WO2020062603A1 - Polarizing structure and display device - Google Patents

Abstract

Provided are a polarizing structure (100) and a display device (10). The polarizing structure (100) comprises an optical film layer (140), wherein the optical film layer (140) comprises a film layer body (141) and a plurality of prism portions (143); the plurality of prism portions (143) are arranged at intervals on one side of the film layer (141) body; the prism portion (143) has a shape selected from one of a triangular prism and a triangular pyramid; when the prism portion (143) is in the shape of a triangular prism, one side face of the prism portion (143) is attached to the film layer body (141); and when the prism portion (143) is in the shape of a triangular pyramid, a bottom face of the prism portion (143) is attached to the film layer body (141).

Description

Polarizing structure 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 2018111620839 and an invention name of "Polarized Structure and Display Device", the entire contents of which are incorporated herein by reference.

Technical field

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

Background technique

Most of the current large-size liquid crystal display panels use negative VA (Vertical Alignment) liquid crystals. VA-type liquid crystal technology has the characteristics of higher production efficiency and low manufacturing cost. The VA-type liquid crystal technology has obvious problems of viewing role deviation, which is especially obvious when a larger viewing angle is required.

The VA liquid crystal driver saturates the brightness at a large viewing angle with the voltage, which causes the visual role to be worse than the front view. Generally, the way VA liquid crystal technology solves the problem of viewing role deviation is to subdivide each RGB sub-pixel into a main pixel and a sub-pixel, and apply different driving voltages to the main pixel and the sub-pixel, so that the overall large viewing angle brightness changes with voltage Close to front view, where R sub-pixels are Red sub-pixels, red sub-pixels; G sub-pixels are Green sub-pixels, green sub-pixels; B sub-pixels are Blue sub-pixels, blue sub-pixels. In this way, it is often necessary to redesign metal traces or switching elements to drive the sub-pixels, causing sacrifices to the light-transmissive opening area, affecting the transmittance of the display panel, and directly increasing the cost of the backlight.

Summary of the Invention

Based on this, it is necessary to provide a polarizing structure, and by setting the polarizing structure, it is possible to improve the viewing role polarization without dividing the main pixel and the sub pixel in the display panel.

In addition, a display device is provided.

A polarizing structure includes:

A polarizing layer having opposite light incident surfaces and light emitting surfaces;

A compensation film layer disposed on the light emitting surface;

A protective layer disposed on the light incident surface; and

An optical film layer includes a film body and a prism portion. The film layer body is disposed on a side of the protective layer away from the light incident surface. There are a plurality of prism portions, and a plurality of the prism portions are arranged at intervals. On the side of the film layer body far from the protective layer; wherein the shape of each of the prism portions is selected from one of a triangular prism shape and a triangular pyramid shape; and the shape of each of the prism portions is three In the case of a prism, one side of each of the prism portions is bonded to the film body; when the shape of each of the prism portions is a triangular pyramid, the bottom surface of each of the prism portions and the film layer body fit.

A polarizing structure includes:

A polarizing layer having opposite light incident surfaces and light emitting surfaces, and the polarizing layer is a polyvinyl alcohol layer;

A compensation film layer is disposed on the light emitting surface, and the material of the compensation film layer is a material having birefringence performance;

A protective layer disposed on the light incident surface, the protective layer being selected from one of a polyethylene terephthalate layer, a cellulose triacetate layer, and a polymethyl methacrylate layer; and

An optical film layer includes a film body and a prism portion. The film layer body is disposed on a side of the protective layer away from the light incident surface. There are a plurality of prism portions, and a plurality of the prism portions are arranged at intervals. The refractive index of the optical film layer on the side of the film layer body far from the protective layer is 1.0 to 2.5;

Wherein, the shape of each of the prism portions is selected from one of a triangular prism shape and a triangular pyramid shape; when the shape of each of the prism portions is a triangular prism shape, one side surface of each of the prism portions and the prism portion The film body is bonded, the first direction is perpendicular to the direction of the light incident surface, the second direction is perpendicular to the first direction, the prism portion extends along the second direction, and the third direction is perpendicular to the second direction The direction and the first direction are both perpendicular, and the arrangement manner of the plurality of prism portions is selected from one of an arrangement along the third direction and a matrix arrangement; when the shape of each of the prism portions is a triangular pyramid shape A bottom surface of each of the prism portions is bonded to the film body, and a plurality of the prism portions are arranged in a matrix.

A display device includes a polarizing structure, and the polarizing structure includes:

A polarizing layer having opposite light incident surfaces and light emitting surfaces;

A compensation film layer disposed on the light emitting surface;

A protective layer disposed on the light incident surface; and

An optical film layer includes a film body and a prism portion. The film layer body is disposed on a side of the protective layer away from the light incident surface. There are a plurality of prism portions, and a plurality of the prism portions are arranged at intervals. On the side of the film layer body far from the protective layer; wherein the shape of each of the prism portions is selected from one of a triangular prism shape and a triangular pyramid shape; and the shape of each of the prism portions is three In the case of a prism, one side of each of the prism portions is bonded to the film body; when the shape of each of the prism portions is a triangular pyramid, the bottom surface of each of the prism portions and the film layer body fit.

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

BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

3 is a schematic structural diagram of an optical film layer of the polarized structure shown in FIG. 2;

4 is a schematic structural diagram of the optical film layer shown in FIG. 3 in a plane where the X axis and the Z axis are located;

FIG. 5 is a schematic structural diagram of a light traveling direction in the optical film layer shown in FIG. 4; FIG.

6 is a schematic structural diagram of a polarizing module of the display device shown in FIG. 1;

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

8 is a schematic structural diagram of the backlight module shown in FIG. 7 on a plane where the Z axis and the Y axis are located;

9 is a schematic structural diagram of an optical film layer of a polarizing structure according to another embodiment;

10 is a schematic structural diagram of the optical film layer shown in FIG. 9 on a plane where the Z axis and the X axis are located;

11 is a schematic structural diagram of the optical film layer shown in FIG. 9 on a plane where the Z axis and the Y axis are located;

FIG. 12 is a comparison chart of the brightness of the VA type liquid crystal driver at different viewing angles as a function of voltage; FIG. 12 a) is a comparison chart of the brightness of the VA type liquid crystal driver at the side and positive viewing angles of the undivided main pixel and sub pixel as a function of voltage Figure 12b) is a comparison chart of the changes in brightness of the side viewing angle and the positive viewing angle after voltage division of the VA liquid crystal driver after the main pixel and the sub pixel are divided.

detailed description

In order to facilitate understanding of the present invention, the present invention will be described more fully with reference to the accompanying drawings. The drawings show a preferred embodiment of the invention. However, the present invention 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 understanding of the present disclosure.

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 herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention.

As shown in FIG. 1, a display device 10 according to an embodiment. The display device 10 may be selected from an LCD display device (Liquid Crystal Display), an OLED (Organic Light-Emitting Diode) display device, and a QLED (Quantum Dot Light Emitting Diode) display device. Meanwhile, the display device 10 may be selected from one of a flat display device and a curved display device. It can be understood that the types of the display device 10 include, but are not limited to, the above examples. When the display device 10 is an LCD display device, it may be selected from one of VA (Vertical Alignment), TN (Twisted Nematic), and IPS (In-Plane Switching). In the illustrated embodiment, the display device 10 includes a polarizing structure 100, a display panel 200, a polarizing module 300, and a backlight module 400.

The polarizing structure 100 can improve the viewing role of the display device 10. Referring to FIGS. 1 and 2, the polarizing structure 100 includes a polarizing layer 110, a compensation film layer 120, a protective layer 130, and an optical film layer 140.

The polarizing layer 110 has a light incident surface 111 and a light emitting surface 113 opposite to each other. The first direction is defined as a direction perpendicular to the light incident surface 111. In the illustrated embodiment, the first direction is the direction in which the Z axis is located.

In one embodiment, the polarizing layer 110 is a polyvinyl alcohol layer (ie, a PVA layer) and has polarizing characteristics. It should be noted that the polarizing layer 110 is not limited to the polyvinyl alcohol layer, and other materials having polarizing characteristics can also be used in the polarizing layer 110.

The compensation film layer 120 is disposed on the light emitting surface 113. By providing the compensation film layer 120 on the light emitting surface 113 of the polarizing layer 110, not only the polarizing layer 110 can be protected, but also the polarizing structure 100 can be used to compensate the large-angle-polarized light output of the liquid crystal molecules when the polarizing structure 100 is disposed on the display panel 200.

In one embodiment, the compensation film layer 120 has birefringence performance. The material of the compensation film layer 120 is selected from one of a liquid crystal film material and a TAC (Triacetyl Cellulose, triacetate film) material.

The protective layer 130 is used to support and protect the polarizing layer 110. The protective layer 130 cooperates with the compensation film layer 120 to prevent the polarizing layer 110 from affecting its polarization performance due to water absorption or fragmentation. The protective layer 130 is disposed on the light incident surface 111. In the illustrated embodiment, the protective layer 130 covers the light incident surface 111.

In one embodiment, the protective layer 130 is selected from one of a polyethylene terephthalate layer, a cellulose triacetate layer, and a polymethyl methacrylate layer. Polyethylene terephthalate (PET) has excellent physical and mechanical properties in a wide temperature range. The long-term use temperature can reach 120 ° C, and its electrical insulation is excellent. Electrical properties are still good, creep resistance, fatigue resistance, friction resistance and dimensional stability are all good. Tri-cellulose Acetate (TCA) has excellent thermoplasticity, good transparency, and excellent mechanical properties. Polymethylmethacrylate (PMMA) has excellent transparency, outstanding aging resistance, strong resistance to chipping, and excellent corrosion resistance. By providing the protective layer 130, the light transmittance of the polarizing structure 100 can also be ensured, and the mechanical strength and aging resistance of the polarizing structure 100 can be enhanced. It should be noted that the protective layer 130 is not limited to one selected from a polyethylene terephthalate layer, a cellulose triacetate layer, and a polymethyl methacrylate layer, and may be composed of other materials.

In one embodiment, the thickness of the protective layer 130 in the first direction is 20 μm to 100 μm.

Referring to FIGS. 3 and 4, the optical film layer 140 includes a film layer body 141 and a prism portion 143.

The film body 141 is disposed on a side of the protective layer 130 away from the light incident surface 111. In the illustrated embodiment, the film body 141 has a first surface 1411 and a second surface 1413 opposite to each other. The first surface 1411 and the surface of the protective layer 130 away from the light incident surface 111 are bonded together.

The thickness of the film body 141 in the first direction is defined as D. In one embodiment, D is 20 μm to 200 μm.

The prism portion 143 is disposed on a side of the film layer body 141 away from the protective layer 130. The prism part 143 has a triangular prism shape. One side surface of the prism portion 143 is adhered to a surface of the film layer body 141 away from the protective layer 130.

Please refer to FIG. 5. The direction indicated by the arrow in FIG. 5 is the direction in which the light travels. By providing a triangular prism-shaped prism portion 143, in the process that light travels from the optically sparse medium (that is, air) to the optically dense medium (that is, the optical film layer 140), the optically dense medium and the optically dense medium are formed to travel with the light The interface where the directions intersect, so that light is refracted or diffused during the traveling process, so that the light energy of the positive viewing angle is distributed to the side viewing angle, so that the side viewing angle can also present the same picture quality as the positive viewing angle and improve the viewing role. Partial.

In the illustrated embodiment, the second surface 1413 is a flat surface. The prism portion 143 has a first side surface 1431, a second side surface 1433, and a third side surface 1435 connected in this order. The third side surface 1435 is attached to the second surface 1413. In one embodiment, the prism portion 143 and the film body 141 are an integrally formed structure.

The prism portion 143 extends in the second direction. Defines that the second direction is perpendicular to the first direction. In the illustrated embodiment, the second direction is the direction in which the Y axis is located.

The angle between the first side 1431 and the third side 1435 is defined as a1. The angle between the second side surface 1433 and the third side surface 1435 is defined as a2. In one embodiment, a1 is 15 ° to 75 °. a2 is 15 ° to 75 °. By setting a1 and a2 to this range, the polarizing structure 100 can cover the general backlight type angle, so that the light traveling direction intersects the first side 1431 and the second side 1433, and the light emitted by the light source passes through the optical A larger degree of deflection can occur after the film layer 140, so as to more effectively improve the problem of visual role deviation. Among them, the backlight light type angle is the light output angle of the backlight light source.

In one embodiment, a1 is 45 °; a2 is 45 °.

In one embodiment, the prism portion 143 has a regular triangular prism shape. By setting the shape of the prism portion 143 to a triangular prism shape, the light traveling direction of a general backlight light source can be set to intersect with the second side surface 1333, so that the light emitted by the light source can pass through the optical film layer 140 to a greater degree. Deflection, which can more effectively improve the problem of depending on the role.

The maximum thickness of the prism portion 143 in the first direction is defined as d. In one embodiment, d is 20 μm to 200 μm.

There are a plurality of prism portions 143. The plurality of prism portions 143 are disposed on the side of the film layer body 141 away from the protective layer 130 at intervals. In one embodiment, the plurality of prism portions 143 are aligned in the third direction. A direction perpendicular to both the second direction and the first direction is defined as a third direction. In the illustrated embodiment, the third direction is the direction in which the X axis is located.

Each prism portion 143 has an edge 1437 opposite to the side. In the illustrated embodiment, the edge 1437 is an intersection of the first side surface 1431 and the second side surface 1433. In one embodiment, the pitch of the edges 1437 of the adjacent prism portions 143 in the third direction is defined as Px1. The maximum width of each prism portion 143 in the third direction is defined as Lx1. In one embodiment, Px1 is greater than or equal to Lx1. By making Px1 greater than or equal to Lx1, it is possible to directly pass the light in a part of the non-prism area, and maintain a certain ratio of the frontal light energy to avoid excessive reduction in brightness, and also control the distribution ratio of large-angle light energy.

It should be noted that the pitches of the edges 1437 of the adjacent prism portions 143 in the third direction may be all equal, or may not be completely equal, or may be completely different. Set according to actual needs. By controlling the distance in the third direction of the edges 1437 of the adjacent prism parts 143 to control the size of different regions of the front-view light energy, the light uniformity is adjusted. It should be noted that the maximum width of each prism portion 143 in the third direction may be equal to each other, or may not be completely equal, or may be completely different. Set according to actual needs. By controlling the maximum width of each prism portion 143 in the third direction to control the size of different regions of the front-view light energy, the light uniformity is adjusted.

In one embodiment, the maximum thickness (ie, the sum of D and d) of the optical film layer 140 in the first direction is 20 μm to 200 μm. This arrangement enables the cooperation of the optical film layer 140 and the protective layer 130 to ensure the weatherability of the polarizing layer 110, prevents the polarizing layer 110 from contacting the external environment, and prevents moisture from entering the polarizing layer 110 and affecting the weathering resistance of the polarizing layer 110. Polarization performance.

In one embodiment, the refractive index of the optical film layer 140 is 1.0 to 2.5. When the difference between the refractive index of the optical film layer 140 and the refractive index of air is larger, the angle of light refraction is larger, and the energy of light in the positive viewing angle is more easily distributed to the side viewing angle, and the larger viewing angle can be seen to be the same as the positive viewing angle. The image quality of the image, thereby improving the viewing role.

In one embodiment, the optical film layer 140 is a transparent light energy distribution film.

In one embodiment, the material of the optical film layer 140 is selected from the group consisting of polyethylene terephthalate (PET), tri-cellulose (Acetate, TCA), and polymethyl methacrylate. (polymethyl methacrylate, PMMA). It should be noted that the material of the optical film layer 140 is not limited to the above-mentioned material, and may be other materials.

In one embodiment, referring to FIG. 6, the polarizing structure 100 further includes an adhesive layer 150. The adhesive layer 150 is disposed on a side of the compensation film layer 120 away from the polarizing layer 110. The adhesive layer 150 is provided so that the polarizing structure 100 can be adhered to the display panel.

In one embodiment, the adhesive layer 150 is a PSA layer. PSA (pressure sensitive adhesive) is a kind of pressure sensitive adhesive. It should be noted that the adhesive layer 150 is not limited to a PSA layer, and may be other types of adhesive layers.

The display panel 200 is located on a side of the polarizing structure 100 near the compensation film layer 120. In the illustrated embodiment, the display panel 200 is adhered to a side of the adhesive layer 150 away from the compensation film layer 120.

In one embodiment, the display panel 200 is selected from a liquid crystal display panel, an OLED display panel (Organic Light-Emitting Diode, organic light-emitting diode display panel), and a QLED display panel (Quantum Dot Light Emitting Diode, quantum dot light-emitting diode display panel). One of them. This arrangement allows the display device 10 to be selected from one of a liquid crystal display device, an OLED display device, and a QLED display device.

In one embodiment, the display panel 200 is a liquid crystal display panel in which a main pixel and a sub-pixel are not divided. It should be noted that the display panel 200 may also be a liquid crystal display panel divided into a main pixel and a sub pixel.

Please continue to refer to FIG. 6. The polarizing module 300 is disposed on a side of the display panel 200 away from the polarizing structure 100. The polarizing module 300 includes an optical compensation layer 310, a polarizer 320, and a protective film 330 that are sequentially stacked.

The optical compensation layer 310 is located on a side of the display panel 200 away from the polarizing structure 100. The polarizer 320 is located on a side of the optical compensation layer 310 away from the display panel 200. The protective film 330 is located on a layer of the polarizing layer 320 away from the optical compensation layer 310. The optical compensation layer 310 can not only support and protect the polarizer 320, but also compensate the large-angle-polarized light output of the liquid crystal molecules. In one embodiment, the optical compensation layer 310 has birefringence performance. Specifically, the optical compensation layer 310 is selected from one of a liquid crystal film material and a TAC material.

In one embodiment, please continue to refer to FIG. 6. The polarizing module 300 further includes an adhesive layer 340. The adhesive layer 340 is disposed between the optical compensation layer 310 and the display panel 200, and the adhesive layer 340 is adhered to the optical compensation layer 310 and the display panel 200 so that the polarizing module 300 and the display panel 200 are adhered. In one embodiment, the adhesive layer 340 is a PSA layer. It should be noted that the adhesive layer 340 is not limited to a PSA layer, and may be other types of adhesive layers.

The material of the polarizer 320 is polyvinyl alcohol. It should be noted that the material of the polarizer 320 is not limited to polyvinyl alcohol, and other materials having polarizing characteristics can also be applied to the polarizer 320.

The protective film 330 is used to protect the polarizer 320 to prevent the polarizer 320 from affecting its polarization performance due to water absorption or fragmentation. In one embodiment, the protective film 330 is selected from one of a PET film, a TAC film, and a PET / TAC film. Among them, PET / TAC film means that a PET film is laminated on a TAC film. It should be noted that when the protective film 330 is a PET / TAC film, a PET film may be laminated on the polarizer 320, or a TAC film may be laminated on the polarizer 320.

In one embodiment, please continue to refer to FIG. 6. The polarizing module 300 further includes a functional film 360. The functional film 360 is laminated on a side of the protective film 330 away from the polarizer 320. The functional film 360 has functions such as anti-dazzle and anti-ultraviolet, so that the display device 10 can also be viewed in sunlight. In one embodiment, the functional film 360 is selected from one of an AG film (Anti-stun film), an LR film (Low reflection film), and an AG / LR film. The AG film / LR film means that the LR film is laminated on the AG film. It should be noted that when the functional film 360 is an AG film / LR film, the AG film may be laminated on the protective film 330, or the LR film may be laminated on the protective film 330.

The backlight module 400 is located on a side of the polarizing structure 100 away from the display panel 200. In the illustrated embodiment, the backlight module 400 and the polarizing structure 100 are spaced apart.

In one embodiment, the backlight module 400 is a collimated backlight module. The collimating backlight module 400 can enable the energy of light to be output at a positive viewing angle, effectively improve the optical utilization rate, and reduce the energy consumption of the display device 10.

Please refer to FIG. 7 and FIG. 8 together. In one embodiment, the backlight module 400 includes a reflective layer 410, a light guide plate 420, and an optical film 430. The reflective layer 410, the light guide plate 420, and the optical film 430 are sequentially stacked in a direction close to the polarizing structure 100, and the optical film 430 is disposed near the polarizing structure 100. Through the cooperation of the optical film 430 and the light guide plate 420, the light emitted from the backlight module 400 can be collimated light with high directivity. In the illustrated embodiment, the backlight module 400 is substantially opposite to the polarizing structure 100. The optical film 430 is opposed to a side of the optical film layer 140 near the prism portion 143.

The light guide plate 420 has a light incident side 421. The light incident side 421 is substantially parallel to the first direction. In one embodiment, please continue to refer to FIG. 8, the backlight module 400 further includes a light source 440. The light source 440 is disposed near the light guide plate 420 and is opposite to the light incident side 421. The light traveling direction of the light source 440 is parallel to the second direction. In the illustrated embodiment, the light source 440 is an LED array light source.

The light guide plate 420 is provided with a first light guide groove 423. The first light guide groove 423 is located on a surface of the light guide plate 420 near the reflective layer 410. In the illustrated embodiment, the first light guide groove 423 is a V-shaped groove. In one embodiment, the first light guide groove 423 is formed on the side of the light guide plate 420 near the reflective layer 410 by a V-cut (V-shaped groove) method. The extending direction of the first light guide groove 423 is parallel to the third direction. In one embodiment, there are multiple first light guide grooves 423. The plurality of first light guide grooves 423 are arranged at intervals along the second direction.

The light guide plate 420 is provided with a second light guide groove 425. The second light guide groove 425 is formed on a surface of the light guide plate 420 near the optical film 430. In the illustrated embodiment, the second light guide groove 425 is a V-shaped groove. In one embodiment, the second light guide groove 425 is formed on the side of the light guide plate 420 near the optical film 430 in a V-cut manner. The extending direction of the second light guide groove 425 is parallel to the second direction. In one embodiment, there are multiple second light guide grooves 425. The plurality of second light guide grooves 425 are arranged at intervals along the third direction.

The optical film 430 is provided with a plurality of grooves 432. The plurality of grooves 432 are formed on the surface of the optical film 430 on a side close to the light guide plate 420 at intervals. The plurality of grooves 432 are V-shaped grooves, so that the surface of the optical film 430 near the light guide plate 420 forms an inverse prism structure.

In one embodiment, the display device 10 is a curved display panel. It should be noted that the display device 10 is not limited to a curved display panel, and may be a flat display panel.

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

(1) The polarizing structure 100 of the display device 10 is provided with a compensation film layer 120 on the light emitting surface 113 of the polarizing layer 110, which can not only support and protect the polarizing layer 110, but also can be used when the polarizing structure 100 is disposed on the display panel 200. Capable of compensating the polarized light output of liquid crystal molecules at large viewing angles; by providing a protective layer 130 on the light incident surface 111 of the polarizing layer 110, the polarizing layer 110 can be supported and protected. The cooperation of the protective layer 130 and the compensation film layer 120 can prevent Water absorption or fragmentation affects its polarization performance. The optical film layer 140 includes a film body 141 and a plurality of prism portions 143 spaced apart from the light-emitting surface 111 side of the film body 141. The shape of each prism portion 143 is The triangular prism shape allows light to pass from the optically sparse medium (that is, air) to the optically dense medium (that is, the optical film layer 140), and a junction surface that intersects with the light traveling direction is formed between the optically sparse medium and the optically dense medium. In order to make the light refract or diffuse in the process of traveling, in order to distribute the light energy of the positive viewing angle to the side viewing angle, so that the side viewing angle can also present the same picture quality as the positive viewing angle and improve the role of the viewing role, in order to avoid It is unnecessary to divide the main pixel and the sub-pixel in the display panel 200 to improve the viewing angle deviation, thereby reducing the influence of the setting of the metal wiring or the switching element on the transmittance of the display panel 200.

(2) In the polarizing structure 100 of the display device 10 described above, the distance in the third direction of the edges 1437 of the adjacent prism portions 143 is greater than or equal to the maximum width of each prism portion 143 in the third direction, which enables partial non-prism areas The light directly passes through, and the light energy at the positive viewing angle can be maintained at a certain ratio to avoid excessive reduction in brightness, and the distribution ratio of the light energy at large viewing angles can be controlled.

(3) In the polarizing structure 100 of the display device 10 described above, the optical film layer 140 is a transparent light energy distribution film layer, which facilitates light transmission and distributes the viewing angle of the light energy.

(4) The backlight module 400 of the above-mentioned display device 10 is a collimated backlight module, so that the light energy can be concentrated on the output of the positive viewing angle. By combining the polarizing structure 100, the polarizing module 300, and the backlight module 400, the positive The light-type energy of the viewing angle is allocated to the side viewing angle to solve the problem of the role of the display device 10 in the side viewing.

It is understood that the adhesive layer 150 may be omitted. When the adhesive layer 150 is omitted, an adhesive can be provided on the side of the compensation film layer 120 away from the polarizing layer 110 when the polarizing structure 100 is assembled to the display device 10, so that the polarizing structure 100 is adhered to the display panel 200. . At this time, the adhesive may be a pressure-sensitive adhesive.

It can be understood that the plurality of prism portions 143 are not limited to be arranged in the third direction, and the plurality of prism portions 143 may also be arranged in a matrix. When the plurality of prism portions 143 are arranged in a matrix, the pitch of the edges 1437 of adjacent prism portions 143 in the second direction is greater than or equal to the length of each prism portion 143 in the second direction.

It can be understood that the second direction is not limited to the direction in which the Y axis is located, and may also be the direction in which the X axis is located. Accordingly, the third direction is not limited to the direction in which the X axis is located, and may also be the direction in which the Y axis is located.

Please refer to FIG. 9 and FIG. 10 together. The structure of the polarizing structure according to another embodiment is substantially the same as that of the polarizing structure 100 except that:

The prism portion 543 has a triangular pyramid shape. The bottom surface 5431 of the prism portion 543 is bonded to the film body 541. By providing a triangular pyramid-shaped prism portion 543, it is also possible to make light from the optically sparse medium (i.e., air) to the optically dense medium (i.e., the optical film layer 540). The interface where the direction of light travel intersects, so that light is refracted or diffused in the process of traveling, so that the light energy of the positive viewing angle is distributed to the side viewing angle, so that the side viewing angle can also present the same picture quality as the positive viewing angle and improve Depending on the role. In the illustrated embodiment, the bottom surface 5431 and the second surface 5412 are both planar. The bottom surface 5431 is in contact with the second surface 5412.

Referring to FIG. 11, the prism portion 543 has a first connection surface 5433, a second connection surface 5435, and a third connection surface 5437 which intersect and are connected. The first connection surface 5433, the second connection surface 5435, and the third connection surface 5437 are all connected to the bottom surface 5431.

The angle between the first connecting surface 5433 and the bottom surface 5431 is defined as b1. The angle between the second connecting surface 5435 and the bottom surface 5431 is b2. The angle between the third connecting surface 5437 and the bottom surface 5431 is b3. In one embodiment, b1 is 15 ° to 75 °, b2 is 15 ° to 75 °, and b3 is 15 ° to 75 °. By setting b1, b2, and b3 to this range, the polarizing structure 500 can cover the general backlight type angle, so that the light traveling direction intersects the first connection surface 5433, the second connection surface 5435, and the third connection surface 5437. It is set so that the light emitted by the light source can pass through the optical film layer 540 to cause a larger degree of deflection, so as to more effectively improve the problem of the role of the visual role. Among them, the backlight light type angle is the light output angle of the backlight light source.

In one embodiment, b1 is 45 °, b2 is 45 °, and b3 is 45 °. This setting can further improve the problem of viewing angle deviation.

In one embodiment, the prism portion 543 has a regular triangular pyramid shape. By setting the prism portion 543 in a triangular pyramid shape, the light traveling direction of a general backlight light source can be intersected with the first connection surface 5433, the second connection surface 5435, and the third connection surface 5437, so that the light emitted from the light source passes through. After passing through the optical film layer 540, a larger degree of deflection can occur, and the problem of deflection of the visual character can be more effectively improved.

The plurality of prism portions 543 are arranged in a matrix. Each prism portion 543 has a vertex 5439 opposite to the bottom surface 5431. Please continue to refer to FIG. 11. In the illustrated embodiment, the vertex 5439 is an intersection of the first connection surface 5433, the second connection surface 5435, and the third connection surface 5437. The distance between the vertices 5439 of the adjacent prism portions 543 in the second direction is defined as Py. The maximum width of each prism portion 543 in the second direction is defined as Ly. In one of these embodiments, Py is greater than or equal to Ly. By making Py greater than or equal to Ly, a part of the light in the non-prism area can be directly passed, and the front-view light energy can be maintained at a certain ratio to avoid excessive decrease in brightness, and the distribution ratio of large-view-angle light energy can be controlled.

It should be noted that the pitches of the vertices 5439 of the adjacent prism portions 543 in the second direction may be all equal, or may not be completely equal, or may be completely different. Set according to actual needs. By controlling the distance between the vertices 5439 of the adjacent prism portions 543 in the second direction to control the size of different regions of the frontal light energy, the light uniformity is adjusted. It should be noted that the maximum widths of each prism portion 543 in the second direction may be all equal, or may not be completely equal, or may be completely different. Set according to actual needs. By controlling the maximum width of each prism portion 543 in the second direction to control the size of different regions of the frontal light energy, the uniformity of light is adjusted.

The distance between the vertices 5439 of the adjacent prism portions 543 in the third direction is defined as Px2. The maximum width of each prism portion 543 in the third direction is defined as Lx2. In one embodiment, Px2 is greater than or equal to Lx2. By making Px2 greater than or equal to Lx2, it is possible to directly pass the light in a part of the non-prism area, and maintain a certain proportion of the frontal light energy to avoid excessive reduction in brightness, and to control the distribution ratio of light energy at large viewing angles.

It should be noted that the pitches of the vertices 5439 of the adjacent prism portions 543 in the third direction may be all equal, or may not be completely equal, or may be completely different. Set according to actual needs. By controlling the distance in the third direction of the vertices 5439 of the adjacent prism portions 543 to control the size of different regions of the frontal light energy, the light uniformity is adjusted. It should be noted that the maximum width of each prism portion 543 in the third direction may be equal to each other, or may not be completely equal, or may be completely different. Set according to actual needs. By controlling the maximum width of each prism portion 543 in the third direction to control the size of different regions of the frontal light energy, the light uniformity is adjusted.

In one of the embodiments, Py is greater than or equal to Ly, and Px2 is greater than or equal to Lx2.

The polarizing structure of another embodiment has at least the following advantages:

The prism part 543 of the above-mentioned polarizing structure has a triangular pyramid shape, and the bottom surface 5431 of each prism part 543 is bonded to the film body 541, so that light can pass from an optically sparse medium (that is, air) to an optically dense medium (that is, the protective layer 530). ) During the process, a junction surface that intersects with the direction of light travel is formed between the light-sparse medium and the light-dense medium, so that the light is refracted or diffused during the travel, so that the light energy of the positive angle of view is distributed to the side Angle of view, so that the side view angle can also present the same picture quality as the front angle of view and improve the role of the viewing angle. The triangular pyramidal prism part 543 of the matrix arrangement can also more effectively distribute the light energy of the front angle of view into the two-dimensional direction, making Full-view viewing is more even. The above-mentioned polarizing structure does not need to divide the pixels of the display panel into a main pixel and a sub-pixel to improve the viewing role polarization.

(2) The distance between the vertices 5439 of the adjacent prism portions 543 in the above-mentioned polarizing structure in the second direction is greater than or equal to the maximum width of each prism portion 543 in the second direction, and the vertices 5439 of the adjacent prism portions 543 The distance between the three directions is greater than or equal to the maximum width of each prism portion 543 in the third direction. By making Py greater than or equal to Ly and Px2 greater than or equal to Lx2, it is possible to directly pass light in some non-prism areas, and maintain the energy of the frontal view light. A certain ratio to prevent the brightness from falling too much, and to control the distribution ratio of light energy at a large viewing angle.

The following is part of the specific embodiment:

In one embodiment, the display device may be an LCD display device (Liquid Crystal Display), an OLED (Organic Light-Emitting Diode) display device, a QLED (Quantum Dot Light Emitting Diode, quantum dot light emitting). (Diode) display devices, etc. At the same time, the display device may be a flat display device or a curved display device. It can be understood that the type of the display device includes, but is not limited to, the above examples. When the display device is an LCD display device, it may be an LCD display device such as VA (Vertical Alignment Liquid Crystal), TN (Twisted Nematic, Twisted Nematic), or IPS (In-Plane Switching). . Take the display device as a VA type liquid crystal driver as an example. The display panel is a liquid crystal display panel in which a main pixel and a sub pixel are not divided. The viewing angle measuring instrument is used to measure the change of the brightness of the display device with the gray scale in the front viewing angle and the side viewing angle. The measurement results are shown in Figure 12a). It can be seen from Fig. 12a) that the brightness of the display device in the side viewing angle quickly saturates with the voltage (as indicated by the curve indicated by arrow a-1), which causes the viewing role to be deviated from the positive viewing angle (as indicated by the curve indicated by arrow a-2). Severe deterioration.

In one embodiment, the display device may be an LCD display device (Liquid Crystal Display), an OLED (Organic Light-Emitting Diode) display device, a QLED (Quantum Dot Light Emitting Diode, quantum dot light emitting). (Diode) display devices, etc. At the same time, the display device may be a flat display device or a curved display device. It can be understood that the type of the display device includes, but is not limited to, the above examples. When the display device is an LCD display device, it may be an LCD display device such as VA (Vertical Alignment), TN (Twisted Nematic), or IPS (In-Plane Switching). Take the display device as a VA type liquid crystal driver as an example. The display panel is a liquid crystal display panel divided into a main pixel and a sub pixel, and the original signal is divided into a large voltage signal (ie, Part A) and a small voltage signal (ie, Part B). The viewing angle measuring instrument was used to measure the change of the brightness of the display device with the gray scale in the front viewing angle and the side viewing angle. The measurement results are shown in Figure 12b). It can be seen from FIG. 12 b) that the brightness of the viewing angle of the display device under a large voltage changes with the gray scale as shown by the arrow b-1, and the brightness of the viewing angle of the display device with a small voltage changes with the gray scale as shown by the arrow b-2 Refers to the curve, the combination of high voltage and low voltage to obtain the brightness of the side viewing angle changes with the gray level as shown by the arrow b-3, which is closer to the relationship between the brightness of the positive viewing angle and the gray level change (as indicated by the arrow b-4 Curve), therefore, the brightness of the side view angle varies with the signal when the relationship between the brightness of the side view angle and the positive view angle is close to that of the positive view angle.

In one embodiment, the structure of the polarizing structure of this embodiment is the same as that of the polarizing structure 100. The optical film layer is a polyethylene terephthalate layer, a1 is 45 °, and a2 is 45 °.

In one embodiment, the structure of the polarizing structure of this embodiment is the same as that of the polarizing structure 100. The optical film layer is a cellulose triacetate layer, a1 is 45 °, and a2 is 45 °.

In one embodiment, the structure of the polarizing structure of this embodiment is the same as that of the polarizing structure 100. The optical film layer is a polymethyl methacrylate layer, a1 is 45 °, and a2 is 45 °.

In one embodiment, please refer to FIGS. 9-11 together. The polarizing structure of this embodiment is the same as that of the other embodiment. The optical film layer is a polyethylene terephthalate layer, and b1 is 45. °, b2 is 45 °, and b3 is 45 °.

In one embodiment, please refer to FIGS. 9-11 together. The polarizing structure of this embodiment is the same as that of the other embodiment. The optical film layer is a cellulose triacetate layer, b1 is 45 °, and b2 is 45. °, b3 is 45 °.

In one embodiment, please refer to FIGS. 9-11 together. The polarizing structure of this embodiment is the same as that of the other embodiment. The optical film layer is a polymethyl methacrylate layer, b1 is 45 °, and b2 45 ° and b3 is 45 °.

In one embodiment, please refer to FIGS. 9 to 11 together. The polarizing structure of this embodiment is substantially the same as the polarizing structure of another embodiment, except that the optical film layer of the polarizing structure includes only the film body. No prism section is provided.

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 invention, 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 invention, several modifications and improvements can be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent shall be subject to the appended claims.

Claims (20)

A polarizing structure includes: A polarizing layer having opposite light incident surfaces and light emitting surfaces; A compensation film layer disposed on the light emitting surface; A protective layer disposed on the light incident surface; and An optical film layer includes a film body and a prism portion. The film layer body is disposed on a side of the protective layer away from the light incident surface. There are a plurality of prism portions, and a plurality of the prism portions are arranged at intervals. On a side of the film layer body far from the protective layer; wherein the structure of each of the prism portions is selected from one of a triangular prism shape and a triangular pyramid shape, and the shape of each of the prism portions is three In the case of a prism, one side of each of the prism portions is bonded to the film body, and when the shape of each of the prism portions is a triangular pyramid, the bottom surface of each of the prism portions is in contact with the film body. fit. The polarizing structure according to claim 1, wherein a first direction is perpendicular to a direction of the light incident surface, a second direction is perpendicular to the first direction, and when the shape of the prism portion is a triangular prism shape, the The prism portion extends along the second direction, and the third direction is perpendicular to both the second direction and the first direction. The arrangement manner of the plurality of prism portions is selected from the arrays arranged along the third direction and arranged in a matrix. One of them. The polarizing structure according to claim 2, wherein each of the prism portions has an edge opposite to the side surface, and a distance between the edges of the adjacent adjacent prism portions in the third direction is greater than or It is equal to a maximum width of each of the prism portions in the third direction. The polarizing structure according to claim 1, wherein when the shape of the prism portion is a triangular pyramid shape, a plurality of the prism portions are arranged in a matrix. The polarizing structure according to claim 4, wherein the first direction is a direction perpendicular to the light incident surface, the second direction is perpendicular to the first direction, and the third direction is perpendicular to the second direction and the first direction. One direction is perpendicular, and each of the prism portions has an apex opposite to the bottom surface; wherein a distance in the second direction between the apexes of adjacent prism portions is greater than or equal to each of the prisms. The maximum width of the part in the second direction, and the distance in the third direction between the vertices of the adjacent prism parts is greater than or equal to the maximum width of each of the prism parts in the third direction. The polarizing structure according to claim 1, wherein the polarizing layer is a polyvinyl alcohol layer. The polarizing structure according to claim 1, wherein a material of the compensation film layer is a material having birefringence performance. The polarizing structure according to claim 1, wherein the protective layer is selected from one of a polyethylene terephthalate layer, a cellulose triacetate layer, and a polymethyl methacrylate layer. The polarizing structure according to claim 1, wherein a refractive index of the optical film layer is 1.0 to 2.5. The polarizing structure according to claim 1, wherein a material of the optical film layer is selected from the group consisting of polyethylene terephthalate, cellulose triacetate, and polymethyl methacrylate. The polarizing structure according to claim 1, wherein a first direction is perpendicular to a direction of the light incident surface, and a maximum thickness of the optical film layer in the first direction is 20 μm to 200 μm. The polarizing structure according to claim 1, wherein a shape of each of the prism portions is selected from one of a regular triangular prism shape and a regular triangular pyramid shape. A polarizing structure includes: A polarizing layer having opposite light incident surfaces and light emitting surfaces, and the polarizing layer is a polyvinyl alcohol layer; A compensation film layer is disposed on the light emitting surface, and the material of the compensation film layer is a material having birefringence performance; A protective layer disposed on the light incident surface, the protective layer being selected from one of a polyethylene terephthalate layer, a cellulose triacetate layer, and a polymethyl methacrylate layer; and An optical film layer includes a film body and a prism portion. The film layer body is disposed on a side of the protective layer away from the light incident surface. There are a plurality of prism portions, and a plurality of the prism portions are arranged at intervals. The refractive index of the optical film layer on the side of the film layer body far from the protective layer is 1.0 to 2.5; Wherein, the shape of each of the prism portions is selected from one of a triangular prism shape and a triangular pyramid shape; when the shape of each of the prism portions is a triangular prism shape, one side surface of each of the prism portions and the prism portion The film body is bonded, the first direction is perpendicular to the direction of the light incident surface, the second direction is perpendicular to the first direction, the prism portion extends along the second direction, and the third direction is perpendicular to the second direction The direction and the first direction are both perpendicular, and the arrangement manner of the plurality of prism portions is selected from one of an arrangement along the third direction and a matrix arrangement; when the shape of each of the prism portions is a triangular pyramid shape A bottom surface of each of the prism portions is bonded to the film body, and a plurality of the prism portions are arranged in a matrix. A display device includes a polarizing structure, and the polarizing structure includes: A polarizing layer having opposite light incident surfaces and light emitting surfaces; A compensation film layer disposed on the light emitting surface; A protective layer disposed on the light incident surface; and An optical film layer includes a film body and a prism portion. The film layer body is disposed on a side of the protective layer away from the light incident surface. There are a plurality of prism portions, and a plurality of the prism portions are arranged at intervals. On a side of the film layer body far from the protective layer; wherein the structure of each of the prism portions is selected from one of a triangular prism shape and a triangular pyramid shape, and the shape of each of the prism portions is three In the case of a prism, one side of each of the prism portions is bonded to the film body, and when the shape of each of the prism portions is a triangular pyramid, the bottom surface of each of the prism portions is in contact with the film body. fit. The display device according to claim 14, further comprising a display panel, a polarizing module, and a backlight module, wherein the display panel is located at a side of the polarizing structure near the compensation film layer, and the polarizing module is located at The side of the display panel away from the polarizing structure, and the backlight module is located at the side of the polarizing structure away from the display panel. The display device according to claim 15, wherein the polarizing structure further comprises an adhesive layer, the adhesive layer is disposed on a side of the compensation film layer away from the polarizing layer, and the display panel is adhered to The side of the adhesive layer remote from the compensation film layer. The display device according to claim 15, wherein the display panel is selected from one of a liquid crystal display panel, an organic light emitting diode display panel, and a quantum dot light emitting diode display panel. The display device according to claim 15, wherein the polarizing module includes an optical compensation layer, a polarizer, and a protective film that are sequentially stacked, and the optical compensation layer is located on a side of the display panel away from the polarizing structure, The polarizer is located on a layer of the optical compensation layer away from the display panel, and the protective film is located on a layer of the polarizer away from the optical compensation layer. The display device according to claim 15, wherein the backlight module is a collimated backlight module. The display device according to claim 15, wherein the backlight module includes a reflective layer, a light guide plate, and an optical film, and the reflective layer, the light guide plate, and the optical film are close to the polarizing structure. The directions are stacked in order, and the optical film is disposed near the polarizing structure.

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