CN211454015U

CN211454015U - Polaroid, display module and display device

Info

Publication number: CN211454015U
Application number: CN201921439155.XU
Authority: CN
Inventors: 刘会敏; 骆欣涛; 程小平
Original assignee: Huawei Machine Co Ltd
Current assignee: Huawei Machine Co Ltd
Priority date: 2019-08-29
Filing date: 2019-08-29
Publication date: 2020-09-08
Anticipated expiration: 2029-08-29

Abstract

The application discloses a polaroid belongs to the technical field of display. The polarizer includes: the optical film comprises a linear polarizer layer and a first phase difference film layer positioned on one side of the linear polarizer layer; the linear polarizer layer is provided with a first groove, a first light-transmitting filling material is filled in the first groove, and the elastic modulus of the first light-transmitting filling material is smaller than that of the material of the linear polarizer layer; the first phase difference film layer is used for being matched with the linear polarizer layer, so that light passing through the first phase difference film layer and exiting from the linear polarizer layer is circularly polarized light. In addition, the application also discloses a display module comprising the polaroid and a display device comprising the display module. The display device is used for reducing the probability of breakage of the display device.

Description

Polaroid, display module and display device

Technical Field

The application relates to the technical field of display, in particular to a polaroid, a display module and a display device.

Background

With the progress of display technology, flexible display devices become display devices with great application prospects in the current display field due to the characteristics of deformability and foldability of the flexible display devices. The flexible display device generally includes: display panel, touch electrode layer, polaroid and transparent cover plate.

In the related art, the polarizer includes a linear polarizer layer and a phase difference film layer laminated on a transparent cover plate, and the materials of the phase difference film layer and the linear polarizer layer are both coating type liquid crystal materials.

However, since the elastic modulus of the coating type liquid crystal material is generally large, the flexible display device is easily broken when the flexible display device is bent. The elastic modulus refers to the ratio of stress to strain of a material under stress, and the stress refers to the additional internal force borne by the material in a unit area. Strain refers to the mechanical quantity of the degree of deformation of a material when the material is deformed by a force.

SUMMERY OF THE UTILITY MODEL

The application provides a polaroid, display module assembly and display device, can solve the easy cracked problem of display device among the correlation technique, technical scheme is as follows:

in a first aspect, a polarizer is provided, the polarizer comprising: the optical film comprises a linear polarizer layer and a first phase difference film layer positioned on one side of the linear polarizer layer. The linear polarizer layer is provided with a first groove, first light-transmitting filling materials are filled in the first groove, and the elastic modulus of the first light-transmitting filling materials is smaller than that of the material of the linear polarizer layer. The orthographic projection of the first phase difference film layer on the plane where the surface of the linear polarizer layer is located covers the surface of the linear polarizer layer, and the first phase difference film layer is used for being matched with the linear polarizer layer, so that light which passes through the first phase difference film layer and is emitted from the linear polarizer layer is circularly polarized light.

The polaroid that this application embodiment provided, because line polaroid layer has first recess in this polaroid, the elastic modulus of the first printing opacity filling material who fills in this first recess is less than the elastic modulus of the material of line polaroid layer, consequently, has reduced the average elastic modulus of this line polaroid layer place rete to reduce the bending force that the polaroid received when buckling, reduced the cracked probability of polaroid.

The first light-transmitting filling material may be a light-transmitting adhesive material. Because the elastic modulus of the transparent bonding material is usually smaller than that of the material of the linear polarizer layer, the average elastic modulus of the film layer where the linear polarizer layer is located is reduced, so that the bending force of the polarizer during bending is reduced, and the breakage probability of the polarizer is reduced. Further, under the condition that the first light-transmitting filling material is a light-transmitting bonding material, the linear polarizer layer and the first phase difference film layer can be attached through the light-transmitting bonding material filled into the first groove, so that the linear polarizer layer and the first phase difference film layer are not required to be attached by using an optical adhesive layer, and the thinning of the polarizer is realized.

Alternatively, the first groove in the linear polarizer layer may be a through groove (i.e., a through hole) or a blind groove. When the first groove is a through groove, the first groove penetrates through the linear polarizer layer in a reference direction, the reference direction is crossed with a contact direction, and the contact direction is the direction of a contact surface of the linear polarizer layer and the first phase difference film layer.

Illustratively, the reference direction may be perpendicular to the contact direction. Similarly, when the first groove is a blind groove, the horizontal extending direction of the first groove may also intersect with the contact direction.

Furthermore, the polarizer is a flexible polarizer, and the horizontal extending direction of the first groove is parallel to the direction of a bending line when the flexible polarizer is bent. That is, when the polarizer is a flexible polarizer, a bending line may be generated when the flexible polarizer is bent, and the first groove on the linear polarizer layer may penetrate through the linear polarizer layer in a direction parallel to the bending line.

The polarizer provided by the embodiment of the application can be applied to various structures, so that the position of the first groove on the polarizer can be determined according to the applied structure. For example, the polarizer may be attached to the display panel, and an orthogonal projection of the first groove on a plane where the surface of the display panel is located does not overlap with a surface of the light emitting region of the display panel. Thus, the light emitted by the light emitting area can be ensured to be processed by the polaroid, so that the light can be emitted in the form of circularly polarized light.

Optionally, the first phase difference film layer has a second groove, the second groove is filled with a second light-transmitting filling material, and an elastic modulus of the second light-transmitting filling material is smaller than an elastic modulus of the material of the first phase difference film layer. The first phase difference film layer is also provided with a second groove, and the second groove is filled with a second light-transmitting filling material, and the elastic modulus of the second light-transmitting filling material is smaller than that of the first phase difference film layer. Therefore, the average elastic modulus of the film layer where the first phase difference film layer is located is reduced, and the probability of breakage of the polarizer is further reduced.

Wherein, the second groove can also be a blind groove or a through groove. When the reference direction is crossed with the contact direction, and the contact direction is the direction of the contact surface of the linear polarizer layer and the first phase difference film layer, the second groove penetrates through the first phase difference film layer in the reference direction. And the second groove in the first phase difference film layer can penetrate through the first phase difference film layer along the direction of the bending line. At this time, the elastic modulus of the first phase difference film layer can be reduced to a greater extent, so that the bending force applied to the polarizer when the polarizer is bent is smaller, and the probability of breakage of the polarizer is further reduced.

Further, the polarizer further includes: one or more second phase difference film layers are sequentially laminated on one side, far away from the linear polarizer layer, of the first phase difference film layer, and orthographic projection of each second phase difference film layer on the plane where the surface of the linear polarizer layer is located covers the surface of the linear polarizer layer. For example, the first phase difference film layer may be a half-wave plate, and a second phase difference film layer adjacent to the first phase difference film layer may be a quarter-wave plate, and the second phase difference film layer may be used to enlarge the viewing angle of the polarizer.

And part or all of the one or more second phase difference film layers are provided with third grooves, third transparent filling materials are filled in the third grooves, and the elastic modulus of the third transparent filling materials is smaller than that of the materials of the second phase difference film layers.

Similar to the effect of the first groove and the second groove, the second phase difference film layer has a third groove, and the elastic modulus of the third transparent filling material filled in the third groove is smaller than that of the second phase difference film layer, so that the average elastic modulus of the film layer where the second phase difference film layer is located is reduced, and the breakage probability of the polarizer is further reduced.

In the embodiment of the present application, the material of the linear polarizer layer, the first phase difference film layer and/or the second phase difference film layer may be a polymerizable liquid crystal material, and the elastic modulus of the polymerizable liquid crystal material is in a range of 3-10 GPa. Illustratively, the polymerizable liquid crystal material has an elastic modulus of 3GPa, 5GPa, or 10 GPa.

It should be noted that one or more of the first light-transmissive filling material, the second light-transmissive filling material, and the third light-transmissive filling material is a light-transmissive adhesive material. Wherein the thickness of the light-transmitting bonding material is equal to or greater than the depth of the groove filled with the light-transmitting bonding material. When the thickness of the light-transmissive adhesive material is greater than the depth of the groove filled therewith, the difference between the thickness of the light-transmissive adhesive material and the depth of the groove filled therewith may be less than or equal to 5 μm. Illustratively, the light-transmissive adhesive material is an ultraviolet-curable optical adhesive or a thermosetting optical adhesive, and the elastic modulus of the light-transmissive adhesive material is in the range of 0.1 to 10 MPa. Because the elastic modulus of the transparent bonding material is usually smaller than the elastic modulus of the materials of the linear polarizer layer, the first phase difference film layer and the second phase difference film layer, the average elastic modulus of the film layer where the linear polarizer layer is located, the film layer where the first phase difference film layer is located and the film layer where the second phase difference film layer is located are reduced, so that the bending force of the linear polarizer, the first phase difference film layer and the second phase difference film layer when the linear polarizer, the first phase difference film layer and the second phase difference film layer are bent is reduced, and the breakage probability of the polarizer is reduced.

In one implementation, the polarizer further includes: one or more second phase difference film layers are sequentially stacked on one side, far away from the linear polarizer layer, of the first phase difference film layer, one second phase difference film layer, close to the first phase difference film layer, of the one or more second phase difference film layers is provided with a third groove, in the plurality of second phase difference film layers, the second phase difference film layers arranged at intervals are provided with third grooves, and each third groove is filled with a light-transmitting bonding material.

For example, assume that the number of second phase difference modules is 2. The linear polarizer has a first groove, and a second retardation film layer adjacent to the first retardation film layer has a third groove. Wherein, the groove can be a through groove. Because set up logical groove on the rete that the interval set up, when filling non-light tight bonding material in this logical groove, this non-light tight bonding material can all bond with this logical groove place rete and two retes adjacent with this rete simultaneously, consequently, can guarantee bonding effect, and made things convenient for the laminating between the rete.

In the embodiment of the present application, when the pattern of the cross section of the light emitting region on the display panel (the cross section is perpendicular to the thickness direction of the display panel) is a mesh pattern, the polarizer is a mesh pattern, or the polarizer includes a plurality of sub-polarizers, and the plurality of sub-polarizers are distributed in an island shape.

In a second aspect, a display module is provided, which includes: a display panel and a polarizer as described in any of the above first aspects; the polaroid is positioned on the light-emitting side of the display panel, and the orthographic projection of the polaroid on the plane of the surface of the display panel covers the surface of the light-emitting area of the display panel.

For example, the orthographic projection of the polarizer on the plane of the surface of the display panel and the surface of the light emitting area of the display panel may coincide. For example, assuming that the width of a single pixel in a light emitting region in a certain direction is e, the width f of a functional region of a polarizer covering the pixel in the direction satisfies: f > e. The functional area of the polarizer refers to the overlapped linear polarizer, the first phase difference film layer and the second phase difference film layer part of the orthographic projection of the film layer in the polarizer on the plane of the surface of the display panel.

Optionally, the display module further includes: and the touch function film layer is positioned between the polaroid and the display panel. At this time, the display module is a touch display module. Illustratively, the touch function layer may include a TP conductive layer and an insulating layer. The TP conductive layer includes a plurality of laterally disposed touch driving lines Tx and a plurality of longitudinally disposed touch sensing lines Rx on the same layer. Wherein in one case, Tx is disconnected at the intersection with Rx, and the disconnected Tx is connected to Rx by a conductive bridge (e.g., a metal bridge connection) on top of Rx, with an insulating layer disposed between the conductive bridge and Rx.

The touch functional film layer may have a fourth groove, and the fourth groove may be a through groove or a blind groove. And a fourth light-transmitting filling material is filled in the fourth groove, and the elastic modulus of the fourth light-transmitting filling material is smaller than that of the material of the touch function film layer. Illustratively, the fourth light-transmissive filling material may be a light-transmissive adhesive material.

When this fourth recess is logical groove, this touch function rete can realize touch function module and polaroid and display panel's laminating through filling to the non-light tight adhesive material of fourth recess, need not to set up the optical cement layer between touch function module and display panel like this, just can make touch function module and display panel laminate. And an optical adhesive layer is not required to be arranged between the touch functional module and the polaroid, so that the touch functional module and the polaroid can be attached. Therefore, the thinning of the display module is realized, and the probability of breakage of the display module during bending is reduced.

Further, the display module assembly still includes: and the light shielding layer is positioned between the touch function film layer and the polaroid, and the orthographic projection of the light shielding layer on the plane where the surface of the display panel is positioned is not overlapped with the surface of the light emitting area of the display panel. Illustratively, the light-shielding layer may be a black photoresist layer. The light shielding layer can be used for absorbing ambient light incident from the outside of the display module.

Further, the display module assembly still includes: the flexible substrate is arranged on one side, far away from the display panel, of the polarizer and used for providing support for the film layer in the display module. Also, the flexible substrate may be used as a Thin Film Encapsulation (TFE) or a transparent cover plate. Wherein, the film packaging layer is used for blocking water and oxygen for the display module.

Illustratively, the linear polarizer layer, the first phase difference mode layer and the second phase difference mode layer in the polarizer are sequentially disposed in a direction close to the display panel. That is, the display module may include a linear polarizer layer, a first retardation film layer, a second retardation film layer, a light-shielding layer, a touch functional film layer, and a display panel, which are sequentially disposed on one side of the flexible substrate.

In one implementation mode, the display panel comprises a first electrode layer and a second electrode layer, and the first electrode layer and the second electrode layer are used for controlling the display panel to emit light; the second electrode layer is close to the polarizer relative to the first electrode layer, and comprises a plurality of second electrodes which are distributed in an island shape, or the second electrode layer is in a net shape. Wherein, the orthographic projection of the polaroid on the plane of the surface of the display panel covers the surface of the second electrode layer.

The second electrode layer is close to the polarizer relative to the first electrode layer, and therefore, the second electrode layer may be referred to as a top electrode layer, and correspondingly, the first electrode layer may be referred to as a bottom electrode layer. For example, the second electrode layer may be a cathode electrode layer, and the first electrode layer may be an anode electrode layer.

Illustratively, the second electrode layer may be a semi-transparent cathode layer. The display panel has a light emitting region and a non-light emitting region including an opening region (i.e., a light transmitting region) and a non-light transmitting region. The second electrode layer is in a net shape, and the second electrode layer covers the light emitting area, namely the mesh of the second electrode layer is an opening area of the display panel. Correspondingly, the polaroid is also in a net shape, and the groove of the polaroid is an opening area of the display panel.

In the embodiment of the present application, the display module with the patterned second electrode layer can be applied to a transparent display device. When the display module is applied to a transparent display device, in order to ensure high transmittance of the transparent display device, the non-light-emitting region in the display module is usually a transparent region, and therefore, the display module does not have a light-shielding layer.

And, because the open area of display module assembly is above-mentioned recess region, and all fill transparent material in the recess, this transparent material can be full transparent material or translucent material. Therefore, the transmittance of the opening area of the display device provided by the embodiment of the present application is high (for example, the transmittance may be greater than 90%).

In a third aspect, there is provided a display device including: the display module assembly of the second aspect, the non-display side of display module assembly is at least cladding to the casing.

The beneficial effect that technical scheme that this application provided brought includes at least:

according to the polarizer, the display module and the display device provided by the embodiment of the application, because the partial or all film layers in the linear polarizer layer, the first phase difference film layer and the one or more second phase difference film layers in the polarizer are provided with the grooves, the grooves are filled with the transparent filling material, and the elastic modulus of the transparent filling material is smaller than that of the material of the film layer where the grooves are located. Therefore, the average elastic modulus of part or all of the linear polarizer layer, the first phase difference film layer and the one or more second phase difference film layers is reduced, so that the bending force of the film layer during bending is reduced, the breakage probability of the polarizer is reduced, the breakage probability of the display module is reduced, and the breakage probability of the display device is further reduced.

Drawings

FIG. 1 is a schematic structural diagram of a conventional display module;

FIG. 2 is a schematic structural diagram of another conventional display module;

FIG. 3 is a schematic structural diagram of a polarizer according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of another polarizer provided in this embodiment of the present application;

FIG. 5 is a schematic structural diagram of another polarizer provided in this embodiment of the present application;

FIG. 6 is a schematic diagram of a linear polarizer layer according to an embodiment of the present disclosure;

FIG. 7 is a schematic diagram of another linear polarizer layer provided in embodiments of the present application;

FIG. 8 is a schematic structural diagram of a polarizer provided in an embodiment of the present application;

FIG. 9 is a schematic structural diagram of another polarizer provided in an embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram of another polarizer provided in this application;

FIG. 11 is a schematic structural diagram of another polarizer provided in an embodiment of the present disclosure;

FIG. 12 is a flowchart of a method for manufacturing a polarizer according to an embodiment of the present disclosure;

FIG. 13 is a schematic structural diagram illustrating a linear polarizer material layer formed on a transparent substrate according to an embodiment of the present disclosure;

FIG. 14 is a schematic structural diagram of a linear polarizer layer formed on a transparent substrate according to an embodiment of the present disclosure;

FIG. 15 is a schematic structural diagram illustrating a linear polarizer layer with a light-transmissive adhesive material applied in a first recess of the polarizer layer according to an embodiment of the present disclosure;

fig. 16 is a schematic structural diagram illustrating a first retardation film layer formed on one side of a linear polarizer layer according to an embodiment of the present disclosure;

fig. 17 is a schematic structural diagram illustrating a second retardation film layer formed on a side of the first retardation film layer away from the transparent substrate according to an embodiment of the present disclosure;

fig. 18 is a schematic structural diagram illustrating a structure of the second retardation film layer after a light-transmissive adhesive material is coated in the third groove;

fig. 19 is a schematic structural diagram of a display module according to an embodiment of the present disclosure;

fig. 20 is a schematic view illustrating an anti-reflection characteristic of a display module according to an embodiment of the disclosure;

fig. 21 is a schematic partial structure diagram of a display module according to an embodiment of the present disclosure;

fig. 22 is a flowchart illustrating a method for manufacturing a display module according to an embodiment of the present disclosure;

fig. 23 is a schematic structural diagram after a touch functional film layer is formed on a light emitting side of a display panel according to an embodiment of the present disclosure;

fig. 24 is a schematic structural diagram illustrating a touch functional film layer after a light-shielding layer is formed on a side of the touch functional film layer away from a display panel according to an embodiment of the present disclosure;

fig. 25 is a schematic structural view illustrating a light-transmitting adhesive material coated on one side of a light-shielding layer according to an embodiment of the present disclosure;

fig. 26 is a schematic structural diagram illustrating a polarizer formed on a side of the light-shielding layer away from the display panel according to an embodiment of the present disclosure.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

With the development of communication technology, flexible display devices become display devices with great application prospects in the current display field due to the characteristics of variable and foldable flexible display devices. The flexible display device is generally provided with a flexible display module to realize a display function. The flexible display module may be an organic light-emitting diode (OLED) display module.

For the convenience of the reader, some theories related to the examples of the present application are described below:

the thickness of the display module is positively correlated with the bending force applied to the display module during bending.

Bending strain:

wherein y is the distance from the surface of the film layer to the neutral layer, and the distance is positively correlated with the thickness of the film layer. The neutral layer refers to a fault of the film layer which is hardly subjected to bending force in the bending process, and the stress of the fault is almost zero. ρ is the bend radius. According to the formula of the bending strain, when the bending radius ρ is a constant value, the distance y is proportional to the bending strain, and the film thickness is further positively correlated to the bending strain. And the larger the bending strain of the film layer is, the larger the bending stress of the film layer is, the bending stress (the bending stress can refer toTensile or compressive forces). Therefore, the thickness of the film is positively correlated to the bending force applied to the film, and accordingly, when the thickness of the film is reduced, the bending force applied to the film when the film is bent is reduced.

Modulus of elasticity E:

σ is the stress. As can be seen from the above equation for the bending strain and the equation for the elastic modulus, when the bending radius ρ and the distance y (film thickness) from the surface of the film to the neutral layer are constant values, the bending strain is constant values, and the elastic modulus E of the film is positively correlated with the stress σ. When the stress σ of the film layer is larger, the larger the bending force to which the film layer is subjected is. Therefore, the elastic modulus E is proportional to the bending force applied to the film, and accordingly, when the elastic modulus E of the film is decreased, the bending force applied to the film when the film is bent is decreased. Illustratively, the elastic modulus may be young's modulus.

Referring to fig. 1, a schematic structural diagram of a conventional display module 01 is shown. The conventional display module 01 includes: the display panel 011, touch screen 012, circular polaroid (polaroid for short) 013 and the transparent apron 014 that set up stack gradually, all laminate through optical cement layer 015 between these each structure. The Touch Panel (TP) 012 includes a touch electrode layer, the circular polarizer 013 includes a triacetyl cellulose (TAC) layer 0131, a polyvinyl alcohol (PVA) layer 0132, a first retardation film layer 0133, and a second retardation film layer 0134 sequentially stacked on the transparent cover plate, and the layers (except for between the TAC layer and the PVA layer) are bonded by an optical adhesive layer 015. The TAC layer 0131 is also called a protective film, and the PVA layer 0132 is also called a linear polarizer layer. For example, the first phase difference film layer 0133 may be a half wave plate, and the second phase difference film layer 0134 may be a quarter wave plate.

Because all adopt the optical cement to laminate between each structure to and between each rete, lead to this display module assembly's thickness to be thicker. For example, in the display module, the total thickness of the layers from the side of the display panel close to the transparent cover plate to the side of the transparent cover plate close to the display panel is about 100 micrometers (μm). The thickness of the display module is positively correlated with the bending force applied to the display module during bending, so that the display module is easy to break due to the large bending force applied to the display module during bending.

Referring to fig. 2, a schematic structural diagram of another conventional display module 02 is shown. This display module assembly 02 includes: the display panel 021, touch screen 022, circular polarizer (polarizer for short) 023 and transparent cover plate 024 that the setting is laminated in proper order. Wherein, circular polarizer 023 and touch screen 022 coat on transparent cover 024 in proper order. The circular polarizer 023 comprises a linear polarizer layer 0231 and a phase difference film layer (also called as an alignment film layer) 0232 which are sequentially coated on the transparent cover plate 024, and the materials of the linear polarizer layer 0231 and the phase difference film layer 0232 are coating type liquid crystal materials.

However, the coated liquid crystal material has a large elastic modulus (3 to 10 gigapascals (GPa)) and thus a display module has a large elastic modulus, and the display module is likely to be broken when bent.

Please refer to fig. 3, which shows a schematic structural diagram of a polarizer according to an embodiment of the present disclosure. The polarizer 11 includes: a linear polarizer layer 111, and a first retardation film layer 112 on the side of the linear polarizer layer 111.

The linear polarizer layer 111 has a first groove a1, and the first groove a1 is filled with a first light-transmissive filling material having an elastic modulus smaller than that of the material of the linear polarizer layer 111. For example, as shown in fig. 3, the first groove may be a through groove (i.e., a through hole), or, as shown in fig. 4, the first groove a1 may be a blind groove.

In addition, an orthographic projection of the first retardation film layer 112 on the plane of the surface of the linear polarizer layer 111 covers the surface of the linear polarizer layer 111. The first retardation film layer 112 is used to cooperate with the linear polarizer layer 111, so that the light passing through the first retardation film layer 112 and exiting from the linear polarizer layer 111 is circularly polarized light.

For example, an orthographic projection of the first retardation film layer 112 on the plane of the surface of the linear polarizer layer 111 may coincide with the surface of the linear polarizer layer 111. The light irradiated to the polarizer may sequentially pass through the first retardation film layer 112 and the linear polarizer layer 111, and may form circularly polarized light.

The first phase difference film layer 112 may be a single film layer, or may be a composite film layer formed of a plurality of phase difference films, and the composite film layer realizes the function of the first phase difference film layer 112 by the common action of the plurality of phase difference films.

The first light-transmitting filling material may be a light-transmitting adhesive material. Because the elastic modulus of the transparent bonding material is usually smaller than that of the material of the linear polarizer layer, the average elastic modulus of the film layer where the linear polarizer layer is located is reduced, so that the bending force of the polarizer during bending is reduced, and the breakage probability of the polarizer is reduced. Further, in the case that the first light-transmitting filling material is a light-transmitting adhesive material, the linear polarizer layer 111 and the first retardation film layer 112 may be attached by the light-transmitting adhesive material filled in the first groove a1, so that the linear polarizer layer 111 and the first retardation film layer 112 do not need to be attached by an optical adhesive layer, and the polarizer may be thinned.

Alternatively, as shown in fig. 3, when the first groove a1 is a through groove, the first groove a1 may penetrate the linear polarizer layer 111 in the reference direction x. The reference direction x may cross a contact direction y, which is a direction in which a contact surface of the linear polarizer layer 111 and the first retardation film layer 112 is located. Illustratively, the reference direction x may be perpendicular to the contact direction y. Similarly, when the first groove a1 is a blind groove, the horizontal extending direction of the first groove a1 can also intersect with the contact direction y.

Further, when the polarizer is a flexible polarizer, a bending line is generated when the flexible polarizer is bent, and the first groove a1 on the linear polarizer layer 111 may penetrate through the linear polarizer layer 111 in a direction parallel to the bending line. Therefore, the groove can disperse the elastic modulus of the linear polarizer layer to a greater extent, so that the average elastic modulus of the film where the linear polarizer layer is located is reduced to a greater extent, the bending force of the linear polarizer layer is smaller when the linear polarizer layer is subjected to the bending force, and the probability of polarizer fracture is further reduced.

The polarizer provided by the embodiment of the application can be applied to various structures, so that the position of the first groove on the polarizer can be determined according to the applied structure. For example, as shown in fig. 5, the polarizer 11 may be attached on the display panel 12. At this time, the position of the first groove a1 on the linear polarizer layer 111 of the polarizer 11 may satisfy: the orthographic projection of the first groove a1 on the plane of the surface of the display panel 12 does not overlap with the surface of the light emitting area (i.e. the light emitting pixel area) B of the display panel 12, so as to ensure that the light emitted from the light emitting area B can pass through the polarizer 11, and then be emitted in the form of circularly polarized light.

In general, when a cross section of the light emitting region B on the display panel 12 (the cross section is perpendicular to the thickness direction of the display panel 12) is in a mesh pattern, accordingly, as shown in fig. 6, the linear polarizer layer 111 may be in a mesh pattern. Alternatively, when the cross section of the light emitting region B on the display panel 12 is in an island shape, as shown in fig. 7, the linear polarizer layer 111 may include a plurality of sub-polarizers, and the sub-polarizers are in an island shape.

Alternatively, as shown in fig. 8, the first retardation film layer 112 may have a second groove a2, and the second groove a2 is filled with a second light-transmitting filling material, and the elastic modulus of the second light-transmitting filling material is smaller than that of the material of the first retardation film layer. The first phase difference film layer is also provided with a second groove, and the second groove is filled with a second light-transmitting filling material, and the elastic modulus of the second light-transmitting filling material is smaller than that of the first phase difference film layer. Therefore, the average elastic modulus of the film layer where the first phase difference film layer is located is reduced, and the probability of breakage of the polarizer is further reduced.

Also, the second recess a2 may be a blind groove or a through groove. Since the light needs to pass through the linear polarizer layer and the first retardation film layer simultaneously to form circularly polarized light, the orthographic projection of the second groove a2 on the plane where the surface of the display panel 12 is located may not overlap the surface of the light emitting region (i.e., the light emitting pixel region) B of the display panel 12, so as to ensure that the light emitted from the light emitting region B can be processed by the polarizer 11, and then emitted in the form of circularly polarized light. For example, the position of the second groove a2 projected on the line-polarizer layer 111 may coincide with the position of the first groove a1 on the line-polarizer layer 111. When the second grooves a2 in the first retardation film layer 112 are through grooves, the second grooves a2 may penetrate through the first retardation film layer 112 in a reference direction x, which intersects with a contact direction y, which is a direction y in which a contact surface of the linear polarizer layer 111 and the first retardation film layer 112 is located.

The second grooves a2 in the first retardation film 112 may also penetrate through the first retardation film 112 in the direction along the bending line. At this time, the elastic modulus of the first phase difference film layer can be reduced to a greater extent, so that the bending force applied to the polarizer when the polarizer is bent is smaller, and the probability of breakage of the polarizer is further reduced.

It should be noted that when the second grooves a2 in the first retardation film 112 are blind grooves, the orthographic projection of the first retardation film 112 on the plane of the surface of the linear polarizer layer 111 can cover the surface of the linear polarizer layer 111. Therefore, in the case of ensuring that the light passing through the first retardation film layer 112 and exiting from the linear polarizer layer 111 is circularly polarized light, the position of the projection of the second groove a2 on the linear polarizer layer 111 may not coincide with the position of the first groove a1 on the linear polarizer layer 111.

Further, as shown in fig. 9, the polarizer 11 may further include: one or more second phase difference film layers 113 are sequentially laminated on the first phase difference film layer 112 on the side away from the linear polarizer layer 111. An orthographic projection of each second phase difference film layer 113 on a plane where the surface of the linear polarizer layer 111 is located may cover the surface of the linear polarizer layer 111. For example, the first phase difference film 112 may be a half-wave plate, and a second phase difference film 113 adjacent to the first phase difference film 112 may be a quarter-wave plate, and the second phase difference film 113 may be used to enlarge the viewing angle of the polarizer. For example, when the number of the second phase difference film layers 113 is 1, the second phase difference film layers 113 are disposed on the side of the first phase difference film layers 112 away from the linear polarizer layer 111. When the number of the second phase difference film layers 113 is 3, the three second phase difference film layers 113 are sequentially stacked and disposed on the side of the first phase difference film layer 112 away from the linear polarizer layer 111. An orthographic projection of each second phase difference film layer 113 on the plane of the surface of the linear polarizer layer 111 coincides with the surface of the linear polarizer layer 111. It should be noted that fig. 9 only shows a case where the polarizer 11 includes one second phase difference film layer 113, and an orthographic projection of the one second phase difference film layer 113 on the plane where the surface of the linear polarizer layer 111 is located coincides with the surface of the linear polarizer layer 111.

And part or all of the one or more second phase difference film layers 113 have a third groove a3, and the third groove a3 is filled with a third light-transmitting filling material, and the elastic modulus of the third light-transmitting filling material is smaller than that of the material of the second phase difference film layers. For example, it is assumed that the polarizer 11 includes four second phase difference film layers 113. The four second phase difference film layers 113 may each have a third groove a 3. Alternatively, two of the four second phase difference film layers 113 have the third groove a3, and the other two second phase difference film layers 113 do not have the third groove a 3.

Similar to the effect of the first groove a1 and the second groove a2, since the second phase difference film layer has the third groove, and the elastic modulus of the third light-transmitting filling material filled in the third groove is smaller than the elastic modulus of the material of the second phase difference film layer, the average elastic modulus of the film layer where the second phase difference film layer is located is reduced, and the fracture probability of the polarizer is further reduced.

In the embodiment of the present application, the materials of the linear polarizer layer 111, the first phase difference film layer 112 and/or the second phase difference film layer 113 may be a polymerizable liquid crystal material, and the elastic modulus of the polymerizable liquid crystal material is in a range of 3-10 GPa. Illustratively, the polymerizable liquid crystal material has an elastic modulus of 3GPa, 5GPa, or 10 GPa.

Optionally, one or more of the first light-transmissive filling material, the second light-transmissive filling material, and the third light-transmissive filling material may be a light-transmissive adhesive material. Wherein the thickness of the light-transmitting bonding material is equal to or greater than the depth of the groove filled with the light-transmitting bonding material. When the thickness of the light-transmissive adhesive material is greater than the depth of the groove filled therewith, the difference between the thickness of the light-transmissive adhesive material and the depth of the groove filled therewith may be less than or equal to 5 μm. Illustratively, the light-transmissive adhesive material is an ultraviolet-curable optical adhesive or a thermosetting optical adhesive, and the elastic modulus of the light-transmissive adhesive material is in the range of 0.1 to 10 MPa. Because the elastic modulus of the transparent bonding material is usually smaller than the elastic modulus of the materials of the linear polarizer layer, the first phase difference film layer and the second phase difference film layer, the average elastic modulus of the film layer where the linear polarizer layer is located, the film layer where the first phase difference film layer is located and the film layer where the second phase difference film layer is located is reduced, so that the bending force of the polarizer, the first phase difference film layer and the second phase difference film layer when the polarizer, the first phase difference film layer and the second phase difference film layer are bent is reduced, and the probability of fracture of the polarizer is reduced.

In the embodiment of the present application, one or more second phase difference film layers 113 stacked on the first phase difference film layer 112 on the side away from the linear polarizer layer 111 are sequentially stacked, one second phase difference film layer 113 of the one or more second phase difference film layers 113 close to the first phase difference film layer 112 has a third groove a3, and of the plurality of second phase difference film layers 113, the second phase difference film layers 113 arranged at intervals have a third groove a3, and each third groove a3 is filled with a light-transmitting adhesive material.

That is, among the linearly polarizer layer 111, the first retardation film layer 112, and the one or more second retardation film layers 113 stacked one on another, grooves may be formed in the alternately disposed film layers. For example, referring to fig. 9, it is assumed that the number of the second phase difference modules 113 is 1. The linear polarizer 111 has a first groove a1, and a second retardation film 113 adjacent to the first retardation film 112 has a third groove a 3. Wherein, the groove can be a through groove. Because set up logical groove on the rete that the interval set up, when filling non-light tight bonding material in this logical groove, this non-light tight bonding material can all bond with this logical groove place rete and two retes adjacent with this rete simultaneously, consequently, can guarantee bonding effect, and made things convenient for the laminating between the rete.

Illustratively, as shown in fig. 9, the polarizer 11 includes a linear polarizer layer 111, a first retardation film layer 112, and a second retardation film layer 113, which are stacked. The linear polarizer layer 111 and the second phase difference film layer 113 have through grooves filled with a light-transmissive adhesive material. The light-transmitting adhesive material filled in the through grooves of the linear polarizer layer 111 can bond the linear polarizer layer 111 and the first retardation film layer 112. The transparent adhesive material filled in the through groove of the second phase difference film layer 113 can realize the attachment of the first phase difference film layer 112 and the second phase difference film layer 113.

It should be noted that one or more of the first groove, the second groove and the third groove may be a blind groove or a through groove. Wherein, when one or more of the first groove, the second groove and/or the third groove are blind grooves, the openings of the first groove, the second groove and/or the third groove may face the same direction in the case that the first groove, the second groove and/or the third groove are filled with the light-transmitting adhesive material. For example, as shown in fig. 10, when the first, second, and third grooves are all blind grooves, the openings of the first, second, and third grooves may all face the same direction, and at this time, the linear polarizer layer 111 may be attached to the first retardation film layer 111 through the light-transmissive adhesive material filled in the second groove a2 of the first retardation film layer 112. The first retardation film 112 may be attached to the second retardation film 111 by a transparent adhesive material filled in the third groove a3 of the second retardation film 113. The openings of the first, second and/or third grooves may also face in different directions. As shown in fig. 11, fig. 11 illustrates a case where the polarizer includes a linear polarizer layer 111 and a first retardation film layer 112, and the linear polarizer layer 111 has first grooves a 1. When the first groove a1 is a blind groove, in the first groove a1 of the linear polarizer layer 111, the opening of a part of the first groove a1 faces the direction of the first retardation film 112; the other part of the first grooves a1 opens in a direction away from the first retardation film 112. Therefore, the linear polarizer layer 111 and the first phase difference film layer 112 can be attached without using optical glue, and the thinning of the polarizer is facilitated.

Because all can fill non-light tight adhesive material in above-mentioned first recess, second recess and/or the third recess, so not only can reduce the average elastic modulus of this recess place rete, can also be through filling non-light tight adhesive material to the recess for this recess place rete is laminated with other rete, need use the optical cement layer to laminate like this for among the correlation technique, the polaroid in the embodiment of this application has reduced the optical cement layer, and then has reduced the whole thickness of this polaroid, realize the attenuate to the polaroid. And because the thickness of the polaroid is reduced, the bending force borne by the polaroid during bending is reduced, and the breakage probability of the polaroid is further reduced.

In the polarizer provided in the embodiment of the present application, when the pattern of the cross section of the light emitting region B on the display panel 12 (the cross section is perpendicular to the thickness direction of the display panel 12) is a mesh pattern, the polarizer may be a mesh pattern. Alternatively, when the cross section of the light emitting region B on the display panel 12 is distributed in an island shape, the polarizer may include a plurality of sub-polarizers, and the sub-polarizers are distributed in an island shape. The orthographic projection of the polarizer on the plane of the surface of the display panel 12 may coincide with the light emitting area B of the display panel 12.

It is worth noting that in the polarizer provided in the embodiment of the present application, in a case that the area of the cross section of the first groove accounts for 50% of the area of the cross section of the linear polarizer layer, the average elastic modulus of the linear polarizer layer may be reduced by 50%, and then, under the same bending radius, the stress and the bending strain of the linear polarizer layer may be reduced by 50%. The cross section of the first groove and the cross section of the linear polarizer layer are parallel to the contact direction. Similarly, in the case that the area of the cross section of the third groove also occupies 50% of the area of the cross section of the second phase difference film layer, the average elastic modulus of the second phase difference film layer may be reduced by 50% at the same bending radius, and then the stress and the bending strain of the second phase difference film layer may be reduced by 50% at the same bending radius.

In summary, in the polarizer provided in the embodiment of the present application, since the linear polarizer layer, the first retardation film layer, and some or all of the one or more second retardation film layers have the groove, and the groove is filled with the transparent filling material, an elastic modulus of the transparent filling material is smaller than an elastic modulus of a material of the film layer where the groove is located. Therefore, the average elastic modulus of part or all of the linear polarizer layer, the first phase difference film layer and the one or more second phase difference film layers is reduced, so that the bending force applied to the film layer during bending is reduced, and the breakage probability of the polarizer is reduced.

Please refer to fig. 12, which is a flowchart illustrating a method for manufacturing a polarizer according to an embodiment of the present disclosure, wherein the method can be used to manufacture a polarizer shown in any one of fig. 3 to 11. The following description will take an example in which the grooves of the polarizer are filled with a light-transmissive adhesive material. As shown in fig. 12, the method includes:

step 101, providing a transparent substrate.

For example, the transparent substrate may be a substrate made of polyethylene terephthalate (PET), or a substrate made of triacetyl cellulose (TAC), or may be a COP (cyclic olefin polymer, COP), a transparent polyimide (CPI) substrate of Hard Coating (HC), ultra-thin tempered glass, a composite polymer film, or the like.

Step 102, forming a linear polarizer layer on a transparent substrate, wherein the linear polarizer layer is provided with a first groove.

The first groove is filled with a first light-transmitting filling material, and the elastic modulus of the first light-transmitting filling material is smaller than that of the material of the linear polarizer layer. The first groove may penetrate through the linear polarizer layer in a reference direction, the reference direction intersects with a contact direction, and the contact direction is a direction in which a contact surface of the linear polarizer layer and the first retardation film layer is located. When the polarizer is a flexible polarizer, a bending line is generated when the flexible polarizer is bent, and the first groove of the linear polarizer can penetrate through the linear polarizer layer in a direction parallel to the bending line.

For example, forming a linear polarizer layer on a transparent substrate may include the steps of:

depositing a layer of linear polarization material on a transparent substrate by adopting a coating process to form a linear polarization material layer, and aligning the linear polarization material layer by adopting an alignment process to form a linear polarization sheet material layer.

Fig. 13 is a schematic structural diagram illustrating a linear polarizer material layer 1111 formed on a transparent substrate 00 according to an embodiment of the present disclosure. The coating process may include drop coating, knife coating, or printing, among others. The linearly polarizing material may be a liquid crystal solution doped with dichroic dye molecules, or PVA doped with dichroic dye molecules. Illustratively, the dichroic dye molecules include iodine and dichroic dyes. The dichroic dye may include red BR, red LR, red R, pink LB, magenta BL, purplish red GS, sky blue LG, lemon yellow, blue BR, blue 2R, dark blue RY, green LG, violet LB, violet B, Black H, Black B, Black GSP, yellow 3G, yellow R, Orange 3R, dark red GL, dark red KGL, congo red, bright violet BK, Supra blue G, Supra blue GL, direct sky blue, direct Fast Orange s (direct Fast Orange s) and Fast Black (Fast Black).

The alignment process (also called alignment method) can align a certain kind of material molecules along a certain direction to form a film layer. Wherein the material molecules have a polarizing effect, also referred to as a double absorption effect or dichroic effect. Double absorption or dichroism refers to optical anisotropy in which light absorption differs in two directions, i.e., an optical axis direction and a direction perpendicular thereto. The higher the alignment of the material molecules in a certain direction, the higher the double absorption ratio of the material.

The alignment process may include a photo-alignment process, a rubbing alignment process, or a photo-induced molecular rotation (PMR) process.

The process of the photo-alignment process may include: and irradiating the liquid crystal doped with the dichroic dye molecules by using specific light to ensure that the liquid crystal molecules and the dichroic dye molecules are arranged in a certain direction, and realizing crosslinking and curing of the liquid crystal molecules and the dichroic dye molecules after the liquid crystal molecules and the dichroic dye molecules are arranged in order to obtain the linear polarizer material layer. Herein, crosslinking and curing means that the branches of the polymer compound are linked together by a chemical reaction.

The rubbing alignment process may include: rubbing the surface of the linearly polarized material layer by using rubbing cloth to form grooves on the surface of the linearly polarized material layer, arranging linearly polarized material molecules along the grooves, and performing cross-linking and curing on the regularly arranged linearly polarized material molecules to obtain the linearly polarized material layer.

PMR is suitable for a film layer made of a linearly polarizing material made of a photo-alignment material (generally, a molecule having liquid crystal properties and rotatable upon irradiation of polarized light) doped with dichroic dye molecules. At this time, the process of PMR may include: the method comprises the steps of irradiating a ray polarization material layer with polarized light with a certain vibration direction, and enabling the photo-alignment molecules and dichroic dye molecules to rotate simultaneously after the polarized light is absorbed by the photo-alignment molecules in the ray polarization material until the arrangement direction of the photo-alignment molecules is perpendicular to the vibration direction of the polarized light. At this time, the photo-alignment molecules no longer absorb polarized light, and form molecules aligned in a certain direction, and the aligned molecules are cross-linked and cured to obtain the linear polarizer material layer.

And (2) processing the linear polarizer material layer through a one-step composition process to obtain a linear polarizer layer, wherein the linear polarizer layer is provided with a first groove.

Fig. 14 is a schematic diagram illustrating a structure of a linear polarizer layer 111 formed on a transparent substrate 00 according to an embodiment of the present disclosure. The patterning process may be implemented in various ways, and the following two examples are used as examples in this embodiment of the application.

The first implementation mode comprises the following steps: firstly, coating photoresist on a linear polarizer material layer which is crosslinked and cured to form a photoresist layer, then carrying out patterning treatment on the photoresist layer by adopting a yellow light process, wherein the patterned photoresist layer has a hollow-out region, then etching the linear polarizer material layer which is not covered by the photoresist layer by adopting an etching process (such as laser etching or solvent cleaning) to form a first groove, and then stripping the photoresist layer by a stripping process to obtain the linear polarizer layer with the first groove.

The implementation process of the yellow light process may include: and exposing the photoresist layer by using a mask plate to form a fully exposed area and a non-exposed area, and then, processing by using a developing process to completely remove the photoresist in the fully exposed area, wherein the photoresist in the non-exposed area is completely reserved, and the area where the photoresist is completely removed is a hollow area.

The second implementation mode comprises the following steps: the photomask is placed on one side of the linear polarizer material layer (namely, the linear polarizer material liquid film), and then a specific light source (a light source with the ability of inducing the polymerization of oriented molecules) is adopted to irradiate the side, where the photomask is placed, of the linear polarizer material layer, so that the part which is not shielded by the photomask is subjected to polymerization reaction under the irradiation of the light source, and the linear polarizer material layer shielded by the photomask is not subjected to polymerization reaction. And then, cleaning a part of the linear polarizer material layer which does not undergo polymerization reaction by using a solvent to remove the part of the linear polarizer material layer, so that a groove is formed on the linear polarizer material layer to obtain a patterned linear polarizer layer, and then removing the photomask. The photomask is also called a photomask (photomask) and a mask (mask).

And 103, coating a light-transmitting bonding material in the first groove of the line polarizer layer.

Fig. 15 is a schematic structural diagram illustrating a structure of a linear polarizer layer 111 according to an embodiment of the present disclosure after a light-transmissive adhesive material is coated in the first groove a 1. Here, a light-transmissive adhesive material may be coated on one side of the linear polarizer layer 111 using a coating process, and then the light-transmissive adhesive material may be filled in the first groove a1 through a leveling and low-pressure defoaming process. Illustratively, the light-transmissive adhesive material may be an ultraviolet curing optical glue or a heat curing optical glue, and the difference between the thickness of the light-transmissive adhesive material and the depth of the first groove a1 filled therein is less than or equal to 5 μm.

Step 104, forming a first phase difference film layer on one side of the line polarizer layer.

The orthographic projection of the first phase difference film layer on the plane where the surface of the linear polarizer layer is located can cover the surface of the linear polarizer layer, and the first phase difference film layer is used for being matched with the linear polarizer layer, so that light passing through the first phase difference film layer and exiting from the linear polarizer layer is circularly polarized light. The first phase difference mode layer may have a second groove or may not have a second groove. As shown in fig. 16, which shows a schematic structural diagram of a first retardation film layer 112 provided in an embodiment of the present application after forming the first retardation film layer 112 on one side of the line polarizer layer 111, the first retardation film layer 112 does not have the second groove.

The first retardation film 112 may be a finished retardation film (i.e., a retardation film prepared in advance), and the manufactured first retardation film 112 may be directly transferred to the side of the linear polarizer layer 111 coated with the transparent adhesive material. When the finished phase difference film layer is used to form an ultra-thin polarizer, the finished phase difference film layer may be a phase difference film made of liquid crystal (i.e., the finished phase difference film layer is a liquid crystal phase difference film layer), and the thickness of the liquid crystal phase difference film layer may be 500nm (nanometers) to 5 μm. When the finished phase difference film layer is used for forming a common polarizer, the finished phase difference film layer may be a phase difference film made of a polymer (i.e., the finished phase difference film is a polymer phase difference film). For example, the polymer retardation film may be made of PMMA, Polystyrene (PS), Polycarbonate (PC), a cyclic olefin resin, and/or the like, and the thickness of the polymer retardation film is generally greater than 20 μm.

When the first retardation film layer 112 is not a finished retardation film layer, the process of forming the first retardation film layer 112 on one side of the line polarizer layer 111 may include: a layer of the first retardation material is deposited on one side of the in-line polarizer layer 111 by a coating process to form a first retardation film layer 112.

It should be noted that, in the embodiments of the present application, the first retardation film layer is taken as an example of a film layer without the second groove. When the first retardation film is a film having a second groove, the second groove may be filled with a light-transmissive adhesive material. The second groove can penetrate through the first phase difference film layer in the reference direction, and the direction of the contact surface of the linear polarizer layer and the first phase difference film layer is crossed with the reference direction.

Also, when the first retardation film layer has the second groove, the process of forming the first retardation film layer 112 on one side of the line polarizer layer 111 may include: first, a layer of a first retardation material is deposited on one side of the in-line polarizer layer 111 using a coating process to form a first retardation material layer. Then, the first phase difference material layer is processed through a one-step patterning process, so that the first phase difference film layer 112 with the second groove is obtained.

And 105, forming a second phase difference film layer on one side, far away from the transparent substrate, of the first phase difference film layer, wherein the second phase difference film layer is provided with a third groove.

The orthographic projection of the second phase difference film layer on the plane where the surface of the linear polarizer layer is located can cover the surface of the linear polarizer layer. And a third light-transmitting filling material is filled in the third groove of the second phase difference film layer, and the elastic modulus of the third light-transmitting filling material is smaller than that of the material of the second phase difference film layer. The present application describes a process for manufacturing the second retardation film layer by taking an example of forming the second retardation film layer on the side of the first retardation film layer away from the transparent substrate. Fig. 17 is a schematic diagram illustrating a structure of the first phase difference film 112 after forming a second phase difference film 113 on a side of the first phase difference film 112 away from the transparent substrate 00, where the second phase difference film has a third groove. Wherein, the thickness of the second phase difference film layer can be 500nm-5 μm.

The process of forming a second phase difference film 113 on the side of the first phase difference film 112 away from the transparent substrate 00 may include: first, a layer of second phase difference material is deposited on the side of the first retardation film layer 112 away from the transparent substrate 00 by a coating process to form a second phase difference material layer. Then, the second phase difference material layer is processed through a one-step patterning process, so that the second phase difference film layer 113 is obtained.

Similarly to the first retardation film 112, the second retardation film may have a third groove or may not have the third groove. When the second phase difference film layer does not have the third groove, the process of forming one second phase difference film layer 113 on the side of the first phase difference film layer 112 away from the transparent substrate 00 may include: and depositing a layer of second phase difference material on the side, away from the transparent substrate 00, of the first phase difference film layer 112 by using a coating process to form a second phase difference film layer 113.

And 106, coating a light-transmitting bonding material in the third groove of the second phase difference film layer.

Fig. 18 is a schematic structural diagram illustrating a structure of the second phase difference film layer 113 after a light-transmitting adhesive material is coated in the third groove a3 according to an embodiment of the present application. The process of coating the light-transmissive adhesive material in the third groove a3 of the second phase difference film layer 113 may include: a light-transmitting adhesive material is coated on one side of the second retardation film layer 113 by a coating process, and then the light-transmitting adhesive material is filled in the third groove a3 by a flow-leveling and low-pressure defoaming process.

It should be noted that, since the structure formed after step 106 may not be used immediately, in order to prevent the transparent adhesive material coated in the third groove from being contaminated due to exposure, a protective film may be attached to one side of the second phase difference film layer coated with the transparent adhesive material, where the protective film is a release-type protective film, and the release-type protective film may be removed when the polarizer needs to be used.

Step 107, peeling off the transparent substrate.

At this time, the polarizer is manufactured, and the transparent substrate is peeled off.

It should be noted that, in the above embodiments of the manufacturing method, only the manufacturing method of the polarizer when the polarizer includes one second phase difference film layer is shown. When the polarizer comprises a plurality of second phase difference film layers. After the step 104 is performed, a plurality of second retardation film layers may be sequentially formed on the side of the first retardation film layer 112 away from the transparent substrate 00. In an example, the polarizer includes two second phase difference film layers, the second phase difference film layer close to the first phase difference film layer has a third groove, and the second phase difference film layer far from the first phase difference film layer does not have the third groove. After the above step 104 is performed, the

above steps

105 and 106 can be continued. And then, continuously forming a second phase difference film layer without the third groove on the side, far away from the transparent substrate 00, of the second phase difference film layer with the third groove. And the process of forming the second phase difference film layer without the third groove on the side of the second phase difference film layer with the third groove away from the transparent substrate 00 may include: and depositing a layer of second phase difference material on the side, away from the transparent substrate 00, of the second phase difference film layer with the third groove by using a coating process, so as to form a second phase difference film layer 113 without the third groove.

It should be noted that, when the light-transmitting filling material filled in the first groove of the linear polarizer layer, the second groove of the first retardation film 112, and/or the third groove of the second retardation film 113 has no adhesiveness, after each of the polarizer layers is formed, a light-transmitting adhesive material needs to be coated on one side of each of the polarizer layers to form a transparent adhesive layer, so as to attach the adjacent polarizer layers. The manufacturing process of the transparent adhesive layer may include: and depositing a layer of adhesive material on one side of any film layer of the polarizer, which is far away from the transparent substrate 00, by adopting a coating process to form a transparent adhesive layer.

It should be further noted that the order of the steps of the method for manufacturing a polarizer provided in the embodiment of the present application may be appropriately adjusted, and the steps may also be increased or decreased according to the situation.

In summary, in the polarizer manufacturing method provided in the embodiments of the present application, one or more of the linear polarizer layer, the first retardation film layer, and the one or more second retardation films in the formed polarizer have a groove, and the groove is filled with a transparent filling material, where an elastic modulus of the transparent filling material is smaller than an elastic modulus of a material of the film where the groove is located. Therefore, the average elastic modulus of one or more of the linear polarizer layer, the first phase difference film layer and the one or more second phase difference film layers is reduced, so that the bending force applied to the film layer during bending is reduced, and the breakage probability of the polarizer is reduced.

It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific structure of the polarizer manufactured by the above-described method for manufacturing a polarizer may be referred to in the foregoing embodiments, and the details of the embodiments of the present application are not repeated herein.

Please refer to fig. 19, which illustrates a schematic structural diagram of a display module according to an embodiment of the present application. This display module assembly includes: the display panel 12 and any one of the polarizers 11 provided in the above embodiments. The polarizer 11 is located on the light emitting side of the display panel 12, and the orthographic projection of the polarizer 11 on the plane of the surface of the display panel 12 covers the surface of the light emitting area B of the display panel 12.

For example, the orthographic projection of the polarizer 11 on the plane of the surface of the display panel 12 and the surface of the light emitting region B of the display panel 12 may coincide. For example, assuming that the width of a single pixel in a light emitting region in a certain direction is e, the width f of a functional region of a polarizer covering the pixel in the direction satisfies: f > e. The functional region of the polarizer 11 refers to a linear polarizer, a first retardation film layer, and a second retardation film layer portion, which are overlapped by orthographic projection of a film layer in the polarizer on the plane of the surface of the display panel 12.

Optionally, the display module may further include: and a touch functional film 13, wherein the touch functional film 13 is positioned between the polarizer 11 and the display panel 12. At this time, the display module is a touch display module. Illustratively, the touch function layer 13 may include a TP conductive layer and an insulating layer. The TP conductive layer includes a plurality of laterally disposed touch driving lines Tx and a plurality of longitudinally disposed touch sensing lines Rx on the same layer. Wherein in one case, Tx is disconnected at the intersection with Rx, and the disconnected Tx is connected to Rx by a conductive bridge (e.g., a metal bridge connection) on top of Rx, with an insulating layer disposed between the conductive bridge and Rx.

Further, the touch function layer 13 may further include: and an organic protective film disposed on a side of the TP conductive layer away from the display panel 12, the organic protective film being configured to protect the TP conductive layer from being damaged by collision with a film layer adjacent to the TP conductive layer. For example, the organic protective film may be a layer of polymethyl methacrylate (PMMA) material with a thickness of 1 μm, and PMMA is also called acryl and acryl.

Further, the touch function film layer 13 may have a fourth groove. An orthographic projection of the fourth groove on a plane where the surface of the TP conducting layer is located may not coincide with Tx, Rx and the conducting bridge. A fourth light-transmitting filling material can be filled in the fourth groove, and the elastic modulus of the fourth light-transmitting filling material is smaller than that of the material of the touch function film layer. Illustratively, the fourth light-transmissive filling material may be a light-transmissive adhesive material.

Optionally, the fourth groove may be a through groove or a blind groove. And, since the fourth groove may be filled with a transparent adhesive material. When the fourth groove is a through groove, the touch function module 13 can be attached to the polarizer 11 and the display panel 12 through the transparent adhesive material filled into the fourth groove, so that the touch function module 13 can be attached to the display panel 12 without arranging an optical adhesive layer between the touch function module 13 and the display panel 12. The touch functional module 13 and the polarizer 11 can be attached to each other without an optical adhesive layer being disposed between the touch functional module 13 and the polarizer 11. Therefore, the thinning of the display module is realized, and the probability of breakage of the display module during bending is reduced.

The touch function layer may be disposed in various ways, and on one hand, the touch function film layer 13 may be attached to the polarizer 11 and the display panel 12 through the transparent adhesive material filled in the fourth groove. On the other hand, the touch functional film layer 13 may also be directly coated on one side of the polarizer 11, that is, the touch functional layer 13 may be integrated on the polarizer 11. Alternatively, the touch function film layer 13 may be directly coated on the light emitting side of the display panel 12, that is, the touch function film layer 13 may be integrated on the display panel 12. When the touch function layer 13 integrated on the polarizer 11 needs to be attached to the display panel 12, the attachment to the display panel 12 may be achieved by a transparent adhesive material filled into the fourth groove. When the touch function layer 13 integrated on the display panel 12 needs to be attached to the polarizer 11, the attachment to the polarizer 11 may be achieved by a transparent adhesive material filled into the fourth groove.

In the related art, in the case that the touch functional layer 13 is integrally disposed, the optical adhesive is also required to be used for attaching the two surfaces of the touch functional layer 13, and in the embodiment of the present application, in the case that the touch functional layer 13 is integrally disposed on the polarizer 11, the touch functional layer 13 and the display panel 12 may be attached by using a transparent adhesive material filled into the fourth groove; or, under the condition that the touch function layer 13 is integrated on the display panel 12, the touch function layer 13 and the polarizer 11 can be attached by the transparent adhesive material filled into the fourth groove, so that the display module can be thinned, and the probability of fracture of the display module during bending is reduced.

Optionally, with continued reference to fig. 19, the display module may further include: and a light-shielding layer 14, which is also called a Black Matrix (BM). The light shielding layer 14 is located between the touch function film layer 13 and the polarizer 11, and an orthographic projection of the light shielding layer 14 on a plane where the surface of the display panel 12 is located does not overlap with the surface of a light emitting area of the display panel 12. That is, the orthographic projection of the light shielding layer 14 on the plane where the surface of the linear polarizer layer is located in the polarizer does not overlap with the surface of the linear polarizer layer. Alternatively, it can be understood that the orthographic projection of the light-shielding layer 14 on the plane of the surface of the linear polarizer layer in the polarizer covers the first groove in the linear polarizer layer. Illustratively, the orthographic projection of the light-shielding layer 14 on the plane of the surface of the display panel 12 coincides with the surface of the non-light-emitting area (i.e., the area other than the light-emitting area B) of the display panel 12. The light-shielding layer 14 may be a black photoresist layer. The light-shielding layer 14 can be used to absorb the ambient light incident from the outside of the display module.

Optionally, with continued reference to fig. 19, the display module further includes: and a flexible substrate 15, wherein the flexible substrate 15 is disposed on a side of the polarizer 11 away from the display panel 12, and the flexible substrate 15 is used for providing support for a film layer in a display module. Also, the flexible substrate 15 may be used as a Thin Film Encapsulation (TFE) or a transparent cover plate. Wherein, the film packaging layer is used for blocking water and oxygen for the display module.

Illustratively, as shown in fig. 20, a line polarizer layer 111, a first phase difference mode layer 112, and a second phase difference mode layer 113 in the polarizer 11 are sequentially disposed in a direction close to the display panel 12. That is, the display module may include a linear polarizer layer 111, a first retardation film layer 112, a second retardation film layer 113, a light-shielding layer 14, a touch function film layer 13, and a display panel 12, which are sequentially disposed on one side of the flexible substrate 15.

In order to prevent ambient light (i.e., natural light) from being irradiated to a film layer (e.g., a thin film transistor film layer) in the display panel to cause reflection, it is generally necessary to provide an anti-reflection layer on a side of the display panel close to the polarizer, so that the display module has an anti-reflection function to prevent the ambient light from being irradiated to the surface of the film layer (e.g., the thin film transistor film layer) with a higher reflectivity in the display panel to cause reflection. In the embodiment of the present application, the polarizer 11 and the light shielding layer 14 are disposed so that the display module has an anti-reflection characteristic.

As shown in fig. 20, when the ambient light O is incident from the side of the flexible substrate 15, a part of the ambient light O₁Irradiating on the polarizer 11, the ambient light irradiated on the polarizer 11 forms circularly polarized light after passing through the polarizer 11, the circularly polarized light irradiates on the reflective layer of the display panel 12, the reflective layer reflects the circularly polarized light, the reflected circularly polarized light forms polarized light perpendicular to the vibration direction of the original polarized light after passing through the second phase difference mode layer 113 and the first phase difference mode layer 112 in the polarizer 11 in sequence, and the polarized light perpendicular to the vibration direction of the original polarized light cannot pass through the linear polarizer layer 111 to be emitted from the display module, so that the display module has a good display quality and a good display qualityThe polarizer 11 achieves an anti-reflection effect, so that the display module has an anti-reflection characteristic.

With continued reference to FIG. 20, after incident from one side of the flexible substrate 15, another portion of the ambient light O₂When the light is irradiated onto the light-shielding layer 14, the ambient light irradiated onto the light-shielding layer 14 is absorbed by the light-shielding layer 14, so that the ambient light cannot pass through the light-shielding layer 14. Therefore, the light-shielding layer 14 achieves an anti-reflection effect, so that the display module has an anti-reflection characteristic.

Optionally, the display panel may include: a first electrode layer, a second electrode layer, and a light emitting layer between the first electrode layer and the second electrode layer. The first electrode layer and the second electrode layer are used for controlling the light emitting layer to emit light. The second electrode layer is close to the polarizer relative to the first electrode layer. The second electrode layer is close to the polarizer relative to the first electrode layer, and therefore, the second electrode layer may be referred to as a top electrode layer, and correspondingly, the first electrode layer may be referred to as a bottom electrode layer. For example, the second electrode layer may be a cathode electrode layer, and the first electrode layer may be an anode electrode layer.

In order to increase the aperture ratio of the display panel, the second electrode layer may be a patterned film layer. For example, the second electrode layer includes a plurality of second electrodes distributed in an island shape, or the second electrode layer is in a mesh pattern (that is, the second electrode layer is a patterned film layer). Because the second electrode layer is positioned in the luminous area of the display panel, the orthographic projection of the polaroid on the plane of the surface of the display panel covers the surface of the second electrode layer.

Illustratively, as shown in fig. 21, the second electrode layer may be a semi-transparent cathode layer. The display panel 12 has a light-emitting region B and a non-light-emitting region C including an opening region (i.e., a light-transmitting region) C1 and a non-light-transmitting region C2. The second electrode layer is in a mesh pattern, and the second electrode layer covers the light emitting region B, i.e. the mesh of the second electrode layer is the opening region C1 of the display panel.

Moreover, since the polarizer 11 also covers the light emitting region B of the display panel 12, the orthographic projection of the polarizer 11 on the plane of the surface of the display panel 12 covers the second electrode layer. When the second electrode layer is in a mesh pattern, correspondingly, the polarizer is also in a mesh pattern, and the groove of the polarizer is the opening area C1 of the display panel.

In the embodiment of the present application, the display module with the patterned second electrode layer can be applied to a transparent display device. When the display module is applied to a transparent display device, in order to ensure a high transmittance of the transparent display device, the non-light-emitting region C in the display module is usually a transparent region, and thus the display module does not have a light-shielding layer.

In the related art transparent display device, since the conventional polarizer is disposed in the transparent display device, and the orthographic projection of the conventional polarizer on the plane of the surface of the display panel generally coincides with the surface of the display panel, the transmittance of the conventional polarizer is generally low, for example, when the conventional polarizer projects and transmits light in the wavelength range of 400 nm and 800 nm, the transmittance of the conventional polarizer is only about 45%, and therefore, the transmittance of the opening area (i.e., the opening area of the display panel) of the transparent display device is also generally low. Wherein the transmittance refers to a ratio of radiant energy transmitted through the transparent display device to total radiant energy projected onto the transparent display device. The transmittance T of the transparent display device satisfies: t ═ S_C×T_C，S_CThe ratio of the area of the opening region to the cross-sectional area of the total transparent display device, T_CThe transmittance of the open area.

For example, when the resolution of the transparent display device is 100 pixels per inch (ppi), the transmittance of an opening area (of the display panel) in the transparent display device is 40%, and the area of the opening area accounts for 50% of the area of the cross section (the cross section is parallel to the contact direction) of the entire transparent display device, and the transmittance T of the transparent display device is 40% × 50% and 20%.

In the embodiment of the application, because the opening area of the display module is the area where the groove is located, and the groove is filled with the transparent material, the transparent material can be a full transparent material or a semitransparent material. Therefore, the transmittance of the opening area of the display device provided by the embodiment of the present application is high (for example, the transmittance may be greater than 90%). Still taking the above example as an example, assuming that the transmittance of the opening area is 90%, the transmittance T of the display device provided in the embodiment of the present application is 90% × 50% and 45%. The transmittance is doubled compared with that of the traditional transparent display device. Therefore, the display module provided by the embodiment of the application has higher transmittance.

In summary, in the display module provided in the embodiment of the present application, since one or more of the linear polarizer layer, the first retardation film layer, and the one or more second retardation films in the polarizer of the display module have the groove, and the groove is filled with the transparent filling material, the elastic modulus of the transparent filling material is smaller than the elastic modulus of the material of the film layer where the groove is located. Therefore, the average elastic modulus of one or more film layers in the linear polarizer layer, the first phase difference film layer and the one or more second phase difference film layers of the polarizer is reduced, so that the bending force applied to the film layer during bending is reduced, the breakage probability of the polarizer is reduced, and the breakage probability of the display module is also reduced.

Further, because in the polaroid of display module assembly, the line polarisation lamella can have first recess, and/or, first phase difference rete can have the second recess, and/or, the second phase difference rete can have three recesses, and the recess is filled with non-light tight adhesive material for the line polarisation lamella can pass through adhesive material and laminate with first phase difference rete, and first phase difference rete can pass through adhesive material and laminate with second phase difference rete. Therefore, the optical adhesive layer is not required to be used for adhering the line polarizer layer, the third phase difference film layer and the second phase difference film layer, the display module is thinned, and the probability of breakage of the display module is reduced.

Please refer to fig. 22, which is a flowchart illustrating a method for manufacturing a display module according to an embodiment of the present disclosure, wherein the method can be used to manufacture the display module shown in any one of fig. 19 to 21. The embodiment of the present application takes the integration of a touch functional film on a display panel as an example for description. As shown in fig. 22, the method includes:

step 201, forming a touch function film layer on one side of the light emitting side of the display panel.

Fig. 23 is a schematic structural diagram illustrating a touch functional film layer 13 formed on a light-emitting side of the display panel 12 according to an embodiment of the present disclosure. Wherein the touch functional layer 13 may have a thickness of 2 to 10 μm. And the touch function layer 13 may include a TP conductive layer and an insulating layer. The TP conductive layer includes a plurality of laterally disposed touch driving lines Tx and a plurality of longitudinally disposed touch sensing lines Rx on the same layer. Wherein in one case, Tx is disconnected at the intersection with Rx, and the disconnected Tx is connected to Rx by a conductive bridge (e.g., a metal bridge connection) on top of Rx, with an insulating layer disposed between the conductive bridge and Rx.

Further, the touch function layer 13 may further include: and an organic protective film disposed on a side of the TP conductive layer away from the display panel 12, the organic protective film being configured to protect the TP conductive layer from being damaged by collision with a film layer adjacent to the TP conductive layer. For example, the organic protective film may be a1 μm thick layer of PMMA material, also known as acryl and acryl.

For example, the process of forming the touch function film layer on the side of the light emitting side of the display panel may include:

and (1) depositing a layer of conductive material on the light emergent side of the display panel through magnetron sputtering or thermal evaporation and other processes to obtain a conductive material layer, and processing the conductive material layer through a one-step composition process to obtain the TP conductive layer.

And (2) depositing an insulating material on the side where the TP conducting layer is formed by adopting a coating process to obtain an insulating material layer, and processing the insulating material layer by adopting a composition process to obtain the insulating layer.

And (3) depositing a layer of conductive material on one side of the insulating layer, which is far away from the TP conductive layer, through magnetron sputtering or thermal evaporation and other processes to obtain a conductive material layer, and processing the conductive material layer through a one-step composition process to obtain a conductive bridge.

And (4) forming an organic protective film on the side of the insulating layer far away from the TP conducting layer by adopting a coating process.

It should be noted that the touch function film layer may also have a fourth groove, the fourth groove is filled with a fourth light-transmitting filling material, and an elastic modulus of the fourth light-transmitting filling material is smaller than an elastic modulus of the material of the touch function film layer. The fourth light-transmitting filling material is a light-transmitting bonding material. When the touch function film layer has the fourth groove, the process of forming the touch function film layer on the light emitting side of the display panel may further include:

and (5) processing the organic protective film through a one-time composition process to obtain the organic protective film with a fourth groove, and filling a light-transmitting bonding material in the fourth groove.

Step 202, forming a light shielding layer on one side of the touch function film layer far away from the display panel.

Fig. 24 is a schematic structural diagram illustrating a structure of the touch function film layer 13 after the light shielding layer 14 is formed on a side away from the display panel 12 according to an embodiment of the present application. The thickness of the light-shielding layer 14 may be less than 1 μm, and an orthographic projection of the light-shielding layer 14 on the plane of the surface of the display panel 12 may not overlap with the surface of the light-emitting region B of the display panel 12.

The process of forming the light shielding layer on the side of the touch function film layer far away from the display panel may include: firstly, a shading material layer is obtained by depositing the shading material on one side of the touch function film layer far away from the display panel through a coating process, and the shading material layer is processed through a composition process to obtain a shading layer.

Step 203, coating a light-transmitting adhesive material on one side of the light shielding layer.

Fig. 25 is a schematic structural diagram illustrating a structure of the light-shielding layer 14 coated with a light-transmitting adhesive according to an embodiment of the present disclosure. Since the orthographic projection of the light shielding layer 14 on the plane of the surface of the display panel 12 does not overlap with the surface of the light emitting region of the display panel 12. Therefore, the light-shielding layer 14 may be considered to have a groove whose orthographic projection on the plane of the surface of the display panel 12 coincides with the surface of the light-emitting region B of the display panel 12. The transparent conformable material may be filled in the groove. Accordingly, the process of applying the light-transmitting adhesive material on one side of the light-shielding layer may include:

a light-transmitting adhesive material is coated on one side of the light-shielding layer 14 by a coating process, and then the light-transmitting adhesive material is filled into the groove of the light-shielding layer 14 by a flow-leveling and low-pressure defoaming process.

It should be noted that, since the structure formed after the step 203 may not be used immediately, in order to prevent the light-shielding layer from being contaminated by the transparent adhesive material applied to one side of the light-shielding layer, a protective film may be attached to the light-shielding layer side to which the transparent adhesive material is applied, and the protective film may be a release-type protective film which can be removed when the structure formed after the step 203 needs to be used.

And step 204, forming a polarizer on one side of the light shielding layer far away from the display panel.

Fig. 26 is a schematic structural diagram illustrating a polarizer 11 formed on a side of the light-shielding layer 14 away from the display panel 12 according to an embodiment of the present application. The orthographic projection of the polarizer 11 on the plane of the surface of the display panel 12 can cover the surface of the light emitting area B of the display panel 12. In this embodiment, the polarizer 11 provided in the above embodiments may be aligned and attached to the side of the light shielding layer 14 away from the display panel 12.

The polarizer 11 may be aligned and attached on the side of the light shielding layer 14 away from the display panel 12 by using a high-precision alignment and attachment device. Wherein, this high accuracy counterpoint laminating equipment's counterpoint precision error Δ H can be: delta H is more than or equal to minus 2 mu m and less than or equal to 2 mu m. It may be required that the difference between the width f of the functional region of the polarizer and the width e of a single pixel in a certain direction is less than or equal to 2 μm, thereby compensating for the above-mentioned accuracy error. For example, the high-precision alignment and bonding equipment may be an optical automatic alignment and bonding equipment. The process of performing alignment and bonding by using the optical automatic alignment and bonding device may include:

first, the protective film on the side of the light shielding layer away from the display panel and the protective film in the polarizer are removed in a vacuum chamber (chamber). And aligning the side of the display module with the protective film removed with the side of the polarizer with the protective film removed. And then, the aligned display module and the polarizer are turned over by a turning over mechanism (turn over stage), so that the side of the polarizer, from which the protective film is removed, is relatively attached to the side of the display module, from which the protective film is removed. And then, curing the light-transmitting bonding material in the groove of the light shielding layer by adopting ultraviolet illumination or a heating mode (the heating temperature is not higher than 85 ℃), so that one side of the light shielding layer, which is far away from the display panel, is bonded with the polaroid into a whole.

It should be noted that the alignment lamination may be performed by relatively laminating the structure formed after step 203 and the polarizer according to the first alignment mark and the second alignment mark, so that the functional region of the polarizer may correspond to the light emitting regions of the display panel in the display module one to one, and the light shielding layer corresponds to the non-light emitting regions of the display panel in the display module one to one.

The first alignment mark may refer to an opaque conductive layer pattern formed on an exposed side of the structure formed after step 203. The orthographic projection of the non-light-transmitting conductive layer pattern on the plane of the surface of the display panel can be positioned on the surface of the non-light-emitting area of the display panel. The second alignment mark may refer to a linear polarizing layer pattern formed on an exposed side of the polarizer. The linear polarizing layer pattern may be located in a non-functional region of the polarizer.

It should be noted that the transparent substrate used in the polarizer manufacturing process may be a flexible substrate, and therefore, the step 107 may not be performed in the polarizer manufacturing process. When the transparent substrate is a flexible substrate, the whole display module is manufactured after alignment and lamination of the polarizer and the touch functional layer are completed.

It should be noted that the touch functional layer may also be integrated on the polarizer, and when the touch functional layer is integrated on the polarizer, the step 201 may be referred to in the manufacturing process of the touch functional layer, which is not described in detail in this embodiment of the application. And when the touch function layer is a finished touch screen, the finished touch screen can be respectively attached to the polarizer 11 and the display panel 12 through a transparent adhesive material.

It should be further noted that the display panel may include: a first electrode layer, a second electrode layer, and a light emitting layer between the first electrode layer and the second electrode layer. The first electrode layer and the second electrode layer are used for controlling the light emitting layer to emit light. The first electrode layer and the second electrode layer are used for controlling the light emitting layer to emit light. The second electrode layer is close to the polarizer relative to the first electrode layer. The second electrode layer comprises a plurality of second electrodes which are distributed in an island shape, or the second electrode layer is in a net shape. Correspondingly, the orthographic projection of the polaroid on the plane of the surface of the display panel covers the surface of the second electrode layer.

In summary, in the manufacturing method of the display module provided in the embodiment of the present application, since one or more of the linear polarizer layer, the first retardation film layer, and the one or more second retardation films in the polarizer of the formed display module have the groove, and the groove is filled with the transparent filling material, an elastic modulus of the transparent filling material is smaller than an elastic modulus of a material of the film where the groove is located. Therefore, the average elastic modulus of one or more film layers in the linear polarizer layer, the first phase difference film layer and the one or more second phase difference film layers of the polarizer is reduced, so that the bending force applied to the film layer during bending is reduced, the breakage probability of the polarizer is reduced, and the breakage probability of the display module is also reduced.

Further, because in the polaroid of display module assembly, the line polarisation lamella can have first recess, and/or, first phase difference rete can have the second recess, and/or, the second phase difference rete can have three recesses, and the recess is filled with non-light tight adhesive material for the line polarisation lamella can pass through adhesive material and laminate with first phase difference rete, and first phase difference rete can pass through adhesive material and laminate with second phase difference rete. Therefore, the optical adhesive layer is not required to be used for adhering the line polarizer layer, the third phase difference film layer and the second phase difference film layer, the display module is thinned, and the probability of breakage of the display module is reduced. For example, in the embodiments of the present application, the distance between the display panel and the flexible substrate is less than 20 μm.

It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific structure of the display module manufactured by the above-described method for manufacturing a display module may be referred to, and the detailed description of the embodiment of the present application is omitted here.

An embodiment of the present application provides a display device, which may include: the shell and any one of the display modules provided by the embodiments, wherein the shell at least covers the non-display side of the display module.

Optionally, the display device may further include: the power supply assembly is configured to supply power to the display panel in the display module. The power supply assembly may include a power input port connected to an external power source, and/or a power supply battery. When the power supply assembly includes a power input port, the power input port may be disposed at a side of the display module, and the power input port may be a Universal Serial Bus (USB) interface. When the power supply assembly includes a power supply battery, the power supply battery may be disposed on a back surface of one of the sub-supporting plates (i.e., a surface far from the display panel on which the image is displayed), and the power supply battery may be a lithium battery.

The display device provided by the embodiment of the application can be a flexible display device, and the flexible display device can be: products or components such as electronic maps, electronic paper, mobile phones, tablet computers, displays, notebook computers, or wearable devices. The flexible display device is also applicable to any product or component having a foldable display function. The display device provided by the embodiment of the application can also be a transparent display device, and the transparent display device can be a transparent show window display screen and the like.

It should be noted that the terms "first" and "second" are used herein for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The term "and/or" in this application is only one kind of association relationship describing the associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A polarizer, comprising: the optical film comprises a linear polarizer layer and a first phase difference film layer positioned on one side of the linear polarizer layer;

the linear polarizer layer is provided with a first groove, a first light-transmitting filling material is filled in the first groove, and the elastic modulus of the first light-transmitting filling material is smaller than that of the material of the linear polarizer layer;

the orthographic projection of the first phase difference film layer on the plane where the surface of the linear polarizer layer is located covers the surface of the linear polarizer layer, and the first phase difference film layer is used for being matched with the linear polarizer layer, so that light passing through the first phase difference film layer and emitted from the linear polarizer layer is circularly polarized light.

2. The polarizer according to claim 1, wherein the first groove penetrates the linear polarizer layer in a reference direction, the reference direction crossing a contact direction in which a contact surface of the linear polarizer layer with the first retardation film layer is located.

3. The polarizer of claim 1, wherein the polarizer is a flexible polarizer, and the horizontal extension direction of the first groove is parallel to the direction of a bending line of the flexible polarizer when the flexible polarizer is bent.

4. The polarizer of any of claims 1 to 3, wherein the polarizer is used for being attached to a display panel, and an orthographic projection of the first groove on a plane where the surface of the display panel is located does not overlap with the surface of a light emitting area of the display panel.

5. The polarizer of any of claims 1 to 3 wherein the first light transmissive filling material is a light transmissive adhesive material.

6. The polarizer according to any of claims 1 to 3, wherein the first retardation film layer has a second groove filled with a second light-transmitting filling material having an elastic modulus smaller than that of the material of the first retardation film layer.

7. The polarizer according to claim 6, wherein the second groove penetrates the first retardation film layer in the reference direction when the reference direction crosses the contact direction, and the contact direction is a direction in which a contact surface of the linear polarizer layer with the first retardation film layer is located.

8. The polarizer of claim 6 wherein the second light transmissive filling material is a light transmissive adhesive material.

9. The polarizer of any of claims 1 to 3, further comprising: one or more second phase difference film layers are sequentially laminated on one side, far away from the linear polarizer layer, of the first phase difference film layer, and the orthographic projection of each second phase difference film layer on the plane where the surface of the linear polarizer layer is located covers the surface of the linear polarizer layer.

10. The polarizer according to claim 9, wherein some or all of the one or more second phase difference film layers have a third groove filled with a third light-transmitting filling material having an elastic modulus smaller than that of the material of the second phase difference film layer.

11. The polarizer of claim 10 wherein the third light transmissive filling material is a light transmissive adhesive material.

12. The polarizer of any of claims 1 to 3, further comprising: one or more second phase difference film layers are sequentially laminated on one side, far away from the linear polarizer layer, of the first phase difference film layers, one second phase difference film layer, close to the first phase difference film layer, of the one or more second phase difference film layers is provided with a third groove, in the second phase difference film layers, the second phase difference film layers arranged at intervals are provided with the third grooves, and each third groove is filled with a light-transmitting bonding material.

13. The polarizer of any of claims 1 to 3, wherein the polarizer is in a mesh pattern, or wherein the polarizer comprises a plurality of sub-polarizers, wherein the plurality of sub-polarizers are distributed in an island shape.

14. The utility model provides a display module assembly, its characterized in that, display module assembly includes: a display panel and the polarizer of any one of claims 1 to 13;

the polaroid is located on the light emitting side of the display panel, and the orthographic projection of the polaroid on the plane where the surface of the display panel is located covers the surface of the light emitting area of the display panel.

15. The display module assembly of claim 14, wherein the display module assembly further comprises: and the touch function film layer is positioned between the polaroid and the display panel.

16. The display module according to claim 15, wherein the touch functional film layer has a fourth groove filled with a fourth light-transmissive filling material, and an elastic modulus of the fourth light-transmissive filling material is smaller than an elastic modulus of a material of the touch functional film layer.

17. The display module of claim 16, wherein the fourth light-transmissive filling material is a light-transmissive adhesive material.

18. The display module according to any one of claims 14 to 17, wherein the display panel comprises a first electrode layer and a second electrode layer, and the first electrode layer and the second electrode layer are used for controlling the display panel to emit light;

the second electrode layer is close to the polaroid relative to the first electrode layer, the second electrode layer comprises a plurality of second electrodes, and the plurality of second electrodes are distributed in an island shape, or the second electrode layer is in a net shape.

19. The display module of claim 18, wherein an orthographic projection of the polarizer on a plane of the surface of the display panel covers the surface of the second electrode layer.

20. The display module according to any one of claims 15 to 17, wherein the display module further comprises:

the light shielding layer is located between the touch function film layer and the polarizer, and the orthographic projection of the light shielding layer on the plane where the surface of the display panel is located is not overlapped with the surface of the light emitting area of the display panel.

21. A display device, characterized in that the display device comprises: a housing and the display module of any of claims 14-20, the housing encasing at least a non-display side of the display module.