Quantum rod light-emitting plate of liquid crystal box structure and manufacturing method of quantum rod light-emitting plate

Abstract

The invention discloses a quantum rod light-emitting plate of a liquid crystal box structure and a manufacturing method of the quantum rod light-emitting plate, the quantum rod light-emitting plate comprises a liquid crystal box, the liquid crystal box comprises a first transparent substrate, a second transparent substrate and a liquid crystal layer, and the liquid crystal layer is clamped between the first transparent substrate and the second transparent substrate; a first alignment layer and a second alignment layer are arranged on the inner side face of the first transparent substrate and the inner side face of the second transparent substrate respectively, and the pretilt angles of the first alignment layer and the second alignment layer are both smaller than 3 degrees. The liquid crystal layer is composed of nematic liquid crystals, and liquid crystal molecules of the liquid crystal layer are anchored by the first alignment layer and the second alignment layer to be horizontally arranged in the first axial direction. Quantum rods are uniformly dispersed in the liquid crystal layer, and are anchored by liquid crystal molecules to present a consistent first axial horizontal arrangement. The quantum rods can be in consistent and controllable first axial horizontal arrangement in the light-emitting plate, so that the polarization degree, the light-emitting efficiency and the stability of light are remarkably improved, the manufacturing process is simple, and the production cost is low.

Description

Technical Field

[0001] The invention relates to the technical field of displays, and in particular to a quantum rod light-emitting panel with a liquid crystal box structure and a manufacturing method thereof. Background Art

[0002] With the rapid development of liquid crystal display technology, the performance requirements for backlight are becoming increasingly stringent. At present, a variety of backlights have been widely used in liquid crystal display technology, and the use of a light source that directly emits polarized light as a backlight can effectively improve the brightness of the liquid crystal display and significantly reduce its power consumption.

[0003] As an advanced nano-luminescent material, quantum rods have unique luminescent properties and application prospects. Among them, an important characteristic of quantum rods is the ability to produce polarized light (polarized light refers to the vibration of light waves (electric vectors) in a specific direction). This characteristic makes quantum rods have broad application potential in the display field. In the device, in order for quantum rods to effectively generate polarized light, the quantum rods must be arranged on the plate in a consistent direction to form a quantum rod light-emitting plate. This is because only when the quantum rods are arranged in an orderly manner can the light waves they emit be polarized in a specific direction, thereby achieving a polarization effect. This requirement is crucial for the application of quantum rods in devices such as displays and polarizers. However, in practical applications, how to achieve consistent and controllable arrangement of quantum rods in a specific direction in a quantum rod light-emitting plate has become a technical problem.

[0004] Although some people have tried to control the arrangement of quantum rods through methods such as physical deposition and solution self-assembly, these methods often have problems such as complex production processes, high costs, poor arrangement uniformity, or difficulty in large-scale application, which limits the above-mentioned applications of quantum rods. Therefore, how to ensure the consistent arrangement of quantum rods while maintaining luminous efficiency and stability during large-scale production has become a key technical bottleneck that needs to be solved urgently. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a quantum rod light-emitting panel with a liquid crystal box structure and a manufacturing method thereof, which can not only realize that the quantum rods in the light-emitting panel are arranged in a consistent and controllable first axial horizontal arrangement, thereby significantly improving the polarization degree, luminous efficiency and stability of light, but also has a simple manufacturing process, low production cost, and is suitable for large-scale production. The adopted technical solution is as follows: A quantum rod light-emitting panel with a liquid crystal box structure comprises a liquid crystal box, the liquid crystal box comprises a first transparent substrate, a second transparent substrate and a liquid crystal layer, wherein the liquid crystal layer is sandwiched between the first transparent substrate and the second transparent substrate; the characteristics are that: the inner side surface of the first transparent substrate and the inner side surface of the second transparent substrate are respectively provided with a first alignment layer and a second alignment layer, the first alignment layer and the second alignment layer are both horizontal alignment layers along a first axis formed by applying directional friction in the same direction, and the pretilt angles of the first alignment layer and the second alignment layer are both less than 3°; the liquid crystal layer is composed of nematic liquid crystals, and the liquid crystal molecules of the liquid crystal layer are anchored by the first alignment layer and the second alignment layer and are arranged horizontally along the first axis; quantum rods are uniformly dispersed in the liquid crystal layer, and the quantum rods are anchored by the liquid crystal molecules and are arranged horizontally in a consistent first axis.

[0006] This quantum rod light-emitting panel adopts a liquid crystal box structure, and has a first alignment layer and a second alignment layer on both sides of its liquid crystal layer. By applying directional friction in the first axial direction to the first alignment layer and the second alignment layer, the first alignment layer and the second alignment layer form a horizontal alignment in the first axial direction, and the quantum rods are embedded in the liquid crystal layer. The liquid crystal molecules in the liquid crystal layer anchor the quantum rods, so that the liquid crystal molecules in the liquid crystal layer are anchored by the first alignment layer and the second alignment layer and present a horizontal arrangement along the first axial direction. The quantum rods are anchored by the liquid crystal molecules and present a consistent first axial horizontal arrangement. Therefore, the liquid crystal molecules can be used as an intermediary to realize the anchoring and arrangement of the quantum rods, and the consistent and controllable first axial horizontal arrangement of the quantum rods in the light-emitting panel is realized, thereby significantly improving the polarization degree of light, and can improve its luminous efficiency and stability. It is suitable for advanced displays such as liquid crystal (LCD) and mini-LED. Among them, it is particularly important to emphasize that: (1) the orientation of the first alignment layer and the second alignment layer are both in the first axis direction, which can more effectively improve the polarization degree of light; (2) by arranging the first alignment layer and the second alignment layer on both sides of the liquid crystal layer, and the first alignment layer and the second alignment layer are both horizontal alignment layers by applying directional friction in the same direction, the liquid crystal molecules in the liquid crystal layer can be anchored in opposite directions, so that the pre-tilt angles of the upper liquid crystal molecules and the lower liquid crystal molecules are opposite, and a large number of liquid crystal molecules in the middle layer are basically horizontal, further ensuring the same direction orientation, the liquid crystal molecules are more inclined to the horizontal direction, so that after anchoring, most quantum rods are also more inclined to the horizontal direction, further improving the polarization degree of light. Among them, although the upper quantum rods and the lower quantum rods have pre-tilt angles, their tilt directions are opposite, and finally the light output compensates each other without viewing angle deviation; (3) setting the pre-tilt angles of the first alignment layer and the second alignment layer to less than 3° can further ensure the horizontal arrangement of the quantum rods, avoid the tilted arrangement of the quantum rods, and cause different polarization degrees of light output at different angles.

[0007] As a preferred solution of the present invention, the first transparent substrate and the second transparent substrate are made of glass, quartz or plastic. Specifically, the first transparent substrate and the second transparent substrate are made of transparent glass with a thickness of 1.1 mm, thereby having good light transmittance and chemical stability.

[0008] As a preferred solution of the present invention, the first alignment layer and the second alignment layer are made of polyimide material, polysiloxane material or polyvinyl alcohol material.

[0009] As a preferred solution of the present invention, the quantum rod is a rod-shaped nanostructure, which is made of semiconductor material, and its length direction is consistent with the first axial horizontal arrangement direction of the liquid crystal molecules. The semiconductor material can be cadmium sulfide, zinc sulfide or zinc selenide.

[0010] As a preferred embodiment of the present invention, the quantum rods include red light quantum rods, green light quantum rods and blue light quantum rods. Red light quantum rods, green light quantum rods and blue light quantum rods refer to quantum rods with luminous colors of red light, green light and blue light, respectively. Specifically, the quantum rods are red light quantum rods and green light quantum rods made of cadmium sulfide (CdS) and zinc sulfide (ZnS), and blue light quantum rods made of zinc selenide (ZnSe) (quantum rods with luminous colors of blue light need to be excited by higher frequency blue light or ultraviolet light), with a length of about 50nm and a diameter of about 10nm. As a result, the quantum rod light-emitting plate can emit polarized light of blue, green and red to synthesize white polarized light.

[0011] As a preferred solution of the present invention, a polarizing plate is attached to one side of the liquid crystal cell, thereby further improving the polarization degree of the output light.

[0012] As a preferred embodiment of the present invention, an excitation light source is provided on one side of the liquid crystal box. The excitation light source can emit excitation light, which is used to excite the quantum rod to emit light. The excitation light source can be selected from light sources such as LED and OLED, which are used to excite the quantum rod to emit red, green and blue light.

[0013] As a further preferred embodiment of the present invention, the excitation light source adopts a blue LED. Under the excitation of a blue LED (wavelength of 450nm), the quantum rod can emit red light, green light, and blue light. After passing through a polarizer, the polarization degrees are measured to be 92% (red light), 90% (green light), and 85% (blue light), respectively, which are much higher than the polarization degree of a traditional quantum dot light-emitting panel (generally less than 70%).

[0014] As a further preferred embodiment of the present invention, a diffusion film is provided between the liquid crystal box and the excitation light source. The diffusion film can make the excitation light irradiated by the excitation light source onto the liquid crystal box more uniform, thereby making the light emission of each part of the quantum rod light emitting panel more uniform.

[0015] In actual production, by selecting appropriate transparent substrates, liquid crystal layer materials, alignment layer materials, quantum rod materials and light sources, the luminous properties of the quantum rod light-emitting panel (such as polarization, luminous efficiency and stability) can be further optimized to meet specific application requirements. For example, the liquid crystal layer can be composed of Merck's nematic liquid crystal E7, which has good stability.

[0016] The present invention also provides a method for manufacturing a quantum rod light-emitting panel, which is characterized by comprising the following steps: S1, preparing a first transparent substrate and a second transparent substrate; S2, disposing a first alignment layer and a second alignment layer on the inner side surfaces of the first transparent substrate and the second transparent substrate respectively; S3, applying directional friction in the same direction to the first alignment layer and the second alignment layer, so that the first alignment layer and the second alignment layer form a horizontal alignment in the first axial direction, and the pre-tilt angles of the first alignment layer and the second alignment layer are both less than 3°; S4, injecting nematic liquid crystal between the first alignment layer and the second alignment layer to form a liquid crystal layer, and uniformly dispersing quantum rods in the liquid crystal layer, the liquid crystal molecules of the liquid crystal layer are anchored by the first alignment layer and the second alignment layer to be horizontally arranged along the first axis, and the quantum rods are anchored by the liquid crystal molecules to be uniformly horizontally arranged along the first axis; S5, encapsulating the liquid crystal layer to form a liquid crystal box to obtain the quantum rod light-emitting panel.

[0017] In the above manufacturing method, in step S1, when preparing the first transparent substrate and the second transparent substrate, transparent glass can be used as the first transparent substrate and the second transparent substrate, and the transparent glass can be cleaned to remove impurities on the surface; in step S2, a polyimide solution can be printed on the inner side surface of the first transparent substrate and the inner side surface of the second transparent substrate by a relief printing process, and then placed in the inner cavity of an oven for curing to form a first alignment layer and a second alignment layer with a thickness of less than 50nm; in step S3, an oriented friction machine can be used to apply oriented friction in the same direction to the first alignment layer and the second alignment layer to form a horizontal alignment along a first axial direction (such as 0°); in steps S3-S4, the orientations of the first alignment layer and the second alignment layer are both in the first axial direction, which can The polarization degree of light is more effectively improved; by arranging the first alignment layer and the second alignment layer on both sides of the liquid crystal layer, and the first alignment layer and the second alignment layer are both horizontal alignment layers by applying directional friction in the same direction, the liquid crystal molecules in the liquid crystal layer can be subjected to the alignment effect in opposite directions, further ensuring the same direction orientation, and the liquid crystal molecules tend to be more horizontal, so that after anchoring, the quantum rods tend to be more horizontal, further improving the polarization degree of light; setting the pretilt angles of the first alignment layer and the second alignment layer to be less than 3° can further ensure the horizontal arrangement of the quantum rods, avoiding the tilted arrangement of the quantum rods, resulting in different polarization degrees of light emitted at different angles; in step S5, a UV-curable frame glue can be used to encapsulate the liquid crystal layer to form a liquid crystal box.

[0018] As a preferred solution of the present invention, in step S4, the quantum rods are pre-dispersed in the nematic liquid crystal, and then the nematic liquid crystal containing the quantum rods is injected between the first alignment layer and the second alignment layer to form a liquid crystal layer. Specifically, the quantum rods are firstly uniformly dispersed in the nematic liquid crystal by ultrasonic waves, and then the liquid crystal containing the quantum rods is injected between the first alignment layer and the second alignment layer by vacuum perfusion.

[0019] As a preferred embodiment of the present invention, the quantum rod in step S4 is a rod-shaped nanostructure, which is made of semiconductor material, and its length direction is consistent with the first axial horizontal arrangement direction of the liquid crystal molecules. The semiconductor material can be cadmium sulfide, zinc sulfide or zinc selenide.

[0020] As a preferred embodiment of the present invention, the quantum rods in step S4 include red light quantum rods, green light quantum rods and blue light quantum rods. Red light quantum rods, green light quantum rods and blue light quantum rods refer to quantum rods with luminous colors of red light, green light and blue light, respectively. Specifically, the quantum rods are red light quantum rods and green light quantum rods made of cadmium sulfide (CdS) and zinc sulfide (ZnS), and blue light quantum rods made of zinc selenide (ZnSe) (quantum rods with luminous colors of blue light need to be excited by higher frequency blue light or ultraviolet light), with a length of about 50nm and a diameter of about 10nm. As a result, the quantum rod light-emitting plate can emit polarized light of blue, green and red to synthesize white polarized light.

[0021] As a preferred solution of the present invention, in the step S5, after the liquid crystal layer is encapsulated to form the liquid crystal box, a polarizing plate is attached to one side of the liquid crystal box, thereby further improving the polarization degree of the output light.

[0022] As a preferred embodiment of the present invention, in step S5, after the liquid crystal layer is encapsulated to form a liquid crystal box, an excitation light source is arranged on one side of the liquid crystal box. The excitation light source can emit excitation light, and the excitation light is used to excite the quantum rod to emit light. The excitation light source can be selected from light sources such as LED and OLED, which are used to excite the quantum rod to emit red, green and blue light.

[0023] As a further preferred embodiment of the present invention, the excitation light source adopts a blue LED. Under the excitation of a blue LED (wavelength of 450nm), the quantum rod can emit red light, green light, and blue light. After passing through a polarizer, the polarization degrees are measured to be 92% (red light), 90% (green light), and 85% (blue light), respectively, which are much higher than the polarization degree of a traditional quantum dot light-emitting panel (generally less than 70%).

[0024] As a further preferred embodiment of the present invention, in step S5, a diffusion film is provided between the liquid crystal box and the excitation light source. The diffusion film can make the excitation light irradiated by the excitation light source onto the liquid crystal box more uniform, thereby making the light emission of each part of the quantum rod light emitting panel more uniform.

[0025] Compared with the prior art, the present invention has the following advantages: (1) The present invention adopts a liquid crystal box structure as the main body, and has a first alignment layer and a second alignment layer on both sides of the liquid crystal layer. By applying directional friction in the first axis to the first alignment layer and the second alignment layer, the orientation of the first alignment layer and the second alignment layer are both in the first axis, which can more effectively improve the polarization degree of light; and the liquid crystal molecules of the liquid crystal layer can be anchored in opposite directions, so that the pre-tilt angles of the upper liquid crystal molecules and the lower liquid crystal molecules are opposite, and a large number of liquid crystal molecules in the middle layer are basically horizontal, further ensuring the same direction orientation, the liquid crystal molecules are more inclined to the horizontal, so that after anchoring, most quantum rods are also more inclined to the horizontal, further improving the polarization degree of light, wherein, although the upper quantum rods and the lower quantum rods have pre-tilt angles, their tilt directions are opposite, and finally the light output compensates each other without visual angle deviation; the pre-tilt angles of the first alignment layer and the second alignment layer are set to be less than 3°, which can further ensure the horizontal arrangement of the quantum rods and avoid the tilted arrangement of the quantum rods, resulting in different polarization degrees of light output at different angles; (2) The present invention uniformly disperses and adds quantum rods in the liquid crystal layer, utilizes the anchoring effect of the first alignment layer and the second alignment layer on the liquid crystal molecules of the liquid crystal layer, and the anchoring effect of the liquid crystal molecules of the liquid crystal layer on the quantum rods, so that the liquid crystal molecules and the quantum rods are arranged in a consistent first axial horizontal manner. The liquid crystal molecules can be used as an intermediary to anchor and arrange the quantum rods, thereby achieving a consistent and controllable first axial horizontal arrangement of the quantum rods in the light-emitting panel, thereby significantly improving the polarization degree, luminous efficiency and stability of light. The present invention is suitable for advanced displays such as liquid crystal (LCD) and mini-LED, and has a simple manufacturing process, low production cost, and is suitable for large-scale production. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of a quantum rod light-emitting panel provided in a preferred embodiment of the present invention.

[0027] Figure 2 yes Figure 1 Schematic diagram of the structure of the liquid crystal box in the quantum rod light-emitting panel shown.

[0028] Figure 3 yes Figure 1 The schematic diagram of the state of the quantum rods in the quantum rod light-emitting panel under the anchoring effect of the first alignment layer and the second alignment layer is shown.

[0029] Figure 4 yes Figure 1 The optical principle diagram of the liquid crystal layer in the quantum rod light-emitting panel under the excitation of the excitation light source is shown. DETAILED DESCRIPTION

[0030] like Figure 1-Figure 4As shown, the quantum rod light-emitting panel of the liquid crystal box structure includes a liquid crystal box 1, the liquid crystal box 1 includes a first transparent substrate 11, a second transparent substrate 12 and a liquid crystal layer 13, the liquid crystal layer 13 is sandwiched between the first transparent substrate 11 and the second transparent substrate 12; the inner side surface of the first transparent substrate 11 and the inner side surface of the second transparent substrate 12 are respectively provided with a first alignment layer 14 and a second alignment layer 15, the first alignment layer 14 and the second alignment layer 15 are both horizontal alignment layers along the first axial direction 50 formed by applying directional friction in the same direction, and the pretilt angles of the first alignment layer 14 and the second alignment layer 15 are both less than 3°; the liquid crystal layer 13 is composed of nematic liquid crystals, and the liquid crystal molecules 131 of the liquid crystal layer 13 are anchored by the first alignment layer 14 and the second alignment layer 15 and are horizontally arranged along the first axial direction 50; the quantum rods 16 are uniformly dispersed in the liquid crystal layer 13, and the quantum rods 16 are anchored by the liquid crystal molecules 131 and are uniformly horizontally arranged along the first axial direction 50.

[0031] In this embodiment, the first transparent substrate 11 and the second transparent substrate 12 are made of transparent glass with a thickness of 1.1 mm, so as to have good light transmittance and chemical stability.

[0032] In this embodiment, the liquid crystal layer 13 is composed of Merck's nematic liquid crystal E7, which has good stability.

[0033] In this embodiment, the first alignment layer 14 and the second alignment layer 15 are made of polyimide material.

[0034] In this embodiment, the quantum rod 16 is a rod-shaped nanostructure made of semiconductor material, and its length direction is consistent with the horizontal arrangement direction of the first axis 50 of the liquid crystal molecules 131. The semiconductor material can be cadmium sulfide, zinc sulfide or zinc selenide.

[0035] In this embodiment, the quantum rod 16 includes a red light quantum rod, a green light quantum rod and a blue light quantum rod. The red light quantum rod, the green light quantum rod and the blue light quantum rod refer to quantum rods with luminous colors of red light, green light and blue light, respectively. Specifically, the quantum rods are red light quantum rods and green light quantum rods made of cadmium sulfide (CdS) and zinc sulfide (ZnS), and blue light quantum rods made of zinc selenide (ZnSe) (the quantum rods with luminous colors of blue light need to be excited by higher frequency blue light or ultraviolet light), with a length of about 50nm and a diameter of about 10nm. As a result, the quantum rod light-emitting plate can emit polarized light of blue, green and red to synthesize white polarized light.

[0036] In this embodiment, a polarizing plate 2 is attached to one side of the liquid crystal cell 1, thereby further improving the polarization degree of the output light.

[0037] In this embodiment, an excitation light source 3 is provided on one side of the liquid crystal box 1, and the excitation light source 3 adopts a blue light LED. The excitation light source 3 can emit an excitation light 31, and the excitation light 31 is used to excite the quantum rod 16 to emit light. The excitation light source 3 adopts a blue light LED. Under the excitation of the blue light LED (wavelength of 450nm), the quantum rod 16 can emit red light, green light, and blue light. After passing through the polarizer 2, the polarization degrees are measured to be 92% (red light), 90% (green light), and 85% (blue light), which are much higher than the polarization degree of the traditional quantum rod light-emitting plate (generally less than 70%). A diffusion film 4 is provided between the liquid crystal box 1 and the excitation light source 3, which can make the light emitted by the excitation light source 3 on the liquid crystal box 1 more uniform, thereby making the light emission of each part of the quantum rod light-emitting plate more uniform.

[0038] The present invention also provides a method for manufacturing a quantum rod light-emitting panel, comprising the following steps: S1, preparing a first transparent substrate 11 and a second transparent substrate 12, and cleaning the transparent glass to remove impurities on the surface thereof; S2, printing a polyimide solution on the inner side surface of the first transparent substrate 11 and the inner side surface of the second transparent substrate 12 by a relief printing process, and then putting them into an inner cavity of an oven for curing to form a first alignment layer 14 and a second alignment layer 15; S3, using an oriented friction machine to apply oriented friction in the same direction to the first alignment layer 14 and the second alignment layer 15, so that the first alignment layer 14 and the second alignment layer 15 form a horizontal alignment in the first axial direction 50 (such as 0°), and the pre-tilt angles of the first alignment layer 14 and the second alignment layer 15 are both less than 3°; S4, pre-dispersing the quantum rods 16 in the nematic liquid crystal, and then injecting the nematic liquid crystal containing the quantum rods 16 between the first alignment layer 14 and the second alignment layer 15 to form a liquid crystal layer 13; the liquid crystal molecules 131 of the liquid crystal layer 13 are anchored by the first alignment layer 14 and the second alignment layer 15 and are arranged horizontally along the first axis 50, and the quantum rods 16 are anchored by the liquid crystal molecules 131 and are arranged horizontally along the first axis 50 in a consistent manner; S5. Use ultraviolet curing frame glue 17 to encapsulate the liquid crystal layer 13 to form a liquid crystal cell 1, and obtain a quantum rod light-emitting panel.

[0039] In the above steps S3-S4, by arranging the first alignment layer 14 and the second alignment layer 15 on both sides of the liquid crystal layer 13, and the first alignment layer 14 and the second alignment layer 15 are both horizontal alignment layers by applying directional friction in the same direction, the liquid crystal molecules 131 of the liquid crystal layer 13 can be anchored in opposite directions, so that the pre-tilt angles of the upper liquid crystal molecules 131 and the lower liquid crystal molecules 131 are opposite, and a large number of liquid crystal molecules 131 in the middle layer are basically horizontal, further ensuring the same direction orientation, the liquid crystal molecules 131 are more horizontal, so that after anchoring, most of the quantum rods 16 are also more horizontal, further improving the polarization degree of light, wherein, although the upper quantum rods 16 and the lower quantum rods 16 have pre-tilt angles, their tilt directions are opposite, and finally the light output compensates each other without viewing angle deviation.

[0040] In this embodiment, in step S4, the quantum rods 16 are pre-dispersed in the nematic liquid crystal, and then the nematic liquid crystal containing the quantum rods 16 is injected between the first alignment layer 14 and the second alignment layer 15 to form the liquid crystal layer 13. Specifically, the quantum rods 16 are firstly uniformly dispersed in the nematic liquid crystal by ultrasonic waves, and then the nematic liquid crystal containing the quantum rods 16 is injected between the first alignment layer 14 and the second alignment layer 15 by vacuum perfusion method.

[0041] In this embodiment, the quantum rod 16 in step S4 is a rod-shaped nanostructure made of semiconductor material, and its length direction is consistent with the horizontal arrangement direction of the first axis 50 of the liquid crystal molecules 131. The semiconductor material can be cadmium sulfide, zinc sulfide or zinc selenide.

[0042] In this embodiment, the quantum rod 16 in step S4 includes a red light quantum rod, a green light quantum rod and a blue light quantum rod. The red light quantum rod, the green light quantum rod and the blue light quantum rod refer to quantum rods with luminous colors of red light, green light and blue light, respectively. Specifically, the quantum rods are red light quantum rods and green light quantum rods made of cadmium sulfide (CdS) and zinc sulfide (ZnS), and blue light quantum rods made of zinc selenide (ZnSe) (quantum rods with luminous colors of blue light need to be excited by higher frequency blue light or ultraviolet light), with a length of about 50nm and a diameter of about 10nm. As a result, the quantum rod light-emitting plate can emit polarized light of blue, green and red to synthesize white polarized light.

[0043] In this embodiment, in step S5, after the liquid crystal layer 13 is encapsulated to form the liquid crystal cell 1, a polarizing plate 2 is attached to one side of the liquid crystal cell 1. This can further improve the polarization degree of the output light.

[0044] In this embodiment, in step S5 , after the liquid crystal layer 13 is encapsulated to form the liquid crystal cell 1 , an excitation light source 3 is disposed on one side of the liquid crystal cell 1 , and the excitation light source 3 is a blue light LED.

[0045] The excitation light source 3 can emit an excitation light 31, which is used to excite the quantum rod 16 to emit light; the excitation light source 3 uses a blue light LED. Under the excitation of the blue light LED (wavelength of 450nm), the quantum rod 16 can emit red light, green light, and blue light. After passing through the polarizer 2, the polarization degrees are measured to be 92% (red light), 90% (green light), and 85% (blue light), which are much higher than the polarization degrees of traditional quantum dot light-emitting panels (generally less than 70%). A diffusion film 4 is provided between the liquid crystal box 1 and the excitation light source 3, so that the excitation light 31 irradiated by the excitation light source 3 to the liquid crystal box 1 can be more uniform, thereby making the light emission of each part of the quantum rod light-emitting panel more uniform.

[0046] In addition, it should be noted that the names of the various parts of the specific embodiments described in this specification may be different, and any equivalent or simple changes made based on the structure, features and principles of the patent concept of the present invention are included in the protection scope of the patent of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A quantum rod light-emitting panel with a liquid crystal box structure, comprising a liquid crystal box, the liquid crystal box comprising a first transparent substrate, a second transparent substrate and a liquid crystal layer, the liquid crystal layer being sandwiched between the first transparent substrate and the second transparent substrate; characterized in that: The inner side surfaces of the first transparent substrate and the second transparent substrate are respectively provided with a first alignment layer and a second alignment layer, both of which are horizontal alignment layers along a first axis formed by applying directional friction in the same direction, and the pretilt angles of the first alignment layer and the second alignment layer are both less than 3°; the liquid crystal layer is composed of nematic liquid crystals, and the liquid crystal molecules of the liquid crystal layer are anchored by the first alignment layer and the second alignment layer and are horizontally arranged along the first axis; quantum rods are uniformly dispersed in the liquid crystal layer, and the quantum rods are anchored by the liquid crystal molecules and are uniformly horizontally arranged in the first axis.

2. A quantum rod light-emitting panel with a liquid crystal cell structure according to claim 1, characterized in that: The first transparent substrate and the second transparent substrate are made of glass, quartz or plastic; the first alignment layer and the second alignment layer are made of polyimide material, polysiloxane material or polyvinyl alcohol material.

3. The quantum rod light-emitting panel with a liquid crystal cell structure according to claim 1, characterized in that: The quantum rod is a rod-shaped nanostructure, which is made of semiconductor material, and the length direction of the quantum rod is consistent with the first axial horizontal arrangement direction of the liquid crystal molecules.

4. The quantum rod light-emitting panel with a liquid crystal cell structure according to claim 1, characterized in that: The quantum rods include red light quantum rods, green light quantum rods and blue light quantum rods.

5. The quantum rod light-emitting panel with a liquid crystal cell structure according to claim 1, characterized in that: A polarizing plate is attached to one side of the liquid crystal box.

6. The quantum rod light-emitting panel with a liquid crystal cell structure according to claim 1, characterized in that: An excitation light source is provided on one side of the liquid crystal box.

7. The quantum rod light-emitting panel with a liquid crystal cell structure according to claim 6, characterized in that: The excitation light source is a blue light LED.

8. The quantum rod light-emitting panel with a liquid crystal cell structure according to claim 6, characterized in that: A diffusion film is provided between the liquid crystal box and the excitation light source.

9. A method for manufacturing a quantum rod light-emitting panel, characterized in that: The steps include: S1, preparing a first transparent substrate and a second transparent substrate; S2, disposing a first alignment layer and a second alignment layer on the inner side surfaces of the first transparent substrate and the second transparent substrate respectively; S3, applying directional friction in the same direction to the first alignment layer and the second alignment layer, so that the first alignment layer and the second alignment layer form a horizontal alignment in the first axial direction, and the pre-tilt angles of the first alignment layer and the second alignment layer are both less than 3°; S4, injecting nematic liquid crystal between the first alignment layer and the second alignment layer to form a liquid crystal layer, and uniformly dispersing quantum rods in the liquid crystal layer, the liquid crystal molecules of the liquid crystal layer are anchored by the first alignment layer and the second alignment layer to be horizontally arranged along the first axis, and the quantum rods are anchored by the liquid crystal molecules to be uniformly horizontally arranged along the first axis; S5, encapsulating the liquid crystal layer to form a liquid crystal box to obtain the quantum rod light-emitting panel.

10. The method for manufacturing a quantum rod light-emitting panel according to claim 9, characterized in that: In the step S4, the quantum rods are pre-dispersed in the nematic liquid crystal, and then the nematic liquid crystal containing the quantum rods is injected between the first alignment layer and the second alignment layer to form a liquid crystal layer.

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