the display panel is pressed, the capacitance between the touch electrode layer corresponding to the pressed position and the pressure detection layer is greater than the capacitance between the touch electrode layer corresponding to the unpressed position and the pressure detection layer.
The display device according to claim 2, wherein:

Let the plane on which the pressure detection layer is located is a projection plane, and any orthographic projection of the touch electrode layer on the projection plane can be projected on the pressure detection layer.
4. The display device of claim 2, wherein the insulating layer is made of elastic material.
The display device according to claim 1, wherein:

The display panel further includes a supporting substrate and a display functional film layer, the display functional film layer being laminated on the supporting substrate and used for emitting the light;

The fingerprint recognition module includes a fixed layer and an optical sensor component, the fixed layer is disposed on a side of the carrier substrate away from the display function film layer, and the optical sensor component is connected to the fixed layer.
5. The display device of claim 5, wherein the detection component is disposed in the supporting substrate.
7. The display device of claim 6, wherein the supporting substrate comprises a first flexible substrate, an adhesion layer, and a second flexible substrate, and the adhesion layer is disposed on the first flexible substrate. Between the second flexible substrate and the second flexible substrate, the detection component is disposed between the first flexible substrate and the adhesion layer or between the second flexible substrate and the adhesion layer.
The display device according to claim 7, wherein:

The detection component includes a piezoelectric material layer, a first conductive layer, and a second conductive layer;

The first conductive layer and the second conductive layer are respectively disposed on opposite sides of the piezoelectric material layer, and the fingerprint identification module is electrically connected to the first conductive layer and the second conductive layer, respectively ；

When the display panel is pressed, the voltage of the piezoelectric material layer corresponding to the pressed position is greater than the voltage of the piezoelectric material layer corresponding to the unpressed position.
The display device according to claim 8, wherein:

The first conductive layer is disposed on the side of the first flexible substrate facing the adhesion layer, and the second conductive layer is disposed on the side of the adhesion layer facing the first flexible substrate;

Alternatively, the first conductive layer is disposed on the side of the adhesion layer facing the second flexible substrate, and the second conductive layer is disposed on the side of the second flexible substrate facing the adhesion layer. side.
8. The display device according to claim 7, wherein the detection component is a piezoelectric film sensor.
The display device according to claim 5, wherein the number of the fixing layers is two, and the two fixing layers are respectively disposed on two opposite sides of the supporting substrate away from the side surface of the display function film layer, The optical sensor assembly is arranged between the two fixing layers.
11. The display device of claim 11, wherein the detection component is disposed between the carrier substrate and the optical sensor component.
The display device according to claim 12, wherein the detection component comprises:

An electrode layer, the electrode layer being laminated on the side of the carrier substrate facing the optical sensor assembly;

The distance detection layer is disposed on the optical sensor assembly and is opposite to the electrode layer, and the optical sensor assembly is electrically connected to the electrode layer and the distance detection layer, respectively, wherein the electrode The layer and the distance detection layer constitute a capacitance structure.
The display device according to claim 12, wherein:

The two fixing layers are provided with a preset thickness;

The two fixing layers, the optical sensor assembly and the supporting substrate jointly form a first gap;

The electrode layer, the first gap, and the distance detection layer together form a capacitor structure.
The display device of claim 13, wherein the optical sensor assembly comprises:

A transmission layer, both ends of the transmission layer are respectively connected to the two fixing layers, and the distance detection layer is laminated on the side of the transmission layer facing the electrode layer;

The fingerprint sensor is arranged on the side of the transmission layer away from the electrode layer.
14. The display device of claim 14, wherein the optical sensor assembly further comprises a base housing for accommodating the fingerprint sensor, and two ends of the base housing are respectively connected to the two fixing layers.
15. The display device of claim 15, wherein the fixed layer comprises:

The optical adhesive layer is arranged on the side of the carrier substrate away from the display function film layer;

The supporting layer is arranged on the side of the optical adhesive layer away from the supporting substrate, and the base shell is connected to the supporting layer.
An electronic device, characterized by comprising: a display device, a processor, a transceiver, a memory, and a bus according to any one of claims 1-17;

The display device is connected to the bus to connect to the processor, the transceiver and the memory through the bus.