TW202242504A - Backlight module and display device - Google Patents

Abstract

A backlight module including a light source assembly, a light guide element, a red light conversion layer and a green light conversion layer is provided. The light guide element, the red and green light conversion layers are configured in the transmission path of a light beam provided by the light source assembly. The red and green light conversion layers respectively include a plurality of red and green light conversion units, and each of the plurality of red and green light conversion units includes red and green light quantum dots, first and second protective layers, and a plurality of first and second hydrophobic ends. The first and second protective layers respectively cover the red and green light quantum dots. Wherein, the thickness of the first protective layer is greater than the diameter of the red light quantum dots, and the thickness of the second protective layer is greater than the diameter of the green light quantum dots.

Description

Backlight module and display device

The present invention relates to an optical module and a display device, and in particular to a backlight module and a display device including the backlight module.

Since the liquid crystal itself does not have the ability to emit light, the display panel must rely on the backlight module to provide a backlight to display images. Early backlights were cold cathode fluorescent lamps (Cold Cathode Fluorescent Lamp, CCFL), which usually can only display about 70% of the color quality of the NTSC (National Television System Committee) standard color gamut. After changing to a white light-emitting diode as a backlight source, the improvement in the color part is also limited.

In the current trend, improving the color quality of the backlight is one of the goals of strengthening the liquid crystal display technology, and the quantum dot technology just meets the basic concept of this requirement. In detail, the quantum dot technology utilizes blue light-emitting diode light sources to irradiate green quantum dots and red quantum dots with different diameters to respectively excite red light and green light to achieve the red light, green light and blue light required for full-color display. primary colors. In addition, it decomposes light with high efficiency, thereby achieving high chromaticity reproducibility, greatly improving its color gamut, and making the colors of liquid crystal display more vivid.

In the existing technical framework, the quantum dot films of major manufacturers in various countries adopt a sandwich-style multi-layer composite structure, for example, two upper and lower barrier films (Barrier film) are used to protect the quantum dots. Dots are mixed with glue in a certain proportion to obtain a quantum dot coating glue. Then apply the glue between the two barrier films through the coating equipment. When the blue LED irradiates the quantum dot particles in the quantum dot film, it will form a surface luminous body color film, and finally pass through the imaging system such as the filter and the driving system to form an image.

The "Prior Art" paragraph is only used to help understand the content of the present invention, so the content disclosed in the "Prior Art" paragraph may contain some conventional technologies that do not constitute the knowledge of those with ordinary skill in the art. The content disclosed in the "Prior Art" paragraph does not mean that the content or the problems to be solved by one or more embodiments of the present invention have been known or recognized by those with ordinary knowledge in the technical field before the application of the present invention.

The invention provides a backlight module and a display device, which can avoid edge failure of the quantum dot conversion layer, simplify the manufacturing process, save cost, reduce thickness and improve heat dissipation effect.

Other purposes and advantages of the present invention can be further understood from the technical features disclosed in the present invention.

To achieve one or part or all of the above objectives or other objectives, the present invention provides a backlight module, including a light source assembly, a light guide element, a red light conversion layer and a green light conversion layer. The light source component is used for providing light beams. The light guide element is arranged on the transmission path of the light beam. The light source assembly is arranged on the side of the light guide element. The red light conversion layer is arranged on the transmission path of the light beam. The red light conversion layer includes a plurality of red light conversion units, and each of the plurality of red light conversion units includes red light quantum dots, a first protective layer and a plurality of first hydrophobic ends. The first protective layer covers the red light quantum dots. A plurality of first hydrophobic ends are arranged on the outer surface of the first protection layer. The green light conversion layer is arranged on the transmission path of the light beam. The green light conversion layer includes a plurality of green light conversion units, and each of the plurality of green light conversion units includes green light quantum dots, a second protective layer and a plurality of second hydrophobic ends. The second protective layer covers the green light quantum dots. A plurality of second hydrophobic ends are arranged on the outer surface of the second protection layer. Wherein, the thickness of the first protection layer is greater than the diameter of the red light quantum dots, and the thickness of the second protection layer is greater than the diameter of the green light quantum dots.

In an embodiment of the present invention, the diameters of each of the above-mentioned red light conversion units and each of the green light conversion units are larger than 15 nm.

In an embodiment of the present invention, the above-mentioned first protection layer includes silicon oxide, cadmium sulfide or zinc selenide, and the second protection layer includes silicon oxide, cadmium sulfide or zinc selenide.

In an embodiment of the present invention, the plurality of first hydrophobic ends include polysilane polymer hydrophobic functional groups, and the plurality of second hydrophobic ends include polysilane polymer hydrophobic functional groups.

In an embodiment of the present invention, the above-mentioned red light conversion layer includes a first colloid, and a plurality of red light conversion units are distributed on the first colloid. The green light conversion layer includes a second colloid, and a plurality of green light conversion units are distributed on the second colloid.

In an embodiment of the present invention, the above-mentioned first colloid includes epoxy silicon, silicon rubber or acrylic, and the second colloid includes epoxy silicon, silicon rubber or acrylic.

In an embodiment of the present invention, the above-mentioned red light conversion layer further includes a plurality of first diffusion particles distributed in the first colloid. The green light conversion layer also includes a plurality of second diffusion particles distributed in the second colloid.

In an embodiment of the present invention, neither the above-mentioned surface of the red light conversion layer nor the surface of the green light conversion layer has a barrier film.

In an embodiment of the present invention, there is an interval between the above-mentioned red light conversion layer and the green light conversion layer.

In an embodiment of the present invention, at least one of the above-mentioned red light conversion layer and the green light conversion layer is a patterned layer distributed in dots.

In an embodiment of the present invention, one of the above-mentioned red light conversion layer and the green light conversion layer is disposed on one of the top surface and the bottom surface of the light guide element. The other one of the red light conversion layer and the green light conversion layer is disposed on the other one of the top surface and the bottom surface of the light guide element.

In an embodiment of the present invention, the above-mentioned backlight module further includes a reflective layer located on one side of the bottom surface of the light guide element, wherein the red light conversion layer and the green light conversion layer are patterned dotted on the reflective layer Floor.

To achieve one or part or all of the above objectives or other objectives, the present invention further provides a display device, including a backlight module and a display module. The backlight module includes a light source component, a light guide element, a red light conversion layer and a green light conversion layer. The light source component is used for providing light beams. The light guide element is arranged on the transmission path of the light beam. The light source assembly is arranged on the side of the light guide element. The red light conversion layer is arranged on the transmission path of the light beam. The red light conversion layer includes a plurality of red light conversion units, and each of the plurality of red light conversion units includes red light quantum dots, a first protective layer and a plurality of first hydrophobic ends. The first protective layer covers the red light quantum dots. A plurality of first hydrophobic ends are arranged on the outer surface of the first protective layer. The green light conversion layer is arranged on the transmission path of the light beam. The green light conversion layer includes a plurality of green light conversion units, and each of the plurality of green light conversion units includes green light quantum dots, a second protective layer and a plurality of second hydrophobic ends. The second protective layer covers the green light quantum dots. A plurality of second hydrophobic ends are arranged on the outer surface of the second protective layer. The display module is arranged on the transmission path of the illumination beam. Wherein, the thickness of the first protection layer is greater than the diameter of the red light quantum dots, and the thickness of the second protection layer is greater than the diameter of the green light quantum dots.

In an embodiment of the present invention, the diameters of each of the above-mentioned red light conversion units and each of the green light conversion units are larger than 15 nm.

In an embodiment of the present invention, the plurality of first hydrophobic ends include polysilane polymer hydrophobic functional groups, and the plurality of second hydrophobic ends include polysilane polymer hydrophobic functional groups.

In an embodiment of the present invention, the above-mentioned red light conversion layer includes a first colloid, and a plurality of red light conversion units are distributed on the first colloid. The green light conversion layer includes a second colloid, and a plurality of green light conversion units are distributed on the second colloid.

In an embodiment of the present invention, neither the above-mentioned surface of the red light conversion layer nor the surface of the green light conversion layer has a barrier film.

In an embodiment of the present invention, at least one of the above-mentioned red light conversion layer and the green light conversion layer is a patterned layer distributed in dots.

In an embodiment of the present invention, one of the above-mentioned red light conversion layer and the green light conversion layer is disposed on one of the top surface and the bottom surface of the light guide element. The other one of the red light conversion layer and the green light conversion layer is disposed on the other one of the top surface and the bottom surface of the light guide element.

In an embodiment of the present invention, the above-mentioned backlight module further includes a reflective layer located on one side of the bottom surface of the light guide element, wherein the red light conversion layer and the green light conversion layer are patterned dotted on the reflective layer Floor.

Based on the above, the embodiments of the present invention have at least one of the following advantages or functions. In the backlight module and display device of the present invention, the red and green light conversion layers respectively include a plurality of red and green light conversion units, and each red and green light conversion unit includes red and green light quantum dots, which can block water vapor and The first and second protective layers of air and multiple first and second hydrophobic ends that can block water vapor. Therefore, the wavelength of the light beam is converted by the red light conversion layer and the green light conversion layer without an additional barrier film. In this way, compared with the traditional method of configuring the barrier film, edge failure can be avoided and the protection effect can be further improved. In addition, omitting the configuration of the barrier film can also simplify the manufacturing process, save costs and reduce the thickness, and can improve the heat dissipation effect. Furthermore, the light guide element can therefore use a light guide plate made of polymethyl methacrylate or polycarbonate instead of a glass light guide plate with better water resistance.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail together with the accompanying drawings.

The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the drawings. The directional terms mentioned in the following embodiments, such as: up, down, left, right, front or back, etc., are only directions referring to the attached drawings. Accordingly, the directional terms are used to illustrate and not to limit the invention.

FIG. 1 is a schematic diagram of a display device according to an embodiment of the present invention. Please refer to Figure 1. This embodiment provides a display device 10 including a backlight module 100 and a display module 50 . Wherein, the backlight module 100 is used to provide the illumination light beam L2. The display module 50 is disposed on the transmission path of the illumination light beam L2, and is used for converting the illumination light beam L2 into an image light beam L3, so that the user can watch the image frame.

The display module 50 is, for example, a combination of an optical film, a liquid crystal layer and/or a light-transmitting substrate, and is used to integrate the illumination light beam L2 provided by the backlight module 100 to form a display image. The present invention does not limit the type or form of the display module 50 in the projection device 10 , and its detailed structure and implementation can be obtained from the general knowledge in the technical field for sufficient teaching, suggestion and implementation description, so it is not repeated here.

The backlight module 100 includes a light source assembly 110 , a light guide element 120 , a red light conversion layer 130 and a green light conversion layer 140 . The light source assembly 110 is, for example, a blue light emitting diode, which provides a blue light beam L1. The light guide element 120 is disposed on the transmission path of the light beam L1, and the light guide element 120 has an opposite top surface S1, a bottom surface S2, and a side surface S3 connecting the top surface S1 and the bottom surface S2. The light source assembly 110 is disposed on the side S3 of the light guide element 120 , so that the light beam L1 enters from the side S3 of the light guide element 120 , is reflected inside, and finally emits light toward the display module 50 from the top surface S1 . In this embodiment, the backlight module 100 may further include a reflective layer 150 located on one side of the bottom surface S2 of the light guide element 120 .

FIG. 2 is a schematic diagram of a red light conversion layer or a green light conversion layer according to an embodiment of the present invention. FIG. 3 is a schematic diagram of a red light conversion unit or a green light conversion unit according to an embodiment of the present invention. Please refer to Figure 1 to Figure 3. It should be noted that the content shown in FIG. 2 can simultaneously show the general structure of the red light conversion layer 130 and the green light conversion layer 140 , but it does not mean that the actual size and overall shape of the two are the same. Similarly, the content shown in FIG. 3 can simultaneously show the general structure of the red light conversion unit 132 and the green light conversion unit 142 , but it does not mean that the actual size and overall shape of the two are the same. Both the red light conversion layer 130 and the green light conversion layer 140 are disposed on the transmission path of the light beam L1, and there is a gap between the red light conversion layer 130 and the green light conversion layer 140 . In other words, the red light conversion layer 130 and the green light conversion layer 140 are independent structures. For example, referring to FIG. 1 at the same time, in this embodiment, the red light conversion layer 130 is disposed on the top surface S1 of the light guide element 120 and is formed by full surface coating, while the green light conversion layer 140 is disposed on the light guide The bottom surface S2 of the device 120 is a patterned layer distributed in dots, but the invention is not limited thereto.

The red light conversion layer 130 includes a plurality of red light conversion units 132, and each red light conversion unit 132 includes a red light quantum dot 200R, a first protective layer 210R, and a plurality of first hydrophobic ends 220R. Specifically, in this embodiment, the red light conversion layer 130 includes a first colloid 134 , and a plurality of red light conversion units 132 are distributed on the first colloid 134 . The first colloid 134 includes, for example, silicon epoxy, silicone or acrylic. It is worth mentioning that there is no additional barrier film outside the first colloid 134 , so the first colloid 134 is the outermost layer of the red light conversion layer 130 . In other words, the surface of the red light conversion layer 130 does not have a barrier film.

In detail, the red light quantum dot 200R is the luminescent core, for example, Cadmium selenide (CdSe) is used as the luminescent material, but the invention is not limited thereto. The diameter of the red light quantum dot 200R is about 4 to 6 nm. The first protective layer 210R covers the red quantum dots 200R, and is used as a shell of the red quantum dots 200R, and has the function of protecting the red quantum dots 200R from moisture and air.

The material of the first protective layer 210R includes, for example, silicon oxide (for example: silicon dioxide (SiO2)), cadmium sulfide (CdS) or zinc selenide (Zinc selenide, ZnSe), etc., but the present invention does not limited to this. It is worth mentioning that the thickness of the first protective layer 210R is greater than the diameter of the red quantum dot 200R. For example, in this embodiment, due to the configuration of the first protective layer 210R, the diameter of the combination of the red light quantum dots 200R and the first protective layer 210R (or the red light conversion unit 132 ) can reach greater than 15 nm. In a preferred embodiment, the above-mentioned diameter can reach 20 nm, but the present invention is not limited thereto.

A plurality of first hydrophobic ends 220R are disposed on the outer surface of the first protection layer 210R. In this embodiment, the plurality of first hydrophobic ends 220R include, for example, polysilane polymer hydrophobic functional groups. Therefore, the hydrophobic effect of the red light conversion unit 132 can be further improved, thereby protecting the red light quantum dots 200R inside.

Similarly, the green light conversion layer 140 includes a plurality of green light conversion units 142, and each green light conversion unit 142 includes a green light quantum dot 200G, a second protective layer 210G, and a plurality of second hydrophobic ends 220G. Specifically, in this embodiment, the green light conversion layer 140 includes a second colloid 144 , and a plurality of green light conversion units 142 are distributed on the second colloid 144 . The second colloid 144 includes epoxy silicon, silicon gel or acrylic, for example. It is worth mentioning that there is no additional barrier film outside the second colloid 144 , so the second colloid 144 is the outermost layer of the green light conversion layer 140 . In other words, the surface of the green light conversion layer 140 does not have a barrier film. In addition, the diameter of the green light quantum dot 200G is about 2 to 4 nanometers. The second protection layer 210G covers the green light quantum dots 200G, and is used as a shell of the green light quantum dots 200G, and has the function of protecting the green light quantum dots 200G from moisture and air. Also, the thickness of the second protection layer 210G is larger than the diameter of the green light quantum dot 200G. Wherein, the embodiment of the green light quantum dot 200G, the second protective layer 210G and the plurality of second hydrophobic ends 220G is similar to the embodiment of the red light quantum dot 200R, the first protective layer 210R and the plurality of first hydrophobic ends 220R, so here No longer.

Therefore, when the light beam L1 passes to the top surface S1 and the bottom surface S2 of the light guide element 120 , the wavelength can be converted by the red light conversion layer 130 and the green light conversion layer 140 . Moreover, since the red light quantum dot 200R and the green light quantum dot 200G respectively have a first protective layer 210R and a second protective layer 210G that can block water vapor and air, and a first hydrophobic end 220R and a second hydrophobic end that can block water vapor 220G, so that the surfaces of the red light conversion layer 130 and the green light conversion layer 140 do not need additional barrier films. In this way, compared with the traditional method of configuring the barrier film, edge failure can be avoided and the protection effect can be further improved. In addition, omitting the configuration of the barrier film can also simplify the manufacturing process, save costs and reduce the thickness, and can improve the heat dissipation effect. Furthermore, the light guide element 120 can therefore adopt a light guide plate made of polymethyl methacrylate (Poly (methyl methacrylate), PMMA) or polycarbonate (Polycarbonate, PC) without using a light guide plate with better water resistance. glass light guide plate.

Please refer to Figure 2. In this embodiment, the red light conversion layer 130 further includes a plurality of first diffusion particles 136 distributed in the first colloid 134 . The green light conversion layer 140 further includes a plurality of second diffusion particles 146 distributed in the second colloid 144 . In this way, the light beam L1 transmitted into the first colloid 134 or the second colloid 144 can be further diffused, so as to homogenize the illumination light beam L2 provided by the backlight module 100 .

FIG. 4 is a schematic diagram of a display device according to another embodiment of the present invention. Please refer to Figure 4. The display device 10A shown in FIG. 4 is similar to the display device 10 shown in FIG. 1 . The difference between the two is that, in this embodiment, the red light conversion layer 130A of the backlight module 100A is a patterned layer distributed in dots, and is reconfigured on the bottom surface S2 of the light guide element 120 . The green light conversion layer 140A is formed by full-surface coating, and is redistributed on the top surface S1 of the light guide element 120 . Therefore, when the light beam L1 passes to the top surface S1 and the bottom surface S2 of the light guide element 120 , the wavelength can be converted by the red light conversion layer 130A and the green light conversion layer 140A. In addition, the surface of the red light conversion layer 130A and the green light conversion layer 140A does not need to be additionally provided with a barrier film. Compared with the traditional method of disposing a barrier film, it can avoid edge failure, simplify the manufacturing process, save costs, reduce thickness, and improve heat dissipation. .

FIG. 5 is a schematic diagram of a display device according to another embodiment of the present invention. Please refer to Figure 5. The display device 10B shown in FIG. 5 is similar to the display device 10 shown in FIG. 4 . The difference between them is that, in this embodiment, the red light conversion layer 130A (patterned layer distributed in dots) of the backlight module 100B is redistributed on the top surface S1 of the light guide element 120 . The green light conversion layer 140A (formed by full-surface coating) is reconfigured on the bottom surface S2 of the light guide element 120 . Therefore, when the light beam L1 passes to the top surface S1 and the bottom surface S2 of the light guide element 120 , the wavelength can be converted by the red light conversion layer 130A and the green light conversion layer 140A. In addition, the surface of the red light conversion layer 130A and the green light conversion layer 140A does not need to be additionally provided with a barrier film. Compared with the traditional method of disposing a barrier film, it can avoid edge failure, simplify the manufacturing process, save costs, reduce thickness, and improve heat dissipation. .

FIG. 6 is a schematic diagram of a display device according to another embodiment of the present invention. Please refer to Figure 6. The display device 10C shown in FIG. 6 is similar to the display device 10 shown in FIG. 1 . The difference between the two is that, in this embodiment, the red light conversion layer 130 (formed by full-surface coating) of the backlight module 100C is redistributed on the bottom surface S2 of the light guide element 120 . The green light conversion layer 140 (a patterned layer distributed in a dot shape) is reconfigured on the top surface S1 of the light guide element 120 . Therefore, when the light beam L1 passes to the top surface S1 and the bottom surface S2 of the light guide element 120 , the wavelength can be converted by the red light conversion layer 130 and the green light conversion layer 140 . Moreover, the surface of the red light conversion layer 130 and the green light conversion layer 140 does not need to be additionally equipped with a barrier film. Compared with the traditional method of disposing a barrier film, it can avoid edge failure, simplify the manufacturing process, save costs, reduce thickness, and improve heat dissipation. .

FIG. 7 is a schematic diagram of a display device according to another embodiment of the present invention. Please refer to Figure 7. The display device 10D shown in FIG. 7 is similar to the display device 10 shown in FIG. 1 . The difference between them is that, in this embodiment, the red light conversion layer 130B and the green light conversion layer 140B of the backlight module 100D are arranged on the reflective layer 150 , and the red light conversion layer 130B and the green light conversion layer 140B are dots. A patterned layer distributed on the reflective layer 150 . Specifically, the dot-shaped red light conversion layers 130B and the dot-shaped green light conversion layers 140B may be alternately distributed. Therefore, when the light beam L1 is delivered to the reflective layer 150 , the wavelength can be converted by the red light conversion layer 130B and the green light conversion layer 140B. In addition, the surfaces of the red light conversion layer 130B and the green light conversion layer 140B do not need additional barrier films, which can avoid edge failure, simplify the manufacturing process, save costs, reduce thickness, and improve heat dissipation compared with the traditional method of disposing barrier films. .

To sum up, in the backlight module and display device of the present invention, the red and green light conversion layers respectively include a plurality of red and green light conversion units, and each red and green light conversion units respectively include red and green light quantum dots, The first and second protective layers that can block water vapor and air, and the multiple first and second hydrophobic ends that can block water vapor. Therefore, the wavelength of the light beam is converted by the red light conversion layer and the green light conversion layer without an additional barrier film. In this way, compared with the traditional method of configuring the barrier film, edge failure can be avoided and the protection effect can be further improved. In addition, omitting the configuration of the barrier film can also simplify the manufacturing process, save costs and reduce the thickness, and can improve the heat dissipation effect. Furthermore, the light guide element can therefore use a light guide plate made of polymethyl methacrylate or polycarbonate instead of a glass light guide plate with better water resistance.

But the above-mentioned person is only preferred embodiment of the present invention, when can not limit the scope of the present invention implementation with this, promptly all the simple equivalent changes and modifications that are done according to the patent scope of the present invention and the content of the description of the invention, All still belong to the scope that the patent of the present invention covers. In addition, any embodiment or scope of claims of the present invention does not need to achieve all the objectives or advantages or features disclosed in the present invention. In addition, the abstract and the title are only used to assist in the search of patent documents, and are not used to limit the scope of rights of the present invention. In addition, terms such as "first" and "second" mentioned in this specification or the scope of the patent application are only used to name elements (elements) or to distinguish different embodiments or ranges, and are not used to limit the number of elements. upper or lower limit.

10, 10A, 10B, 10C, 10D: display device 50:Display module 100,100A,100B,100C,100D: backlight module 110:Light source component 120: Light guide element 130, 130A, 130B: red light conversion layer 132: Red light conversion unit 134: The first colloid 136: The first diffusion particle 140, 140A, 140B: green light conversion layer 142: Green light conversion unit 144: The second colloid 146:Second diffusion particle 150: reflective layer 200G: Green Quantum Dots 200R: red quantum dots 210G: Second protective layer 210R: first protective layer 220G: the second hydrophobic end 220R: the first hydrophobic end L1: light beam L2: Lighting beam L3: image beam S1: top surface S2: bottom surface S3: side.

FIG. 1 is a schematic diagram of a display device according to an embodiment of the present invention. FIG. 2 is a schematic diagram of a red light conversion layer or a green light conversion layer according to an embodiment of the present invention. FIG. 3 is a schematic diagram of a red light conversion unit or a green light conversion unit according to an embodiment of the present invention. FIG. 4 is a schematic diagram of a display device according to another embodiment of the present invention. FIG. 5 is a schematic diagram of a display device according to another embodiment of the present invention. FIG. 6 is a schematic diagram of a display device according to another embodiment of the present invention. FIG. 7 is a schematic diagram of a display device according to another embodiment of the present invention.

10: Display device

50:Display module

100: Backlight module

110:Light source component

120: Light guide element

130: red light conversion layer

140: Green light conversion layer

150: reflective layer

L1: light beam

L2: Lighting beam

L3: image beam

S1: top surface

S2: bottom surface

S3: side

Claims (20)

A backlight module, comprising: a light source assembly for providing a light beam; A light guide element is arranged on the transmission path of the light beam, and the light source component is arranged on one side of the light guide element; A red light conversion layer, configured in the transmission path of the light beam, the red light conversion layer includes a plurality of red light conversion units, each of the plurality of red light conversion units includes: A red light quantum dot; a first protective layer covering the red light quantum dots; and a plurality of first hydrophobic ends configured on the outer surface of the first protective layer; and A green light conversion layer, configured in the transmission path of the light beam, the green light conversion layer includes a plurality of green light conversion units, each of the plurality of green light conversion units includes: A green light quantum dot; A second protective layer, covering the green light quantum dots; and A plurality of second hydrophobic ends are arranged on the outer surface of the second protective layer, wherein the thickness of the first protective layer is greater than the diameter of the red light quantum dots, and the thickness of the second protective layer is greater than the diameter of the green quantum dots. The diameter of the photon quantum dot. The backlight module according to claim 1, wherein the diameters of each of the plurality of red light conversion units and each of the plurality of green light conversion units are larger than 15 nanometers. The backlight module according to claim 1, wherein the first protective layer includes silicon oxide, cadmium sulfide or zinc selenide, and the second protective layer includes silicon oxide, cadmium sulfide or zinc selenide. The backlight module according to claim 1, wherein the plurality of first hydrophobic ends include polysilane polymer hydrophobic functional groups, and the plurality of second hydrophobic ends include polysilane polymer hydrophobic functional groups. The backlight module according to claim 1, wherein the red light conversion layer includes a first colloid, the plurality of red light conversion units are distributed on the first colloid, and the green light conversion layer includes a second colloid Colloid, the plurality of green light conversion units are distributed in the second colloid. The backlight module as claimed in item 5, wherein the first colloid includes epoxy silicon, silicon rubber or acrylic, and the second colloid includes epoxy silicon, silicon rubber or acrylic. The backlight module according to claim 5, wherein the red light conversion layer further includes a plurality of first diffusion particles distributed in the first colloid, and the green light conversion layer further includes a plurality of second diffusion particles, Distributed in the second colloid. The backlight module according to claim 1, wherein neither the surface of the red light conversion layer nor the surface of the green light conversion layer has a barrier film. The backlight module according to claim 1, wherein the red light conversion layer is spaced from the green light conversion layer. The backlight module according to claim 1, wherein at least one of the red light conversion layer and the green light conversion layer is a patterned layer distributed in dots. The backlight module according to claim 1, wherein one of the red light conversion layer and the green light conversion layer is disposed on one of a top surface and a bottom surface of the light guide element, the The other one of the red light conversion layer and the green light conversion layer is disposed on the other one of the top surface and the bottom surface of the light guide element. The backlight module according to claim 1, further comprising a reflective layer located on one side of a bottom surface of the light guide element, wherein the red light conversion layer and the green light conversion layer are distributed in dots The patterned layer on the reflective layer. A display device comprising: A backlight module is used to provide an illumination beam, and the backlight module includes: a light source assembly for providing a light beam; A light guide element is arranged on the transmission path of the light beam, and the light source component is arranged on one side of the light guide element; A red light conversion layer, configured in the transmission path of the light beam, the red light conversion layer includes a plurality of red light conversion units, each of the plurality of red light conversion units includes: A red light quantum dot; a first protective layer covering the red light quantum dots; and a plurality of first hydrophobic ends configured on the outer surface of the first protective layer; and A green light conversion layer, configured in the transmission path of the light beam, the green light conversion layer includes a plurality of green light conversion units, each of the plurality of green light conversion units includes: A green light quantum dot; A second protective layer, covering the green light quantum dots; and a plurality of second hydrophobic ends configured on the outer surface of the second protective layer; and A display module, configured in the transmission path of the illumination beam, wherein the thickness of the first protective layer is greater than the diameter of the red quantum dots, and the thickness of the second protective layer is greater than the diameter of the green quantum dots . The display device as claimed in claim 13, wherein the diameters of each of the plurality of red light conversion units and each of the plurality of green light conversion units are greater than 15 nm. The display device according to claim 13, wherein the plurality of first hydrophobic ends include polysilane polymer hydrophobic functional groups, and the plurality of second hydrophobic ends include polysilane polymer hydrophobic functional groups. The display device according to claim 13, wherein the red light conversion layer includes a first colloid, the plurality of red light conversion units are distributed on the first colloid, and the green light conversion layer includes a second colloid , the plurality of green light conversion units are distributed in the second colloid. The display device according to claim 13, wherein neither the surface of the red light conversion layer nor the surface of the green light conversion layer has a barrier film. The display device according to claim 13, wherein at least one of the red light conversion layer and the green light conversion layer is a patterned layer distributed in dots. The display device according to claim 13, wherein one of the red light conversion layer and the green light conversion layer is disposed on one of a top surface and a bottom surface of the light guide element, and the red light conversion layer The other one of the light conversion layer and the green light conversion layer is disposed on the other one of the top surface and the bottom surface of the light guide element. The display device according to claim 13, wherein the backlight module further includes a reflective layer located on one side of a bottom surface of the light guide element, the red light conversion layer and the green light conversion layer are dots A patterned layer distributed on the reflective layer.

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