Quantum dot composite film

Abstract

A quantum dot composite film includes a plurality of quantum dots dispersed in an optical film, wherein the plurality of quantum dots are resistant to water and oxygen, and a plurality of prisms disposed on the quantum dot layer.

Description

Technical Field

[0001] This invention relates to an optical film, and more particularly to a quantum dot composite film. Background Technology

[0002] Quantum dots are tiny spherical semiconductor particles, each nanometer in size. A key characteristic of quantum dots is that they emit colored spectra when excited by light or electricity. The color of these spectra is determined by the material composition and size of the quantum dots themselves. This property allows quantum dots to alter the color of light emitted by a light source, making them widely applicable in displays. This enhances the color gamut of the display, improves the color and brightness of LCDs, and enables LCD displays to achieve an NTSC color gamut of up to 110%.

[0003] Common quantum dot materials are composed of elements IV, II-VI, IV-VI, or III-V, such as silicon quantum dots, germanium quantum dots, cadmium sulfide quantum dots, cadmium selenide quantum dots, cadmium telluride quantum dots, zinc selenide quantum dots, lead sulfide quantum dots, lead selenide quantum dots, indium phosphide quantum dots, and indium arsenide quantum dots. Currently, the most widely used quantum dot materials are the cadmium selenide (CdSe) series and the indium phosphide (InP) series. The former is mainly used by QD Vision, while the latter is mainly used by Nanoco. Nanosys uses a mixed indium phosphide and cadmium quantum dot scheme. Both types of quantum dots have their advantages and disadvantages. Cadmium selenide excels in high luminous efficiency and a wider color gamut, but it contains cadmium, a heavy metal. Indium phosphide, on the other hand, does not contain cadmium and is therefore not subject to EU RoHS standards.

[0004] Currently, the so-called "quantum dot TVs" sold on the market are all LCD TVs equipped with a quantum dot layer. They are mainly divided into tubular quantum dot backlights and film-type quantum dot backlights. The former is mainly produced by QD Vision in the United States and is called Color IQ optical element; the latter is mainly produced by Nanosys in the United States and is called QDEF film. Since the three colors of light are directly converted from blue light, quantum dot backlights have higher purity of the three primary colors compared to ordinary LED backlights. By adjusting the size distribution of quantum dot materials, a more realistic and balanced color performance can be created.

[0005] Traditional quantum dot optical film products are sandwich-structured films with gas barrier films on the top and bottom, sandwiching a quantum dot main structure layer in the middle. This main structure layer is typically a cadmium-containing, low-cadmium, or cadmium-free quantum dot optical film, with a thickness generally ranging from 50 to 300 μm. In LCD displays, these quantum dot optical films are currently stacked with incremental films before being assembled into the backlight assembly. Therefore, this increases the overall film thickness and assembly time in the backlight assembly, thereby increasing the overall thickness of the LCD display and the costs of manufacturing processes and materials.

[0006] Therefore, the present invention proposes a new solution to overcome the above-mentioned shortcomings. Summary of the Invention

[0007] In one embodiment, the present invention provides a quantum dot composite film, comprising: a quantum dot prism film including a quantum dot layer and a first plurality of prisms disposed on the quantum dot layer; a first optical prism film including a second plurality of prisms located on a first side of the first optical prism film and a first adhesive layer disposed on a second side of the first optical prism film, wherein the first side and the second side of the first optical prism film are opposite sides of the first optical prism film; and a second optical prism film including a third plurality of prisms located on a first side of the second optical prism film and a second adhesive layer disposed on a second side of the second optical prism film, wherein the first side and the second side of the second optical prism film are opposite sides of the second optical prism film, wherein the tops of the first plurality of prisms are embedded in the first adhesive layer, and the tops of the second plurality of prisms are embedded in the second adhesive layer.

[0008] In one embodiment, the quantum dot prism film includes a first substrate and a second substrate, wherein the quantum dot layer is disposed between the first substrate and the second substrate, and the first plurality of prisms are disposed on the first substrate.

[0009] In one embodiment, the gap between two adjacent prisms in the quantum dot prism film is 20-60 μm; the gap between two adjacent prisms in the first optical prism sheet is between 12-50 μm; and the gap between two adjacent prisms in the second optical prism sheet is between 29-58 μm.

[0010] In one embodiment, the thickness of the quantum dot layer is 60-350 μm.

[0011] In one embodiment, the thickness of the quantum dot prism film is 70-380 μm.

[0012] In one embodiment, a third adhesive layer is disposed on the quantum dot layer, and the first plurality of prisms are attached to the third adhesive layer.

[0013] The first optical prism film and the second optical prism film are each composed of a PET substrate, and the thickness of the PET substrate is 25-188um.

[0014] In one embodiment, the first optical prism film and the second optical prism film form an optical composite prism film, wherein the total thickness of the optical composite prism film is 70um-430um.

[0015] In one embodiment, the quantum dot layer includes a plurality of quantum dots and a plurality of diffused particles.

[0016] In one embodiment, the plurality of quantum dots are waterproof and oxygen-resistant.

[0017] In one embodiment, the present invention provides a quantum dot composite film, comprising: a quantum dot prism film including a quantum dot layer, a first substrate, a second substrate, and a first plurality of prisms, wherein the quantum dot layer is disposed between the first substrate and the second substrate, and wherein the first plurality of prisms are disposed on the first substrate; a first optical prism film including a second plurality of prisms located on a first side of the first optical prism film and a first adhesive layer disposed on a second side of the first optical prism film, wherein the first side and the second side of the first optical prism film are opposite sides of the first optical prism film; and a second optical prism film including a third plurality of prisms located on a first side of the second optical prism film and a second adhesive layer disposed on a second side of the second optical prism film, wherein the first side and the second side of the second optical prism film are opposite sides of the second optical prism film, wherein the tops of the first plurality of prisms are embedded in the first adhesive layer, and the tops of the second plurality of prisms are embedded in the second adhesive layer.

[0018] In one embodiment, the gap between two adjacent prisms in the quantum dot prism film is 20-60 μm; the gap between two adjacent prisms in the first optical prism sheet is between 12-50 μm; and the gap between two adjacent prisms in the second optical prism sheet is between 29-58 μm.

[0019] In one embodiment, the thickness of the quantum dot layer is 60-350 μm.

[0020] In one embodiment, the thickness of the quantum dot prism film is 70-380 μm.

[0021] In one embodiment, a third adhesive layer is disposed on the quantum dot layer, and the first plurality of prisms are attached to the third adhesive layer.

[0022] In one embodiment, the first optical prism film and the second optical prism film are each composed of a PET substrate, the thickness of which is 25-188 μm.

[0023] In one embodiment, the first optical prism film and the second optical prism film form an optical composite prism film, wherein the total thickness of the optical composite prism film is 70um-430um.

[0024] In one embodiment, the present invention provides a quantum dot composite film, comprising: a quantum dot layer including a quantum dot layer, a first substrate, and a second substrate, wherein the quantum dot layer is disposed between the first substrate and the second substrate; a first optical prism film including a first plurality of prisms located on a first side of the first optical prism film and a first adhesive layer disposed on a second side of the first optical prism film, wherein the first side and the second side of the first optical prism film are opposite sides of the first optical prism film; and a second optical prism film including a second plurality of prisms located on a first side of the second optical prism film and a second adhesive layer disposed on a second side of the second optical prism film, wherein the first side and the second side of the second optical prism film are opposite sides of the second optical prism film, wherein the upper surface of the first substrate is adhered to the first adhesive layer, and the tops of the first plurality of prisms are embedded in the second adhesive layer.

[0025] In one embodiment, the first optical prism film and the second optical prism film form an optical composite prism film, wherein the total thickness of the optical composite prism film is 70um-430um.

[0026] In one embodiment, the first optical prism film and the second optical prism film are each composed of a PET substrate, the thickness of which is 25-188 μm.

[0027] After referring to the following paragraphs and the accompanying drawings, which describe the embodiments and detailed techniques of the present invention, those skilled in the art will understand the technical features and implementation of the present invention. Attached Figure Description

[0028] The features and advantages of the present invention described above will be more fully understood by referring to the following detailed description and in conjunction with the drawings.

[0029] Figure 1 A cross-sectional schematic diagram of a quantum dot layer in one embodiment of the present invention is shown;

[0030] Figure 2 A cross-sectional schematic diagram of a quantum dot layer in one embodiment of the present invention is shown;

[0031] Figure 3 A schematic cross-sectional view of a quantum dot layer in one embodiment of the present invention is shown, wherein both the first and second main surfaces of the quantum dot layer have a structured surface.

[0032] Figure 4 A flowchart of a method for forming a quantum dot layer according to one embodiment of the present invention is shown;

[0033] Figure 5A The light brightness performance of a quantum dot layer in one embodiment of the present invention is shown;

[0034] Figure 5B The light brightness performance of a quantum dot layer in one embodiment of the present invention is shown;

[0035] Figure 6A This is a cross-sectional schematic diagram of a quantum dot composite film according to one embodiment of the present invention;

[0036] Figure 6B This is a cross-sectional schematic diagram illustrating a quantum dot composite film according to one embodiment of the present invention;

[0037] Figure 7A This is a cross-sectional schematic diagram of a quantum dot composite film according to an embodiment of the present invention;

[0038] Figure 7B This is a cross-sectional schematic diagram of a quantum dot composite film according to an embodiment of the present invention;

[0039] Figure 7C This is a cross-sectional schematic diagram of a quantum dot composite film according to an embodiment of the present invention;

[0040] Figure 7D This is a cross-sectional schematic diagram of a quantum dot composite film according to an embodiment of the present invention; and

[0041] Figure 8 This demonstrates the luminescence performance of the quantum dot composite film compared to the quantum dot layer.

[0042] Explanation of reference numerals in the attached figures: 100 - Quantum dot layer; 101A - Quantum dot; 102 - First PET layer; 103 - Second PET layer; 101B - Adhesive; 101A - Multiple quantum dots; 200 - Quantum dot layer; 201A - Quantum dot; 201B - Adhesive; 211 - First main surface; 212 - Second main surface; 213, 214 - Structured surfaces; 601 - Prism; 100 - Quantum dot layer; 101A - Quantum dot; 202 - First multiple prisms; 302 - Second multiple prisms; 301 - First adhesive layer; 402 - Third multiple prisms; 401 - Second adhesive layer; 102 - First substrate; 103 - Second substrate; 303 - Third substrate; 403 - Fourth substrate. Detailed Implementation

[0043] The invention will be described in detail below. The preferred embodiments described herein are for illustrative and descriptive purposes only and are not intended to limit the scope of the invention.

[0044] Figure 1 A schematic cross-sectional view of the quantum dot composite optical film of the present invention is shown, wherein the quantum dot layer 100 includes an adhesive 101B and a plurality of quantum dots 101A dispersed in the adhesive 101B, wherein a first PET (polyethylene terephthalate) layer 102 and a second PET layer 103 are respectively disposed on the top surface and the bottom surface of the quantum dot layer 100.

[0045] Figure 2 A schematic cross-sectional view of the quantum dot layer 200 of the present invention is shown. The quantum dot layer 200 includes an adhesive 201B and a plurality of quantum dots 201A dispersed in the adhesive 201B. The thickness of the quantum dot layer 200 can range from 25 μm to 350 μm. The quantum dots 201A exhibit high stability when exposed to high temperatures or high humidity, therefore the surface of the quantum dots 201A can be specially treated to improve its resistance to environmental damage caused by water and oxygen; thus, the quantum dots 201A can have sufficient water and oxygen resistance without the need for a barrier layer.

[0046] The quantum dot layer 200 is self-supporting without the need to form a support layer on each of the first main surface 211 and the second main surface 212 of the quantum dot layer 200. Therefore, the adhesive material should be selected as 201B of the quantum dot layer 200, such that the quantum dot layer 200 is self-supporting without the need to form a support layer on each of the first main surface 211 and the second main surface 212 of the quantum dots. Additionally, the material of the adhesive 201B of the quantum dot layer 200 should be selected to protect the quantum dots 201A in the quantum dot layer 200 from damage by oxygen or water. The material of the adhesive 201B may include at least one of the following: PET (polyethylene terephthalate), PEN (polyethylene naphthalate), PAR (polyacrylate), PC (polycarbonate), and TAC (cellulose triacetate). Preferably, the material is PET (polyethylene terephthalate). The material may be pure PET (polyethylene terephthalate). The material of adhesive 201B can be monolithic or homogeneous.

[0047] Quantum dot 201A may include green quantum dots and red quantum dots. The material of quantum dot 201A may include CdS, CdSe, CdTe, ZnSe, PbS, PbSe, InP, InAs, InGaP, ZnS, or ZnTe, but the invention is not limited thereto. The material of quantum dot 201A may include Cd (e.g., CdSe) or be Cd-free (e.g., InP). The concentration of quantum dot 201A may range from 0.1% to 20%, preferably from 0.3% to 8%.

[0048] In one embodiment, the quantum dot comprises Cd.

[0049] In one embodiment, the concentration of Cd in the quantum dots is 0.1-10%.

[0050] In one embodiment, the concentration of Cd in the quantum dots is 0.3-2%.

[0051] In one embodiment, the concentration of quantum dots in the quantum dot layer is 0.05-20%.

[0052] In one embodiment, the concentration of quantum dots in the quantum dot layer is 0.05-8%.

[0053] In one embodiment, the thickness of the quantum dot layer is 25-350 μm.

[0054] Optionally, the quantum dot layer 200 may include a plurality of diffused particles (not shown); the diffused particles are further provided to increase the uniformity of the quantum dots 201A dispersed in the binder 201B. The material of the diffused particles may be organic (e.g., PMMA (polymethyl methacrylate), PS (polystyrene), melamine) or inorganic (e.g., silicon, SiO2, TiO2, CaCO3, Al2O3, ZrO2). The concentration of the diffused particles may be in the range of 2% to 40%, preferably in the range of 5% to 15%.

[0055] Each of the first primary surface 211 and the second primary surface 212 of the quantum dot layer 200 may be a structured surface 213, 214 (see Figure 3 (Quantum dot layer 250 in the quantum dot layer). Structured surfaces 213, 214 can be used to reduce unwanted optical phenomena, such as Newton's rings. Matte structures can be used to form each of the first primary surface 211 and the second primary surface 212 of the quantum dot layer 200.

[0056] The following describes a manufacturing method for forming the quantum dot layer 200.

[0057] A method for forming a quantum dot layer 200 includes forming a quantum dot layer 200 comprising an adhesive 201B and a plurality of quantum dots 201A dispersed in the adhesive 201B. Forming the quantum dot layer 200 includes treating the quantum dots 201A and the material such that the plurality of quantum dots 201A are dispersed in the adhesive 201B. This process may be a co-extrusion process.

[0058] The adhesive 201B may include a first part and a second part, wherein the quantum dot 201A and the first part of the material are combined to form a first component, and the second part of the material is formed into a second component, wherein the first and second components are processed to disperse the quantum dot 201A in the adhesive 201B. This process may be a co-extrusion process.

[0059] For ease of explanation, in embodiment A1 of the present invention, the material of the adhesive 201B is PET; however, the present invention is not limited to this. After the quantum dots 201A are uniformly dispersed by a dispersion process, the quantum dots 201A and a first portion of PET can be combined to form a first component (e.g., by a twin-screw extruder or a micro-twin-screw extruder). The first component (i.e., QD in PET) can be in the form of multiple first fragments. The first component can have a high concentration of quantum dots 201A. The first component can have better luminescence effect and better luminescence uniformity. The second component can be made of pure PET or have a high concentration of PET. The second component (i.e., PET) can be in the form of multiple second fragments (i.e., PET fragments). The first component and the second component can be formed into the quantum dot layer 200 of the present invention based on their suitable mass ratio (e.g., by a co-extrusion process).

[0060] The first and second components can be combined into a composite mixture (e.g., via a twin-screw extruder or a micro-twin-screw extruder), wherein the composite mixture is processed such that quantum dots 201A are dispersed in binder 201B. This composite mixture can exhibit better luminescence and better luminescence uniformity. The process can be a co-extrusion process. The material of binder 201B can include a first part, a second part, and a third part, wherein quantum dots 201A and the first part of the material are combined to form a first component, forming a second part of the material. Then, the diffused particles and the third part of the material are combined to form a third component, wherein the first, second, and third components are treated to uniformly disperse quantum dots 201A in binder 201B. This process can be a co-extrusion process. The material of binder 201B can be PET; however, the invention is not limited to this. After uniformly dispersing the diffused particles through a dispersion process, the diffused particles and the third part of the PET can be combined to form a third component (e.g., via a twin-screw extruder or a micro-twin-screw extruder). The third component (i.e., the diffused particles in the PET) can be in the form of multiple third fragments. The third component can have a high concentration of diffusing particles. Based on their suitable mass ratio (e.g., by co-extrusion), the first, second, and third components can be formed into a quantum dot layer 200 in this invention. The first, second, and third components are incorporated into a composite mixture (e.g., by a twin-screw extruder or a micro-twin-screw extruder), wherein the composite mixture is treated to uniformly disperse the quantum dots 201A in the binder 201B. This composite mixture can have better luminescence effect and better luminescence uniformity. This process can be a co-extrusion process.

[0061] Quantum dot 201A may include green quantum dots and red quantum dots. Green quantum dots and a portion of PET may be combined to form a first component (e.g., via a twin-screw extruder or a micro-twin-screw extruder). Red quantum dots and another portion of PET may be combined to form a second component (e.g., via a twin-screw extruder or a micro-twin-screw extruder). This process may be a co-extrusion process, which is one of the stretch forming techniques used for film formation. The stretch forming technique may be a biaxial stretch forming technique. Co-extrusion is a process of extruding and combining two or more plastic materials, each having a property Xi, to form a structure having a combination of properties X1, X2, ..., XN (N is an integer greater than 1). When a co-extrusion process is performed in Example A1 using two plastic materials, one plastic material may be the first component and the other plastic material may be the second component.

[0062] The material of the diffusion particles can be PMMA; however, the invention is not limited to this. PET fragments are placed in an oven and dried at 100°C for 24 hours. PMMA beads are placed in an oven and dried at 100°C for 24 hours. A first mixture containing green quantum dots and PET fragments is prepared. The mass of the green quantum dots is 8 g, and the mass of the PET fragments is 72 g. The first mixture is pre-homogenized and then fed into a twin-screw extruder (or a micro-twin-screw extruder or micro-extruder). The first mixture is subjected to a thermal dispersion (or nano-dispersion) process at 280°C (under high shear force) for 10 minutes in the twin-screw extruder to form the first component (i.e., GQD in PET).

[0063] The first component can have a high concentration of green quantum dots. A second mixture containing red quantum dots and PET fragments is prepared. The mass of the red quantum dots is 20g, and the mass of the PET fragments is 72g. The second mixture is pre-homogenized and then fed into a twin-screw extruder (or a micro-twin-screw extruder or micro-extruder). The second mixture is subjected to a thermal dispersion (or nano-dispersion) process (by high shear force) at 280°C in the twin-screw extruder for 10 minutes to form the second component (i.e., RQD in PET). The second component can have a high concentration of red quantum dots.

[0064] Prepare a third mixture containing PMMA beads and PET fragments. The mass of the PMMA beads is 32g, and the mass of the PET fragments is 48g. Pre-homogenize the third mixture, then feed it into a twin-screw extruder (or a micro-twin-screw extruder or micro-extruder). Perform a thermal dispersion (or nano-dispersion) process on the third mixture in the twin-screw extruder (under high shear force) at 280°C for 10 minutes to form the third component (i.e., PMMA in PET). Prepare a fourth mixture containing a first component (i.e., GQD in PET), a second component (i.e., RQD in PET), a third component (i.e., PMMA in PET), and a second component (i.e., PET fragments). The mass of the first component is 13g, the mass of the second component is 6g, the mass of the third component is 16g, and the mass of the fourth component is 30g. Feed the fourth mixture into a twin-screw extruder (or a micro-twin-screw extruder or micro-extruder).

[0065] The fourth mixture is thermally or nano-dispersed in a twin-screw extruder to form a composite mixture, which is then formed into a quantum dot layer by a hot plate.

[0066] In one embodiment, multiple quantum dots are dispersed into the space between PET particles using a micro twin-screw extruder nanodispersion process.

[0067] In one embodiment, PET co-extrusion and biaxial stretching techniques are used to form the PET quantum dot optical film. The PET quantum dot optical film does not require an additional gas barrier film and can still achieve the same level of environmental resistance testing.

[0068] Figure 4 A method for forming a quantum dot layer is shown, wherein in step S401, a plurality of quantum dots are treated to make the plurality of quantum dots water-resistant and oxygen-resistant. In step S402, a quantum dot layer comprising an adhesive and a plurality of quantum dots dispersed in the adhesive is formed, wherein the plurality of quantum dots are water-resistant and oxygen-resistant.

[0069] Figures 5A to 5B The photoluminescence properties of the quantum dot layer 200 of this invention are shown. The quantum dot layer 200 of this invention (see [link to original text]). Figure 2 Compared to quantum dot layers 100 in the prior art (see...) Figure 1 Its photoluminescence properties are much better.

[0070] Figure 6AA schematic cross-sectional view of the quantum dot composite optical film 600A of the present invention is shown, wherein the quantum dot layer 100 includes an adhesive 101B and a plurality of quantum dots 101A dispersed in the adhesive 101B, wherein a first PET is provided with a 102 and a PET layer 103 on the top surface and bottom surface of the quantum dot layer 100, respectively, wherein a plurality of prisms 601 are provided on the PET 102 or the PET 103.

[0071] Figure 6B A schematic cross-sectional view of the quantum dot composite optical film 600B of the present invention is shown, wherein the quantum dot layer 200 includes an adhesive 201B and a plurality of quantum dots 201A dispersed in the adhesive 201B. The thickness of the quantum dot layer 200 can be in the range of 25 μm to 350 μm, wherein a plurality of prisms 601 are disposed above the quantum dot layer 200. The quantum dots 201A have high stability when exposed to high temperatures or high humidity, therefore the surface of the quantum dots 201A can be specially treated to improve its ability to resist environmental damage caused by water and oxygen; therefore, the quantum dots 201A can have sufficient water resistance and oxidation resistance without the need for a barrier layer.

[0072] In one embodiment, the plurality of prisms include a photocurable material.

[0073] In one embodiment, the plurality of prisms comprise a thermosetting material.

[0074] In one embodiment, the quantum dot layer further includes a plurality of diffused particles.

[0075] In one embodiment, the quantum dot comprises Cd.

[0076] In one embodiment, the concentration of quantum dots in the quantum dot layer is 0.05-20%.

[0077] In one embodiment, the concentration of quantum dots in the quantum dot layer is 0.05-8%.

[0078] In one embodiment, the adhesive comprises at least one of the following: PET (polyethylene terephthalate), PEN (polyethylene naphthalate), PAR (polyacrylate), PC (polycarbonate), and TAC (cellulose triacetate).

[0079] In one embodiment, an adhesive layer is disposed on the quantum dot layer, wherein a plurality of prisms are adhered to the adhesive layer.

[0080] In one embodiment, a quantum dot composite optical film is provided, wherein the quantum dot composite optical film includes a plurality of quantum dots dispersed in the optical film, wherein the plurality of quantum dots can be a water-oxygen resistant optical brightening layer disposed above the quantum dot layer.

[0081] Figure 7A This is a cross-sectional schematic diagram of a quantum dot composite film of the present invention. The quantum dot composite film includes: a quantum dot layer 100 and a first plurality of prisms 202 disposed on the quantum dot layer 100; a first optical prism film including a second plurality of prisms 302 located on a first side of the first optical prism film and a first adhesive layer 301 disposed on a second side of the first optical prism film, wherein the first side and the second side of the first optical prism film are opposite sides of the first optical prism film; and a second optical prism film including a third plurality of prisms 402 located on a first side of the second optical prism film and a second adhesive layer 401 disposed on a second side of the second optical prism film, wherein the first side and the second side of the second optical prism film are opposite sides of the second optical prism film, wherein the top of the first plurality of prisms 202 is embedded in the first adhesive layer 301, and the top of the second plurality of prisms 302 is embedded in the second adhesive layer 401.

[0082] In one embodiment, the quantum dot layer 100 includes an adhesive and a plurality of quantum dots 101A dispersed in the adhesive, wherein the plurality of quantum dots 101A are waterproof and antioxidant.

[0083] In one embodiment, such as Figure 7B As shown, a quantum dot layer 101 is disposed between a first substrate 102 and a second substrate 103, wherein a first plurality of prisms 202 are disposed on the first substrate 102.

[0084] In one embodiment, such as Figure 7B As shown, the first optical prism film includes a third substrate 303, wherein a second plurality of prisms 302 are disposed on the third substrate 303.

[0085] In one embodiment, the third substrate 303 is integrally formed with the second plurality of prisms 302.

[0086] In one embodiment, such as Figure 7B As shown, the third substrate 303 is made of PET and its thickness is between 25-188um.

[0087] In one embodiment, such as Figure 7B As shown, the second optical prism film includes a fourth substrate 403, wherein a third plurality of prisms 402 are disposed on the fourth substrate 403.

[0088] In one embodiment, the fourth substrate 403 is integrally formed with the third plurality of prisms 402.

[0089] In one embodiment, such as Figure 7BAs shown, the fourth substrate 403 is made of PET and its thickness is between 25-188um.

[0090] In one embodiment, the quantum dot composite film has a higher brightness than a single quantum dot layer, with a brightness value at least twice that of a single quantum dot layer.

[0091] In one embodiment, the quantum dot composite film is used in a backlight module.

[0092] In one embodiment, the gap between every two adjacent prisms of the first optical prism film is between 12 and 50 μm, and the gap between every two adjacent prisms of the second optical prism film is between 29 and 58 μm.

[0093] In one embodiment, the gap between any two adjacent prisms in the quantum dot prism film is between 20 and 60 μm; the gap between any two adjacent prisms in the first optical prism sheet is between 12 and 50 μm; and the gap between any two adjacent prisms in the second optical prism sheet is between 29 and 58 μm.

[0094] In one embodiment, the first optical prism film is made of a PET substrate with a thickness of 25-188 μm.

[0095] In one embodiment, the second optical prism film is made of a PET substrate with a thickness of 25-188 μm.

[0096] In one embodiment, the total thickness of the optical composite prism film is 70-430 μm.

[0097] In one embodiment, the quantum dot layer 101 comprises a plurality of quantum dots with a spacing of 20-60 μm and a thickness of 60-350 μm.

[0098] In one embodiment, the total thickness of the quantum dot prism film is 70-380 μm.

[0099] Figure 7CThis is a cross-sectional schematic diagram of a quantum dot composite film according to the present invention. The quantum dot composite film includes: a quantum dot layer 100 containing a plurality of quantum dots 101A, a first substrate 102, a second substrate 103, and a first plurality of prisms 102, wherein the quantum dot layer 100 is disposed between the first substrate 102 and the second substrate 103, and the first plurality of prisms 102 are disposed on the first substrate 10; a first optical prism film, including a second plurality of prisms 302 located on a first side of the first optical prism film and a first adhesive layer 301 disposed on a second side of the first optical prism film, wherein the first optical prisms The first side of the membrane and the second side of the first optical prism membrane are opposite sides of the first optical prism membrane; and a second optical prism membrane, including a third plurality of prisms 402 located on a first side of the second optical prism membrane and a second adhesive layer 401 disposed on a second side of the second optical prism membrane, wherein the first side of the second optical prism membrane and the second side of the second optical prism membrane are opposite sides of the second optical prism membrane, wherein the top of the first plurality of prisms 202 is embedded in the first adhesive layer 301, and the top of the second plurality of prisms 302 is embedded in the second adhesive layer 401.

[0100] In one embodiment, the quantum dot layer includes an adhesive and a plurality of quantum dots 101A dispersed in the adhesive, wherein the plurality of quantum dots 101A are waterproof and antioxidant.

[0101] In one embodiment, such as Figure 7C As shown, the first optical prism film includes a third substrate 303, wherein a second plurality of prisms 302 are disposed on the third substrate 303.

[0102] In one embodiment, the third substrate 303 is integrally formed with the second plurality of prisms 302.

[0103] In one embodiment, such as Figure 7C As shown, the third substrate 303 is made of PET and its thickness is between 25-188um.

[0104] In one embodiment, such as Figure 7C As shown, the second optical prism film includes a fourth substrate 403, wherein a third plurality of prisms 402 are disposed on the fourth substrate 403.

[0105] In one embodiment, the fourth substrate 403 is integrally formed with the third plurality of prisms 402.

[0106] In one embodiment, such as Figure 7C As shown, the fourth substrate 403 is made of PET and its thickness is between 25-188um.

[0107] In one embodiment, the quantum dot composite film has a higher brightness than a single quantum dot layer, with a brightness value at least twice that of a single quantum dot layer.

[0108] In one embodiment, the quantum dot composite film is used in the backlight module.

[0109] In one embodiment, the gap between every two adjacent prisms of the first optical prism film is between 12 and 50 μm, and the gap between every two adjacent prisms of the second optical prism film is between 29 and 58 μm.

[0110] In one embodiment, the first optical prism film is made of a PET substrate with a thickness between 25-188 μm.

[0111] In one embodiment, the second optical prism film is made of a PET substrate with a thickness between 25-188 μm.

[0112] In one embodiment, the total thickness of the optical composite prism sheet is between 70 μm and 430 μm.

[0113] Figure 7D This is a cross-sectional schematic diagram of the quantum dot composite film of the present invention. The quantum dot composite film includes: a quantum dot layer 100; a first optical prism film, including a first plurality of prisms 302 located on a first side of the first optical prism film and a first adhesive layer 301 disposed on a second side of the first optical prism film, wherein the first side and the second side of the first optical prism film are opposite sides of the first optical prism film; and a second optical prism film 402, including a second plurality of prisms located on a first side of the second optical prism film and a second adhesive layer 401 disposed on a second side of the second optical prism film, wherein the first side and the second side of the second optical prism film are opposite sides of the second optical prism film, wherein the upper surface of the quantum dot layer 100 is adhered to the first adhesive layer 301, and the tops of the first plurality of prisms 302 are embedded in the second adhesive layer 401.

[0114] In one embodiment, the quantum dot layer includes an adhesive and a plurality of quantum dots 101A dispersed in the adhesive, wherein the plurality of quantum dots 101A are waterproof and antioxidant.

[0115] In one embodiment, such as Figure 7D As shown, the first optical prism film includes a third substrate 303, wherein a second plurality of prisms 302 are disposed on the third substrate 303.

[0116] In one embodiment, the third substrate 303 is integrally formed with the second plurality of prisms 302.

[0117] In one embodiment, such as Figure 7D As shown, the third substrate 303 is made of PET and its thickness is between 25-188um.

[0118] In one embodiment, such as Figure 7D As shown, the second optical prism film includes a fourth substrate 403, wherein a third plurality of prisms 402 are disposed on the fourth substrate 403.

[0119] In one embodiment, the fourth substrate 403 is integrally formed with the third plurality of prisms 402.

[0120] In one embodiment, such as Figure 7D As shown, the fourth substrate 403 is made of PET and its thickness is between 25-188um.

[0121] In one embodiment, the quantum dot composite film has a higher brightness than a single quantum dot layer, with a brightness value at least twice that of a single quantum dot layer.

[0122] In one embodiment, the quantum dot composite film is used in the backlight module.

[0123] In one embodiment, the gap between every two adjacent prisms of the first optical prism film is between 12 and 50 μm, and the gap between every two adjacent prisms of the second optical prism film is between 29 and 58 μm.

[0124] In one embodiment, the first optical prism film is made of a PET substrate with a thickness between 25-188 μm.

[0125] In one embodiment, the second optical prism film is made of a PET substrate with a thickness between 25-188 μm.

[0126] In one embodiment, the total thickness of the optical composite prism film is between 70 μm and 430 μm.

[0127] In one embodiment, the quantum dot layer 101 comprises a plurality of quantum dots with a spacing between 20-60 μm and a thickness between 60-350 μm.

[0128] In one embodiment, the total thickness of the quantum dot layer is between 70 and 380 μm.

[0129] Figure 8 A comparison of the brightness performance of a quantum dot composite film and a quantum dot layer 100 alone is shown, wherein the brightness of the quantum dot composite film is at least twice that of the quantum dot layer 100 alone, where, corresponding to Figure 7A and Figure 7BThe brightness of Case 4 is 293.0% compared to 100.0% of the brightness of a traditional QD film, corresponding to... Figure 7C The brightness of Case 2 is 267.5 compared to the brightness of 100.0% of the conventional QD film.

[0130] While the present invention has been provided above with reference to the preferred embodiments described above, it is not intended to limit the invention. Those skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention. Although not all possible modifications and substitutions have been provided in the foregoing description, the appended patent protection scope substantially covers all such variations.

Claims

1. A quantum dot composite film, characterized in that, include: A quantum dot prism film includes a quantum dot layer and a first plurality of prisms disposed on the quantum dot layer; A first optical prism film includes a second plurality of prisms located on a first side of the first optical prism film and a first adhesive layer disposed on a second side of the first optical prism film, wherein the first side of the first optical prism film and the second side of the first optical prism film are opposite sides of the first optical prism film. as well as A second optical prism film includes a third plurality of prisms located on a first side of the second optical prism film and a second adhesive layer disposed on a second side of the second optical prism film, wherein the first side and the second side of the second optical prism film are opposite sides of the second optical prism film, wherein the tops of the first plurality of prisms are embedded in the first adhesive layer, and the tops of the second plurality of prisms are embedded in the second adhesive layer, wherein the total thickness of the quantum dot prism film is 70-380 μm, wherein the gap between two adjacent prisms in the quantum dot prism film is 20-60 μm; the gap between two adjacent prisms in the first optical prism sheet is between 12-50 μm; and the gap between two adjacent prisms in the second optical prism sheet is between 29-58 μm.

2. The quantum dot composite film according to claim 1, characterized in that, The quantum dot prism film includes a first substrate and a second substrate, wherein the quantum dot layer is disposed between the first substrate and the second substrate, and the first plurality of prisms are disposed on the first substrate.

3. The quantum dot composite film according to claim 1, characterized in that, The thickness of the quantum dot layer is 60-350 μm.

4. The quantum dot composite film according to claim 1, characterized in that, The thickness of the quantum dot prism film is 70-380 μm.

5. The quantum dot composite film according to claim 1, characterized in that, A third adhesive layer is disposed on the quantum dot layer, and the first plurality of prisms are attached to the third adhesive layer.

6. The quantum dot composite film according to claim 1, characterized in that, The first optical prism film and the second optical prism film are each composed of a PET substrate, and the thickness of the PET substrate is 25-188um.

7. The quantum dot composite film according to claim 1, characterized in that, The first optical prism film and the second optical prism film form an optical composite prism film, wherein the total thickness of the optical composite prism film is 70um-430um.

8. The quantum dot composite film according to claim 1, characterized in that, The quantum dot layer comprises multiple quantum dots and multiple diffused particles.

9. The quantum dot composite film according to claim 8, characterized in that, The quantum dots are waterproof and oxygen-resistant.

10. A quantum dot composite film, characterized in that, include: A quantum dot prism film includes a quantum dot layer, a first substrate, a second substrate, and a first plurality of prisms, wherein the quantum dot layer is disposed between the first substrate and the second substrate, and wherein the first plurality of prisms are disposed on the first substrate. A first optical prism film includes a second plurality of prisms located on a first side of the first optical prism film and a first adhesive layer disposed on a second side of the first optical prism film, wherein the first side of the first optical prism film and the second side of the first optical prism film are opposite sides of the first optical prism film. as well as A second optical prism film includes a third plurality of prisms located on a first side of the second optical prism film and a second adhesive layer disposed on a second side of the second optical prism film, wherein the first side and the second side of the second optical prism film are opposite sides of the second optical prism film, wherein the tops of the first plurality of prisms are embedded in the first adhesive layer, and the tops of the second plurality of prisms are embedded in the second adhesive layer, wherein the total thickness of the quantum dot prism film is 70-380 μm, wherein the gap between two adjacent prisms in the quantum dot prism film is 20-60 μm; the gap between two adjacent prisms in the first optical prism sheet is between 12-50 μm; and the gap between two adjacent prisms in the second optical prism sheet is between 29-58 μm.

11. The quantum dot composite film according to claim 10, characterized in that, The thickness of the quantum dot layer is 60-350 μm.

12. The quantum dot composite film according to claim 10, characterized in that, The thickness of the quantum dot prism film is 70-380 μm.

13. The quantum dot composite film according to claim 10, characterized in that, A third adhesive layer is disposed on the quantum dot layer, and the first plurality of prisms are attached to the third adhesive layer.

14. The quantum dot composite film according to claim 10, characterized in that, The first optical prism film and the second optical prism film are each composed of a PET substrate, and the thickness of the PET substrate is 25-188um.

15. The quantum dot composite film according to claim 10, characterized in that, The first optical prism film and the second optical prism film form an optical composite prism film, wherein the total thickness of the optical composite prism film is 70um-430um.

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