WO2020093513A1

WO2020093513A1 - Display panel assembly and display device

Info

Publication number: WO2020093513A1
Application number: PCT/CN2018/120578
Authority: WO
Inventors: 李嘉航
Original assignee: 惠科股份有限公司
Priority date: 2018-11-09
Filing date: 2018-12-12
Publication date: 2020-05-14
Also published as: CN109164618A

Abstract

A display panel assembly (1) comprises a display panel (10), a diffuser film (11) and a voltage controller. The display panel (10) is used to display images, and comprises a light-emitting surface. The diffuser film (11) is provided at the light-emitting surface of the display panel (10), and comprises a first electrode (112), a second electrode (114) and a liquid crystal diffusion layer (115) provided between the first electrode (112) and the second electrode (114). The voltage controller is connected to the liquid crystal diffusion layer (115), and is used to adjust a voltage applied between the first electrode (112) and the second electrode (114).

Description

Display panel assembly and display device

This application requires the priority of the Chinese patent application with the application number 201811332609.3 and the application name of "display panel assembly and display device" filed on November 9, 2018 in China Patent Office. The entire content of this application is incorporated by reference in this application.

Technical field

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

Background technique

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

Liquid crystal display (LCD) is a commonly used electronic device. Because of its low power consumption, small size and light weight, it is widely favored by users.

The LCD includes TN (Twisted Nematic) mode, VA (Vertical Alignment) mode, IPS (In-P1ane Switching) mode, etc. according to the display mode. Among them, taking the VA mode as an example, it has the advantages of wide viewing angle, high contrast and no need for friction alignment, etc. It has become a commonly used display mode, but it also brings the problems of severe color cast and reduced contrast at large viewing angles, which is Because the liquid crystal molecules in the VA mode are arranged perpendicular to the upper and lower glasses in the dark state, a certain tilt occurs after the voltage is applied. Due to the different birefringence effects of the liquid crystal molecules in the VA mode, the light at the left and right viewing angles has different phase differences. Under the best contrast and brightness, under a large viewing angle, the picture is more prone to color wash-out. Although the viewing angle compensation technology of the polarizer can be used to improve the picture quality of the large viewing angle in the VA mode, it inevitably reduces the optical performance under the positive viewing angle, which causes the utilization of the light of the backlight in most use cases. Lower.

Therefore, it is necessary to find a solution that can flexibly adjust different viewing angles according to actual use requirements and take into account the picture quality under different viewing angles.

Application content

An object of the present application is to provide a display panel assembly, including but not limited to improving the image quality of a liquid crystal display panel at a large viewing angle and taking into account and flexibly adjusting the image quality at different viewing angles.

The technical solution adopted in the embodiment of the present application is: a display panel assembly, including:

Display panel, used to display the picture, including the light emitting surface;

A diffusion film, provided on the light exit surface of the display panel, including a first electrode, a second electrode, and a diffusion liquid crystal layer interposed between the first electrode and the second electrode; and

A voltage controller is connected to the diffused liquid crystal layer and adjusts the voltage applied between the first electrode and the second electrode.

In an embodiment, the diffusion film further includes an upper substrate and a lower substrate disposed opposite to the upper substrate, the first electrode is disposed on a side of the upper substrate facing the lower substrate, and the second The electrode is provided on the side of the lower substrate facing the upper substrate.

In one embodiment, the first electrode or the second electrode is one-dimensionally arranged, and includes a plurality of strip electrodes parallel to each other and arranged at intervals.

In an embodiment, any one of the first electrode and the second electrode is disposed close to the display panel.

In one embodiment, the width of the gap between the strip electrodes is less than or equal to 50 microns, and the width of the strip electrodes is less than or equal to 50 microns.

In an embodiment, the first electrode or the second electrode is two-dimensionally arranged, and includes a plurality of block electrodes arranged in an array.

In an embodiment, the width of the gap between the bulk electrodes is less than or equal to 50 microns, the width of the bulk electrode is less than or equal to 50 microns, and the length of the bulk electrode is less than or equal to 50 microns.

In one embodiment, the diffusion film is a polymer-dispersed liquid crystal film, and the diffusibility of the polymer-dispersed liquid crystal film increases according to a decrease in the voltage applied between the first electrode and the second electrode.

In one embodiment, in the polymer-dispersed liquid crystal layer, liquid crystal molecules are distributed in a polymer network in the form of liquid crystal droplets, the refractive index of the liquid crystal molecules is 1.4 to 1.52, and the refractive index of the polymer It is 1.4 ～ 1.52.

Another object of the present application is to provide a display panel assembly, including:

A voltage controller connected to the diffused liquid crystal layer and adjusting the voltage applied between the first electrode and the second electrode;

Wherein, the voltage controller adjusts the voltage applied between the first electrode and the second electrode to 0-10V.

Yet another object of the present application is to provide a display device including a display panel assembly and a backlight module provided on the backlight input side of the display panel; the display panel assembly includes:

In one embodiment, the voltage controller adjusts the voltage applied between the first electrode and the second electrode to 0-10V.

In one embodiment, the voltage controller is also connected to the backlight module, and the voltage controller synchronously controls the voltage input to the backlight module and the voltage applied between the first electrode and the second electrode Voltage.

The rate of change of the voltage input to the backlight module is different from the voltage applied between the first electrode and the second electrode.

In an embodiment, the voltage input to the backlight module and the voltage applied between the first electrode and the second electrode can be independently adjusted.

In an embodiment, the full width at half maximum of the light field of the backlight module is within ± 10 degrees.

In the display panel assembly provided by the embodiment of the present application, a diffusion film is provided in front of the light exit surface of the display panel, and a voltage controller is used to adjust the voltage applied between the first electrode and the second electrode to diffuse the liquid crystal layer. The diffusivity of the LED varies according to the voltage applied between the first electrode and the second electrode, so that the user can adjust the diffusivity of the diffusion film according to actual needs, which improves the flexibility of viewing angle adjustment and enhances the user experience. When a large viewing angle is required, the diffusion film can be increased in diffusivity by controlling the voltage, and when a small viewing angle is required, the diffusion film can be reduced in diffusivity by controlling the voltage, which not only can be observed under a large viewing angle A good display screen can also ensure better contrast at small angles, to avoid the degradation of the display screen quality when a large viewing angle is not needed, taking into account the different viewing angles and the image quality under different viewing angles, and improve the display effect. The display panel assembly and the display device can reduce the diffusivity of the diffusion film by controlling the voltage. Not only can a good display image be observed under a large viewing angle, but also a better contrast can be ensured at a small angle. The reduction in the quality of the display screen when a large viewing angle is required takes into account the different viewing angles and the image quality at different viewing angles to improve the display effect.

BRIEF DESCRIPTION

In order to more clearly explain the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required in the embodiments or exemplary technical descriptions. Obviously, the drawings in the following description are only the present application For some of the embodiments, for those of ordinary skill in the art, without paying any creative work, other drawings may be obtained based on these drawings.

1 is a schematic structural diagram of a display panel assembly provided by an embodiment of the present application;

2 is a schematic structural diagram of a diffusion film in a display panel assembly provided by an embodiment of the present application;

3 and 4 are schematic diagrams of the diffusion of the diffused liquid crystal layer;

5 is a schematic structural diagram of a first electrode of a diffusion film in a display panel assembly provided by an embodiment;

6 is a schematic diagram of a diffusion film corresponding to one direction of diffusion of the first electrode structure shown in FIG. 5;

7 is a schematic diagram of a diffusion film corresponding to another direction of diffusion of the first electrode structure shown in FIG. 5;

8 is a schematic diagram of the equivalent refractive index of the first electrode structure shown in FIG. 5 corresponding to the diffusion film;

9 is another schematic structural diagram of a first electrode of a diffusion film in a display panel assembly provided by an embodiment of the present application;

10 is a schematic diagram of the equivalent refractive index of the diffusion film corresponding to the first electrode structure shown in FIG. 9;

11 is a schematic structural diagram of a display device provided by an embodiment of the present application.

detailed description

In order to make the purpose, technical solutions and advantages of the present application more clear, the present application will be described in further detail in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

It should be noted that when a component is referred to as being “fixed” or “installed” on another component, it can be directly on the other component or indirectly on the other component. When a component is said to be "connected to" another component, it can be directly or indirectly connected to the other component. The terms "upper", "lower", "left", "right", etc. indicate the orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, only for the convenience of description, not to indicate or imply the device Or the element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meaning of the above terms can be understood according to specific circumstances. The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more, unless specifically defined otherwise.

In order to explain the technical solutions described in this application, the following detailed description will be made in conjunction with specific drawings and embodiments.

Please refer to FIGS. 1 to 3. The present application first provides a display panel assembly 1 including a display panel 10, a diffusion film 11 and a voltage controller. The voltage controller is connected to the diffusion film 11 for controlling or modulating the voltage applied between the first electrode 112 and the second electrode 114. The diffusion film 11 is provided on the light exit surface of the display panel 10 to Adjust the direction of the light.

The display panel 10 may be a liquid crystal display panel, including a lower polarizer 101, an array substrate 102, a liquid crystal layer 103, a color filter substrate 104, and an upper polarizer 105 that are sequentially stacked, or may be an OLED (Organic Light-Emitting Diode, organic light-emitting diode ) Display panel 10. The liquid crystal display panel 10 may be a liquid crystal display panel 10 such as a TN (Twisted Nematic) mode, a VA (Vertical Alignment) mode, an IPS (In-Pane Switching) mode, or the like. This application is dedicated to solving the problem of color shift under a large viewing angle, and is especially suitable for the VA mode. At the same time, it can also take into account the advantages of the VA mode itself, such as high contrast and frictionless alignment, to improve the display effect and reduce production costs. Therefore, in an alternative embodiment, the display panel 10 may be in VA mode, but it is not limited thereto.

The diffusion film 11 includes an upper substrate 111, a first electrode 112 provided on the upper substrate 111, a lower substrate 113, a second electrode 114 provided on the lower substrate 113, and a layer sandwiched between the first electrode 112 and the second electrode 114 In the inter-diffused liquid crystal layer 115, the first electrode 112 is provided on the side of the upper substrate 111 facing the lower substrate 113, and the second electrode 114 is provided on the side of the lower substrate 113 facing the upper substrate 111. The diffusibility of the diffused liquid crystal layer 115 changes according to the voltage applied between the first electrode 112 and the second electrode 114.

In one embodiment, the diffusion film 11 is a polymer-dispersed liquid crystal film, and the diffusion liquid crystal layer 115 is a polymer-dispersed liquid crystal layer. The liquid crystal molecules in the diffusion liquid crystal layer 115 are dispersed in the polymer network in the form of liquid crystal droplets 1151. The liquid crystal droplet 1151 has dielectric anisotropy. When a voltage is applied between the first electrode 112 and the second electrode 114 so that a voltage is generated between the first electrode 112 and the second electrode 114, the director of the liquid crystal droplet 1151 follows the first electrode 112 and the second electrode 114. The refractive index n _{lc of the} liquid crystal droplets 1151 matches the refractive index n _{p of the} polymer, then the light can pass through the diffused liquid crystal layer 115 unaffected or affected little, showing a high transmission state, As shown in Figure 4. When there is no voltage between the first electrode 112 and the second electrode 114, the director of the liquid crystal droplet 1151 is freely oriented, the refractive index n _{lc of the} liquid crystal droplet 1151 does not match the refractive index n _{p of the} polymer, and the liquid crystal droplet 1151 It has a strong scattering effect on light and exhibits high diffusivity, as shown in Figure 3. Therefore, by adjusting the voltage applied between the first electrode 112 and the second electrode 114, the diffusibility of the diffusion film 11 can be changed.

The diffusion film 11 is obtained by mixing a nematic liquid crystal with a polymer monomer, a photoinitiator, etc., and then using a phase separation method. Specifically, a first electrode 112 is formed on the upper substrate 111, a second electrode 114 is formed on the lower substrate 113, and a mixture of nematic liquid crystal, polymer monomer, photoinitiator, etc. is poured into the upper substrate 111 and the lower substrate 113 At the same time, a voltage is applied between the first electrode 112 and the second electrode 114, and at the same time, through the irradiation of ultraviolet light, liquid crystal molecules are precipitated from the polymer to form liquid crystal droplets. After the polymer is polymerized and cured, the liquid crystal droplets are wrapped therein . During the curing process, a voltage is applied between the first electrode 112 and the second electrode 114, which can make the arrangement of liquid crystal molecules tend to be uniform, thereby playing a certain role in the polymerization and curing process of the polymer, The polymer network can be extended and overlapped uniformly, thereby facilitating the uniform distribution of the liquid crystal droplets 1151.

The liquid crystal molecules in the liquid crystal droplets 1151 may be arranged in parallel along the axial direction, radially arranged in a radial vertical plane, or arranged along the surface of a watermelon-shaped bipolar, and of course, may also be arranged in other ways. For the parallel arrangement in the axial direction, the calculation formula of the refractive index n _lc of the liquid crystal droplets 1151 is: 1 / (n _lc ) ² = (cosθ) ² / (n _o ) ² + (sinθ) ² / (n _e ) ² , Where n _o is the refractive index of the liquid crystal molecules to ordinary light, n _e is the refractive index of the liquid crystal molecules to extraordinary light, and θ is the angle between the director of the liquid crystal droplet 1151 and the light. For the radial radial vertical arrangement and the watermelon-like bipolar arrangement, the calculation formula of the refractive index n _lc of the liquid crystal droplet 1151 is: n _lc = (n _o + n _e ) / 2, where n _o is the liquid crystal molecule For the refractive index of ordinary light, n _e is the refractive index of liquid crystal molecules for extraordinary light.

In one embodiment, the liquid crystal molecules in the diffused liquid crystal layer 115 are nematic liquid crystals with a refractive index of 1.4 to 1.52. The refractive index of the polymer is 1.4 to 1.52.

Both the upper substrate 111 and the lower substrate 113 may be selected from PMMA (Polymethyl Methacrylate), TAC (Triacetyl Cellulose), PET (Polyethylene Terephthalate, polyethylene terephthalate), etc. One or more kinds of transparent materials may be arranged in a single layer or in multiple layers. Both the first electrode 112 and the second electrode 114 may be, for example, ITO (Indium Tin Oxide), silver nanowires, graphene, ZnO (zinc oxide) transparent electrode layer, SnO ₂ (tin dioxide), PEDOT: PSS ( (3,4-ethylenedioxythiophene / polystyrene sulfonate) or carbon nanotubes and other transparent materials.

One of the first electrode 112 and the second electrode 114 is a patterned electrode, such as a patterned electrode arranged in one dimension or a patterned electrode arranged in two dimensions. Any one of the first electrode 112 and the second electrode 114 may be disposed close to the display panel 10. In this embodiment, the second electrode 114 is disposed close to the display panel 10.

In one embodiment, as shown in FIG. 5, the first electrodes 112 are arranged one-dimensionally, and include a plurality of strip-shaped electrodes 1121 arranged along the column direction. The width of the gap between the strip electrodes 1121 is less than or equal to 50 microns, and the width of the strip electrodes 1121 is less than or equal to 50 microns.

When there is no voltage between the first electrode 112 and the second electrode 114, the directors of the liquid crystal droplets 1151 in the diffused liquid crystal layer 115 are freely oriented, and the liquid crystal droplets 1151 have a strong scattering effect on light, passing through the liquid crystal droplets 1151 Of light is highly scattered, and the diffused liquid crystal layer 115 exhibits high diffusivity. At this time, the color shift of the display panel 10 under the large viewing angles on the top, bottom, left, and right sides is compensated, and the high display angles on the top, bottom, left, and right sides exhibit good display image quality.

As shown in FIGS. 6 to 8, when a voltage is applied between the first electrode 112 and the second electrode 114, an electric field with a certain tilt angle is formed between the different strip electrodes 1121 and the planar second electrode 114 (in order to Dotted line). Viewed from the up and down direction (D1 direction in FIG. 5), as shown in FIG. 6, the liquid crystal droplets 1151 are arranged along the electric field direction with a certain inclination angle, due to the refractive index n _{lc of the} liquid crystal droplets 1151 and the refraction of the polymer The rate n _p does not match, causing light scattering in the left and right directions. Viewed from the left and right directions (D2 direction in FIG. 5), as shown in FIG. 7, the electric field direction is perpendicular to the upper substrate 111 and the lower substrate 113, and the liquid crystal droplets The 1151 is also arranged in a direction perpendicular to the upper substrate 111 and the lower substrate 113, so that it is completely transmitted in the vertical direction without diffusivity (or diffusivity is very small). Therefore, the arrangement of the strip electrodes 1121 in the one-dimensional direction enables the diffused liquid crystal layer 115 to compensate the color shift in the direction perpendicular to the extension direction of the strip electrodes 1121 when a voltage is applied. That is, when a large viewing angle is not required, a voltage can be applied between the first electrode 112 and the second electrode 114, and the diffusion film 11 allows the light from the display panel 10 to be concentrated in a small angle in the up-down direction and the left-right direction, This is beneficial for improving the contrast and brightness at the small viewing angle or further positive viewing angle, and avoiding light scattering and undesired viewing angles that cause waste of light and degradation of picture quality.

For the small and medium-sized display panel 10, the required viewing angles on the upper and lower sides are usually relatively small, and the viewing angles on the left and right sides are relatively large. This solution can effectively compensate the color shift under the large viewing angles on the left and right sides. For example, for a 24-inch computer display panel 10, when the user is facing the center position of the display panel 10, the angle between the user and the rightmost or leftmost side of the display panel 10 is about 40-50 ° Between, that is, the light from the display panel 10 needs a diffusion angle of 40-50 °. At this time, a voltage can be applied between the first electrode 112 and the second electrode 114 to realize the diffusion liquid crystal layer 115 in the left-right direction 50 ° diffusion.

In an embodiment, as shown in FIGS. 9 and 10, the first electrodes 112 are arranged two-dimensionally, and include a plurality of block electrodes 1122 arranged uniformly along the row direction and the column direction. The width of the gap between the bulk electrodes 1122 is less than or equal to 50 microns, the length of the bulk electrodes 1122 may be less than or equal to 50 microns, and the width may also be less than or equal to 50 microns.

When there is no voltage between the first electrode 112 and the second electrode 114, the directors of the liquid crystal droplets 1151 in the diffusion liquid crystal layer 115 are freely oriented, and the liquid crystal droplets 1151 have a strong scattering effect on light, passing through the liquid crystal droplets 1151 Of light is highly scattered, and the diffused liquid crystal layer 115 exhibits high diffusivity. At this time, the color shift of the display panel 10 under the large viewing angles on the top, bottom, left, and right sides is compensated, and the high display angles on the top, bottom, left, and right sides exhibit good display image quality.

When a voltage is applied between the first electrode 112 and the second electrode 114, an electric field having a certain inclination angle is also formed between the bulk electrode 1122 and the planar second electrode 114. When viewed from the up-down direction (D3 direction in FIG. 9) and the left-right direction (D4 direction in FIG. 9), the electric field is inclined (the same principle as in FIG. 6 and no additional illustration), and the liquid crystal droplet 1151 has a certain value along this The electric field directions of the oblique angles are aligned. Since the refractive index n _{lc of the} liquid crystal droplet 1151 does not match the refractive index n _{p of the} polymer, light scattering is caused in both the left-right direction and the up-down direction. Thus, the arrangement of the two-dimensional bulk electrode 1122 allows the diffused liquid crystal layer 115 to simultaneously compensate for the color shift in the up-down direction and the left-right direction when a voltage is applied. Similarly, when a large viewing angle is not required, a voltage can be applied between the first electrode 112 and the second electrode 114, and the diffusion film 11 allows the light from the display panel 10 to be concentrated in a small angle in the up-down direction and the left-right direction. It is beneficial to improve the contrast and brightness at the small viewing angle or further positive viewing angle, to avoid light scattering and the reduction of the picture quality caused by the unnecessary viewing angle.

The large-size display panel 10 needs a certain degree of diffusibility in the left-right direction and the up-down direction. Therefore, this solution is particularly suitable for the large-size display panel 10, and can compensate for the large-vision role deviation in the left-right direction and the up-down direction. Improve the display screen under the large viewing angle in the left-right direction and the up-down direction and ensure a better display screen under the small viewing angle.

In an embodiment, the first electrode 112 and the second electrode 114 may be both planar electrodes. When a voltage is applied between the first electrode 112 and the second electrode 114, the diffused liquid crystal layer 115 is in two directions (left and right directions and The diffusivity in the vertical direction is the lowest.

In an embodiment, the voltage controller may control the voltage between the first electrode 112 and the second electrode 114 to be between 0 and 10V. When the voltage is 0V, the diffusion film 11 has maximum diffusivity, which is suitable for the case where a large viewing angle is required between the user and the display panel. When the voltage is 10V, the diffusion film 11 has minimum diffusivity, which is suitable for a small viewing angle between the user and the display panel.

The present application also provides a display device 3, as shown in FIG. 11, including the above-mentioned display panel assembly 1 and a backlight module 2 provided on the backlight input side of the display panel 10. The light emitted from the light source of the backlight module 2 exits through the display panel 10 and the diffusion film 11, and the user adjusts the voltage applied to the diffusion film 11 according to the increase or decrease of the viewing angle between it and the display panel 10 through the voltage controller The voltage between the first electrode 112 and the second electrode 114 gradually decreases or increases, so that the diffusion angle of the light from the display panel 10 can be adjusted to meet the needs of different viewing angles and to ensure that they are better at different viewing angles Display picture quality.

In one embodiment, the backlight module 2 is a highly directional backlight module, and the light intensity of the light exit surface of the light guide plate (for the side entry type) or the light exit surface of the diffusion plate (for the direct type) is uniform at different positions The degrees are all greater than or equal to 90%, and the FWHM (Full Width at Half Maximum) of the outgoing light field is within ± 10 °, and even better can be within ± 5 °. The light emitted by the high-directional backlight module has high collimation characteristics, on the one hand, it can improve the light utilization rate of the backlight module 2 and reduce energy consumption, and on the other hand, it is also beneficial to diffuse the liquid crystal droplets 1151 in the liquid crystal layer 115 to the light Control of the scattering or transmission of the light, thereby improving the control of the viewing angle and color shift of the diffusion film 11.

In one embodiment, the voltage controller can also be connected to the backlight module 2 for controlling the voltage input to the backlight module 2 to achieve the function of controlling the backlight brightness of the backlight module 2.

In one embodiment, the voltage controller adjusts the voltage of the input backlight module 2 and the voltage of the input diffusion film 11 synchronously, that is, when the voltage of the input diffusion film 11 changes, the input backlight module 2 changes simultaneously . Of course, the voltage change rate of the two can be different. Moreover, the voltage input to the backlight module 2 and the voltage of the diffusion film 11 can also be adjusted independently.

Specifically, when the viewing angle between the user and the display panel 10 increases, the user can adjust the voltage of the input diffusion film 11 to decrease through the voltage controller, while the voltage input to the backlight module 2 is adjusted to gradually increase , In order to ensure that the picture reduces the color cast at a large angle while also ensuring a certain brightness and contrast. Conversely, when the viewing angle between the user and the display panel 10 decreases, the voltage controller adjusts the voltage increase of the input diffusion film to reduce the diffusivity. Due to the diffusion film 11, the light is concentrated in a small angle and exits. The utilization rate is high. At this time, the voltage input to the backlight module 2 is adjusted to gradually decrease. The advantage is that it can ensure the consistency of the brightness of the display screen during the adjustment process, avoid the user's eyes from adapting to the change in brightness, and can also reduce the backlight mode. Group 2 energy consumption.

The above are only optional embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, this application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of this application shall be included in the scope of the claims of this application.

Claims

A display panel assembly, including:

Display panel, used to display the picture, including the light emitting surface;

A diffusion film, provided on the light exit surface of the display panel, including a first electrode, a second electrode, and a diffusion liquid crystal layer interposed between the first electrode and the second electrode;

A voltage controller is connected to the diffused liquid crystal layer and adjusts the voltage applied between the first electrode and the second electrode.
The display panel assembly of claim 1, wherein the diffusion film further includes an upper substrate and a lower substrate disposed opposite to the upper substrate, and the first electrode is disposed on the upper substrate toward the lower substrate On one side, the second electrode is provided on a side of the lower substrate facing the upper substrate.
The display panel assembly according to claim 1, wherein the first electrode or the second electrode is one-dimensionally arranged, and includes a plurality of strip electrodes arranged parallel to each other and spaced apart.
The display panel assembly of claim 3, wherein any one of the first electrode and the second electrode is disposed close to the display panel.
The display panel assembly of claim 3, wherein the width of the gap between the strip electrodes is less than or equal to 50 microns, and the width of the strip electrodes is less than or equal to 50 microns.
The display panel assembly of claim 1, wherein the first electrode or the second electrode is two-dimensionally arranged, and includes a plurality of block electrodes arranged in an array.
The display panel assembly of claim 6, wherein the width of the gap between the bulk electrodes is less than or equal to 50 microns, the width of the bulk electrode is less than or equal to 50 microns, and the length of the bulk electrodes Less than or equal to 50 microns.
The display panel assembly of claim 1, wherein the diffusion film is a polymer-dispersed liquid crystal film, the diffusion liquid crystal layer is a polymer-dispersed liquid crystal layer, and the diffusibility of the polymer-dispersed liquid crystal layer depends on the The voltage between the first electrode and the second electrode decreases and increases.
The display panel assembly according to claim 8, wherein in the polymer-dispersed liquid crystal layer, liquid crystal molecules are distributed in a polymer network in the form of liquid crystal droplets, and the refractive index of the liquid crystal molecules is 1.4 to 1.52. The refractive index of the polymer is 1.4-1.52.
A display panel assembly, including:

Display panel, used to display the picture, including the light emitting surface;

A diffusion film, provided on the light exit surface of the display panel, including a first electrode, a second electrode, and a diffusion liquid crystal layer interposed between the first electrode and the second electrode;

A voltage controller connected to the diffused liquid crystal layer and adjusting the voltage applied between the first electrode and the second electrode;

Wherein, the voltage controller adjusts the voltage applied between the first electrode and the second electrode to 0-10V.
A display device includes a display panel assembly and a backlight module provided on the backlight input side of the display panel; the display panel assembly includes:

Display panel, used to display the picture, including the light emitting surface;

A diffusion film, provided on the light exit surface of the display panel, including a first electrode, a second electrode, and a diffusion liquid crystal layer interposed between the first electrode and the second electrode; and

A voltage controller is connected to the diffused liquid crystal layer and adjusts the voltage applied between the first electrode and the second electrode.
The display device according to claim 11, wherein the voltage controller adjusts the voltage applied between the first electrode and the second electrode to 0 to 10V.
The display device according to claim 11, wherein the voltage controller is further connected to the backlight module, and the voltage controller synchronously controls the voltage input to the backlight module and the voltage applied to the first electrode and The voltage between the second electrodes.
The display device of claim 13, wherein a rate of change of the voltage input to the backlight module is different from the voltage applied between the first electrode and the second electrode.
The display device according to claim 11, wherein the voltage input to the backlight module and the voltage applied between the first electrode and the second electrode can be independently adjusted.
The display device according to claim 11, wherein the full width at half maximum of the light emitting field of the backlight module is within ± 10 degrees.
The display device according to claim 11, wherein the first electrode or the second electrode is one-dimensionally arranged, and includes a plurality of strip electrodes parallel to each other and arranged at intervals.
The display device according to claim 11, wherein the first electrode or the second electrode is two-dimensionally arranged and includes a plurality of block electrodes arranged in an array.