WO2020062578A1

WO2020062578A1 - Polarizer structure and display device

Info

Publication number: WO2020062578A1
Application number: PCT/CN2018/119513
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: 2018-12-06
Publication date: 2020-04-02
Also published as: CN109143448A

Abstract

A polarizer structure and a display device. The polarizer structure comprises: an optical compensation film (10) having a low refractive index and provided with a plurality of recesses (120); a supporting protective film (20) having a high refractive index and provided with a plurality of protrusions (220) matching the recesses (120).

Description

Polarizing structure and display device

Cross-reference to related applications

This application claims the priority of a Chinese patent application filed on September 30, 2018 with the Chinese Patent Office, application number 201811163416.X, and application name "Polarized Structure, Display Panel and Display Device", the entire contents of which are incorporated herein by reference. In this application.

Technical field

The present application relates to the field of display technology, 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 because of 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 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. At present, in a VA (Vertical Alignment) liquid crystal display, a sub-pixel in a filter is again divided into a plurality of sub-pixels to improve the image quality of a side viewing angle, thereby expanding the viewing angle. However, this method requires more TFT (Thin Film Transistor) elements to drive the sub-pixels. This will inevitably increase the metal traces inside the panel, causing the light-transmissive area to become smaller, affecting the light transmittance of the panel and affecting Picture quality. In order to ensure the brightness, it is necessary to improve the performance of the backlight module so that it can generate incident light with higher brightness, which will increase the cost of the backlight.

Application content

According to various embodiments of the present application, a polarizing structure capable of improving a display angle of a display device with a small display angle and poor side-view image quality without increasing costs is provided.

In addition, a display device is provided.

A polarizing structure includes:

The optical compensation film has a light incident surface and a light emitting surface. The light emitting surface is provided with a plurality of grooves having a predetermined shape, and an angle between a side surface of the groove and the light incident surface is an acute angle.

A support protective film formed on the light emitting surface; wherein a first refractive index of the support protective film is greater than a second refractive index of the optical compensation film; the support protective film and the light emitting A plurality of protruding structures matched with the shape and size of the groove are provided on the surface-contacting side; and

A polarizing film is formed on the support and protection film.

A polarizing structure includes:

The optical compensation film has a light incident surface and a light emitting surface. The light emitting surface is provided with a plurality of grooves having a triangular pyramid shape, and an angle between a side surface of the triangular pyramid groove and the light incident surface is Acute angle; the optical compensation film is a negative single light compensation film, the negative single optical axis compensation film includes a dish-shaped liquid crystal molecule, and an optical axis of the dish-shaped liquid crystal molecule is perpendicular to the light incident surface;

A support protective film formed on the light emitting surface; wherein a first refractive index of the support protective film is greater than a second refractive index of the optical compensation film; the support protective film and the light emitting A plurality of triangular pyramid-shaped convex structures matched with the shape and size of the triangular pyramid-shaped groove are provided on a surface in contact with the surface; and

A polarizing film is formed on the support and protection film.

A display device includes:

Backlight module for providing a light source; and

A display panel placed on one side of the backlight module for displaying a picture;

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

A support protective film formed on the light emitting surface; wherein a first refractive index of the support protective film is greater than a second refractive index of the optical compensation film; the support protective film is in contact with the A plurality of convex structures matched with the shape and size of the groove are provided on a side in contact with the light emitting surface; and

A polarizing film is formed on the support and protection film.

Because the above-mentioned polarizing structure and display device are provided with an optical compensation film and a support protective film, and the first refractive index is greater than the second refractive index, that is, light enters the optical compensation film from the light incident surface of the optical compensation film and penetrates the optical compensation. When the film enters the supporting protective film, it enters the light dense from the photophosphine, so the phenomenon of refraction occurs at the contact interface between the two films, which deflects the light. In this solution, a convex structure is formed on the side of the support protective film that is in contact with the light emitting surface. The side of the convex structure forms an acute angle with the light incident surface. After the incident light enters the support protective film, it is on the surface of the convex structure. The formed angle of incidence is less than 90 °, so a refraction phenomenon occurs, which deflects the light incident vertically, thereby distributing the energy of the positive viewing angle to the side viewing angle and improving the image quality of the side viewing angle. In addition, because the entire polarizing structure does not use additional metal traces, there is no problem that affects the transmittance of light and further affects the image quality.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments or exemplary technologies of the present application, the drawings used in the embodiments or exemplary technical descriptions will be briefly introduced below. Obviously, the drawings in the following description are merely These are some embodiments of the present application. For those of ordinary skill in the art, without any creative effort, drawings of other embodiments can be obtained according to these drawings.

FIG. 1 is a schematic diagram of a polarizing structure according to an embodiment; FIG.

FIG. 2 is a schematic structural diagram of the supporting protective film in FIG. 1; FIG.

3 is a perspective view of a supporting protective film in an embodiment;

4 is a perspective view of a supporting protective film in another embodiment;

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

FIG. 6 is a schematic diagram of a composition of the display panel in FIG. 5; FIG.

FIG. 7 is a schematic diagram of a composition of a polarizing structure in another 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. The drawings show alternative embodiments of the present application. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and comprehensive understanding of the disclosure of this application.

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 invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to limit the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

Please refer to FIG. 1, which is a schematic diagram of a polarizing structure according to an embodiment; and refer to FIG. 2 for assistance. The present application provides a polarizing structure including: an optical compensation film 10, a support and protection film 20, and a polarizing film 30. The optical compensation film 10 has a light incident surface and a light emitting surface. The light incident surface is a side that receives incident light. Light enters the optical compensation film 10 from the light incident surface and exits from the light emitting surface. A plurality of presets are provided on the light emitting surface. In the shape of the groove 120, the angle between the side surface of the groove 120 and the light incident surface is α, and α is an acute angle, which satisfies 0 ° <α <90 °. The angle between the side of the groove 120 and the light incident surface is set to an acute angle, so that when light enters the optical compensation film 10 from the light incident surface and exits from the light emitting surface, it will be refracted by the groove 120 opened on the light emitting surface. phenomenon. The supporting protective film 20 is formed on the light-emitting surface of the optical compensation film 10; the side of the supporting protective film 20 that is in contact with the light-emitting surface is provided with a plurality of protruding structures 220 that match the shape and size of the groove 120. That is, the optical compensation film 10 and the support and protection film 20 can be completely bonded by the convex structure 220 and the groove 120. The support protective film 20 has a first refractive index n1, the optical compensation film 10 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 10 and enters the support protective film 20, it enters the light dense from the photophosphine, and therefore refracts at the contact interface between the optical compensation film 10 and the support protective film 20. In the display device, since most of the light is incident perpendicularly to the polarizing plate, that is, most of the light is perpendicular to the light incident surface, in this solution, an optical compensation film 10 and a supporting protective film 20 with different refractive indexes are provided, and A convex structure 220 is provided on the side of the protective film 20 that is in contact with the light-emitting surface. When the incident light is incident from the optical compensation film 10 to the supporting protective film 20, the surface characteristics of the convex structure 220 are combined with the surface characteristics of the convex structure 220. Refraction changes the propagation path of vertically incident light and 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. The polarizing film 30 is formed on the support protective film 20.

In the above embodiment, by providing a plurality of convex structures 220 in the support protective film 20 and at the same time, according to the refractive effect caused by the refractive index different from that of the optical compensation film 10, the incident light perpendicular to the support protective film 20 can be refracted. Thus, the light energy of the positive viewing angle is distributed to the side viewing angle, thereby solving the problem of color misregistration. In addition, because the entire polarizing structure does not use additional metal traces, there is no problem that affects the transmittance of light and further affects the image quality.

In one embodiment, please continue to refer to FIG. 1, a plurality of protruding structures 220 are provided on a surface of the support protection film 20 in contact with the optical compensation film 10. The plurality of convex structures 220 are triangular prism strip structures, and the multiple triangular prism strip structures are parallel to each other. One side surface of the triangular prism strip structure is in contact with the side where the support protective film 20 and the optical compensation film 10 are in contact, and the contact surface of the support protective film 20 is also the light incident surface. A certain included angle is formed between the other two side surfaces and the light incident surface supporting the protective film 20, that is, α in FIG. 1. Since the angle formed between the side surface of the groove 120 of the optical compensation film 10 and the light incident surface is an acute angle, β is an acute angle. Accordingly, the angle α formed between the side of the convex structure 220 and the light incident surface is also It is an acute angle, and at the same time, the shape and size of the convex structure 220 and the groove 120 are matched, so α = β here. Optionally, the first selectable range of β may be 0 ° <β <90 °, and the second selectable range may be 15 ° <β <75 °. The first selectable range of α may be 0 ° <α <90 °, and the second selectable range may be 15 ° <α <75 °. Setting a certain angle between the side of the raised structure 220 and the light incident surface can make it easier for the refraction effect to occur when the incident light passes through the side, so that the light energy of the positive viewing angle is more diffused to the side viewing angle, and the side is improved. Viewing quality. As shown in FIG. 4, the plurality of protruding structures 220 may be distributed in a two-dimensional matrix array on the light incident surface of the supporting protective film 20; and the protruding structures 220 are triangular pyramidal protrusions. It can be understood that when the protruding structures 220 are When it is a triangular pyramid protrusion, it may have the same cross section as the triangular prism strip structure. The bottom surface of the triangular pyramid is in contact with the light incident surface of the support protective film 20, and a certain angle is formed between the other side surfaces and the light incident surface of the support protective film 20. Because it has the same cross-section as the triangular prism strip structure, the included angle here is also α in FIG. 1. Since the angle formed between the side surface of the groove 120 of the optical compensation film 10 and the light incident surface is an acute angle, β is an acute angle. Accordingly, the angle α formed between the side of the convex structure 220 and the light incident surface is also It is an acute angle, and at the same time, the shape and size of the convex structure 220 and the groove 120 are matched, so α = β here. When the convex structures 220 are triangular prism-shaped convex structures and are arranged side by side, only one-dimensional direction of refraction occurs, so that light is scattered to both sides of the inclined surface of the triangular prism; when the convex structures 220 are triangular pyramids and multiple When a triangular pyramid is in a two-dimensional matrix array, it will be refracted in a two-dimensional plane, making the light diverge to various angles of the two-dimensional plane, so that each angle of view can present better image quality.

Please continue to refer to FIG. 1 and FIG. 2. When the light R0 penetrates the optical compensation film 10 vertically and enters the supporting protective film 20, the incident angle of the vertically incident light at the surface of the convex structure 220 is γ, 0 <γ <90 °, Therefore, the light will be refracted with a refraction angle of θ. Since the light enters the supporting protective film 20 (light dense) with the first refractive index from the optical compensation film 10 (optically dense) having the second refractive index, γ is larger than θ, that is, the light propagation path changes, and the light R1 deviates from the original normal incident 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, the larger the refraction angle when refraction occurs, 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 <n1 <2.5. In one embodiment, if m = n1-n2, the preferred value range of m is 0.01 <m <2.

As shown in FIG. 2, reference is also made to FIG. 3. The optical compensation film 10 includes a light incident surface and a light emitting surface. The light emitting surface and the light incident surface may be rectangular with the same shape and size, or may have other shapes. When the protruding structure 220 is a triangular prism strip structure (V-shaped strip protruding structure), the distance between adjacent triangular prism protrusions in the first direction is greater than or equal to the triangular prism protrusions in the first direction. length. Here, the extension direction of the light-emitting surface that is perpendicular to the triangular prism-shaped convex structure is the first direction, and can also be understood as the extension direction along the X axis. The triangular prism may be a regular triangular prism, or it may not be a regular triangular prism; the sizes of the multiple triangular prisms may be the same or different. The plurality of triangular prism protruding structures 220 are parallel to each other on the light emitting surface. As shown in FIG. 2, Px is the distance between adjacent triangular prism strip structures, Lx is the length of the triangular prism strip structures in the first direction, and Px and Lx satisfy: Px ≧ Lx.

Similarly, when the convex structure 220 is a triangular pyramid convex structure, since it can have the same cross-section as a triangular prism convex, here, referring to FIG. 2 and FIG. 4 at the same time, adjacent triangular pyramid convexes The distance of the structures 220 in the first direction is greater than or equal to the length of the triangular pyramidal protrusion structure 220 in the first direction; the distance of the adjacent triangular pyramidal protrusion structures 220 in the second direction is greater than or equal to the triangular pyramidal protrusion structure The length of 220 in the second direction, where the light-emitting surface is rectangular, the surface of the supporting protective film 20 that is in contact with the light-emitting surface may also be rectangular, and the extending direction of the rectangular width is the first direction, which can also be understood as being along the X axis The extending direction of the rectangular length is the second direction, which can be understood as the extending direction along the Y axis. The triangular prism may be a regular triangular pyramid, or may not be a regular triangular pyramid. The sizes of the multiple triangular pyramids may be the same or different. It can be understood that the shape, size, and size of the groove can be changed without departing from the core principle of the application to meet the actual needs of those skilled in the art. As shown in FIG. 4, Px is the distance in the first direction of adjacent triangular pyramidal protrusion structures 220; Py is the distance in the second direction of adjacent triangular pyramidal protrusion structures 220; Lx is triangular pyramidal protrusions The length of the structure 220 in the first direction; Ly is the length of the triangular pyramidal protrusion structure 220 in the second direction. Px, Py, Lx, and Ly satisfy: Px≥Lx; Py≥Ly. When Px> Lx, Py> Ly, there are gaps between adjacent convex structures 220, that is, the convex structures 220 are distributed in a two-dimensional matrix array. When light travels from photophosphine to light dense, space and protrusion can be used. Disperse the vertically incident light toward the side, further distribute the energy of the frontal light to the side viewing angle, and improve the image quality of the side viewing angle.

Optionally, when the convex structure is a V-shaped strip, a plurality of V-shaped strip-shaped convex structures may also be distributed in a two-dimensional matrix array, and the arrangement in two dimensions may refer to the front triangular pyramid convex structure. The description is not repeated here. Due to the space between adjacent convex structures, the convex junctions are distributed in a two-dimensional matrix array. When light propagates from optically dense to light dense, vertical incident light can be diffused toward the side by means of the interval and convexity. The front-view light energy is further allocated to the side viewing angle to improve the image quality of the side viewing angle.

The optical compensation film 10 may be a single optical axis negative compensation film made of a light-transmitting transparent or translucent material and having a phase compensation function. In one embodiment, the optical compensation film is filled with liquid crystal, and the liquid crystal is birefringent. Material, when the light enters the liquid crystal, it will be refracted into 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 the abnormal refractive index is the direction of the optical electric field and the liquid crystal. The direction of the parallel optical axis, the normal refractive index direction is the direction in which the optical electric field is perpendicular to the liquid crystal optical axis, and the abnormal refractive index direction is perpendicular to the normal refractive index direction. In this embodiment, the optical compensation film 10 may be a negative uniaxial C-compensation film, and the normal refractive index of the negative uniaxial C-compensation film is parallel to all directions of the light emitting surface. The negative uniaxial C-compensation film can be filled with dish-shaped liquid crystal molecules. The dish-shaped liquid crystal molecules are dish-shaped liquid crystals. The optical axis of the dish-shaped liquid crystal is perpendicular to the light incident surface. The abnormal refractive index nce direction of the dish-shaped liquid crystal is similar to that of the dish. The optical axis of the liquid crystal is parallel, and the normal refractive index nco direction of the dish-shaped liquid crystal is perpendicular to the abnormal refractive index nce direction, that is, the normal refractive index nco direction of the dish-shaped liquid crystal is parallel to the light incident surface, and nco> nce; the same is true for the support protective film 20 Has an abnormal refractive index and a normal refractive index; the normal refractive index of the supporting protective film 20 is n. In this embodiment, the first refractive index is the normal refractive index n of the supporting protective film 20, and the second refractive index is a C-compensating film. The normal refractive index nco, the direction of n and the direction of nco are both parallel to the light incident surface.

Optionally, the refractive index of the optical compensation film 10 may be 1.0-2.5, and the refractive index here is also a normal refractive index, that is, nco (ordinary refractive index). The normal refractive index of the support protective film 20 is larger than the normal refractive index of the optical compensation film 10. In other words, the optical compensation film 10 is an optically sparse medium relative to the supporting protective film 20, and the supporting protective film 20 is an optically dense medium relative to the optical compensation film 10. Specifically, the normal refractive index difference between the support protective film 20 and the optical compensation film 10 ranges from 0.01 to 2. Theoretically, the larger the difference between the normal refractive index of the supporting protective film 20 and the normal refractive index of the optical compensation film 10 is, the easier it is to convert the light energy of the positive viewing angle when the incident light is incident perpendicularly on the supporting protective film 20 and the refractive effect occurs. Assigned to side view.

The polarizing film 30 has an absorption axis and a transmission axis, and polarized light having a polarization direction parallel to the transmission axis can pass through the polarizing film 30. In an embodiment, in order to reduce the polarization effect of the phase compensation film on light, the optical axis (optical axis of the liquid crystal) of the negative uniaxial C-compensation film may be parallel to the transmission axis of the polarizing film 30, and the incident light passes through the phase The polarization direction after the compensation film is parallel to the transmission axis of the polarizing film 30, so it can completely pass through the polarizing film. In this solution, since the negative uniaxial C-compensating film also has a phase compensation function, using a negative uniaxial C-compensating film can not only deflect incident light at the interface to expand the viewing angle, but also enhance the quality of the side viewing angle. , Can also play a role in phase compensation.

In the exemplary technology, polyvinyl alcohol is generally used as the polarizing film 30, and polyvinyl alcohol has extremely strong hydrophilicity. In order to protect the physical properties of the polarizing film 30, it mainly absorbs and penetrates polarized light. This application The middle polarizing film 30 is selected from products currently used in the market. The penetration axis is parallel to the 0/180 degree direction, and the absorption axis is parallel to the 90/270 degree direction. Usually a layer of triacetate cellulose support film is required on both sides of the polarizer. The triacetate cellulose support film has high light transmittance, good water resistance and certain mechanical strength, and can protect the polarizer. In this embodiment, since the optical compensation film 10 and the support protective film 20 are provided on one side of the polarizer, the optical compensation film 10 and the support protective film 20 can perform phase compensation and deflect light, and can also serve as a protective layer. In order to protect the polarizing film 30, the triacetate supporting film on the light incident side of the polarizer can be omitted in the polarizing plate, which is beneficial to the thin design of the product. It should be noted that the optical compensation film 10 and the support and protection film 20 need to have a proper thickness to achieve the protection effect on the polarizing film 30.

The material supporting the protective film 20 may include, but is not limited to, any one of a polyethylene terephthalate film, a cellulose triacetate film, or a polymethyl methacrylate film. PET (Polyethylene terephthalate, polyethylene terephthalate film) has good optical properties and weather resistance, and amorphous PET plastic has good optical transparency. In addition, PET plastic has excellent abrasion resistance, dimensional stability, and electrical insulation. TAC (Triacetyl Cellulose) is mainly used to protect LCD polarizers. PMMA (Polymethyl Methacrylate) has good chemical stability and weather resistance. In the present application, the supporting protective film 20 can also play a supporting and protecting role. Exemplarily, the thickness of the supporting protective film 20 may be 20 μm to 200 μm.

In summary, combining FIG. 1 and FIG. 2 at the same time, the optical compensation film 10 is a negative single optical axis C-compensation film, and the groove of the optical compensation film 10 is a V-shaped strip groove, which supports the convex structure of the protective film 20 A V-shaped strip-shaped convex structure (triangular prism) is used as an example to briefly describe the principle of improving the viewing angle of this application: the incident light entering the negative single optical axis C-compensation film can be divided into horizontally polarized and vertically polarized light. The polarization axis of the polarizing film 30 used is parallel to the 0/180 degree direction, so only the medium interface through which the light of the horizontal polarization component passes will be focused here. The equivalent refractive index of the light of the horizontal polarization component on the negative single optical axis C-compensation film is nco (ordinary refractive index, normal refractive index). The light of the horizontal polarization component passes through the negative single optical axis C-compensation film. The support protective film 20 that supports and protects the polarizing film 30 (the refractive index of the support protective film that corresponds to the function of supporting and protecting the polarizing film 30 is n), so the horizontally polarized light is on the two media contact surfaces (that is, V in FIG. 2 The stripe-like protrusions) occur from the optically sparse medium to the light-dense medium (n> nco). In conjunction with the acute angle formed between the convex structure 220 supporting the protective film 20 and the light incident surface, a refraction effect is formed to form a positive viewing angle light -Type optical distribution with large viewing angles. Thus, the light energy of the positive viewing angle is allocated to the side viewing angle, and the problem of color cast is improved.

The present application also provides a polarizing structure. The polarizing structure may include: an optical compensation film including a light incident surface and a light emitting surface. The light emitting surface is provided with a plurality of grooves having a triangular pyramid shape. The included angle between the light incident surfaces is an acute angle; the optical compensation film is a negative single light compensation film, and the negative single optical axis compensation film contains a dish-shaped liquid crystal molecule, and the optical axis of the dish-shaped liquid crystal molecule is perpendicular to the light incident surface ; A support protective film, the support protective film is formed on the light-emitting surface of the optical compensation film; wherein the first refractive index of the support protective film is greater than the second refractive index of the optical compensation film; A triangular pyramid-shaped convex structure that matches the shape and size of the triangular pyramid-shaped groove; a polarizing film is formed on the support and protection film.

In the foregoing embodiment, by providing a plurality of triangular pyramid-shaped convex structures in the supporting protective film, and at the same time, the incident light perpendicular to the supporting protective film can be refracted according to the refractive effect caused by the refractive index different from the optical compensation film. Thus, the light energy of the positive viewing angle is distributed to the side viewing angle, thereby solving the problem of color misregistration. In addition, because the entire polarizing structure does not use additional metal traces, there is no problem that affects the transmittance of light and further affects the image quality.

Please refer to FIG. 5, which is a schematic diagram of a display device according to an embodiment. The present application also discloses a display device including a backlight module 5 and a display panel 1 disposed above the backlight module 5. The backlight module 5 is used to provide incident light R0, which is incident on the display panel 1 in a concentrated manner. The divergent direction of the incident light R0 is at a small angle with the direction perpendicular to the display panel 1. The small angle may be less than 30 °. The display panel Most of the light received is normal incident light. Since the display panel 1 has an optical compensation film 10 and a support protective film 20, and a light incident surface of the support protective film 20 is provided with a plurality of convex structures 220 having a predetermined shape. The vertical incident light can be deflected to generate the outgoing light R1 on the surface of the convex structure 220 by refraction, thereby allocating the positive viewing angle energy to the side viewing angle and improving the image quality of the side viewing angle. The backlight module 5 may include a side-type LED light source 51, a reflection sheet 52, and a light guide plate 53. The upper and lower surfaces of the light guide plate 53 are provided with long V-shaped grooves. The side walls of the V-shaped grooves on the lower surface of the light guide plate 53 are parallel to the side-type light source 51, and the V-shaped grooves on the upper surface of the light guide plate 53 and the V-shaped grooves on the lower surface. Set up perpendicular to each other.

Please refer to FIG. 6, which is a schematic diagram of the composition of the display panel 1 in FIG. 5. The display panel 1 may be, for example, a TFT-LCD (Thin Film Transistor Liquid Crystal Displayer) display panel 1, an OLED (Organic Light-Emitting Diode) display panel 1, or a QLED (Quantum Dot Light Emitting Diodes). , Quantum dot light emitting diode) display panel 1, curved display panel 1 or other display panel 1. The display panel 1 of the present application is described using the TFT-LCD display panel 1 as an example. As shown in FIG. 6, the display panel 1 includes an upper polarizing plate 1000, a lower polarizing plate 2000, an upper substrate 3000, a lower substrate 4000, and a liquid crystal layer 6000 sandwiched between the upper substrate 3000 and the lower substrate 4000. The incident order in 1 is: first enter the lower polarizing plate 2000, then pass through the lower substrate 4000, then pass through the liquid crystal layer 6000, rotate through the liquid crystal layer 6000, and then enter the upper substrate 3000, and finally enter the upper polarizing plate 1000. The lower polarizing plate 2000 is a polarizing structure described in the foregoing embodiment. It can be understood that the upper polarizing plate 1000 may also be a polarizing structure described in the foregoing embodiment. Here, the following polarizing plate 2000 is used as an example for description. The lower polarizing plate 2000 may include an optical compensation film 10 having a second refractive index. The optical compensation film 10 includes a light entrance surface and a light exit surface, and the light exit surface is provided with a plurality of grooves having a predetermined shape. 120, the included angle between the side surface of the groove 120 and the light incident surface is an acute angle; it may further include a support protection film 20 formed on the light exit surface of the optical compensation film 10; wherein the support protection film 20 has a first A refractive index; a first refractive index of the supporting protective film 20 is greater than a second refractive index of the optical compensation film 10; a side of the supporting protective film 20 in contact with the light emitting surface is provided with a plurality of protrusions matching the shape and size of the groove 120 Structure 220. The lower polarizing plate 2000 may further include a polarizing film 30 formed on the supporting and protecting film 20. The lower polarizing plate 2000 further includes a second compensation film 40 formed on the polarizing film 30. The light is incident from the lower polarizing plate 2000 to the optical compensation film 10 in the lower polarizing plate 2000 and penetrates the optical compensation film 10 into the support protective film 20. The optical compensation film 10 can phase compensate the incident light. Because light enters light dense from photophosgene, and the incident angle of incident light on at least part of the contact surface is not equal to 90 °, a refraction phenomenon occurs, which deflects normal incident light to a side viewing angle and distributes positive viewing angle energy to the side viewing angle. To improve the quality of the side view. The specific structure of the polarizing structure has been described in detail above, and is not repeated here.

Please refer to FIG. 7. In an embodiment, the polarizing structure may further include a pressure-sensitive adhesive layer 50, the second compensation film 40 is disposed on the polarizing film 30, the pressure-sensitive adhesive 50 is disposed on the second compensation film, and the pressure-sensitive adhesive layer 50 is mainly used for bonding polarizing structures to other components. The second compensation film 40 may be an optical film having a phase compensation function.

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 a limitation on the scope of patent application. 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:

The optical compensation film has a light incident surface and a light emitting surface. The light emitting surface is provided with a plurality of grooves having a predetermined shape, and an angle between a side surface of the groove and the light incident surface is an acute angle.

A support protective film formed on the light emitting surface; wherein a first refractive index of the support protective film is greater than a second refractive index of the optical compensation film; the support protective film is in contact with the A plurality of convex structures matched with the shape and size of the groove are provided on a side in contact with the light emitting surface; and

A polarizing film is formed on the support and protection film.
The polarizing structure according to claim 1, wherein the optical compensation film is a single optical axis negative compensation film, and the second refractive index is a normal refractive index of the single optical axis negative compensation film, and the single The optical axis negative compensation film includes a dish-shaped liquid crystal molecule, and an optical axis of the dish-shaped liquid crystal molecule is perpendicular to the light incident surface.
The polarizing structure according to claim 2, wherein the polarizing film has a transmission axis, light having a polarization direction parallel to the transmission axis can pass through the polarizing film, and light of the negative uniaxial compensation film The axis is perpendicular to the penetration axis.
The polarizing structure according to claim 1, wherein the polarizing film includes a polyvinyl alcohol film.
The polarizing structure according to claim 1, wherein the value of the first refractive index ranges from 1.0 to 2.5.
The polarizing structure according to claim 1, wherein the value of the second refractive index ranges from 1.0 to 2.5.
The polarizing structure according to claim 1, wherein the support protective film comprises a polyethylene terephthalate film.
The polarizing structure according to claim 1, wherein the support protective film comprises a cellulose triacetate film.
The polarizing structure according to claim 1, wherein the support protective film comprises a polymethyl methacrylate film.
The polarizing structure according to claim 1, wherein a thickness of the support and protection film is 20 μm to 200 μm.
The polarizing structure according to claim 1, wherein the polarizing structure further comprises a second compensation film disposed on the polarizing film and configured to perform phase compensation on the polarizing film.
The polarizing structure according to claim 11, wherein the polarizing structure further comprises a pressure-sensitive adhesive layer disposed on the second compensation film.
The polarizing structure according to claim 1, wherein the convex structure is a V-shaped strip-shaped convex structure, and a plurality of the V-shaped strip-shaped convex structures are parallel to each other.
The polarizing structure according to claim 1, wherein the convex structure is a triangular pyramid convex structure, and a plurality of the triangular pyramid convex structures are distributed in a two-dimensional matrix array on the light emitting surface.
The polarizing structure according to claim 13, wherein a distance in a first direction between adjacent convex structures is greater than or equal to a length of the convex structures in the first direction; The direction perpendicular to the extending direction of the V-shaped strip-shaped convex structure on the light emitting surface is the first direction.
The polarizing structure according to claim 14, wherein a surface of the support and protection film that is in contact with the light emitting surface is rectangular, and a distance in the first direction between the adjacent triangular pyramidal protrusion structures is greater than or equal to the distance A length of the triangular pyramidal protrusion structure in the first direction;

The distance of the adjacent triangular pyramidal protrusion structures in the second direction is greater than or equal to the length of the triangular pyramidal protrusion structures in the second direction; wherein the extending direction of the rectangular width is the first The second direction is the direction in which the rectangular length extends.
A polarizing structure includes:

The optical compensation film has a light incident surface and a light emitting surface. The light emitting surface is provided with a plurality of grooves having a triangular pyramid shape, and an angle between a side surface of the triangular pyramid groove and the light incident surface is Acute angle; the optical compensation film is a negative single light compensation film, the negative single optical axis compensation film includes a dish-shaped liquid crystal molecule, and an optical axis of the dish-shaped liquid crystal molecule is perpendicular to the light incident surface;

A support protective film formed on the light emitting surface; wherein a first refractive index of the support protective film is greater than a second refractive index of the optical compensation film; the support protective film and the light emitting A plurality of triangular pyramid-shaped convex structures matched with the shape and size of the triangular pyramid-shaped groove are provided on a surface in contact with the surface; and

A polarizing film is formed on the support and protection 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:

The optical compensation film has a light incident surface and a light emitting surface. The light emitting surface is provided with a plurality of grooves having a predetermined shape, and an angle between a side surface of the groove and the light incident surface is an acute angle.

A support protective film formed on the light emitting surface; wherein a first refractive index of the support protective film is greater than a second refractive index of the optical compensation film; the support protective film is in contact with the A plurality of convex structures matched with the shape and size of the groove are provided on a side in contact with the light emitting surface; and

A polarizing film is formed on the support and protection film.
The display device according to claim 18, wherein the display panel is a liquid crystal display panel.
The display device according to claim 18, wherein the display panel is an organic electroluminescence display panel.