Quantum dot diffusion plate and display device

Abstract

The embodiment of the utility model provides a quantum dot diffusion plate and a display device.The quantum dot diffusion plate comprises a diffusion plate, an optical adhesive layer and a quantum dot plate which are sequentially arranged in a stacked mode, and the quantum dot plate comprises a first plate layer and a quantum dot film layer which are sequentially arranged in a stacked mode; the surface of one side of the first plate layer is adhered to the diffusion plate through the optical adhesive layer, the quantum dot film layer is formed on the surface of one side, far away from the diffusion plate, of the first plate layer, and the expansion coefficient of the diffusion plate is the same as that of the first plate layer.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a quantum dot diffusion plate and a display device. Background Art

[0002] In the related art, the heat resistance of quantum dot diffusion plates is poor, and interlayer debonding and separation are prone to occur at high temperatures, resulting in a significant reduction in display effects, and therefore the applicable occasions are relatively limited. Utility Model Content

[0003] The embodiments of the present application provide a quantum dot diffusion plate and a display device, which have a higher temperature resistance and better heat resistance. When the temperature is high, interlayer debonding and separation are not likely to occur, and can better meet the use needs of different occasions.

[0004] In a first aspect, an embodiment of the present application provides a quantum dot diffuser plate, comprising a diffuser plate, an optical adhesive layer and a quantum dot plate stacked in sequence, the quantum dot plate comprising a first plate layer and a quantum dot film layer stacked in sequence, one side surface of the first plate layer is bonded to the diffuser plate through the optical adhesive layer, the quantum dot film layer is formed on a side surface of the first plate layer away from the diffuser plate, and the diffusion plate and the first plate layer have the same expansion coefficient.

[0005] In some embodiments, the diffusion plate is a polystyrene plate, the first plate layer is a polystyrene plate layer, and the quantum dot film layer is a polyethylene terephthalate film layer.

[0006] In some embodiments, a first microstructure portion is provided on a surface of the first plate layer on a side away from the quantum dot film layer.

[0007] In some embodiments, a surface on one side of the first plate layer away from the quantum dot film layer is a light emitting surface of the quantum dot diffusion plate, and the first microstructure portion is a microprism portion.

[0008] In some embodiments, the quantum dot plate is a multi-layer co-extruded plate, and the first plate layer and the quantum dot film layer are formed by multi-layer co-extrusion.

[0009] In some embodiments, the quantum dot plate further includes a second plate layer, which is formed on a surface of the quantum dot film layer on a side away from the first plate layer, and a second microstructure portion is provided on a surface of the second plate layer on a side away from the quantum dot film layer.

[0010] In some embodiments, the second microstructure portion is a microlens portion; and / or the second board layer is a polystyrene board layer or a polycarbonate board layer.

[0011] In some embodiments, the quantum dot plate is a multi-layer co-extruded plate, and the first plate layer, the quantum dot film layer, and the second plate layer are formed by multi-layer co-extrusion.

[0012] In some embodiments, the diffuser plate includes a scattering diffuser plate layer, and a third microstructure portion is formed on a surface of the scattering diffuser plate on one side away from or facing the quantum dot diffuser plate, and the third microstructure portion is a microprism portion or a microlens portion.

[0013] In a second aspect, an embodiment of the present application provides a display device, comprising the quantum dot diffusion plate provided by any of the above embodiments.

[0014] In the embodiment of the present application, a diffusion plate and a first plate layer having the same expansion coefficient are arranged on both sides of the optical adhesive layer. When the quantum dot diffusion plate is heated or cooled, the diffusion plate and the first plate layer on both sides of the optical adhesive layer expand or contract synchronously, and the diffusion plate and the first plate layer exert deformation forces of opposite directions and equal or relatively close magnitudes on the optical adhesive layer, so that the forces on both sides of the optical adhesive layer are balanced or at least close to balanced, and debonding will not occur, so that the diffusion plate and the quantum dot plate are always reliably bonded, debonding and separation are avoided, and the structural integrity of the quantum dot diffusion plate when it withstands high temperatures is ensured, and the use needs of different occasions can be better met. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 is a cross-sectional structural diagram of a quantum dot diffusion plate provided in some embodiments of the present application;

[0017] Figure 2 This is another cross-sectional structural diagram of a quantum dot diffusion plate provided in some embodiments of the present application.

[0018] Description of main component symbols:

[0019] 1-quantum dot diffusion plate, 10-diffusion plate, 11-scattering diffusion plate layer, 111-third microstructure part, 20-quantum dot plate, 21-first plate layer, 211-first microstructure part, 22-quantum dot film layer, 23-second plate layer, 231-second microstructure part, 30-optical adhesive layer. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0021] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like 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 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 a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0022] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0023] The use of "suitable for" or "configured to" in this application is meant to be open and inclusive language, which does not exclude devices that are suitable for or configured to perform additional tasks or steps. In addition, the use of "based on" is meant to be open and inclusive, because the process, step, calculation or other action "based on" one or more stated conditions or values ​​can be based on additional conditions or values ​​beyond the stated values ​​in practice.

[0024] In this application, the word "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described in this application as "exemplary" is not necessarily to be construed as being preferred or advantageous over other embodiments. The following description is given to enable any technician in the field to implement and use the present application. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present application can be implemented without using these specific details. In other instances, well-known structures and processes will not be elaborated in detail to avoid obscuring the description of the present application with unnecessary details. Therefore, the present application is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in the present application.

[0025] In the related art, the heat resistance of quantum dot diffuser is poor. Since the expansion and contraction characteristics of each layer structure in the quantum dot diffuser are quite different, the quantum dot diffuser is prone to interlayer debonding and separation at high temperatures, resulting in a significant reduction in the display effect. In display devices with high temperatures during light emission, the quantum dot diffuser cannot meet the use requirements well and its application occasions are relatively limited.

[0026] like Figure 1 and Figure 2 As shown, in the first aspect, the embodiment of the present application provides a quantum dot diffusion plate 1, which has a higher temperature resistance and better heat resistance. It is not easy to debond and separate between layers at high temperatures, and can better meet the use needs of different occasions.

[0027] The quantum dot diffuser plate 1 comprises a diffuser plate 10, an optical adhesive layer 30 and a quantum dot plate 20 which are stacked in sequence, and the diffuser plate 10 and the quantum dot plate 20 are bonded and fixed by the optical adhesive layer 30. Here, the quantum dot plate 20 comprises a first plate layer 21 and a quantum dot film layer 22 which are stacked in sequence, and one side surface of the first plate layer 21 is bonded and adhered to the diffuser plate 10 by the optical adhesive layer 30, and the quantum dot film layer 22 is formed on one side surface of the first plate layer 21 away from the diffuser plate 10. The expansion coefficients of the diffuser plate 10 and the first plate layer 21 are the same.

[0028] When the quantum dot diffuser plate 1 is heated or cooled, the diffuser plate 10 and the first plate layer 21 on both sides of the optical adhesive layer 30 expand or contract synchronously, and the diffuser plate 10 and the first plate layer 21 apply deformation forces of opposite directions and equal or relatively close magnitudes to the optical adhesive layer 30, so that the forces on both sides of the optical adhesive layer 30 are balanced or at least close to balanced, and no debonding occurs, so that the diffuser plate 10 and the quantum dot plate 20 always maintain reliable bonding, avoid debonding and separation, and thus ensure the structural integrity of the quantum dot diffuser plate 1 when it withstands high temperatures. In this way, the quantum dot diffuser plate 1 is not prone to interlayer debonding and separation at high temperatures, and thus has a higher temperature resistance and better heat resistance, and can better meet the use needs of different occasions.

[0029] The materials of the diffuser plate 10, the optical adhesive layer 30 and the quantum dot plate 20 can be determined according to actual needs, and the embodiments of the present application do not limit this. In some embodiments, the diffuser plate 10 can be a polystyrene (PS) plate, the first plate layer 21 can be a polystyrene plate layer, and the quantum dot film layer 22 can be a polyethylene glycol terephthalate (PET) film layer. Since the diffuser plate 10 and the first plate layer 21 are made of the same material and have the same expansion coefficient, the above-mentioned force balance effect can be better guaranteed, thereby ensuring the bonding reliability between the diffuser plate 10 and the quantum dot plate 20.

[0030] In some embodiments, a first microstructure portion 211 may be provided on a surface of the first plate layer 21 away from the quantum dot film layer 22. The first microstructure portion 211 may diffuse the light passing through the first plate layer 21 to increase the light uniformity effect of the quantum dot diffuser plate 1.

[0031] The type of the first microstructure portion 211 can be determined according to actual needs, and the embodiment of the present application does not limit this. In some examples, the surface of one side of the first plate layer 21 away from the quantum dot film layer 22 can be the light-emitting surface of the quantum dot diffuser plate 1, and the first microstructure portion 211 can be a microprism portion. In this way, the microprism portion is arranged toward the diffuser plate 10, and the light of the quantum dot plate 20 can be diffused and then projected onto the diffuser plate 10, and the light is diffused before entering the diffuser plate 10, thereby further enhancing the uniform light effect of the quantum dot diffuser plate 1.

[0032] The molding method of the quantum dot plate 20 can be determined according to actual needs, and the embodiments of the present application do not limit this. In some embodiments, the quantum dot diffusion plate 1 can be a multi-layer co-extruded plate, and the first plate layer 21 and the quantum dot film layer 22 are formed by multi-layer co-extrusion. Here, the raw materials for the first plate layer 21 and the quantum dot film layer 22 can be respectively put into the co-extrusion die head, and the raw materials of each layer are synchronously extruded by the co-extrusion die head to form the first plate layer 21 and the quantum dot film layer 22, thereby obtaining a quantum dot plate 20 with a multi-layer co-extrusion structure.

[0033] In some embodiments, the quantum dot plate 20 may further include a second plate layer 23. The second plate layer 23 is formed on a surface of the quantum dot film layer 22 on one side away from the first plate layer 21, and a second microstructure portion 231 is provided on a surface of the second plate layer 23 on one side away from the quantum dot film layer 22. Here, the second plate layer 23 may perform uniform light diffusion or convergence and brightness enhancement on the light passing therethrough, which is not limited in the embodiments of the present application.

[0034] The type of the second microstructure portion 231 can be determined according to actual needs, and the embodiment of the present application does not limit this. In some examples, the second microstructure portion 231 can be a microlens portion, which can gather and brighten the light passing therethrough.

[0035] The material of the second board layer 23 can be determined according to actual needs, and the embodiment of the present application does not limit this. In some examples, the second board layer 23 is a polystyrene board layer or a polycarbonate (PC) board layer.

[0036] When the first plate layer 21 and the second plate layer 23 are polystyrene plate layers respectively, they have the same expansion coefficient; when the quantum dot diffusion plate 1 is heated or cooled, the first plate layer 21 and the second plate layer 23 located on both sides of the quantum dot film layer 22 expand or contract synchronously, and the first plate layer 21 and the second plate layer 23 apply deformation forces of opposite directions and equal or relatively close magnitudes to the quantum dot film layer 22, so that the forces on both sides of the quantum dot film layer 22 are balanced or at least close to balanced, and no obvious warping occurs to either side. In this way, the force structure of the quantum dot diffusion plate 1 is relatively balanced when thermal expansion and contraction occur, and no obvious warping occurs to either side, and a flat or substantially flat surface shape can be maintained, thereby eliminating or at least reducing the warping deformation of the quantum dot diffusion plate 1, and ensuring the optical performance of the quantum dot diffusion plate 1.

[0037] Similarly, when the first plate layer 21 is a polystyrene plate layer and the second plate layer 23 is a polycarbonate plate layer, the two have similar expansion coefficients; when the quantum dot diffusion plate 1 is heated or cooled, the first plate layer 21 and the second plate layer 23 located on both sides of the quantum dot film layer 22 expand or contract to a similar degree, and the first plate layer 21 and the second plate layer 23 exert deformation forces of opposite directions and similar magnitudes on the quantum dot film layer 22, so that the forces on both sides of the quantum dot film layer 22 are close to being balanced, and no obvious warping will occur to either side. In this way, the force structure of the quantum dot diffusion plate 1 is close to being balanced when thermal expansion and contraction occur, and no obvious warping will occur to either side, and a basically flat surface shape can be maintained, thereby reducing the warping deformation of the quantum dot diffusion plate 1 and ensuring the optical performance of the quantum dot diffusion plate 1.

[0038] In some embodiments, the quantum dot plate 20 may be a multi-layer co-extruded plate, wherein the first plate layer 21, the quantum dot film layer 22, and the second plate layer 23 are formed by multi-layer co-extrusion. Here, the raw materials for the first plate layer 21, the quantum dot film layer 22, and the second plate layer 23 may be respectively put into a co-extrusion die, and the raw materials of each layer may be extruded synchronously by the co-extrusion die to form the first plate layer 21, the quantum dot film layer 22, and the second plate layer 23, thereby obtaining a quantum dot plate 20 having a multi-layer co-extrusion structure.

[0039] The type of the diffuser plate 10 can be determined according to actual needs, and can be a scattering diffuser plate, a microstructure diffuser plate, etc., which is not limited in the embodiments of the present application. Here, the scattering diffuser plate can be a plate with scattering particles or bubbles scattered thereon. The scattering particles can be organic particles, inorganic particles, and other particle types, which can be incorporated into the substrate during the molding process of the scattering diffuser plate, and can diffuse and even the light; the bubbles can be formed in the substrate through a foaming process, and can also diffuse and even the light.

[0040] In some embodiments, the diffuser plate 10 may include a scattering diffuser plate layer 11, and a third microstructure portion 111 is formed on a surface of the scattering diffuser plate layer 11 on one side away from or facing the quantum dot diffuser plate 1, so as to further enhance the uniform light diffusion effect of the diffuser plate 10 or increase the brightening function of the diffuser plate 10. The type of the third microstructure portion 111 can be determined according to actual needs, and can be a type such as a microprism portion or a microlens portion, which is not limited in the embodiments of the present application. In some examples, the third microstructure portion 111 can be formed on a surface of the scattering diffuser plate layer 11 on one side away from the quantum dot diffuser plate 1; in other examples, the third microstructure portion 111 can be formed on a surface of the scattering diffuser plate layer 11 on one side facing the quantum dot diffuser plate 1.

[0041] The bonding structure of the optical adhesive layer 30 can be determined according to actual needs, and can adopt bonding structure types such as full bonding and frame bonding, which are not limited in the embodiments of the present application. In some embodiments, the optical adhesive layer 30 can cover the side surface of the quantum dot plate 20 facing the diffuser plate 10, so that the diffuser plate 10 and the quantum dot plate 20 form a full bonding structure. In other embodiments, the optical adhesive layer 30 can be arranged in a ring along the edge of the side surface of the quantum dot plate 20 facing the diffuser plate 10, so that the diffuser plate 10 and the quantum dot plate 20 form a frame bonding structure. The material of the optical adhesive layer 30 can be determined according to actual needs, and can adopt material types such as OCA (Optically Clear Adhesive) optical adhesive, which are not limited in the embodiments of the present application.

[0042] In the second aspect, the embodiment of the present application provides a display device, which includes the quantum dot diffusion plate 1 provided in any of the above embodiments. The purpose of the display device can be determined according to actual needs. It can be used as a complete machine with display function such as a television, a monitor, etc., or it can be used as a display component in an electronic device with display function such as a personal computer, a smart phone, a tablet computer, etc., and the embodiment of the present application does not limit this. The display device provided in the embodiment of the present application has the above-mentioned quantum dot diffusion plate 1. The quantum dot diffusion plate 1 is not prone to interlayer debonding and separation at high temperatures, which can effectively improve the luminous power and luminous brightness of the display device, and can better meet the use needs of different occasions.

[0043] The quantum dot diffusion plate and display device provided in the embodiments of the present application are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A quantum dot diffuser plate, characterized in that: It includes a diffusion plate, an optical adhesive layer and a quantum dot plate which are stacked in sequence, wherein the quantum dot plate includes a first plate layer and a quantum dot film layer which are stacked in sequence, one side surface of the first plate layer is bonded to the diffusion plate through the optical adhesive layer, the quantum dot film layer is formed on the side surface of the first plate layer which is away from the diffusion plate, and the diffusion plate and the first plate layer have the same expansion coefficient.

2. The quantum dot diffuser plate according to claim 1, characterized in that: The diffusion plate is a polystyrene plate, the first plate layer is a polystyrene plate layer, and the quantum dot film layer is a polyethylene terephthalate film layer.

3. The quantum dot diffuser plate according to claim 1, characterized in that: A first microstructure portion is provided on a surface of the first plate layer on a side away from the quantum dot film layer.

4. The quantum dot diffuser plate according to claim 3, characterized in that: A surface on one side of the first plate layer away from the quantum dot film layer is a light emitting surface of the quantum dot diffusion plate, and the first microstructure portion is a microprism portion.

5. The quantum dot diffuser plate according to claim 1, characterized in that: The quantum dot plate is a multi-layer co-extruded plate, and the first plate layer and the quantum dot film layer are formed by multi-layer co-extrusion.

6. The quantum dot diffuser plate according to claim 1, characterized in that: The quantum dot plate further comprises a second plate layer, which is formed on a surface of the quantum dot film layer on a side away from the first plate layer, and a second microstructure portion is provided on a surface of the second plate layer on a side away from the quantum dot film layer.

7. The quantum dot diffuser plate according to claim 6, characterized in that: The second microstructure portion is a microlens portion; and / or the second board layer is a polystyrene board layer or a polycarbonate board layer.

8. The quantum dot diffuser plate according to claim 6, characterized in that: The quantum dot plate is a multi-layer co-extruded plate, wherein the first plate layer, the quantum dot film layer and the second plate layer are formed by multi-layer co-extrusion.

9. The quantum dot diffuser plate according to claim 1, characterized in that: The diffusion plate comprises a scattering diffusion plate layer, and a third microstructure portion (111) is formed on a surface of the scattering diffusion plate on one side away from or facing the quantum dot diffusion plate. The third microstructure portion (111) is a microprism portion or a microlens portion.

10. A display device, characterized in that: A quantum dot diffuser plate comprising any one of claims 1 to 9.

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