WO2020062568A1 - Polarizing structure and display device - Google Patents

Abstract

A polarizing structure and a display device, the polarizing structure comprising a first optical compensation film (100) having a large refractive index, the first optical compensation film (100) having a light incident surface (100A) and a light exiting surface (100B), a plurality of recesses (101) being formed in the light exiting surface (100B); and a second optical compensation film (200) having a small refractive index and stacked on the light exiting surface (100B) of the first optical compensation film (100), a plurality of protruding structures (201) matching the recesses (101) being formed on the second optical compensation film (200), and the width of each protruding structures (201) being smaller than or close to the wavelength of incident light.

Description

Polarizing structure and display device

Related applications

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on September 30, 2018 with the application number 201821625260.8 and the application name "Polarized Structure, Display Panel and Display Device", the entire contents of which are incorporated herein by reference. Applying.

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:

The first optical compensation film has a first refractive index, the first optical compensation film has a light incident surface and a light exit surface opposite to the light incident surface, and the light exit surface of the first optical compensation film is formed Multiple grooves

A second optical compensation film is formed with a plurality of convex structures that match the shape and size of the groove, and the width of each of the convex structures is smaller than or close to the wavelength of incident light, and the second optical compensation film is bonded. On the light emitting surface of the first optical compensation film, and each of the convex structures is received in a corresponding groove, the second optical compensation film has a second refractive index, and the first refractive index Greater than the second refractive index; and

A polarizing film is disposed on the second optical compensation film.

In the display device, most of the light is perpendicularly incident on the display panel, and the display panel includes a polarizing structure. If the surface of each layer of the polarizing structure is flat and perpendicular to the perpendicularly incident light, most of the incident light is perpendicularly incident on the polarizing plate. It still shoots out vertically, which causes the display panel to have better front view quality and poor side view quality. In this solution, because the first optical compensation film and the second optical compensation film are provided, and the first refractive index is greater than the second refractive index, that is, when the light is incident perpendicularly to the display panel, it penetrates the first optical compensation film and is incident on The process of the second optical compensation film is a process from the light dense to the light dense. At the same time, a plurality of convex structures are formed on the side of the second optical compensation film that is in contact with the first optical compensation film. The width of each convex structure is smaller than or close to the wavelength of the incident light. At this time, the convex structure is equivalent to a grating, and the light incident on the convex structure will be diffracted, thereby changing the propagation path of the light, dispersing 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 polarizing film has a transmission axis, the first optical compensation film is a single optical axis A-compensation film, and the optical axis of the single optical axis A-compensation film and the transmission axis Parallel, the first refractive index is the abnormal refractive index of the A-compensation film, the second optical compensation film is a single optical axis C-compensation film, and the optical axis of the single optical axis C-compensation film is The transmission axis is perpendicular, and the second refractive index is a normal refractive index of the C-compensation film.

In one embodiment, the polarizing structure further includes a first support film, and the first support film is stacked on the light incident surface of the first optical compensation film.

In one embodiment, the polarizing structure further includes a first supporting film, and the first supporting film is disposed between the second optical compensation film and the polarizing film.

In one of the embodiments, the first support film includes a polyethylene terephthalate support film.

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

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

In one embodiment, the first support film includes a triacetyl cellulose support 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.

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

A polarizing structure includes:

The first optical compensation film has a first refractive index, the first optical compensation film has a light incident surface and a light exit surface opposite to the light incident surface, and the light exit surface of the first optical compensation film is formed Multiple grooves

The second optical compensation film is formed with a plurality of convex structures that match the shape and size of the grooves. The width of each of the convex structures is smaller than or close to the wavelength of incident light, and each of the convex structures is periodic. Arranged, the center distance between adjacent convex structures is less than or equal to the opening width of a single pixel, the second optical compensation film is attached to the light emitting surface of the first optical compensation film, and each of the convex structures Received in the corresponding grooves, the second optical compensation film has a second refractive index, the first refractive index is greater than the second refractive index; and

A polarizing film is disposed on the second optical compensation film.

The above-mentioned polarizing structure can deflect most of the light perpendicularly incident on the display panel to the side viewing angle, and distribute the energy of the positive viewing angle 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 incident light;

A display panel is disposed above the backlight module and configured to receive the incident light and display a picture; wherein the display panel includes a polarizing structure, and the polarizing structure includes:

The first optical compensation film has a first refractive index, the first optical compensation film has a light incident surface and a light exit surface opposite to the light incident surface, and the light exit surface of the first optical compensation film is formed Multiple grooves

A second optical compensation film is formed with a plurality of convex structures that match the shape and size of the groove, and the width of each of the convex structures is smaller than or close to the wavelength of incident light, and the second optical compensation film is bonded. On the light emitting surface of the first optical compensation film, and each of the convex structures is received in a corresponding groove, the second optical compensation film has a second refractive index, and the first refractive index Greater than the second refractive index; and

A polarizing film is disposed on the second optical compensation film.

The above display device includes a polarizing structure. By using the polarizing structure, most of the light incident perpendicularly to the display panel can be deflected to the side viewing angle, and the positive viewing angle energy is distributed to the side viewing angle, thereby improving the image quality of the side viewing angle.

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

In one embodiment, the display panel includes:

A first substrate having a light incident side and a light outgoing side;

A second substrate, which is located on the light emitting side of the first substrate and is opposite to the first substrate;

A first polarizing plate formed on a side of the first substrate facing away from the second substrate, the first polarizing plate including the polarizing structure; and

A second polarizing plate is formed on a side of the second substrate facing away from the first substrate.

In one embodiment, the display panel includes:

A first substrate having a light incident side and a light outgoing side;

A second substrate, which is located on the light emitting side of the first substrate and is opposite to the first substrate;

A first polarizing plate formed on a side of the first substrate facing away from the second substrate; and

A second polarizing plate is formed on a side of the second substrate facing away from the first substrate, and the second polarizing plate includes the polarizing structure.

In one embodiment, the display panel includes:

A first substrate having a light incident side and a light outgoing side;

A second substrate, which is located on the light emitting side of the first substrate and is opposite to the first substrate;

A first polarizing plate formed on a side of the first substrate facing away from the second substrate, the first polarizing plate including the polarizing structure; and

A second polarizing plate is formed on a side of the second substrate facing away from the first substrate, and the second polarizing plate includes the polarizing structure.

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 perspective structural view of a second optical compensation film in an embodiment;

3B is a schematic perspective view of a second optical compensation film in another embodiment;

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

FIG. 5 is a direction relationship diagram of the optical axis of the first optical compensation film, the optical axis of the second optical compensation film, and the polarization axis of the polarizing film in an embodiment; FIG.

6 is a schematic structural diagram of a polarizing structure in an embodiment;

7 is a schematic structural diagram of a polarizing structure in another embodiment;

8 is a schematic structural diagram of a display device according to an embodiment;

9 is a cross-sectional view of a display panel structure in an embodiment;

10 is a schematic structural diagram of a second polarizing plate in an embodiment;

FIG. 11 is a schematic structural diagram of a first polarizing plate in 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 a first optical compensation film 100, a second optical compensation film 200, and a polarizing film 300 stacked in this order. The first optical compensation film 100 has a light incident surface 100A. And light exit surface 100B, the light entrance surface 100A is the side that receives incident light, the light enters the first optical compensation film 100 from the light entrance surface and exits from the light exit surface 100B, and a plurality of recesses are formed on the light exit surface 100B of the first optical compensation film Slot 101. The second optical compensation film is stacked on the light emitting surface of the first optical compensation film. A plurality of convex structures 201 matching the shape and size of the groove 101 are formed on the second optical compensation film, and the convex structures 201 can be just embedded. Within the groove 101, the width of each of the protruding structures 201 is smaller than or close to the wavelength of the incident light. The second optical compensation film 200 is attached to the first optical compensation film 100, and the protruding structures 201 are completely contained in the corresponding groove 101. That is, there is no gap between the first optical compensation film 100 and the second optical compensation film 200. The first optical compensation film has a first refractive index n1, the second optical compensation film has a second refractive index n2, and the first refractive index n1 is larger than the second refractive index n2.

When light penetrates the first optical compensation film 100 and enters the second optical compensation film 200, it is a process of entering from the light dense to the light dense, and because the width of the convex structure 201 is less than or close to the wavelength of the incident light, when the incident light When propagating to the protruding structure 201, the protruding structure 201 is equivalent to a grating, and light may be diffracted at the protruding structure 201. In the display device, since most of the light is perpendicularly incident into the polarizing structure, that is, most of the light is perpendicular to the light incident surface 100A, in this solution, the first optical compensation film 100 and the second optical compensation film having different refractive indexes are set. 200, and a convex structure 201 is formed on the second optical compensation film 200, and a grating is formed by the convex structure 201. When incident light is perpendicular from the first optical compensation film 100 to the second optical compensation film 200, the convex structure 201 Diffraction occurs everywhere, changing the propagation path of vertically incident light, deflecting 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. The polarizing film 300 is disposed on the second optical compensation film, and can polarize light to form linearly polarized light and exit the polarizing film 300. In one embodiment, the polarizing film 300 is a polyvinyl alcohol film. The polyvinyl alcohol film has high transparency, high elongation performance, and has a polarizing effect on light.

As shown in FIG. 2, the width of each raised structure 201 is X, and the value of X can be 300 nm ≦ X ≦ 1000 nm. When light vertically penetrates the first optical compensation film 100 and enters the second optical compensation film 200, Diffraction occurs at each raised structure 201, 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 second optical compensation film 200. Each protruding structure 201 is an elongated protruding structure 201, and each elongated protruding structure 201 can be arranged side by side. The width of the strip-shaped convex structure 201 is smaller than or close to the wavelength of the incident light. As shown in FIG. 3B, the protruding structures 201 can also be arranged in a two-dimensional matrix array, and the width (X direction) and length (Y direction) of each protruding 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 perpendicularly to the display panel. If the surface of each optical film is flat and perpendicular to the normal incident light, the normal incident light will not change its transmission when it penetrates the polarizing plate. The direction, that is, the light is still emitted perpendicularly when the light is incident perpendicularly, causing the light to be concentrated at the front viewing angle, which makes the display quality of the front viewing direction better, and the side viewing 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 convex structures 201 are elongated convex structures 201 arranged side by side, diffraction occurs only in one dimension (X direction), so that light is scattered to both sides of the convex structures 201; when the convex structures 201 are two 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 201 are arranged periodically, and the centers of adjacent protruding structures 201 are equally spaced. In one embodiment, the center-to-center distance between adjacent convex structures 201 is less than or equal to 10 μm, that is, less than or equal to 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. .

In this solution, the first optical compensation film and the second optical compensation film should be made of a transparent or translucent material that can transmit light and have the function of optical compensation. The optical compensation may specifically be phase compensation. In one embodiment, both the first optical compensation film and the second optical compensation film are filled with liquid crystal. The liquid crystal is a birefringent material. Generally, when light enters the liquid crystal, it is refracted into two rays of normal light and abnormal light. The refractive index corresponding to light is the normal refractive index, the refractive index corresponding to abnormal light is the abnormal refractive index, the direction of abnormal refraction is the direction in which the direction of the optical electric field is parallel to the optical axis of the liquid crystal, and the direction of normal refraction is the direction in which the optical field is perpendicular to the optical axis of the liquid crystal. The abnormal refraction direction is perpendicular to the normal refraction direction. In this embodiment, as shown in FIGS. 4 and 5, the first optical compensation film 100 is a single optical axis A-compensation film. 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, and the optical axes of the nematic liquid crystals 102 are parallel, so that the first optical compensation film 100 has a single optical axis characteristic. The polarizing film 300 has an absorption axis and a transmission axis 301, and polarized light having an electric field direction parallel to the transmission axis 301 can pass through the polarization film 300. In this embodiment, the direction of the transmission axis 301 of the polarizing film 300 is set to the Y direction, and the optical axis 103 of the first optical compensation film 100 is parallel to the light incident surface 100A and parallel to the transmission axis 301 of the polarizing film, that is, the first The optical axis of the optical compensation film 100 is the Y direction. The abnormal refraction direction of the nematic liquid crystal 102 is a direction in which the direction of the optical electric field is parallel to the optical axis of the nematic liquid crystal 102, that is, the direction of the abnormal electric field of the nematic liquid crystal 102 is parallel to the transmission axis 301 of the polarizing film 300. The corresponding anomalous refractive index is n1 _e . The second optical compensation film 200 is a single optical axis C-compensation film, and the single optical axis C-compensation film can be filled with dish-shaped liquid crystals 202. The optical axis 203 of each dish-shaped liquid crystal 202 is parallel to make the second optical compensation film 200 present a single light. The optical axis of the dish-shaped liquid crystal 202 is perpendicular to the light incident surface 100A, that is, the optical axis 203 of the second optical compensation film 200 is perpendicular to the light incident surface 100A. The direction of the optical axis 203 of the second optical compensation film 200 is shown in the figure. Z direction. The normal refraction directions of the dish-shaped liquid crystal 202 are the directions in which the direction of the optical electric field is perpendicular to the optical axis of the dish-shaped liquid crystal 203, that is, the directions of the light fields in the normal refraction of the dish-shaped liquid crystal 202 may be parallel to the light incident surface 100A, corresponding to The normal refractive index is n2 _o . In this embodiment, the first refractive index is the abnormal refractive index n1 _e of the A-compensation film, and the second refractive index is the normal refractive index n2 _o of the C-compensation film. Since the polarizing film 300 is provided above the second compensation film 200, only light having an electric field direction parallel to the transmission axis 301 of the polarizing film 300 can pass through the polarizing film 300. The abnormal electric field direction of the first optical compensation film 100 and the second The normal electric field direction of the optical compensation film 200 is parallel to the transmission axis, so the abnormal refractive index n1 _e of the first optical compensation film 100 is selected as the first refractive index, and the normal refractive index n2 _o of the second optical compensation film 200 is selected as The second refractive index, n1 _e > n2 _o . In one embodiment, the single optical axis C-compensating film is a single optical axis negative C-compensating film, and the normal refractive index of the single optical axis negative C-compensating film is greater than the abnormal refractive index. Due to the phenomenon of phase retardation after the light is processed, in this solution, when the refractive index of the single optical axis A-compensation film and the single optical axis C-compensation film are different to deflect the normal incident light, the single light The axis A-compensation film and the single-optical axis C-compensation film also constitute a dual-optical axis phase compensation film, which can phase compensate light and avoid the effect of phase delay on the image quality.

In an embodiment, as shown in FIG. 6, the polarizing structure further includes a first support film 900. The first support film 900 may be a triacetate cellulose (TAC) support film, or may be polyethylene terephthalate. Ester (PET) support film, and also polymethyl methacrylate (PMMA) support film. In the polarizing structure, polyvinyl alcohol is usually used as the polarizing film 300, and polyvinyl alcohol has extremely strong hydrophilicity. The first supporting film 900 is provided to protect the physical characteristics of the polarizing film. In one embodiment, the first supporting film 900 may be stacked on the light incident surface of the first optical compensation film 100. In another embodiment, as shown in FIG. 7, the first support film 900 may be disposed between the second optical compensation film 200 and the polarizing film 300. In other embodiments, a support film may not be provided on the light incident side of the polarizing film 300. Since the first optical compensation film 100 and the second optical compensation film 200 are provided on the light incident side of the polarizing film 300, the first optical compensation film 100 and the first The two optical compensation films 200 can not only deflect light, but also serve as a protective layer to protect the polarizing film 300. Therefore, the supporting film on the light incident side of the polarizing film 300 can be omitted in the polarizing structure, which is beneficial to the thin design of the product. It should be noted that the first optical compensation film 100 and the second optical compensation film 200 need to have a proper thickness to achieve the protective effect on the polarizing film.

The present application also relates to a polarizing structure. As shown in FIG. 1, the polarizing structure includes a first optical compensation film 100, a second optical compensation film 200, and a polarizing film 300 that are sequentially stacked. The first optical compensation film 100 has a light incident surface 100A and a light emitting surface 100B. The first optical compensation film 100B has a plurality of grooves 101 formed thereon. The second optical compensation film 200 is stacked on the first optical compensation film 100. On the light emitting surface, the second optical compensation film 200 is formed with a plurality of convex structures 201 matching the shape and size of the groove 101. The width of each convex structure 201 is smaller than or close to the wavelength of the incident light, and the convex structures are periodic. Arranged, the center distance between adjacent convex structures is less than or equal to the opening width of a single pixel, the second optical compensation film 200 is attached to the first optical compensation film 100, and each convex structure 201 is completely contained in the corresponding groove 101 The first optical compensation film 100 has a first refractive index n1, the second optical compensation film 200 has a second refractive index n2, and the first refractive index n1 is greater than the second refractive index n2.

When light penetrates the first optical compensation film 100 and enters the second optical compensation film 200, it is a process from the light dense to the light dense. The light can be diffracted at the convex structure 201 to deflect the light, so that The light energy of the positive viewing angle is distributed to the large viewing angle, improving the image quality of the side viewing angle.

The present application also discloses a display device. As shown in FIG. 8, the display device includes a backlight module 2 and a display panel 1 disposed above the backlight module 2. The display panel 1 includes the polarized structure described above. The backlight module 2 is configured to provide incident light, which is incident on the display panel 1 in a concentrated manner, and a divergence direction of the incident light forms a small angle θ with a direction perpendicular to the display panel 1, and the small angle θ may be less than 30 °. Most of the light received by the display panel 1 is normal incident light. Since the first optical compensation film 100 and the second optical compensation film 200 exist in the display panel 1 and the convex structure 201 is formed on the second optical compensation film, Diffraction at the lifting structure 201 can deflect the vertically incident light, thereby allocating the energy of the positive viewing angle to the side viewing angle and improving the image quality of the side viewing angle. The polarizing structure in the display panel 1 has been described above, and is not repeated here. 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 2B are provided with long V-shaped grooves, and the V-shaped grooves on the lower surface of the light guide plate 2B. The side wall of the light guide plate 2B is parallel to the side-type light source 2A, and the side wall of the V-shaped groove on the upper surface of the light guide plate 2B is perpendicular to the side light source 2A. The longitudinal directions of the grooves are perpendicular to each other.

In an embodiment, the display panel includes a first substrate, a second substrate, a first polarizing plate, and a second polarizing plate, wherein the first substrate has a light incident side and a light emitting side, and the second substrate is located on the light emitting side of the first substrate. And disposed opposite to the first substrate, a first polarizing plate is formed on a side of the first substrate facing away from the second substrate, a second polarizing plate is formed on a side of the second substrate facing away from the first substrate, the first polarizing plate and / Or the second polarizing plate includes a polarizing structure. The polarizing structure has been described in detail above, and is not repeated here.

In the display panel, light passes through the first polarizing plate, the first substrate, the second substrate, and the second polarizing plate in order, and finally displays a picture. Because the polarizing plate contains a polarizing structure, at the polarizing structure, the light will be refracted, which deflects the normal incident light to the side viewing angle, distributes the energy of the positive viewing angle to the side viewing angle, and improves the image quality of the side viewing angle.

In an embodiment, as shown in FIG. 9, the display panel 1 may be a liquid crystal display panel. The liquid crystal display panel includes a second polarizing plate 10, a first polarizing plate 30, a second substrate 22 supporting the second polarizing plate 10, The first substrate 21 supporting the first polarizing plate 30 and the liquid crystal 23 sandwiched between the first substrate 21 and the second substrate 22, wherein the first substrate 21, the second substrate 22, and the first substrate 21 and the first substrate 21 The liquid crystal between the two substrates 22 constitutes the liquid crystal layer 20. The incident light passes through the first polarizing plate 30 and becomes linearly polarized light. 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 second polarizing plate 10 to display a picture on the display panel.

The second polarizing plate 10 includes the polarizing structure described above, or the first polarizing plate 30 includes the polarizing structure described above, or both the second polarizing plate 10 and the first polarizing plate 30 include the polarizing structure described above. In an embodiment, when the polarizing structure is located in the second polarizing plate 10, as shown in FIG. 10, the second polarizing plate 30 includes a second supporting film 400, an anti-reflection layer 500, and a first A pressure-sensitive adhesive layer 600, wherein a second support film 400 is stacked on the polarizing film 300, an anti-reflection layer 500 is stacked on the second support film 400 and is located on the top layer of the second polarizing plate 10, and the first pressure-sensitive adhesive The layer 600 is disposed on the light incident surface of the first optical compensation film 100, that is, the second polarizing plate 10 includes the first pressure-sensitive adhesive layer 600, the first optical compensation film 100, and the second optical compensation film in this order from the light entering to the light emitting direction. 200, a polarizing film 300, a second supporting film 400, and an anti-reflection layer 500. The second polarizing plate 10 is pasted on the second substrate 22 through the first pressure-sensitive adhesive layer 600. The first optical compensation film 100 may be a first single optical axis A-compensation film, and the second optical compensation film 200 may be a second single optical axis A-compensation film or a single optical axis C-compensation film. The optical compensation film 100 and the second optical compensation film 200 have different refractive indexes and deflect perpendicularly incident light. At the same time, the first optical compensation film 100 and the second optical compensation film 200 also constitute a dual optical axis phase compensation film, which can correct light rays. Perform phase compensation to avoid the influence of phase delay on image quality.

In another embodiment, when the polarizing structure is located in the first polarizing plate, as shown in FIG. 11, in addition to the polarizing structure described above, the first polarizing plate 30 further includes a phase compensation film 700 and a second pressure sensitive layer stacked in this order. An adhesive layer 800, in which the phase compensation film 700 is stacked on the polarizing film 300, and the second pressure-sensitive adhesive layer 800 is stacked on the phase compensation film 700, that is, the first polarizing plate 30 includes the first in order from the incident light direction to the outgoing light direction. The optical compensation film 100, the second optical compensation film 200, the polarizing film 300, the phase compensation film 700, and the second pressure-sensitive adhesive layer 800. The phase compensation film 700 is used for phase compensation of light, and the second pressure-sensitive adhesive layer 800 is used for attaching the first polarizing plate 30 to the first substrate 21.

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 includes the above-mentioned polarized light. 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 (20)

A polarizing structure includes: The first optical compensation film has a first refractive index, the first optical compensation film has a light incident surface and a light exit surface opposite to the light incident surface, and the light exit surface of the first optical compensation film is formed Multiple grooves A second optical compensation film is formed with a plurality of convex structures that match the shape and size of the groove, and the width of each of the convex structures is smaller than or close to the wavelength of incident light, and the second optical compensation film is bonded. On the light emitting surface of the first optical compensation film, and each of the convex structures is received in a corresponding groove, the second optical compensation film has a second refractive index, and the first refractive index Greater than the second refractive index; and A polarizing film is disposed on the second optical compensation 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 the polarizing film has a transmission axis, the first optical compensation film is a single optical axis A-compensation film, and the optical axis of the single optical axis A-compensation film is The transmission axis is parallel, the first refractive index is an abnormal refractive index of the A-compensation film, the second optical compensation film is a single optical axis C-compensation film, and the single optical axis C-compensation film The optical axis of is perpendicular to the transmission axis, and the second refractive index is a normal refractive index of the C-compensation film. The polarizing structure according to claim 1, wherein the polarizing structure further comprises a first supporting film, and the first supporting film is stacked on the light incident surface of the first optical compensation film. The polarizing structure according to claim 1, wherein the polarizing structure further comprises a first supporting film, and the first supporting film is disposed between the second optical compensation film and the polarizing film. The polarizing structure according to claim 8, wherein the first supporting film comprises a polyethylene terephthalate supporting film. The polarizing structure according to claim 1, wherein the polarizing film is a polyvinyl alcohol film. The polarizing structure according to claim 8, wherein the first supporting film comprises a polymethyl methacrylate supporting film. The polarizing structure according to claim 8, wherein the first support film comprises a triacetate cellulose support 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. A polarizing structure includes: The first optical compensation film has a first refractive index, the first optical compensation film has a light incident surface and a light exit surface opposite to the light incident surface, and the light exit surface of the first optical compensation film is formed Multiple grooves The second optical compensation film is formed with a plurality of convex structures that match the shape and size of the grooves. The width of each of the convex structures is smaller than or close to the wavelength of incident light, and each of the convex structures is periodic. Arranged, the center distance between adjacent convex structures is less than or equal to the opening width of a single pixel, the second optical compensation film is attached to the light emitting surface of the first optical compensation film, and each of the convex structures Received in the corresponding grooves, the second optical compensation film has a second refractive index, the first refractive index is greater than the second refractive index; and A polarizing film is disposed on the second optical compensation film. A display device includes: A backlight module configured to provide incident light; and A display panel is disposed above the backlight module and configured to receive the incident light and display a picture; the display panel includes a polarizing structure, and the polarizing structure includes: The first optical compensation film has a first refractive index, the first optical compensation film has a light incident surface and a light exit surface opposite to the light incident surface, and the light exit surface of the first optical compensation film is formed Multiple grooves A second optical compensation film is formed with a plurality of convex structures that match the shape and size of the groove, and the width of each of the convex structures is smaller than or close to the wavelength of incident light, and the second optical compensation film is bonded. On the light emitting surface of the first optical compensation film, and each of the convex structures is received in a corresponding groove, the second optical compensation film has a second refractive index, and the first refractive index Greater than the second refractive index; and A polarizing film is disposed on the second optical compensation film. The display device according to claim 16, wherein the display panel is a liquid crystal display panel. The display device according to claim 16, wherein the display panel comprises: A first substrate having a light incident side and a light outgoing side; A second substrate, which is located on the light emitting side of the first substrate and is opposite to the first substrate; A first polarizing plate formed on a side of the first substrate facing away from the second substrate, the first polarizing plate including the polarizing structure; and A second polarizing plate is formed on a side of the second substrate facing away from the first substrate. The display device according to claim 16, wherein the display panel comprises: A first substrate having a light incident side and a light outgoing side; A second substrate, which is located on the light emitting side of the first substrate and is opposite to the first substrate; A first polarizing plate formed on a side of the first substrate facing away from the second substrate; and A second polarizing plate is formed on a side of the second substrate facing away from the first substrate, and the second polarizing plate includes the polarizing structure. The display device according to claim 16, wherein the display panel comprises: A first substrate having a light incident side and a light outgoing side; A second substrate, which is located on the light emitting side of the first substrate and is opposite to the first substrate; A first polarizing plate formed on a side of the first substrate facing away from the second substrate, the first polarizing plate including the polarizing structure; and A second polarizing plate is formed on a side of the second substrate facing away from the first substrate, and the second polarizing plate includes the polarizing structure.

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