CN101329416B - Preparation method of optical diffusion thin film - Google Patents
Preparation method of optical diffusion thin film Download PDFInfo
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- CN101329416B CN101329416B CN2008100631272A CN200810063127A CN101329416B CN 101329416 B CN101329416 B CN 101329416B CN 2008100631272 A CN2008100631272 A CN 2008100631272A CN 200810063127 A CN200810063127 A CN 200810063127A CN 101329416 B CN101329416 B CN 101329416B
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Abstract
The invention discloses an optical diffusion film which comprises a transparent substrate and an upper diffusion coating with upper diffusion particles; the optical diffusion film is characterized in that the transparent substrate is made of an optical transparent material with the refractive index of 1.4 to 1.75, the upper diffusion particles are mutually and tightly contacted and distributed onthe surface of the transparent substrate, the upper diffusion layer is formed by coating on the surface of the transparent substrate after preparing a dilution coating material by using a diffusion material and a thinner, wherein, the weight of the thinner is 30 percent to 70 percent of the total weight of the dilution coating material, the thickness of the upper diffusion coating before the filmformation is 1 to 3 times of the maximum geometrical size of the upper diffusion particles which are vertical to the transparent substrate, the thickness of the upper diffusion coating after the filmformation is 1/2 to 7/8 of the maximum geometrical size of the upper diffusion particles which are vertical to the transparent substrate, the optical diffusion film has the advantages that the optical diffusion film can effectively improve the collection capacity of the diffusion film, and a liquid crystal display device which applies the optical diffusion film has fewer components, higher optical uniformity and brightness.
Description
Technical field
The present invention relates to a kind of optical thin film, especially relate to a kind of preparation method of optical diffusion membrane.
Background technology
Optical diffusion membrane is widely used in liquid crystal indicator, and advertising lamp box, lighting, mobile communication equipment button etc. need on the device of light source so that even illumination to be provided.Existing application mostly is in the optical diffusion membrane of liquid crystal indicator and adopts figuratum organic film of single belt that the calendering technology produces and the multilayer film that adopt application pattern to produce, and wherein adopts the scattering particle that contains different size in the overlay of the multilayer film that application pattern produces.Fig. 1 is the structural representation of the optical diffusion membrane produced of traditional employing application pattern, and this optical diffusion membrane mainly comprises transparency carrier 10, last overlay 20 and go up scattering particle 40 and following overlay 30 reach under scattering particle 50.The optical diffusion membrane that traditional employing application pattern is produced mainly relies on the scattering particle of random scatter in the overlay and different size that the incident ray that enters in the coating is carried out abundant scattering, so that the direction stochastic distribution of emergent ray, thereby make the inhomogeneous light field homogenising of incident, and the flaw of film lower back optical mode set of pieces is hidden.Simultaneously, because the top of some larger-size particles protrudes in coating surface, formation has the curved surface 21 of certain optically focused effect to light, thereby makes this kind optical diffusion sheet have certain light gathering.Liquid crystal indicator fast-developing and in the widespread use of mobile communication equipment demonstration, laptop computer displays, desktop computer display and large scale liquid crystal TV in recent years, performance requirement to optical diffusion membrane in the display device improves day by day, how to improve brightness effectively and illumination uniformity becomes the major issue that people need solve.
Summary of the invention
Technical matters to be solved by this invention provides a kind of preparation method that can effectively improve the optical diffusion membrane of optics uniformity coefficient and brightness.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of preparation method of optical diffusion membrane, this optical diffusion membrane comprises transparency carrier and is provided with the last diffusion coating of diffusion particle, described transparency carrier is that 1.4～1.75 optically transparent material is made by refractive index, described upward diffusion particle closely contacts each other and is distributed on the described transparency carrier surface, the described diffusion coating of going up is prepared into to apply on described transparency carrier surface behind the dilution coating by diffusion coating and mixing diluents and forms, the quality of the described thinning agent of control is 30%～70% of a described dilution coating gross mass in last diffusion coating preparation process, when thinning agent volatilization and after making the diffusion coating film forming, the described thickness of going up before the diffusion coating film forming is described 1～3 times of going up diffusion particle perpendicular to the biggest size of element of described transparency carrier, and the described thickness of going up after the diffusion coating film forming is that the described diffusion particle of going up is perpendicular to 1/2～7/8 of the biggest size of element of described transparency carrier.
Described transparency carrier is by a kind of the making among glass, PET, PC, PMMA and the PS, described diffusion coating is a kind of in esters of acrylic acid, polyurethanes, the silicone based or organic multicomponent alcohols, and described thinning agent is one or more the potpourri in ethyl acetate, butyl acetate, acetone, water, toluene, dimethylbenzene, butanone, cyclohexanone, ethanol, isopropyl alcohol and the butanols.
The described diffusion particle of going up comprises macroparticle and small-particle, the biggest size of element of described macroparticle is 1～100 micron, the biggest size of element of described small-particle is 0.1～50 micron, the physical dimension that described macroparticle is parallel to described transparency carrier surface direction is 2: 1～100: 1 with the ratio that described small-particle is parallel to the physical dimension of described transparency carrier surface direction, and described macroparticle and described small-particle are spaced.
The described diffusion particle of going up is shaped as sphere or spheroid shape.
Be provided with on the lower surface of described transparency carrier and have the anti-bonding coating of pattern structure, be provided with anti-bonding particle in the described anti-bonding coating, described anti-bonding particle does not contact mutually and disperses to be arranged on the lower surface of described transparency carrier, and the shared area sum of described anti-bonding particle prevents that with described the ratio of the area of bonding coating is 1/1000～1/100.
Compared with prior art, the invention has the advantages that by being controlled at the quality of thinning agent in the diffusion coating preparation process, when thinning agent volatilization and after making the diffusion coating film forming, its thickness strictly is controlled in 1/2～7/8 the scope of diffusion particle perpendicular to the biggest size of element of transparency carrier, thereby improved the light gathering of diffusion film effectively, we learn by comparative experiments, when the quality of thinning agent for dilution coating gross mass 30% ~ 70% the time, brightness is in a higher level, and when the quality of thinning agent be lower than dilution coating gross mass 30% or be higher than dilution coating gross mass 70% the time brightness all be the situation of decline, this reason wherein is when amount of diluent is lower than 30%, it is less that particle behind the film-forming protrudes in the part of coating, thereby a little less than causing spotlight effect; And when amount of diluent was too high, diffusion particle was difficult for forming close-packed structure, thereby produced light leakage phenomena, and finally caused the brightness of diffusion barrier material and the reduction of transmittance.Use the liquid crystal indicator of optical diffusion membrane of the present invention, it has less combine component quantity, and has higher optics uniformity coefficient and brightness.
Description of drawings
Fig. 1 is the diagrammatic cross-section of the optical diffusion membrane of prior art;
Fig. 2 is the diagrammatic cross-section of the optical diffusion membrane of the embodiment of the invention one;
Fig. 3 is the embodiment of the invention two diagrammatic cross-sections;
Fig. 4 is the liquid crystal indicator structural representation of the embodiment of the invention three;
Fig. 5 is the liquid crystal indicator structural representation of the embodiment of the invention four;
Fig. 6 is the liquid crystal indicator structural representation of the embodiment of the invention five.
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
Embodiment one: as shown in Figure 2, optical diffusion membrane 100 comprises a transparency carrier 110, a last diffusion coating 120 that includes sphere or elliposoidal macroparticle 140 and sphere or elliposoidal small-particle 150, macroparticle 140 closely contacts distribution each other with small-particle 150 in the last diffusion coating 120, the biggest size of element of macroparticle 140 is 10 microns, the biggest size of element of small-particle 150 is 0.1 micron, the average geometric size that macroparticle 140 is parallel to transparency carrier 110 surface direction is 100: 1 with the ratio that small-particle 150 is parallel to the average geometric size of transparency carrier 110 surface direction, transparency carrier 110 is made by PMMA, last diffusion coating 120 is prepared into to apply on transparency carrier 110 surfaces behind the dilution coating by diffusion coating and mixing diluents and forms, diffusion coating is acrylate, thinning agent is an ethyl acetate, the thinning agent addition was 30% of a coating gross mass when diffusion coating prepared, thickness before last diffusion coating 120 film forming equals in the diffusion coating 120 macroparticle 140 perpendicular to the biggest size of element of transparency carrier 110, thickness after last diffusion coating 120 film forming be in the last diffusion coating 120 macroparticle 140 perpendicular to 3/4 of the maximum geometric diameter of transparency carrier 110, exposed particle is formed with the lens arrangement of spotlight effect, the light 170 that transmits from below is assembled to the center, the lower surface of transparency carrier 110 is provided with the anti-bonding coating 130 with pattern structure, be provided with anti-bonding particle 160 in the anti-bonding coating 130, anti-bonding particle 160 does not contact mutually and disperses to be arranged on the lower surface of transparency carrier 110, and the shared area sum of anti-bonding particle 160 is 1/500 with the ratio of the area of anti-bonding coating 130.
Embodiment two: as shown in Figure 3, the same with embodiment one, optical diffusion membrane 200 comprises a transparency carrier 210, a last diffusion coating 220 that includes sphere or elliposoidal macroparticle 240 and sphere or elliposoidal small-particle 250, macroparticle 240 closely contacts distribution each other with small-particle 250 in the last diffusion coating 220, the biggest size of element of macroparticle 240 is 100 microns, the biggest size of element of small-particle 250 is 50 microns, the average geometric size that macroparticle 240 is parallel to transparency carrier 210 surface direction is 2: 1 with the ratio that small-particle 250 is parallel to the average geometric size of transparency carrier 210 surface direction, transparency carrier 210 is made by PMMA, last diffusion coating 220 is prepared into to apply on transparency carrier 210 surfaces behind the dilution coating by diffusion coating and mixing diluents and forms, diffusion coating is acrylate, thinning agent is an ethyl acetate, the thinning agent addition was 70% of a coating gross mass when diffusion coating prepared, thickness before last diffusion coating 220 film forming be in the last diffusion coating 220 macroparticle 240 perpendicular to 3 times of the biggest size of element of transparency carrier 210, thickness after last diffusion coating 220 film forming be in the last diffusion coating 220 macroparticle 240 perpendicular to 1/2 of the maximum geometric diameter of transparency carrier 210, exposed particle is formed with the lens arrangement of spotlight effect, the light 270 that transmits from below is assembled to the center, the lower surface of transparency carrier 210 is provided with the anti-bonding coating 230 with pattern structure, be provided with anti-bonding particle 260 in the anti-bonding coating 230, anti-bonding particle 260 does not contact mutually and disperses to be arranged on the lower surface of transparency carrier 210, and the shared area sum of anti-bonding particle 260 is 1/100 with the ratio of the area of anti-bonding coating 230.
Embodiment three: as shown in Figure 4, be applied to the example of laptop computer displays for using two-layer optical diffusion membrane.Wherein 410 is fluorescent tube, and 420 is the high-level efficiency reflector plate, and 430 is the transparent light guide plate in the laptop computer displays, and 440 is optical diffusion membrane, and 450 is display panels.
Embodiment four: as shown in Figure 5, use the example of desktop computer display for using two-layer optical diffusion membrane.Wherein, 410 is fluorescent tube, and 420 is the high-level efficiency reflector plate, and 460 is the light guide plate in the desktop computer display, and 440 is optical diffusion membrane, and 450 is display panels.
Embodiment five: as shown in Figure 6, do not use two-layer above optical diffusion membrane to be applied to the example of lcd tv display.Wherein, 410 is fluorescent tube, and 420 is the high-level efficiency reflector plate, and 470 is the diffuser plate in the LCD TV, and 440 is optical diffusion membrane, and 450 is display panels.
Claims (5)
1. the preparation method of an optical diffusion membrane, this optical diffusion membrane comprises transparency carrier and is provided with the last diffusion coating of diffusion particle, described transparency carrier is that 1.4～1.75 optically transparent material is made by refractive index, described upward diffusion particle closely contacts each other and is distributed on the described transparency carrier surface, the described diffusion coating of going up is prepared into to apply on described transparency carrier surface behind the dilution coating by diffusion coating and mixing diluents and forms, the quality that it is characterized in that the described thinning agent of control in last diffusion coating preparation process is 30%～70% of a described dilution coating gross mass, when thinning agent volatilization and after making the diffusion coating film forming, the described thickness of going up before the diffusion coating film forming is described 1～3 times of going up diffusion particle perpendicular to the biggest size of element of described transparency carrier, and the described thickness of going up after the diffusion coating film forming is that the described diffusion particle of going up is perpendicular to 1/2～7/8 of the biggest size of element of described transparency carrier.
2. the preparation method of a kind of optical diffusion membrane as claimed in claim 1, it is characterized in that described transparency carrier is by a kind of the making among glass, PET, PC, PMMA and the PS, described diffusion coating is a kind of in esters of acrylic acid, polyurethanes, the silicone based or organic multicomponent alcohols, and described thinning agent is one or more the potpourri in ethyl acetate, butyl acetate, acetone, water, toluene, dimethylbenzene, butanone, cyclohexanone, ethanol, isopropyl alcohol and the butanols.
3. the preparation method of a kind of optical diffusion membrane as claimed in claim 1, it is characterized in that the described diffusion particle of going up comprises macroparticle and small-particle, the biggest size of element of described macroparticle is 1～100 micron, the biggest size of element of described small-particle is 0.1～50 micron, the physical dimension that described macroparticle is parallel to described transparency carrier surface direction is 2: 1～100: 1 with the ratio that described small-particle is parallel to the physical dimension of described transparency carrier surface direction, and described macroparticle and described small-particle are spaced.
4. the preparation method of a kind of optical diffusion membrane as claimed in claim 1 is characterized in that the described diffusion particle of going up is shaped as sphere or spheroid shape.
5. the preparation method of a kind of optical diffusion membrane as claimed in claim 1, it is characterized in that being provided with on the lower surface of described transparency carrier and have the anti-bonding coating of pattern structure, be provided with anti-bonding particle in the described anti-bonding coating, described anti-bonding particle does not contact mutually and disperses to be arranged on the lower surface of described transparency carrier, and the shared area sum of described anti-bonding particle prevents that with described the ratio of the area of bonding coating is 1/1000～1/100.
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| CN2008100631272A CN101329416B (en) | 2008-07-11 | 2008-07-11 | Preparation method of optical diffusion thin film |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012027973A1 (en) * | 2010-08-31 | 2012-03-08 | 宁波激智新材料科技有限公司 | Anti-abrasion optical diffusion film, lcd device and light source |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101851414B (en) * | 2010-04-15 | 2012-10-10 | 宁波激智新材料科技有限公司 | Composition applied to optical diffusion membrane, optical diffusion membrane and liquid crystal display device |
| CN102043174B (en) * | 2010-11-05 | 2013-05-29 | 宁波激智新材料科技有限公司 | Microlens array film, preparation method thereof and LCD (Liquid Crystal Display) device |
| CN102928902B (en) * | 2012-11-15 | 2015-07-08 | 福建捷联电子有限公司 | Anti-static transparent base layer and anti-static optical diffusion sheet |
| CN114578465B (en) * | 2022-04-08 | 2022-08-26 | 绍兴翔宇绿色包装有限公司 | PET-based diffusion film and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012027973A1 (en) * | 2010-08-31 | 2012-03-08 | 宁波激智新材料科技有限公司 | Anti-abrasion optical diffusion film, lcd device and light source |
| US9004709B2 (en) | 2010-08-31 | 2015-04-14 | Ningbo Exciton Technology Co., Ltd. | Anti-abrasion optical diffusion film, LCD device and lighting device |
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| CN101329416A (en) | 2008-12-24 |
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Owner name: NINGBO JIZHI TECHNOLOGY CO., LTD. Free format text: FORMER NAME: NINGBO EXCITON NEW MATERIAL TECHNOLOGY CO., LTD. |
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Address after: 315040, Lingyun Industrial Park, No. 1177 Lingyun Road, Ningbo high tech Zone, Zhejiang, 5 Patentee after: Ningbo Exciton Technology Co., Ltd. Address before: 315040, Lingyun Industrial Park, No. 1177 Lingyun Road, Ningbo high tech Zone, Zhejiang, 5 Patentee before: Ningbo Exciton New Material Technology Co., Ltd. |
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Address after: 315040, No. 9, Jingyuan Road, hi tech Zone, Zhejiang, Ningbo Patentee after: Ningbo Exciton Technology Co., Ltd. Address before: 315040, Lingyun Industrial Park, No. 1177 Lingyun Road, Ningbo high tech Zone, Zhejiang, 5 Patentee before: Ningbo Exciton Technology Co., Ltd. |