Quantum dot film

Abstract

The utility model discloses a quantum dot film, which relates to the technical field of optical film materials, is used for converting blue light into white light, and comprises a first quantum dot layer and a second quantum dot layer arranged below the first quantum dot layer. The first quantum dot layer and the second quantum dot layer are attached through UV optical cement; the top surface of the first quantum dot layer and the top surface of the second quantum dot layer are each provided with a sawtooth-shaped structure, and the long axis direction of a single sawtooth of the first quantum dot layer is perpendicular to the long axis direction of a single sawtooth of the second quantum dot layer. According to the scheme, the effect of improving the display brightness and the color gamut can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of optical films, in particular to a quantum dot film. Background Art

[0002] Quantum dot films are a new type of optical material widely used in devices such as displays and TVs to improve color performance and energy efficiency. Most of the quantum dot films on the market are mainly coating types. Coating-type quantum dot films usually only form a single planar film sheet. This single form limits their flexibility in different application scenarios and cannot be diversely designed according to different requirements. To protect the performance of quantum dot films, especially to prevent moisture intrusion, PET films usually need to be pasted on both the upper and lower surfaces of coating-type quantum dot films. The additional PET films increase the material cost and make the manufacturing process more cumbersome. Since the brightness and color gamut of quantum dot films cannot meet more requirements, in a display, there are usually multiple film sheets such as polarizing films, brightness enhancement films, and quantum dot films. The manufacturing and installation of each film sheet require precise control, resulting in increased complexity of the assembly process. Summary of the Utility Model

[0003] To solve the deficiencies of the prior art, the utility model provides a quantum dot film with optical microstructures arranged on the surface of the quantum dot film to enhance brightness and color gamut.

[0004] To achieve the purpose of the utility model, the following scheme is proposed:

[0005] A quantum dot film for converting blue light into white light, comprising a first quantum dot layer and a second quantum dot layer arranged below it.

[0006] The first quantum dot layer and the second quantum dot layer are adhered together through UV optical glue;

[0007] Sawtooth structures are arranged on the top surfaces of both the first quantum dot layer and the second quantum dot layer. The long axis direction of a single sawtooth of the first quantum dot layer is perpendicular to the long axis direction of a single sawtooth of the second quantum dot layer.

[0008] Further, it is arranged in a Mini LED display or a backlight module.

[0009] Further, the long axis direction of a single sawtooth of the first quantum dot layer is parallel to two of the sides of the first quantum dot layer and perpendicular to the other two sides.

[0010] Further, the long axis direction of a single sawtooth of the second quantum dot layer is parallel to two of the sides of the second quantum dot layer and perpendicular to the other two sides.

[0011] Further, the longitudinal section of a single sawtooth of the first quantum dot layer / second quantum dot layer is triangular, and the base of the triangle is 50 μm and the height is 25 μm.

[0012] Further, the triangle is an isosceles triangle.

[0013] Further, the first quantum dot layer and the second quantum dot layer contain different types of quantum dots respectively. The first quantum dot layer and the serrated structure on its top surface contain the same type of quantum dots, and the second quantum dot layer and the serrated structure on its top surface contain the same type of quantum dots.

[0014] Further, the first quantum dot layer and the serrated structure on its top surface contain green quantum dots, and the second quantum dot layer and the serrated structure on its top surface contain red quantum dots.

[0015] Further, a diffusing agent is contained in the quantum dot film.

[0016] The beneficial effects of the present utility model are as follows: The quantum dot film is a composite film that takes into account diffusion, brightness enhancement, and high color gamut. The quantum dot film is composed of two layers of different types of quantum dot layers. Each quantum dot layer surface has an optical microstructure with a brightness enhancement effect, that is, a serrated structure. The two quantum dot layers are bonded through a UV optical adhesive bonding technology, and the serrated structures of the two layers are perpendicular to each other, so as to achieve the effect of improving the display brightness and color gamut. Description of the Drawings

[0017] Figure 1 Shows the structure diagram of the quantum dot film;

[0018] Figure 2 Shows the front view of the quantum dot film;

[0019] Figure 3 Shows the left view of the quantum dot film;

[0020] Figure 4 Shows the result diagram of the reliability test of the quantum dot film. Detailed Embodiments

[0021] As Figures 1-3 shown, this embodiment provides a quantum dot film, which can be applied to a Mini LED display or a backlight module. The quantum dot film includes two layers, namely a first quantum dot layer 1 and a second quantum dot layer 2.

[0022] The second quantum dot layer 2 is arranged below the first quantum dot layer 1. The first quantum dot layer 1 and the second quantum dot layer 2 are bonded through a UV optical adhesive. The UV optical adhesive bonding technology belongs to the prior art and will not be elaborated in detail here.

[0023] Both the top surfaces of the first quantum dot layer 1 and the second quantum dot layer 2 are provided with serrated structures 3, which are formed by engraving microstructures on a roller and then on-line rolling and transferring on an extruder. The long axis direction of a single serration of the first quantum dot layer 1 is perpendicular to the long axis direction of a single serration of the second quantum dot layer 2. The mutually perpendicular serrated structures 3 of the two layers can converge and aggregate the light in the left-right and up-down directions. Through the two convergence and aggregation effects, an effect of increasing the brightness by 90% can be achieved.

[0024] More specifically, in the downward projection area, the serrated structure 3 on the top surface of the first quantum dot layer 1 completely covers the first quantum dot layer 1, and the serrated structure 3 on the top surface of the second quantum dot layer 2 completely covers the second quantum dot layer 2.

[0025] More specifically, both the first quantum dot layer 1 and the second quantum dot layer 2 are quadrilateral. The long axis direction of a single serration of the first quantum dot layer 1 is parallel to two of the sides of the first quantum dot layer 1 and perpendicular to the other two sides. The long axis direction of a single serration of the second quantum dot layer 2 is parallel to two of the sides of the second quantum dot layer 2 and perpendicular to the other two sides.

[0026] More specifically, the longitudinal section of a single serration of the first quantum dot layer 1 / second quantum dot layer 2 is an isosceles triangle, and the base of the isosceles triangle is 50 μm and the height is 25 μm.

[0027] More specifically, the first quantum dot layer 1 and the serrated structure 3 on its top surface contain green quantum dots, and the second quantum dot layer 2 and the serrated structure 3 on its top surface contain red quantum dots.

[0028] Blue light passing through the quantum dot film can convert blue light into white light. After blue light enters the quantum dot film, it will first excite the green quantum dots, and the remaining blue light wavelength after exciting the green quantum dots will excite the red quantum dots. Therefore, by laminating the quantum dot film, the refraction of blue light in the monochromatic quantum dot film can reduce the loss of blue light wavelength. At the same time, a diffusing agent will be added to the quantum dot film to make the light evenly disperse after entering the film and promote the light propagation.

[0029] The quantum dot film provided in this embodiment has the effects of resisting blue light, high temperature and water vapor. After 1000 hours of reliability test, the quantum dot film has not failed, and the results are as Figure 4 shown.

[0030] The above embodiments are only used to illustrate the technical ideas and characteristics of the present invention, and do not represent the only or limit the present invention. Those skilled in the art should understand that without departing from the scope of the present invention, various changes or equivalent substitutions made to the present invention all belong to the scope of protection of the present invention.

Claims

1. A quantum dot film, characterized in that: Used for converting blue light into white light, comprising a first quantum dot layer (1) and a second quantum dot layer (2) arranged thereunder; The first quantum dot layer (1) and the second quantum dot layer (2) are bonded together using UV optical adhesive; The top surfaces of the first quantum dot layer (1) and the second quantum dot layer (2) are both provided with sawtooth structures (3), and the long axis direction of a single sawtooth of the first quantum dot layer (1) is perpendicular to the long axis direction of a single sawtooth of the second quantum dot layer (2).

2. The quantum dot film according to claim 1, characterized in that: Installed in Mini LED display or backlight module.

3. The quantum dot film according to claim 1, characterized in that: The long axis direction of a single sawtooth of the first quantum dot layer (1) is parallel to two sides of the first quantum dot layer (1) and perpendicular to the other two sides.

4. The quantum dot film according to claim 1, characterized in that: The long axis direction of a single sawtooth of the second quantum dot layer (2) is parallel to two sides of the second quantum dot layer (2) and perpendicular to the other two sides.

5. The quantum dot film according to claim 1, characterized in that: A single sawtooth longitudinal section of the first quantum dot layer (1) / the second quantum dot layer (2) is a triangle, wherein the base of the triangle is 50 μm and the height is 25 μm.

6. The quantum dot film according to claim 5, characterized in that: The triangle is an isosceles triangle.

7. The quantum dot film according to claim 1, characterized in that: The first quantum dot layer (1) and the second quantum dot layer (2) respectively contain quantum dots of different types; the first quantum dot layer (1) and the sawtooth structure (3) on its top surface contain quantum dots of the same type; and the second quantum dot layer (2) and the sawtooth structure (3) on its top surface contain quantum dots of the same type.

8. The quantum dot film according to claim 1, characterized in that: The first quantum dot layer (1) and the sawtooth structure (3) on its top surface contain green quantum dots, and the second quantum dot layer (2) and the sawtooth structure (3) on its top surface contain red quantum dots.

9. The quantum dot film according to claim 1, characterized in that: The quantum dot film contains a diffusant.

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