CN110580473A - Fingerprint identification components, display components, and electronic devices - Google Patents

Abstract

The present application discloses a fingerprint identification component, a display component, and an electronic device for flexible special-shaped display and flexible folding display, wherein, a fingerprint identification component includes: a flexible photosensitive layer; the flexible photosensitive layer includes a flexible substrate, A transistor array arranged on the flexible substrate, and an array of photosensitive devices connected to the transistor; a flexible collimation layer arranged on the flexible photosensitive layer; the flexible collimation layer is used to collimate the light light signal.

Description

Fingerprint identification components, display components, and electronic devices

technical field

The present application relates to the field of fingerprint identification, and in particular to a fingerprint identification component, a display component, and an electronic device.

Background technique

At present, the optical fingerprint under the screen is applied under the OLED display, mainly using a single-point fingerprint recognition device imaged by a camera, which is suitable for fingerprint recognition on a glass-based hard screen. The main structure of the under-screen fingerprint camera imaging fingerprint recognition device includes: cover glass, OLED display and a photosensitive device composed of camera CMOS.

Among them, the camera imaging fingerprint recognition is applied under the OLED screen. When the light emitted by the OLED screen hits the interface where the fingerprint touches, the position of the ridge will be diffusely reflected and the brightness will decrease, and the position of the valley will increase the brightness due to specular reflection, thus reflecting Back to the sensor, fingerprint recognition is realized by imaging different brightness of valleys and ridges. However, using the imaging technology of camera CMOS, only single-point fingerprint recognition can be realized, and multi-point and large-area recognition cannot be realized.

In the era of artificial intelligence, users have more and more needs for special displays. At present, multi-directional special-shaped, light and thin, and foldable flexible OLED displays are developing. For flexible special-shaped screens and flexible foldable OLED screens, the use of camera CMOS imaging technology The substrate of the photosensitive device of the fingerprint identification device is usually a silicon substrate, which also cannot meet the requirements of foldable flexibility.

Contents of the invention

In view of the above deficiencies, an object of the present application is to provide a fingerprint identification component, a display component, and an electronic device for flexible shaped displays and flexible foldable displays.

Another object of the present application is to provide a fingerprint recognition component, a display component, and an electronic device that can satisfy large-area multi-point fingerprint recognition.

In order to achieve at least one of the above objectives, the application adopts the following technical solutions:

A fingerprint recognition component, comprising:

A flexible photosensitive layer; the flexible photosensitive layer includes a flexible substrate, a transistor array disposed on the flexible substrate, and an array of photosensitive devices connected to the transistors;

A flexible collimation layer arranged on the flexible photosensitive layer; the flexible collimation layer is used to make the light form a collimated light signal.

As a preferred embodiment, the flexible alignment layer includes a light-removing portion disposed on the photosensitive layer, and a plurality of microlenses disposed on the light-removing portion; The photosensitive layer is covered; the light-removing part is provided with a plurality of light-transmitting microholes; the light energy focused by the microlens passes through the corresponding light-transmitting microholes and is received by the photosensitive device.

As a preferred implementation manner, the material of the flexible substrate includes polyimide or TAC.

As a preferred implementation manner, the fingerprint recognition component further includes: an infrared filter film, and the infrared filter film is attached to the surface of the flexible alignment layer away from the flexible photosensitive layer through optical glue.

As a preferred implementation manner, the fingerprint recognition component further includes: an infrared filter film; the infrared filter film is arranged between the flexible alignment layer and the flexible photosensitive layer.

As a preferred embodiment, the infrared filter film is bonded between the flexible collimation layer and the flexible photosensitive layer by optical glue, or the infrared filter film is arranged on the The surface of the flexible photosensitive layer.

As a preferred implementation manner, the light-transmitting microholes are provided in one-to-one correspondence with the microlenses.

As a preferred implementation manner, the microlens is made of transparent resin material; the light-removing part is formed by metal openings or vinyl openings.

As a preferred implementation manner, along a direction perpendicular to the substrate, the microlenses are aligned with the corresponding light-transmitting microholes.

As a preferred implementation manner, along a direction perpendicular to the substrate, the distance between the microlens and the corresponding light-transmitting microhole matches the focal length of the microhole.

As a preferred embodiment, the photosensitive device array includes a plurality of photosensitive devices; the transistor array includes a plurality of thin film transistors; the photosensitive devices in the photosensitive device array are connected to the transistor array A plurality of thin film transistors are provided in one-to-one correspondence.

A display assembly comprising:

outer cover;

a flexible OLED display located inside the outer cover;

The fingerprint recognition component as described in any one of the above implementation manners, the fingerprint recognition component is fixed inside the display screen.

An electronic device, comprising: the display component as described in the above implementation manners, or the fingerprint recognition component as described in any one of the above implementation manners.

Beneficial effect:

The fingerprint identification component provided in this embodiment is provided with a flexible substrate, a flexible photosensitive layer, and a flexible alignment layer to obtain a flexible optical fingerprint identification component, which can be used for flexible special-shaped displays and flexible folding displays.

With reference to the following description and accompanying drawings, there are disclosed in detail specific embodiments of the invention, indicating the manner in which the principles of the invention may be employed. It should be understood that embodiments of the invention are not limited thereby in scope.

Features described and/or illustrated with respect to one embodiment can be used in the same or similar manner in one or more other embodiments, in combination with, or instead of features in other embodiments .

It should be emphasized that the term "comprising/comprising" when used herein refers to the presence of a feature, integer, step or component, but does not exclude the presence or addition of one or more other features, integers, steps or components.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings on the premise of not paying creative efforts.

FIG. 1 is a schematic structural diagram of a display component according to an embodiment of the present application;

Fig. 2 is a connection circuit diagram of the thin film transistor and the photosensitive device of Fig. 1;

Fig. 3 is a schematic diagram of the alignment layer of Fig. 1;

FIG. 4 is a schematic structural diagram of a display component according to another embodiment of the present application.

Detailed ways

In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or there may be another element in between. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or it may be present intervening with the other element. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of illustration only and are not intended to represent the only embodiments.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terminology used herein in the description of the present invention is only for the purpose of describing specific embodiments, and is not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Please refer to FIG. 1 to FIG. 4 , an embodiment of the present application provides a fingerprint identification component, which can be used in but not limited to scenarios such as off-screen fingerprint unlocking, user identity verification, and access control authorization acquisition. More specifically, the fingerprint identification component for off-screen fingerprints in the embodiment of the present application can be applied to electronic devices including but not limited to mobile smartphones, tablet electronic devices, computers, GPS navigators, personal digital assistants, smart wearable devices, etc. in the device.

In order to realize the basic functions of the electronic device, the electronic device mentioned in the embodiments of the present application may further include other necessary modules or components. Taking a mobile smart phone as an example, it may also include a communication module, a battery, and the like.

It should be noted that other necessary modules or components included in the electronic equipment may be of any suitable existing configuration. In order to clearly and concisely illustrate the technical solutions provided by the present application, the above-mentioned parts will not be described in detail here, and the accompanying drawings in the description have also been simplified accordingly. However, it should be understood that the application is not limited in scope thereby.

Wherein, the electronic device may be configured with a display screen. The display screen may be a self-luminous display screen using self-luminous units as display pixels, such as an OLED display screen or an LED display screen. Therefore, the display screen can be used as an excitation light source to emit excitation light to a target organism (such as a user's finger), and the excitation light is reflected by the target organism to form a target light signal.

Certainly, the display screen may also be an LCD display screen or other passive light-emitting display screens, which is not limited in this embodiment of the present application. When the display screen is a passive light-emitting display screen, the electronic device can be equipped with an additional light source located under the display screen, and the additional light source is used as an excitation light source to emit excitation light to the target organism, and the excitation light is reflected by the target organism to form a target optical signal .

See Figures 1 through 3. An embodiment of the present application provides a fingerprint recognition component 100, which is an optical fingerprint recognition component 100, which images an optical signal carrying fingerprint information and converts it into an electrical signal that can be processed, and then Realize fingerprint recognition.

The fingerprint recognition component 100 can be applied to under-screen fingerprint imaging for fingerprint recognition. Specifically, the fingerprint identification component 100 includes: a photosensitive layer 50 , and an alignment layer 3 disposed on the photosensitive layer 50 . Wherein, the photosensitive layer 50 includes a substrate 1 , a transistor array 2 disposed on the substrate 1 , and a photosensitive device array 6 connected to the transistors. The collimation layer 3 is used to make the light form a collimated light signal. The photosensitive layer 50 can convert the collimated light signal into an electrical signal.

In this embodiment, the alignment layer 3 can be a flexible alignment layer 3, and the photosensitive layer 50 can be a flexible photosensitive layer 50 provided with a flexible substrate 1. The fingerprint recognition component 100 provided in this embodiment is provided with a flexible photosensitive layer The layer 50 and the flexible alignment layer 3 further obtain a flexible optical fingerprint identification component 100, which can be used for flexible special-shaped display and flexible folding display.

In this embodiment, the photosensitive layer 50 can be manufactured using TFT-LCD technology to form a flexible photosensitive layer 50, and cooperate with the flexible alignment layer 3 to form a flexible fingerprint identification component 100, which can be used for flexible special-shaped display and flexible folding. show. Among them, the transistor array 2 and the photosensitive device array 6 of the photosensitive layer 50 can be manufactured in a large area, so as to cooperate with the large-area substrate 1 to realize multi-point and large-area fingerprint recognition. Wherein, the flexible substrate 1 is a non-silicon substrate, not a glass substrate. Specifically, the material of the flexible substrate 1 includes polyimide or TAC (tricarboxylic acid cycle,). The flexible substrate 1 can also be other polymer materials.

The photosensitive device array 6 includes a plurality of photosensitive devices 60 . A plurality of photosensitive devices 60 are arranged in an array to form a photosensitive device array 6 . The transistor array 2 includes a plurality of transistors 20 . The transistor 20 is a thin film transistor (Thin Film Transistor, TFT). A plurality of thin film transistors 20 are arranged in an array to form a transistor array 2 . The plurality of photosensitive devices 60 in the photosensitive device array 6 are set in one-to-one correspondence with the plurality of transistors 20 in the transistor array 2 .

The transistor array 2 includes a plurality of thin film transistors 20 arranged in an array. Each transistor 20 in the transistor array 2 realizes switch control of each photosensitive device 60 in the photosensitive device array 6 . Wherein, the photosensitive device 60 transforms the light signal into an electrical signal. The processing circuit connected to the photosensitive device array 6 and the transistor array 2 is arranged on the non-photosensitive device 60 of the flexible substrate 1 or is independently other components. The photosensitive device 60 may be a photodiode (PD, Photo-Diode). Specifically, the photodiode may include an organic photodiode or an inorganic photodiode.

As shown in FIG. 2 , each thin film transistor 20 (TFT) forms a pixel with a corresponding electrically connected photodiode, the gate of the thin film transistor 20 is connected with a gate control circuit (GATE IC), and the drain is connected with the photodiode , the source is connected to the control circuit (RO IC).

The flexible photosensitive layer 50 provided in this embodiment can avoid the use of an optical fiber collimator panel as a collimator, avoiding the inability to achieve bending. Moreover, the flexible substrate provided by this embodiment, instead of using a glass-based substrate, can also avoid inability to realize bending, thereby realizing fingerprint recognition for flexible special-shaped screens and flexible folding screens. In addition, the photosensitive layer 50 manufactured by TFT-LCD technology can be manufactured in a large area, so it can realize multi-point and large-area fingerprint recognition.

The collimating layer 3 is a functional layer for realizing light collimation, a collimating functional layer composed of a plurality of microlenses 31 and/or an optical fingerprint functional layer formed by light through holes, or an optical collimating functional layer realized in other ways. The alignment layer 3 is a flexible structure. The alignment layer 3 is bendable. Specifically, the microlens 31 is made of transparent resin material.

In this embodiment, the collimating layer 3 is used to change the propagation direction of the light so that it converges to the photosensitive device 60 of the photosensitive device array 6 of the photosensitive layer 50 . In order to achieve a flexible structure for the collimation layer 3, in a specific embodiment, the collimation layer 3 includes a light-removing portion 30 disposed on the photosensitive layer 50, and a light-removing portion 30 disposed on the light-reducing portion 30. A plurality of microlenses 31. The light-removing portion 30 covers the photosensitive layer 50 . The light-removing portion 30 is provided with a plurality of light-transmitting micro-holes 33 ; the light focused by the micro-lens 31 passes through the corresponding light-transmitting micro-holes 33 and is received by the photosensitive device 60 . The light-transmitting microholes 33 are provided in one-to-one correspondence with the microlenses 31 . The light-removing part 30 can be made of metal, and the light-transmitting microholes 33 are formed by opening holes, or the light-removing part 30 can be made of black rubber, and the light-transmitting microholes 33 are formed by opening holes.

The optical signal focused by the microlens 31 needs to pass through the light-transmitting microhole 33 on the light-removing part 30 below to reach the light-sensing device 60 , and non-target light signals will be blocked by the light-removing part 30 . In order to reduce the light intensity of the light signal received by the photosensitive device 60 and improve the signal-to-noise ratio in the case of a short object distance, the light-removing portion 30 covers the photosensitive layer 50 . The material of the light-removing portion 30 is an opaque material (such as metal, vinyl), so as to prevent non-target light signals from passing through the light-reducing portion 30 .

The fingerprint recognition component of the present embodiment adopts the microlens 31 of small focal length, thus can shorten object distance, and, be provided with a plurality of light-transmitting microholes 33 on the light-removing part 30, the light-transmitting microholes 33 are arranged corresponding to the microlenses 31 , the light-transmitting microhole 33 allows the light signal focused by the microlens 31 to pass through, and the non-target light signal will be blocked by the area of the light-removing part 30 that is not provided with the light-transmitting microhole 33, so as to avoid the passing of the non-target light signal and reduce the non-target light signal. The interference and light intensity of the target optical signal ensure that the optical signal received by the light-sensing area can be accurately and successfully identified.

The (optical) fingerprint recognition component of the embodiment of the present application can convert optical signals into electrical signals. When the fingerprint recognition component is arranged below the display screen, it is used to receive the target signal light reflected from the target organism above the display screen. And, the target signal light can be converted into an electric signal to generate a fingerprint image. The fingerprint identification component can further provide the fingerprint image to a processing circuit (image processor) for image processing to obtain a fingerprint signal, and perform fingerprint identification on the fingerprint signal through an algorithm.

The fingerprint identification component does not need to be equipped with a lens component, and uses a plurality of microlenses 31 with smaller focal lengths to cooperate with the light-transmitting microholes 33 to realize optical signal processing, shorten the imaging object distance, and improve the signal of the optical signal received by the optical sensing device 60. Noise ratio, realize the processing and identification of fingerprint optical signal. Of course, the present application does not exclude scenarios that are used in conjunction with the lens assembly. In the case that the object distance needs to be shortened, the fingerprint recognition component does not need to be equipped with a lens component.

The focal length of the microlens 31 is relatively small, so that the object distance can be shortened. Cooperating with it, the light-removing part 30 is provided with a plurality of light-transmitting microholes 33, and the light-transmitting microholes 33 are arranged correspondingly to the microlenses 31. The hole 33 allows the optical signal focused by the microlens 31 to pass through, while other non-target optical signals will be blocked by the area (spacer 32) where the light-removing part 30 is not provided with the light-transmitting micro-hole 33, so as to avoid the passage of the non-target optical signal. Reduce the interference and light intensity of non-target optical signals to ensure that the optical signals received by the light-sensing area can be accurately and successfully identified.

The light removing part 30 is disposed on the flexible photosensitive layer 50 and supported by the flexible photosensitive layer 50 . It should be noted that the light-removing part 30 described in this embodiment is disposed on the flexible photosensitive layer 50, and it is not limited whether there are other material layers between the flexible photosensitive layer 50 and the light-removing part 30, that is, the light-removing part 30 may be directly disposed on the surface of the flexible photosensitive layer 50, or indirectly disposed on the flexible photosensitive layer 50, which is not limited in this application. It can be understood that the flexible substrate 1 of the flexible photosensitive layer 50 provides support for the entire fingerprint identification component, and the light-removing portion 30 is supported above the flexible photosensitive layer 50 .

In the light-removing part 30 , the light-transmitting microholes 33 pass through the light-removing part 30 up and down, and are used for the light focused by the microlens 31 to pass through. A plurality of light-transmitting microholes 33 are arranged at intervals, and a spacer 32 (also referred to as a blocking portion) is arranged between adjacent light-transmitting microholes 33. Light) will irradiate on the spacer 32, and be reflected or absorbed by the spacer 32, forming a barrier to interfering optical signals.

The microlens 31 focuses the received light signal, and reaches the photosensitive device 60 through the light-transmitting microhole 33 on the light-removing portion 30 . A plurality of microlenses 31 can be arranged in an array on a flat surface to form a microlens array, and are arranged corresponding to a plurality of light-transmitting microholes 33 .

In order to match the light-transmitting microholes 33 with the microlenses 31 and improve the signal-to-noise ratio, the microlenses 31 and the corresponding light-transmitting microholes 33 are aligned along a direction perpendicular to the flexible substrate 1 . That is, along the direction F perpendicular to the substrate 1 , the light-transmitting microholes 33 are covered by the corresponding microlenses 31 .

In this embodiment, the microlens 31 can focus the target signal light, and the focused light passes through the light-transmitting microhole 33 to block and filter the stray light, thereby reducing the light intensity of the light received by the photosensitive device 60 and improving the signal-to-noise of the light signal ratio to improve image quality. The microlens 31 is a dome-shaped structure, and its overall radian can be between 7 degrees and 60 degrees, so that it can effectively gather signals and improve the signal-to-noise ratio. No lens assembly is required, and the object distance is shortened by using a microlens 31 with a small focal length.

In order to shorten the object distance and prevent stray light from entering the light-transmitting microhole 33, along the direction perpendicular to the flexible substrate 1, the distance between the microlens 31 and the corresponding light-transmitting microhole 33 and the distance between the microlens 31 Focal lengths match. In this way, the size of the light-transmitting microhole 33 only needs to allow the focused light to pass through, thereby reducing the size of the light-transmitting microhole 33 , effectively reducing the amount of stray light entering, and improving the signal-to-noise ratio. Specifically, the distance between the microlens 31 and the corresponding light-transmitting microhole 33 may be 0.8 times to 1.2 times the focal length of the microlens 31 .

In addition, the shape of the light-transmitting microhole 33 is preferably a circular hole, and it can also be a regular polygonal hole or an elliptical hole, and in some embodiments, it can also be an irregular hole, which is not the only limitation in this application.

In this embodiment, a plurality of microlenses 31 are arranged in an array. A plurality of light-transmitting microholes 33 on the light-removing portion 30 are arranged in an array. In order to prevent stray light from passing through the light-removing portion 30 , the number of light-transmitting microholes 33 is less than the number of microlenses 31 , that is, the number of light-transmitting microholes 33 is not more than the number of microlenses 31 .

Wherein, a plurality of light-transmitting microholes 33 are formed on the light-removing part 30, and these light-transmitting microholes 33 can limit the propagation path of the optical signal focused by the microlens 31, and at the same time, the microlens 31 with a small focal length can also effectively shorten the signal length. The transmission distance can effectively improve the performance of fingerprint identification components in the case of short object distance.

Specifically, the light-removing portion 30 is made of an opaque material, which can be a light-absorbing material or a reflective material. Specifically, the material of the light-removing portion 30 is metal. The metal light-removing part 30 can reflect stray light, and the reflected light enters the light-absorbing layer and is absorbed by the light-absorbing layer, so as to avoid interference to the light signal received by the light-sensing device 60 . Wherein, the microlenses 31 and the light-transmitting microholes 33 can be directly fabricated on the surface of the fingerprint recognition component 100 by photolithography or other techniques. For example, the microlens array and light-transmitting microholes 33 are directly fabricated on the uppermost protective layer of the alignment layer 3 .

In order to improve the signal-to-noise ratio of the image and filter out light in the spectral range not required for fingerprint imaging, the fingerprint recognition component 100 further includes: an infrared filter film 4 . The infrared filter film 4 can filter out infrared light, part of red light and invisible ultraviolet light in passing light. In the embodiment of the present application, the infrared filter film 4 can be disposed on any layer of the fingerprint recognition component 100 . For example, the infrared filter film 4 can be coated on any layer of the fingerprint recognition component 100 .

As shown in FIG. 1 , in this embodiment, the infrared filter film 4 is pasted on the surface of the alignment layer 3 away from the photosensitive layer 50 by optical glue. In another embodiment, as shown in FIG. 4 , the infrared filter film 4 is disposed between the alignment layer 3 and the photosensitive layer 50 . The infrared filter film 4 is bonded between the alignment layer 3 and the photosensitive layer 50 with optical glue, or the infrared filter film is provided on the surface of the photosensitive layer 50 by coating.

Please continue to refer to Figures 1 through 4. Based on the same idea, an embodiment of the present invention also provides a display component and an electronic device, as described in the following embodiments. Since the problem-solving principles of the display component and the electronic device and the technical effects that can be obtained are similar to those of the fingerprint recognition component 100, the implementation of the display component and the electronic device can refer to the implementation of the above-mentioned fingerprint recognition system, and the repetition will not be repeated.

Another embodiment of the present application provides a display assembly, including: an outer cover 300; a flexible OLED display 200 located inside the outer cover 300; the fingerprint identification assembly 100 described in any one of the above embodiments or implementations . The fingerprint recognition component 100 is fixed inside the display screen. The fingerprint recognition component 100 can be pasted on the inner side of the display screen.

Another embodiment of the present application provides an electronic device, including: the display component described in the above embodiments, or the fingerprint recognition component 100 described in any one of the above embodiments. Wherein, the electronic device includes a mobile phone. Certainly, the electronic device may also be electronic devices such as punch card machines and smart watches, which are not limited exclusively in this application.

It should be noted that the electronic device provided in this embodiment may have any suitable existing structures for the power supply part, the fingerprint identification signal processing part and other parts (such as the housing part and the camera part). In order to clearly and concisely illustrate the technical solution provided by this embodiment, the above-mentioned parts will not be described in detail here, and the accompanying drawings in the description are also simplified accordingly. However, it should be understood that the scope of this embodiment is not limited thereby.

It should also be noted that, for the flexible OLED display 200 mentioned above, the side facing the outer cover 300 is the front side, the outer side, and the upper side, and the side facing away from the outer cover 300 is the rear side, the inner side, and the lower side. Correspondingly, in the embodiment of the present application, when two components (component A and component B) are located, if component A is closer to the finger or the outer cover 300 than component B, then component A is considered to be located on the front side and outside of component B , the upper side, and the B part is located on the rear side, inner side and lower side of the A part.

Any numerical value quoted herein includes all values from the lower value to the upper value in increments of one unit, and there is a separation of at least two units between any lower value and any higher value. Can. For example, if it is stated that a component quantity or process variable (such as temperature, pressure, time, etc.) has a value from 1 to 90, preferably from 20 to 80, more preferably from 30 to 70, the purpose Values such as 15 to 85, 22 to 68, 43 to 51, 30 to 32, etc. are also explicitly listed in the specification. For values less than 1, one unit is considered to be 0.0001, 0.001, 0.01, 0.1, as appropriate. These are merely examples intended to be expressly stated, and it is considered that all possible combinations of numerical values recited between the lowest value and the highest value are expressly set forth in this specification in a similar manner.

Unless otherwise indicated, all ranges include the endpoints and all numbers between the endpoints. "About" or "approximately" used with a range applies to both endpoints of the range. Thus, "about 20 to 30" is intended to cover "about 20 to about 30", inclusive of at least the indicated endpoints.

All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of" describing a combination shall include the identified elements, ingredients, parts or steps as well as other elements, ingredients, parts or steps that do not substantially affect the basic novel characteristics of the combination. Use of the terms "comprising" or "comprising" to describe a combination of elements, ingredients, parts or steps herein also contemplates an embodiment that consists essentially of these elements, ingredients, parts or steps. By using the term "may" herein, it is intended that inclusion of "may" in any of the described attributes is optional.

Multiple elements, ingredients, parts or steps can be provided by a single integrated element, ingredient, part or step. Alternatively, a single integrated element, ingredient, part or step may be divided into separate plural elements, ingredients, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not meant to exclude other elements, ingredients, parts or steps.

It should be understood that the foregoing description is for purposes of illustration and not limitation. Many implementations and many applications other than the examples provided will be apparent to those of skill in the art from reading the above description. The scope of the present teachings, therefore, should be determined not with reference to the above description, but should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for completeness. The omission from the preceding claims of any aspect of the subject matter disclosed herein is not intended to be a disclaimer of such subject matter, nor should it be considered that the inventors did not consider the subject matter to be part of the disclosed inventive subject matter.

Claims (13)

1. A fingerprint identification assembly, comprising:

A flexible photosensitive layer; the flexible photosensitive layer comprises a flexible substrate, a transistor array arranged on the flexible substrate and a light sensing device array connected with the transistor;

A flexible collimating layer disposed on the flexible photosensitive layer; the flexible collimating layer is used for enabling the light rays to form a collimated light signal.

2. The fingerprint identification assembly of claim 1, wherein the flexible collimating layer comprises a light stripping portion disposed on the photosensitive layer, and a plurality of microlenses disposed on the light stripping portion; the light removing part covers the photosensitive layer; the light removing part is provided with a plurality of light-transmitting micropores; the light focused by the micro lens can pass through the corresponding light-transmitting micro hole and is received by the light-sensing device.

3. The fingerprint identification assembly of claim 1, wherein the material of the flexible substrate comprises polyimide or TAC.

4. The fingerprint identification assembly of claim 1, further comprising: the infrared filter membrane is attached to the surface, far away from the flexible photosensitive layer, of the flexible collimation layer through optical cement.

5. The fingerprint identification assembly of claim 1, further comprising: an infrared filter membrane; the infrared filter membrane is arranged between the flexible collimation layer and the flexible photosensitive layer.

6. The fingerprint identification assembly of claim 5, wherein the infrared filter membrane is attached between the flexible alignment layer and the flexible photosensitive layer by an optical adhesive, or the infrared filter membrane is disposed on the surface of the flexible photosensitive layer by coating.

7. The fingerprint identification assembly of claim 2, wherein said light transmissive micro-holes are arranged in a one-to-one correspondence with said micro-lenses.

8. The fingerprint identification assembly of claim 2, wherein said micro-lens is made of a transparent resin material; the light removing part is formed by metal holes or black glue holes.

9. The fingerprint identification assembly of claim 7, wherein the microlenses and corresponding light-transmissive micro-apertures are aligned in a direction perpendicular to the substrate.

10. The fingerprint identification assembly of claim 7, wherein the microlenses are aligned with the pitch of the corresponding light-transmissive micro-apertures and the focal length of the micro-apertures in a direction perpendicular to the substrate.

11. The fingerprint identification assembly of claim 1, wherein the array of light sensing devices comprises a plurality of light sensing devices; the transistor array comprises a plurality of thin film transistors; the plurality of light sensing devices in the light sensing device array are arranged in one-to-one correspondence with the plurality of thin film transistors in the transistor array.

12. A display assembly, comprising:

An outer cover plate;

The flexible OLED display screen is positioned on the inner side of the outer cover plate;

The fingerprint identification assembly of any one of claims 1 to 11, said fingerprint identification assembly being secured to an interior side of said display screen.

13. An electronic device, characterized in that the electronic device comprises: a display assembly as claimed in claim 12, or a fingerprint identification assembly as claimed in any one of claims 1 to 11.