CN109254445B - Black matrix dispersion liquid, preparation method thereof and display panel - Google Patents
Black matrix dispersion liquid, preparation method thereof and display panel Download PDFInfo
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- CN109254445B CN109254445B CN201811194402.4A CN201811194402A CN109254445B CN 109254445 B CN109254445 B CN 109254445B CN 201811194402 A CN201811194402 A CN 201811194402A CN 109254445 B CN109254445 B CN 109254445B
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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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- 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
- G02F1/1303—Apparatus specially adapted to the manufacture of LCDs
Abstract
The application provides a black matrix dispersion liquid, a preparation method thereof and a display panel, wherein the display panel comprises: the liquid crystal display panel comprises an array substrate, an opposite substrate and a liquid crystal layer, wherein the array substrate and the opposite substrate are oppositely arranged, and the liquid crystal layer is positioned between the array substrate and the opposite substrate; the array substrate or the opposite substrate comprises a black matrix corresponding to a gap part between two adjacent pixel units; the material of the black matrix comprises metal nanoparticles uniformly distributed in dispersion resin and coated with a silicon dioxide coating layer, and blue dye molecules and red dye molecules uniformly fixed in the dispersion resin through chemical bonds.
Description
Technical Field
The application relates to the technical field of display manufacturing, in particular to a black matrix dispersion liquid, a preparation method thereof and a display panel.
Background
The TFT-LCD module comprises a backlight system, a Color Filter (CF), a Thin Film Transistor (TFT), and liquid crystal between the TFT and the CF substrate. In a conventional lcd panel, the color film CF mainly separates light in the backlight into red (R), green (G) and blue (B) light, and a Black Matrix (BM) between the RGB pixels is used to separate each color sub-pixel and block the gap between each color sub-pixel to prevent color mixing and light leakage. At present, the conventional technology is to separate RGB pixels of a color film CF by using BM.
The BM may be classified into metal oxide, carbon black, titanium black, pigment, and the like according to its material composition. At present, carbon black BM is applied to industrial production by means of coating, and the adoption of the carbon black BM mainly lies in high light absorption rate, high thermal stability and low cost. But has a problem in that carbon black BM has a high dielectric constant, easily causing TFT failure in LCD; in addition, since the Carbon black BM mainly absorbs light by using Carbon black particles (Carbon black), the particle property of the Carbon black BM has a certain reflection to light, and particularly has a higher reflection to light with a longer wavelength.
Therefore, the prior art has defects and needs to be improved urgently.
Disclosure of Invention
The application provides a black matrix dispersion liquid, a preparation method thereof and a display panel, which can obtain a black matrix material with low conductivity, low reflectivity and high absorbance, thereby improving the display performance of the display panel.
In order to solve the above problems, the technical solution provided by the present application is as follows:
the application provides a preparation method of a black matrix dispersion liquid, which comprises the following steps:
step S10, adding metal nano particles into an alkaline solution containing ammonia water, and then adding tetraethyl orthosilicate to form a silicon dioxide coating layer coated on the surfaces of the metal nano particles;
step S20, preparing a dye mixed solution containing a red dye and a blue dye, wherein the red dye and the blue dye are uniformly distributed in the dye mixed solution;
step S30, adding the metal nanoparticles coated with the silica coating layer and the dye mixed solution into a dispersion resin, mixing them, so that the metal nanoparticles coated with the silica coating layer are uniformly distributed in the dispersion resin, and the red dye and the blue dye are both subjected to a cross-linking reaction with the dispersion resin and fixed in the dispersion resin, thereby forming the black matrix dispersion liquid.
In the method for preparing a black matrix dispersion according to the present application, the method further includes, before the step S10, the steps of: adding one or more than one metal of gold, silver, copper, aluminum, iron, titanium and nickel into citrate, and adding seed crystals to form the metal nanoparticles.
In the preparation method of the black matrix dispersion liquid of the present application, the step S10 includes the steps of:
step S101, adding metal nanoparticles into the alkaline solution with the volume ratio of water to ethanol to ammonia water being 10:75: 3;
step S102, adding the tetraethyl orthosilicate, and hydrolyzing the tetraethyl orthosilicate into silicic acid under the catalytic action of the ammonia water;
step S103, the silicic acid is subjected to condensation reaction to form the silicon dioxide coating layer coating the metal nanoparticles.
In the preparation method of the black matrix dispersion liquid, the thickness of the silica coating layer is between 20nm and 50 nm.
In the method for producing a black matrix dispersion liquid according to the present application, the raw material containing the blue dye includes one or more of triarylmethane derivatives, dimer triarylmethane derivatives, and phthalocyanine derivatives.
In the method for producing a black matrix dispersion liquid of the present application, the raw material containing the red dye includes one or more of perylene derivatives.
In the preparation method of the black matrix dispersion of the present application, the step S30 further includes the steps of:
step S301, adding the metal nanoparticles coated with the silicon dioxide coating layer, the dye mixed solution and the dye fluorescence quencher into dispersion resin for mixing;
step S302, adding a cross-linking agent, a homopolymer and an active agent, and uniformly mixing;
step S303, the metal nanoparticles coated with the silica coating layer are uniformly dispersed in the dispersion resin, and the red dye and the blue dye are polymerized by the monomer and are cross-linked with the dispersion resin by the cross-linking agent to be fixed in the dispersion resin.
The application also provides a black matrix dispersion liquid prepared by the preparation method.
The present application also provides a display panel prepared by using the above black matrix dispersion, including: the liquid crystal display panel comprises an array substrate, an opposite substrate and a liquid crystal layer, wherein the array substrate and the opposite substrate are oppositely arranged, and the liquid crystal layer is positioned between the array substrate and the opposite substrate;
the array substrate or the opposite substrate comprises a black matrix corresponding to a gap part between two adjacent pixel units;
the material of the black matrix comprises metal nanoparticles uniformly distributed in dispersion resin and coated with a silicon dioxide coating layer, and blue dye molecules and red dye molecules uniformly fixed in the dispersion resin through chemical bonds.
In the display panel of the present application, the display panel further includes a color film corresponding to the pixel units, where the color film is formed on the array substrate corresponding to the pixel units, and the black matrix is formed on the opposite substrate corresponding to a gap portion between two adjacent pixel units;
or the color film is prepared on the opposite substrate corresponding to the pixel units, and the black matrix is prepared on the array substrate corresponding to a gap part between two adjacent pixel units.
The beneficial effect of this application does: compared with a black matrix in the existing display panel, the black matrix dispersion liquid, the preparation method thereof and the display panel provided by the application can reduce the conductivity of metal nanoparticles by adding a transparent silicon dioxide (SiO2) protective layer on the outer layer of the metal nanoparticles, can improve the absorption of the dye to light by using a Local Surface Plasmon Resonance (LSPR) mode of the metal nanoparticles and can realize full absorption in a visible light (380-780 nm) range by using the black matrix which is made of the metal nanoparticles containing the blue dye, the red dye and the silicon dioxide coated on the surface, so that the black matrix material realizes the characteristics of high absorbance (OD) and low reflectivity, and further improves the performance of the display panel.
Drawings
In order to illustrate the embodiments or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the application, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart of a method for preparing a black matrix dispersion according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a metal nanoparticle coated with a silica coating layer according to an embodiment of the present disclosure;
fig. 3 is a flowchart of the method of step S30 in fig. 1.
Detailed Description
The following description of the various embodiments refers to the accompanying drawings, which are included to illustrate specific embodiments that can be implemented by the application. Directional phrases used in this application, such as [ upper ], [ lower ], [ front ], [ rear ], [ left ], [ right ], [ inner ], [ outer ], [ side ], etc., refer only to the directions of the attached drawings. Accordingly, the directional terminology is used for purposes of illustration and understanding, and is in no way limiting. In the drawings, elements having similar structures are denoted by the same reference numerals.
This application is to prior art's display panel's black matrix material, owing to have higher dielectric constant, leads to the TFT device to become invalid easily to and there is the reflectivity of light higher, and influence the technical problem of display panel performance, this defect can be solved to this embodiment.
Fig. 1 is a flow chart of a method for preparing a black matrix dispersion according to an embodiment of the present disclosure. The method comprises the following steps:
step S10, adding metal nano particles into an alkaline solution containing ammonia water, and then adding tetraethyl orthosilicate to form a silicon dioxide coating layer coated on the surfaces of the metal nano particles;
wherein, firstly, the preparation of the Metal-Nanoparticle (Metal-Nanoparticle MNP) is carried out, the Metal-Nanoparticle can be prepared by a citrate-seed crystal growth method, and the method specifically comprises the following steps: adding one or more than one metal particles of gold, silver, copper, aluminum, iron, titanium and nickel into citrate, adding seed crystals, and regulating and controlling the size of the metal nanoparticles by using the amount of the seed crystals so as to form the metal nanoparticles. Wherein, the metal nano-particles are not limited to the above materials, and can be other metal materials; preferably, the particle size of the metal nanoparticles is between 10nm and 100 nm.
Specifically, the step S10 includes the steps of:
step S101, adding metal nanoparticles into the alkaline solution with the volume ratio of water to ethanol to ammonia water being 10:75: 3;
wherein the metal nanoparticles prepared by the above method are added to a first mixed system of water (10mL), ethanol (75mL), and ammonia water (3 mL).
Step S102, adding the tetraethyl orthosilicate, and hydrolyzing the tetraethyl orthosilicate into silicic acid under the catalytic action of the ammonia water;
tetraethyl orthosilicate (TEOS,6mL) is used as a silicon source by adopting a Stober sol-gel method, and can be hydrolyzed into silicic acid under the catalytic condition of ammonia water.
Step S103, the silicic acid is subjected to condensation reaction to form the silicon dioxide coating layer coating the metal nanoparticles.
Specifically, as shown in fig. 2, silicic acid can form a core on the surface of the metal nanoparticle 20 through a condensation reaction to form a silica coating layer 21, wherein the thickness of the silica coating layer 21 is controlled to be 20nm to 50 nm; preferably, the thickness of the silica coating layer 21 is 30 nm; forming a second mixed system.
Step S20, preparing a dye mixed solution containing a red dye and a blue dye, wherein the red dye and the blue dye are uniformly distributed in the dye mixed solution;
wherein, the raw material containing the blue dye comprises one or more than one of triarylmethane derivatives, dimer triarylmethane derivatives and phthalocyanine derivatives; forming a third mixed system.
Specifically, the structural formula of the triarylmethane derivative is shown as follows:
wherein, R1, R2, R3, R4, R5, R6 may be a linear alkane group, a branched alkane group, an ester group-containing chain group, or an F-substituted alkane derivative group; the carbon chain length of R1, R2, R3, R4, R5 and R6 is 1-25.
The structural formula of the triarylmethane derivatives of the dimer is as follows:
wherein, R1, R2, R3, R4, R5 and R6 are straight-chain alkane groups, branched alkane groups, chain object groups containing ester groups or F-substituted alkane derivative groups; the carbon chain length of R1, R2, R3, R4, R5 and R6 is 1-25; x-is F-, Cl-, Br-, CF3SO3-, CF2HSO 3-or CFH2SO 3-and other anions.
The structural formula of the phthalocyanine derivative is as follows:
wherein the phthalocyanine may or may not contain Cu at the center, and R1 to R8 may be a linear alkane group, a branched alkane group, a chain group containing an ester group, or an F-substituted alkane derivative group; the carbon chain length of R1-R8 is 1-25; secondly, R1-R8 may also contain a cyclic structure, specifically as shown in the following structural formula:
wherein, R9-R13 can be straight chain alkane group, branched chain alkane group, chain object group containing ester group, or F substituted alkane derivative group, and the carbon chain length of R9-R14 is 1-25.
In addition, the raw material containing the red dye comprises one or more than one of perylene derivatives.
Specifically, the structural formula of the perylene derivative is as follows:
wherein R1, R2, R3, R4, R5, R6, R7, and R8 may be a linear alkane group, a branched alkane group, a chain group containing an ester group, or a F-substituted alkane derivative group; the carbon chain length of R1-R8 is 1-25; secondly, R1, R2, R3, R4, R5, R6, R7, R8 may also contain a cyclic structure, specifically including the following structural formula:
wherein, R9-R14 can be straight-chain alkane group, branched alkane group, chain object group containing ester group, or F substituted alkane derivative group; the carbon chain length of R9-R14 is 1-25.
The light absorption range of the blue dye is 580-780 nm, and the light absorption range of the red dye is concentrated between 380-600 nm; this allows full absorption in the visible range (380nm to 780 nm).
Step S30, adding the metal nanoparticles coated with the silica coating layer and the dye mixed solution into a dispersion resin, mixing them, so that the metal nanoparticles coated with the silica coating layer are uniformly distributed in the dispersion resin, and the red dye and the blue dye are both subjected to a cross-linking reaction with the dispersion resin and fixed in the dispersion resin, thereby forming the black matrix dispersion liquid.
As shown in fig. 3, the step S30 includes the following steps:
step S301, adding the metal nanoparticles coated with the silicon dioxide coating layer, the dye mixed solution and the dye fluorescence quencher into dispersion resin for mixing;
step S302, adding a cross-linking agent, a homopolymer and an active agent, and uniformly mixing;
of course, the adding sequence of the above materials is not limited, and other auxiliary materials acceptable for the manufacturing process can be added to form a fourth mixed system, which comprises the following components in the following proportion:
wherein the metal nanoparticles coated with the silica coating layer have light-shielding property, and the electrical conductivity of the metal nanoparticles is greatly reduced due to the coating of the silica coating layer, preferably, the proportion of the components is 5.1-8.0%. The dye mixed liquid can be used for absorbing visible light, and the component proportion of the dye mixed liquid is 15-25%. Preferably, the ratio between the metal nanoparticles and the dye mixture may be 3.1% to 5.0%. The dye fluorescence quenching agent can prevent the dye from generating fluorescence, and the component proportion of the dye fluorescence quenching agent is 3-5%. The dispersant can disperse the particles, and the proportion of the components is 3.5-4.1%. The cross-linking agent can increase the molecular weight through cross-linking reaction, and the component proportion is 5.7-7.3%. The monomer is used for increasing molecular weight like the cross-linking agent, and the content ratio of the components is 1.8-2.3%. The photoinitiator is used for activating the photoinitiator through light, and the proportion of the components is 0.8-1.1%. The active agent comprises 2-2.4% of components. The solvent is used for dissolving, calculating, adjusting viscosity and the like, and the component proportion of the solvent is 59.9-63.7%.
Step S303, the metal nanoparticles coated with the silica coating layer are uniformly dispersed in the dispersion resin, and the red dye and the blue dye are polymerized by the monomer and are cross-linked with the dispersion resin by the cross-linking agent to be fixed in the dispersion resin.
The black matrix dispersion liquid with high absorbance and low reflectivity can be formed by the steps and can be used for preparing a black matrix in a display panel.
The application also provides a black matrix dispersion liquid prepared by the preparation method.
The present application also provides a display panel prepared by using the above black matrix dispersion, the display panel includes: the liquid crystal display panel comprises an array substrate, an opposite substrate and a liquid crystal layer, wherein the array substrate and the opposite substrate are oppositely arranged, and the liquid crystal layer is positioned between the array substrate and the opposite substrate; the array substrate or the opposite substrate comprises a black matrix corresponding to a gap part between two adjacent pixel units; the material of the black matrix comprises metal nanoparticles uniformly distributed in dispersion resin and coated with a silicon dioxide coating layer, and blue dye molecules and red dye molecules uniformly fixed in the dispersion resin through chemical bonds.
The display panel further comprises a color film corresponding to the pixel units, the color film is prepared on the array substrate corresponding to the pixel units, and the black matrix is prepared on the opposite substrate corresponding to a gap part between two adjacent pixel units.
Or the color film is prepared on the opposite substrate corresponding to the pixel units, and the black matrix is prepared on the array substrate corresponding to a gap part between two adjacent pixel units.
It is understood that the display panel further includes other conventional film layers, such as a thin film transistor layer, a polarizer, etc., which are not limited herein.
The application provides a black matrix dispersion and a preparation method thereof, and a display panel, through adding a layer of transparent silica protective layer on the outer layer of metal nano-particles, the conductivity of the metal nano-particles is reduced, through containing blue dye, red dye and a black matrix made of the metal nano-particles with silica coated on the surface, the absorption of the dye to light can be improved by using the local surface plasma resonance mode of the metal nano-particles, the full absorption can be realized in the visible light range, so that the black matrix material realizes the characteristics of high absorbance and low reflectivity, and the performance of the display panel is further improved.
In summary, although the present application has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present application, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, so that the scope of the present application shall be determined by the appended claims.
Claims (9)
1. A method for preparing a black matrix dispersion, comprising the steps of:
step S10, adding metal nanoparticles into an alkaline solution containing ammonia water, adding tetraethyl orthosilicate, hydrolyzing the tetraethyl orthosilicate into silicic acid under the catalytic action of the ammonia water, and performing condensation reaction on the silicic acid to form a silicon dioxide coating layer coated on the surfaces of the metal nanoparticles;
step S20, preparing a dye mixed solution containing a red dye and a blue dye, wherein the red dye and the blue dye are uniformly distributed in the dye mixed solution;
step S30, adding the metal nanoparticles coated with the silica coating layer, the dye mixed solution and the dye fluorescence quencher into a dispersion resin, adding a cross-linking agent, a homopolymer and an active agent, and mixing to uniformly distribute the metal nanoparticles coated with the silica coating layer in the dispersion resin, wherein the red dye and the blue dye are polymerized by the homopolymer and cross-linked with the dispersion resin by the cross-linking agent to be fixed in the dispersion resin, thereby forming the black matrix dispersion liquid.
2. The method according to claim 1, further comprising, before the step S10, the steps of: adding one or more than one metal of gold, silver, copper, aluminum, iron, titanium and nickel into citrate, and adding seed crystals to form the metal nanoparticles.
3. The production method according to claim 1, wherein the metal nanoparticles are added to the alkaline solution in a volume ratio of water to ethanol to ammonia water of 10:75: 3.
4. The method of claim 1, wherein the silica coating has a thickness of 20nm to 50 nm.
5. The method according to claim 1, wherein the raw material containing the blue dye includes one or more of triarylmethane derivatives, dimer triarylmethane derivatives, and phthalocyanine derivatives.
6. The method according to claim 1, wherein the raw material containing the red dye includes one or more of perylene derivatives.
7. A black matrix dispersion prepared by the method according to any one of claims 1 to 6.
8. A display panel produced using the black matrix dispersion liquid according to claim 7, comprising: the liquid crystal display panel comprises an array substrate, an opposite substrate and a liquid crystal layer, wherein the array substrate and the opposite substrate are oppositely arranged, and the liquid crystal layer is positioned between the array substrate and the opposite substrate;
the array substrate or the opposite substrate comprises a black matrix corresponding to a gap part between two adjacent pixel units;
the material of the black matrix comprises metal nanoparticles uniformly distributed in dispersion resin and coated with a silicon dioxide coating layer, and blue dye molecules and red dye molecules uniformly fixed in the dispersion resin through chemical bonds.
9. The display panel according to claim 8, further comprising a color film corresponding to the pixel units, wherein the color film is formed on the array substrate corresponding to the pixel units, and the black matrix is formed on the opposite substrate corresponding to a gap between two adjacent pixel units;
or the color film is prepared on the opposite substrate corresponding to the pixel units, and the black matrix is prepared on the array substrate corresponding to a gap part between two adjacent pixel units.
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| PCT/CN2018/116084 WO2020077722A1 (en) | 2018-10-15 | 2018-11-19 | Black matrix dispersion liquid, preparation method therefor, and display panel |
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