CN218181265U - Quantum dot lens, backlight module and display device - Google Patents

Abstract

The application relates to a quantum dot lens, a backlight module and a display device. The quantum dot lens comprises a lens main body and a quantum dot film layer, wherein the lens main body comprises a light inlet surface and a light outlet surface, the light inlet surface is arranged opposite to a light source, the quantum dot film layer completely covers the light outlet surface of the lens main body, and the quantum dot film layer and the lens main body are integrally formed. The quantum dot film layer and the lens main body are arranged in a layered mode, and the quantum dot film layer completely covers the light emitting surface, so that light emitted by the light source is emitted from the edge of the backlight module after passing through the quantum dot film layer, the problem of blue light at the edge of the backlight module in the prior art is solved, and the backlight module is improved to display uniformly.

Description

Quantum dot lens, backlight module and display device

Technical Field

The application relates to the technical field of display, in particular to a quantum dot lens, a backlight module and a display device.

Background

The quantum dot display device realizes a high color gamut scheme, and is mainly made of a backlight module and quantum dot integrated materials. For example, the quantum dot lens in the prior art is mainly manufactured in two ways: one is that the lens main body and the quantum dot film layer are integrated into a quantum dot lens, the two are independent layered structures, the quantum dot film layer is arranged on the light-emitting side of the lens main body, the light source is arranged on the backlight side of the lens main body, and after light emitted by the light source passes through the lens main body, part of the light source does not pass through the quantum dot film layer and is directly projected to the edge of the screen, so that the screen is easy to leak blue light; and secondly, the lens main body is used as a substrate, the quantum dot material is doped in the lens main body, and the problem of blue light leakage can be caused due to uneven light mixing of the quantum dot material and the lens main body. In conclusion, the quantum dot lens in the prior art is prone to blue light leakage, so that the quantum dot display product is uneven in display and not beneficial to narrow-frame product design.

SUMMERY OF THE UTILITY MODEL

The present application is directed to a quantum dot lens, a backlight module and a display device,aiming at improving the quantum dot display yield The product showed uniformity.

In a first aspect, an embodiment of the present application provides a quantum dot lens, where the quantum dot film layer completely covers the light emitting surface of the lens main body.

In an embodiment of the present application, the lens body is integrally injection molded on the backlight side of the quantum dot film layer.

In an embodiment of the present application, the lens body is made of resin.

In an embodiment of this application, the shape of lens main part is the hemisphere, hemisphere lens main part one side includes the hemisphere face, the hemisphere face is the play plain noodles, hemisphere lens main part opposite side includes the annular surface and locates the inner concave cylindrical surface at annular surface center, the inner concave cylindrical surface is for going into the plain noodles, the light source is arranged in the inner concave cylindrical surface.

In an embodiment of the present application, the shape of the lens main body is cylindrical, the light emitting surface of the cylindrical lens main body includes an inward concave conical surface and a cylindrical surface around the circumference of the inward concave conical surface, the surface of the inward concave conical surface protrudes outward to form an arc surface, one side of the cylindrical lens main body departing from the inward concave conical surface is provided with an annular surface and is arranged on an inward concave cylindrical surface at the center of the annular surface, the inward concave cylindrical surface is a light incident surface, and the light source is arranged in the inward concave cylindrical surface.

In one embodiment of the present application, the quantum dot film layer includes: a film layer main body; the first barrier layer is formed on one side, facing the lens body, of the quantum dot film; the second barrier layer is formed on one side, away from the lens body, of the quantum dot film; wherein the first barrier layer and the second barrier layer are used for blocking water vapor.

In an embodiment of the present application, the first barrier layer covers completely go out the plain noodles, the first barrier layer with the material of second barrier layer is high temperature resistant airtight material that insulates against heat.

In one embodiment of the present application, the light source includes: and a blue LED.

In a third aspect, an embodiment of the present application provides a display device, including: a liquid crystal display panel; and the backlight module according to any one of the second aspect, wherein the backlight module is arranged on the backlight side of the liquid crystal display panel and is used for providing a light source for the liquid crystal display panel.

According to the quantum dot lens that this application embodiment provided, backlight unit and display device, quantum dot lens includes lens main part and quantum dot rete, the two is independent lamellar structure each other, lens main part has income plain noodles and play plain noodles, it sets towards the light source to go into the plain noodles, thereby the light that the light source sent gets into lens main part through going into the plain noodles, and from going out the plain noodles outgoing, the quantum dot rete that the quantum dot material was covered to the quantum dot rete covers the play plain noodles completely, make all blue light that go out from the play plain noodles of lens main part refract or reflect the back through the quantum dot rete that is covered with the quantum dot material, and fully arouse quantum dot material of equidimension not in the quantum dot rete and send red light and green light, three kinds of color light form white light after fully mixing, jet out from quantum dot lens surface, the problem of current quantum dot display device edge blue light has been solved to the embodiment, the demonstration degree of consistency of quantum dot display product has been promoted.

Drawings

Features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings. In the drawings, like parts are provided with like reference numerals. The drawings are not necessarily to scale, and are merely intended to illustrate the relative positions of the layers, the thicknesses of the layers in some portions being exaggerated for clarity, and the thicknesses in the drawings are not intended to represent the proportional relationships of the actual thicknesses.

FIG. 1 is a schematic diagram of a backlight module according to the prior art;

FIG. 2 is a schematic diagram of a backlight module according to another prior art;

fig. 3 is a schematic diagram illustrating a structure of a quantum dot lens according to a first embodiment of the present application;

fig. 4 shows a schematic structural diagram of another quantum dot lens according to the first embodiment of the present application;

fig. 5 shows a cross-sectional view of a quantum dot film layer of a first embodiment of the present application;

fig. 6 is a schematic structural diagram of a backlight module according to a second embodiment of the present application;

FIG. 7 is a schematic view of another backlight module according to a second embodiment of the present application;

fig. 8 is a schematic structural view showing a display device according to a third embodiment of the present application;

fig. 9 shows a flow chart of a method of fabricating a quantum dot lens according to a fourth embodiment of the present application;

FIG. 10 is a schematic structural diagram corresponding to the step S1 in FIG. 9;

FIG. 11 is a schematic structural diagram corresponding to the step S2 in FIG. 9;

fig. 12 is a schematic structural diagram corresponding to step S3 in fig. 9;

fig. 13 is a schematic structural diagram corresponding to step S4 in fig. 9;

fig. 14 is a flowchart illustrating a method for manufacturing a backlight module according to a fifth embodiment of the present application.

Description of reference numerals:

100. a backlight module; 1. a light source; 11. a substrate; 2. a quantum dot lens; 21. a lens main body; 211. a hemispherical surface; 212. an inner concave conical surface; 2121. an arc-shaped surface; 213. an annular face; 214. an inwardly concave cylindrical surface; 215. a cylindrical surface; 22. a quantum dot film layer; 221. a first barrier layer; 222. a second barrier layer; 223. a film layer main body; 3. a diffuser plate; 4. an optical film layer; 5. an array substrate; 6. a liquid crystal layer; 7. a color film substrate; 8. a first mold; 9. and a second mold.

Detailed Description

Features and exemplary embodiments of various aspects of the present application will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof. In the drawings and the following description, at least some well-known structures and techniques have not been shown to avoid unnecessarily obscuring the present application; also, the size of the region structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

The following describes specific structures of the quantum dot lens, the backlight module and the touch display device provided in the embodiment of the present application with reference to the drawings.

Quantum dot display (QD) and Organic Light-Emitting Diode (OLED) are two major mainstream novel display technologies at present. The design of quantum dot Display on the light source technology of the traditional Liquid Crystal Display (LCD for short) product has the core that the color gamut of the screen is obviously improved, and the popularization cost of the quantum dot LCD product is lower than that of an organic electro-luminescence Display product, so that the quantum dot LCD product is the upgrading direction and the standard matching trend of the Display industry.

The embodiments of the present application are described below with reference to the accompanying drawings, taking a quantum dot liquid crystal display product as an example:

fig. 1 is a schematic structural diagram of a backlight module in the prior art, and fig. 2 is a schematic structural diagram of a backlight module in another prior art.

The scheme for realizing high color gamut of the quantum dot liquid crystal display product mainly adopts components integrated with quantum dots through the backlight module 100, and the components include, for example, a quantum dot film (QD film), a quantum dot diffuser Plate 3 (QD differential Plate), a quantum dot tube (QD tube), a quantum dot LED (QD LED), a quantum dot Lens 2 (QD Lens), and the like, and first, as shown in fig. 1, a quantum dot film layer 22 is disposed between the optical film layer and the diffuser Plate 3, or, as shown in fig. 2, the diffuser Plate 3 is used as a base material, and the base material is doped with quantum dot materials, and the above-mentioned methods all need to use a large amount of quantum dot materials, so that the cost is relatively high, and the existing quantum dot LED contains chromium element, and does not meet the requirement of environmental protection; secondly, blue light emitted by the light source 1 cannot be guaranteed to completely pass through the quantum dots, and light which does not pass through the quantum dots is directly emitted from the edge of the backlight module 100 to cause the problem of blue light leakage, or the problem of blue light leakage caused by uneven light mixing of a quantum dot material and the backlight module 100 is not favorable for the design of narrow-frame products; finally, the known quantum dot lens 2 needs to be assembled for many times and quantum dot materials are injected or coated and cured separately, so that the realization process is difficult and the structure is complex.

First embodiment

Fig. 3 shows a schematic structural diagram of a quantum dot lens according to a first embodiment of the present application, fig. 4 shows a schematic structural diagram of another quantum dot lens according to the first embodiment of the present application, and fig. 5 shows a cross-sectional view of a quantum dot film layer according to the first embodiment of the present application.

As shown in fig. 3 to 4, an embodiment of the present application provides a quantum dot lens 2, including a lens main body 21 and a quantum dot film layer 22, where the lens main body 21 includes a light incident surface and a light exit surface, the light incident surface is disposed opposite to the light source 1, and the quantum dot film layer 22 completely covers the light exit surface of the lens main body 21.

According to the quantum dot lens 2 provided in the embodiment of the present application, the quantum dot lens 2 includes a lens main body 21 and a quantum dot film layer 22, which are independent from each other, the lens main body 21 has an incident surface and an exit surface, the incident surface is disposed toward the light source 1, so that light emitted from the light source 1 enters the lens main body 21 through the incident surface and exits from the exit surface, the quantum dot film layer 22 completely covers the exit surface, so that all blue light emitted from the exit surface of the lens main body 21 is refracted or reflected and then passes through the quantum dot film layer 22 filled with quantum dots, and quantum dot materials with different sizes in the quantum dot film layer 22 are sufficiently excited to emit red light and green light, the three color lights are sufficiently mixed to form white light and exit from the surface of the quantum dot lens 2, in the embodiment of the present application, the quantum dot film layer 22 covers the entire exit surface of the lens main body 21, blue light at the edge of the backlight module 100 or blue light leakage of the lens does not occur, and the display uniformity of a quantum dot display product is improved; in addition, the use of quantum dot materials is reduced, the material cost of a display product is reduced, and the LED is not doped with the quantum dot materials and meets the requirement of environmental protection.

Further, the lens body 21 is integrally injection-molded on the backlight side of the quantum dot film layer 22, and the material of the lens body 21 is a resin material.

For the preparation of the quantum dot lens 2, a quantum dot film layer 22 with a corresponding size and a whole set of metal molds for forming the quantum dot lens 2 are prepared in advance according to the shape and the size of the surface of the required lens main body 21, wherein the whole set of metal molds comprises a first mold 8 and a second mold 9, the manufactured quantum dot film layer 22 is placed into the first mold 8, the quantum dot film layer 22 is attached to the inner wall of the first mold 8, the first mold 8 and the second mold 9 are closed, resin materials required for forming the lens main body 21 are injected, in a cavity formed by the first mold 8 and the second mold 9, the quantum dot film layer 22 completely covers the light-emitting surface of the lens main body 21, and the resin on the light-emitting surfaces of the quantum dot film layer 22 and the lens main body 21 is fused due to high temperature and high pressure to form the integrated quantum dot lens 2.

Therefore, the quantum dot film layer 22 prepared in advance is placed in the metal mold, and in the process of injecting resin into the lens main body 21, the quantum dot film layer 22 and the lens main body 21 are combined to form an integrated structure, so that the quantum dot film covers the whole light emitting surface of the lens main body 21, and the problem of blue light leakage of the edge of the backlight module 100 or the lens cannot occur. In addition, the process of integrally forming the quantum dot film layer 22 and the lens main body 21 in the metal mold simplifies the structure and the manufacturing process of the quantum dot lens 2, avoids the multiple assembly of the existing quantum dot lens 2 and the independent injection or coating and solidification of quantum dot materials, and simultaneously, the quantum dot film layer 22 with any formula in any metal mold can be combined with the lens main body 21 with any shape, thereby realizing the flexible and diversified optical structure scheme of the quantum dot lens 2.

In addition, the lens body 21 may also be made of other materials, such as fused silica, calcium fluoride, magnesium fluoride, silicon, germanium, zinc selenide, etc., as long as the material can refract or reflect light, which is not described herein again.

Referring to fig. 3, in an embodiment of the present application, the lens main body 21 is hemispherical, one side of the hemispherical lens main body 21 includes a hemispherical surface 211, the hemispherical surface 211 is an outgoing surface, the other side of the hemispherical lens main body 21 includes an annular surface 213 and an inner concave cylindrical surface 214 disposed at the center of the annular surface 213, the inner concave cylindrical surface 214 is an incoming surface, and the light source 1 is disposed in the inner concave cylindrical surface 214.

With reference to fig. 4, in another embodiment of the present invention, the lens main body 21 is cylindrical, the light emitting surface of the cylindrical lens main body 21 includes an indent conical surface 212 and a cylindrical surface 215 disposed at the periphery of the indent conical surface 212, the surface of the indent conical surface 212 protrudes outward to form an arc surface 2121, one side of the cylindrical lens main body 21 away from the indent conical surface 212 includes an annular surface 213 and an indent cylindrical surface 214 disposed at the center of the annular surface 213, the indent cylindrical surface 214 is a light incident surface, and the light source 1 is disposed in the indent cylindrical surface 214.

The concave cylindrical surface 214 can completely cover the light source 1, and can converge the blue light emitted by the light source 1, so as to prevent the blue light emitted by the light source 1 from being directly emitted from the edge of the backlight module 100 without passing through the quantum dot lens 2, which results in the occurrence of the problem of blue light leakage.

It should be noted that the shape of the light-emitting surface of the lens main body 21 may be any shape not limited to the hemispherical surface 211 and the concave conical surface 212 shown in the figure, and the quantum dot film on the surface of the quantum dot lens 2 may be a quantum dot film with any quantum dot formula, so as to meet different optical design requirements.

As shown in fig. 5, for the specific structure of the quantum dot film layer 22, the quantum dot film layer 22 includes: a film body 223; a first barrier layer 221 formed on a side of the quantum dot film facing the lens body 21; and a second barrier layer 222 formed on a side of the quantum dot film facing away from the lens body 21.

Because the quantum dots have low tolerance to water, in the quantum dot material with the core-shell structure, the surface ligand plays an important role in maintaining the stable structure of the quantum dots and maintaining the high-efficiency luminescence of the quantum dots. However, due to the influence of adverse factors such as hot water and light, the ligand on the surface of the quantum dot may drop or lose effectiveness due to chemical reaction, and therefore the first barrier layer 221 and the second barrier layer 222 are respectively arranged on the two sides of the film layer main body 223, the first barrier layer 221 and the second barrier layer 222 are made of high-temperature-resistant heat-insulating airtight materials and used for blocking water vapor, and the water vapor on other layers is prevented from entering the film layer main body 223 through the first barrier layer 221 and the second barrier layer 222 and losing effectiveness due to chemical reaction with the quantum dot material.

In the preparation process of the quantum dot lens 2, the first blocking layer 221 completely covers the light emitting surface, and the film layer main body 223 completely covers the first blocking layer 221, so that after the blue light passing through the lens main body 21 completely passes through the quantum dot material in the film layer main body 223, the quantum dot materials with different sizes in the quantum dot film layer 22 are fully excited to emit red light and green light, and the three colors of light are fully mixed to form white light.

Specifically, the materials of the first barrier layer 221 and the second barrier layer 222 are not limited to high light-transmitting materials such as polyester resin (PET), polyethylene (PE), and polymethyl methacrylate (PMMA).

Second embodiment

Fig. 6 is a schematic structural diagram of a backlight module 100 according to a second embodiment of the present application. Fig. 7 is a schematic structural diagram of another backlight module 100 according to a second embodiment of the present application.

As shown in fig. 6-7, on the basis of the first embodiment, the embodiment of the present application provides a backlight module 100, which includes: a light source 1; and the quantum dot lens 2 according to the first embodiment or the second embodiment, wherein the light incident surface of the quantum dot lens 2 faces the light source 1.

The backlight module 100 further includes: the quantum dot lens comprises a substrate 11, a light source 1 and a quantum dot lens 2, wherein the light source 1 is arranged on one side of the substrate 11, and the quantum dot lens 2 is arranged on one side, deviating from the substrate 11, of the light source 1; the diffusion plate 3 is arranged on one side, away from the substrate 11, of the quantum dot lens 2; and the optical film layer is arranged on one side of the diffusion plate 3 departing from the substrate 11.

The substrate 11 is a PCB, and the quantum dot lens 2 is attached to the PCB by physical or chemical bonding techniques, specifically, may be bonded by UV curing adhesive or other adhesives, or welded by ultrasonic, and forms a complete quantum dot lamp panel with the light source 1 mounted on the PCB. Further, the quantum dot lamp panel and other backlight module 100 structural members such as the diffuser plate 3 plate and the optical film layer form the backlight module 100 together.

In addition, the light source 1 is a blue LED. Blue light that blue light LED sent gets into quantum dot rete 22 through lens main part 21 refraction or reflection and fully excites quantum dot material of equidimension not in the quantum dot rete 22 and sends ruddiness and green glow, red, green, blue three-color light forms white light after the intensive mixing, jet out from 2 surfaces of quantum dot lens, multi-point light source 1 that 2 jets out of quantum dot lens is through the space mixed light, behind diffuser plate 3 and the mixed light of optics rete, form the backlight unit 100 area light source 1 of even wide colour gamut. The backlight module 100 provided in this embodiment includes the quantum dot lens 2 of the first embodiment, and thus has the same technical advantages as the quantum dot lens 2, and further description thereof is omitted here.

Third embodiment

Fig. 8 is a schematic structural view of a display device according to a third embodiment of the present application.

As shown in fig. 8, on the basis of the first embodiment and the second embodiment, the present embodiment proposes a display device including: a liquid crystal display panel; and the backlight module 100, the backlight module 100 is arranged at the backlight side of the liquid crystal display panel and is used for providing a light source 1 for the liquid crystal display panel.

Specifically, the liquid crystal display panel includes an array substrate 115, a liquid crystal layer 6 and a color film substrate 117 that are sequentially disposed, the backlight module 100 is disposed on a backlight side of the array substrate 115, further, an optical film layer 4 of the backlight module 100 is disposed on a side of the array substrate 115 away from the liquid crystal layer 6, and a light source 1 is provided for the liquid crystal display panel through a light source 1 of the backlight module 100.

The display device provided in the present embodiment includes the backlight module 100 of the second embodiment, and therefore has the same technical advantages as the backlight module 100, and further description is omitted here.

Fourth embodiment

Fig. 9 is a flowchart illustrating a method for manufacturing a quantum dot lens according to a fourth embodiment of the present disclosure, fig. 10 is a schematic structural diagram corresponding to step S1 in fig. 9, fig. 11 is a schematic structural diagram corresponding to step S2 in fig. 9, fig. 12 is a schematic structural diagram corresponding to step S3 in fig. 9, and fig. 13 is a schematic structural diagram corresponding to step S4 in fig. 9.

As shown in fig. 9 to fig. 13, on the basis of the first embodiment, the second embodiment, the third embodiment and the fourth embodiment, the present embodiment provides a method for manufacturing a quantum dot lens 2, which includes the following steps:

s1, manufacturing a quantum dot film layer 22 with a corresponding size and a whole set of metal molds for forming the lens main body 21 according to the shape and the size of the lens main body 21, wherein the metal molds comprise a first mold 8 and a second mold 9;

s2, placing the manufactured quantum dot film layer 22 into a first mold 8, and attaching a second barrier layer 222 of the quantum dot film layer 22 to the inner wall of the first mold 8;

s3, the first mold 8 and the second mold 9 are closed, resin materials required for molding the lens main body 21 are injected, in a cavity formed by the metal molds, the first blocking layer 221 of the quantum dot film layer 22 completely covers the light-emitting surface of the lens main body 21, and the first blocking layer 221 and the resin on the light-emitting surface of the lens main body 21 are fused at high temperature and high pressure to form the integrated quantum dot lens 2;

and S4, after the quantum dot lens 2 is molded, demolding the molded quantum dot lens 2.

This embodiment is through combining current ripe technology, carries out useful design to quantum dot lens 2 and manufacturing method thereof, aims at solving current backlight unit 100 marginal blue light to and the problem that the quantum dot material consumptive material is many, reaches the purpose that promotes backlight unit 100 and shows evenly and reduce quantum dot material use amount.

Fifth embodiment

Fig. 14 is a flowchart illustrating a method for manufacturing a backlight module 100 according to a fifth embodiment of the present application.

As shown in fig. 14, on the basis of the fourth embodiment, the present embodiment further provides a method for manufacturing a backlight module 100 based on the quantum dot lens 2, including the following steps:

s5, providing a substrate 11 attached with the light source 1;

s6, sticking the formed quantum dot lens 2 on the substrate 11 through a UV curing adhesive or other adhesive needles, or welding the quantum dot lens 2 on the substrate 11 through ultrasonic waves to form a complete quantum dot lamp panel;

s7, attaching a diffusion plate 3 to the light emergent side of the quantum dot lamp panel;

and S8, attaching the optical film layer 4 to the light emergent side of the diffusion plate 3 to form the backlight module 100.

The manufacturing method of the backlight module 100 provided in this embodiment is based on the manufacturing method of the quantum dot lens 2, and therefore has the same technical advantages as the manufacturing method of the quantum dot lens 2, and is not described herein again.

It should be readily understood that "over 8230" \8230on "," over 82308230; "over 8230;" and "over 8230;" over 8230 ";" in the present application should be interpreted in the broadest manner such that "over 8230;" over 8230 ";" not only means "directly over" something but also includes the meaning of "over" and having intermediate features or layers therebetween, and "over 8230;" 8230 ";" over or "over 8230"; "over not only includes the meaning of" over "or" over "something but also may include the meaning of" over "or" over "with no intermediate features or layers therebetween (i.e., directly over something).

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. The utility model provides a quantum dot lens, includes lens main part and quantum dot rete, lens main part is including going into the plain noodles and going out the plain noodles, go into the plain noodles and set up its characterized in that with the light source relatively:

the quantum dot film layer completely covers the light-emitting surface of the lens main body.

2. The quantum dot lens of claim 1, wherein the lens body is integrally injection molded on the backlight side of the quantum dot film layer.

3. The quantum dot lens of claim 1 or 2, wherein the lens body is made of a resin material.

4. The quantum dot lens of claim 1, wherein the lens body is hemispherical, one side of the hemispherical lens body comprises a hemispherical surface, the hemispherical surface is a light emitting surface, the other side of the hemispherical lens body comprises an annular surface and an inner concave cylindrical surface arranged at the center of the annular surface, the inner concave cylindrical surface is a light incident surface, and the light source is arranged in the inner concave cylindrical surface.

5. The quantum dot lens according to claim 1, wherein the lens body is cylindrical, the light-emitting surface of the cylindrical lens body comprises an inward-concave conical surface and a cylindrical surface around the circumference of the inward-concave conical surface, the surface of the inward-concave conical surface protrudes outward to form an arc surface, one side of the cylindrical lens body facing away from the inward-concave conical surface is provided with an annular surface and an inward-concave cylindrical surface arranged at the center of the annular surface, the inward-concave cylindrical surface is a light-incident surface, and the light source is arranged in the inward-concave cylindrical surface.

6. The quantum dot lens of claim 1, wherein the quantum dot film layer comprises:

a film layer main body;

the first blocking layer is formed on one side, facing the lens main body, of the quantum dot film; and

the second barrier layer is formed on one side, away from the lens body, of the quantum dot film;

wherein the first barrier layer and the second barrier layer are used for blocking water vapor.

7. The quantum dot lens of claim 6, wherein the first blocking layer completely covers the light emitting surface; the first barrier layer and the second barrier layer are made of high-temperature-resistant heat-insulation airtight materials.

8. A quantum dot lens according to claim 1, wherein the light source comprises: and a blue LED.

9. A backlight module, comprising:

a light source; and

the quantum dot lens of any one of claims 1-8, having an incident surface facing the light source.

10. A display device, comprising:

a liquid crystal display panel; and

the backlight module as claimed in claim 9, wherein the backlight module is disposed on a backlight side of the liquid crystal display panel for providing a light source to the liquid crystal display panel.

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