CN102107175B - Manufacturing method of light dispersion plate - Google Patents
Manufacturing method of light dispersion plate Download PDFInfo
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- CN102107175B CN102107175B CN2011100461803A CN201110046180A CN102107175B CN 102107175 B CN102107175 B CN 102107175B CN 2011100461803 A CN2011100461803 A CN 2011100461803A CN 201110046180 A CN201110046180 A CN 201110046180A CN 102107175 B CN102107175 B CN 102107175B
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- diffusing sheet
- light diffusing
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Abstract
The invention belongs to the field of light dispersion plate manufacturing, and particularly relates to a method for manufacturing a light dispersion layer by spraying a phosphor powder-containing silica gel liquid to a light dispersion plate through an air jet printing process. The method comprises the following steps: a phosphor powder-containing silica gel liquid is prepared, and then the phosphor powder-containing silica gel liquid is uniformly applied to a surface of a light dispersion plate so that the phosphor powder-containing silica gel liquid spontaneously crystallizes on the light dispersion plate to form a light dispersion layer; and the light dispersion layer is sintered to obtain the light dispersion plate with the light dispersion layer, wherein the mass percentage of silica gel in the phosphor powder-containing silica gel liquid ranges from 10% to 30%, the mass percentage of phosphor powders in the phosphor powder-containing silica gel liquid ranges from 1% to 10%, and the mass percentage of organic solvents in the phosphor powder-containing silica gel liquid ranges from 60% to 98%. The method for uniformly applying the phosphor powder-containing silica gel liquid to the surface of the light dispersion plate is the air jet printing process. The light dispersion plate with the light dispersion layer is manufactured with a high efficiency and is superior in stability and aging resistance.
Description
Technical field
The invention belongs to light diffusing sheet and make field, be specifically related to a kind ofly adopt silica gel solution that the air-flow jet printing method will contain fluorescent material to be ejected into light diffusing sheet to make the method for light diffusion layer.
Background technology
At present the LED-backlit general fashion be day inferiorization company (Nichia) by the whole world maximum LED factory Japan monopolize coating can be by blue-light excited yellow fluorescent powder on the blue led wafer, namely with the blue light single-chip, add that the YAG yellow fluorescent powder mixes the generation white light, apply fluorophor on the blue led chip, will seal around chip with epoxy resin finally.Principle is the complementary white light that forms of gold-tinted that the blue light that sends by wafer and fluorescent material send.The method can obtain the good (Ra of tonal effect
85) white light.The shortcoming of the method is exactly Ce in this fluorophor
3+The emission spectrum of ion is not had a continuous spectrum characteristic, and therefore, colour rendering is poor, luminous efficiency is not high enough, is difficult to meet the demand of low colour temperature illumination.
At present, the light diffusing sheet manufacture method roughly is divided into two kinds of printing-type and non-printing-types.Wherein, non-mode of printing is mainly to adopt the modes such as chemical etching or mechanical scratching to make the site form on the metal die, recycling plastic injection forming light diffusing sheet, main way is injection molding, for example: the PC light diffusing sheet is when producing the PC force-bearing plate, adds in raw material that the diffusant of 2%～5% ratio is prepared from by injection molding; Diffusant can be evenly distributed in sheet material, makes light when the sheet material, reflect while encountering the diffusant particle, reflection, the effect of scattering, thereby make light can be uniformly through sheet material but can not expose light source, reach the variation from spot light to area source.This mode has the following advantages: 1, can adopt fluorescent material just can utilize the high advantage of some wave band LED luminous efficiency to prepare the LED of its all band, to improve the luminous efficiency of this wave band.The site precision of 2, making is high than screen printing mode, but also comes with some shortcomings, and for example: when making the large scale light diffusing sheet, the manufacture difficulty of mould is very big, makes the price of product promote.The common ground of the above each mode is all to carry out site to make on the flat substrates of certain size simultaneously, and production efficiency is restricted.
In prior art, light diffusing sheet in the large tracts of land backlight module adopts silk screen print method to make, the step of silk screen print method comprises: the silica gel solution that will have astigmatic characteristic is printed on the light diffusing sheet substrate, then carrying out ultraviolet (UV) and thermalization and fix, is the technique of comparative maturity in application at present.Yet, due to screen printing process be artificial with the silica gel solution net-point printing on the light diffusing sheet substrate of hard transparent, belong to by part production.Therefore, not only human cost expends greatly, and because silk screen site in printing process is easy to stop up, the serigraphy quality is wayward, and the network blocking phenomenon often occurs, thereby has reduced make efficiency.In addition,, because the precision of serigraphy site itself is limited, can't realize that more accurate site makes.
In addition, smooth dispersion solutions existence and stability of the prior art is not good enough and easy to be aging etc. not enough.
Summary of the invention
The manufacture method that the purpose of this invention is to provide a kind of light diffusing sheet, to realize high make efficiency, high stability and the resistance to ag(e)ing of light diffusing sheet.
For achieving the above object, the technical solution used in the present invention is: a kind of manufacture method of light diffusing sheet, comprise the following steps: configuration contains the silica gel solution of fluorescent material, the silica gel solution that then will contain fluorescent material evenly is arranged on the light diffusing sheet surface, make this silica gel solution spontaneous crystallization that fluorescent material is arranged, form light diffusion layer; The sintering light diffusion layer, obtain having the light diffusing sheet of fluorescent material light diffusion layer; Wherein, in the described silica gel solution that contains fluorescent material, the mass percent of silica gel is 10～30%, and the mass percent of fluorescent material is 1～10%, and the mass fraction of organic solvent is 60～89%, and in described fluorescent material, the mass ratio of RGB fluorescent material is 1: 5～7: 2.5～3.5; The method that the described silica gel solution that will contain fluorescent material evenly is arranged on the light diffusing sheet surface is air-flow spray printing method, specifically comprise the following steps: use air-flow spray printing (Aerosol jet) printer, it is 1～5mm from the distance of light diffusing sheet that the micropore syringe needle is set, make the silica gel solution that contains fluorescent material form aerosol by ultrasonic or Pneumatic method, and take inert gas as carrier gas, take aerosol to shower nozzle, with the micropore syringe needle, that the even spray printing of aerosol is surperficial at light diffusing sheet.
In technique scheme, the process that makes the silica gel solution that contains fluorescent material form aerosol by ultrasonic method is: utilize frequency at 20KHz～200MHz ultrasonic atomization silica gel solution, form the silica gel solution aerosol; And while adopting the ultrasonic method atomization, the parameter of air-flow spray printing method is: circling gas flow 10～200ccm; Send fog stream: 5～50ccm; Ultrasonic power: 5～40w; Spray printing speed: 0.1～5mm/sec.
In technique scheme, the process that makes the silica gel solution that contains fluorescent material form small aerosol by Pneumatic method is: utilize the pneumatic generation silica gel solution spraying of Compressed Gas; And while adopting the pneumatic process atomization, the parameter of air-flow spray printing method is: circling gas flow: 10～200ccm; Reflux airflow: 400～2000ccm; Send fog stream: 405～2000ccm; Spray printing speed: 1～5mm/sec.
In technique scheme, take inert gas as carrier gas, aerosol is taken in the process of shower nozzle, the air pressure of described inert gas is 0.01～0.35bar.
In technique scheme, because the micropore syringe needle is 1～5mm from the distance of light diffusing sheet, therefore, also have inert gas around the silica gel solution aerosol in the syringe needle part, thereby make the air-flow of light diffusing sheet outgoing even, and the raising precision, thereby improve the utilization rate of light and reduce product cost; Simultaneously, because the air-flow spray printing can be regulated the ink that parameter can make spray printing, form uniform organic film, simultaneously because this organic film is comprised of micron-sized aerosol ink, in the spray printing process, solution is all volatilizations almost.
In technique scheme, the principle of described spontaneous crystallization is: when light diffusion layer forms,, because the external force (as centrifugal force) that does not hinder crystallization at predetermined direction occurs, therefore allow to contain the spontaneous crystallization of the light diffusing sheet of light diffusion layer;
In technique scheme, described light diffusion layer sintering process generally adopts UV or laser treatment, controls light intensity, is beneficial to the motion of silica gel solution, thereby improves the crystallization rate of light diffusion layer; In addition, laser is radiation partly, can select better to form figure.
In technique scheme, in step 3, sintering process can be used laser treatment, and the energy that can control laser moves on the light diffusion layer that forms to be conducive to solution, thereby increases crystallization rate.
Due to the application of technique scheme, the present invention compared with prior art has the following advantages:
1, because adopting the silica gel solution that air-flow spray printing technology will contain fluorescent material, the present invention is ejected into light diffusing sheet making light diffusion layer, air-flow spray printing method is compared with existing printing or non-printing technology, do not need arrowhead, therefore, can be suitable for the light diffusing sheet of various sizes, especially have advantages of that production efficiency is high when making the large scale light diffusing sheet; And the air-flow spray printing adaptability of technology is good: can various just, print pattern on flexibility and Non-planar substrates; The materials such as applicable various metals, inorganic oxide, organic material; The range of viscosities very large (0.7～1000cps) of the applicable silica gel solution that contains fluorescent material.
2, the air-flow spray printing of the present invention's employing can make fluorescent powder silica gel solution form the aerosol injection, evenly be injected in (minimum feature can reach 5～30 μ m) on the light diffusing sheet surface, make the light of light diffusing sheet outgoing even, can improve the utilization rate of light, and realized the high make efficiency of light diffusing sheet reducing product cost.
3, the present invention has adopted the silica gel solution that contains fluorescent material, has realized high stability and the resistance to ag(e)ing of light diffusing sheet.
Description of drawings
Fig. 1 is the atomization process schematic diagram of silica gel solution in embodiment;
Fig. 2 is that in embodiment, the silica gel solution after atomization is transferred to the process schematic diagram at nozzle place with gas carrier under the environment of the air pressure of 0.01～0.35bar.
The specific embodiment
Embodiment one: a kind of method of making light diffusing sheet comprises the following steps:
(1) preparation contains the silica gel solution of fluorescent material: mix silica gel 15wt%, and fluorescent material 5wt% and carbon tetrachloride 80wt%, wherein, in described fluorescent material, the mass ratio of RGB fluorescent material is 1: 6: 3.
(2) as Fig. 1, shown in 2, use air-flow spray printing (Aerosol jet) printer, it is 3mm from the distance of light diffusing sheet that the micropore syringe needle is set, the spray printing parameter is set: circling gas flow 50 ccm, send fog stream 20 ccm, ultrasonic power 27.5w, supersonic frequency 200MHz, spray printing speed 1 mm/sec, make the silica gel solution that contains fluorescent material form aerosol by ultrasonic method, and the nitrogen take pressure as 0.21bar takes aerosol to shower nozzle as carrier gas, with the micropore syringe needle, that the even spray printing of aerosol is surperficial at light diffusing sheet, according to actual conditions, graphic file need to be set, and, can immediately design with AutoCAD, revise pattern.
(3) make the silica gel solution spontaneous crystallization that contains fluorescent material of light diffusing sheet, form light diffusion layer; The sintering light diffusion layer, obtain being provided with the light diffusing sheet of fluorescent material light diffusion layer.
Embodiment two: a kind of method of making light diffusing sheet comprises the following steps:
(1) contain the silica gel solution of fluorescent material according to the method preparation of embodiment one step (1), wherein, silica gel 10wt%, fluorescent material 1wt%, carbon tetrachloride 89wt%, the mass ratio of RGB fluorescent material are 1:6:3.
(2) as shown in Figure 1, 2, use air-flow spray printing (Aerosol jet) printer, it is 3mm from the distance of light diffusing sheet that the micropore syringe needle is set, and the spray printing parameter is set: circling gas flow 40 ccm; Send fog stream: 10ccm; Ultrasonic power: 27.5 w; Spray printing speed: 0.5mm/sec; By utilizing frequency to contain the light diffusion ink of fluorescent material at the 30KHz ultrasonic atomization, form small aerosol, and the nitrogen take pressure as 0.1bar brings it to shower nozzle as carrier gas, with the micropore syringe needle, that its even spray printing is surperficial at light diffusing sheet, according to actual conditions, graphic file need to be set, and, can immediately design with AutoCAD, revise pattern.
(3) silica gel solution of spray printing spontaneous crystallization on light diffusing sheet, and then form light diffusion layer; With laser treatment sintering light diffusion layer: the energy of controlling laser moves on the light diffusion layer that forms to be conducive to solution, thereby increases crystallization rate.
Embodiment three: a kind of method of making light diffusing sheet comprises the following steps:
(1) contain the silica gel solution of fluorescent material according to the method preparation of embodiment one step (1), wherein, silica gel 18wt%, fluorescent material 2wt%, carbon tetrachloride 80wt%, wherein the mass ratio of RGB fluorescent material is 1:6:3;
(2) as shown in Figure 1, 2, use air-flow spray printing (Aerosol jet) printer, it is 2mm from the distance of light diffusing sheet that the micropore syringe needle is set, and the spray printing parameter is set: circling gas flow: 50 ccm; Send fog stream: 20 ccm; Ultrasonic power: 27.5w; Spray printing speed: 1 mm/sec; By utilizing frequency to contain the light diffusion ink of fluorescent material at the 800KHz ultrasonic atomization, form small aerosol, the inert gas that is 0.3bar by pressure brings it to shower nozzle, with the micropore syringe needle, that its even spray printing is surperficial at light diffusing sheet, according to actual conditions, graphic file need to be set, and, can immediately design with AutoCAD, revise pattern.
(3) silica gel solution of spray printing spontaneous crystallization on light diffusing sheet, and then form light diffusion layer; With laser treatment sintering light diffusion layer: the energy of controlling laser moves on the light diffusion layer that forms to be conducive to solution, thereby increases crystallization rate.
Embodiment four: a kind of method of making light diffusing sheet comprises the following steps:
(1) contain the silica gel solution of fluorescent material according to the method preparation of embodiment one step (1), wherein, silica gel 30wt%, fluorescent material 10wt%, carbon tetrachloride 60wt%, the mass ratio of RGB fluorescent material are 1:6:3;
(2) as shown in Figure 1, 2, use air-flow spray printing (Aerosol jet) printer, it is 2mm from the distance of light diffusing sheet that the micropore syringe needle is set, and the spray printing parameter is set: circling gas flow 200ccm; Send fog stream: 50ccm; Ultrasonic power: 40w; Spray printing speed: 5 mm/sec; By utilizing frequency to contain the light diffusion ink of fluorescent material at the 200MHz ultrasonic atomization, form small aerosol, the inert gas that is 0.05bar by pressure brings it to shower nozzle, with the micropore syringe needle, that its even spray printing is surperficial at light diffusing sheet, according to actual conditions, graphic file need to be set, and, can immediately design with AutoCAD, revise pattern.
(3) silica gel solution of spray printing spontaneous crystallization on light diffusing sheet, and then form light diffusion layer; With laser treatment sintering light diffusion layer: the energy of controlling laser moves on the light diffusion layer that forms to be conducive to solution, thereby increases crystallization rate.
Embodiment five: a kind of method of making light diffusing sheet comprises the following steps:
(1) contain the silica gel solution of fluorescent material according to the method preparation of embodiment one step (1), wherein, silica gel 14wt%, fluorescent material 6wt%, carbon tetrachloride 80wt%, the mass ratio of RGB fluorescent material are 1:6:3;
(2) as shown in Figure 1, 2, use air-flow spray printing (Aerosol jet) printer, it is 4mm from the distance of light diffusing sheet that the micropore syringe needle is set, and the spray printing parameter is set: circling gas flow: 10ccm; Reflux airflow: 400ccm; Send fog stream: 500ccm; Spray printing speed: 1mm/sec; Make the light diffusion ink that contains fluorescent material form small aerosol by pneumatic nebulization, the inert gas that is 0.35bar by pressure brings it to shower nozzle, with the micropore syringe needle with its even spray printing on the light diffusing sheet surface, according to actual conditions, graphic file need to be set, and, can immediately design with AutoCAD, revise pattern.
(3) silica gel solution of spray printing spontaneous crystallization on light diffusing sheet, and then form light diffusion layer; With laser treatment sintering light diffusion layer: the energy of controlling laser moves on the light diffusion layer that forms to be conducive to solution, thereby increases crystallization rate.
Embodiment six: a kind of method of making light diffusing sheet comprises the following steps:
(1) contain the silica gel solution of fluorescent material according to the method preparation of embodiment one step (1), wherein, silica gel 21wt%, fluorescent material 9wt%, carbon tetrachloride 70wt%, the mass ratio of RGB fluorescent material are 1:6:3;
(2) as shown in Figure 1, 2, use air-flow spray printing (Aerosol jet) printer, it is 5mm from the distance of light diffusing sheet that the micropore syringe needle is set, and the spray printing parameter is set: circling gas flow: 60ccm; Reflux airflow: 470ccm send fog stream: 490ccm; Spray printing speed: 1mm/sec; Make the light diffusion ink that contains fluorescent material form small aerosol by pneumatic nebulization, the inert gas that is 0.01bar by pressure brings it to shower nozzle, with the micropore syringe needle with its even spray printing on the light diffusing sheet surface, according to actual conditions, graphic file need to be set, and, can immediately design with AutoCAD, revise pattern.
(3) silica gel solution of spray printing spontaneous crystallization on light diffusing sheet, and then form light diffusion layer; With laser treatment sintering light diffusion layer: the energy of controlling laser moves on the light diffusion layer that forms to be conducive to solution, thereby increases crystallization rate.
Claims (5)
1. the manufacture method of a light diffusing sheet, comprise the following steps: configuration contains the silica gel solution of fluorescent material, the silica gel solution that then will contain fluorescent material evenly is arranged on the light diffusing sheet surface, makes the silica gel solution spontaneous crystallization that contains fluorescent material of light diffusing sheet, forms light diffusion layer, laser sintered light diffusion layer, obtain being provided with the light diffusing sheet of fluorescent material light diffusion layer, wherein, in the described silica gel solution that contains fluorescent material, the mass percent of silica gel is 10～30%, the mass percent of fluorescent material is 1～10%, the mass fraction of organic solvent is 60～89%, the method that the described silica gel solution that will contain fluorescent material evenly is arranged on the light diffusing sheet surface is air-flow spray printing method, specifically comprise the following steps: use air-flow spray printing printer, it is 1～5mm from the distance of light diffusing sheet that the micropore syringe needle is set, make the silica gel solution that contains fluorescent material form aerosol by ultrasonic or Pneumatic method, and take inert gas as carrier gas, take aerosol to shower nozzle, with the micropore syringe needle, that the even spray printing of aerosol is surperficial at light diffusing sheet.
2. the manufacture method of light diffusing sheet according to claim 1, is characterized in that, in described fluorescent material, the mass ratio of RGB fluorescent material is 1: 5～7: 2.5～3.5.
3. the manufacture method of light diffusing sheet according to claim 1, it is characterized in that, the process that makes the silica gel solution that contains fluorescent material form aerosol by ultrasonic method is: utilize frequency at 20KHz～200MHz ultrasonic atomization silica gel solution, form the silica gel solution aerosol; And while adopting the ultrasonic method atomization, the parameter of air-flow spray printing method is: circling gas flow 10～200ccm; Send fog stream: 5～50ccm; Ultrasonic power: 5～40w; Spray printing speed: 0.1～5mm/sec.
4. the manufacture method of light diffusing sheet according to claim 1, is characterized in that, the process that makes the silica gel solution that contains fluorescent material form small aerosol by Pneumatic method is: utilize the pneumatic generation silica gel solution spraying of Compressed Gas; And while adopting the pneumatic process atomization, the parameter of air-flow spray printing method is: circling gas flow: 10～200ccm; Reflux airflow: 400～2000ccm; Send fog stream: 405～2000ccm; Spray printing speed: 0.1～5mm/sec.
5. the manufacture method of light diffusing sheet according to claim 1, is characterized in that, take inert gas as carrier gas, aerosol is taken in the process of shower nozzle, the air pressure of described inert gas is 0.01～0.35bar.
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| CN105805699B (en) * | 2014-12-30 | 2019-01-08 | 深圳市光峰光电技术有限公司 | The preparation method of Wavelength converter |
| WO2017197568A1 (en) * | 2016-05-17 | 2017-11-23 | 蔡文珍 | High color gamut light diffusing sheet and production process therefor |
| CN114236657B (en) * | 2021-12-30 | 2022-10-14 | 广东欧迪明光电科技股份有限公司 | Production process of quantum dot light diffusion plate with harmful blue light blocking function |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1795996A (en) * | 2004-12-30 | 2006-07-05 | 刘大佼 | Die set for coextrusion coat, and method for coextrusion coating two kinds of coats |
| CN101783340A (en) * | 2010-02-02 | 2010-07-21 | 陕西科技大学 | LED backlight integration and encapsulation structure and encapsulation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20070103931A1 (en) * | 2005-11-09 | 2007-05-10 | Kun-Chui Lee | Assembly device for a sidelight light source module and liquid crystal panel |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1795996A (en) * | 2004-12-30 | 2006-07-05 | 刘大佼 | Die set for coextrusion coat, and method for coextrusion coating two kinds of coats |
| CN101783340A (en) * | 2010-02-02 | 2010-07-21 | 陕西科技大学 | LED backlight integration and encapsulation structure and encapsulation method |
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