Light guide plate structure, display and preparation method

Abstract

The invention discloses a light guide plate structure, a display and a preparation method. The light guide plate structure comprises a first light guide plate layer, a mixed layer and a second light guide plate layer, the first light guide plate layer and the second light guide plate layer are light guide plate particle material layers; the mixed layer is a light guide plate particle and quantum dot particle mixed material layer; the first light guide plate layer is attached to the first surface of the mixing layer; the second light guide plate layer is attached to the second surface of the mixing layer, wherein the second surface is opposite to the first surface. The quantum dot particles are arranged between the two light guide plate layers and mixed with the light guide plate particles to form the middle layer, so that the sealing performance of the material is ensured, the problem of failure of the quantum dot particles is avoided, the product performance is optimized, and the bad problems of warping and the like caused by independent use of a quantum dot film in the prior art are solved. And the quantum dots are combined into the light guide plate, so that the assembly of one film material can be reduced, the product assembly convenience is improved, and meanwhile, the surface optical modeling treatment of the light guide plate structure is not influenced.

Description

Technical Field

[0001] The present application relates to the technical field of backlighting, and in particular to a light guide plate structure, a display and a preparation method thereof. Background Art

[0002] In the field of display technology, high color gamut displays are favored by the market because they can provide richer and more realistic color performance. At present, one technical approach to achieve high color gamut display is to use quantum dots (QD) technology. Quantum dots are a nano-scale semiconductor material whose unique optoelectronic properties make them have broad application prospects in display technology.

[0003] In the existing high color gamut display design, a typical method is to use a blue light LED (1) as a light source, and after emitting blue light (5), it is transmitted to the quantum dot film (QD film (3)) through a light guide plate (2). The quantum dot film is composed of quantum dot particles, which can emit white light with a wide color gamut under the stimulation of blue light, thereby achieving a high color gamut display effect.

[0004] The above design usually involves coating quantum dot particles on a PET (polyethylene terephthalate) substrate, laminating the upper and lower surfaces, and gluing them together to form a QD raw material. After that, it is cut through a mold to form a single film material for assembly. Figure 2 As shown, the structure of the QD film is a three-layer structure of PET (7), glue (8), and PET (10), wherein the glue (8) is mixed with QD particles (9).

[0005] However, the structure of this QD film has some technical challenges. Due to the limited thickness of the film material and the need to roll the material during the manufacturing process, the film material is prone to warping after being made into sheets. Excessive warping may affect the assembly of the display and the final display effect. In addition, due to the use of glue, delamination is prone to occur between the upper and lower layers of PET substrate, which will cause the quantum dot particles to fail, thereby affecting the color performance and overall quality of the picture.

[0006] Therefore, a new technical solution is needed to solve the warping and delamination problems existing in the existing QD film structure to improve the reliability and display effect of high color gamut displays. Summary of the invention

[0007] In view of this, the purpose of the present application is to provide a light guide plate structure, a display and a preparation method to improve the reliability and display effect of a high color gamut display.

[0008] In order to achieve the above technical objectives, the present application provides a light guide plate structure, including a first light guide plate layer, a mixed layer and a second light guide plate layer;

[0009] The first light guide plate layer and the second light guide plate layer are both light guide plate particle material layers;

[0010] The mixed layer is a mixed material layer of light guide plate particles and quantum dot particles;

[0011] The first light guide plate layer is attached to the first surface of the mixed layer;

[0012] The second light guide plate layer is attached to the second surface of the mixed layer, wherein the second surface is arranged opposite to the first surface.

[0013] Furthermore, the thickness of the second light guide plate layer is greater than the width of the light emitting surface of the LED matched therewith.

[0014] Furthermore, a Lenti microstructure is provided on a side of the first light guide plate layer away from the mixed layer;

[0015] A surface of the second light guide plate layer away from the mixed layer is provided with a mesh structure.

[0016] Furthermore, the first light guide plate layer and the mixed layer are integrally connected;

[0017] The second light guide plate layer is integrally connected to the mixed layer.

[0018] Furthermore, the first light guide plate layer, the mixed layer and the second light guide plate layer are integrally formed.

[0019] The present application also discloses a display, including the light guide plate structure.

[0020] The present application also discloses a method for preparing a light guide plate structure, which is used to prepare the light guide plate structure, comprising the steps of:

[0021] mixing light guide plate particles with quantum dot particles to prepare a mixed layer;

[0022] The light guide plate particles are used to prepare a first light guide plate layer and a second light guide plate layer respectively;

[0023] The hybrid layer is bonded between the first light guide layer and the second light guide layer.

[0024] Furthermore, the step of mixing the light guide plate particles with the quantum dot particles to prepare the mixed layer is as follows:

[0025] The light guide plate particles and the quantum dot particles are fused and injection-molded by a first screw machine to form a mixed layer.

[0026] Furthermore, the step of preparing the first light guide plate layer and the second light guide plate layer from the light guide plate particles is specifically as follows:

[0027] The light guide plate particles are injection molded in layers by a second screw machine to form a first light guide plate layer and a second light guide plate layer.

[0028] Further, the step of combining the mixed layer between the first light guide plate layer and the second light guide plate layer specifically includes:

[0029] The mixed layer is transported between the first light guide plate layer and the second light guide plate layer, and is extruded together with the first light guide plate layer and the second light guide plate layer.

[0030] It can be seen from the above technical solutions that the light guide plate structure designed in this application has the following beneficial effects:

[0031] 1. The quantum dot particles are placed between the two light guide plate layers and mixed with the light guide plate particles to form an intermediate layer. This design ensures the sealing of the material, prevents the failure of quantum dot particles, optimizes product performance, and improves the warping and other defects caused by the previous use of quantum dot film alone.

[0032] 2. Incorporating quantum dots into the light guide plate can reduce the assembly of a piece of film material, improve the convenience of product assembly, and at the same time does not affect the optical modeling treatment of the surface of the light guide plate structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0034] Figure 1 A schematic diagram of a partial structure of an existing high color gamut display provided in this application;

[0035] Figure 2 Schematic diagram of the QD film structure in this application;

[0036] Figure 3 A schematic structural diagram of a light guide plate structure provided in this application;

[0037] Figure 4 A schematic diagram of the structure for preparing the light guide plate structure provided in this application;

[0038] Figure 5 A schematic diagram of the preparation method provided in this application;

[0039] Figure 3 to Figure 4Middle: 11, first light guide plate layer; 111, lenti microstructure; 12, mixing layer; 13, second light guide plate layer; 14, first screw machine; 15, second screw machine. DETAILED DESCRIPTION

[0040] The technical solutions of the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, not all of them. All other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments in the embodiments of the present application are within the scope of protection of the embodiments of the present application.

[0041] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0042] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a replaceable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0043] The embodiments of the present application disclose a light guide plate structure, a display, and a manufacturing method.

[0044] See also Figure 3 , an embodiment of a light guide plate structure provided in the embodiments of the present application includes:

[0045] A first light guide plate layer 11 , a mixed layer 12 and a second light guide plate layer 13 .

[0046] The first light guide plate layer 11 and the second light guide plate layer 13 are both made of light guide plate particle materials, and the mixed layer 12 is a mixed material layer of light guide plate particles and quantum dot particles.

[0047] It should be noted that the light guide plate particles refer to the material particles used to prepare the original light guide plate, such as polymethyl methacrylate (PMMA) particles, polycarbonate (PC) particles, etc., while the quantum dot particles are a kind of semiconductor nanocrystal particles. The above materials are existing technologies and will not be described in detail.

[0048] The first light guide plate layer 11 is attached to the first surface of the mixed layer 12 ; the second light guide plate layer 13 is attached to the second surface of the mixed layer 12 , wherein the second surface is arranged opposite to the first surface.

[0049] The light guide plate structure designed in this application has the following beneficial effects:

[0050] 1. By placing quantum dot particles between two light guide plate layers, and mixing these quantum dot particles with light guide plate particles to form a unique intermediate layer structure. This design not only ensures the sealing of the material and effectively prevents the problem of quantum dot particle failure, but also significantly optimizes the overall performance of the product. In addition, it also solves the warping and other undesirable problems that occurred when using quantum dot film alone before, thereby improving the stability and reliability of the product.

[0051] 2. The design of integrating quantum dot particles into the light guide plate not only reduces the film material required in the product assembly process, thereby improving the convenience and efficiency of product assembly, but also keeps the optical modeling of the surface of the light guide plate structure intact. This innovative integration method not only simplifies the production process, but also ensures that the optical performance of the product will not be reduced due to the simplification of the structure, achieving a dual improvement in function and efficiency.

[0052] The above is a first embodiment of a light guide plate structure provided in the embodiment of the present application. The following is a second embodiment of a light guide plate structure provided in the embodiment of the present application. For details, please refer to Figure 3 .

[0053] Based on the solution of the above embodiment 1:

[0054] Furthermore, the second light guide plate layer 13 serves as a base material layer, and its thickness H is greater than the width of the light emitting surface of the LED matched therewith.

[0055] It should be noted that the function of the light guide plate structure is to evenly distribute the light emitted by the LED (light source) over the entire screen to achieve a uniform backlight effect. The position distribution between the LEDs is related to the specific backlight mode. For example, in the edge-entry backlight mode, the LEDs are usually located on the side of the light guide plate (see Figure 1The distribution of LED and light guide plate); while in direct backlight mode, the LED is directly located below or behind the light guide plate. The width of the light-emitting surface of the LED refers to one dimension of the size of the LED component, especially its width; the second light guide plate layer 13, as a base material layer, is the basis of the light guide plate structure and bears the task of light propagation and reflection.

[0056] By designing the thickness of the second light guide plate layer 13 to be larger than the width of the light-emitting surface of the LED matched therewith, it can be ensured that the light emitted by the LED can fully illuminate the second light guide plate layer 13, and the color conversion and uniform distribution can be carried out through the quantum dot particles in the mixing layer 12, thereby improving the brightness and color uniformity of the display.

[0057] Furthermore, a lenti microstructure 111 is provided on one side of the first light guide plate layer 11 away from the mixed layer 12. "Lenti microstructure" generally refers to a microscopic optical structure design based on a lens array, which is mainly used to achieve specific optical effects, such as naked-eye 3D display, enhanced brightness or viewing angle optimization. This structure regulates light through precisely arranged micro lenses (such as cylindrical lenses or hemispherical lenses), thereby improving display performance.

[0058] The second light guide plate layer 13 is provided with a dot structure on one side (bottom side) away from the mixed layer 12, and the dot structure is formed by laser, hot pressing, printing, fine carving, injection molding, etc. The design of the dot structure helps to further control the distribution of light, improve the uniformity and diffusion effect of light, thereby achieving a more uniform backlight effect and improving the quality of the display image.

[0059] Furthermore, the first light guide plate layer 11 and the mixed layer 12 are connected as one piece; and the second light guide plate layer 13 and the mixed layer 12 are connected as one piece.

[0060] This integrated connection design makes the layers more tightly connected, avoiding the problem of delamination or falling off during use, thereby ensuring the stability and reliability of the light guide plate structure. At the same time, the integrated connection design can also simplify the production process, improve production efficiency and reduce costs.

[0061] Furthermore, the first light guide plate layer 11, the mixed layer 12 and the second light guide plate layer 13 are integrally formed. The one-piece molding design not only further enhances the integrity and stability of the light guide plate structure, but also simplifies the production process and improves the production efficiency and yield of the product. The one-piece molding design avoids the alignment problems that may occur in the multi-layer structure during the assembly process, ensures the precise matching between the layers, and thus improves the optical performance of the product. In addition, one-piece molding can also reduce material waste in the production process, reduce production costs, and improve the market competitiveness of products. In Example 2, this one-piece molding design has been fully applied and verified, demonstrating its advantages and value in actual production.

[0062] The present application also discloses a display including the above-mentioned improved light guide plate structure.

[0063] like Figure 5 As shown, the present application also discloses a method for preparing a light guide plate structure, which is used to prepare a light guide plate structure, comprising the steps of:

[0064] S1, mixing light guide plate particles and quantum dot particles to prepare a mixed layer 12.

[0065] S2, preparing a first light guide plate layer 11 and a second light guide plate layer 13 respectively using the light guide plate particles.

[0066] S3 , combining the mixed layer 12 between the first light guide plate layer 11 and the second light guide plate layer 13 .

[0067] In further refinement of the preparation method:

[0068] Specifically, Figure 4 As shown, in step S1, the preparation of the mixed layer 12 is by mixing the light guide plate particles with the quantum dot particles. This mixing process can ensure the uniform distribution of the quantum dot particles in the light guide plate particles, thereby forming a mixed material layer with excellent optical properties. The mixing method can adopt conventional means such as mechanical stirring and ultrasonic dispersion to ensure sufficient mixing between the particles.

[0069] like Figure 4 As shown, in step S2, the preparation of the first light guide plate layer 11 and the second light guide plate layer 13 is carried out separately. In this step, the light guide plate particles are separately injection molded to form two independent light guide plate layers. During the injection molding process, the thickness, uniformity and surface quality of the light guide plate layer can be controlled by adjusting the parameters of the injection molding machine, such as injection pressure, injection speed, mold temperature, etc.

[0070] Finally, if Figure 4As shown, in step S3, the mixed layer 12 is combined between the first light guide plate layer 11 and the second light guide plate layer 13. This combination process can be achieved by multi-layer co-extrusion, that is, the mixed layer 12 is extruded together with the two light guide plate layers, and the three layers of materials are tightly combined together through the shaping effect of the mold. During the co-extrusion process, it is necessary to strictly control parameters such as extrusion speed and temperature to ensure the tight combination between the layers and the overall quality of the product.

[0071] Through this preparation method, we can efficiently prepare a light guide plate structure with excellent optical performance and stability. This structure is not only suitable for display devices such as monitors, but can also be widely used in other occasions that require efficient light guidance and uniform light emission. At the same time, this preparation method also has the advantages of simple process, low cost, and easy large-scale production, and has broad market application prospects.

[0072] Furthermore, step S1 is specifically as follows:

[0073] The light guide plate particles and quantum dot particles are fused and injection molded by the first screw machine 14 to form a mixed layer 12. In this process, the first screw machine 14 plays a key role. Its efficient mixing and injection molding capabilities ensure that the light guide plate particles and quantum dot particles can be evenly and fully fused to form a mixed layer 12 with excellent optical properties. The uniformity and stability of the mixed layer 12 are crucial to the subsequent preparation process and the performance of the final product. At the same time, the precise control of the first screw machine 14 is also the key to achieving a high-quality mixed layer 12. It can accurately adjust the injection speed, pressure, etc. according to the preset parameters to ensure that the quality of the mixed layer 12 meets the expected requirements.

[0074] Furthermore, step S2 is specifically as follows:

[0075] The light guide plate particles are injection-molded in layers by a second screw machine 15 to form a first light guide plate layer 11 and a second light guide plate layer 13 .

[0076] In this process, the second screw machine 15 also plays a key role. It forms the first light guide plate layer 11 and the second light guide plate layer 13 by layered injection molding of the light guide plate particles. Similar to the first screw machine 14, the second screw machine 15 also has efficient mixing and injection molding capabilities, which can ensure that the light guide plate particles are evenly distributed during the injection molding process, thereby forming a light guide plate layer with excellent optical properties. At the same time, the precise control of the second screw machine 15 is also the key to achieving high-quality light guide plate layers. It can ensure that the thickness, uniformity and surface quality of the light guide plate layer meet the expected requirements, laying a solid foundation for the subsequent combination process and the performance of the final product.

[0077] Further, step S3 is specifically as follows:

[0078] The mixed layer 12 is transported between the first light guide plate layer 11 and the second light guide plate layer 13 , and extruded together with the first light guide plate layer 11 and the second light guide plate layer 13 .

[0079] In this step, the co-extrusion technology is cleverly applied. By extruding the mixed layer 12 together with the two light guide plate layers, not only the close combination of the three layers of materials is achieved, but also the uniformity and stability of the entire light guide plate structure are ensured. At the same time, the co-extrusion technology can also improve production efficiency and reduce production costs, so that this innovative light guide plate structure can be more widely used in various display devices and other occasions that require efficient light guidance and uniform light emission.

[0080] In general, the above method adopts multi-screw layered injection molding to place the material mixed with quantum dot particles and light guide plate particles between two light guide plate layers in a hot melt manner to achieve an integrated plate design of the two materials.

[0081] The above is a detailed introduction to a light guide plate structure, a display and a preparation method provided in the present application. For a person skilled in the art, according to the ideas of the embodiments of the present application, there may be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A light guide plate structure, characterized in that: Comprising a first light guide plate layer (11), a mixed layer (12) and a second light guide plate layer (13); The first light guide plate layer (11) and the second light guide plate layer (13) are both light guide plate particle material layers; The mixed layer (12) is a mixed material layer of light guide plate particles and quantum dot particles; The first light guide plate layer (11) is adhered to the first surface of the mixed layer (12); The second light guide plate layer (13) is adhered to the second surface of the mixed layer (12), wherein the second surface is arranged opposite to the first surface.

2. The light guide plate structure according to claim 1, characterized in that: The thickness of the second light guide plate layer (13) is greater than the width of the light emitting surface of the LED matched therewith.

3. The light guide plate structure according to claim 1, characterized in that: A Lenti microstructure (111) is provided on a side of the first light guide plate layer (11) away from the mixed layer (12); A surface of the second light guide plate layer (13) away from the mixed layer (12) is provided with a mesh structure.

4. The light guide plate structure according to claim 1, characterized in that: The first light guide plate layer (11) and the mixed layer (12) are integrally connected; The second light guide plate layer (13) and the mixed layer (12) are integrally connected.

5. The light guide plate structure according to claim 1, characterized in that: The first light guide plate layer (11), the mixed layer (12) and the second light guide plate layer (13) are integrally formed.

6. A display, characterized in that It comprises the light guide plate structure as claimed in any one of claims 1 to 5.

7. A method for preparing a light guide plate structure, characterized in that: The method for preparing the light guide plate structure according to any one of claims 1 to 5 comprises the following steps: Mixing the light guide plate particles with the quantum dot particles to prepare a mixed layer (12); The light guide plate particles are respectively used to prepare a first light guide plate layer (11) and a second light guide plate layer (13); The mixed layer (12) is combined between the first light guide plate layer (11) and the second light guide plate layer (13).

8. The preparation method according to claim 7, characterized in that: The step of mixing the light guide plate particles with the quantum dot particles to prepare the mixed layer (12) is specifically as follows: The light guide plate particles and the quantum dot particles are fused and injection-molded by a first screw machine (14) to form a mixed layer (12).

9. The preparation method according to claim 8, characterized in that: The step of preparing the first light guide plate layer (11) and the second light guide plate layer (13) from the light guide plate particles is specifically as follows: The light guide plate particles are injection-molded in layers by a second screw machine (15) to form a first light guide plate layer (11) and a second light guide plate layer (13).

10. The preparation method according to claim 9, characterized in that: The step of combining the mixed layer (12) between the first light guide plate layer (11) and the second light guide plate layer (13) specifically comprises: The mixed layer (12) is transported between the first light guide plate layer (11) and the second light guide plate layer (13), and extruded together with the first light guide plate layer (11) and the second light guide plate layer (13).

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