CN112162431A - Direct type backlight module, direct type backlight module manufacturing method and display - Google Patents
Direct type backlight module, direct type backlight module manufacturing method and display Download PDFInfo
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- CN112162431A CN112162431A CN202010978648.1A CN202010978648A CN112162431A CN 112162431 A CN112162431 A CN 112162431A CN 202010978648 A CN202010978648 A CN 202010978648A CN 112162431 A CN112162431 A CN 112162431A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133608—Direct backlight including particular frames or supporting means
Abstract
The invention discloses a direct type backlight module, a direct type backlight module manufacturing method 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. According to the technical scheme provided by the invention, the protective layer is arranged on the backlight source, and then the diffusion layer is arranged on the protective layer, so that a bracket 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 the direct type backlight module provided by the invention avoids the phenomenon of uneven light emission caused by the existence of a local air interlayer between the protective layer and the diffusion layer, so that the direct type backlight module provided by the invention has the advantages of small thickness, even light emission and high light emission efficiency, and is beneficial to the application of the direct type backlight module in the technical field of display.
Description
Technical Field
The invention relates to the technical field of display, in particular to a direct type backlight module, a manufacturing method of the direct type backlight module and a 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.
Disclosure of Invention
The invention provides a direct type backlight module, a direct type backlight module manufacturing method and a display, wherein a protective layer is arranged on a backlight source, and then a diffusion layer is arranged on the protective layer, so that a bracket and a cavity are not required to be arranged in the backlight module, the thickness of the direct type backlight module can be effectively reduced, and the direct type backlight module has uniform light emitting and better visual effect by controlling an air interlayer on the contact surface of the protective layer and the diffusion layer, and is beneficial to the application of the direct type backlight module in the technical field of display.
In a first aspect, the present invention provides a direct type backlight module, including:
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 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 method for manufacturing a direct-type backlight module, including:
mounting a backlight on a substrate;
arranging a protective layer covering the backlight source on the substrate;
before the upper surface of the protective layer is not completely cured, a diffusion layer is arranged on the protective layer, and after no air interlayer exists on the contact surface of the protective layer and the diffusion layer, the upper surface of the protective layer is cured.
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;
then, the disposing a protection layer covering the backlight source on the substrate includes:
arranging a first refraction layer wrapping the backlight source on the substrate;
coating a second refraction layer on the first refraction layer;
before the upper surface of protective layer is not completely cured, set up the diffusion layer on the protective layer, treat the protective layer with after the contact surface of diffusion layer all has no air intermediate layer, the solidification the upper surface of protective layer includes:
before the second refraction layer is not completely cured, a diffusion layer is arranged on the second refraction layer, and after the contact surface of the second refraction layer and the diffusion layer is free of an air interlayer, the second refraction layer is cured.
In a third aspect, the present invention provides a display device, including the direct type backlight module according to the first aspect.
The invention provides a direct type backlight module, a manufacturing method of the direct type backlight module and a 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. Furthermore, when the diffusion layer is arranged, if the protective layer and the diffusion layer cannot be completely and closely attached, an air interlayer exists locally, which affects the uniform distribution of light energy, and causes the problems of non-uniform overall visual effect, dark shadow, color difference and the like. In summary, the direct type backlight module provided by the invention has the advantages of small thickness, uniform light emission and high light emission efficiency, and is beneficial to the application of the direct type backlight module in the technical field of display.
Drawings
In order to more clearly illustrate the embodiments or the prior art solutions of the present invention, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a first direct-type backlight module according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a second direct-type backlight module according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram 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 diagram 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 more apparent, the technical solutions of the present invention will be described in detail and completely with reference to the following embodiments and accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within 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. Furthermore, when the diffusion layer 4 is disposed, if the protective layer 3 and the diffusion layer 4 cannot be completely and closely attached to each other, an air interlayer exists locally, which may affect the uniform distribution of light energy, and cause the problems of non-uniform overall visual effect, dark shadows, color difference, etc. in the direct-type backlight module provided by the present invention, it is necessary to ensure that the contact surface between the protective layer 3 and the diffusion layer 4 does not have an air interlayer when the protective layer 3 and the diffusion layer 4 are disposed, thereby achieving the effect of uniform light emission. In summary, the direct type backlight module provided by the invention has the advantages of small thickness, uniform light emission and high light emission efficiency, and is beneficial to the application of the direct type backlight module in the technical field of display.
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 one embodiment of the present invention, the protective layer 3 includes a first refractive layer 5 and a second refractive layer 6 coated on an upper surface of the first refractive 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 one embodiment of the present invention, the refractive index of the second refraction 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 invention, the thickness of the substrate 1 is in a range of 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 extent 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 one 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 that the utilization efficiency of light is increased, the loss of light energy is reduced, and the effect of reducing energy consumption can be achieved.
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 separately 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 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 adjusted according to actual conditions. 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 method for manufacturing a direct-type backlight module, including:
mounting a backlight on a substrate;
arranging a protective layer covering the backlight source on the substrate;
before the upper surface of the protective layer is not completely cured, a diffusion layer is arranged on the protective layer, and after no air interlayer exists on the contact surface of the protective layer and the diffusion layer, the upper surface of the protective layer is cured.
In the above embodiment, the protective layer covering the backlight source is disposed on the backlight source, the protective layer is used to replace a cavity in a traditional direct type backlight module, the thickness of the direct type backlight module is effectively reduced, the light extraction rate of the backlight source is provided, then when the diffusion layer is disposed, before the upper surface of the protective layer is not completely cured, namely, the diffusion layer is disposed on the protective layer, air can be effectively removed, the effect that no air interlayer exists between the contact surfaces of the protective layer 3 and the diffusion layer 4 is achieved, and then the upper surface of the protective layer is cured. Therefore, the direct type backlight module with small thickness, uniform light emitting and high light emitting efficiency is obtained.
In one embodiment of the present invention, the protective layer includes a first refractive layer and a second refractive layer coated on an upper surface of the first refractive layer;
then, the disposing a protection layer covering the backlight source on the substrate includes:
arranging a first refraction layer wrapping the backlight source on the substrate;
coating a second refraction layer on the first refraction layer;
before the upper surface of protective layer is not completely cured, set up the diffusion layer on the protective layer, treat the protective layer with after the contact surface of diffusion layer all has no air intermediate layer, the solidification the upper surface of protective layer includes:
before the second refraction layer is not completely cured, a diffusion layer is arranged on the second refraction layer, and after the contact surface of the second refraction layer and the diffusion layer is free of an air interlayer, the second refraction layer is cured.
In the above embodiment, the protective layer is composed of the first refractive layer and the second refractive layer, and the second refractive layer is coated on the upper surface of the first refractive layer, so that when the direct-type backlight module is manufactured, the first refractive layer can be cured and packaged on the backlight source, the second refractive layer is coated on the upper surface of the first refractive layer, and when the second refractive layer is not cured completely, the diffusion layer is disposed on the upper surface of the second refractive layer, and after air is removed, the second refractive layer is cured.
In a third aspect, the present embodiment provides a display, including the direct type backlight module according to any of the above embodiments, where the display may be a television display, a computer display, or the like.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
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 any one of claims 1 to 6,
the protective layer is made of transparent material;
or the protective layer is a transparent material mixed with fluorescent powder and/or light diffusion powder in a designated area.
8. A method for preparing a direct type backlight module is characterized by comprising the following steps:
mounting a backlight on a substrate;
arranging a protective layer covering the backlight source on the substrate;
before the upper surface of the protective layer is not completely cured, a diffusion layer is arranged on the protective layer, and after no air interlayer exists on the contact surface of the protective layer and the diffusion layer, the upper surface of the protective layer is cured.
9. The method of claim 8, wherein the protective layer comprises a first refractive layer and a second refractive layer coated on an upper surface of the first refractive layer;
then, the disposing a protection layer covering the backlight source on the substrate includes:
arranging a first refraction layer wrapping the backlight source on the substrate;
coating a second refraction layer on the first refraction layer;
before the upper surface of protective layer is not completely cured, set up the diffusion layer on the protective layer, treat the protective layer with after the contact surface of diffusion layer all has no air intermediate layer, the solidification the upper surface of protective layer includes:
before the second refraction layer is not completely cured, a diffusion layer is arranged on the second refraction layer, and after the contact surface of the second refraction layer and the diffusion layer is free of an air interlayer, the second refraction layer is cured.
10. A display device, comprising the direct type backlight module as claimed in any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010978648.1A CN112162431A (en) | 2020-09-17 | 2020-09-17 | Direct type backlight module, direct type backlight module manufacturing method and display |
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| CN202010978648.1A CN112162431A (en) | 2020-09-17 | 2020-09-17 | Direct type backlight module, direct type backlight module manufacturing method and display |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113658521A (en) * | 2021-08-26 | 2021-11-16 | 业成科技（成都）有限公司 | Thin film display |
| CN115629496A (en) * | 2022-08-18 | 2023-01-20 | 京东方科技集团股份有限公司 | Backlight module, preparation method thereof and display device |
| CN115629496B (en) * | 2022-08-18 | 2024-05-17 | 京东方科技集团股份有限公司 | Backlight module, preparation method thereof and display device |
-
2020
- 2020-09-17 CN CN202010978648.1A patent/CN112162431A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113658521A (en) * | 2021-08-26 | 2021-11-16 | 业成科技（成都）有限公司 | Thin film display |
| TWI801985B (en) * | 2021-08-26 | 2023-05-11 | 大陸商業成科技（成都）有限公司 | Film display |
| CN115629496A (en) * | 2022-08-18 | 2023-01-20 | 京东方科技集团股份有限公司 | Backlight module, preparation method thereof and display device |
| CN115629496B (en) * | 2022-08-18 | 2024-05-17 | 京东方科技集团股份有限公司 | Backlight module, preparation method thereof and display device |
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