Viewing angle control film and liquid crystal display module

Abstract

The utility model discloses a kind of viewing angle control film and liquid crystal display module.The viewing angle control film includes: a plurality of array arrangement viewing angle control microstructure;Viewing angle control microstructure includes: microstructure separation base material, microstructure separation base material is located between adjacent viewing angle control microstructure, and microstructure separation base material includes accommodating cavity;First electrode layer and second electrode layer, and first electrode layer and second electrode layer are respectively located at the top and bottom of accommodating cavity;First electrode layer and second electrode layer are energized to form electric field;Variable form layer, variable form layer is located between first electrode layer and second electrode layer, and variable form layer is deformed in accommodating cavity under the control of electric field formed by first electrode and second electrode, forms at least two kinds in concave lens, convex lens and flat mirror.The utility model embodiment can improve halo phenomenon and the phenomenon of uneven brightness.

Description

Technical Field

[0001] This utility model relates to the field of display technology, and in particular to a viewing angle control film and a liquid crystal display module. Background Technology

[0002] With the continuous development of display technology, improving the contrast ratio and energy efficiency of displays has become an important goal for the industry. In existing technologies, liquid crystal modules (LCMs) with local dimming (LD) can achieve higher contrast ratios and save power during entertainment by controlling the direct-lit diode (LED) backlight in separate zones.

[0003] However, the light emitted by direct-lit LEDs is refracted by the expansion plate and film, causing interference in different sections and creating a halo effect. Furthermore, due to the influence of the LED cover, large-angle light is blocked and cannot be effectively projected onto the liquid crystal cell, resulting in insufficient light mixing and uneven brightness. Utility Model Content

[0004] This invention provides a viewing angle control film and a liquid crystal display module to improve the halo effect and uneven brightness in local dimming.

[0005] According to one aspect of the present invention, a viewing angle control film is provided, comprising: a plurality of viewing angle control microstructures arranged in an array; the viewing angle control microstructures comprising:

[0006] A microstructured partition substrate is located between adjacent view control microstructures, and the microstructured partition substrate includes a receiving cavity;

[0007] A first electrode layer and a second electrode layer are located at the top and bottom of the receiving cavity, respectively; the first electrode layer and the second electrode layer are energized to form an electric field;

[0008] A variable shape layer is located between the first electrode layer and the second electrode layer. The variable shape layer includes an optically rarefied dielectric layer and an optically denser dielectric layer. Under the control of the electric field formed by the first electrode layer and the second electrode layer, the variable shape layer deforms within the receiving cavity to form at least two of the following: a concave lens, a convex lens, and a planar lens.

[0009] Optionally, the variable shape layer includes:

[0010] A first optically rarefied dielectric layer is located on one side of the first electrode layer; the shape of the first optically rarefied dielectric layer is variable.

[0011] An elastic metal composite layer is located on the side of the first photosensitive dielectric layer away from the first electrode layer; the elastic metal composite layer deforms under the control of an electric field.

[0012] A first optically dense dielectric layer is located on the side of the elastic metal composite layer away from the first electrode layer; the shape of the first optically dense dielectric layer is variable.

[0013] The shapes of the first optically rarefied dielectric layer and the first optically dense dielectric layer are deformed according to the deformation of the elastic metal composite layer.

[0014] Optionally, the first optically rarefied dielectric layer is an air layer;

[0015] And / or, the first optically dense dielectric layer is an insulating solution layer;

[0016] And / or, the elastic metal composite layer includes: a flexible substrate and a metal nano-transparent film, wherein the metal nano-transparent film is embedded in the flexible substrate and the metal nano-transparent film has a mesh structure.

[0017] Optionally, the microstructure separating substrate includes a first substrate structure and a second substrate structure disposed opposite to each other, both the first substrate structure and the second substrate structure being groove-shaped; the borders of the first substrate structure and the borders of the second substrate structure are disposed opposite to each other to form the receiving cavity;

[0018] The elastic metal composite layer is located between the frame of the first substrate structure and the frame of the second substrate structure, and the position of the elastic metal composite layer is fixed by the first substrate structure and the second substrate structure.

[0019] Optionally, the variable shape layer includes:

[0020] A second optically rarefied dielectric layer is located on one side of the first electrode layer; the shape of the second optically rarefied dielectric layer is variable.

[0021] A second optically dense dielectric layer is located on the side of the second optically sparse dielectric layer away from the first electrode layer; the shape of the second optically dense dielectric layer is variable.

[0022] The second optically rarefied dielectric layer deforms under the control of an electric field, and the shape of the second optically denser dielectric layer deforms according to the deformation of the second optically rarefied dielectric layer.

[0023] Alternatively, the second optically denser dielectric layer deforms under the control of an electric field, and the shape of the second optically less dense dielectric layer deforms according to the deformation of the second optically denser dielectric layer.

[0024] Optionally, the second optically densified medium layer is an inorganic solvent layer, and / or the second optically dense medium layer is an organic solvent layer.

[0025] Optionally, the variable shape layer further includes a hydrophobic dielectric layer located between the first electrode layer and the inorganic solvent layer.

[0026] Optionally, the first electrode layer includes a plurality of electrode blocks, each of which corresponds one-to-one with the view control microstructure;

[0027] The second electrode layer is a single, continuous layer.

[0028] According to another aspect of the present invention, a liquid crystal display module is provided, comprising: a stacked lamp panel and a viewing angle control film provided in any embodiment of the present invention disposed on the light-emitting surface of the lamp panel; wherein the lamp panel comprises a plurality of light-emitting diodes, and one light-emitting diode corresponds to at least two of the viewing angle control microstructures.

[0029] Optionally, the liquid crystal display module further includes: an electrode lead-out circuit;

[0030] Wherein, the first end of the electrode lead-out circuit is electrically connected to the viewing angle control film, and the second end of the electrode lead-out circuit is electrically connected to the lamp board;

[0031] Alternatively, the first end of the electrode lead-out circuit is electrically connected to the viewing angle control film, and the second end of the electrode lead-out circuit is electrically connected to the control system of the liquid crystal display module.

[0032] The technical solution of this utility model embodiment forms a viewing angle control film by arranging a microstructure array with multiple viewing angle control parameters. This viewing angle control microstructure includes a microstructure separating substrate, a first electrode layer, a second electrode layer, and a variable shape layer. Specifically, an electric field is formed between the first and second electrode layers. The variable shape layer deforms within the receiving cavity of the microstructure separating substrate according to the control of this electric field, forming at least two of the following: a concave lens, a convex lens, and a plane mirror, thereby achieving control over the LED viewing angle. Specifically, in the dark state, the light emission angle of the viewing angle control film is narrowed, which helps reduce interference between light emitted from different LEDs, thus reducing halo phenomena. In the white state, the light emission angle of the viewing angle control film is widened, which helps increase the mixing of light emitted from different LEDs, thereby improving brightness uniformity. In summary, this utility model embodiment can improve halo phenomena and brightness non-uniformity.

[0033] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 A schematic diagram of the structure of a viewing angle control membrane provided in an embodiment of this utility model;

[0036] Figure 2 A schematic diagram of a view control microstructure provided for an embodiment of this utility model;

[0037] Figure 3 A schematic diagram of a microstructure for controlling the viewing angle under the condition of constant light emission angle provided in an embodiment of this utility model;

[0038] Figure 4 A schematic diagram of a microstructure for controlling the viewing angle under conditions of expanded light emission angle provided in an embodiment of this utility model;

[0039] Figure 5 A schematic diagram of a microstructure for controlling the viewing angle when the light emission angle is narrowed, provided for an embodiment of this utility model;

[0040] Figure 6 A schematic diagram illustrating the reduced backlight emission angle when a viewing angle control film is applied to a liquid crystal display module, as provided in this embodiment of the present invention.

[0041] Figure 7 A schematic diagram illustrating the backlight emission extension when a viewing angle control film is applied to a liquid crystal display module, as provided in an embodiment of this utility model;

[0042] Figure 8 A schematic diagram of another perspective control microstructure provided in this embodiment of the utility model;

[0043] Figure 9 This is a schematic diagram of a variable shape layer under a constant viewing angle, provided by an embodiment of the present invention.

[0044] Figure 10 A schematic diagram of a variable shape layer under an expanded viewing angle is provided for an embodiment of this utility model;

[0045] Figure 11 A schematic diagram of the structure of a viewing angle control membrane in a retracted viewing angle state is provided for an embodiment of this utility model;

[0046] Figure 12 A schematic diagram of the structure of a metallic composite layer provided in an embodiment of this utility model;

[0047] Figure 13 A flowchart illustrating the fabrication process of a view-controlled microstructure provided in this embodiment of the present invention;

[0048] Figure 14 A schematic diagram of another perspective control microstructure provided in this embodiment of the utility model;

[0049] Figure 15 A schematic diagram of a view control microstructure forming a convex lens provided in an embodiment of this utility model;

[0050] Figure 16 A schematic diagram of a view control microstructure forming a concave lens provided in an embodiment of this utility model;

[0051] Figure 17 A schematic diagram of another viewing angle control membrane provided in this embodiment of the present invention;

[0052] Figure 18 This is a schematic diagram of the structure of a liquid crystal display module provided in an embodiment of the present invention;

[0053] Figure 19 This is a schematic diagram of another liquid crystal display module provided in an embodiment of the present utility model. Detailed Implementation

[0054] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0055] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0056] Figure 1 This is a schematic diagram of the structure of a viewing angle control membrane provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of a view control microstructure provided for an embodiment of the present invention. Figure 1 and Figure 2 As shown, the viewing angle control film includes a plurality of viewing angle control microstructures 100 arranged in an array. The viewing angle control microstructures 100 include:

[0057] Microstructure separating substrate 110 is located between adjacent view control microstructures 100, and includes receiving cavity 113.

[0058] The first electrode layer 120 and the second electrode layer 130 are located at the top and bottom of the receiving cavity 113, respectively; the first electrode layer 120 and the second electrode layer 130 are energized to form an electric field.

[0059] Variable shape layer 140, located between first electrode layer 120 and second electrode layer 130, includes an optically rarefied dielectric layer and an optically denser dielectric layer. Figure 1 and Figure 2 (Not shown in the image) The variable shape layer 140 deforms within the receiving cavity 113 under the control of the electric field formed by the first electrode layer and the second electrode layer, forming at least two of the following: a concave lens, a convex lens, and a plane mirror.

[0060] In this embodiment of the invention, the microstructure separating substrate 110 refers to a material used to support and separate the viewing angle control microstructure 100, typically having micron-level precision. Specifically, the microstructure separating substrate 110 can separate the viewing angle control film into multiple viewing angle control microstructures 100, that is, the viewing angle control microstructures 100 are separated by the microstructure separating substrate 110. Simultaneously, the microstructure separating substrate 110 also serves as a support and confinement structure for the viewing angle control microstructures 100, confining the first electrode layer 120, the variable shape layer 140, and the second electrode layer 130 within the viewing angle control microstructures 100. Specifically, the microstructure separating substrate 110 includes a receiving cavity 113, within which the first electrode layer 120, the variable shape layer 140, and the second electrode layer 130 are all located.

[0061] For example, the microstructure separating substrate 110 can be made of polyethylene terephthalate (PET). The first electrode layer 120 and the second electrode layer 130 can be made of indium tin oxide (ITO).

[0062] It should be noted that in the accompanying drawings provided in this embodiment of the present invention, the illustration only uses the example of the first electrode layer 120 being located at the bottom of the receiving cavity 113 and the second electrode layer 130 being located at the top of the receiving cavity 113. This does not limit the positions of the first electrode layer 120 and the second electrode layer 130; the first electrode layer 120 can also be located at the top of the receiving cavity 113, and the second electrode layer 130 can also be located at the bottom of the receiving cavity 113. The first electrode layer 120 and the second electrode layer 130 work together to form an electric field when the viewing angle control film is energized, thereby driving the shape change of the variable shape layer 140, for example, forming a concave lens, a convex lens, or a plane mirror. The shape change of the variable shape layer 140 allows the liquid crystal display screen to flexibly adjust the viewing angle.

[0063] See also Figure 2 Optionally, the microstructure separating substrate 110 includes a first substrate structure 111 and a second substrate structure 112 disposed opposite to each other. Both the first substrate structure 111 and the second substrate structure 112 are groove-shaped. The border of the first substrate structure 111 and the border of the second substrate structure 112 are disposed opposite to each other to form a receiving cavity 113.

[0064] Specifically, the principle behind how variable shape layers achieve viewpoint control is as follows.

[0065] Figure 3 This is a schematic diagram of a microstructure for controlling the viewing angle while maintaining a constant light emission angle, provided as an embodiment of the present invention. (See diagram below.) Figure 3As shown, the direction of the red arrow indicates the direction of light. For example, when an upward electric field is applied between the first electrode layer 120 and the second electrode layer 130, and the electric force generated by the electric field just overcomes the gravity of the viewing angle control microstructure itself, the variable shape layer 140 does not deform, that is, it presents the shape of a plane mirror. At this time, the viewing angle of the light directly incident on the variable shape layer 140 remains unchanged.

[0066] Figure 4 This is a schematic diagram of a microstructure for controlling the viewing angle under conditions of expanded light emission angle, provided as an embodiment of the present invention. (See diagram below.) Figure 4 As shown, the direction of the red arrow is the direction of the light. For example, when an upward electric field is applied between the first electrode layer 120 and the second electrode layer 130, and the electric field force generated by the electric field is greater than the gravity of the microstructure controlling the viewing angle, the variable shape layer 140 bulges upward, that is, it takes the shape of a convex lens. The light rays that directly enter the optically rarefied medium layer 1401 are refracted when passing through the optically dense medium layer 1402, and at this time the light rays diffuse outward.

[0067] Figure 5 This is a schematic diagram of a microstructure for controlling the viewing angle when the light emission angle is narrowed, provided as an embodiment of the present invention. (See diagram below.) Figure 5 As shown, the direction of the red arrow is the direction of the light. For example, when a downward electric field is applied between the first electrode layer 120 and the second electrode layer 130, the direction of the electric force generated by the electric field is also downward. The variable shape layer 140 is concave, that is, it is in the shape of a concave lens. At this time, the light is contracted inward.

[0068] Figure 6 This is a schematic diagram illustrating the reduction in the light-emitting angle when a viewing angle control film is applied to a liquid crystal display module, as provided in an embodiment of this utility model. Figure 7 This is a schematic diagram illustrating the outward expansion of light emission when a viewing angle control film is applied to a liquid crystal display module, as provided in an embodiment of this utility model. Figure 6 and Figure 7 As shown, the light emitted by the LEDs in the backlight module is diffused light. When the viewing angle control film narrows the viewing angle, the light appears to be constricted, meaning the angle of the light emitted from the backlight module is smaller than the angle of the light emitted by the LEDs, resulting in a narrow viewing angle. When the viewing angle control film widens the viewing angle, the light appears to be widened, meaning the angle of the light emitted from the backlight module is larger than the angle of the light emitted by the LEDs, resulting in a wide viewing angle. Furthermore, in the dark state, the viewing angle control film 10 of the liquid crystal display module exhibits the following characteristics: Figure 6 The reduced viewing angle shown helps reduce interference between light emitted from different LEDs, thus reducing halo effects. In white mode, the viewing angle control film 10 of the liquid crystal display module appears as follows: Figure 7The expanded light emission angle shown in the diagram helps to increase the mixing of light emitted by different LEDs, thereby improving brightness uniformity. In summary, this embodiment of the invention can improve halo phenomena and brightness unevenness.

[0069] The technical solution of this utility model embodiment provides a viewing angle control film composed of an array of multiple viewing angle control microstructures. The viewing angle control microstructure 100 includes a microstructure separating substrate 110, a first electrode layer 120, a second electrode layer 130, and a variable shape layer 140. Specifically, an electric field is formed between the first electrode layer 120 and the second electrode layer 130. The variable shape layer 140 deforms within the receiving cavity 113 of the microstructure separating substrate 110 according to the control of this electric field, forming at least two of the following: a concave lens, a convex lens, and a plane mirror, thereby achieving control over the light emission viewing angle. Specifically, in the dark state, the light emission viewing angle of the viewing angle control film 10 is narrowed, which helps reduce interference between light emitted by different LEDs, thus reducing halo phenomena. In the white state, the light emission viewing angle of the viewing angle control film 10 is widened, which helps increase the mixing of light emitted by different LEDs, thereby improving brightness uniformity. In summary, this utility model embodiment can improve halo phenomena and brightness non-uniformity.

[0070] Based on the above embodiments, there are various ways to set the variable shape layer 140. Several of them will be described below, but they are not intended to limit the present invention.

[0071] Figure 8 A schematic diagram of another viewpoint-controlled microstructure provided for an embodiment of this utility model. In one embodiment, as... Figure 8 As shown, optionally, the variable-shape layer 140 includes: a first optically rarefied dielectric layer 141, located on one side of the first electrode layer 120; the shape of the first optically rarefied dielectric layer 141 is variable. An elastic metal composite layer 142 is located on the side of the first optically rarefied dielectric layer 141 away from the first electrode layer 120; the elastic metal composite layer 142 deforms under the control of an electric field. A first optically dense dielectric layer 143 is located on the side of the elastic metal composite layer 142 away from the first electrode layer 120; the shape of the first optically dense dielectric layer 143 is variable. The shapes of the first optically rarefied dielectric layer 141 and the first optically dense dielectric layer 143 deform according to the deformation of the elastic metal composite layer 142.

[0072] In this embodiment of the invention, the first optically less dense dielectric layer 141 has a lower refractive index than the first optically denser dielectric layer 143, and light is refracted at the interface between the first optically less dense dielectric layer 141 and the first optically denser dielectric layer 143. By controlling the shape of this interface, the refraction angle of the emitted light can be controlled. The elastic metal composite layer 142 refers to a composite structure layer that is elastic and whose shape is affected by an electric field.

[0073] Figure 9 This is a schematic diagram of a variable shape layer under a constant viewing angle, provided by an embodiment of the present invention. Figure 10 A schematic diagram of a variable shape layer under an expanded viewing angle is provided for an embodiment of this utility model; Figure 11 This is a schematic diagram of the structure of a viewing angle control film in a retracted viewing angle state, provided as an embodiment of the present invention. Figure 9-11 As shown, the elastic metal composite layer 142 is elastic and can deform under the action of an electric field. When the elastic metal composite layer 142 deforms, the shapes of the first optically rarefied dielectric layer 141 and the first optically denser dielectric layer 143 also change accordingly. Figure 9-11 In the diagram, the red arrow points in the direction of the electric field. Furthermore, in the white state, the electric field force controls the deformation of the elastic metal composite layer 142 of the liquid crystal display module, resulting in the following: Figure 10 As shown in the diagram, the shapes of the first optically rarefied dielectric layer 141 and the first optically denser dielectric layer 143 also resemble convex lenses, expanding the light-emitting angle and thus increasing the mixing of light emitted by different LEDs, which is beneficial for improving brightness uniformity. In the dark state, the electric field force controls the deformation of the elastic metal composite layer 142, resulting in the shape shown. Figure 11 The shape of the concave lens shown corresponds to the shape of the first optically rarer dielectric layer 141 and the first optically denser dielectric layer 143, which narrows the light emission angle and reduces interference between light emitted from different LEDs, thus helping to reduce halo phenomena. In summary, this embodiment of the invention can improve halo phenomena and brightness uniformity.

[0074] See also Figures 8-11 Based on the above embodiments, optionally, the first optically rarefied dielectric layer 141 is an air layer. The air layer serves as an insulator, preventing conductivity between the elastic metal composite layer 142 and the first electrode layer 120. Furthermore, the air layer has a low refractive index, exhibiting characteristics of an optically rarefied dielectric layer. This design simplifies the structure of the viewing angle control film and makes it easier to implement.

[0075] See also Figures 8-11Based on the above embodiments, optionally, the first optically dense dielectric layer 143 is an insulating solution layer. The insulating solution layer serves as an insulator, confined within the receiving cavity 113 formed by the microstructure separating substrate 110. This helps prevent electrical conduction between the elastic metal composite layer 142 and the second electrode layer 130. Furthermore, the insulating solution layer has a high refractive index, exhibiting characteristics of an optically dense dielectric layer. This configuration simplifies the structure of the viewing angle control film and makes it easy to implement.

[0076] Figure 12 This is a schematic diagram of the structure of a metallic composite layer provided in an embodiment of the present invention. Based on the above embodiments, alternatively, such as... Figure 12 As shown, the elastic metal composite layer 142 includes: a flexible substrate 144 and a metal nano-transparent film 145. The metal nano-transparent film 145 is embedded in the flexible substrate 144 and has a mesh structure.

[0077] For example, the flexible substrate 144 can be a transparent rubber layer. The metal nano-transparent film 145 refers to a thin film made of metal material, having a nanoscale structure, capable of transmitting light and possessing excellent conductivity, and capable of bending or deforming under the action of an electric field. The mesh structure of the metal nano-transparent film 145 further enhances the elasticity and light transmittance of the elastic metal composite layer 142.

[0078] See also Figure 8 Based on the above embodiments, optionally, the microstructure separating substrate 110 includes a first substrate structure 111 and a second substrate structure 112 disposed opposite to each other, both the first substrate structure 111 and the second substrate structure 112 being groove-shaped; the edges of the first substrate structure 111 and the edges of the second substrate structure 112 are disposed opposite to each other to form a receiving cavity 113. The elastic metal composite layer 142 is located between the edges of the first substrate structure 111 and the edges of the second substrate structure 112, and the elastic metal composite layer 142 is fixed in position by the first substrate structure 111 and the second substrate structure 112.

[0079] In this embodiment of the invention, the first substrate structure 111 and the second substrate structure 112 cooperate with each other, and their groove portions can form a receiving cavity 113. The elastic metal composite layer 142 is placed between the edges of the first substrate structure 111 and the second substrate structure 112, and can remain stable under the clamping of the two substrate structures, thereby avoiding deformation due to gravity and ensuring the structural stability and reliability of the entire viewing angle control film.

[0080] Figure 13 This is a flowchart illustrating the fabrication process of a view-controlled microstructure according to an embodiment of the present invention. Figure 13As shown, exemplarily, the fabrication process of this view-controlling microstructure is as follows: Step S110: First, the first substrate structure 111 is hot-pressed to form a groove; then, a first electrode layer 120 is deposited at the bottom of the groove of the first substrate structure 111. S120: First, the second substrate structure 112 is hot-pressed to form a groove; then, a second electrode layer 130 is deposited at the bottom of the groove of the second substrate structure 112; then, an insulating solvent, i.e., a first optically dense dielectric layer 143, is injected onto the second electrode layer 130; then, an elastic metal composite layer 142 is bonded onto the second substrate structure 112. S130: The first substrate structure 111 and the second substrate structure 112 are bonded together to form the view-controlling microstructure 100.

[0081] Figure 14 A schematic diagram of another perspective-controlled microstructure provided for an embodiment of this utility model. In another embodiment, as... Figure 14 As shown, optionally, the variable shape layer 140 includes: a second optically rarer dielectric layer 151, which is located on one side of the first electrode layer 120; the shape of the second optically rarer dielectric layer 151 is variable; a second optically denser dielectric layer 152, which is located on the side of the second optically rarer dielectric layer 151 away from the first electrode layer 120; the shape of the second optically denser dielectric layer 152 is variable; wherein, the second optically rarer dielectric layer 151 deforms under the control of an electric field, and the shape of the second optically denser dielectric layer 152 deforms according to the deformation of the second optically rarer dielectric layer 151; or, the second optically denser dielectric layer 152 deforms under the control of an electric field, and the shape of the second optically rarer dielectric layer 151 deforms according to the deformation of the second optically denser dielectric layer 152.

[0082] Specifically, the second optically less dense dielectric layer 151 has a lower refractive index compared to the second optically denser dielectric layer 152. Light can be refracted at the interface between the second optically denser dielectric layer 152 and the second optically less dense dielectric layer 151. If the second optically less dense dielectric layer 151 can deform under the influence of an electric field, and the second optically less dense dielectric layer 151 and the second optically denser dielectric layer 152 are closely connected, the second optically denser dielectric layer 152 will deform according to the deformation of the second optically less dense dielectric layer 151. Alternatively, if the second optically denser dielectric layer 152 can deform under the control of an electric field, the second optically less dense dielectric layer 151 will deform according to the deformation of the second optically denser dielectric layer 152.

[0083] Figure 15 This is a schematic diagram of a microstructure for forming a convex lens with view control provided in an embodiment of the present invention. Specifically, in the white state, the electric field force controls the second optically rarefied dielectric layer 151 and the second optically denser dielectric layer 152 to appear as shown in the diagram. Figure 15 The shape of the convex lens shown expands the light-emitting angle, thereby increasing the mixing of light emitted by different LEDs and improving brightness uniformity. Figure 16 This is a schematic diagram of a microstructure forming a concave lens for viewing angle control, provided as an embodiment of the present invention. Specifically, in the dark state, the electric field force controls the second optically rarefied dielectric layer 151 and the second optically denser dielectric layer 152 to appear as shown in the diagram. Figure 16 The concave lens shape shown reduces the light emission angle, thereby reducing interference between light emitted from different LEDs and helping to reduce halo effects.

[0084] Based on the above embodiments, optionally, the second optically rarefied medium layer 151 is an inorganic solvent layer; and the second optically dense medium layer 152 is an organic solvent layer.

[0085] In this embodiment of the invention, the inorganic solvent layer refers to a liquid layer composed of inorganic substances. The inorganic solvent layer can be composed of water, salt solutions, acids, alkalis, etc. The organic solvent layer refers to a liquid layer composed of organic substances. The organic solvent layer can be composed of oils, alcohols, ketones, ethers, hydrocarbons, etc. Compared to the inorganic solvent layer, the organic solvent layer typically has a lower density. Therefore, a clear stratification phenomenon can occur between the inorganic and organic solvent layers, i.e., there will be an interface between them. Refraction occurs at the interface between the inorganic and organic solvent layers.

[0086] See also Figure 14 Based on the above embodiments, optionally, the variable shape layer 140 further includes a hydrophobic dielectric layer 153, which is located between the first electrode layer 120 and the inorganic solvent layer. In this embodiment of the invention, the hydrophobic dielectric layer 153 repels water molecules, preventing the inorganic solvent from contacting the electrode.

[0087] Figure 17 This is a schematic diagram of another viewing angle control film provided in an embodiment of the present invention; based on the above embodiments, optionally, refer to... Figure 17 The first electrode layer 120 includes multiple electrode blocks, each of which corresponds to a viewing angle control microstructure 100; the second electrode layer 130 is a single layer.

[0088] Specifically, each electrode block can be independently controlled by a circuit to adjust different areas of the first electrode layer 120. For example, in a display screen, there are both dark and bright areas. By controlling the voltage of different electrode blocks in the first electrode layer 120, the viewing angle control microstructure 100 corresponding to the dark area contracts the light viewing angle, while the viewing angle control microstructure 100 corresponding to the bright area expands the light viewing angle. This invention sets each electrode block to correspond one-to-one with the viewing angle control microstructure 100, ensuring that the operation of the electrode directly affects the corresponding microstructure, thereby achieving efficient viewing angle control and simultaneously improving halo phenomena and brightness uniformity in a single display screen.

[0089] This utility model embodiment also provides a liquid crystal display module. Figure 18 This is a schematic diagram of the structure of a liquid crystal display module provided in an embodiment of the present utility model. Figure 18 As shown, the liquid crystal display module includes: a stacked lamp panel 20 and a viewing angle control film 10 provided in any of the above embodiments disposed on the light-emitting surface of the lamp panel 20; wherein, the lamp panel 20 includes a plurality of light-emitting diodes 21, and one light-emitting diode 21 corresponds to at least two viewing angle control microstructures 100.

[0090] In this embodiment of the invention, the lamp panel 20 refers to the basic component of the backlight module, on which light-emitting diodes 21 (LEDs) are arranged in an array. Each LED 21 corresponds to at least two viewing angle control microstructures 100, which facilitates the diffusion or contraction of the light emitted by the LED 21. In addition, a light-concentrating structure 22 (also known as a plastic cup) is provided between adjacent LEDs 21. The light-concentrating structure 22 can concentrate light and also provide support.

[0091] See also Figure 18 Optionally, the liquid crystal display module further includes an electrode lead-out circuit 30; wherein, the first end of the electrode lead-out circuit 30 is electrically connected to the viewing angle control film 10, and the second end of the electrode lead-out circuit 30 is electrically connected to the lamp panel 20.

[0092] Figure 19 This is a schematic diagram of another liquid crystal display module provided in an embodiment of the present utility model. In another embodiment, as shown... Figure 19 As shown, optionally, the first end of the electrode lead-out circuit 30 is electrically connected to the viewing angle control film 10, and the second end of the electrode lead-out circuit 30 is electrically connected to the control system of the liquid crystal display module.

[0093] See also Figure 19 Based on the above embodiments, optionally, an expansion plate 40, a first diffusion layer 51, a prism 60, a second diffusion layer 61 and a liquid crystal cell 71 are sequentially arranged above the viewing angle control film 10.

[0094] The liquid crystal display module provided in this embodiment of the present invention includes the viewing angle control film 10 provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the viewing angle control film 10, which will not be described in detail here.

[0095] It should be understood that the various forms of the process shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this utility model can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this utility model can be achieved, and this is not limited herein.

[0096] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A viewing angle control membrane, characterized in that, include: Multiple viewpoints arranged in an array control microstructures; The view-controlled microstructure includes: A microstructured partition substrate is located between adjacent view control microstructures, and the microstructured partition substrate includes a receiving cavity; A first electrode layer and a second electrode layer are located at the top and bottom of the receiving cavity, respectively; the first electrode layer and the second electrode layer are energized to form an electric field; A variable shape layer is located between the first electrode layer and the second electrode layer. The variable shape layer includes an optically rarefied dielectric layer and an optically denser dielectric layer. Under the control of the electric field formed by the first electrode layer and the second electrode layer, the variable shape layer deforms within the receiving cavity to form at least two of the following: a concave lens, a convex lens, and a planar lens.

2. The viewing angle control film according to claim 1, characterized in that, The variable shape layer includes: A first optically rarefied dielectric layer is located on one side of the first electrode layer; the shape of the first optically rarefied dielectric layer is variable. An elastic metal composite layer is located on the side of the first photosensitive dielectric layer away from the first electrode layer; the elastic metal composite layer deforms under the control of an electric field. A first optically dense dielectric layer is located on the side of the elastic metal composite layer away from the first electrode layer; the shape of the first optically dense dielectric layer is variable. The shapes of the first optically rarefied dielectric layer and the first optically dense dielectric layer are deformed according to the deformation of the elastic metal composite layer.

3. The viewing angle control film according to claim 2, characterized in that, The first optically rarefied dielectric layer is an air layer; And / or, the first optically dense dielectric layer is an insulating solution layer; And / or, the elastic metal composite layer includes: a flexible substrate and a metal nano-transparent film, wherein the metal nano-transparent film is embedded in the flexible substrate and the metal nano-transparent film has a mesh structure.

4. The viewing angle control membrane according to claim 2, characterized in that, The microstructure separating substrate includes a first substrate structure and a second substrate structure disposed opposite to each other, both of which are groove-shaped; the borders of the first substrate structure and the borders of the second substrate structure are disposed opposite to each other to form the receiving cavity; The elastic metal composite layer is located between the frame of the first substrate structure and the frame of the second substrate structure, and the position of the elastic metal composite layer is fixed by the first substrate structure and the second substrate structure.

5. The viewing angle control film according to claim 1, characterized in that, The variable shape layer includes: A second optically rarefied dielectric layer is located on one side of the first electrode layer; the shape of the second optically rarefied dielectric layer is variable. A second optically dense dielectric layer is located on the side of the second optically sparse dielectric layer away from the first electrode layer; the shape of the second optically dense dielectric layer is variable. The second optically rarefied dielectric layer deforms under the control of an electric field, and the shape of the second optically denser dielectric layer deforms according to the deformation of the second optically rarefied dielectric layer. Alternatively, the second optically denser dielectric layer deforms under the control of an electric field, and the shape of the second optically less dense dielectric layer deforms according to the deformation of the second optically denser dielectric layer.

6. The viewing angle control film according to claim 5, characterized in that, The second optically rarefied medium layer is an inorganic solvent layer, and / or the second optically dense medium layer is an organic solvent layer.

7. The viewing angle control membrane according to claim 6, characterized in that, The variable shape layer further includes a hydrophobic dielectric layer located between the first electrode layer and the inorganic solvent layer.

8. The viewing angle control film according to any one of claims 1-7, characterized in that, The first electrode layer includes multiple electrode blocks, each of which corresponds one-to-one with the view control microstructure; The second electrode layer is a single, continuous layer.

9. A liquid crystal display module, characterized in that, include: A stacked lamp panel and a viewing angle control film as described in any one of claims 1-8 disposed on the light-emitting surface of the lamp panel; wherein the lamp panel includes a plurality of light-emitting diodes, and one light-emitting diode corresponds to at least two of the viewing angle control microstructures.

10. The liquid crystal display module according to claim 9, characterized in that, Also includes: Electrode lead-out circuit; Wherein, the first end of the electrode lead-out circuit is electrically connected to the viewing angle control film, and the second end of the electrode lead-out circuit is electrically connected to the lamp board; Alternatively, the first end of the electrode lead-out circuit is electrically connected to the viewing angle control film, and the second end of the electrode lead-out circuit is electrically connected to the control system of the liquid crystal display module.

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