WO2020062585A1

WO2020062585A1 - Polarizer and display device

Info

Publication number: WO2020062585A1
Application number: PCT/CN2018/119656
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: 2018-12-07
Publication date: 2020-04-02
Also published as: CN109100825A

Abstract

A polarizer (200) comprises a first uniaxial optical film (210), a second uniaxial optical film (220) and a polarization layer (230). The second uniaxial optical film is provided above the first uniaxial optical film. The second uniaxial optical film has an extraordinary refractive index greater than an ordinary refractive index of the first uniaxial optical film. The second uniaxial optical film comprises a plate portion (221) and multiple prism portions (222) formed at one side of the plate and arranged at intervals. The multiple prism portions are received in the first uniaxial optical film. The prism portion is selected from one of a triangular prism structure and a triangular pyramidal structure. The polarization layer is attached to one side of the plate portion away from the prism portions (222).

Description

Polarizer and display device

Cross-reference to 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 201811161983.1 and an invention name of "Polarizer and Display Device", the entire contents of which are incorporated herein by reference.

Technical field

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

Background technique

Exemplary large-size display panels include an LCD (Liquid Crystal Display) panel and an OLED (Organic Light-Emitting Diode) panel, etc., where the LCD panel includes a VA (Vertical Vertical Alignment) liquid crystal panel and IPS (In-Plane Switching) LCD panels, etc. Compared with IPS LCD panels, VA LCD panels have the advantages of higher production efficiency and lower manufacturing costs, but they are more obvious in optical properties than IPS LCD panels. Defective optical properties, especially for large-size panels that require large viewing angles for commercial applications. VA-type LCD panels quickly saturate the brightness at large viewing angles with voltage, which causes the viewing angle image quality contrast and color shift to deteriorate more seriously than the front-view image quality. There is a problem of color cast.

The VA liquid crystal technology solves the problem of viewing role deviation by subdividing R (Red, Red), G (Green, Green), and B (Blue, Blue) sub-pixels into primary and secondary pixels, so that the overall large viewing angle brightness changes with voltage. It is closer to the front view. This method of providing different driving voltages to solve the defect of viewing role deviation is given by the primary and secondary pixels in space. It is often necessary to redesign metal traces or switching elements to drive the sub-pixels, causing sacrifices in the light-transmissive opening area. Affects panel penetration.

Summary of the Invention

The present application provides a polarizer capable of improving viewing role polarization and having better panel transmittance.

In addition, a display device is provided.

A polarizer includes:

A first single optical axis optical film layer;

A second single optical axis optical film layer disposed on the first single optical axis optical film layer, and an extraordinary light refractive index of the second single optical axis optical film layer is greater than the first single optical axis optical film layer Ordinary light refractive index, the second single optical axis optical film layer includes a plate-shaped portion and a plurality of spaced-apart prism portions formed on one side of the plate-shaped portion, and the plurality of prism portions are housed in the space. In the first single optical axis optical film layer, a plurality of the prism portions are selected from one of a triangular prism structure and a triangular pyramid structure. When a plurality of the prism portions are triangular prism structures, One side surface of the prism portion is attached to the plate-like portion, and when a plurality of the prism portions are triangular pyramid structures, a bottom surface of each of the prism portions is attached to the plate-like portion;

A polarizing layer is laminated on a side of the plate-like portion remote from the prism portion.

A polarizer includes:

A first single optical axis optical film layer;

A second single optical axis optical film layer disposed on the first single optical axis optical film layer, and an extraordinary light refractive index of the second single optical axis optical film layer is greater than the first single optical axis optical film layer Ordinary light refractive index, the second single optical axis optical film layer includes a plate-shaped portion and a plurality of spaced-apart prism portions formed on one side of the plate-shaped portion, and the plurality of prism portions are housed in the space. In the first single-optical-axis optical film layer, a plurality of the prism portions are triangular prism structures, and the plurality of prism portions are arranged in parallel along a straight line, and one side surface of each of the prism portions is in contact with the The plate-shaped portions are abutted, and a distance between two adjacent side edges of the prism portion away from the plate-shaped portion is greater than or equal to two sides of each of the prism portions near the plate-shaped portion. Distance between edges

A display device includes a backlight source, a display panel, and the above-mentioned polarizer, wherein the display panel is located on one side of the backlight source, and the polarizer is located between the display panel and the backlight source; or The polarizer is located on a side of the display panel away from the backlight.

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

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

2 is a schematic structural diagram of a backlight source of the display device shown in FIG. 1;

3 is a schematic structural diagram of a polarizer of the display device shown in FIG. 1;

4 is a schematic structural diagram of a second single optical axis optical film layer of the polarizer shown in FIG. 3;

5 is a schematic structural view of the second single optical axis optical film layer at another angle shown in FIG. 4;

6 is a schematic structural view of the second single optical axis optical film layer at another angle shown in FIG. 4;

7 is a schematic structural diagram of a second single optical axis optical film layer of another embodiment of the polarizer shown in FIG. 3;

8 is a schematic structural view of the second single optical axis optical film layer of FIG. 7 at another angle;

9 is a schematic structural view of the second single optical axis optical film layer at another angle shown in FIG. 7;

10 is a schematic structural diagram of a first single optical axis optical film layer and a second single optical axis optical film layer of the polarizer shown in FIG. 3;

11 is a schematic structural diagram of a polarizer of another embodiment of the display device shown in FIG. 1;

FIG. 12 is a schematic structural diagram of an upper polarizer of the display device shown in FIG. 1.

detailed description

This application provides a polarizer and a display device. In order to make the purpose, technical solution, and effect of this application clearer and more specific, the application is described in further detail below. It should be understood that the specific embodiments described herein are only used to explain the application, and are not used to limit the application.

Referring to FIG. 1, a display device 10 according to an embodiment includes a backlight 100, a polarizer 200, a display panel 300, and a polarizer 400.

Among them, the backlight source 100 is a collimated backlight light source (BL), so that the energy of the light is concentrated and output at a positive viewing angle.

Please refer to FIG. 2 together. Specifically, the backlight 100 includes a reflection sheet 110, a light guide plate 120, a prism film 130, and an LED light source 140, and the reflection sheet 110, the light guide plate 120, and the prism film 130 are sequentially stacked. The light surface 121 and the LED light source 140 are disposed opposite to the light incident surface 121. A side of the light guide plate 120 near the reflective sheet 110 is provided with a strip-shaped first groove 122. The cross-section of the first groove 122 is V-shaped and the first concave The extending direction of the groove 122 is perpendicular to the light emitting direction of the LED light source 140. A side of the light guide plate 120 near the prism film 130 is provided with a strip-shaped second groove 123. The cross-section of the second groove 123 is V-shaped, and the second groove The extending direction of 123 is parallel to the light emitting direction of the LED light source 140. In one embodiment, the prism side of the prism film 130 is laminated on the light guide plate 120.

Please refer to FIG. 3 together. The polarizer 200 is located on one side of the backlight 100. Specifically, the polarizer 200 includes a first single optical axis optical film layer 210, a second single optical axis optical film layer 220, a polarizing layer 230, a first compensation film layer 240, a first pressure-sensitive adhesive layer 250, and a first protective layer. 260.

The first single-optical-axis optical film layer 210 has optical anisotropy, and light passing through the first single-optical-axis optical film layer 210 may cause a birefringence phenomenon. The light rays entering the first single-optical-axis optical film layer 210 can be equivalent to two light rays whose vibration directions are perpendicular to each other. The light rays that are perpendicular to the optical axis of the first single-optical-axis optical film layer 210 are called ordinary rays. O light; light that is parallel to the optical axis of the first single optical axis optical film layer 210 is referred to as extraordinary light, and is referred to as E light. In an embodiment, the extraordinary light refractive index (ne1) is the equivalent refractive index of the optical axis of the first single optical axis optical film layer 210 parallel to the direction of electric field vibration; the ordinary light refractive index (no1) is the first single light The equivalent refractive index of the optical axis of the axial optical film layer 210 perpendicular to the direction of electric field vibration. Specifically, the material of the first single optical axis optical film layer 210 is a dish-shaped liquid crystal molecular material.

In one embodiment, the ordinary light refractive index of the first single optical axis optical film layer 210 is 1.0-2.5.

The second single optical axis optical film layer 220 is disposed on the first single optical axis optical film layer 210. The second single-optical-axis optical film layer 220 has optical anisotropy, and light passing through the second single-optical-axis optical film layer 220 may cause a birefringence phenomenon. The light rays entering the second single-optical-axis optical film layer 220 can be equivalent to two light rays whose vibration directions are perpendicular to each other. The light rays perpendicular to the optical axis of the second single-optical-axis optical film layer 220 are called ordinary rays. O light; light that is parallel to the optical axis of the second single optical axis optical film layer 220 is referred to as extraordinary light, and is referred to as E light. In an embodiment, the extraordinary light refractive index (ne2) is an equivalent refractive index of the optical axis of the second single optical axis optical film layer 220 parallel to the electric field vibration direction; the ordinary light refractive index (no2) is the second single light The equivalent refractive index of the optical axis of the axial optical film layer 220 is perpendicular to the direction of electric field vibration. Specifically, the material of the second single optical axis optical film layer 220 is a nematic liquid crystal molecular material.

In one embodiment, the extraordinary light refractive index of the second single-optical-axis optical film layer 220 is 1.0 to 2.5, so as to distribute the energy of the front-view light to a large viewing angle.

Optionally, the extraordinary light refractive index of the second single-optical-axis optical film layer 220 is greater than the ordinary light refractive index of the first single-optical-axis optical film layer 210. Specifically, the difference between the extraordinary refractive index of the second single optical axis optical film layer 220 and the refractive index of the first single optical axis optical film layer 210 is 0.01 to 1.5. The larger the difference between the extraordinary refractive index of the second single-optical-axis optical film layer 220 and the refractive index of the first single-optical-axis optical film layer 210 is, the easier it is to allocate frontal light energy to a large viewing angle.

Please refer to FIG. 4 together. Specifically, the second single optical axis optical film layer 220 includes a plate-shaped portion 221 and a plurality of prism portions 222.

The plate-like portion 221 is laminated on the first single-optical-axis optical film layer 210.

A plurality of prism portions 222 are formed on one side of the plate-like portion 221 and are disposed at intervals. The plurality of prism portions 222 are housed in the first single optical axis optical film layer 210. The plurality of prism portions 222 are located on the plate-shaped portion 221 on the side of the first single optical axis optical film layer 210. Specifically, each of the plurality of prism portions 222 is a triangular prism structure or a triangular pyramid structure.

When the plurality of prism portions 222 have a triangular prism structure, one side surface of each prism portion 222 is in contact with the plate-shaped portion 221. In one embodiment, the plurality of prism portions 222 are arranged in parallel. Optionally, the plurality of prism portions 222 are arranged in parallel along a straight line, and the distance between the side edges of two adjacent prism portions 222 away from the plate-shaped portion 221 is greater than or equal to that of the prism portion 222 near the plate-shaped portion 221. The distance between two side edges. For example, please refer to FIG. 5 and FIG. 6 together. The distance (Px1) between the side edges of two adjacent prism portions 222 away from the plate-shaped portion 221 is greater than or equal to two of the prism portion 222 near the plate-shaped portion 221. The distance (Lx1) between the side edges; D + d is the maximum thickness of the second single optical axis optical film layer 220.

Wherein, the optical axis direction (long axis direction) of the liquid crystal in the single-optical-axis optical film layer 220 is parallel to the light emitting surface or the light incident surface, which may be parallel to the arrangement direction of the plurality of prism portions 222 and perpendicular to each prism portion 222. The extending direction of the prisms may be perpendicular to the arrangement direction of the plurality of prism portions 222 and parallel to the extending direction of each prism portion 222. The transmissive polarization direction of the apparent polarization layer 230 determines the extraordinary light direction refractive index (ne2) and the ordinary light direction refractive index (no2). That is, the optical axis direction (long axis direction) of the liquid crystal in the second single optical axis optical film layer 220 is parallel to the transmission axis direction of the polarizing layer 230, and the optical axis direction (long axis) of the liquid crystal in the second single optical axis optical film layer 220 (Axis direction) is perpendicular to the short axis direction of the liquid crystal in the second single optical axis optical film layer 220. Therefore, the transmission axis direction of the polarizing layer 230 determines the extraordinary light direction refractive index (ne2) and the ordinary light direction refractive index (no2). .

When the plurality of prism portions 222 are arranged in parallel, the side edges of the plurality of prism portions 222 are parallel to each other. Specifically, each of the plurality of prism portions 222 has a regular triangular prism structure.

In one embodiment, when the plurality of prism portions 222 have a triangular pyramid structure, one bottom surface of each prism portion 222 is in contact with the plate-shaped portion 221. Optionally, the plurality of prism portions 222 are arranged in a two-dimensional matrix to more effectively distribute the light energy of the positive viewing angle to the two-dimensional direction, so that the viewing angle of the display device 10 is more uniform. Among them, please refer to FIGS. 7 to 9 together. Each prism portion 222 has a vertex opposite to the bottom surface, passes through a line between the vertices of two adjacent prism portions 222, and is perpendicular to the two adjacent prism portions. The vertical surface of the bottom surface of 222 intersects the bottom surface of each of the two adjacent prism portions 222, and the length of the line of intersection of the vertical surface and the bottom surface of each of the two adjacent prism portions 222 (Lx2 or Ly) Less than or equal to the length of the line (Px2 or Py), that is, Lx2≤Px2, Ly≤Py. Specifically, each of the plurality of prism portions 222 is a regular triangular pyramid structure.

The polarizing layer 230 is laminated on the plate-shaped portion 221 on the side away from the prism portion 222. Among them, the polarizing layer 230 has the functions of absorbing and transmitting polarized light, and the light intensity can be adjusted with the driving of liquid crystal molecules. Specifically, the polarizing layer 230 is a polyvinyl alcohol (PVA) layer.

The first single optical axis optical film layer 210 and the second single optical axis optical film layer 220 form a flat optical film. The first single-optical-axis optical film layer 210 and the second single-optical-axis optical film layer 220 must have a certain thickness to ensure the weather resistance of the polarizing layer 230, prevent the polarizing layer 230 from contacting the external environment, and prevent moisture from affecting the polarizing layer 230. Make an impact.

Depending on the polarization direction of the light emitted from the polarizing layer 230, the extraordinary refractive index (ne2) and ordinary refractive index (no2) of the second single optical axis optical film layer 220 can be selected. When the direction of the transmission axis parallel to the polarization layer 230 is parallel to the x-axis direction, the refractive index of the single optical axis optical film layer 220 is ne2 = nx> no2 = ny, or when the polarization direction of the light emitted from the polarization layer 230 (parallel to the polarization When the transmission axis direction of the layer 230 is parallel to the Y axis direction, the refractive index of the second single optical axis optical film layer 220 is ne2 = ny> no2 = nx, and the film thickness direction (perpendicular to the light emitting surface) is parallel to the Z axis direction. The refractive index of the second single optical axis optical film layer 220 is nz = no2.

Please refer to FIG. 10 together. The principle of allocating light energy with a positive angle of view to a large angle of view is: light propagates from a sparse medium to a light dense medium, that is, light propagates from the first single optical axis optical film layer 210 to the second The single optical axis optical film layer 220 may cause refraction or diffusion due to the difference in refractive index. When the multiple prism portions 222 of the second single optical axis optical film layer 220 are all triangular prism structures or triangular pyramid structures, the direction of travel of light The light that is not perpendicular to the interface between the first single optical axis optical film layer 210 and the second single optical axis optical film layer 220 will allow the light energy of the normal viewing angle to be distributed to the side viewing angle, so that the side viewing angle can enjoy the image quality presentation of the positive viewing angle. .

The first compensation film layer 240 is laminated on a side of the polarizing layer 230 away from the second single optical axis optical film layer 220. Among them, the first compensation film layer 240 has birefringence, can compensate the polarized light output of the liquid crystal molecules at a large viewing angle, and can also support and protect the polarization layer 230.

The first pressure-sensitive adhesive layer 250 is laminated on a side of the first compensation film layer 240 away from the polarizing layer 230.

The first protective layer 260 is laminated on a side of the first single optical axis optical film layer 210 away from the second single optical axis optical film layer 220. Among them, the first protective layer 260 is a transparent layer, which mainly plays a supporting and protecting role. Specifically, the first protective layer 260 is an organic material layer. More specifically, the first protective layer 260 is selected from one of a polyethylene terephthalate (PET) layer, a cellulose triacetate layer (TAC), and a polymethyl methacrylate (PMMA) layer.

It should be noted that the polarizer 200 is not limited to the above structure, and the first pressure-sensitive adhesive layer 250 layer may be omitted; similarly, the first compensation film layer 240 may be omitted.

It should be noted that the polarizer 200 is not limited to the above structure. Please refer to FIG. 11 together. The first protective layer 260 is laminated between the plate-shaped portion 221 and the polarizing layer 230. In one embodiment, the first protective layer 260 may be omitted.

The working principle of the above-mentioned polarizer 200 is:

When the prism part 222 has a triangular prism structure, light passes through the polarizer 200 before entering the display panel 300. The polarizing layer 230 of the polarizer 200 has the function of absorbing and penetrating polarized light. The light entering the polarizer 200 can be divided into horizontal polarization Component light and vertically polarized component light, when the transmission axis of the polarizer 200 is parallel to the arrangement direction of the plurality of prism portions 222, and the absorption axis is parallel to the extending direction of each prism portion 222, the horizontal polarization of the transmission axis is considered. The role of component light in the first single optical axis optical film layer 210 and the second single optical axis optical film layer 220 (at this time, the refractive index of the second single optical axis optical film layer 220 is ne2 = nx> no2 = ny), and the level is The light of the polarized component passes through the first single optical axis optical film layer 210, and the light of the horizontally polarized component has the equivalent refractive index corresponding to the first single optical axis optical film layer 210, and then passes through the second single optical axis optical film layer 220 , The extraordinary light refractive index corresponding to the second single optical axis optical film layer 220 is ne2, so the horizontally polarized light undergoes light sparse entry into the light dense medium (ne2> no1) at the interface between the two media. Interface with optically dense medium that is not perpendicular to the direction of light travel Light passes through the interface to produce a refraction effect, so that the positive-angle light type energy distribution has a large angle of view.

Similarly, when the transmission axis of the polarizer 200 is parallel to the extending direction of each prism portion 222 and the absorption axis is parallel to the arrangement direction of the plurality of prism portions 222, the light having a vertical polarization component of the transmission axis is considered in the first unit. The optical axis optical film layer 210 and the second single optical axis optical film layer 220 (at this time, the refractive index of the second single optical axis optical film layer 220 is ne2 = ny> no2 = nx), and the light of the vertical polarization component passes through the first The single-optical-axis optical film layer 210 has the equivalent refractive index of the first single-optical-axis optical film layer 210 corresponding to the vertically polarized component light, and then passes through the second single-optical-axis optical film layer 220, corresponding to the second single-light The extraordinary optical refractive index of the axial optical film layer 220 is ne2, so the horizontally polarized light enters the optically dense medium (ne2> no1) at the interface between the two media. The interface where the light advances in a vertical direction. Light passes through the interface to produce a refraction effect, so that the positive-angle light type energy distribution has a large viewing angle.

The display panel 300 is laminated on a side of the polarizer 200 remote from the backlight 100. In one embodiment, the display panel 300 is laminated on a side of the first pressure-sensitive adhesive layer 250 away from the first compensation film layer 240. Specifically, the display panel 300 is a liquid crystal display panel.

The polarizing plate 400 is laminated on a side of the liquid crystal panel 300 away from the polarizer 200. Please refer to FIG. 12 together. Specifically, the polarizing plate 400 includes a second pressure-sensitive adhesive layer 410, a second compensation film layer 420, a polarizing layer 430, a second protective layer 440, an optical film layer 450, and an anti-glare layer that are sequentially stacked. Reflective layer 460.

The materials and functions of the second pressure-sensitive adhesive layer 410 and the first pressure-sensitive adhesive layer 250 are approximately the same; the materials and functions of the second compensation film layer 420 and the first compensation film layer 240 are approximately the same; the polarizing layer 430 and the polarizing layer The materials and functions of 230 are substantially the same; the functions of the second protective layer 440 and the first protective layer 260 are substantially the same, and the material of the second protective layer 440 is an organic material layer. In an embodiment, the second protective layer 440 is selected from one of a high-temperature-resistant polyethylene terephthalate (PET) layer, a cellulose triacetate layer (TAC), and PMMA; the optical film layer 450 may be as required The function is to select the corresponding film; the role of the anti-glare low-reflection layer 460 is to prevent glare and reduce the reflection of light to reduce the energy loss of light.

It should be noted that the display device 10 is not limited to the above structure, and the polarizing plate 400 in the display device 10 may also be a polarizer 200, that is, the polarizer 200 may also be used as an upper polarizer, and is located on a display panel 300 away from the backlight 100 side.

The above display device 10 has at least the following advantages:

The above-mentioned polarizer 200 is provided with a second single optical axis optical film layer 220 between the first single optical axis optical film layer 210 and the polarizing layer 230, and an extraordinary optical refractive index of the second single optical axis optical film layer 220 is greater than that of the first single optical axis optical film layer 220. The ordinary light refractive index of the single-optical-axis optical film layer 210, light is transmitted from the first single-optical-axis optical film layer 210 to the second single-optical-axis optical film layer 220. Due to the difference in refractive index, a phenomenon of refraction or diffusion occurs. The multiple prism portions 222 of the two single-optical-axis optical film layers 220 are all triangular prism structures or triangular pyramid structures, and the direction of travel is not the same as the interface between the first single-optical-axis optical film layer 210 and the second single-optical-axis optical film layer 220. The vertical light allows the light energy of the front viewing angle to be distributed to the side viewing angle, so that the side viewing angle can watch the image quality presentation of the front viewing angle, which solves the problem of the large viewing role of the display device 10; at the same time, the display panel 300 does not need to separate the RGB sub-pixels. Pixels are divided into primary and sub-pixel structures, avoiding the need to design metal traces or TFT elements to drive the sub-pixels, causing sacrifices to the transparent opening area and affecting panel penetration. Therefore, the above-mentioned polarizer 200 can not only improve the viewing role polarization, but also has a better panel transmittance.

It should be understood that the application of the present application is not limited to the above examples. For those of ordinary skill in the art, improvements or changes can be made according to the above description, and all these improvements and changes should fall within the protection scope of the appended claims of the present application.

Claims

A polarizer includes:

A first single optical axis optical film layer;

A second single optical axis optical film layer disposed on the first single optical axis optical film layer, and an extraordinary light refractive index of the second single optical axis optical film layer is greater than the first single optical axis optical film layer Ordinary light refractive index, the second single optical axis optical film layer includes a plate-shaped portion and a plurality of spaced-apart prism portions formed on one side of the plate-shaped portion, and the plurality of prism portions are housed in the space. In the first single optical axis optical film layer, a plurality of the prism portions are selected from one of a triangular prism structure and a triangular pyramid structure. When a plurality of the prism portions are triangular prism structures, One side surface of the prism portion is in contact with the plate-like portion, and when a plurality of the prism portions are in a triangular pyramid structure, a bottom surface of each of the prism portions is in contact with the plate-like portion; and

A polarizing layer is laminated on a side of the plate-like portion remote from the prism portion.
The polarizer according to claim 1, wherein an ordinary light refractive index of the first single optical axis optical film layer is 1.0 to 2.5.
The polarizer according to claim 1, wherein an extraordinary light refractive index of the second single optical axis optical film layer is 1.0 to 2.5.
The polarizer according to claim 1, wherein a difference between an extraordinary optical refractive index of the second single optical axis optical film layer and an ordinary optical refractive index of the first single optical axis optical film layer is 0.01 to 1.5. .
The polarizer according to claim 1, wherein each of the plurality of prism portions has a triangular prism structure, and the plurality of prism portions are arranged in parallel, and two adjacent ones of the prism portions are far from the plate-like portion. The distance between the side edges on one side is greater than or equal to the distance between two side edges of each of the prism portions close to the plate-like portion.
The polarizer according to claim 5, wherein each of the plurality of prism portions has a regular triangular pyramid structure.
The polarizer according to claim 1, wherein each of the plurality of prism portions has a triangular pyramid structure, and the plurality of prism portions are arranged in a two-dimensional matrix, and each of the plurality of prism portions has a surface opposite to the bottom surface. A vertex, passing through a line between the vertices of two adjacent prism portions and perpendicular to a vertical surface of the bottom surface of the two adjacent prism portions and the adjacent two The bottom surface of the prism portion intersects, the vertical surface has an intersection line with the bottom surface of one of the two adjacent prism portions, and the length of the intersection line is less than or equal to the connecting line. length.
The polarizer according to claim 7, wherein each of the plurality of prism portions has a regular triangular pyramid structure.
The polarizer according to claim 1, wherein a material of the first single optical axis optical film layer is a dish-like liquid crystal molecular material.
The polarizer according to claim 1, wherein a material of the second single optical axis optical film layer is a nematic liquid crystal molecular material.
The polarizer according to claim 1, wherein the polarizing layer is a polyvinyl alcohol layer.
The polarizer according to claim 1, further comprising a first protective layer laminated on one of the first single optical axis optical film layer away from the second single optical axis optical film layer. On the side.
The polarizer according to claim 1, further comprising a first protective layer laminated between the plate-like portion and the polarizing layer.
The polarizer according to claim 1, further comprising a first compensation film layer laminated on a side of the polarizing layer remote from the second single optical axis optical film layer.
The polarizer according to claim 14, further comprising a first pressure-sensitive adhesive layer laminated on a side of the first compensation film layer remote from the polarizing layer.
A polarizer includes:

A first single optical axis optical film layer;

A second single optical axis optical film layer disposed on the first single optical axis optical film layer, and an extraordinary light refractive index of the second single optical axis optical film layer is greater than the first single optical axis optical film layer Ordinary light refractive index, the second single optical axis optical film layer includes a plate-shaped portion and a plurality of spaced-apart prism portions formed on one side of the plate-shaped portion, and the plurality of prism portions are housed in the space. In the first single-optical-axis optical film layer, a plurality of the prism portions have a triangular prism structure, a plurality of the prism portions are arranged in parallel along a straight line, and one side surface of each of the prism portions is in contact with the The plate-shaped portions are abutted, and a distance between two adjacent side edges of the prism portion away from the plate-shaped portion is greater than or equal to two sides of each of the prism portions near the plate-shaped portion. Distance between edges

A polarizing layer is laminated on a side of the plate-like portion remote from the prism portion.
A display device includes a backlight source, a display panel, and the polarizer according to claim 1, wherein the display panel is located on one side of the backlight source, and the polarizer is located between the display panel and the backlight source Or, the polarizer is located on a side of the display panel away from the backlight.
The display device according to claim 17, wherein the backlight source is a collimated backlight light source.
The display device according to claim 17, wherein the backlight source comprises a reflective sheet, a light guide plate, a prism film, and an LED light source, the reflective sheet, the light guide plate, and the prism film are sequentially stacked and arranged, and the light guide plate has A light incident surface, the LED light source is opposite to the light incident surface, and a strip-shaped first groove is formed on a side of the light guide plate near the reflection sheet, and the cross section of the first groove is V-shaped. The extending direction of the first groove is perpendicular to the light emitting direction of the LED light source, and a strip-shaped second groove is provided on a side of the light guide plate near the prism film, and a cross-section of the second groove is It is V-shaped, and the extending direction of the second groove is parallel to the light emitting direction of the LED light source.