CN214067532U - Direct type backlight module and display - Google Patents
Direct type backlight module and display Download PDFInfo
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- CN214067532U CN214067532U CN202022042265.1U CN202022042265U CN214067532U CN 214067532 U CN214067532 U CN 214067532U CN 202022042265 U CN202022042265 U CN 202022042265U CN 214067532 U CN214067532 U CN 214067532U
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Abstract
The utility model discloses a direct type backlight module and a display, wherein the direct type backlight module comprises a substrate; a backlight disposed on the substrate; the substrate is coated with a protective layer of the backlight source; the diffusion layer covers the protective layer, and the contact surface of the protective layer and the diffusion layer is free of an air interlayer. The utility model provides a technical scheme sets up the protective layer on the backlight, then sets up the diffusion layer on the protective layer to need not to set up support and cavity in straight following formula backlight unit, can effectually reduce straight following formula backlight unit's thickness, just the utility model provides a straight following formula backlight unit avoids appearing because of there is the inhomogeneous phenomenon of light-emitting that the local air intermediate layer leads to between protective layer and the diffusion layer, thereby the utility model provides a straight following formula backlight unit has that thickness is little, the light-emitting is even, advantage that light-emitting efficiency is high, is favorable to straight following formula backlight unit in the application that shows technical field.
Description
Technical Field
The utility model relates to a show technical field, especially relate to a straight following formula backlight unit and display.
Background
With the development of display technology, liquid crystal display devices are applied to various electronic products, and liquid crystals of the liquid crystal display devices do not have a light-emitting characteristic, so that in order to display brightness of the liquid crystal display devices, a backlight module is required to be arranged for the liquid crystal display devices, and the backlight module includes a direct type backlight module.
At present, most of the conventional direct type backlight modules comprise a substrate, a bracket, a backlight source, a diffusion plate and the like, wherein a cavity is formed between the diffusion plate and the backlight source, and the existence of the cavity enables the backlight module to have a certain thickness, usually 10mm to 25mm, so that the use of the conventional direct type backlight module in the liquid crystal display device with the requirement on the volume is limited.
SUMMERY OF THE UTILITY MODEL
The utility model provides a straight following formula backlight unit and display, through with the protective layer setting on the backlight, then set up the diffuse layer on the protective layer to need not to set up support and cavity in backlight unit, can effectually reduce straight following formula backlight unit's thickness, and through the air intermediate layer of control protective layer with the diffuse layer contact surface, make this straight following formula backlight unit light-emitting even, look to imitate better, be favorable to straight following formula backlight unit in the application that shows technical field.
In a first aspect, the utility model provides a straight following formula backlight unit, include:
a substrate;
a backlight disposed on the substrate;
a protective layer for covering the backlight source on the substrate;
the diffusion layer covers the protective layer, and the contact surface of the protective layer and the diffusion layer is free of an air interlayer.
Preferably, the first and second electrodes are formed of a metal,
the protective layer comprises a first refraction layer and a second refraction layer coated on the upper surface of the first refraction layer.
Preferably, the first and second electrodes are formed of a metal,
the refractive index range of the second refraction layer is 1.4-1.6;
the diffusion layer has a refractive index in the range of 1.49 to 1.59.
Preferably, the first and second electrodes are formed of a metal,
the reflectivity of the substrate is greater than or equal to 83%.
Preferably, the first and second electrodes are formed of a metal,
the thickness range of the substrate is 0.2 mm-1.5 mm.
Preferably, the first and second electrodes are formed of a metal,
the thickness range of the protective layer is 0.1 mm-1.5 mm.
Preferably, the first and second electrodes are formed of a metal,
the direct type backlight module also comprises a fluorescent powder layer;
the fluorescent powder layer covers the backlight source on the substrate;
the protective layer covers the fluorescent powder layer on the substrate.
Preferably, the first and second electrodes are formed of a metal,
the fluorescent powder layer is of a layered structure, and the fluorescent powder layer coated between the backlight sources is an integral body.
Preferably, the first and second electrodes are formed of a metal,
the fluorescent powder layer is of a block structure, and the fluorescent powder layers wrapped between the adjacent backlight sources are not connected.
Preferably, the first and second electrodes are formed of a metal,
the direct type backlight module also comprises a quantum dot layer;
the quantum dot layer is covered on the diffusion layer.
Preferably, the first and second electrodes are formed of a metal,
the protective layer is made of transparent materials.
Preferably, the first and second electrodes are formed of a metal,
the protective layer is a transparent material mixed with fluorescent powder and/or light diffusion powder in a designated area.
In a second aspect, the present invention provides a display, including, as in the first aspect, a direct type backlight module.
The utility model provides a straight following formula backlight unit and display. This backlight unit comprises base plate, backlight, protective layer and diffusion barrier, and wherein the backlight is installed on the base plate, sets up the protective layer of cladding backlight on the base plate to directly set up the diffusion barrier on the protective layer, make need not to set up support and cavity in straight following formula backlight unit, thickness that can effectual reduction straight following formula backlight unit, the light that simultaneously sent at the backlight with all directly cover the protective layer all around can avoid the light-emitting efficiency phenomenon that the total reflection of backlight leads to because of the air is lower. Further, when setting up the diffusion layer, if can not laminate closely completely between protective layer and the diffusion layer, there is the air intermediate layer in the part, can influence the evenly distributed of light energy, it is inhomogeneous to appear wholly looking to imitate, shadow and colour difference scheduling problem, and the utility model provides an among the straight following formula backlight unit, when setting up protective layer and diffusion layer, need guarantee that the protective layer all does not have the air intermediate layer with the contact surface of diffusion layer to reach the effect of even light-emitting. To sum up, the utility model provides a straight following formula backlight unit has that thickness is little, the light-emitting is even, advantage that light-emitting efficiency is high, is favorable to straight following formula backlight unit in the application that shows technical field.
Drawings
In order to more clearly illustrate the embodiments or prior art solutions of the present invention, the drawings needed to be used in the description of the embodiments or prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural view of a first direct type backlight module according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a second direct-type backlight module according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a third direct-type backlight module according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a fourth direct type backlight module according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a fifth direct-type backlight module according to an embodiment of the present invention;
fig. 6 is a schematic structural view of a sixth direct type backlight module according to an embodiment of the present invention;
wherein, in the figures, the respective reference numerals:
1-a substrate;
2-a backlight source;
3-a protective layer;
4-a diffusion layer;
5-a first refractive layer;
6-a second refractive layer;
7-phosphor layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments and the corresponding drawings. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. 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.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly or indirectly secured to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positions based on the orientations or positions shown in the drawings, and are for convenience of description only and not to be construed as limiting the technical solution. The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.
In a first aspect, as shown in fig. 1, the present embodiment provides a direct type backlight module, including:
a substrate 1; a backlight 2 disposed on the substrate 1; a protective layer 3 for covering the backlight source 2 is arranged on the substrate 1; the diffusion layer 4 covers the protective layer 3, and the contact surface of the protective layer 3 and the diffusion layer 4 is free of an air interlayer.
The direct type backlight module shown in fig. 1 is composed of a substrate 1, a backlight source 2, a protective layer 3 and a diffusion layer 4, wherein the backlight source 2 is installed on the substrate 1, the protective layer 3 covering the backlight source 2 is arranged on the substrate 1, and the diffusion layer 4 is directly arranged on the protective layer 3, so that a support and a cavity are not required to be arranged in the direct type backlight module, the thickness of the direct type backlight module can be effectively reduced, and meanwhile, the lower light emitting efficiency phenomenon caused by the total reflection of the air of the light emitted by the backlight source 2 can be avoided by directly covering the protective layer 3 on the upper surface and the periphery of the backlight source 2. Further, when setting up diffusion layer 4, if can not laminate closely completely between protective layer 3 and diffusion layer 4, there is the air intermediate layer locally, can influence the evenly distributed of light energy, it is inhomogeneous to appear wholly looking to imitate, shadow and colour difference scheduling problem, and the utility model provides an among the straight following formula backlight unit, when setting up protective layer 3 and diffusion layer 4, need guarantee that protective layer 3 and diffusion layer 4's contact surface all does not have the air intermediate layer to reach the effect of even light-emitting. To sum up, the utility model provides a straight following formula backlight unit has that thickness is little, the light-emitting is even, advantage that light-emitting efficiency is high, is favorable to straight following formula backlight unit in the application that shows technical field.
Specifically, the backlight source 2 mentioned in this embodiment includes light sources such as an LED (light emitting diode), a CCFL (cold cathode fluorescent lamp), and the like, and is particularly suitable for a direct-type LED backlight module using the LED as the backlight source 2, where the LED may be a blue LED, a white LED, a green LED, or the like, and a user may select the light sources according to his/her actual needs. In a possible implementation manner, if the blue LED is used as a backlight source, the direct-type backlight module further includes a quantum dot layer, and the quantum dot layer covers the diffusion layer 4.
As shown in fig. 2, in an embodiment of the present invention, the protection layer 3 includes a first refraction layer 5 and a second refraction layer 6 coated on an upper surface of the first refraction layer 5.
In the above embodiment, the protective layer 3 includes the first refractive layer 5 and the second refractive layer 6, that is, the first refractive layer 5 directly covering the backlight 2 is disposed on the substrate 1, the second refractive layer 6 is coated on the first refractive layer 5, and the diffusion layer 4 is covered on the second refractive layer 6, where no air interlayer exists at any position in a contact surface between an upper surface of the second refractive layer 6 of the protective layer 3 and a lower surface of the diffusion layer 4. Specifically, the thickness of the first refractive layer 5 is greater than that of the second refractive layer 6, and the second refractive layer 6 is only a thin layer coated on the first refractive layer 5. In this embodiment, the substrate 1, the backlight 2 and the first refractive layer 5 form a backlight panel, and the second refractive layer 6 can make the backlight panel and the diffusion layer 4 closely adhere to each other when the display is mounted. When the direct type backlight module provided by the embodiment is manufactured, the backlight source 2 is firstly arranged on the substrate 1, then the transparent material is solidified and packaged on the substrate 1 to serve as the first refraction layer 5, the second refraction layer 6 is coated on the first refraction layer 5, and the diffusion layer 4 is arranged on the second refraction layer 6 when the second refraction layer 6 is not completely solidified, so that the thin second refraction layer 6 is filled between the first refraction layer 5 and the diffusion layer 4. Therefore, the direct type backlight module provided by the embodiment can be simply and conveniently manufactured.
In an embodiment of the present invention, the refractive index of the second refractive layer 6 ranges from 1.4 to 1.6; the diffusion layer has a refractive index in the range of 1.49 to 1.59. The refractive index range of the second refraction layer 6 is arranged between the first refraction layer 5 and the diffusion layer 4 or close to the first refraction layer and the diffusion layer, so that the difference of the refractive indexes of all layers on a light transmission path can be reduced as much as possible, the total reflection effect is effectively reduced, and the light extraction efficiency is increased. Specifically, when selecting the material of the second refraction layer 6, the material of the second refraction layer 6 needs to have elasticity and ductility in addition to the material of the second refraction layer 6, and when being attached to a display assembly, the second refraction layer 6 having elasticity and ductility can enable the backlight lamp panel to be closely attached to the diffusion plate or the diffusion film.
In an embodiment of the present invention, the thickness range of the substrate 1 is 0.2mm to 1.5mm, for example, the thickness of the substrate 1 is 0.2mm, 0.4mm, 0.6mm, 0.8mm, 1.0mm or 1.5mm, and the thickness of the direct-type backlight module is adjusted to a certain degree by controlling the thickness range of the substrate 1. Further, the thickness range of the protective layer 3 includes 0.1mm to 1.5mm, for example, the thickness of the protective layer 3 is 0.1mm, 0.5mm, 0.7mm, 1.0mm or 1.5mm, and the thickness of the direct type backlight module can be significantly reduced by replacing the cavity with the thickness of 10mm to 25mm in the conventional direct type backlight module with the protective layer 3 with the thickness of 0.1mm to 1.5 mm. Further, when the protective layer is composed of the first refractive layer 5 and the second refractive layer 6, the thickness of the first refractive layer 5 is much larger than that of the second refractive layer 6, and the thickness of the second refractive layer 6 is set, for example, to 100 μm or more in accordance with the roughness of the lower surfaces of the first refractive layer 5 and the diffusion layer 4. Of course, the thickness of the substrate 1, the thickness of the protective layer 3, and the thickness of the second refraction layer 6 may be set according to a specific application scenario.
In an embodiment of the present invention, the refractive index of the substrate material and the epitaxial material of the backlight 2 is greater than or equal to 1.7. Further, the reflectivity of the substrate 1 is greater than or equal to 83%, preferably, the reflectivity of the substrate 1 is greater than or equal to 95%, and the substrate 1 has a higher reflectivity, which means that the substrate 1 can reflect more light incident to the substrate 1, so as to increase the utilization efficiency of light, reduce the loss of light energy, and achieve the effect of reducing energy consumption.
As shown in fig. 3 to 5, in an embodiment of the present invention, the direct-type backlight module further includes a phosphor layer 7; the fluorescent powder layer 7 covers the backlight source on the substrate; the protective layer covers the phosphor layer 7 on the substrate.
In the above embodiment, the fluorescent powder layer 7 directly contacting with the backlight source is provided, so that white light can be effectively obtained, and the light quality and color rendering of the backlight source can be improved. In one possible implementation manner, as shown in fig. 3 and 4, the phosphor layers 7 are continuously arranged, and present a layered structure, and are used for directly covering the backlight sources 2 on the substrate 1, and the phosphor layers covered between the backlight sources 2 are integrated; in another possible implementation manner, as shown in fig. 5, the phosphor layers 7 are intermittently and independently arranged, and present a block structure, which is used for independently and directly coating the backlight sources 2 on the substrate 1, and the phosphor layers 7 coated between adjacent backlight sources are not connected.
Specifically, when manufacturing the direct-type backlight module shown in fig. 4, the backlight 2 is installed on the substrate 1, a part of the transparent material is added with phosphor powder and uniformly mixed, and is covered around the substrate 1 and the backlight 2 to be cured to be the phosphor powder layer 7, then another part of the transparent material is covered on the phosphor powder layer 7 and is cured to be the first refraction layer 5, the first refraction layer 5 is further thinly coated with the second refraction layer 6, a light diffusion plate is placed before the second refraction layer 6 is not completely cured, and the second refraction layer 6 is cured after air is removed. The direct type backlight module as shown in fig. 5 is prepared by mounting a backlight 2 on a substrate 1, adding phosphor powder to a part of transparent material, mixing uniformly, printing the mixture around the backlight 2 by a mold such as a steel mesh or a silk screen, curing to form an independent phosphor layer 7, adding light diffusing agent to another part of transparent material, mixing uniformly, covering each independent phosphor layer, curing to form a first refraction layer 5, further thinly coating a second refraction layer 6 material on the first refraction layer 5, placing a light diffusing plate before the second refraction layer 6 is not completely cured, and curing the second refraction layer 6 after removing air.
In an embodiment of the present invention, the protective layer 3 is made of a transparent material, wherein the transparent material includes PC (polycarbonate), PMMA (polymethyl methacrylate) and other materials with high light transmittance. Preferably, the transparent material comprises silica gel or epoxy glue, and the silica gel and the epoxy glue have the advantages of certain softness, fluidity, high temperature resistance and the like under the condition of better light transmittance, so that the aim of easy manufacture is fulfilled.
In one embodiment of the present invention, the protective layer 3 is a transparent material mixed with phosphor and/or light diffusion powder in a designated area. The addition of the fluorescent powder can effectively obtain white light and provide light quality; the light diffusion powder is added to help the light energy to be uniformly dispersed, so that the effect of improving the overall brightness and uniform chromaticity is achieved. Light diffusing powders may include, but are not limited to, titanium dioxide microparticles、One or more of silicon dioxide particles, organic silicon particles and silica gel or resin, and the adding proportion of the light diffusion powder can be carried out according to the actual situationAnd (6) adjusting. Specifically, the designated region may be the entire region within the protective layer 3, and when the protective layer 3 is composed of the first refractive layer 5 and the second refractive layer 6, the designated region may also be the first refractive layer 5. In one possible implementation, when the fluorescent layer 7 exists in the direct type backlight module, the light diffusion powder is uniformly arranged in the first refraction layer 5 (as shown in fig. 5); in another possible implementation manner, the direct type backlight module does not have the fluorescent layer 7, and at this time, fluorescent powder, light diffusion powder or a mixture of the fluorescent powder and the light diffusion powder can be uniformly distributed in the first refractive layer 5 (as shown in fig. 6).
In a second aspect, the present embodiment provides a display, including the direct type backlight module according to any of the above embodiments, wherein the display may be a television display, a computer display, or the like.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. A direct type backlight module is characterized by comprising:
a substrate;
a backlight disposed on the substrate;
a protective layer for covering the backlight source on the substrate;
the diffusion layer covers the protective layer, and the contact surface of the protective layer and the diffusion layer is free of an air interlayer.
2. The direct type backlight module according to claim 1,
the protective layer comprises a first refraction layer and a second refraction layer coated on the upper surface of the first refraction layer.
3. The direct type backlight module according to claim 2,
the refractive index range of the second refraction layer is 1.4-1.6;
the diffusion layer has a refractive index in the range of 1.49 to 1.59.
4. The direct type backlight module according to claim 1,
the reflectivity of the substrate is greater than or equal to 83%.
5. The direct type backlight module according to claim 1,
the thickness range of the substrate is 0.2 mm-1.5 mm;
and/or the thickness range of the protective layer is 0.1 mm-1.5 mm.
6. The direct type backlight module according to claim 1, further comprising a phosphor layer;
the fluorescent powder layer covers the backlight source on the substrate;
the protective layer covers the fluorescent powder layer on the substrate.
7. The direct type backlight module according to claim 6,
the fluorescent powder layer is of a layered structure, and the fluorescent powder layer coated between the backlight sources is an integral body;
or the fluorescent powder layers are in a block structure, and the fluorescent powder layers wrapped between the adjacent backlight sources are not connected.
8. The direct type backlight module according to claim 1, further comprising a quantum dot layer;
the quantum dot layer is covered on the diffusion layer.
9. A display device comprising the direct type backlight module according to any one of claims 1 to 8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022042265.1U CN214067532U (en) | 2020-09-17 | 2020-09-17 | Direct type backlight module and display |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022042265.1U CN214067532U (en) | 2020-09-17 | 2020-09-17 | Direct type backlight module and display |
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| CN214067532U true CN214067532U (en) | 2021-08-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023165212A1 (en) * | 2022-03-01 | 2023-09-07 | 惠州视维新技术有限公司 | Backlight module and direct-lit backlight device |
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2020
- 2020-09-17 CN CN202022042265.1U patent/CN214067532U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023165212A1 (en) * | 2022-03-01 | 2023-09-07 | 惠州视维新技术有限公司 | Backlight module and direct-lit backlight device |
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