CN110471209B - Substrate, manufacturing method and display panel - Google Patents
Substrate, manufacturing method and display panel Download PDFInfo
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- CN110471209B CN110471209B CN201910752017.5A CN201910752017A CN110471209B CN 110471209 B CN110471209 B CN 110471209B CN 201910752017 A CN201910752017 A CN 201910752017A CN 110471209 B CN110471209 B CN 110471209B
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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
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133512—Light shielding layers, e.g. black matrix
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Abstract
The invention discloses a substrate, a manufacturing method and a display panel, wherein the substrate comprises a substrate base plate and a black matrix formed on the substrate base plate; the black matrix at least comprises a first shading layer and a second shading layer, the first shading layer is positioned on one side of the substrate, the second shading layer is positioned on one side of the first shading layer far away from the substrate, the refractive index of the first shading layer is smaller than that of the second shading layer and larger than that of the substrate, one side of the second shading layer close to the first shading layer comprises a microstructure, and the microstructure is a protrusion facing the substrate; the raw materials of the black matrix at least comprise carbon black, bisphenol fluorene epoxy acrylate, propylene glycol methyl ether acetate, ethyl lactate, bis (2-methoxyethyl) ether, diethylene glycol methyl ethyl ether and additives, wherein the additives at least comprise an organic silicon compound, a fluorine substituted organic matter, acrylic resin and polyethylene resin. The invention can obviously reduce the reflectivity of the substrate on the premise of not influencing the display quality of the product.
Description
Technical Field
The invention relates to the technical field of display, in particular to a substrate, a manufacturing method and a display panel.
Background
The liquid crystal display device has advantages of lightness, thinness, low power consumption, low radiation, and the like, and is widely applied to various fields. However, the display device in the prior art has the problem of high reflectivity, and light reflection is formed on the light emitting side of the display device, so that the content displayed by the display device is not visible under strong light. It is generally required to reduce the reflectance of the display device while maintaining the transmittance of the display device, thereby improving the display quality.
In the existing technical scheme for reducing the reflectivity, two 1/4 wave plates are usually added to the structure of the display panel, for example, a 1/4 wave plate is added to each of the film layer of the polarizer and the film layer of the color film substrate, although the reflectivity can be reduced, the transmittance is reduced due to the added 1/4 wave plate, so that the display quality is affected.
Therefore, it is an urgent problem to reduce the reflectivity of the display device without affecting the performance of the product.
Disclosure of Invention
In view of the foregoing, the present invention provides a substrate, a manufacturing method thereof and a display panel, which are used to reduce the reflectivity of the display device without affecting the display quality of the product.
In one aspect, the present invention provides a substrate, including a substrate base, a black matrix formed on the substrate base;
the black matrix at least comprises a first shading layer and a second shading layer, the first shading layer is positioned on one side of the substrate, the second shading layer is positioned on one side of the first shading layer far away from the substrate, wherein,
the refractive index of the first light shielding layer is smaller than that of the second light shielding layer and larger than that of the substrate, one side, close to the first light shielding layer, of the second light shielding layer comprises a microstructure, and the microstructure is a protrusion facing the substrate;
the raw materials of the black matrix at least comprise carbon black, bisphenol fluorene epoxy acrylate, propylene glycol methyl ether acetate, ethyl lactate, bis (2-methoxyethyl) ether, diethylene glycol methyl ethyl ether and additives, wherein the additives at least comprise an organic silicon compound, a fluorine substituted organic matter, acrylic resin and polyethylene resin.
In one aspect, the present invention provides a method for manufacturing a substrate, including:
providing a substrate base plate;
mixing raw materials required by a black matrix to form a black matrix material, wherein the raw materials required by the black matrix at least comprise carbon black, bisphenol fluorene epoxy acrylate, propylene glycol methyl ether acetate, ethyl lactate, bis (2-methoxyethyl) ether, diethylene glycol methyl ethyl ether and additives, and the additives at least comprise an organic silicon compound, a fluorine substituted organic matter, acrylic resin and polyethylene resin;
coating the black matrix material on the substrate to form a black matrix layer;
baking the black matrix layer to obtain a black matrix, and after baking, dividing the black matrix into a first shading layer and a second shading layer in a layering mode, wherein the first shading layer is located on one side of the substrate, the second shading layer is located on one side, far away from the substrate, of the first shading layer, and the refractive index of the first shading layer is smaller than that of the second shading layer and larger than that of the substrate.
On the other hand, the invention also provides a display panel, which comprises the substrate, a second substrate arranged opposite to the substrate, and a liquid crystal layer sandwiched between the substrate and the second substrate.
Compared with the prior art, the substrate, the manufacturing method and the display panel provided by the invention at least realize the following beneficial effects:
the black matrix in the substrate at least comprises a first shading layer and a second shading layer, wherein the first shading layer is positioned on one side of the substrate, the second shading layer is positioned on one side of the first shading layer far away from the substrate, the refractive index of the first shading layer is smaller than that of the second shading layer and larger than that of the substrate, one side of the second shading layer close to the first shading layer comprises a microstructure, and the microstructure is formed by that when a part of light rays in a bulge facing the substrate pass through the first shading layer, the refractive index of the first shading layer is smaller than that of the second shading layer and larger than that of the substrate according to the condition that r is (n1-n2)2/(n1+n2)2It is found that the reflectance at the contact interface surface between the substrate and the first light-shielding layer is low;
according to the invention, one side of the second light shielding layer, which is close to the first light shielding layer, comprises the microstructure, the microstructure is a protrusion facing the substrate, when light passing through the first light shielding layer reaches the second light shielding layer again, because the microstructure is arranged on the second light shielding layer, light rays are subjected to diffuse reflection on the surface of the microstructure, and the original mirror reflection is converted into diffuse reflection through the microstructure, so that the reflectivity can be further reduced;
the raw materials of the black matrix at least comprise carbon black, bisphenol fluorene epoxy acrylate, propylene glycol methyl ether acetate, ethyl lactate, bis (2-methoxyethyl) ether, diethylene glycol methyl ethyl ether and additives, wherein the additives at least comprise an organic silicon compound, a fluorine substituted organic matter, acrylic resin and polyethylene resin, and the components are coated on the substrate after being mixed and can be automatically divided into a first shading layer and a second shading layer when being baked;
the black matrix is originally manufactured on the substrate, so that the reflectivity can be reduced on the premise of not increasing the manufacturing process, and the sufficient light shading property can be ensured;
the invention does not need to add 1/4 wave plate, and does not affect normal display.
Of course, it is not necessary for any product in which the present invention is practiced to achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic plan view of a substrate according to the present invention;
FIG. 2 is a cross-sectional view taken along line A-A' of FIG. 1;
FIG. 3 is a cross-sectional view taken along line A-A' of FIG. 1;
FIG. 4 is a schematic view of another planar structure of the substrate provided by the present invention;
FIG. 5 is a further sectional view taken along line A-A' of FIG. 1;
FIG. 6 is a flow chart of a method for fabricating a substrate according to the present invention;
FIG. 7 is a flow chart of a method for fabricating a substrate according to another embodiment of the present invention;
fig. 8 is a schematic plan view of a display panel according to the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Referring to fig. 1 and 2, fig. 1 is a schematic plan view of a substrate according to the present invention, and fig. 2 is a cross-sectional view taken along a direction a-a' of fig. 1. The base plate 100 in fig. 1 includes a base plate 1, and black matrixes 2 formed on the base plate 1; in fig. 2, the black matrix 2 at least includes a first light shielding layer 21 and a second light shielding layer 22, the first light shielding layer 21 is located on one side of the substrate 1, the second light shielding layer 22 is located on one side of the first light shielding layer 21 away from the substrate 1, a refractive index of the first light shielding layer 21 is smaller than a refractive index of the second light shielding layer 22 and larger than a refractive index of the substrate 1, a side of the second light shielding layer 22 away from the first light shielding layer 21 includes a microstructure 23, and the microstructure 23 is a protrusion facing the substrate 1.
The raw materials of the black matrix at least comprise carbon black, bisphenol fluorene epoxy acrylate, propylene glycol methyl ether acetate, ethyl lactate, bis (2-methoxyethyl) ether, diethylene glycol methyl ethyl ether and additives, wherein the additives at least comprise an organic silicon compound, a fluorine substituted organic matter, acrylic resin and polyethylene resin.
The base substrate 1 in the present invention may be glass.
Fig. 2 shows only the case where the microstructure 23 has a curved surface curved toward the substrate board 1, but may be a microstructure of another form. Fig. 2 only shows that the microstructures 23 are closely arranged in the second light-shielding layer 22, but of course, they may not be closely arranged, and are not limited in this respect.
It is understood that an open area may be between the black matrices 2.
In fig. 2, the thickness of the first light-shielding layer 21 is different from the thickness of the second light-shielding layer 22 in a direction perpendicular to the plane of the base substrate 1, but may be the same, and is not particularly limited herein.
In the prior art, a substrate baseThe panel 1 is located on the side close to the ambient light, which is easily reflected on the surface of the black matrix 2 via the substrate 1, and the contact interface surface reflectivity is r (n1-n2) as known from the fresnel formula2/(n1+n2)2N1 and n2 are the refractive indices of the two contact interfaces. Since the difference in refractive index between the black matrix 2 and the glass is large, the reflectance is also high. The black matrix 2 plays an indispensable part of the light shielding function.
Refractive index n of the first light-shielding layer 21 in FIG. 2aRefractive index n smaller than that of the second light-shielding layer 22bWhen a part of light passes through the first light-shielding layer 21, the refractive index n of the first light-shielding layer 21 is larger than the refractive index naRefractive index n smaller than that of the second light-shielding layer 22bAnd the refractive index n of the first light-shielding layer 21aBetween the refractive indices of the base substrate 1 and the second light-shielding layer 22 according to r ═ (n1-n2)2/(n1+n2)2It is found that the reflectance at the contact interface surface between the substrate 1 and the first light-shielding layer 21 is low; on the other hand, the side of the second light shielding layer 22 close to the first light shielding layer 21 comprises the microstructure 23, the microstructure 23 is a protrusion facing the substrate 1, when the light passing through the first light shielding layer 21 reaches the second light shielding layer 22 again, because the microstructure 23 is arranged on the second light shielding layer 22, the light is diffused on the surface of the microstructure 23, the original specular reflection is converted into the diffuse reflection through the microstructure 23, and the reflectivity can be further reduced; meanwhile, the raw materials of the black matrix at least comprise carbon black, bisphenol fluorene epoxy acrylate, propylene glycol methyl ether acetate, ethyl lactate, bis (2-methoxyethyl) ether, diethylene glycol methyl ethyl ether and additives, wherein the additives at least comprise an organic silicon compound, a fluorine substituted organic matter, acrylic resin and polyethylene resin, and the components are mixed and coated on the substrate and can be automatically divided into the first shading layer 21 and the second shading layer 22 when being baked.
In addition, since the black matrix 2 of the present invention is a black matrix that should be originally formed on the substrate, the reflectance can be reduced without increasing the number of processes, and sufficient light-shielding properties can be ensured.
The substrate of the embodiment has at least the following technical effects:
in this embodiment, a portion of the light passes through the first light-shielding layer 21 due to the refractive index n of the first light-shielding layer 21aRefractive index n smaller than that of the second light-shielding layer 22bAnd the refractive index n of the first light-shielding layer 21aBetween the refractive indices of the base substrate 1 and the second light-shielding layer 22 according to r ═ (n1-n2)2/(n1+n2)2It is found that the reflectance at the contact interface surface between the base substrate 1 and the first light-shielding layer 21 is low
According to the invention, one side of the second light shielding layer 22 close to the first light shielding layer 21 comprises the microstructure 23, the microstructure 23 is a protrusion facing the substrate 1, when light passing through the first light shielding layer 21 reaches the second light shielding layer 22 again, because the microstructure 23 is arranged on the second light shielding layer 22, light rays are subjected to diffuse reflection on the surface of the microstructure 23, and the original specular reflection is converted into diffuse reflection through the microstructure 23, so that the reflectivity can be further reduced;
the raw materials of the black matrix at least comprise carbon black, bisphenol fluorene epoxy acrylate, propylene glycol methyl ether acetate, ethyl lactate, bis (2-methoxyethyl) ether, diethylene glycol methyl ethyl ether and additives, wherein the additives at least comprise an organic silicon compound, a fluorine substituted organic matter, acrylic resin and polyethylene resin, and the components are mixed and coated on the substrate and can be automatically divided into a first shading layer 21 and a second shading layer 22 when being baked.
The black matrix 2 of the present invention is a black matrix that should be originally formed on the substrate, so that the reflectance can be reduced without increasing the number of processes, and sufficient light-shielding properties can be ensured.
The invention does not need to add 1/4 wave plate, and does not affect normal display.
A large number of experiments prove that the substrate reflectivity (namely the black matrix layer with low reflection is arranged on the substrate) provided by the invention is about 5.1%, the substrate reflectivity (namely the conventional black matrix layer is arranged on the substrate) in the prior art is about 6.6%, and the substrate reflectivity is reduced by about 22.8% obviously.
With continued reference to fig. 2, in some alternative embodiments, the black matrix is formed by mixing the following raw materials in parts by weight:
the additives include organosilicon compounds, fluorine-substituted organics, acrylic resins, and polyethylene resins.
Optionally, in an embodiment provided by the present invention, the black matrix is prepared by mixing the following raw materials in parts by weight:
optionally, in an embodiment provided by the present invention, the black matrix is prepared by mixing the following raw materials in parts by weight:
optionally, in an embodiment provided by the present invention, the black matrix is prepared by mixing the following raw materials in parts by weight:
optionally, in an embodiment provided by the present invention, the black matrix is prepared by mixing the following raw materials in parts by weight:
optionally, in an embodiment provided by the present invention, the black matrix is prepared by mixing the following raw materials in parts by weight:
optionally, in an embodiment provided by the present invention, the black matrix is prepared by mixing the following raw materials in parts by weight:
the raw materials of the black matrix at least comprise carbon black, bisphenol fluorene epoxy acrylate, propylene glycol monomethyl ether acetate, ethyl lactate, bis (2-methoxyethyl) ether, diethylene glycol methyl ethyl ether and additives, wherein the additives at least comprise an organic silicon compound, a fluorine substituted organic matter, acrylic resin and polyethylene resin, the black matrix which is mixed according to the weight part principle can be automatically divided into a first shading layer 21 and a second shading layer 22 when being coated on a substrate and baked, and partial light passes through the first shading layer 21 due to the refractive index n of the first shading layer 21aRefractive index n smaller than that of the second light-shielding layer 22bAnd the refractive index n of the first light-shielding layer 21aBetween the refractive indices of the base substrate 1 and the second light-shielding layer 22 according to r ═ (n1-n2)2/(n1+n2)2It is found that the reflectance at the contact interface surface between the base substrate 1 and the first light-shielding layer 21 is low.
The microstructure has a curved surface bent toward the substrate base plate, or the microstructure is in a pyramid shape. Referring to fig. 2 and 3, fig. 3 is a cross-sectional view taken along a direction a-a' in fig. 1, in fig. 2, the microstructure 23 has a curved surface curved toward the substrate base 1, and in fig. 3, the microstructure 23 has a pyramid shape.
In fig. 3, the black matrix 2 at least includes a first light shielding layer 21 and a second light shielding layer 22, the first light shielding layer 21 is located on one side of the substrate 1, the second light shielding layer 22 is located on one side of the first light shielding layer 21 away from the substrate 1, the refractive index of the first light shielding layer 21 is smaller than the refractive index of the second light shielding layer 22 and larger than the refractive index of the substrate 1, the side of the second light shielding layer 22 close to the first light shielding layer 21 includes a microstructure 23, and the microstructure 23 in fig. 3 is a pyramid.
In the invention, the side of the second light shielding layer 22 close to the first light shielding layer 21 comprises the microstructure 23, the microstructure 23 is a protrusion facing the substrate 1, when the light passing through the first light shielding layer 21 reaches the second light shielding layer 22 again, the microstructure 23 in fig. 2 or fig. 3 is arranged on the second light shielding layer 22, so that the light is diffused on the surface of the microstructure 23, and the original specular reflection is converted into the diffuse reflection through the microstructure 23, thereby further reducing the reflectivity.
The maximum height of the microstructure 23 in the first direction X, which is a direction perpendicular to the plane of the substrate base, is 0.1 to 2 μm.
With reference to fig. 2, the black matrix 2 at least includes a first light shielding layer 21 and a second light shielding layer 22, the first light shielding layer 21 is located on one side of the substrate 1, the second light shielding layer 22 is located on one side of the first light shielding layer 21 away from the substrate 1, a refractive index of the first light shielding layer 21 is smaller than a refractive index of the second light shielding layer 22 and larger than a refractive index of the substrate 1, one side of the second light shielding layer 22 close to the first light shielding layer 21 includes a microstructure 23, a maximum height of the microstructure in the first direction is a, and a is between 0.1 μm and 2 μm, at this time, incident light can be diffusely reflected on the surface of the microstructure 23 to the maximum extent, the more diffusely reflected light is, and the less reflected light is, and the original specular reflection is converted into diffuse reflection by the microstructure 23, so that the reflectivity can be effectively reduced.
The microstructures 23 have a width in the second direction Y intersecting the first direction X of 4 to 30 μm.
With reference to fig. 2, the black matrix 2 at least includes a first light-shielding layer 21 and a second light-shielding layer 22, the first light-shielding layer 21 is located on one side of the substrate 1, the second light-shielding layer 22 is located on one side of the first light-shielding layer 21 away from the substrate 1, the refractive index of the first light-shielding layer 21 is smaller than the refractive index of the second light-shielding layer 22 and larger than the refractive index of the substrate, one side of the second light-shielding layer 22 close to the first light-shielding layer 21 includes a microstructure 23, the width of the microstructure 23 in the second direction is b, and the width of b is between 4 μm and 30 μm, at this time, incident light can be diffusely reflected on the surface of the microstructure 23 to the greatest extent, the more the diffusely reflected light, the less the originally specular reflection is converted into diffuse reflection by the microstructure 23, and the reflectivity can be effectively reduced.
In some optional embodiments, the substrate 100 is a color film substrate, and further includes a color film layer formed on the substrate 1.
Referring to fig. 4, fig. 4 is a schematic view of another planar structure of the substrate provided by the present invention. In fig. 4, the substrate 100 is a color film substrate, and includes a substrate 1, a black matrix 2 formed on the substrate 1, and a color film layer 3 formed on the substrate 1, it is understood that the color film layer 3 may include R, G, B, which is not limited specifically herein; of course, the black matrix 2 in this embodiment still includes at least a first light shielding layer and a second light shielding layer, the first light shielding layer is located on one side of the substrate, the second light shielding layer is located on one side of the first light shielding layer away from the substrate 1, the refractive index of the first light shielding layer is smaller than the refractive index of the second light shielding layer and larger than the refractive index of the substrate, one side of the second light shielding layer close to the first light shielding layer includes a microstructure, and the microstructure is a protrusion facing the substrate.
The color film substrate originally needs to be provided with the black matrix which plays the roles of shading and preventing color mixing, the black matrix 2 at least comprises a first shading layer and a second shading layer, the first shading layer is positioned on one side of the substrate, the second shading layer is positioned on one side of the first shading layer far away from the substrate 1, the refractive index of the first shading layer is smaller than that of the second shading layer and larger than that of the substrate, one side of the second shading layer close to the first shading layer comprises a microstructure, the microstructure is a protrusion facing the substrate, the reflectivity can be greatly reduced on the premise of not increasing the manufacturing process, and the sufficient shading performance can be ensured.
Referring to fig. 5, fig. 5 is a further sectional view taken along line a-a' of fig. 1. Fig. 5 also includes a planarization layer 4, and the planarization layer 4 is located on the side of the second light-shielding layer 22 away from the substrate 1.
In fig. 5, the black matrix 2 at least includes a first light shielding layer 21 and a second light shielding layer 22, the first light shielding layer 21 is located on one side of the substrate 1, the second light shielding layer 22 is located on one side of the first light shielding layer 21 away from the substrate 1, the refractive index of the first light shielding layer 21 is smaller than the refractive index of the second light shielding layer 22 and larger than the refractive index of the substrate, the side of the second light shielding layer 22 close to the first light shielding layer 21 includes a microstructure 23, and the microstructure 23 is a protrusion facing the substrate 1. Fig. 5 shows a case where the microstructure 23 has a curved surface curved toward the substrate base plate 1, but may be a microstructure of another form. Fig. 5 only shows that the microstructures 23 are not closely arranged in the second light-shielding layer 22, but may also be closely arranged, and is not limited in particular. Of course, the raw materials of the black matrix include at least carbon black, bisphenol fluorene epoxy acrylate, propylene glycol methyl ether acetate, ethyl lactate, bis (2-methoxyethyl) ether, diethylene glycol methyl ethyl ether, and additives including at least an organic silicon compound, a fluorine-substituted organic compound, an acrylic resin, and a polyethylene resin. The content of the raw materials in the black matrix can be mixed according to the weight parts of any one of the above embodiments, and the description is omitted here.
Because the microstructure 23 is included on the side of the second light shielding layer 22 close to the first light shielding layer 21, and the microstructure 23 is a protrusion facing the substrate 1, an uneven condition can occur on the side of the second light shielding layer 22 far away from the first light shielding layer 21, the surface of the side of the second light shielding layer 22 far away from the first light shielding layer 21 can be flattened through the arrangement of the flattening layer 4, the optional flattening layer 4 is made of polyimide, the polyimide has good chemical stability, and the polyimide has good mechanical property, high insulating property, high temperature resistance, high dielectric constant, radiation resistance and incombustibility.
Based on the same inventive concept, the present invention further provides a method for manufacturing a substrate, and referring to fig. 6, fig. 6 is a flowchart of a method for manufacturing a substrate according to the present invention, which includes the steps of:
s101: providing a substrate base plate;
s102: mixing raw materials required by a black matrix to form a black matrix material, wherein the raw materials required by the black matrix at least comprise carbon black, bisphenol fluorene epoxy acrylate, propylene glycol methyl ether acetate, ethyl lactate, bis (2-methoxyethyl) ether, diethylene glycol methyl ethyl ether and additives, and the additives at least comprise an organic silicon compound, a fluorine substituted organic matter, acrylic resin and polyethylene resin;
s103: coating a black matrix material on a substrate to form a black matrix layer;
s104: baking the black matrix layer to obtain a black matrix, layering the baked black matrix, and dividing the black matrix into a first shading layer and a second shading layer, wherein the first shading layer is positioned on one side of the substrate, the second shading layer is positioned on one side of the first shading layer far away from the substrate, and the refractive index of the first shading layer is smaller than that of the second shading layer and larger than that of the substrate.
The raw materials of the black matrix at least comprise carbon black, bisphenol fluorene epoxy acrylate, propylene glycol methyl ether acetate, ethyl lactate, bis (2-methoxyethyl) ether, diethylene glycol methyl ethyl ether and additives, wherein the additives at least comprise an organic silicon compound, a fluorine substituted organic matter, an acrylic resin and a polyethylene resin, the components are mixed to be coated on a substrate and can be automatically divided into a first shading layer and a second shading layer when being baked, and after the black matrix is divided into the first shading layer and the second shading layer, because the refractive index of the first shading layer is smaller than that of the second shading layer and larger than that of the substrate, the black matrix is based on r ═ (n1-n2)2/(n1+n2)2It is found that the reflectance at the contact interface surface between the substrate and the first light-shielding layer is low.
In some optional embodiments, before baking the black matrix layer to obtain the black matrix, the method further includes: and exposing and developing the black matrix layer by adopting a gray-scale mask plate, and forming a microstructure on one side of the black matrix layer far away from the substrate base plate, wherein the microstructure is a bulge facing the substrate base plate. Referring to fig. 7, fig. 7 is a flowchart of a method for manufacturing a substrate according to another embodiment of the present invention, including the steps of:
s201: providing a substrate base plate;
s202: mixing raw materials required by a black matrix to form a black matrix material, wherein the raw materials required by the black matrix at least comprise carbon black, bisphenol fluorene epoxy acrylate, propylene glycol methyl ether acetate, ethyl lactate, bis (2-methoxyethyl) ether, diethylene glycol methyl ethyl ether and additives, and the additives at least comprise an organic silicon compound, a fluorine substituted organic matter, acrylic resin and polyethylene resin;
s203: coating a black matrix material on a substrate to form a black matrix layer;
s204: exposing and developing the black matrix layer by using a gray-scale mask plate, and forming a microstructure on one side of the black matrix layer, which is far away from the substrate base plate, wherein the microstructure is a bulge facing the substrate base plate;
s205: baking the black matrix layer to obtain a black matrix, layering the baked black matrix, and dividing the black matrix into a first shading layer and a second shading layer, wherein the first shading layer is positioned on one side of the substrate, the second shading layer is positioned on one side of the first shading layer far away from the substrate, and the refractive index of the first shading layer is smaller than that of the second shading layer and larger than that of the substrate.
According to the invention, the required profile-shaped microstructure can be formed on the side, away from the substrate, of the black matrix layer through the gray-scale mask, and the formed microstructure can convert the specular reflection of light into diffuse reflection, so that the reflectivity is reduced.
With reference to FIG. 6, the baking temperature is 220-240 deg.C, and the baking time is 20-40 min.
The baking aims to dry the black matrix layer on one hand, and automatically stratify the black matrix after baking on the other hand, namely to divide the black matrix into a first shading layer and a second shading layer, when the baking temperature is 220-.
In some optional embodiments, after the black matrix layer is dried to obtain the black matrix, the method further includes coating a color resistance material on the substrate to form a color film layer.
In the manufacturing process, R, G, B or other color resistance materials are sequentially coated on the substrate base plate through the mask plate to form a color film layer. The black matrix is required to be arranged on the color film substrate originally, the black matrix plays a role in shading light and preventing color mixing, the black matrix and the color film layer are sequentially manufactured on the substrate, manufacturing procedures are not added, sufficient shading performance can be guaranteed, and reflectivity can be greatly reduced.
In some optional embodiments, forming a planarization layer is further included after forming the color film layer, and the planarization layer covers the black matrix and the color film layer.
Because the side that is close to first light shield layer on the second light shield layer includes the microstructure, the microstructure is the arch towards the substrate base plate to and the various rete is different with black matrix height in the plane direction of perpendicular to substrate base plate place, so can appear the circumstances of unevenness, can become the surface of black matrix and various rete level through the setting of planarization layer.
Based on the same invention principle, the invention also provides a display panel which comprises the substrate, a second substrate arranged opposite to the substrate and a liquid crystal layer clamped between the substrate and the second substrate. Referring to fig. 8, fig. 8 is a schematic plan view of a display panel according to the present invention. The display panel 200 of the present embodiment includes a substrate 100, an array substrate (not shown) disposed opposite to the substrate 100, and a liquid crystal layer (not shown) interposed between the substrate and a second substrate, wherein the substrate 100 includes the black matrix 2 according to any of the above embodiments of the present invention. The display panel provided in the embodiment of the present invention has the beneficial effects of the substrate provided in the embodiment of the present invention, and specific descriptions of the display panel in the above embodiments may be specifically referred to, and this embodiment is not described herein again.
As can be seen from the above embodiments, the substrate, the manufacturing method and the display panel provided by the invention at least achieve the following beneficial effects:
the black matrix in the substrate at least comprises a first shading layer and a second shading layer, wherein the first shading layer is positioned on one side of the substrate, the second shading layer is positioned on one side of the first shading layer far away from the substrate, the refractive index of the first shading layer is smaller than that of the second shading layer and larger than that of the substrate, one side of the second shading layer close to the first shading layer comprises a microstructure, and the microstructure is formed by that when a part of light rays in a bulge facing the substrate pass through the first shading layer, the refractive index of the first shading layer is smaller than that of the second shading layer and larger than that of the substrate according to the condition that r is (n1-n2)2/(n1+n2)2The inverse of the surface of the contact interface between the substrate and the first light-shielding layerThe refractive index is low;
according to the invention, one side of the second light shielding layer, which is close to the first light shielding layer, comprises the microstructure, the microstructure is a protrusion facing the substrate, when light passing through the first light shielding layer reaches the second light shielding layer again, because the microstructure is arranged on the second light shielding layer, light rays are subjected to diffuse reflection on the surface of the microstructure, and the original mirror reflection is converted into diffuse reflection through the microstructure, so that the reflectivity can be further reduced;
the raw materials of the black matrix at least comprise carbon black, bisphenol fluorene epoxy acrylate, propylene glycol methyl ether acetate, ethyl lactate, bis (2-methoxyethyl) ether, diethylene glycol methyl ethyl ether and additives, wherein the additives at least comprise an organic silicon compound, a fluorine substituted organic matter, acrylic resin and polyethylene resin, and the components are coated on the substrate after being mixed and can be automatically divided into a first shading layer and a second shading layer when being baked;
the black matrix in the invention is the black matrix which should be manufactured on the substrate originally, so that the reflectivity can be reduced on the premise of not increasing the manufacturing process, and the sufficient light shading property can be ensured.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (13)
1. The substrate is characterized in that the substrate is a color film substrate and comprises a substrate and a black matrix formed on the substrate;
the black matrix at least comprises a first shading layer and a second shading layer, the first shading layer is positioned on one side of the substrate, the second shading layer is positioned on one side of the first shading layer far away from the substrate, wherein,
the refractive index of the first light shielding layer is smaller than that of the second light shielding layer and larger than that of the substrate, one side, far away from the first light shielding layer, of the second light shielding layer comprises a microstructure, and the microstructure is a protrusion facing the substrate;
raw materials for manufacturing the black matrix at least comprise carbon black, bisphenol fluorene epoxy acrylate, propylene glycol methyl ether acetate, ethyl lactate, bis (2-methoxyethyl) ether, diethylene glycol methyl ethyl ether and additives, wherein the additives at least comprise an organic silicon compound, a fluorine substituted organic matter, acrylic resin and polyethylene resin, and the first shading layer and the second shading layer are formed by baking and layering the raw materials.
2. The substrate of claim 1, wherein the black matrix is prepared by mixing the following raw materials in parts by weight:
1-10 parts of carbon black,
2-12 parts of bisphenol fluorene epoxy acrylate,
30-40 parts of propylene glycol methyl ether acetate,
10-20 parts of ethyl lactate, namely,
10-20 parts of bis (2-methoxyethyl) ether,
10-20 parts of diethylene glycol methyl ethyl ether,
2-12 parts of an additive.
3. The base plate of claim 1, wherein the microstructure has a curved surface curved toward the substrate base plate, or the microstructure is pyramid-shaped.
4. The base plate of claim 3, wherein the microstructures have a maximum height of 0.1-2 μm in a first direction, the first direction being perpendicular to the plane of the substrate base plate.
5. The substrate of claim 4, wherein the microstructures have a width in a second direction of 4-30 μm, the second direction intersecting the first direction.
6. The base plate of claim 1, further comprising a color film layer formed on the base substrate.
7. The substrate according to claim 1, further comprising a planarization layer on a side of the second light shielding layer away from the substrate.
8. A method for manufacturing a substrate, characterized in that, for manufacturing the substrate of any one of the above claims 1 to 7, comprising the steps of:
providing a substrate base plate;
mixing raw materials required by a black matrix to form a black matrix material, wherein the raw materials required for manufacturing the black matrix at least comprise carbon black, bisphenol fluorene epoxy acrylate, propylene glycol methyl ether acetate, ethyl lactate, bis (2-methoxyethyl) ether, diethylene glycol methyl ethyl ether and an additive, and the additive at least comprises an organic silicon compound, a fluorine substituted organic matter, acrylic resin and polyethylene resin;
coating the black matrix material on the substrate to form a black matrix layer;
baking the black matrix layer to obtain a black matrix, and after baking, dividing the black matrix into a first shading layer and a second shading layer in a layering mode, wherein the first shading layer is located on one side of the substrate, the second shading layer is located on one side, far away from the substrate, of the first shading layer, and the refractive index of the first shading layer is smaller than that of the second shading layer and larger than that of the substrate.
9. The method for manufacturing a substrate according to claim 8, further comprising, before baking the black matrix layer to obtain a black matrix: and exposing and developing the black matrix layer by adopting a gray-scale mask plate, and forming a microstructure on one side of the black matrix layer far away from the substrate base plate, wherein the microstructure is a bulge facing the substrate base plate.
10. The method as claimed in claim 8, wherein the baking temperature is 220-240 ℃, and the baking time is 20-40 min.
11. The method of claim 8, further comprising coating a color resist material on the substrate to form a color film layer after the black matrix layer is dried to obtain the black matrix.
12. The method of claim 11, further comprising forming a planarization layer after forming the color film layer, wherein the planarization layer covers the black matrix and the color film layer.
13. A display panel comprising the substrate according to any one of claims 1 to 7, a second substrate provided to face the substrate, and a liquid crystal layer interposed between the substrate and the second substrate.
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| CN110928037B (en) * | 2019-12-27 | 2022-05-17 | 上海天马微电子有限公司 | Display substrate, manufacturing method thereof and display device |
| CN111261681A (en) | 2020-01-20 | 2020-06-09 | 京东方科技集团股份有限公司 | Color film structure, display panel, preparation method of display panel and display device |
| CN113219715B (en) * | 2021-05-14 | 2022-07-01 | 厦门天马微电子有限公司 | Color film substrate, display panel and display device |
| CN117055259A (en) * | 2023-07-28 | 2023-11-14 | 惠科股份有限公司 | Optical film group, display panel and display device |
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