WO2020062565A1

WO2020062565A1 - Polarizing structure and display device

Info

Publication number: WO2020062565A1
Application number: PCT/CN2018/119282
Authority: WO
Inventors: 康志聪
Original assignee: 惠科股份有限公司; 重庆惠科金渝光电科技有限公司
Priority date: 2018-09-30
Filing date: 2018-12-05
Publication date: 2020-04-02
Also published as: CN109143675A

Abstract

Disclosed are a polarizing structure and a display device. The polarizing structure comprises an optical compensation film (100) provided with a light incident face (100A) and a light emergent face (100B), and a supporting film (200), a polarizing film (300) and a phase compensation film (400) which are successively stacked on the light emergent face (100B) of the optical compensation film (100), wherein multiple grooves (101) are formed in the light emergent face (100B) of the optical compensation film (100); multiple protruding structures (201) matching the grooves (101) are formed on the supporting film (200); the width of each protruding structure (201) is smaller or close to the wavelength of incident light, and the protruding structure (201) is accommodated in the corresponding groove (101); and the refractive index of the optical compensation film (100) is larger than the refractive index of the supporting film (200).

Description

Polarizing structure and display device

Related applications

This application claims priority from a Chinese patent application filed with the Chinese Patent Office on September 30, 2018, with an application number of 201811162066.5 and an application name of "Polarized Structure and Display Device", the entire contents of which are incorporated herein by reference.

Technical field

The present application relates to the field of display, and in particular to a polarizing structure and a display device.

Background technique

The statements herein merely provide background information related to the present application and do not necessarily constitute prior art.

With the development of display technology, display devices have been widely used in such electronic products due to their advantages such as high picture quality, power saving, and thin body. Among them, the quality of the picture is the most important factor affecting the consumer experience. . The display device is generally composed of a backlight module and a display panel placed on the backlight module. The backlight module provides incident light for the display panel. The incident light is usually concentrated and incident on the display panel. Therefore, when viewing the display screen in the frontal direction, It can obtain better display image quality, but when viewing the display screen in the side view direction, the image quality is poor and the color cast is more serious, which makes the viewing angle of normal display smaller.

Summary of the Invention

A polarizing structure is provided according to various embodiments of the present application.

A polarizing structure includes:

An optical compensation film having a first refractive index, the optical compensation film has a light incident surface and a light exit surface opposite to the light incident surface, and a plurality of grooves are formed on the light exit surface;

The supporting film has a second refractive index, the first refractive index is greater than the second refractive index, and a plurality of convex structures matching the shape and size of the groove are formed on the supporting film. The width of the convex structure is smaller than or close to the wavelength of the incident light, the support film is adhered to the light exit surface of the optical compensation film, and each of the convex structures is received in the corresponding groove;

A polarizing film provided on the supporting film; and

A phase compensation film is provided on the polarizing film.

In a display device, most of the light is incident perpendicularly to the display panel, and the display panel includes a polarizing structure. The polarizing structure includes a polarizing film and a supporting film for supporting and protecting the polarizing film. If the surface of each layer of the polarizing structure is flat and perpendicular to the incident The light is perpendicular to each other, and most of the incident light is emitted perpendicularly when it is perpendicularly incident on the polarizing structure, and most of the light energy is concentrated in a positive viewing angle, which results in a display panel with a good viewing angle and a poor viewing angle. In this solution, a layer of optical compensation film is provided in the polarizing structure, the supporting film is stacked on the optical compensation film, and a groove is formed on the optical compensation film, and a plurality of protrusions matching the groove are formed on the supporting film. Structure, the optical compensation film and the supporting film are closely attached without gaps, and each convex structure is accommodated in a corresponding groove. The optical compensation film has a first refractive index, the supporting film has a second refractive index, and the first refractive index is greater than The second refractive index, that is, the process of penetrating the optical compensation film and incident on the supporting film when the light is incident perpendicularly to the display panel, is a process from light dense to light dense. At the same time, a plurality of convex structures are formed on the side where the support film is in contact with the optical compensation film, and the width of each convex structure is smaller than or close to the wavelength of the incident light. The structure is equivalent to a grating, and the light incident on each convex structure will be diffracted, thereby changing the propagation path of the light, diverging the vertically incident light to the side viewing angle, and improving the image quality of the side viewing angle.

In one embodiment, a width of each of the protruding structures is greater than or equal to 300 nm and less than or equal to 1000 nm.

In one embodiment, each of the convex structures is an elongated convex structure, and each of the elongated convex structures is arranged side by side.

In one embodiment, each of the convex structures is arranged in a two-dimensional matrix array, and the length and width of each of the convex structures are both smaller than or close to the wavelength of incident light.

In one embodiment, each of the raised structures is arranged periodically.

In one embodiment, the center-to-center distance between the adjacent protruding structures is less than or equal to 10 μm.

In one embodiment, the polarizing film has a transmission axis, the optical compensation film is a single optical axis A-compensation film, the single optical axis A-compensation film is filled with nematic liquid crystal molecules, and The optical axis of the nematic liquid crystal molecules is parallel to the transmission axis, and the first refractive index is an abnormal refractive index of the A-compensation film.

In one of the examples, the support film includes a triacetyl cellulose support film.

In one embodiment, the support film includes a polyethylene terephthalate support film.

In one embodiment, the support film includes a polymethyl methacrylate support film.

In one embodiment, the polarizing film includes a polyvinyl alcohol film.

In one of the embodiments, it further includes:

A pressure-sensitive adhesive layer is disposed on the phase compensation film.

In one embodiment, the first refractive index is greater than 1.0 and less than 2.5.

In one embodiment, the second refractive index is greater than 1.0 and less than 2.5.

In one embodiment, a difference between the first refractive index and the second refractive index is greater than 0.01 and less than 1.5.

According to various embodiments of the present application, another polarizing structure is provided.

A polarizing structure includes:

The supporting film has a second refractive index, the first refractive index is greater than the second refractive index, and a plurality of convex structures matching the shape and size of the groove are formed on the supporting film. The convex structures are arranged in a two-dimensional matrix array. The length and width of each of the convex structures are smaller than or close to the wavelength of incident light. The support film is adhered to the light exit surface of the optical compensation film. The raised structures are accommodated in the corresponding grooves, and the center distance between adjacent raised structures is less than or equal to 10 μm;

A polarizing film provided on the supporting film; and

A phase compensation film is provided on the polarizing film.

The above-mentioned polarizing structure can deflect most of the light incident perpendicularly to the polarizing structure to a side viewing angle in a two-dimensional plane, and distributes positive viewing angle energy to the side viewing angle, thereby improving the image quality of the side viewing angle.

A display device is provided according to various embodiments of the present application.

A display device includes:

A backlight module configured to provide a light source; and

A display panel is placed on one side of the backlight module and is set as a display screen;

The display panel includes a polarizing structure, and the polarizing structure includes:

A polarizing film provided on the supporting film; and

A phase compensation film is provided on the polarizing film.

In one embodiment, the display panel is a liquid crystal display panel.

In one embodiment, an included angle between a divergence direction of the incident light generated by the backlight module and a direction perpendicular to the display panel is less than 30 °.

In one embodiment, the backlight module includes a light guide plate, and the upper surface and the lower surface of the light guide plate are each provided with a long V-shaped groove.

Details of one or more embodiments of the present application are set forth in the accompanying drawings and description below. Other features, objects, and advantages of the application will become apparent from the description, the drawings, and the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to better describe and illustrate embodiments and / or examples of those inventions disclosed herein, reference may be made to one or more drawings. The additional details or examples used to describe the drawings should not be considered as limiting the scope of any of the disclosed inventions, the presently described embodiments and / or examples, and the best mode of these inventions as currently understood.

Figure 1 is an exploded view of a polarized structure;

2 is a schematic diagram of diffraction of incident light by a polarizing structure;

3a is a three-dimensional structural view of an optical compensation film in an embodiment;

3b is a schematic perspective view of an optical compensation film in another embodiment;

4a is a partial cross-sectional view of a polarizing structure in an embodiment;

FIG. 4b is a diagram showing the direction relationship between the penetration of the polarizing film and the optical axis of the optical compensation film in FIG. 4a;

FIG. 5 is a schematic structural diagram of a polarizing structure in an embodiment.

6 is a schematic structural diagram of a display device;

FIG. 7 is a schematic structural diagram of a display panel according to an embodiment.

detailed description

In order to facilitate understanding of the present application, the present application will be described more fully with reference to the related drawings. Preferred embodiments of the present application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

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

In order to thoroughly understand the present application, detailed steps and structures will be provided in the following description in order to explain the technical solution proposed in the present application. The preferred embodiments of the present application are described in detail below. However, in addition to these detailed descriptions, the present application may have other implementations.

In an embodiment, as shown in FIG. 1, the polarizing structure includes an optical compensation film 100, a support film 200, a polarizing film 300, and a phase compensation film 400 stacked in this order. The optical compensation film 100 should be transparent and transparent. Or it is made of translucent material and has the function of optical compensation. The optical compensation may specifically be phase compensation. The optical compensation film 100 has a light incident surface 100A and a light emitting surface 100B. The light incident surface 100A is a surface that receives incident light. Light enters the optical compensation film 100 from the light incident surface 100A and exits from the light emitting surface 100B. In this embodiment, a plurality of grooves 101 are formed on the light-emitting surface 100B of the optical compensation film 100. The support film 200 is disposed on the light-emitting surface 100B of the optical compensation film 100. A plurality of shapes corresponding to the grooves 101 are formed on the support film 200. The protruding structures 201 are matched with the size, and each protruding structure 201 can be just embedded in the corresponding groove 101. The width of each convex structure 201 is smaller than or close to the wavelength of the incident light. The supporting film 200 is attached to the light exit surface 100B of the optical compensation film 100, and each convex structure 201 is completely contained in the corresponding groove 101, that is, the optical compensation film. The 100 and the support film 200 are closely adhered without gaps. The optical compensation film 100 has a first refractive index n1, and the supporting film 200 has a second refractive index n2. The first refractive index n1 is greater than the second refractive index n2. When light penetrates the optical compensation film 100 and enters the supporting film 200, the light is emitted from the light. The process of dense into photophosgene. Because the width of each raised structure 201 is smaller than or close to the wavelength of incident light, when the incident light propagates to the raised structure 201, because the width of each raised structure 201 is smaller than or close to the wavelength, the raised structure 201 is equivalent to A grating, where light can be diffracted at the raised structure 201. The polarizing film 300 is stacked on the supporting film 200. After the light penetrates the supporting film 200 and enters the polarizing film 300, the polarizing film 300 polarizes the incident light. Only the light whose direction of the electric field is parallel to the transmission axis of the polarizing film 300 can pass through. The polarizing film 300, that is, the electric field direction of the light emitted from the polarizing film 300 is parallel to the transmission axis of the polarizing film 300. The phase compensation film 400 is stacked on the polarizing film 300, and the phase compensation film 400 can perform phase compensation on light. In the display, the phase delay phenomenon occurs after the light is processed. The phase delay will seriously affect the image quality. A phase compensation film 400 is provided to perform phase compensation before the light exits the display panel, which can avoid the effect of phase delay on the image quality. In one embodiment, the phase compensation film 400 may be an A-compensation film or a C-compensation film or a combination of an A-compensation film and a C-compensation film.

In the display device, since most of the light is incident into the polarized structure vertically, that is, most of the light is perpendicular to the light incident surface, this solution is provided by setting the optical compensation film 100 and the supporting film 200 with different refractive indexes and A convex structure 201 is formed on the side that is in contact with the optical compensation film 100, and each convex structure 201 forms a grating. When incident light is perpendicularly incident from the optical compensation film 100 to the support film 200, diffraction occurs at each convex structure 201 and changes. The propagation path of the vertically incident light deflects the light, so that the light energy of the positive viewing angle is distributed to the large viewing angle, and the image quality of the side viewing angle is improved.

In one embodiment, the polarizing film 300 may be a polyvinyl alcohol film. The polyvinyl alcohol film has high transparency, high elongation performance, and has a polarizing effect on light. In an embodiment, the support film 200 may include a triacetate cellulose (TAC) support film, may also include a polyethylene terephthalate (PET) support film, and may further include polymethyl methacrylate (PMMA ) Supporting film. Since the polarizing film 300 is extremely hydrophilic, a protective film needs to be provided on the surface of the polarizing film 300 to support and protect the physical characteristics of the polarizing film 300. In this solution, the support film 200 and the optical compensation film 100 In addition to the functions, they also form a protective film on the light-incident side of the polarizing film 300, but the supporting film 200 and the optical compensation film 100 need to have appropriate thicknesses to protect the polarizing film 300.

As shown in FIG. 2, the width of each raised structure 201 is X, and the range of X can be 300 nm ≦ X ≦ 1000 nm. When light vertically penetrates the optical compensation film 100 and enters the support film 200, the raised structures 201 Diffraction occurs, that is, the light propagation path changes, and the light deviates from the original perpendicular incidence direction and diverges to the side. Therefore, more light enters the side and improves the image quality of the side viewing angle. It can be understood that the larger the difference between the first refractive index n1 and the second refractive index n2 is, the more obvious the diffraction phenomenon is, and the easier it is to distribute the frontal light type energy to a large viewing angle. In one embodiment, the value range of the first refractive index n1 is 1.0 <n1 <2.5, and the value range of the second refractive index n2 is 1.0 <n2 <2.5. In one embodiment, if m = n1-n2, the value range of m can be 0.01 <m <1.5.

As shown in FIG. 3a, a plurality of protruding structures 201 are formed on the support film 200. Each protruding structure 201 is an elongated protruding structure. Each of the elongated protruding structures 201 can be arranged side by side, and each of the elongated protrusions. The width of the structure 201 is smaller than or close to the wavelength of the incident light. As shown in FIG. 3b, each convex structure 201 can also be arranged in a two-dimensional matrix array, and the width (X direction) and length (Y direction) of each convex structure 201 are both smaller than or close to the wavelength of incident light. Because in the display device, most of the light generated by the backlight module is concentrated and incident on the display panel vertically. If the surface of each layer of the polarizing structure is flat and perpendicular to the normal incident light, the normal incident light will not pass through the polarizing plate. Changing its propagation direction, that is, when the light is incident perpendicularly, it still emits vertically, causing the light to be concentrated at the front view angle, so that the display quality of the front view direction is better, and the side view angle is poor due to the weak light. In this solution, since a plurality of convex structures 201 are provided, each convex structure 201 can diffract normal incident light, and the light deviates from the original normal incident direction and diverges to the side, so more light enters the side Side to improve the quality of the side view angle. When the protruding structures 201 are elongated protruding structures arranged side by side, diffraction occurs only in one dimension (X direction), so that light is scattered to both sides of each protruding structure 201; when each protruding structure 201 is When the two-dimensional rectangular array is arranged, since the length and width of each convex structure 201 are smaller than or close to the wavelength of incident light, diffraction occurs in a two-dimensional plane (X direction and Y direction). In some embodiments, each convex structure 201 is a rectangular parallelepiped convex structure. In other embodiments, each convex structure 201 may also be a convex structure of other forms. The size of each convex structure 201 can make the incident Diffraction of light is sufficient. In one embodiment, the protruding structures are arranged periodically, that is, the centers of adjacent protruding structures 201 are equally spaced. In an embodiment, the center-to-center distance between adjacent convex structures 201 is less than or equal to 10 μm, that is, smaller than the opening width of a general pixel, that is, each pixel opening corresponds to at least one convex structure 201 that deflects the pixel light.

The polarizing film 300 has an absorption axis and a transmission axis. Polarized light having an electric field direction parallel to the transmission axis can pass through the polarizing film 300, that is, the direction of the electric field of the linearly polarized light passing through the polarizing film 300 is parallel to the transmission axis. In one embodiment, the optical compensation film 100 may be a single optical axis liquid crystal film. The single optical axis liquid crystal film is filled with liquid crystal molecules and the optical axes of the liquid crystal molecules are parallel, so that the liquid crystal film has a single optical axis characteristic. The optical compensation film 100 The optical axis direction of is the optical axis direction of the internal liquid crystal molecules. Because liquid crystal is a birefringent material, usually, when light enters the liquid crystal, it is refracted into two rays of normal light and abnormal light. Among them, the refractive index of normal light is the normal refractive index, the refractive index of abnormal light is the abnormal refractive index, and the direction of abnormal refraction. The direction of the optical electric field is parallel to the optical axis of the liquid crystal. The normal direction of refraction is the direction in which the optical electric field is perpendicular to the optical axis of the liquid crystal. The direction of abnormal refraction is perpendicular to the direction of normal refraction. Because the polarizing film 300 is provided above the optical compensation film 100, only the light whose electric field direction is parallel to the polarization axis of the polarizing film 300 can pass through the polarizing film 300.

In an embodiment, as shown in FIGS. 4 a and 4 b, the optical compensation film 100 may be a single optical axis A-compensation film, and the single optical axis A-compensation film may be filled with nematic liquid crystal 102 and nematic liquid crystal. 102 is a long rod-shaped liquid crystal. The optical axis 103 of the nematic liquid crystal 102 is parallel to the transmission axis 301 of the polarizing film 300. The abnormal refraction direction of the nematic liquid crystal 102 is the direction of the optical electric field and the optical axis of the nematic liquid crystal 102. 103 parallel direction, that is, the optical field direction of the abnormal refraction of the nematic liquid crystal 102 is parallel to the transmission axis 301 of the polarizing film 300, and the corresponding abnormal refractive index is n1 _e ; the normal refraction direction of the nematic liquid crystal 102 is the optical field direction a direction perpendicular to the optical axis of the nematic

liquid crystal

102, 103, namely the nematic liquid crystal in a normal refractive optical field transmission axis direction 300 of the polarizing film 102 perpendicular to 301, corresponding to the normal refractive index n1 _o. Generally, when incident light enters the optical compensation film 100, the optical electric field is refracted into a component parallel to the optical axis (abnormal refraction) and a component perpendicular to the optical axis (normal refraction). In this embodiment, since the optical axis 103 of the nematic liquid crystal 102 is parallel to the transmission axis 301 of the polarizing film 300, for example, the optical axis 103 of the nematic liquid crystal 102 and the transmission axis 301 of the polarizing film 300 are both in FIG. 4b. In the X direction. In other embodiments, the optical axis 103 of the nematic liquid crystal 102 and the transmission axis 301 of the polarizing film 300 may be in the Y direction in FIG. 4b, so that the optical axis 103 and the transmission axis 301 are parallel. In this embodiment, incident light is refracted into normal light and abnormal light after entering the optical compensation film 100, wherein the electric field direction of the abnormal light is parallel to the X direction, that is, the electric field direction of the abnormal light is parallel to the transmission axis, and the electric field of the normal light The direction is perpendicular to the transmission axis, and only abnormal light can pass through the polarizing film 300, so the first refractive index is the abnormal refractive index n1 _e of the optical compensation film 100. In other embodiments, the optical compensation film 100 may also be another type of liquid crystal film, and it is sufficient that the first refractive index of the optical compensation film 100 is greater than the second refractive index of the supporting film 200, wherein the refractive index corresponding to the first refractive index is Light can penetrate the polarizing film 300, that is, the direction of the electric field of the refracted light is parallel to the direction of the transmission axis of the polarizing film 300. In an embodiment, as shown in FIG. 5, the polarizing structure further includes a pressure-sensitive adhesive layer 500 stacked on the phase compensation film 400. The polarizing structure can be pasted on a glass substrate through the pressure-sensitive adhesive layer 500.

This application also relates to a polarizing structure. As shown in FIG. 1 and FIG. 2, the polarizing structure includes an optical compensation film 100, a support film 200, a polarizing film 300, and a phase compensation film 400 stacked in this order. The light emitting surface 100B of the optical compensation film 100 is formed with a plurality of grooves 101, and the supporting film 200 is provided on the light emitting surface 100B of the optical compensation film 100. The supporting film 200 is formed with a plurality of grooves 101. The protruding structures 201 with matching shapes and sizes can be embedded in the corresponding grooves 101. The protruding structures 201 are arranged in a two-dimensional matrix array. The length and width of each protruding structure 201 are less than or close to the wavelength of incident light, and the center distance Y between adjacent protruding structures 201 is less than or equal to 10 μm. The supporting film 200 is attached to the light-emitting surface 100B of the supporting film 100, and each of the protruding structures 201 is completely contained in the corresponding groove 101, that is, the optical compensation film 100 and the supporting film 200 are closely adhered without a gap. The optical compensation film 100 has a first refractive index n1, the support film 200 has a second refractive index n2, and the first refractive index n1 is larger than the second refractive index n2.

When light penetrates the optical compensation film 100 and enters the support film 200, since the length and width of each convex structure 201 are less than or close to the wavelength, the convex structure 201 is equivalent to a grating, and light may be diffracted at the convex structure 201 , Change the propagation path of the vertically incident light, deflect the light, so that the light energy of the positive viewing angle is distributed to the large viewing angle, and the image quality of the side viewing angle is improved. Each convex structure 201 is arranged in a two-dimensional matrix. Since the length and width of each convex structure 201 are less than or close to the wavelength of incident light, diffraction occurs in a two-dimensional plane. The center distance Y between adjacent convex structures 201 is less than or equal to 10 μm, that is, smaller than the opening width of a general pixel, that is, each pixel opening corresponds to at least one convex structure 201 that deflects the pixel light.

The present application also discloses a display device. As shown in FIG. 6, the display device includes a backlight module 2 and a display panel 1 disposed on one side of the backlight module 2. The display panel 1 includes the above-mentioned polarizing structure. The backlight module 2 is configured to provide a light source. The light source may be a collimated light source. The light source generates incident light, which is incident on the display panel 1 in a concentrated manner. The divergent direction of the incident light is at a small angle with the direction perpendicular to the display panel 1. The angle θ may be less than 30 °. Most of the light received by the display panel 1 is normal incident light. Since the display panel 1 includes a polarized structure, a support film 200 and an optical compensation film 100 are provided in the polarized structure. The optical compensation film 100 has a first refractive index; Combined with the optical compensation film 100, the supporting film 200 has a second refractive index, the first refractive index is greater than the second refractive index, and a plurality of convex structures 201 are formed on a side of the supporting film 200 that is in contact with the optical compensation film 100. The raised structure 201 may form a diffraction grating. When the display panel 1 includes the above-mentioned polarizing structure, light enters the display panel 1 perpendicularly and penetrates the polarizing structure, and in the polarizing structure, it will enter from light dense to light dense, and because the width of each convex structure 201 is smaller than or close to At the wavelength, the convex structure 201 is equivalent to a grating. Therefore, a diffraction phenomenon occurs at each convex structure 201, which deflects normal incident light to a side viewing angle, distributes positive viewing angle energy to the side viewing angle, and improves the image quality of the side viewing angle. The specific structure of the polarizing structure has been described in detail above, and is not repeated here. Among them, the backlight module 20 includes a side-type light source 2A and a light guide plate 2B opposite to the side-type light source 2A. The upper and lower surfaces of the light guide plate are provided with long V-shaped grooves, and the side walls of the V-shaped groove 61 on the lower surface of the light guide plate. Parallel to the side-type light source 2A, the length direction of the V-shaped groove 62 on the upper surface of the light guide plate and the length direction of the V-shaped groove 61 on the lower surface are perpendicular to each other.

In an embodiment, as shown in FIG. 7, the display panel is a liquid crystal display panel. The display panel includes an upper polarizing plate 10, a lower polarizing plate 30, and a liquid crystal layer sandwiched between the upper polarizing plate 10 and the lower polarizing plate 30. 20. The liquid crystal layer 20 includes a glass substrate and liquid crystal molecules interposed between the glass substrate. The incident light becomes linearly polarized light after passing through the lower polarizing plate. The liquid crystal layer 20 can reverse the polarization direction of the linearly polarized light and allow the linearly polarized light to pass through the upper polarizing plate to display a picture on the display panel. The lower polarizing plate 30 includes Polarizing structure introduced above. In other embodiments, the display panel may also be an organic light-emitting diode (OLED) display panel, a quantum dot light emitting diode (QLED) display panel, or a curved display panel, and the above-mentioned polarized light panel is included. Structure of other display panels.

The technical features of the embodiments described above can be arbitrarily combined. In order to simplify the description, all possible combinations of the technical features in the above embodiments have not been described. However, as long as there is no contradiction in the combination of these technical features, It should be considered as the scope described in this specification.

The above-mentioned embodiments only express several implementation manners of the present application, and their descriptions are more specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be noted that, for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of this application patent shall be subject to the appended claims.

Claims

A polarizing structure includes:

An optical compensation film having a first refractive index, the optical compensation film has a light incident surface and a light exit surface opposite to the light incident surface, and a plurality of grooves are formed on the light exit surface;

The supporting film has a second refractive index, the first refractive index is greater than the second refractive index, and a plurality of convex structures matching the shape and size of the groove are formed on the supporting film. The width of the convex structure is smaller than or close to the wavelength of the incident light, the support film is adhered to the light exit surface of the optical compensation film, and each of the convex structures is received in the corresponding groove;

A polarizing film provided on the supporting film; and

A phase compensation film is provided on the polarizing film.
The polarizing structure according to claim 1, wherein a width of each of the convex structures is greater than or equal to 300 nm and less than or equal to 1000 nm.
The polarizing structure according to claim 1, wherein each of the convex structures is an elongated convex structure, and each of the elongated convex structures is arranged side by side.
The polarizing structure according to claim 1, wherein each of the convex structures is arranged in a two-dimensional matrix array, and a length and a width of each of the convex structures are less than or close to a wavelength of incident light.
The polarizing structure according to claim 1, wherein each of the convex structures is arranged periodically.
The polarizing structure according to claim 1, wherein a center-to-center distance between the adjacent protruding structures is less than or equal to 10 μm.
The polarizing structure according to claim 1, wherein the polarizing film has a transmission axis, the optical compensation film is a single optical axis A-compensating film, and the single optical axis A-compensating film is filled with a nematic phase Liquid crystal molecules, the optical axis of the nematic liquid crystal molecules are parallel to the transmission axis, and the first refractive index is an abnormal refractive index of the A-compensation film.
The polarizing structure according to claim 1, wherein the supporting film comprises a triacetate supporting film.
The polarizing structure according to claim 1, wherein the supporting film comprises a polyethylene terephthalate supporting film.
The polarizing structure according to claim 1, wherein the support film comprises a polymethyl methacrylate support film.
The polarizing structure according to claim 1, wherein the polarizing film comprises a polyvinyl alcohol film.
The polarizing structure according to claim 1, further comprising:

A pressure-sensitive adhesive layer is disposed on the phase compensation film.
The polarizing structure according to claim 1, wherein the first refractive index is greater than 1.0 and less than 2.5.
The polarizing structure according to claim 1, wherein the second refractive index is greater than 1.0 and less than 2.5.
The polarizing structure according to claim 1, wherein a difference between the first refractive index and the second refractive index is greater than 0.01 and less than 1.5.
A polarizing structure includes:

An optical compensation film having a first refractive index, the optical compensation film has a light incident surface and a light exit surface opposite to the light incident surface, and a plurality of grooves are formed on the light exit surface;

The supporting film has a second refractive index, the first refractive index is greater than the second refractive index, and a plurality of convex structures matching the shape and size of the groove are formed on the supporting film. The convex structures are arranged in a two-dimensional matrix array. The length and width of each of the convex structures are smaller than or close to the wavelength of incident light. The support film is adhered to the light exit surface of the optical compensation film. The raised structures are accommodated in the corresponding grooves, and the center distance between adjacent raised structures is less than or equal to 10 μm;

A polarizing film provided on the supporting film; and

A phase compensation film is provided on the polarizing film.
A display device includes:

A backlight module configured to provide a light source; and

A display panel is placed on one side of the backlight module and is set as a display screen;

The display panel includes a polarizing structure, and the polarizing structure includes:

An optical compensation film having a first refractive index, the optical compensation film has a light incident surface and a light exit surface opposite to the light incident surface, and a plurality of grooves are formed on the light exit surface;

The supporting film has a second refractive index, the first refractive index is greater than the second refractive index, and a plurality of convex structures matching the shape and size of the groove are formed on the supporting film. The width of the convex structure is smaller than or close to the wavelength of the incident light, the support film is adhered to the light exit surface of the optical compensation film, and each of the convex structures is received in the corresponding groove;

A polarizing film provided on the supporting film; and

A phase compensation film is provided on the polarizing film.
The display device according to claim 17, wherein the display panel is a liquid crystal display panel.
The display device of claim 17, wherein an included angle between a divergence direction of the incident light generated by the backlight module and a direction perpendicular to the display panel is less than 30 °.
The display device according to claim 17, wherein the backlight module comprises a light guide plate, and the upper surface and the lower surface of the light guide plate are each provided with a long V-shaped groove.