CN110794632A - ITO handwriting film for color handwriting board and preparation method thereof - Google Patents
ITO handwriting film for color handwriting board and preparation method thereof Download PDFInfo
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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
- G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/13718—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on a change of the texture state of a cholesteric liquid crystal
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/0015—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterized by the colour of the layer
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/14—Metallic material, boron or silicon
- C23C14/20—Metallic material, boron or silicon on organic substrates
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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
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Abstract
The invention relates to an ITO handwriting film for a color handwriting board and a preparation method thereof, wherein the ITO handwriting film comprises a color semitransparent ITO conductive film, a liquid crystal layer and a white film ITO conductive film which are sequentially arranged; the colored semitransparent ITO conductive film comprises a substrate layer, a metal layer and an ITO conductive layer which are sequentially arranged, the ITO conductive layer is attached to the liquid crystal layer, and the substrate layer is a PET substrate layer. According to the preparation method of the ITO handwriting film, metal layers with different colors are additionally plated by replacing different metal targets; and the color depth is adjusted by adjusting the film thickness of different metal layers to prepare the colored semitransparent conductive films with different colors, and then the colored semitransparent conductive films are utilized to prepare the novel single-color handwriting film, so that the handwriting board presents light colors and has better overall effect.
Description
Technical Field
The invention relates to the technical field of handwriting films, in particular to an ITO handwriting film for a color handwriting board and a preparation method thereof.
Background
The handwriting board is called a liquid crystal electronic handwriting board, and mainly records tracks by a handwriting film. The handwriting film is formed by filling a polymerizable mixed monomer or prepolymer, liquid crystal and a related liquid crystal composition (chiral dopant/optical rotation agent) in the middle of two base materials with conductive layers under an external field (such as light, heat and the like), wherein the liquid crystal composition is mainly used for adjusting the pitch of cholesteric liquid crystal so as to achieve the effect of adjusting the Bragg reflection of the cholesteric liquid crystal, and specifically, the handwriting is displayed by utilizing the difference of the visible light reflectivity of the liquid crystal at different stable states. After the handwriting film is connected to the refreshing circuit for refreshing, the cholesteric liquid crystal is in a stable FC state, and when pressure is applied to the handwriting film, the cholesteric liquid crystal is turned to a stable P state. The liquid crystal in the P state has higher reflectivity to light in a specific wave band, and the central reflection wavelength of the liquid crystal is adjusted by adjusting the screw pitch of the cholesteric liquid crystal.
With the continuous deepening and popularization of handwriting boards, the market has seen the demand of high-end type and monochrome color type handwriting boards. However, most of the color handwriting boards on the market are realized by pasting films, namely, color glass or color films are superposed on the standard handwriting films, so that the handwriting boards have strong colors, and the overall effect and the attractiveness are influenced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a novel ITO handwriting film for a color handwriting board and a preparation method thereof.
The technical scheme adopted by the invention is as follows:
an ITO handwriting film for a color handwriting board comprises a color semitransparent ITO conductive film, a liquid crystal layer and a white film ITO conductive film which are sequentially arranged; the colored semitransparent ITO conductive film comprises a substrate layer, a metal layer and an ITO conductive layer which are sequentially arranged, the ITO conductive layer is attached to the liquid crystal layer, and the substrate layer is a PET substrate layer.
A preparation method of an ITO handwriting film for a color handwriting board comprises the following steps:
A. selecting a base material matched with the ITO conductive layer, wherein the base material can be selected from a PET material;
B. color matching: determining the color type and the number of the metal layers to be plated according to the color of the color plate, and toning each metal layer;
C. adding a metal plating layer: coating one or more metal layers with different colors on the surface of one side of the base material to perform film layer superposition; when plating, the color depth of the metal layer is adjusted by adjusting the thickness of different metal layers;
D. adding a plated conductive layer: plating a conductive layer on the surface of the outermost metal layer to form a colorful semitransparent ITO conductive film;
E. coating: dripping the liquid crystal mixture between the colored semitransparent ITO conductive film and the white film ITO conductive film, and forming a thin layer of 7-30 mu m after uniform extrusion by a rolling shaft;
F. ultraviolet curing: and preparing the color ITO handwriting film by ultraviolet photopolymerization at the temperature of 20-35 ℃.
Preferably, in the toning process of the metal layer in the step B, values of L, a, and B of the sample are measured in advance, and the values of L, a, and B of the sample are continuously corrected so as to be close to or the same as the values of L, a, and B of the color plate. L represents a brightness value, a positive value is white, and a negative value is black; a represents red/green value, positive value is red, negative value is green; b indicates yellow/blue values, positive values are yellow and negative values are blue. The difference values of L, a and b of the sample and the color plate are continuously corrected in the color matching process, so that the purposes of smaller difference value and closer color are achieved.
Preferably, in the step C, in the process of plating the metal layers with different colors, the metal layers with different colors are plated by replacing different metal targets to perform film layer superposition.
Preferably, in the step C, the film thickness of the metal layers is controlled by different speeds, target powers and plating times. The film thickness of the metal layer is completely in a linear relation with the traveling speed and the target power, namely the slower the traveling speed is, the thicker the film thickness is; the higher the target power, the thicker the film thickness. The transmittance of the metal layer and the film thickness are approximately in a linear relation, so that the transmittance of the metal layer, the walking speed and the target power are approximately in a linear relation.
Preferably, the specific adjusting method of the film thickness of the metal layer, the walking speed and the target power comprises the following steps: firstly, a sample is made according to a walking speed and power, the transmittance of the sample is measured, then the transmittance of different walking speeds and different target powers is calculated through conversion according to a proportion, and finally fine adjustment is carried out through test verification.
Preferably, the transmittance can be adjusted between 10% and 75%.
Preferably, in the step B, an indium tin target and a titanium oxide target are selected to perform film layer superposition, and two colors of blue and gold are superposed.
Preferably, the indium tin ratio of the indium tin target is 2: 8.
Preferably, in the step B, stainless steel is selected as a metal target for film coating, so as to prepare a gray semitransparent ITO conductive film.
Preferably, the stainless steel is stainless steel 321 with the purity of 99.9%.
Compared with the prior art, the invention has the following advantages: the monochrome handwriting board is a novel high-end handwriting board product developed by changing the color of an ITO conductive film in a film coating mode on the basis of a standard handwriting board and replacing the original black film with a colorful semitransparent ITO conductive film. The single-color handwriting film integrally presents light color, which represents honor, fashion, stability and intelligence.
The invention relates to a preparation method of an ITO handwriting film for a color handwriting board, which comprises the steps of plating one or more metal layers on the bottom layer before plating a conductive layer, and plating the metal layers with different colors by replacing different metal targets; then the depth of color can be adjusted by adjusting the thickness of the film layers of different metal layers. The multiple metal layers are overlapped together, different color shades are changed in an assisted mode, then the color which changes in a great range can be combined, the colorful semi-transparent conductive films with different colors are manufactured, the colorful semi-transparent conductive films are recycled to manufacture the novel single-color handwriting film, the handwriting board is enabled to be light in color, the whole effect is good, and the user experience degree is greatly increased.
Drawings
FIG. 1 is a schematic structural diagram of an ITO handwriting film for a color handwriting pad of the invention.
The numbers in the figures indicate:
1-color semitransparent ITO conductive film, 11-substrate, 12-metal layer, 13-conductive layer, 2-liquid crystal layer and 3-white film ITO conductive film.
The specific implementation mode is as follows:
for the purpose of enhancing the understanding of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and embodiment examples. The invention can be implemented by:
example 1
Referring to fig. 1, a gray ITO handwriting film for a handwriting pad includes a color semi-transparent ITO conductive film 1, a liquid crystal layer 2, and a white ITO conductive film 3, which are sequentially disposed; the colored semitransparent ITO conductive film 1 comprises a substrate layer 11, a metal layer 12 and an ITO conductive layer 13 which are sequentially arranged, and the ITO conductive layer 13 is attached to the liquid crystal layer 2. The color semitransparent ITO conductive film is a gray semitransparent ITO conductive film.
A preparation method of a gray ITO handwriting film comprises the following steps:
A. selecting a PET substrate adaptive to the ITO conductive layer;
B. color matching: selecting stainless steel 321 with the purity of 99.9 percent as a metal target material; in the color mixing process, the values of L, a and b of the sample are measured in advance, and the values of L, a and b of the sample are continuously corrected to be close to or the same as the values of L, a and b of the color plate;
C. adding a metal plating layer: plating a gray metal layer on the surface of one side of the substrate to be plated with the conductive layer; when in plating, the gray scale, namely the transmittance, of the whole light modulation film is adjusted by adjusting the thickness of the metal layer film layer, and can be adjusted between 10% and 75%. The thickness of the metal layer is controlled by different speeds, target powers and coating times. The specific adjusting method comprises the following steps: firstly, a sample is made according to a walking speed and power, the transmittance of the sample is measured, then the transmittance of different walking speeds and different target powers is calculated through conversion according to a proportion, and finally, fine adjustment is carried out through test verification.
Through the test, the relation between different walking speeds, different target powers and the transmittance of the metal layer is as follows:
1) the target power was fixed at 5KW (single target), and the relationship between different walking speeds and transmittance was as follows:
2) the walking speed is fixed at 3m/min, and the relationship between different target powers and the transmittance is as follows:
D. adding a plated conductive layer: plating an ITO conductive layer on the surface of the metal layer to obtain the needed gray semitransparent ITO conductive film;
E. coating: dripping the liquid crystal mixture between the gray semitransparent ITO conductive film and the white ITO conductive film, and extruding uniformly by a roller to form a thin layer of 15 mu m;
F. ultraviolet curing: and preparing a gray ITO handwriting film by ultraviolet photopolymerization at the temperature of 25 ℃.
The specific process parameters of the three gray semitransparent ITO conductive films obtained in the steps B-D are as follows:
the gray ITO handwriting film has the advantages that the background of the ground color is gray and transparent, the gray level, namely the transmittance, of the film is adjusted by adjusting the thickness of the film layer of the metal layer, and the transmittance is adjustable between 10% and 75%. The gray ITO handwriting film is a novel high-end monochrome handwriting board, the handwriting board integrally presents light and elegant gray, the gray is interspersed between black and white, is the highest and most noble color in all colors, and symbolizes honor, fashion, robustness and wisdom. The neutrality and the ductility of the gray color enable the color to be matched with any color at will, and the color is more suitable for authoritative and noble application places.
Example 2
A preparation method of a blue or golden ITO handwriting film comprises the following steps:
A. selecting a PET substrate which is adaptive to the ITO conductive layer of the handwriting film;
B. adjusting the color of the metal layer: selecting an indium tin target (the ratio of indium to tin is 2:8) and a titanium oxide target to carry out film layer superposition; each metal target corresponds to a target material with one color, and metal layers with different colors are plated by replacing different metal targets; in the color mixing process, the values of L, a and b of the sample are measured in advance, and the values of L, a and b of the sample are continuously corrected to be close to or the same as the values of L, a and b of the color plate; superposing a blue color or a golden color by using an indium tin target and a titanium oxide target;
C. adding a metal plating layer: c, plating the metal layer determined in the step B on the surface of one side of the substrate to be plated with the conductive layer; when plating, the color depth of the metal layer is adjusted by adjusting the thickness of different metal layers; the film thickness of different metal layers is controlled by different walking speeds, target power and film plating times.
D. Adding a plated conductive layer: the ITO conductive layer is plated on the surface of the outermost metal layer to obtain the required blue or golden semitransparent ITO conductive film;
E. coating: dripping the liquid crystal mixture between the semitransparent ITO conductive film and the white ITO conductive film, and uniformly extruding by a roller to form a thin layer of 10 mu m;
F. ultraviolet curing: preparing a blue or golden ITO handwriting film by ultraviolet photopolymerization at the temperature of 25 ℃.
The monochrome handwriting film changes the color of the ITO film in a film coating mode, and replaces the original black film with the colored semitransparent film, so that the monochrome handwriting board integrally presents light color, has excellent integral effect, and is suitable for wide application and popularization.
Finally, it should be noted that: 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, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (10)
1. An ITO handwriting film for a color handwriting board is characterized by comprising a color semitransparent ITO conductive film, a liquid crystal layer and a white film ITO conductive film which are sequentially arranged; the colored semitransparent ITO conductive film comprises a base material layer, a metal layer and an ITO conductive layer which are sequentially arranged, and the ITO conductive layer is attached to the liquid crystal layer.
2. A preparation method of an ITO handwriting film for a color handwriting board is characterized by comprising the following steps:
A. selecting a base material adaptive to the ITO conductive layer;
B. color matching: determining the color type and the number of the metal layers to be plated according to the color of the color plate, and toning each metal layer;
C. adding a metal plating layer: coating one or more metal layers with different colors on the surface of one side of the base material to perform film layer superposition; when plating, the color depth of the metal layer is adjusted by adjusting the thickness of different metal layers;
D. adding a plated conductive layer: plating a conductive layer on the surface of the outermost metal layer to form a colorful semitransparent ITO conductive film;
E. coating: dripping the liquid crystal mixture between the colored semitransparent ITO conductive film and the white ITO conductive film, and forming a thin layer after uniform extrusion by a rolling shaft;
F. ultraviolet curing: and preparing the color ITO handwriting film by ultraviolet polymerization.
3. The method of claim 2, wherein the color matching process of the metal layer in step B is performed by measuring the values of L, a, and B of the sample in advance, and continuously correcting the values of L, a, and B of the sample to be close to or the same as the values of L, a, and B of the color plate.
4. The method for preparing an ITO handwriting film for a color handwriting pad according to claim 2, wherein in step C, different metal layers of different colors are plated by replacing different metal targets for film layer superposition during the process of plating different metal layers of different colors.
5. The method for preparing an ITO handwriting film for a color handwriting pad according to claim 2, 3 or 4, wherein the film thickness of different metal layers in step C is controlled by different running speeds, target powers and plating times.
6. The method for preparing an ITO handwriting film for a color handwriting board according to claim 5, wherein the specific adjustment method of the film thickness, the walking speed and the target power of the metal layer comprises the following steps: firstly, a sample is made according to a walking speed and power, the transmittance of the sample is measured, then the transmittance of different walking speeds and different target powers is calculated through conversion according to a proportion, and finally fine adjustment is carried out through test verification.
7. The method for preparing an ITO handwriting film for a color handwriting pad according to claim 6, wherein the transmittance can be adjusted between 10% and 75%.
8. The method for preparing an ITO handwriting film for a color handwriting pad according to claim 2, 3, 4, 6 or 7, characterized in that in step B, an indium tin target and a titanium oxide target are selected for film layer superposition to obtain blue and gold colors; the indium tin ratio of the indium tin target is 2: 8.
9. The method for preparing an ITO handwriting film for a color handwriting pad according to claim 2, 3, 4, 6 or 7, characterized in that in step B, stainless steel is selected as a metal target for film coating to prepare a gray semi-transparent ITO conductive film.
10. The method of claim 9, wherein the stainless steel is 321 with a purity of 99.9%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112361941A (en) * | 2020-11-09 | 2021-02-12 | 天津正丽科技有限公司 | Device and method for rapidly and qualitatively detecting deformation of invisible tooth appliance |
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| CN203812212U (en) * | 2014-05-06 | 2014-09-03 | 介面光电股份有限公司 | Electrode structure and touch panel device thereof |
| CN104951112A (en) * | 2014-03-25 | 2015-09-30 | 富元精密镀膜股份有限公司 | Touch panel and manufacturing method thereof |
| CN106997116A (en) * | 2017-04-28 | 2017-08-01 | 深圳市唯酷光电有限公司 | The hand-written film of liquid crystal, the preparation method of the hand-written film of liquid crystal and preparation facilities |
| CN206725911U (en) * | 2017-04-05 | 2017-12-08 | 深圳市唯酷光电有限公司 | Color liquid crystal writing device |
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2019
- 2019-12-06 CN CN201911243993.4A patent/CN110794632A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101429640A (en) * | 2008-10-21 | 2009-05-13 | 北京东方新材科技有限公司 | Transparent conductive film production method |
| CN104951112A (en) * | 2014-03-25 | 2015-09-30 | 富元精密镀膜股份有限公司 | Touch panel and manufacturing method thereof |
| CN203812212U (en) * | 2014-05-06 | 2014-09-03 | 介面光电股份有限公司 | Electrode structure and touch panel device thereof |
| CN206725911U (en) * | 2017-04-05 | 2017-12-08 | 深圳市唯酷光电有限公司 | Color liquid crystal writing device |
| CN106997116A (en) * | 2017-04-28 | 2017-08-01 | 深圳市唯酷光电有限公司 | The hand-written film of liquid crystal, the preparation method of the hand-written film of liquid crystal and preparation facilities |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112361941A (en) * | 2020-11-09 | 2021-02-12 | 天津正丽科技有限公司 | Device and method for rapidly and qualitatively detecting deformation of invisible tooth appliance |
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