CN214011689U - Quantum dot backlight module and display device - Google Patents
Quantum dot backlight module and display device Download PDFInfo
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- CN214011689U CN214011689U CN202023123875.0U CN202023123875U CN214011689U CN 214011689 U CN214011689 U CN 214011689U CN 202023123875 U CN202023123875 U CN 202023123875U CN 214011689 U CN214011689 U CN 214011689U
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Abstract
The utility model provides a quantum dot backlight unit and display device, quantum dot backlight unit includes: a quantum dot layer; the quantum dot layer comprises a quantum dot body film and a water-oxygen barrier film, and the water-oxygen barrier film is located on the whole surface of the quantum dot body film. The quantum dot backlight module can effectively improve the water and oxygen blocking capacity of the quantum dot layer, solves the failure problems of edge shrinkage, color change and the like of the quantum dot layer in a high-humidity high-temperature environment, and meets the high-reliability requirements of high temperature, high humidity, cold and hot impact and the like.
Description
Technical Field
The utility model relates to a show technical field, concretely relates to quantum dot backlight unit and display device.
Background
In recent years, the development of small-size display devices is proceeding toward a narrow frame or even a frame-free direction, and a display device screen generally comprises a liquid crystal panel and a backlight module, wherein the liquid crystal panel sequentially comprises an upper polarizing film, a color filter, a liquid crystal, a TFT and a lower polarizing film from top to bottom, the backlight module sequentially comprises a reflecting film, a light source, a light guide plate, a diffusion film, a lower brightness enhancement film (DEBF or CEDF) and an upper brightness enhancement film (DEBF or CEDF), and a layer of OCA adhesive is generally coated on the surface of the upper brightness enhancement film of the backlight module to be compounded with the lower polarizing film of the liquid crystal panel to form a liquid crystal display screen. However, because the existing backlight design scheme is to set diffusion films in the backlight module to achieve the effects of enhancing screen brightness and the like, when the frame range of the liquid crystal panel is small, the frame of the liquid crystal panel is difficult to completely shield blue light leaked from the periphery of the edge of the backlight module, the quantum dot films are used for replacing the existing diffusion films and are applied to small-size electronic products to reduce the blue light, meanwhile, the white light LED is changed into the blue light LED, the blue LED light is converted into green light and red light with high saturation degree through green and red quantum dots, and the green light and the red light are mixed with the rest unconverted blue light to obtain various colors such as white light and the like, and the color of a wide color gamut is displayed on the screen, so that the display effect of the LCD display module is improved.
The conventional quantum dot film backlight module is easily affected by water and oxygen, so that an invalid edge is generated, and the high reliability requirements such as high temperature, high humidity, cold and heat shock and the like cannot be met, namely the problem of display application in the fields of vehicle-mounted and industrial control cannot be met.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in overcoming the influence that quantum dot backlight unit received water oxygen easily among the prior art to produce invalid limit, can't satisfy the problem of high reliability requirements such as high humid tropical and cold and hot impact.
In order to solve the technical problem, the utility model provides a quantum dot backlight unit, include: a quantum dot layer; the quantum dot layer comprises a quantum dot body film and a water-oxygen barrier film, and the water-oxygen barrier film is located on the whole surface of the quantum dot body film.
Optionally, the quantum dot body film has a first extending surface and a second extending surface which are opposite to each other, the first extending surface and the second extending surface are arranged in the light emergent direction of the quantum dot body film, and the side wall of the quantum dot body film is located between the first extending surface and the second extending surface and connected with the first extending surface and the second extending surface; the water and oxygen barrier film is positioned on the first extension surface, the second extension surface and the side wall of the quantum dot body film.
Optionally, the sidewalls of the quantum dot bulk film comprise opposite first and second sidewalls, and opposite third and fourth sidewalls; the first side wall is respectively connected with the third side wall and the fourth side wall, and the second side wall is respectively connected with the third side wall and the fourth side wall; the water and oxygen barrier film of the quantum dot body film side wall is respectively positioned on the first side wall and the second side wall, and the third side wall and the fourth side wall.
Optionally, the sum of the thickness of the water and oxygen barrier film which is 2 times of the thickness of the quantum dot bulk film is 150 to 650 micrometers.
Optionally, the thickness of the water and oxygen barrier film is 5 um-500 um.
Optionally, the water oxygen barrier film is an organic water oxygen barrier film.
Optionally, the water and oxygen barrier film is a parylene water and oxygen barrier film.
Optionally, the method further includes: a backlight source; a reflective layer; the quantum dot layer is arranged on one side of the backlight source in the light emergent direction; the backlight is located between the quantum dot layer and the reflective layer.
Optionally, the quantum dot body film includes a plurality of quantum dot light regions, where the plurality of quantum dot light regions include a red quantum dot light region, a green quantum dot light region, and a blue quantum dot light region; the backlight includes a blue LED backlight.
Correspondingly, the utility model also provides a display device, which comprises the quantum dot backlight module; the liquid crystal display panel is arranged opposite to the quantum dot backlight module
The utility model discloses technical scheme has following advantage:
1. the technical scheme of the utility model provides a quantum dot backlight module, which comprises a quantum dot layer; the quantum dot layer comprises a quantum dot body film and a water-oxygen barrier film, and the water-oxygen barrier film is located on the whole surface of the quantum dot body film. The water-oxygen barrier film can effectively improve the water-oxygen barrier capability of the quantum dot layer, solves the failure problems of edge shrinkage, color change and the like of the quantum dot layer in a high-humidity high-temperature environment, enables the quantum dot layer to meet high-reliability requirements of high temperature, high humidity, cold and heat impact and the like, and further enables the quantum dot backlight module to meet the high-reliability requirements of high temperature, high humidity, cold and heat impact and the like.
2. Furthermore, the quantum dot body film is provided with a first extending surface and a second extending surface which are opposite, the first extending surface and the second extending surface are arranged in the light emergent direction of the quantum dot body film, and the side wall of the quantum dot body film is positioned between the first extending surface and the second extending surface and is connected with the first extending surface and the second extending surface; the water and oxygen barrier film is positioned on the first extension surface, the second extension surface and the side wall of the quantum dot body film. The water oxygen barrier film is not only located on the first extension face and the second extension face, but also located on the side wall of the quantum dot body film, so that the water oxygen barrier film can better protect the quantum dot body film and isolate the erosion of water oxygen to the quantum dot layer.
3. Further, the thickness of the water-oxygen barrier film is 5 um-500 um. The thickness of the water-oxygen barrier film is within the range, so that the quantum dot layer is guaranteed to have better water-oxygen barrier capability, the whole thickness of the quantum dot layer is not too thick, and the whole thickness of the quantum dot backlight module is not too thick.
4. The display device provided by the technical scheme of the utility model comprises the quantum dot backlight module; the liquid crystal display panel is arranged opposite to the quantum dot backlight module. The water and oxygen blocking film improves the water and oxygen blocking capacity around the quantum dot layer, solves the failure problems of edge shrinkage, color change and the like of the quantum dot layer in a high-humidity and high-temperature environment, is favorable for the display of the display device in a severe environment, and widens the display application of the display device in the industrial control and vehicle-mounted fields.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a quantum dot backlight module according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the structure of the quantum dot layer of FIG. 1;
fig. 3 is a schematic structural diagram of a display device according to another embodiment of the present invention.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
An embodiment of the present invention provides a quantum dot backlight module 10, refer to fig. 1 and fig. 2, include:
a quantum dot layer 100;
the quantum dot layer 100 includes a quantum dot bulk film 101 and a water oxygen barrier film 102, and the water oxygen barrier film 102 is located on the entire surface of the quantum dot bulk film 101.
The water and oxygen barrier film 102 coats the whole surface of the quantum dot body film 101, so that the quantum dot body film 101 is not exposed in a water and oxygen environment, the water and oxygen barrier film 102 can effectively improve the water and oxygen blocking capability of the quantum dot layer 100, the failure problems of edge shrinkage, color change and the like of the quantum dot layer 100 in a high-humidity high-temperature environment are solved, the quantum dot layer 100 meets the high-reliability requirements of high temperature, high humidity, cold and hot shock and the like, and the quantum dot backlight module meets the high-reliability requirements of high temperature, high humidity, cold and hot shock and the like.
It should be noted that fig. 2 separates the water oxygen barrier film 102 from the quantum dot bulk film 101 for convenience of illustration, but actually the water oxygen barrier film 102 is in contact with the quantum dot bulk film 101.
The quantum dot body film 101 is provided with a first extending surface and a second extending surface which are opposite to each other, the first extending surface and the second extending surface are arranged in the light emitting direction of the quantum dot body film 101, and the side wall of the quantum dot body film 101 is located between the first extending surface and the second extending surface and connected with the first extending surface and the second extending surface. The water and oxygen barrier film 102 is located on the first extension plane, the second extension plane and the side wall of the quantum dot bulk film 101.
The water and oxygen barrier film 102 is not only located on the first extension surface and the second extension surface, but also located on the side wall of the quantum dot body film 101, so that the water and oxygen barrier film 102 can better protect the quantum dot body film 101 and isolate the corrosion of water and oxygen to the quantum dot layer 100.
The sidewalls of the quantum dot bulk film 101 include opposing first and second sidewalls, and opposing third and fourth sidewalls; the first side wall is connected with the third side wall and the fourth side wall respectively, and the second side wall is connected with the third side wall and the fourth side wall respectively. The water and oxygen barrier film 102 of the quantum dot bulk film 101 side wall is respectively located on the first side wall and the second side wall, and the third side wall and the fourth side wall. In this embodiment, the first extension surface and the second extension surface of the quantum dot bulk film 101 are both rectangular. In other embodiments, the shape of the first and second extending surfaces is other shapes.
The water-oxygen barrier film 102 is not only located on the first extension surface and the second extension surface, but also located on the side wall of the quantum dot body film, so that the water-oxygen barrier film can better protect the quantum dot body film 101 and isolate the corrosion of water and oxygen to the quantum dot layer 100.
The sum of the thickness of the quantum dot bulk film 101 and the thickness of the water oxygen barrier film 102 which is 2 times of the thickness is 150 to 650 micrometers. That is, the sum of the thickness of the water oxygen barrier film 102 on the first extension plane of the quantum dot bulk film 101, the thickness of the water oxygen barrier film 102 on the second extension plane, and the thickness of the quantum dot bulk film 101 is 150 to 650 micrometers.
In one embodiment, the water oxygen barrier film 102 has a thickness of 5um to 500 um. If the thickness of the water oxygen barrier film 102 is greater than 500 um. The thickness of the water and oxygen barrier film 102 is within this range, which not only ensures that the quantum dot layer 100 has better water and oxygen barrier capability, but also prevents the whole thickness of the quantum dot layer 100 from being too thick and the whole thickness of the quantum dot backlight module from being too thick.
The water oxygen barrier film 102 is an organic water oxygen barrier film. Specifically, the water oxygen barrier film 102 is a Parylene water oxygen barrier film, i.e., a Parylene film.
The Parylene film is a protective high polymer material, the Parylene film is named as Parylene in the Chinese name, the Parylene film can be deposited in a vacuum gas phase mode, the transparent insulating coating which is free of pinholes and uniform in thickness can be formed on the inner portion and the bottom portion of the element and around the Parylene film due to good penetrating force of active molecules of the Parylene film, a complete high-quality protective coating is provided for the element, and damage of acid, alkali, salt mist, mold and various corrosive gas pieces is resisted, and the Parylene film is not liquid, so that aggregation cannot occur in the coating process.
The coating process of the water oxygen barrier film 102 comprises the following steps: putting the powdered nano raw material into the evaporating chamber of vacuum nano coating equipment, evaporating to obtain gaseous molecules at high temp. > 100 deg.C, and vacuum (1.0 ANG 10)－2torr) and then cracking the gaseous nano molecules with the particle size of less than 10nm into monomers with reaction activity at high temperature (more than 500 ℃) in the cracking chamber, and enabling the active monomers to enter a normal temperature region and to be polymerized again with the monomers to form a compact nano film layer without pinholes, namely the water-oxygen barrier film 102.
The quantum dot backlight module 10 further includes: a backlight 120; a reflective layer 130; the quantum dot layer 100 is disposed on one side in the light exit direction of the backlight 120; the backlight 120 is located between the quantum dot layer 100 and the reflective layer 130.
In one embodiment, the quantum dot bulk film 101 comprises a number of quantum dot light regions, including a red quantum dot light region, a green quantum dot light region, and a blue quantum dot light region; the backlight 120 comprises a blue LED backlight.
Accordingly, another embodiment of the present invention further provides a display device, referring to fig. 3, including the quantum dot backlight module 10; the liquid crystal display device comprises a liquid crystal display panel 20, wherein the liquid crystal display panel 20 and the quantum dot backlight module are oppositely arranged 10.
The liquid crystal display panel 20 comprises a display panel body 22 and a polarizing plate 21, wherein the polarizing plate 21 is positioned between the quantum dot backlight module 10 and the display panel body 22. The display panel body 22 includes: the liquid crystal display panel comprises a color filter, a liquid crystal layer and a TFT array layer, wherein the liquid crystal layer is positioned between the color filter and the TFT array layer. The TFT array layer faces the quantum dot backlight module 10, and the color filter faces away from the quantum dot backlight module 10.
The display device provided by the embodiment comprises the quantum dot backlight module of the embodiment; the liquid crystal display panel is arranged opposite to the quantum dot backlight module. The water and oxygen blocking film improves the water and oxygen blocking capacity around the quantum dot layer, solves the failure problems of edge shrinkage, color change and the like of the quantum dot layer in a high-humidity and high-temperature environment, is favorable for the display of the display device in a severe environment, and widens the display application of the display device in the industrial control and vehicle-mounted fields.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (10)
1. A quantum dot backlight module is characterized by comprising:
a quantum dot layer;
the quantum dot layer comprises a quantum dot body film and a water-oxygen barrier film, and the water-oxygen barrier film is located on the whole surface of the quantum dot body film.
2. The quantum dot backlight module of claim 1, wherein the quantum dot body film has a first extending surface and a second extending surface opposite to each other, the first extending surface and the second extending surface are arranged in a light emitting direction of the quantum dot body film, and a sidewall of the quantum dot body film is located between the first extending surface and the second extending surface and connected to the first extending surface and the second extending surface;
the water and oxygen barrier film is positioned on the first extension surface, the second extension surface and the side wall of the quantum dot body film.
3. The quantum dot backlight module of claim 2, wherein the sidewalls of the quantum dot body film comprise opposing first and second sidewalls, and opposing third and fourth sidewalls; the first side wall is respectively connected with the third side wall and the fourth side wall, and the second side wall is respectively connected with the third side wall and the fourth side wall;
the water and oxygen barrier film of the quantum dot body film side wall is respectively positioned on the first side wall and the second side wall, and the third side wall and the fourth side wall.
4. The quantum dot backlight module of claim 1, wherein the sum of the thickness of the quantum dot bulk film and the thickness of the water and oxygen barrier film which is 2 times the thickness of the quantum dot bulk film is 150 to 650 micrometers.
5. The quantum dot backlight module of claim 1 or 4, wherein the thickness of the water and oxygen barrier film is 5-500 um.
6. The quantum dot backlight module of claim 1, wherein the water oxygen barrier film is an organic water oxygen barrier film.
7. The quantum dot backlight module of claim 6, wherein the water and oxygen barrier film is a parylene water and oxygen barrier film.
8. The quantum dot backlight module of claim 1, further comprising: a backlight source; a reflective layer; the quantum dot layer is arranged on one side of the backlight source in the light emergent direction; the backlight is located between the quantum dot layer and the reflective layer.
9. The quantum dot backlight module of claim 8, wherein the quantum dot bulk film comprises a plurality of quantum dot light regions, the plurality of quantum dot light regions comprising a red quantum dot light region, a green quantum dot light region, and a blue quantum dot light region; the backlight includes a blue LED backlight.
10. A display device, comprising the quantum dot backlight module of any one of claims 1 to 9; the liquid crystal display panel is arranged opposite to the quantum dot backlight module.
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| CN202023123875.0U CN214011689U (en) | 2020-12-22 | 2020-12-22 | Quantum dot backlight module and display device |
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| CN202023123875.0U CN214011689U (en) | 2020-12-22 | 2020-12-22 | Quantum dot backlight module and display device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113744626A (en) * | 2021-08-26 | 2021-12-03 | 常州亚玛顿股份有限公司 | Quantum dot diffusion plate, backlight module and display device |
| CN114187834A (en) * | 2021-12-10 | 2022-03-15 | 深圳市云湖电子科技有限公司 | Vehicle-mounted display screen with quantum dot backlight source |
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2020
- 2020-12-22 CN CN202023123875.0U patent/CN214011689U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113744626A (en) * | 2021-08-26 | 2021-12-03 | 常州亚玛顿股份有限公司 | Quantum dot diffusion plate, backlight module and display device |
| CN114187834A (en) * | 2021-12-10 | 2022-03-15 | 深圳市云湖电子科技有限公司 | Vehicle-mounted display screen with quantum dot backlight source |
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