CN211454015U - Polaroid, display module and display device - Google Patents

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

Polarizer, display module and display device

technical field

The present application relates to the field of display technology, and in particular, to a polarizer, a display module and a display device.

Background technique

With the advancement of display technology, flexible display devices have become a display device with great application prospects in the current display field due to their deformable and foldable characteristics. The flexible display device generally includes: a display panel, a touch electrode layer, a polarizer and a transparent cover plate.

In the related art, the polarizer includes a linear polarizer layer and a retardation mode layer laminated on a transparent cover plate, and the materials of the retardation mode layer and the linear polarizer layer are coated liquid crystal materials.

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

Utility model content

The present application provides a polarizer, a display module and a display device, which can solve the problem that the display device is easily broken in the related art. The technical solutions are as follows:

In a first aspect, a polarizer is provided. The polarizer includes: a linear polarizer layer and a first retardation film layer on one side of the linear polarizer layer. The linear polarizer layer has 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 orthographic projection of the first retardation film layer on the plane where the surface of the linear polarizer layer is located, covering the surface of the linear polarizer layer, the first retardation film layer is used to cooperate with the linear polarizer layer, so that the first retardation film layer passes through the And the light emitted from the linear polarizer layer is circularly polarized light.

In the polarizer provided by the embodiments of the present application, since the linear polarizer layer in the polarizer has a first groove, the elastic modulus of the first light-transmitting filling material filled in the first groove is smaller than the elasticity of the material of the linear polarizer layer. Therefore, the average elastic modulus of the film layer where the linear polarizer layer is located is reduced, thereby reducing the bending force received by the polarizer during bending, and reducing the probability of the polarizer breaking.

Wherein, the first light-transmitting filling material may be a light-transmitting adhesive material. Since the elastic modulus of the light-transmitting adhesive material is usually smaller than the elastic modulus 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, thereby reducing the bending of the polarizer. The bending force received during folding reduces the probability of polarizer breakage. Further, in the case where the first light-transmitting filling material is a light-transmitting adhesive material, the linear polarizer layer and the first retardation film layer can be pasted together through the light-transmitting adhesive material filled into the first groove. , so that there is no need to use an optical adhesive layer to bond the linear polarizer layer and the first retardation film layer, thereby realizing the thinning of the polarizer.

Optionally, the first groove in the linear polarizer layer may be a through groove (that is, a through hole) or a blind groove. When the first groove is a through groove, the first groove penetrates the linear polarizer layer in a reference direction, the reference direction intersects with the contact direction, and the contact direction is the contact direction between the linear polarizer layer and the first retardation film layer The direction of the contact surface.

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

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

Since the polarizer provided in the embodiments of the present application can be applied to various structures, the position of the first groove on the polarizer can be determined according to the structure to which it is applied. For example, the polarizer may be used to attach on the display panel, and the orthographic projection of the first groove on the plane where the surface of the display panel is located does not overlap with the surface of the light-emitting area of the display panel. In this way, it is ensured that the light emitted from the light-emitting area can be processed by the polarizer, so as to be emitted in the form of circularly polarized light.

Optionally, the first retardation film layer has a second groove, 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 material of the first retardation film layer. Elastic Modulus. Because the first retardation film layer also has a second groove, and the elastic modulus of the second light-transmitting filling material filled in the second groove is smaller than that of the material of the first retardation film layer. Therefore, the average elastic modulus of the film layer where the first retardation film layer is located is reduced, thereby further reducing the probability of polarizer breakage.

Wherein, the second groove may also be a blind groove or a through groove. When the reference direction intersects with the contact direction, and the contact direction is the direction of the contact surface between the linear polarizer layer and the first retardation film layer, the second groove penetrates the first retardation film layer in the reference direction. In addition, the second groove in the first retardation film layer may also penetrate the first retardation film layer along the direction of the bending line. In this case, the elastic modulus of the first retardation film layer can be reduced to a greater extent, so that the polarizer receives less bending force when it is bent, and further reduces the probability of the polarizer breaking.

Further, the polarizer also includes: one or more second retardation film layers stacked in sequence on the side of the first retardation film layer away from the linear polarizer layer, and each second retardation film layer is on the side of the linear polarizer layer. The orthographic projection on the plane of the surface covers the surface of the linear polarizer layer. For example, the first retardation film layer may be a half wave plate, a second retardation film layer adjacent to the first retardation film layer may be a quarter wave plate, and the second retardation film layer may be Used to expand the viewing angle of the polarizer.

Wherein, some or all of the second retardation film layers in the one or more second retardation film layers have third grooves, the third grooves are filled with a third light-transmitting filling material, and the third light-transmitting filling material is The elastic modulus is smaller than the elastic modulus of the material of the second retardation film layer.

Similar to the effect of the first groove and the second groove above, because the second retardation film layer has a third groove, and the elastic modulus of the third light-transmitting filling material filled in the third groove is smaller than that of the third groove. The elastic modulus of the material of the two retardation film layers, therefore, reduces the average elastic modulus of the film layer where the second retardation film layer is located, and further reduces the probability of polarizer breakage.

In the embodiments of the present application, the materials of the linear polarizer layer, the first phase difference film layer and/or the second phase difference film layer can all be polymerizable liquid crystal materials, and the elastic modulus of the polymerizable liquid crystal material is in the range of 3 -10GPa. Illustratively, the elastic modulus of the polymerizable liquid crystal material is 3GPa, 5GPa, or 10GPa.

It should be noted that one or more of the first light-transmitting filling material, the second light-transmitting filling material, and the third light-transmitting filling material are light-transmitting adhesive materials. Wherein, the thickness of the light-transmitting adhesive material is equal to or greater than the depth of the groove it fills. When the thickness of the light-transmitting adhesive material is greater than the depth of the grooves it fills, the difference between the thickness of the light-transmitting adhesive material and the depths of the grooves it fills may be less than or equal to 5 μm. For example, the light-transmitting adhesive material is UV-curable optical adhesive or heat-curable optical adhesive, and the range of the elastic modulus of the light-transmitting adhesive material is 0.1-10 MPa. Since the elastic modulus of the light-transmitting adhesive material is generally smaller than the elastic modulus of the materials of the linear polarizer layer, the first retardation film layer and the second retardation film layer, the film layer where the linear polarizer layer is located is reduced. , The average elastic modulus of the film layer where the first retardation film layer is located and the film layer where the second retardation film layer is located, thereby reducing the bending of the linear polarizer, the first retardation film layer and the second retardation film layer. The bending force received reduces the probability of polarizer breakage.

In an implementation manner, the polarizer further includes: one or more second retardation film layers sequentially stacked on the side of the first retardation film layer away from the linear polarizer layer, one or more second retardation film layers A second retardation film layer adjacent to the first retardation film layer in the layers has a third groove, and among the plurality of second retardation film layers, the second retardation film layers arranged at intervals have third grooves, and each of the second retardation film layers has a third groove. A third groove is filled with a light-transmitting adhesive material.

For example, it is assumed that the number of the second phase difference modules is 2. Then 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 may be a through groove. Since the through grooves are arranged on the film layers arranged at intervals, when the transparent adhesive material is filled in the through grooves, the transparent adhesive material can be adjacent to the film layer where the through grooves are located and the film layer at the same time. The two film layers are bonded, therefore, the bonding effect can be ensured, and the bonding between the film layers is facilitated.

In the embodiment of the present application, when the cross-section of the light-emitting area 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. The display module includes: a display panel and the polarizer according to any one of the above-mentioned first aspect; The orthographic projection on the surface covers the light emitting area of the display panel.

For example, the orthographic projection of the polarizer on the plane where the surface of the display panel is located may coincide with the surface of the light emitting area of the display panel. For example, if the width of a single pixel in the light-emitting area in a certain direction is e, the width f of the functional area of the polarizer covering the pixel in this direction satisfies: f>e. The functional area of the polarizer refers to the overlapping linear polarizer, the first retardation film layer and the second retardation film layer of the orthographic projection of the film layer in the polarizer on the plane where the surface of the display panel is located.

Optionally, the display module further includes: a touch function film layer, and the touch function film layer is located between the polarizer and the display panel. In this case, the display module is a touch display module. For example, the touch function layer may include a TP conductive layer and an insulating layer. The TP conductive layer includes a plurality of laterally arranged touch driving lines Tx and a plurality of vertically arranged touch sensing lines Rx on the same layer. Wherein, in one case, the Tx is disconnected at the intersection with the Rx, and the disconnected Tx is connected by a conductive bridge (such as a metal bridge connection) located at the top of the Rx, and the conductive bridge and the Rx are arranged between There is an insulating layer.

Wherein, the touch function film layer may have a fourth groove, and the fourth groove may be a through groove or a blind groove. The fourth groove is filled with a fourth light-transmitting filling material, and the elastic modulus of the fourth light-transmitting filling material is smaller than the elastic modulus of the material of the touch functional film layer. For example, the fourth light-transmitting filling material may be a light-transmitting adhesive material.

When the fourth groove is a through groove, the touch function film layer can realize the bonding of the touch function module, the polarizer and the display panel through the light-transmitting adhesive material filled into the fourth groove. The optical adhesive layer is arranged between the module and the display panel, so that the touch function module can be attached to the display panel. It is also unnecessary to dispose an optical adhesive layer between the touch function module and the polarizer, so that the touch function module and the polarizer can be bonded together. Therefore, the thinning of the display module is achieved, and the probability of breakage of the display module during bending is reduced.

Further, the display module further includes: a light-shielding layer, 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 does not overlap with the surface of the light-emitting area of the display panel . For example, the light shielding layer may be a black photoresist layer. The light shielding layer can be used to absorb ambient light incident from outside the display module.

Further, the display module further includes: a flexible substrate, the flexible substrate is disposed on the side of the polarizer away from the display panel, and the flexible substrate is used to provide support for the film layer in the display module. And, the flexible substrate can also be used as a thin film encapsulation (TFE) or a transparent cover. Wherein, the thin film encapsulation layer is used to block water and oxygen for the display module.

Exemplarily, the linear polarizer layer, the first retardation mode layer and the second retardation mode layer in the polarizer are sequentially arranged along a direction close to the display panel. That is, the display module may include a linear polarizer layer, a first retardation mode layer, a second retardation mode layer, a light shielding layer, a touch function film layer and a display panel sequentially arranged on one side of the flexible substrate.

In an implementation manner, the display panel includes a first electrode layer and a second electrode layer, the first electrode layer and the second electrode layer are used to control the display panel to emit light; the second electrode layer is close to the polarizer relative to the first electrode layer, The second electrode layer includes 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 mesh pattern. The orthographic projection of the polarizer on the plane where the surface of the display panel is located covers the surface of the second electrode layer.

The second electrode layer is close to the polarizer relative to the first electrode layer. 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.

For example, the second electrode layer may be a translucent cathode layer. The display panel has a light-emitting area and a non-light-emitting area, and the non-light-emitting area includes an opening area (ie, a light-transmitting area) and a non-light-transmitting area. The second electrode layer has a mesh pattern, and the second electrode layer covers the light emitting area, that is, the mesh hole of the second electrode layer is the opening area of the display panel. Correspondingly, the polarizer also has a mesh pattern, and the groove of the polarizer is the opening area of the display panel.

In the embodiment of the present application, the above-mentioned display module having 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 area in the display module is usually a transparent area, therefore, the display module does not have a light-shielding layer.

Moreover, since the opening area of the display module is the area where the grooves are located, and the grooves are filled with transparent materials, the transparent materials may be fully transparent materials or semi-transparent materials. Therefore, the transmittance of the open area of the display device provided by the embodiments of the present application is relatively high (for example, the transmittance may be greater than 90%).

In a third aspect, a display device is provided, the display device comprising: a casing and any one of the display modules of the second aspect, the casing at least covering a non-display side of the display module.

The beneficial effects brought by the technical solution provided by this application include at least:

In the polarizer, display module and display device provided by the embodiments of the present application, some or all of the film layers in the linear polarizer layer, the first retardation film layer and the one or more second retardation film layers in the polarizer have concave The groove is filled with a light-transmitting filling material, and the elastic modulus of the light-transmitting 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 some or all of the linear polarizer layer, the first retardation film layer and the one or more second retardation film layers is reduced, thereby reducing the amount of the film layer when it is bent. The bending force received further reduces the probability of the polarizer breaking, and also reduces the breaking probability of the display module, and further reduces the breaking probability of the display device.

Description of drawings

Fig. 1 is the structural representation of a kind of traditional display module;

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

3 is a schematic structural diagram of a polarizer provided by an embodiment of the present application;

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

5 is a schematic structural diagram of another polarizer provided by an embodiment of the present application;

6 is a schematic diagram of a linear polarizer layer provided by an embodiment of the present application;

7 is a schematic diagram of another linear polarizer layer provided in an embodiment of the present application;

8 is a schematic structural diagram of a polarizer provided by an embodiment of the present application;

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

10 is a schematic structural diagram of another polarizer provided by an embodiment of the present application;

11 is a schematic structural diagram of still another polarizer provided by an embodiment of the present application;

12 is a flowchart of a method for manufacturing a polarizer provided by an embodiment of the present application;

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

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

15 is a schematic structural diagram after coating a light-transmitting adhesive material in the first concave of the linear polarizer layer provided in the embodiment of the present application;

16 is a schematic structural diagram after forming a first retardation film layer on one side of a linear polarizer layer provided by an embodiment of the present application;

17 is a schematic structural diagram of forming a second retardation film layer on the side of the first retardation film layer away from the transparent substrate provided by an embodiment of the present application;

18 is a schematic structural diagram after coating a light-transmitting adhesive material in the third groove of the second retardation film layer provided in an embodiment of the present application;

19 is a schematic structural diagram of a display module provided by an embodiment of the present application;

20 is a schematic diagram of the principle of anti-reflection characteristics of a display module provided by an embodiment of the present application;

21 is a partial structural schematic diagram of a display module provided by an embodiment of the present application;

22 is a flowchart of a method for manufacturing a display module provided by an embodiment of the present application;

23 is a schematic structural diagram of a touch function film layer formed on one side of the light-emitting side of the display panel according to an embodiment of the present application;

24 is a schematic diagram of a structure provided by an embodiment of the present application after forming a light shielding layer on the side of the touch functional film layer away from the display panel;

25 is a schematic structural diagram after coating a light-transmitting adhesive material on one side of a light-shielding layer provided by an embodiment of the present application;

FIG. 26 is a schematic diagram of a structure provided by an embodiment of the present application after a polarizer is formed on the side of the light shielding layer away from the display panel.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

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

For the convenience of readers' understanding, some theories involved in the embodiments of the present application will be described below:

The thickness of the display module is positively related to the bending force when it is bent.

其中，y为膜层表面到中性层之间的距离，该距离与膜层厚度正相关。该中性层指的是该膜层在弯折过程中，几乎不受弯折力的一个断层，该断层的应力几乎为零。ρ为弯折半径。根据该弯折应变的公式可知，当弯折半径ρ为定值时，距离y与弯折应变ε成正比，进而，膜层厚度与弯折应变ε正相关。且膜层的弯折应变ε越大，表示该膜层受到的弯折力(弯折力可以指的是拉伸力或者挤压力)越大。因此，膜层厚度与其所受的弯折力正相关，相应的，当膜层的厚度减少时，该膜层在弯折时所受的弯折力减小。Bending strain ε:

Among them, y is the distance from the surface of the film to the neutral layer, which is positively related to the thickness of the film. The neutral layer refers to a fault that is hardly subjected to bending force during the bending process of the film layer, and the stress of the fault is almost zero. ρ is the bending radius. According to the bending strain formula, when the bending radius ρ is a constant value, the distance y is proportional to the bending strain ε, and further, the film thickness is positively related to the bending strain ε. And the larger the bending strain ε of the film layer, the greater the bending force (bending force may refer to tensile force or extrusion force) on the film layer. Therefore, the thickness of the film layer is positively related to the bending force it is subjected to. Correspondingly, when the thickness of the film layer is reduced, the bending force that the film layer is subjected to during bending decreases.

σ为应力。根据上述弯折应变的公式和该弹性模量的公式可知，当弯折半径ρ和膜层表面到中性层之间的距离y(膜层厚度)为定值时，弯折应变ε为定值，此时，膜层的弹性模量E与应力σ正相关。当膜层的应力σ越大时，则表示该膜层受到的弯折力越大。因此，弹性模量E与其所受的弯折力正比，相应的，当膜层的弹性模量E降低时，该膜层在弯折时的所受弯折力减小。示例地，弹性模量可以为杨氏模量。Elastic modulus E:

σ is the stress. According to the above bending strain formula and the elastic modulus formula, when the bending radius ρ and the distance y (film thickness) between the surface of the film and the neutral layer are constant, the bending strain ε is constant value, at this time, the elastic modulus E of the film layer is positively related to the stress σ. When the stress σ of the film layer is greater, it means that the bending force of the film layer is greater. Therefore, the elastic modulus E is proportional to the bending force it is subjected to. Correspondingly, when the elastic modulus E of the film layer decreases, the bending force that the film layer is subjected to during bending decreases. Illustratively, the elastic modulus may be Young's modulus.

Please refer to FIG. 1 , which shows a schematic structural diagram of a conventional display module 01 . The traditional display module 01 includes: a display panel 011 , a touch screen 012 , a circular polarizer (abbreviated as polarizer) 013 and a transparent cover plate 014 , which are stacked in sequence, and each structure is bonded by an optical adhesive layer 015 . The touch panel (TP) 012 includes a touch electrode layer, and the circular polarizer 013 includes a triacetyl Cellulose (TAC) layer 0131, polyvinyl alcohol (polyvinyl alcohol) PVA) layer 0132, the first retardation mode layer 0133 and the second retardation film layer 0134, all the film layers (except between the TAC layer and the PVA layer) are bonded by the optical adhesive layer 015. Among them, 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 retardation mode layer 0133 may be a half-wave plate, and the second retardation film layer 0134 may be a quarter-wave plate.

The thickness of the display module is relatively thick due to the use of optical glue for bonding between each structure and between each film layer. For example, in the display module, the total thickness of the film layer between the side of the display panel close to the transparent cover plate and 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 related to the bending force when it is bent. Therefore, the display module is subject to a large bending force when it is bent and is prone to breakage.

Please refer to FIG. 2 , which shows a schematic structural diagram of another conventional display module 02 . The display module 02 includes: a display panel 021 , a touch screen 022 , a circular polarizer (abbreviated as polarizer) 023 and a transparent cover plate 024 , which are stacked in sequence. The circular polarizer 023 and the touch screen 022 are sequentially coated on the transparent cover plate 024 . And the circular polarizer 023 includes a linear polarizer layer 0231 and a retardation film layer (also known as an alignment film layer) 0232 sequentially coated on the transparent cover plate 024, and the linear polarizer layer 0231 and the retardation mode layer 0232 The materials are all coating-type liquid crystal materials.

However, due to the large elastic modulus (3-10 gigapascals (GPa)) of the coating type liquid crystal material, the elastic modulus of the display module is large, and the display module is prone to breakage during bending.

An embodiment of the present application provides a polarizer. Please refer to FIG. 3 , which shows a schematic structural diagram of a polarizer provided by an embodiment of the present application. The polarizer 11 includes: a linear polarizer layer 111 and a first retardation film layer 112 located on one side of the linear polarizer layer 111 .

The linear polarizer layer 111 has a first groove a1, the first groove a1 is filled with a first light-transmitting filling material, and the elastic modulus of the first light-transmitting filling material is smaller than the elastic modulus of the material of the linear polarizer layer 111 . For example, as shown in FIG. 3 , the first groove may be a through groove (ie, a through hole), or, as shown in FIG. 4 , the first groove a1 may also be a blind groove.

In addition, the orthographic projection of the first retardation film layer 112 on the plane where the surface of the linear polarizer layer 111 is located 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, the orthographic projection of the first retardation film layer 112 on the plane where the surface of the linear polarizer layer 111 is located may coincide with the surface of the linear polarizer layer 111 . The light irradiated to the polarizer can pass through the first retardation film layer 112 and the linear polarizer layer 111 in sequence to form circularly polarized light.

It should be noted that the first retardation film layer 112 may be a single film layer, or may be a composite film layer composed of multi-layer retardation sub-modes. The function of the first retardation film layer 112 is realized.

In the polarizer provided by the embodiments of the present application, since the linear polarizer layer in the polarizer has a first groove, the elastic modulus of the first light-transmitting filling material filled in the first groove is smaller than the elasticity of the material of the linear polarizer layer. Therefore, the average elastic modulus of the film layer where the linear polarizer layer is located is reduced, thereby reducing the bending force received by the polarizer during bending, and reducing the probability of the polarizer breaking.

Wherein, the first light-transmitting filling material may be a light-transmitting adhesive material. Since the elastic modulus of the light-transmitting adhesive material is usually smaller than the elastic modulus 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, thereby reducing the bending of the polarizer. The bending force received during folding reduces the probability of polarizer breakage. Further, in the case where the first light-transmitting filling material is a light-transmitting adhesive material, the linear polarizer layer 111 and the first retardation film layer can be formed by the light-transmitting adhesive material filled into the first groove a1. 112, so that there is no need to use an optical adhesive layer to bond the linear polarizer layer 111 and the first retardation film layer 112, thereby realizing the thinning of the polarizer.

Optionally, 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 intersect with the contact direction y, and the contact direction y is the direction in which the contact surface of the linear polarizer layer 111 and the first retardation film layer 112 is located. For example, the reference direction x may be perpendicular to the contact direction y. Similarly, when the first groove a1 is a blind groove, the horizontal extension direction of the first groove a1 may also cross the contact direction y.

Further, when the polarizer is a flexible polarizer, a bending line will be generated when the flexible polarizer is bent, and the first groove a1 on the linear polarizer layer 111 can penetrate the linear polarizer in a direction parallel to the bending line. Layer 111. In this way, since the groove can disperse the elastic modulus of the linear polarizer layer to a large extent, the average elastic modulus of the film where the linear polarizer layer is located is greatly reduced. During the bending force, the bending force it receives is smaller, which further reduces the probability of the polarizer breaking.

Since the polarizer provided in the embodiments of the present application can be applied to various structures, the position of the first groove on the polarizer can be determined according to the structure to which it is applied. For example, as shown in FIG. 5 , the polarizer 11 may be attached to the display panel 12 . At this time, the position of the first groove a1 on the linear polarizer layer 111 of the polarizer 11 can satisfy: the orthographic projection of the first groove a1 on the plane where the surface of the display panel 12 is located, and the light emitting area of the display panel 12 ( That is, the surfaces of the light-emitting pixel area) B do not overlap, so as to ensure that the light emitted by the light-emitting area B can be processed by the polarizer 11 to be emitted in the form of circularly polarized light.

Generally, when the cross section of the light emitting area B on the display panel 12 (the cross section is perpendicular to the thickness direction of the display panel 12 ) is a mesh pattern, correspondingly, as shown in FIG. 6 , the linear polarizer layer 111 may be Mesh graphics. Alternatively, when the cross-section of the light-emitting region B on the display panel 12 has an island-shaped distribution, as shown in FIG. 7 , the linear polarizer layer 111 may include a plurality of sub-polarizers, and the plurality of sub-polarizers are in the shape of an island. Island distribution.

Optionally, as shown in FIG. 8 , the first retardation film layer 112 may have a second groove a2, the second groove a2 is filled with a second light-transmitting filling material, and the elastic mold of the second light-transmitting filling material is The amount is smaller than the elastic modulus of the material of the first retardation film layer. Because the first retardation film layer also has a second groove, and the elastic modulus of the second light-transmitting filling material filled in the second groove is smaller than that of the material of the first retardation film layer. Therefore, the average elastic modulus of the film layer where the first retardation film layer is located is reduced, thereby further reducing the probability of polarizer breakage.

Moreover, the second groove a2 may also be a blind groove or a through groove. Among them, since the light needs to pass through the linear polarizer layer and the first retardation film layer at the same time 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 can be compared with the display panel. The surfaces of the light-emitting area (ie, the light-emitting pixel area) B of 12 do not overlap, so as to ensure that the light emitted by the light-emitting area B can be processed by the polarizer 11 and emitted in the form of circularly polarized light. For example, the projected position of the second groove a2 on the linear polarizer layer 111 may be consistent with the position of the first groove a1 on the linear polarizer layer 111 . When the second groove a2 in the first retardation film layer 112 is a through groove, the second groove a2 can penetrate the first retardation film layer 112 in the reference direction x, which intersects the contact direction y , the contact direction y is the direction y where the contact surface of the linear polarizer layer 111 and the first retardation film layer 112 is located.

In addition, the second groove a2 in the first retardation film layer 112 may also penetrate the first retardation film layer 112 along the direction of the bending line. In this case, the elastic modulus of the first retardation film layer can be reduced to a greater extent, so that the polarizer receives less bending force when it is bent, and further reduces the probability of the polarizer breaking.

It should be noted that when the second groove a2 in the first retardation film layer 112 is a blind groove, the orthographic projection of the first retardation film layer 112 on the plane where the surface of the linear polarizer layer 111 is located can cover the linearly polarized light The surface of the sheet layer 111 . Therefore, under the condition that the light passing through the first retardation film layer 112 and exiting from the linear polarizer layer 111 is all circularly polarized light, the projected position of the second groove a2 on the linear polarizer layer 111 is the same as that of the first groove a2. The positions of the grooves a1 on the linear polarizer layer 111 may not be uniform.

Further, as shown in FIG. 9 , the polarizer 11 may further include: one or more second retardation film layers 113 sequentially stacked on the side of the first retardation film layer 112 away from the linear polarizer layer 111 . The orthographic projection of each second retardation film layer 113 on the 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 retardation film layer 112 may be a half wave plate, a second retardation film layer 113 adjacent to the first retardation film layer 112 may be a quarter wave plate, and the second retardation film layer 113 may be a quarter wave plate. The film layer 113 can be used to expand the viewing angle of the polarizer. For example, when the number of the second retardation film layer 113 is 1, the second retardation film layer 113 is disposed on the side of the first retardation film layer 112 away from the linear polarizer layer 111 . When the number of the second retardation film layers 113 is 3, the three second retardation film layers 113 are stacked in sequence on the side of the first retardation film layer 112 away from the linear polarizer layer 111 . The orthographic projection of each second retardation 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 . It should be noted that FIG. 9 only shows that the polarizer 11 includes a second retardation film layer 113 , and the orthographic projection and linear polarization of the second retardation film layer 113 on the plane where the surface of the linear polarizer layer 111 is located The case where the surfaces of the sheet layers 111 overlap.

Wherein, some or all of the second retardation film layers 113 in the one or more second retardation film layers 113 have a third groove a3, and the third groove a3 is filled with a third light-transmitting filling material, and the third groove a3 is filled with a third light-transmitting filling material. The elastic modulus of the triple light-transmitting filling material is smaller than the elastic modulus of the material of the second retardation film layer. For example, it is assumed that the polarizer 11 includes four second retardation film layers 113 . Wherein, each of the four second retardation film layers 113 may have a third groove a3. Alternatively, among the four second retardation film layers 113 , two second retardation film layers 113 have the third groove a3 , and the other two second retardation film layers 113 do not have the third groove a3 .

Similar to the effect of the first groove a1 and the second groove a2 above, because the second retardation film layer has a third groove, and the elastic modulus of the third light-transmitting filling material filled in the third groove is The elastic modulus of the material of the second retardation film layer is smaller than that of the second retardation film layer, therefore, the average elastic modulus of the film layer where the second retardation film layer is located is reduced, and the probability of polarizer breakage is further reduced.

In the embodiments 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 all be polymerizable liquid crystal materials, and the elastic modulus of the polymerizable liquid crystal material is The range is 3-10GPa. Illustratively, the elastic modulus of the polymerizable liquid crystal material is 3GPa, 5GPa, or 10GPa.

Optionally, one or more of the above-mentioned first light-transmitting filling material, second light-transmitting filling material and third light-transmitting filling material may be a light-transmitting adhesive material. Wherein, the thickness of the light-transmitting adhesive material is equal to or greater than the depth of the groove it fills. When the thickness of the light-transmitting adhesive material is greater than the depth of the grooves it fills, the difference between the thickness of the light-transmitting adhesive material and the depths of the grooves it fills may be less than or equal to 5 μm. For example, the light-transmitting adhesive material is UV-curable optical adhesive or heat-curable optical adhesive, and the range of the elastic modulus of the light-transmitting adhesive material is 0.1-10 MPa. Since the elastic modulus of the light-transmitting adhesive material is generally smaller than the elastic modulus of the materials of the linear polarizer layer, the first retardation film layer and the second retardation film layer, the film layer where the linear polarizer layer is located is reduced. , the average elastic modulus of the film layer where the first retardation film layer is located and the film layer where the second retardation film layer is located, thereby reducing the polarizer, the first retardation film layer and the second retardation film layer. The bending force reduces the probability of polarizer breakage.

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

That is, in the stacked linear polarizer layer 111 , the first retardation film layer 112 and the one or more second retardation film layers 113 , grooves may be provided on the film layers arranged at intervals. For example, referring to FIG. 9 , it is assumed that the number of the second phase difference modules 113 is one. Then, the linear polarizer 111 has a first groove a1, and a second retardation film layer 113 adjacent to the first retardation film layer 112 has a third groove a3. Wherein, the groove may be a through groove. Since the through grooves are arranged on the film layers arranged at intervals, when the transparent adhesive material is filled in the through grooves, the transparent adhesive material can be adjacent to the film layer where the through grooves are located and the film layer at the same time. The two film layers are bonded, therefore, the bonding effect can be ensured, and the bonding between the film layers is facilitated.

For example, 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 and arranged. The linear polarizer layer 111 and the second retardation film layer 113 have through grooves, and the through grooves are filled with a light-transmitting adhesive material. The light-transmitting adhesive material filled in the through grooves of the linear polarizer layer 111 can realize the bonding of the linear polarizer layer 111 and the first retardation film layer 112 . The light-transmitting adhesive material filled in the through groove of the second retardation film layer 113 can realize the bonding of the first retardation film layer 112 and the second retardation film layer 113 .

It should be noted that, one or more of the above-mentioned first groove, second groove and third groove may be blind grooves or through grooves. Wherein, when one or more of the first groove, the second groove and/or the third groove are all blind grooves, the first groove, the second groove and/or the third groove are filled with In the case of a light-transmitting adhesive material, the openings of the first groove, the second groove and/or the third groove may be oriented in the same direction. For example, as shown in FIG. 10 , when the first groove, the second groove and the third groove are all blind grooves, the openings of the first groove, the second groove and the third groove may all face the same In this case, the linear polarizer layer 111 can be attached to the first retardation film layer 111 through a light-transmitting adhesive material filled in the second groove a2 of the first retardation film layer 112 . The first retardation film layer 112 can be attached to the second retardation film layer 111 through a light-transmitting adhesive material filled in the third groove a3 of the second retardation film layer 113 . The openings of the first groove, the second groove and/or the third groove may also face in different directions. As shown in Fig. 11, Fig. 11 shows 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 a first groove a1. When the first groove a1 is a blind groove, in the first groove a1 of the linear polarizer layer 111, a part of the opening of the first groove a1 faces the direction of the first retardation film 112; another part of the first groove The opening of a1 faces the direction away from the first retardation film 112 . In this way, the linear polarizer layer 111 and the first retardation film layer 112 can be bonded together without using optical glue, which is beneficial to the thinning of the polarizer.

Since the above-mentioned first groove, second groove and/or third groove can be filled with light-transmitting adhesive material, this can not only reduce the average elastic modulus of the film layer where the groove is located, but also can be filled to The light-transmitting adhesive material of the groove enables the film layer where the groove is located to be bonded to other film layers, so that the polarizer in the embodiment of the present application reduces the optical The adhesive layer is formed, thereby reducing the overall thickness of the polarizer and realizing the thinning of the polarizer. And because the thickness of the polarizer is reduced, the bending force that the polarizer is subjected to during bending is reduced, and the probability of the polarizer breaking is further reduced.

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

It is worth noting that, in the polarizer provided by the embodiment of the present application, when 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 can be If it is reduced by 50%, then, under the same bending radius, the stress and bending strain of the linear polarizer layer can be reduced by 50%. Wherein, the cross-section of the first groove and the cross-sectional area of the linear polarizer layer are both parallel to the above-mentioned contact direction. Similarly, when the area of the cross section of the third groove also accounts for 50% of the area of the cross section of the second retardation film, under the same bending radius, the average elasticity of the second retardation film The modulus can be reduced by 50%, then, under the same bending radius, the stress and bending strain of the second retardation film layer can be reduced by 50%.

To sum up, in the polarizer provided in the embodiments of the present application, some or all of the linear polarizer layer, the first retardation film layer and the one or more second retardation film layers have grooves, and the The groove is filled with a transparent filling material, and 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 some or all of the linear polarizer layer, the first retardation film layer and the one or more second retardation film layers is reduced, thereby reducing the amount of the film layer when it is bent. The bending force received, thereby reducing the probability of polarizer breakage.

Please refer to FIG. 12 , which shows a flowchart of a method for manufacturing a polarizer provided in an embodiment of the present application, and the method can be used to manufacture the polarizer as shown in any one of FIGS. 3 to 11 . In the following, the grooves of the polarizer are filled with light-transmitting adhesive materials as an example for description. As shown in Figure 12, the method includes:

Step 101, providing a transparent substrate.

Exemplarily, the transparent substrate may be a substrate made of polyethylene terephthalate (PET), or a substrate made of triacetyl cellulose (TAC), or the transparent substrate may be a COP ( Cyclic olefin polymer (COP), transparent polyimide (Color-less polyimide, CPI) substrate with hard coating (hard coating, HC) on the surface, ultra-thin tempered glass or composite polymer film, etc.

Step 102 , forming a linear polarizer layer on the transparent substrate, the linear polarizer layer having a first groove.

Wherein, 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 the elastic modulus of the material of the linear polarizer layer. The first groove may penetrate the linear polarizer layer in a reference direction, the reference direction intersecting with the contact direction, and the contact direction is the direction where the 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 the linear polarizer layer in a direction parallel to the bending line.

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

Step (1), depositing a layer of linearly polarizing material on the transparent substrate by a coating process to form a linearly polarizing material layer, and using an alignment process to align the linearly polarizing material layer to form a linearly polarizing material layer.

As shown in FIG. 13 , it shows a schematic structural diagram of a linear polarizer material layer 1111 formed on the transparent substrate 00 provided in an embodiment of the present application. Wherein, the coating process may include drop coating, blade coating or printing and the like. The linear polarizing material can be a liquid crystal solution doped with dichroic dye molecules, or PVA doped with dichroic dye molecules. Illustratively, dichroic dye molecules include iodine and dichroic dyes. The dichroic dyes may include red BR, red LR, red R, pink LB, magenta BL, burgundy 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, Crimson GL, Crimson KGL, Congo Red, Brilliant Violet BK, Supra Blue G, Supra Blue GL, Direct Sky Blue, Direct Lightfast Orange S ( Direct Fast Orange S) and Fast Black.

The alignment process (also called alignment method) can make a certain type of material molecules align in a certain direction to form a film. Among them, the material molecules have a polarization effect, and the polarization effect is also called double absorption effect or dichroism effect. Double absorption or dichroism refers to optical anisotropy in which light absorption is different in two directions of the optical axis direction and the direction perpendicular thereto. When the molecules of the material are arranged more neatly in a certain direction, it means that the double absorption ratio of the material is greater.

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: irradiating the liquid crystal doped with dichroic dye molecules with specific light, so that the liquid crystal molecules and the dichroic dye molecules are arranged in a certain direction, and the liquid crystal molecules and the dichroic dye molecules are arranged neatly. The dye molecules are cross-linked and cured to obtain a linear polarizer material layer. Among them, the cross-linking curing refers to that the branches of the polymer compound are connected together by chemical reaction.

The process of the rubbing alignment process may include: rubbing the surface of the linearly polarized material layer with a rubbing cloth to form grooves on the surface of the linearly polarized material layer, the linearly polarized material molecules are arranged along the grooves, and the neatly arranged linearly polarized material molecules are realized. After cross-linking and curing, a linear polarizer material layer is obtained.

PMR is suitable for a film layer made of a linearly polarized material composed of a photo-alignment material doped with dichroic dye molecules (generally, molecules with liquid crystal properties and rotatable when polarized light is irradiated). At this time, the process of PMR may include: using a polarized light ray polarizing material layer with a certain vibration direction, and after the polarized light is absorbed by the photo-alignment molecules in the linearly polarizing material, the photo-alignment molecules and the dichroic dye molecules are caused to rotate at the same time. , until the alignment direction of the photoalignment 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 that are aligned in a certain direction. The aligned molecules are cross-linked and cured to obtain a material layer for forming a linear polarizer.

In step (2), the linear polarizer material layer is processed through a patterning process to obtain a linear polarizer layer, and the linear polarizer layer has a first groove.

As shown in FIG. 14 , it shows a schematic structural diagram after forming a linear polarizer layer 111 on a transparent substrate 00 provided by an embodiment of the present application. The patterning process may be implemented in various manners, and the embodiments of the present application are described by taking the following two as examples.

The first implementation method: first coat the photoresist on the cross-linked and cured linear polarizer material layer to form a photoresist layer, and then use the yellow light process to pattern the photoresist layer. The photoresist layer has a hollow area, and then an etching process (eg, laser etching or solvent cleaning) is used to etch the linear polarizer material layer not covered by the photoresist layer to form a first groove, and then lift off The process peels off the photoresist layer to obtain a linear polarizer layer with a first groove.

Wherein, the realization process of the yellow light process may include: exposing the photoresist layer with a mask, so that the photoresist layer forms a fully exposed area and a non-exposed area, and then using a development process to make the photoresist layer of the fully exposed area The photoresist is completely removed, and all the photoresist in the non-exposed area remains, and the area where the photoresist is completely removed is the hollow area.

The second implementation method: place the mask on one side of the linear polarizer material layer (that is, the linear polarizer material liquid film), and then use a specific light source (light source with the ability to induce alignment molecules to polymerize) to illuminate the linear polarizer material layer. The side where the photomask is placed in the middle, so that the part not blocked by the photomask undergoes a polymerization reaction under the illumination of the light source, and the linear polarizer material layer shielded by the photomask does not undergo a polymerization reaction. Afterwards, the part of the linear polarizer material layer that has not undergone the polymerization reaction is cleaned with a solvent to remove the part of the linear polarizer material layer, so as to form grooves on the linear polarizer material layer to obtain a patterned linear polarizer layer, and then remove the mask . Among them, the photomask is also called a photomask and a mask.

Step 103 , coating a light-transmitting adhesive material in the first groove of the linear polarizer layer.

As shown in FIG. 15 , it shows a schematic structural diagram after coating a light-transmitting adhesive material in the first groove a1 of the linear polarizer layer 111 provided in an embodiment of the present application. Wherein, a coating process can be used to coat a light-transmitting adhesive material on one side of the in-line polarizer layer 111 , and then fill the light-transmitting adhesive material into the first groove a1 through a leveling and low-pressure defoaming process. For example, the light-transmitting adhesive material may be UV-curable optical adhesive or thermal-curable optical adhesive, and the difference between the thickness of the light-transmitting adhesive material and the depth of the filled first groove a1 is less than or equal to 5 μm.

Step 104 , forming a first retardation film layer on one side of the linear polarizer layer.

The orthographic projection of the first retardation 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 retardation film layer is used to cooperate with the linear polarizer layer, so that the layer and the light emitted from the linear polarizer layer is circularly polarized light. Wherein, the first phase difference mode layer may 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 formed on one side of the linear polarizer layer 111 provided in the embodiment of the present application, the first retardation film layer 112 does not have second groove.

The first retardation film layer 112 can be a finished retardation film layer (ie, a pre-prepared retardation film layer), and the manufactured first retardation film layer 112 can be directly transferred to a layer coated with a transparent bonding material one side of the linear polarizer layer 111. Wherein, when the finished phase difference film layer is used to form an ultra-thin polarizer, the finished phase difference film layer can be a phase difference mode made of liquid crystal (that is, the finished phase difference film layer is a liquid crystal type phase difference film layer) film layer), the thickness of the liquid crystal retardation film layer may be 500 nm (nanometer) to 5 μm. When the finished retardation film layer is used to form a common polarizer, the finished retardation film layer can be a retardation mode made of polymer (that is, the finished retardation film is a polymer retardation film) . For example, the manufacturing material of the polymer retardation film may be PMMA, polystyrene (PS), polycarbonate (polycarbonate, PC) and/or cycloolefin resin, etc. The thickness of the polymer retardation film Usually larger 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 in-line polarizer layer 111 may include: adopting a coating process for a layer of the in-line polarizer layer 111 A layer of first retardation material is deposited on the side 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 a film layer without the second groove as an example for description. When the first retardation film layer is a film layer with a second groove, the second groove can be filled with a light-transmitting adhesive material. Wherein, the second groove may penetrate the first retardation film layer in the reference direction, and the direction in which the contact surface of the linear polarizer layer and the first retardation film layer is located intersects with the reference direction.

Moreover, 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 linear polarizer layer 111 may include: A layer of a first phase difference material is deposited on one side to form a first phase difference material layer. Then, the first retardation material layer is processed through a patterning process to obtain the first retardation film layer 112 having the second groove.

Step 105 , forming a second retardation film layer on the side of the first retardation film layer away from the transparent substrate, and the second retardation film layer has a third groove.

Wherein, the orthographic projection of the one second retardation film layer on the plane where the surface of the linear polarizer layer is located can cover the surface of the linear polarizer layer. The third groove of the second retardation film layer 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 retardation film layer. The present application describes the manufacturing process of the second retardation film layer by taking the example of forming a second retardation film layer on the side of the first retardation film layer away from the transparent substrate. As shown in FIG. 17 , which shows a schematic structural diagram of a second retardation film layer 113 formed on the side of the first retardation film layer 112 away from the transparent substrate 00 provided by an embodiment of the present application, the first retardation film layer 113 is The two retardation film layers have third grooves. Wherein, the thickness of the one second retardation film layer may be 500 nm-5 μm.

The process of forming a second retardation film layer 113 on the side of the first retardation film layer 112 away from the transparent substrate 00 may include: first, using a coating process on a side of the first retardation film layer 112 away from the transparent substrate 00 A second phase difference material is deposited on the side to form a second phase difference material layer. Then, the second retardation material layer is processed through a patterning process to obtain the second retardation film layer 113 .

It should be noted that, similar to the first retardation film layer 112 described above, the second retardation film layer may or may not have a third groove. When the second retardation film layer does not have the third groove, the process of forming a second retardation film layer 113 on the side of the first retardation film layer 112 away from the transparent substrate 00 may include: using a coating process A second retardation material is deposited on the side of the first retardation film layer 112 away from the transparent substrate 00 to form a second retardation film layer 113 .

Step 106 , coating a light-transmitting adhesive material in the third groove of the second retardation film layer.

As shown in FIG. 18 , it shows a schematic structural diagram after coating a light-transmitting adhesive material in the third groove a3 of the second retardation film layer 113 according to an embodiment of the present application. The process of coating the light-transmitting adhesive material in the third groove a3 of the second retardation film layer 113 may include: using a coating process to coat the light-transmitting adhesive material on one side of the second retardation film layer 113 material, and then the light-transmitting adhesive material is filled into the third groove a3 through a 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 being exposed, a light-transmitting adhesive A protective film is attached to one side of the second retardation film layer of the composite material, and the protective film is a releasable protective film, and the releasable protective film can be removed when the polarizer needs to be used.

Step 107, peel off the transparent substrate.

At this time, the production of the polarizer is completed, and the transparent substrate is peeled off.

It is worth noting that, in the above-mentioned manufacturing method embodiments, only the manufacturing method of the polarizer when the polarizer includes a second retardation film layer is shown. When the polarizer includes a plurality of second retardation film layers. After the above 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 sequence. Exemplarily, the polarizer includes two second retardation film layers, and the second retardation film layer close to the first retardation film layer has a third groove, and the second retardation film layer far from the first retardation film layer has a third groove There is no third groove. Then, after the above step 104 is performed, the above step 105 and step 106 may continue to be performed. After that, on the side of the second retardation film layer with the third groove that is far away from the transparent substrate 00, the second retardation film layer without the third groove is continued to be formed. And the process of forming the second retardation film layer without the third groove on the side of the second retardation film layer with the third groove away from the transparent substrate 00 may include: adopting a coating process on the second retardation film layer with the third groove. A second retardation material is deposited on the side of the second retardation film layer of the groove away from the transparent substrate 00 to form a second retardation film layer 113 without the third groove.

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

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

To sum up, the manufacturing method of the polarizer provided by the embodiments of the present application is due to one of the linear polarizer layer, the first retardation film layer and the one or more second retardation film layers in the polarizer formed. One or more film layers have grooves, and the grooves are filled with a light-transmitting filling material, and the elastic modulus of the light-transmitting filling material is smaller than that of the material of the film layer where the grooves are located. Therefore, the average elastic modulus of one or more of the linear polarizer layer, the first retardation film layer, and the one or more second retardation film layers is reduced, thereby reducing the bending of the film. The bending force it is subjected to, thereby reducing the probability of polarizer breakage.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the structure of the polarizer manufactured by the above-described manufacturing method of the polarizer may refer to the specific structure of the polarizer in the foregoing embodiments. It is not repeated here.

Please refer to FIG. 19 , which shows a schematic structural diagram of a display module provided by an embodiment of the present application. The display module includes: a display panel 12 and any polarizer 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 where the surface of the display panel 12 is located 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 where the surface of the display panel 12 is located may coincide with the surface of the light emitting area B of the display panel 12 . For example, if the width of a single pixel in the light-emitting area in a certain direction is e, the width f of the functional area of the polarizer covering the pixel in this direction satisfies: f>e. Among them, the functional area of the polarizer 11 refers to the overlapping linear polarizer, the first retardation film layer and the second retardation film layer of the orthographic projection of the film layer in the polarizer on the plane where the surface of the display panel 12 is located .

Optionally, the display module may further include: a touch functional film layer 13 , the touch functional film layer 13 is located between the polarizer 11 and the display panel 12 . In this case, the display module is a touch display module. For example, the touch function layer 13 may include a TP conductive layer and an insulating layer. The TP conductive layer includes a plurality of laterally arranged touch driving lines Tx and a plurality of vertically arranged touch sensing lines Rx on the same layer. Wherein, in one case, the Tx is disconnected at the intersection with the Rx, and the disconnected Tx is connected by a conductive bridge (such as a metal bridge connection) located at the top of the Rx, and the conductive bridge and the Rx are arranged between There is an insulating layer.

Further, the touch functional layer 13 may further include: an organic protective film, the organic protective film is disposed on the side of the TP conductive layer away from the display panel 12 , and the organic protective film is used to protect the TP conductive layer from being adjacent to the TP conductive layer. The film is damaged due to collision. For example, the organic protective film may be a polymethylmethacrylate (poly methylmethacrylate, PMMA) material layer with a thickness of 1 μm, and PMMA is also called acrylic and acrylic.

Further, the touch function film layer 13 may have a fourth groove. The orthographic projection of the fourth groove on the plane where the surface of the TP conductive layer is located may not coincide with Tx, Rx and the conductive bridge. The fourth groove may be filled with a fourth light-transmitting filling material, and the elastic modulus of the fourth light-transmitting filling material is smaller than the elastic modulus of the material of the touch functional film layer. For example, the fourth light-transmitting filling material may be a light-transmitting adhesive material.

Optionally, the fourth groove may be a through groove or a blind groove. And, since the fourth groove can be filled with 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 light-transmitting adhesive material filled into the fourth groove. An optical adhesive layer is provided between the touch function module 13 and the display panel 12 , so that the touch function module 13 and the display panel 12 can be bonded together. It is also unnecessary to provide an optical adhesive layer between the touch function module 13 and the polarizer 11 , so that the touch function module 13 and the polarizer 11 can be bonded together. Therefore, the thinning of the display module is achieved, and the probability of breakage of the display module during bending is reduced.

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

In the related art, in the case where the touch function layer 13 is integrated, in order to realize the two-sided bonding of the touch function layer 13, it is also necessary to use optical glue. In the embodiment of the present application, the touch function layer 13 is integrated on the polarizer 11. In this case, since the bonding of the touch functional layer 13 and the display panel 12 can be realized by the light-transmitting adhesive material filled into the fourth groove; The touch function layer 13 and the polarizer 11 are adhered to each other by the light-transmitting adhesive material filled into the fourth groove. Therefore, the display module can be thinned and the probability of breakage when the display module is bent is reduced. .

Optionally, please continue to refer to FIG. 19 , the display module may further include: a light shielding layer 14 , which is also called a black matrix (BM). The light shielding layer 14 is located between the touch functional film layer 13 and the polarizer 11 , and the orthographic projection of the light shielding layer 14 on the plane where the surface of the display panel 12 is located does not overlap with the surface of the 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 also be understood that 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 covers the first groove in the linear polarizer layer. For example, the orthographic projection of the light shielding layer 14 on the plane where the surface of the display panel 12 is located coincides with the surface of the non-light-emitting area (ie, the area other than the light-emitting area B) of the display panel 12 . The light shielding layer 14 can be a black photoresist layer. The light shielding layer 14 can be used to absorb ambient light incident from outside the display module.

Optionally, please continue to refer to FIG. 19, the display module further includes: a flexible substrate 15, the flexible substrate 15 is disposed on the side of the polarizer 11 away from the display panel 12, the flexible substrate 15 is used for the film in the display module Layers provide support. Also, the flexible substrate 15 can also be used as a thin film encapsulation (TFE) or a transparent cover. Wherein, the thin film encapsulation layer is used to block water and oxygen for the display module.

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

In order to prevent ambient light (that is, natural light) from irradiating the film layer (for example, the thin film transistor film layer) in the display panel to cause reflection, therefore, it is usually necessary to provide an anti-reflection layer on the side of the display panel close to the polarizer, so that the display mode The group has an anti-reflection function to avoid reflection caused by ambient light irradiating on the surface of a film layer (such as a thin film transistor film layer) with a high reflectivity in the display panel. In the embodiment of the present application, the arrangement of the polarizer 11 and the light shielding layer 14 can make the display module have anti-reflection properties.

As shown in FIG. 20 , when the ambient light O is incident from one side of the flexible substrate 15 , a part of the ambient light O ₁ is irradiated on the polarizer 11 , and the ambient light irradiated on the polarizer 11 passes through the polarizer 11 to form Circularly polarized light, the circularly polarized light is irradiated to the reflective layer of the display panel 12, the reflective layer reflects the circularly polarized light, and the reflected circularly polarized light passes through the second phase difference mode layer 113 in the polarizer 11 and After the first retardation mode layer 112, polarized light perpendicular to the vibration direction of the original polarized light is formed, 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 , the polarizer 11 achieves the anti-reflection effect, so that the display module has anti-reflection properties.

Please continue to refer to FIG. 20 , after incident from one side of the flexible substrate 15, another part of the ambient light O ₂ is irradiated on the light shielding layer 14, and the ambient light irradiated on the light shielding layer 14 will be absorbed by the light shielding layer 14, so that the ambient light O 2 will be absorbed by the light shielding layer 14. 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 anti-reflection properties.

Optionally, the display panel may include: a first electrode layer, a second electrode layer, and a light-emitting layer located between the first electrode layer and the second electrode layer. The first electrode layer and the second electrode layer are used to control the light-emitting layer to emit light. Wherein, the second electrode layer is close to the polarizer relative to the first electrode layer. Wherein, the second electrode layer is close to the polarizer relative to the first electrode layer, 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 improve 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, and the plurality of second electrodes are distributed in an island shape, or the second electrode layer is a mesh pattern (that is, the second electrode layer is a patterned film layer) . Since the second electrode layer is located in the light-emitting area of the display panel, the orthographic projection of the polarizer on the plane where the surface of the display panel is located covers the surface of the second electrode layer.

For example, as shown in FIG. 21 , the second electrode layer may be a translucent cathode layer. The display panel 12 has a light-emitting area B and a non-light-emitting area C, and the non-light-emitting area C includes an opening area (ie, a light-transmitting area) C1 and a non-light-emitting area C2. The second electrode layer has a mesh pattern, and the second electrode layer covers the light emitting area B, that is, the mesh hole of the second electrode layer is the opening area C1 of the display panel.

Moreover, since the polarizer 11 also covers the light emitting area B of the display panel 12, the orthographic projection of the polarizer 11 on the plane where the surface of the display panel 12 is located covers the second electrode layer. When the second electrode layer has a mesh pattern, correspondingly, the polarizer also has 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 above-mentioned display module having 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 higher transmittance of the transparent display device, the non-light-emitting area C in the display module is usually a transparent area. Therefore, the display module does not have a light-shielding layer .

In the transparent display device of the related art, since the transparent display device is provided with a traditional polarizer, and the orthographic projection of the conventional polarizer on the plane where the surface of the display panel is located is usually coincident with the surface of the display panel, the polarizer The transmittance of the transparent display device is usually low. For example, when the traditional polarizer projects and transmits light in the wavelength range of 400-800 nanometers, its transmittance is only about 45%. Therefore, the open area of the transparent display device ( That is, the transmittance of the open area of the display panel) is usually low. The transmittance refers to the ratio of the radiant energy transmitted through the transparent display device to the total radiant energy projected onto the transparent display device. The transmittance T of the transparent display device satisfies: T=S _C ×TC , where _{S C is} the ratio of the area of the opening area to the total cross-sectional area of the transparent display device, and T _C is the transmittance of the opening area.

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

In the embodiment of the present application, since the opening area of the display module is the area where the grooves are located, and the grooves are filled with transparent materials, the transparent materials may be fully transparent materials or translucent materials. Therefore, the transmittance of the open area of the display device provided by the embodiments of the present application is relatively 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 region is 90%, the transmittance of the display device provided by the embodiment of the present application is T=90%×50%=45%. The transmittance is double that of the conventional transparent display device. Therefore, the display module provided by the embodiment of the present application has a high transmittance.

To sum up, in the display module provided by 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 film layers in the polarizer of the display module The plurality of film layers have grooves, and the grooves are filled with light-transmitting filling material, and the elastic modulus of the light-transmitting filling material is smaller than that of the material of the film layer where the grooves are located. Therefore, the average elastic modulus of one or more film layers in the linear polarizer layer, the first retardation film layer and the one or more second retardation film layers in the polarizer is reduced, thereby reducing the bending of the film layer. The bending force it is subjected to at the time, thereby reducing the probability of the polarizer breaking, and also reducing the probability of the display module breaking.

Further, in the polarizer of the display module, the linear polarizer layer may have a first groove, and/or the first retardation film layer may have a second groove, and/or, the second retardation film layer It can have three grooves, and the grooves are filled with light-transmitting adhesive material, so that the linear polarizer layer can be attached to the first retardation film layer through the adhesive material, and the first retardation film layer can be bonded to the first retardation film layer through the adhesive material. The second retardation film layer is attached. Therefore, there is no need to use an optical adhesive layer to bond the linear polarizer layer, the third retardation film layer and the second retardation film layer, thereby realizing the thinning of the display module and reducing the probability of breakage of the display module.

Please refer to FIG. 22 , which shows a flowchart of a method for manufacturing a display module provided by an embodiment of the present application, and the method can be used to manufacture a display module as shown in any one of FIGS. 19 to 21 . The embodiments of the present application are described by taking the integration of the touch function film layer on the display panel as an example. As shown in Figure 22, the method includes:

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

As shown in FIG. 23 , it shows a schematic structural diagram of a touch function film layer 13 formed on one side of the light-emitting side of the display panel 12 provided by an embodiment of the present application. Wherein, the thickness of the touch function layer 13 may be 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 arranged touch driving lines Tx and a plurality of vertically arranged touch sensing lines Rx on the same layer. Wherein, in one case, the Tx is disconnected at the intersection with the Rx, and the disconnected Tx is connected by a conductive bridge (such as a metal bridge connection) located at the top of the Rx, and the conductive bridge and the Rx are arranged between There is an insulating layer.

Further, the touch functional layer 13 may further include: an organic protective film, the organic protective film is disposed on the side of the TP conductive layer away from the display panel 12 , and the organic protective film is used to protect the TP conductive layer from being adjacent to the TP conductive layer. The film is damaged due to collision. For example, the organic protective film can be a layer of PMMA material with a thickness of 1 μm, and PMMA is also called acrylic and acrylic.

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

In step (1), a layer of conductive material is deposited on the light-emitting side of the display panel by a process such as magnetron sputtering or thermal evaporation to obtain a conductive material layer, and the conductive material layer is processed through a patterning process to obtain a TP conductive layer.

In step (2), a coating process is used to deposit an insulating material on the side where the TP conductive layer is formed to obtain an insulating material layer, and a patterning process is used to process the insulating material layer to obtain an insulating layer.

In step (3), a layer of conductive material is deposited on the side of the insulating layer away from the TP conductive layer by processes such as magnetron sputtering or thermal evaporation to obtain a conductive material layer, and the conductive material layer is processed by a patterning process to obtain a conductive material layer. bridge.

Step (4), using a coating process to form an organic protective film on the side of the insulating layer away from the TP conductive layer.

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 the elastic modulus of the fourth light-transmitting filling material is smaller than that of the material of the touch function film layer. Elastic Modulus. The fourth light-transmitting filling material is a light-transmitting adhesive material. When the touch function film layer has a fourth groove, the process of forming the touch function film layer on the light-emitting side of the display panel may further include:

In step (5), the organic protective film is processed through a patterning process to obtain an organic protective film having a fourth groove, and the fourth groove is filled with a light-transmitting adhesive material.

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

As shown in FIG. 24 , it shows a schematic structural diagram after forming the light shielding layer 14 on the side of the touch functional film layer 13 away from the display panel 12 provided by an embodiment of the present application. The thickness of the light shielding layer 14 may be less than 1 μm, and the orthographic projection of the light shielding layer 14 on the plane where the surface of the display panel 12 is located may not overlap with the surface of the light emitting area B of the display panel 12 .

The process of forming the light-shielding layer on the side of the touch-functional film layer away from the display panel may include: first, depositing a light-shielding material on the side of the touch-functional film layer away from the display panel by a coating process to obtain a light-shielding material layer, and applying a patterning process to the light-shielding material layer. The light-shielding material layer is processed to obtain a light-shielding layer.

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

As shown in FIG. 25 , it shows a schematic structural diagram of a light-transmitting adhesive material coated on one side of the light-shielding layer 14 provided in an embodiment of the present application. Because the orthographic projection of the light shielding layer 14 on the plane where the surface of the display panel 12 is located does not overlap with the surface of the light emitting area of the display panel 12 . Therefore, it can be considered that the light shielding layer 14 has a groove, and the orthographic projection of the groove on the plane where the surface of the display panel 12 is located coincides with the surface of the light emitting area B of the display panel 12 . Then the transparent adhesive material can be filled in the groove. Therefore, the process of coating 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 the light-transmitting adhesive material is then filled into the grooves of the light-shielding layer 14 through a leveling and low-pressure defoaming process.

It should be noted that, since the structure formed after step 203 may not be used immediately, in order to prevent the light-transmitting adhesive material coated on one side of the light-shielding layer from being polluted due to being exposed, the light-transmitting adhesive can be coated on the A protective film is attached to one side of the light-shielding layer of the adhesive material, and the protective film can be a releasable protective film, and the releasable protective film can be removed when the structure formed after the step 203 needs to be used.

Step 204 , forming a polarizer on the side of the light shielding layer away from the display panel.

As shown in FIG. 26 , it shows a schematic structural diagram after the polarizer 11 is formed on the 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 where the surface of the display panel 12 is located can cover the surface of the light-emitting area B of the display panel 12 . In the embodiment of the present application, the polarizer 11 provided in the above embodiment can be aligned and attached to the side of the light shielding layer 14 away from the display panel 12.

The polarizer 11 can be aligned and attached to the side of the light shielding layer 14 away from the display panel 12 by using a high-precision alignment and lamination device. Wherein, the alignment accuracy error ΔH of the high-precision alignment and lamination equipment may be: -2 μm≤ΔH≤2 μm. Then, the difference between the width f of the functional area of the polarizer and the width e of a single pixel in a certain direction can be required to be less than or equal to 2 μm, so as to compensate for the above precision error. For example, the high-precision alignment and bonding device may be an optical automatic alignment and bonding device. The process of lamination using optical automatic lamination equipment can 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. Then, the side of the display module from which the protective film is removed is aligned with the side of the polarizer from which the protective film is removed. Afterwards, the aligned display module and the polarizer are turned over by a turn over stage, so that the side of the polarizer from which the protective film is removed is opposite to the side of the display module from which the protective film is removed. fit. Then use ultraviolet light or heating (heating temperature not higher than 85°C) to cure the light-transmitting adhesive material in the groove of the light-shielding layer, so that the side of the light-shielding layer away from the display panel and the polarizer are bonded into one.

It should be noted that, according to the first alignment mark and the second alignment mark, the structure formed after step 203 can be relatively bonded to the polarizer, so that the functional area of the polarizer can be aligned with the display mold. The light-emitting areas of the display panels in the group correspond one-to-one, and the light shielding layers correspond to the non-light-emitting areas of the display panels in the display module one-to-one.

The first alignment mark may refer to the opaque conductive layer pattern formed on the exposed side of the structure formed after step 203 . The orthographic projection of the non-light-transmitting conductive layer image on the plane where the surface of the display panel is located may be located 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 the exposed side of the polarizer. The linear polarizer pattern may be located in the non-functional area of the polarizer.

It should be noted that the transparent substrate used in the above-mentioned manufacturing process of the polarizer may be a flexible substrate, therefore, the above-mentioned step 107 may not be performed in the above-mentioned manufacturing process of the polarizer. When the transparent substrate is a flexible substrate, after the alignment and bonding of the polarizer and the touch functional layer is completed, the entire display module is fabricated.

It should be noted that the above-mentioned touch function layer can also be integrated on the polarizer. When the touch function layer is integrated on the polarizer, the manufacturing process of the touch function layer may refer to the above step 201 accordingly, which is not repeated in this embodiment of the present application. . And when the touch function layer is a finished touch screen, the finished touch screen can be attached to the polarizer 11 and the display panel 12 respectively through a light-transmitting adhesive material.

It should also be noted that the display panel may include: a first electrode layer, a second electrode layer, and a light-emitting layer located between the first electrode layer and the second electrode layer. The first electrode layer and the second electrode layer are used to control the light-emitting layer to emit light. The first electrode layer and the second electrode layer are used to control the light-emitting layer to emit light. Wherein, the second electrode layer is close to the polarizer relative to the first electrode layer. The second electrode layer includes 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 mesh pattern. Correspondingly, the orthographic projection of the polarizer on the plane where the surface of the display panel is located covers the surface of the second electrode layer.

To sum up, the manufacturing method of the display module provided by the embodiment of the present application is due to the linear polarizer layer, the first retardation film layer and the one or more second retardation layers in the polarizer of the display module formed. One or more film layers of the film layer have grooves, and the grooves are filled with a light-transmitting filling material, and the elastic modulus of the light-transmitting filling material is smaller than that of the material of the film layer where the grooves are located. Therefore, the average elastic modulus of one or more film layers in the linear polarizer layer, the first retardation film layer and the one or more second retardation film layers in the polarizer is reduced, thereby reducing the bending of the film layer. The bending force it is subjected to at the time, thereby reducing the probability of the polarizer breaking, and also reducing the probability of the display module breaking.

Further, in the polarizer of the display module, the linear polarizer layer may have a first groove, and/or the first retardation film layer may have a second groove, and/or, the second retardation film layer It can have three grooves, and the grooves are filled with light-transmitting adhesive material, so that the linear polarizer layer can be attached to the first retardation film layer through the adhesive material, and the first retardation film layer can be bonded to the first retardation film layer through the adhesive material. The second retardation film layer is attached. Therefore, there is no need to use an optical adhesive layer to bond the linear polarizer layer, the third retardation film layer and the second retardation film layer, thereby realizing the thinning of the display module and reducing the probability of breakage of the display module. For example, in the embodiment of the present application, the distance between the display panel and the flexible substrate is less than 20 μm.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the structure of the display module manufactured by the above-described manufacturing method of the display module can refer to the specific structure of the display module in the foregoing embodiment, this The application embodiments are not repeated here.

An embodiment of the present application provides a display device, and the display device may include: a casing and any display module provided in the above-mentioned embodiments, the casing at least covering a non-display side of the display module.

Optionally, the display device may further include: a power supply component, where the power supply component is configured to provide 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 can be disposed on the side of the display module, and the power input port can 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 the back of a certain sub-support plate (ie, the side away from the display panel for displaying images), and the power supply battery may be a lithium battery.

The display device provided in the embodiment of the present application may be a flexible display device, and the flexible display device may be a product or component such as an electronic map, electronic paper, mobile phone, tablet computer, display, notebook computer, or wearable device. The flexible display device is also applied to any product or component with a foldable display function. The display device provided in the embodiment of the present application may also be a transparent display device, and the transparent display device may be a transparent window display screen or the like.

It should be noted that, in this application, the terms "first" and "second" are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance.

The term "and/or" in this application is only an association relationship to describe associated objects, which means that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, A and B exist at the same time, independently There are three cases of B.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims (21)

1. A polarizer, characterized in that the polarizer comprises: a linear polarizer layer and a first retardation film layer on one side of the linear polarizer layer; The linear polarizer layer has 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. Elastic Modulus; The orthographic projection of the first retardation film layer on the plane where the surface of the linear polarizer layer is located, covering the surface of the linear polarizer layer, and the first retardation film layer is used to interact with the linear polarizer layer. The layers are matched so that the light passing through the first retardation film layer and exiting 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 intersects with a contact direction, and the contact direction is the The direction in which the contact surface of the linear polarizer layer and the first retardation film layer is located. 3 . The polarizer according to claim 1 , wherein the polarizer is a flexible polarizer, and the horizontal extending direction of the first groove corresponds to a bending line when the flexible polarizer is bent. 4 . direction is parallel. 4 . The polarizer according to claim 1 , wherein the polarizer is used to be attached to a display panel, and the first groove is on a plane where the surface of the display panel is located. 5 . The orthographic projection does not overlap with the surface of the light emitting area of the display panel. 5 . The polarizer according to claim 1 , wherein the first light-transmitting filling material is a light-transmitting adhesive material. 6 . 6 . The polarizer according to claim 1 , wherein the first retardation film layer has a second groove, and the second groove is filled with a second light-transmitting filling material, 6 . The elastic modulus of the second light-transmitting filling material is smaller than the elastic modulus of the material of the first retardation film layer. 7 . The polarizer according to claim 6 , wherein when the reference direction intersects with the contact direction, and the contact direction is where the contact surface of the linear polarizer layer and the first retardation film layer is located. 8 . In the reference direction, the second groove penetrates the first retardation film layer in the reference direction. 8 . The polarizer of claim 6 , wherein the second light-transmitting filling material is a light-transmitting adhesive material. 9 . 9. The polarizer according to any one of claims 1 to 3, wherein the polarizer further comprises: a polarizer that is sequentially stacked on a side of the first retardation film layer away from the linear polarizer layer or a plurality of second retardation film layers, the orthographic projection of each second retardation 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 retardation film layers have third grooves, and the first retardation film has a third groove. 11 . The three grooves are filled with a third light-transmitting filling material, and the elastic modulus of the third light-transmitting filling material is smaller than the elastic modulus of the material of the second retardation film layer. 11 . The polarizer of claim 10 , wherein the third light-transmitting filling material is a light-transmitting adhesive material. 12 . 12. The polarizer according to any one of claims 1 to 3, characterized in that, the polarizer further comprises: a polarizer layered in sequence on the side of the first retardation film layer away from the linear polarizer layer or a plurality of second retardation film layers, a second retardation film layer adjacent to the first retardation film layer in the one or more second retardation film layers has a third groove, and a plurality of first retardation film layers Among the two retardation film layers, the second retardation film layers arranged at intervals have the third grooves, and each third groove is filled with a light-transmitting adhesive material. 13. The polarizer according to any one of claims 1 to 3, wherein the polarizer is in a mesh shape, or the polarizer comprises a plurality of sub-polarizers, and the plurality of sub-polarizers are island-shaped distributed. 14. A display module, wherein the display module comprises: a display panel and the polarizer according to any one of claims 1 to 13; The polarizer is located on the light-emitting side of the display panel, and the orthographic projection of the polarizer 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 according to claim 14 , wherein the display module further comprises: a touch function film layer, the touch function film layer is located between the polarizer and the display panel. 16 . 16 . The display module of claim 15 , wherein the touch function film layer has a fourth groove, the fourth groove is filled with a fourth light-transmitting filling material, and the fourth transparent The elastic modulus of the light filling material is smaller than the elastic modulus of the material of the touch functional film layer. 17 . The display module of claim 16 , wherein the fourth light-transmitting filling material is a light-transmitting adhesive material. 18 . 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, the first electrode layer and the second electrode layer for controlling the display panel to emit light; The second electrode layer is close to the polarizer relative to the first electrode layer, the second electrode layer includes a plurality of second electrodes, and the plurality of second electrodes are distributed in an island shape, or the second electrode layer The electrode layer is in a mesh pattern. 19 . The display module according to claim 18 , wherein the orthographic projection of the polarizer on the plane where the surface of the display panel is located covers the surface of the second electrode layer. 20 . 20. The display module according to any one of claims 15 to 17, wherein the display module further comprises: A light-shielding layer, the light-shielding layer is located between the touch functional 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 different from the surface of the light-emitting area of the display panel. overlapping. 21. A display device, characterized in that the display device comprises: a casing and the display module according to any one of claims 14 to 20, the casing at least covering a non-display side of the display module .

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