CN112639800A

CN112639800A - OLED screen body, fingerprint identification module and terminal equipment

Info

Publication number: CN112639800A
Application number: CN201880095916.6A
Authority: CN
Inventors: 许志高; 洪定洋
Original assignee: Shenzhen Royole Technologies Co Ltd
Current assignee: Shenzhen Royole Technologies Co Ltd
Priority date: 2018-12-18
Filing date: 2018-12-18
Publication date: 2021-04-09
Also published as: WO2020124370A1

Abstract

An OLED screen body (100) and a fingerprint identification module and a terminal device comprising the OLED screen body (100). The OLED screen body (100) comprises: a light-emitting layer (10) that emits first outgoing light (111) and second outgoing light (112); the first polarizing layer (21) and the second polarizing layer (22) are respectively arranged on two sides of the light emitting layer (10); the second emergent light (112) is not transmitted through the first polarizing layer (21) and is reflected among the inner levels of the OLED screen body (100) to be incident to the second polarizing layer (22), and is attenuated under the action of the second polarizing layer (22). The second polarizing layer (22) can attenuate second emergent light (112) reflected by each layer structure in the OLED screen body (100), and interference caused by the second emergent light (112) to the first emergent light (111) is reduced.

Description

OLED screen body, fingerprint identification module and terminal equipment

Technical Field

The application relates to the technical field of optical display, in particular to an OLED screen body, and a fingerprint identification module and terminal equipment comprising the OLED screen body.

Background

The Organic Light-Emitting semiconductor (OLED) display screen has excellent characteristics of self-luminescence, high contrast, thin thickness, wide viewing angle, and the like, and can be applied to a flexible panel, and thus has a very good development prospect.

The OLED display screen is of a thin film laminated structure, has a good emergent light source and is excellent in display effect. The emergent light source of the OLED display screen can be applied to a working light source in optical photosensitive recognition. Inevitably, part of emergent light of the light source reflected by each layer structure in the OLED display screen can be shot into the photosensitive element used for photosensitive identification, so that interference is caused to the photosensitive identification, and the identification accuracy of the photosensitive element is influenced.

Disclosure of Invention

In view of this, the present application is directed to provide an OLED panel, a fingerprint identification module and a terminal device, which can attenuate a part of the emergent light reflected by each layer structure of a light source in an OLED display.

Accordingly, the present application provides in a first aspect an OLED panel comprising:

the light emitting layer is used for generating emergent light, and the emergent light comprises first emergent light and second emergent light;

the first polarizing layer is arranged on one side of the light emitting layer; and

the second polarizing layer is arranged on the other side of the light emitting layer;

the first emergent light is transmitted to the first polarizing layer, reflected by a reflector outside the OLED screen body, transmitted to the first polarizing layer again and then transmitted to the second polarizing layer; the second emergent light is not transmitted through the first polarizing layer, is reflected among the inner layers of the OLED screen body and then is incident to the second polarizing layer, and is attenuated under the action of the second polarizing layer.

Optionally, the first polarizing layer includes a first 1/4 wave plate and a first linear polarizer, the first 1/4 wave plate is attached to the first linear polarizer, and the first 1/4 wave plate is located between the first linear polarizer and the light emitting layer.

Optionally, the second polarization layer includes a second 1/4 wave plate and a second linear polarizer, the second 1/4 wave plate is attached to the second linear polarizer, and the second 1/4 wave plate is located the second linear polarizer and between the light-emitting layers, wherein the first outgoing light is transmitted through the vibration direction of the light of the second 1/4 wave plate and the polarization direction of the second linear polarizer are parallel.

Optionally, the light emitting layer comprises:

an anode;

the cathode comprises a bearing surface, and the first polarizing layer is arranged on the bearing surface;

and the organic functional layer is arranged between the anode and the cathode in a stacked manner, wherein the light emergent direction of the organic functional layer is from the organic functional layer to the cathode.

Optionally, the light emitting layer further includes a supporting layer, the supporting layer is disposed between the anode and the second polarizing layer, and the second polarizing layer is attached to a side of the supporting layer away from the anode.

Optionally, the OLED screen further includes a thin film transistor layer disposed on a side of the anode away from the first polarizing layer, and the thin film transistor layer is stacked with the anode to drive the light emitting layer.

Optionally, the OLED screen further includes a touch layer disposed on a side of the first polarizing layer away from the cathode.

Based on the OLED screen body of above-mentioned first aspect, this application second aspect provides a fingerprint identification module, including sensitization component and the OLED screen body, sensitization component set up in the second polarisation layer is kept away from one side of luminescent layer.

Optionally, the fingerprint identification module further comprises an installation layer; the mounting layer is attached to the OLED screen body, photosensitive holes are formed in the mounting layer, and the photosensitive elements are mounted in the photosensitive holes.

Optionally, the area of the second polarizing layer is larger than the opening area of the photosensitive hole.

Optionally, the OLED screen body comprises a fingerprint identification region; the photosensitive hole corresponds to the fingerprint identification area.

Optionally, the mounting layer is further provided with a light absorption region for absorbing incident light.

Optionally, the light absorbing region is disposed along a periphery of the photosensitive hole.

Optionally, the light absorbing region is a black coating or black plastic.

Based on the fingerprint identification module of above-mentioned second aspect, this application third aspect provides a terminal equipment, includes the fingerprint identification module.

In the OLED screen provided in the embodiment of the application, the first polarizing layer is disposed on one side of the light emitting layer, the second polarizing layer is disposed on the other side of the light emitting layer, and the first outgoing light is transmitted to the first polarizing layer, reflected by a reflector outside the OLED screen, and transmitted through the first polarizing layer again and then transmitted through the second polarizing layer; the second emergent light does not transmit the first polarizing layer and is incident to the second polarizing layer after being reflected among the levels inside the OLED screen body, and is attenuated under the action of the second polarizing layer, so that the second emergent light can be prevented from interfering with the first emergent light.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be briefly described below. It is obvious that the drawings described below are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

FIG. 1 is a schematic structural diagram of an OLED panel according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of the structure of a first polarizing layer of the OLED panel shown in FIG. 1;

FIG. 3 is a schematic diagram of the structure of the second polarizing layer of the OLED panel shown in FIG. 1;

fig. 4 is a schematic structural diagram of a fingerprint identification module according to another embodiment of the present application;

fig. 5 is a schematic structural diagram of a fingerprint identification module according to another embodiment of the present application.

The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.

Detailed Description

In order to facilitate an understanding of the present application, the present application is described in more detail below with reference to the accompanying drawings and specific embodiments. It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical", "horizontal", "left", "right", "inside", "outside" and the like used in the present specification are for illustrative purposes only and express only a substantial positional relationship, for example, with respect to "vertical", if a positional relationship is not strictly vertical for the purpose of achieving a certain object, but is substantially vertical, or utilizes the property of being vertical, it belongs to the category of "vertical" described in the present specification.

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

It is to be understood that, as shown herein, the positional relationship between one or more layers of the substance involved in the embodiments of the present application, such as the terms "stacked" or "formed" or "applied" or "disposed", is expressed using terms such as: any terms such as "stacked" or "formed" or "applied" may cover all manner, kinds and techniques of "stacked". For example, sputtering, plating, molding, Chemical Vapor Deposition (CVD), Physical Vapor Deposition (PVD), evaporation, Hybrid Physical-Chemical Vapor Deposition (HPCVD), Plasma Enhanced Chemical Vapor Deposition (PECVD), Low Pressure Chemical Vapor Deposition (LPCVD), and the like.

In addition, the technical features mentioned in the different embodiments of the present application described below may be combined with each other as long as they do not conflict with each other.

Referring to fig. 1, a first aspect of the present disclosure provides an OLED panel 100 including a light emitting layer 10, a first polarizing layer 21, and a second polarizing layer 22. The first polarizing layer 21 is disposed on one side of the light emitting layer 10, and the second polarizing layer 22 is disposed on the other side of the light emitting layer 10.

In some embodiments, the connection between the light emitting layer 10 and the first and second polarizing

layers

21 and 22 may be optical adhesive fixing connection, embedded pressing fixing connection, or layer plating connection.

The light emitting layer 10 is used for generating incident light and providing an emergent light source, so that the emergent light source can be applied to various scenes, and the emergent light source is fully utilized. For example, the light emitted from the light-emitting layer 10 may be applied to a working light source in optical photosensitive recognition, or the light emitted from the light-emitting layer 10 may be applied to pixel display in image display, that is, the light-emitting layer 10 may be applied to display screen display, or optical photosensitive recognition under a display screen.

It will be appreciated that the light source provided by the luminescent layer 10 may also be applied in other optical technology areas. In the embodiment of the present application, the light emitting layer 10 is a flexible OLED display applied in a display device, and an optical fingerprint identification module under the OLED display.

In some embodiments, as shown in fig. 1, the light emitting layer 10 is used for generating emitted light, and in this embodiment, the emitted light is divided into two parts according to the light path of the emitted light, including a first emitted light 111 and a second emitted light 112. Wherein, the optical path of the first emergent light 111 is: is transmitted toward the first polarizing layer 21, is reflected by a reflector, such as a finger fingerprint, is transmitted again through the first polarizing layer 21, and is then transmitted through the second polarizing layer 22. The first emergent light 111 reflected by the reflector outside the OLED screen 100 carries an optical signal of reflector information, and is recognized by the photosensitive recognition element after being transmitted by the second polarizing layer 22, that is, the first emergent light 111 is used as a working light source. Then, the optical path of the second outgoing light 112 is: in the emitting process, the light is reflected by the internal layer structure in the light emitting layer 10 or other layer structure in the screen body, for example, the cathode of the light emitting layer 10, but is not transmitted by the first polarizing layer 21, and directly enters the second polarizing layer 22, and the light does not carry an optical signal of reflector information, and if the light directly enters the photosensitive element, the light interferes with the photosensitive identification of the photosensitive element, in this embodiment, the second polarizing layer 22 is further disposed below the light emitting layer 10, and the second emitting light 112 is attenuated by the second polarizing layer 22. Therefore, the OLED screen 100 can weaken the second outgoing light 112, and reduce interference of the second outgoing light 112 to the first outgoing light 111.

In some embodiments, the light-emitting layer 10 employs an organic light-emitting diode display technology, i.e., an OLED display technology.

With reference to fig. 1, the light-emitting layer 10 includes an organic functional layer 11, a cathode 12 and an anode 13. The organic functional layer 11 is stacked between the cathode 12 and the anode 13 to emit light.

Optionally, the organic functional layer 11 is prepared by doping a host material with a certain proportion of organic luminescent material. Under the condition of applying an external voltage, holes of the anode 13 migrate to the organic functional layer 11, electrons of the cathode 12 migrate to the organic functional layer 11, the electrons and the holes meet in the organic functional layer 11 to form electron-hole pairs, the electrons transit from an excited state to a ground state, and energy is released in the form of radiation photons, so that electroluminescence is generated. The organic luminescent material can be selected from organic micromolecular materials or organic polymer materials to realize electroluminescence.

When an external voltage is applied to the cathode 12, electrons of the cathode 12 migrate to the organic functional layer 11. The cathode 12 may be made of aluminum, magnesium, silver, molybdenum, titanium or an alloy thereof.

When an external voltage is applied to the anode 13, holes in the anode 13 migrate to the organic functional layer 11. The anode 13 may have a single-layer structure or a multi-layer structure. The anode 13 of a single layer structure may include a metal layer having Ag, Mg, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, or a mixture thereof. The anode of the multilayer structure may include a metal layer having Ag, Mg, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, or a mixture thereof and a transparent conductive oxide layer including a transparent conductive oxide material. The transparent conductive oxide material may include one or more of Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), zinc oxide (ZnO), and Indium Tin Zinc Oxide (ITZO). For example, the anode 13 of the multilayer structure may be configured as a three-layer structure including a first transparent conductive oxide layer, a metal layer, and a second transparent conductive oxide layer.

In some embodiments, the anode 13 has a single-layer structure, so that holes of the anode 13 can migrate to the organic functional layer 11 and form electron-hole pairs with electrons, thereby making the organic functional layer 11 emit light.

In the OLED display technology, the light emitting layer 10 is combined by a plurality of functional layers into a laminated structure to have a light emitting function, so that an outgoing light source can be provided. The light emitting layer 10 includes main body emission light and partial emission light. The main body light emission of the light emitting layer 10 is determined by the light emission direction of the organic functional layer 11 of the light emitting layer 10. Specifically, the organic functional layer 11 is used for emitting a light source, and the emitted light repeatedly reflects or transmits light between the thin film functional layers, wherein most of the light is transmitted along a configured specific light emitting direction. For example, when the organic functional layer 11 faces the cathode 12, and the cathode 12 is a light-transmitting electrode, the light-emitting direction of the organic functional layer 11 is directed from the organic functional layer 11 to the cathode 12, and most of the light emitted from the organic functional layer 11 can transmit through the cathode 12, so as to form the main body light-emitting of the light-emitting layer 10.

In some embodiments, a part of the light emitted from the organic functional layer 11 is reflected between the functional layers and then emitted in another direction to form a part of the emitted light, for example, the part of the emitted light is emitted in a light emitting direction away from the organic functional layer 11, or is emitted obliquely in the extending direction of the functional layers. In particular, when the light emitting direction of the organic functional layer 11 is directed from the organic functional layer 11 to the cathode 12, part of the light emitted from the organic functional layer 11 is emitted away from the light emitting direction of the organic functional layer 11 under the reflection action of the cathode 12.

In the embodiment of the present application, the light emitting layer 10 provides an emission light source, which includes a main body emission light and a partial emission light, and since the main body emission light is a majority of light sources and the partial emission light is a minority of light sources, the main body emission light is fully utilized to reduce interference of the partial emission light to the main body emission light, so that the OLED screen body 100 is provided.

Further, the first polarizing layer 21 and/or the second polarizing layer 22 are circular polarizing layers, and the first polarizing layer 21 and the second polarizing layer 22 are symmetrically disposed. In some embodiments, referring to fig. 2, the first polarizing layer 21 includes a first linear polarizer 21a and a first 1/4 wave plate 21b stacked together, the first 1/4 wave plate 21b is attached to the first linear polarizer 21a, and the first 1/4 wave plate 21b is located between the first linear polarizer 21a and the light emitting layer 10, that is, the first linear polarizer 21a of the first polarizing layer 21 is disposed away from the light emitting layer 10.

Referring to fig. 3, the second polarizing layer 22 includes a second linear polarizer 22a and a second 1/4 wave plate 22b stacked together, the second 1/4 wave plate 22b is attached to the second linear polarizer 22a, and the second 1/4 wave plate 22b is located between the second linear polarizer 22a and the light emitting layer 10, that is, the second linear polarizer 22a of the second polarizing layer 22 is disposed away from the light emitting layer 10.

Optionally, a part of light of the main body outgoing light of the light emitting layer 10 is the first outgoing light 111, the first outgoing light 111 sequentially transmits the first 1/4 wave plate 21b and the first linear polarizer 21a of the first polarizing layer 21, the first outgoing light 111 is reflected by a reflector (such as a fingerprint of a finger), and sequentially transmits the first linear polarizer 21a and the first 1/4 wave plate 21b of the first polarizing layer 21 again, so as to form circularly polarized light, the circularly polarized light transmits the second 1/4 wave plate 22b of the second polarizing layer 22, so as to form linearly polarized light, a vibration direction of the linearly polarized light is parallel to a polarization direction of the second linear polarizer 22a of the second polarizing layer 22, so that the linearly polarized light transmits the second linear polarizer 22a of the second polarizing layer 22, and light energy is not lost. However, part of the outgoing light of the light emitting layer 10 is the second outgoing light 112, the second outgoing light 112 is not transmitted through the first polarizing layer 21, and directly enters the second 1/4 wave plate 22b and the second linear polarizer 22a of the second polarizing layer 22, so that the light is absorbed by the second 1/4 wave plate 22b and the second linear polarizer 22a of the second polarizing layer 22, which results in serious energy loss, wherein the incoming light in the second outgoing light 112 whose vibration direction is not parallel to the polarization direction of the second linear polarizer 22a is absorbed, which results in serious energy loss of the second outgoing light 112. Therefore, in this embodiment of the application, first emergent light 111 can be better applied to the fingerprint identification in the optical fingerprint sensitization identification, avoids simultaneously second emergent light 112 is right first emergent light 111 causes the interference to improve the accuracy and the definition of optical fingerprint sensitization identification.

It can be understood that other optical path structures may be added to the structure of the OLED screen body 100 to change the optical path in the OLED screen body 100, and some optical paths are selected as the first outgoing light 111 to fully utilize the light source of the OLED screen body 100.

In some embodiments, with continuing reference to fig. 1, the light emitting direction of the organic functional layer 11 is configured to be directed from the organic functional layer 11 to the cathode 12, i.e. the main body light emitted from the light emitting layer 10 is directed from the organic functional layer 11 to the cathode 12. The first polarizing layer 21 is disposed on a side of the cathode 12 away from the organic functional layer 11, and the second polarizing layer 22 is disposed on a side of the anode 13 away from the organic functional layer 11, wherein a first linear polarizer 21a of the first polarizing layer 21 is disposed on a side away from the organic functional layer 11; the second linear polarizer 22a of the second polarizing layer 22 is disposed away from the organic functional layer 11.

In some embodiments, referring to fig. 4, the light-emitting layer 10 further includes a support layer 131. The anode 13 is disposed on one side of the supporting layer 131, the second polarizing layer 22 is disposed on the other side of the supporting layer 131, and the supporting layer 131 is disposed between the anode 13 and the second polarizing layer 22. The cathode 12 includes a carrying surface, and the first polarizing layer 21 is disposed on the carrying surface. The organic functional layer 11 is stacked between the anode 13 and the cathode 12 to emit light.

It is understood that the OLED panel 100 further includes a thin film transistor layer (not shown) disposed on a side of the anode 13 away from the first polarizing layer 21, and the thin film transistor layer is stacked with the anode 13 to drive the light emitting layer 10. Specifically, the thin film transistor layer is electrically connected to the anode 13, and is configured to drive the organic functional layer 11 to emit light. It is understood that the structure of the thin-film transistor layer and how to scan and drive the organic functional layer 11 on the anode 13 to emit light are understood by those skilled in the art.

In some embodiments, with continued reference to fig. 4, the light emitting layer 10 further includes a thin film encapsulation layer 121, and the thin film encapsulation layer 121 is stacked on the cathode 12 and located between the cathode 12 and the first polarizing layer 21. The thin film cover layer 121 is used for protecting the metal and metal alloy of the cathode 12, thereby prolonging the service life.

In some embodiments, with continued reference to fig. 4, the OLED panel 100 further includes a touch layer 14, and the touch layer 14 is disposed on a side of the first polarizing layer 21 away from the cathode 12. The touch layer 14 can be in contact with a finger fingerprint of a user to enable optical fingerprint sensing identification. The touch layer 14 can enhance the service performance of the OLED screen body 100, so that the OLED screen body 100 can have a superior display effect, and can perform human-computer interaction to enhance the product experience.

It is understood that the OLED panel 100 may further include other film layers to improve the light extraction or display effect of the OLED panel 100, so as to be suitable for more application scenarios. For example, an electron injection layer and an electron transport layer may be provided between the cathode 12 and the organic functional layer 11, and a hole injection layer and a hole transport layer may be provided between the anode 13 and the organic functional layer 11.

Referring to fig. 4 and 5, based on the OLED panel 100, a second aspect of the present invention provides a fingerprint identification module, which includes a photosensitive element 200 and the OLED panel 100. The photosensitive element 200 is matched with the OLED screen 100 to form the fingerprint identification module. Optionally, the main body outgoing light of the light emitting layer 10 of the OLED panel 100 is used as the sensing light source of the photosensitive element 200, that is, the first outgoing light 111 is used as the sensing light source of the photosensitive element 200. The photosensitive element 200 can be embedded in the OLED panel 100, or attached to the OLED panel 100. The OLED screen body 100 and the photosensitive element 200 can be fixed by embedding and pressing or fixed by bonding optical cement, and optionally, the OLED screen body 100 and the photosensitive element 200 are fixed by bonding through optical cement.

The OLED panel 100 includes the light emitting layer 10, the first polarizing layer 21, and the second polarizing layer 22. The first polarizing layer 21 is disposed on one side of the light emitting layer 10, and the second polarizing layer 22 is disposed on the other side of the light emitting layer 10 and is opposite to the first polarizing layer 21. The light emitting layer 10 includes the organic functional layer 11, the cathode 12, and the anode 13, and the organic functional layer 11 is stacked between the cathode 12 and the anode 13 to emit light.

In some embodiments, the light emitted from the light emitting layer 10 includes a main body light and a part of the light emitted from the main body of the light emitting layer 10, and the part of the light emitted from the main body of the light emitting layer 10 is the first light 111 and the part of the light emitted from the main body of the light emitting layer 10 is the second light 112. The first emergent light 111 is used as a working light source of the fingerprint identification module, the first emergent light 111 transmits to the first polarizing layer 21, is reflected by a reflector (such as a fingerprint of a finger of a user), and transmits to the second polarizing layer 22 after transmitting to the first polarizing layer 21 again; the second emergent light 112 is not transmitted through the first polarizing layer 21, is reflected by the inner stages of the OLED panel 100, and then enters the second polarizing layer 22, and is attenuated by the second polarizing layer 22, so that the light energy loss is serious. The photosensitive element 200 is disposed on the second polarizing layer 22 away from the light-emitting layer 10, and performs photosensitive recognition on the first emergent light 111 to perform fingerprint photosensitive recognition.

In some embodiments, as shown in fig. 4, the photosensitive element 200 may be attached to the OLED panel 100, and optionally, the photosensitive element 200 is fixedly attached to the second polarizing layer 22 through an optical adhesive.

In some embodiments, with continued reference to fig. 5, the photosensitive element 200 is mounted and matched with the OLED panel 100 through a mounting layer 210. The mounting layer 210 is provided with a photosensitive hole 211, and the photosensitive element 200 is mounted in the photosensitive hole 211. Specifically, the second polarizing layer 22 of the OLED panel 100 is fixedly attached to the mounting layer 210 through an optical adhesive.

The OLED screen body 100 provides the first emergent light 111 to serve as a working light source of the fingerprint identification module. First emergent light 111 warp the reflection of user's finger fingerprint carries fingerprint information's light transmission in proper order first polarisation layer 21 second polarisation layer 22, and the warp photosensitive element 200 response discernment, photosensitive element 200 confirms the line information of finger according to the light intensity of light to can realize fingerprint identification.

It is understood that the second polarizing layer 22 may be set to have an area size according to practical situations, for example, the second polarizing layer 22 is larger than the opening area of the photosensitive holes 211 to cover the photosensitive holes 211, or the second polarizing layer 22 is equivalent to the size of the OLED screen 100. When the second polarizing layer 22 can cover the photosensitive hole 211, the second polarizing layer 22 is simple in production process and assembly, and production cost is saved, but the coverage area of the second polarizing layer 22 is small, and only part of the second emergent light 112 is absorbed, and the second emergent light 112 is reflected and oscillated for multiple times to be possibly injected into the photosensitive element 200, so that photosensitive interference is caused. When the second polarizing layer 22 and the OLED screen 100 are equal in size, the coverage area of the second polarizing layer 22 is large, and the second polarizing layer absorbs most of the second emergent light 112, so that the second emergent light 112 is prevented from being reflected and oscillated for many times and falling into the photosensitive element 200, and photosensitive interference is avoided. Therefore, the size of the second polarizing layer 22 should be selected by those skilled in the art according to actual needs.

In some embodiments, the first polarizing layer 21 is disposed opposite to the second polarizing layer 22, and an incident light area of the second polarizing layer 22 is greater than or equal to an incident light area of the first polarizing layer 21, so as to ensure that the second outgoing light 112 can fall into the second polarizing layer to be absorbed and attenuated, and avoid the second outgoing light 112 from multiple reflection oscillations and falling into the photosensitive element 200.

With continued reference to fig. 5, in order to further reduce the photosensitive interference of the second outgoing light 112 on the photosensitive element 200, in some embodiments, the mounting layer 210 is further provided with a light absorption region 212, and the light absorption region 212 can absorb the incident light. The light absorption region 212 absorbs incident light, so as to prevent the incident light from further reflecting and oscillating for multiple times and falling into the photosensitive element 200, thereby avoiding photosensitive interference. Further, the light absorbing regions 212 are disposed along the periphery of the light sensing hole 211, so that incident light rays at the periphery of the light sensing hole 211 are absorbed in time, and photosensitive interference is avoided. Optionally, the light absorbing region 212 is a black coating or black plastic to enable light absorption effect. It is understood that other light absorption materials can be used for the light absorption region 212 to have a good light absorption effect.

It is understood that the OLED screen 100 further includes a fingerprint identification region. The photosensitive hole 211 corresponds to a fingerprint identification area on the OLED screen 100. The first emergent light 111 is used as a working light source of the photosensitive element 200, and the first emergent light 111 is in the fingerprint identification area of the OLED screen body 100 and the shortest path between the photosensitive holes 211 so as to improve the accuracy and the definition of fingerprint photosensitive identification.

It can be understood that, in order to fully utilize the first outgoing light 111 as a working light source and avoid the second outgoing light 112 from interfering with the first outgoing light 111, a light absorption layer is further disposed between the light emitting layer 10 and the second polarizing layer 22, wherein the light absorption layer is provided with a via hole corresponding to the position of the light sensing hole 211. The light absorption layer can carry out the light absorption to second emergent light 112 to avoid it to fall into in the multiple reflection oscillation between layer and layer the sensitization component 200 is in order to disturb first emergent light 111 is in sensitization reaction on the sensitization component 200 causes the sensitization to discern inaccurately, and the sensitization discerns the problem such as unclear.

Based on above-mentioned fingerprint identification module, the third aspect of the embodiment of this application provides a terminal equipment, include the fingerprint identification module. The terminal device includes but is not limited to smart identification control devices such as smart phones, tablet computers, PC terminals, smart televisions and the like.

In the technical scheme of the application, the OLED screen body 100 can fully utilize the main body emergent light of the light emitting layer 10, for example, the first emergent light 111 especially can be applied to the technical field of optical photosensitive recognition. Meanwhile, the OLED screen 100 can also prevent part of the outgoing light of the light emitting layer 10, for example, the second outgoing light 112 from interfering with the first outgoing light 111, so as to improve the use quality of the first outgoing light 111.

In the technical scheme of the fingerprint identification module, the first emergent light 111 of the OLED screen body 100 is used as a working light source in fingerprint photosensitive identification, the advantages of the OLED screen body 100, good light source quality, softness and thin thickness of the screen body and the like are fully utilized, and the photosensitive element 200 is arranged below the OLED screen body 100. In addition, the OLED screen 100 can prevent the second outgoing light 112 of the light emitting layer 10 from interfering with the use of the first outgoing light 111.

The embodiments described above are exemplary embodiments of the present application, but the embodiments of the present application are not limited to the embodiments described above, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present application should be regarded as equivalent substitutions and are included in the scope of the present application.

Claims

An OLED screen, comprising:

the light emitting layer is used for generating emergent light, and the emergent light comprises first emergent light and second emergent light;

the first polarizing layer is arranged on one side of the light emitting layer; and

the second polarizing layer is arranged on the other side of the light emitting layer;

the first emergent light is transmitted to the first polarizing layer, reflected by a reflector outside the OLED screen body, transmitted to the first polarizing layer again and then transmitted to the second polarizing layer; the second emergent light is not transmitted through the first polarizing layer, is reflected among the inner layers of the OLED screen body and then is incident to the second polarizing layer, and is attenuated under the action of the second polarizing layer.
The OLED screen of claim 1, wherein the first polarizing layer comprises a first 1/4 wave plate and a first linear polarizer, the first 1/4 wave plate is attached to the first linear polarizer, and the first 1/4 wave plate is located between the first linear polarizer and the light emitting layer.
The OLED screen of claim 2, wherein the second polarizing layer comprises a second 1/4 wave plate and a second linear polarizer, the second 1/4 wave plate is attached to the second linear polarizer, and the second 1/4 wave plate is located between the second linear polarizer and the light emitting layer, wherein the vibration direction of the light ray of the first outgoing light transmitted through the second 1/4 wave plate is parallel to the polarization direction of the second linear polarizer.
An OLED screen according to any one of claims 1 to 3, wherein the light-emitting layer comprises:

an anode;

the cathode comprises a bearing surface, and the first polarizing layer is arranged on the bearing surface;

and the organic functional layer is arranged between the anode and the cathode in a stacked manner, wherein the light emergent direction of the organic functional layer is from the organic functional layer to the cathode.
The OLED screen of claim 4, wherein the light-emitting layer further comprises a support layer disposed between the anode and the second polarizing layer, the second polarizing layer being attached to the support layer on a side away from the anode.
The OLED screen of claim 5, further comprising a thin film transistor layer disposed on a side of the anode away from the first polarizing layer, the thin film transistor layer being stacked with the anode to drive the light emitting layer.
The OLED screen according to any one of claims 1 to 6, further comprising a touch layer disposed on a side of the first polarizing layer away from the cathode.
A fingerprint identification module, comprising a photosensitive element and the OLED screen of any one of claims 1 to 7, wherein the photosensitive element is disposed on a side of the second polarizing layer away from the light-emitting layer.
The fingerprint identification module of claim 8, wherein the fingerprint identification module further comprises a mounting layer; the mounting layer is attached to the OLED screen body, photosensitive holes are formed in the mounting layer, and the photosensitive elements are mounted in the photosensitive holes.
The fingerprint identification module of claim 9, wherein the area of the second polarizer layer is larger than the opening area of the photosensitive hole.
The fingerprint identification module of claim 9,

the OLED screen body comprises a fingerprint identification area;

the photosensitive hole corresponds to the fingerprint identification area.
The fingerprint identification module of claim 9, wherein the mounting layer is further provided with a light absorption region for absorbing incident light.
The fingerprint identification module of claim 12, wherein the light absorbing region is disposed along a periphery of the photosensitive hole.
The fingerprint identification module of claim 13 wherein the light absorbing region is a black coating or black plastic.
A terminal device, characterized in that it comprises a fingerprint recognition module according to any one of claims 8 to 14.