CN1234046C - Microbead type back projection screen and its production method - Google Patents
Microbead type back projection screen and its production method Download PDFInfo
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- CN1234046C CN1234046C CN 01136968 CN01136968A CN1234046C CN 1234046 C CN1234046 C CN 1234046C CN 01136968 CN01136968 CN 01136968 CN 01136968 A CN01136968 A CN 01136968A CN 1234046 C CN1234046 C CN 1234046C
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- rete
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Abstract
The present invention relates to a microbead type back projection screen which comprises a transparent bottom plate, a transparent film layer, a lightproof film layer, a micro glass bead single particle layer and a focusing protective film layer, wherein the transparent bottom plate is made of glass or transparent resin materials comprising polyester, polyurethane or polymethyl methacrylate; the transparent film layer in which light transmission dye is mixed or not mixed is arranged on one side of the transparent bottom plate and uses acrylic resin as a film-forming agent; the lightproof film layer comprising light absorption and resistance materials made of black printing ink, black or blue to dark blue dye, carbon black, graphite, titanium dioxide or a mixture thereof is arranged on the transparent film layer, wherein a film-forming agent is made of polyester and polyurethane; the micro glass bead single particle layer is embedded between the transparent film layer and the lightproof film layer, the total thickness of the two layers is 0.5 to 0.7 time of the diameter of a microbead, the refractivity of a micro glass bead is from 1.8 to 2.1, the particle diameter is from 60 to 74 mu m, the circular degree is larger than or equal to 95%, and the transparent microbead ratio is larger than or equal to 95%; the focusing protective film layer is arranged on the lightproof film layer and the micro glass bead single particle layer, a film-forming agent of which is polyvinyl butyral.
Description
Technical field
The present invention relates to microbead type back projection screen.More particularly, the present invention relates to do the rear projection screen of printing opacity amplified material with glass microballoon.The invention still further relates to the manufacture method of this rear projection screen.
Background technology
Various types of rear projection screens are provided in the prior art, for example frosted glass formula rear projection screen, Fresnel lens type rear projection screen, microbead type back projection screen or the like.Wherein, frosted glass formula rear projection screen luminance difference, sharpness is low; Though Fresnel lens type rear projection screen effect is than frosted glass formula rear projection screen brightness height, sharpness increases, but still keeps away the color incongruity that chromatic dispersion causes due to unavoidable interline flicker and the prism effect.
Microbead type back projection screen just sees the document record as far back as the eighties of last century initial stage forties, for example U.S. Pat 2,378, narrated a kind of printing opacity screen or rear projection screen in 252, this screen comprises monofilm layer extinction rete, a plurality of refractive power spherula on printing opacity supporting mass, side of supporting mass.Used refractive power spherula be glass pellet body, natural resin spherula or synthetic resin (for example polymethylmethacrylate) spherula as light transmissive material, spherular diameter is different because of the size of screen itself, generally at 3 μ m between some mm scopes.This screen not only can use under dark surrounds, and can use under bright light environments.But, under the bright conditions, projection light source intensity must be than strong 20 times under the dark condition.
Recent decades, for various reasons, with high costs due to the residing state of the art of microballon production method for example, the structure of microbead type back projection screen and some technological difficulties of manufacture method aspect fail to satisfactorily resolve or the like, make it to fail to be used widely.
U.S. Pat 5,563 has been put down in writing a kind of manufacture method of microbead type back projection screen in 738, wherein glass microballoon is anchored on the transparent base with the black non transparent binder, and particle size distribution range is wide, and this method is simple to operate, does not need complex apparatus.Yet, be not able to widespread use with some technical reasons owing to production cost is high yet.
U.S. Pat 6,204, put down in writing a kind of rear projection screen in 971, this screen still is three film layer structures, be dianegative, opaque bonding rete and be embedded in glass microballoon individual particle layer in the opaque bonding rete, wherein used microballon is the simple glass microballon, and its refractive index is not more than 1.70 (1.5～1.7).Because the refractive index of used microballon is little, cause the rear projection screen gain that makes low, the brightness and the sharpness of image all have much room for improvement.
Summary of the invention
Therefore, technical matters to be solved by this invention is intended to overcome above-mentioned the deficiencies in the prior art part, and a kind of high resolving power, high-gain, no chromatic dispersion, microbead type back projection screen that color is soft naturally are provided.
The microbead type back projection screen that foregoing invention purpose of the present invention is passed through to be provided solves, and this microbead type back projection screen is characterised in that described screen comprises dianegative, transparent film layer, light tight rete, glass microballoon individual particle layer and focusing protective film; Described dianegative is selected from glass or comprises the transparent resin material of polyester, polyurethane or polymethylmethacrylate; Described transparent film layer is located at a side of dianegative, and it is film forming agent with the acrylic resin, admixture or admixture light transmission dyestuff not; Described light tight rete is located on the transparent film layer, and wherein film forming agent is selected from polyester, polyurethane, contains in the rete to be selected from black ink, black or blue extinction resistance luminescent material to mazarine dyestuff, carbon black, graphite, titania or its potpourri and so on; Described glass microballoon individual particle layer is embedded in transparent film layer and the light tight rete, two-layer gross thickness is 0.5 to 0.8 times of bead diameter, the refractive index of used glass microballoon is 1.8～2.1, this glass microballoon is the barium titanate-type glass microballoon, particle diameter is 60～74 μ m, circularity 〉=95%, transparent microballon ratio 〉=95%; Described focusing protective film is located on light tight rete and the glass microballoon individual particle layer, and its film forming agent is a polyvinyl butyral.
The used dianegative of the present invention adopts glass or polyester, polyurethane or polymethylmethacrylate and so on transparent material of transparency 〉=90%.For reducing the reflex of dianegative to surrounding environment light, preferably the opposite side of described relatively each layer is set up one deck antireflective coating on glass or resin.
For obtaining better gain and resolution, the present invention preferably uses mean grain size to be preferably 63～74 μ m, and refractive index is preferably 1.8～1.9 glass microballoon (for example, Huaming, Jinan City, Shandong Province reflectorized material responsibility company limited produces).
In a preferred embodiment of the invention, the film forming agent of described transparent film layer preferably uses the acryl resin of fineness smaller or equal to 10 μ m.
Preferably, when containing conductive powder in the light tight rete, be selected from the light shield layer of black nickel or strong covering power electrophoretic paint with plating or electrophoresis mode plating one deck on light tight rete.
On the other hand, for overcoming weak point of the prior art, the present invention also provides a kind of method of making above-mentioned microbead type back projection screen.
Microbead type back projection screen manufacture method provided by the invention comprises the following steps: to choose the dianegative of a kind of transparency 〉=90%, this dianegative be selected from glass or or comprise the transparent resin material of polyester, polyurethane or polymethylmethacrylate; Be coated with one deck coloured or water white transparency rete and the light tight rete of one deck with serigraphy, roller coating or blade coating mode on described dianegative, the gross thickness of two layers of resin rete equals 0.5～0.8 times of next step used glass microballoon mean diameter; Before described two rete resin film layers solidify, with mean grain size be that 60～74 microns, refractive index are 1.8～1.9, the glass microballoon of circularity 〉=95%, transparent microballon ratio 〉=95% dispenses on the light tight rete, make it to form the individual particle layer and be embedded in transparent film layer and light tight rete in, then resin film layer is cured, makes glass microballoon inlay and be bonded in the two layers of resin rete; On light tight rete of black and glass microballoon rete, be coated with one deck focusing protective film at last with serigraphy, roller coating or blade coating mode.
For reducing the reflex of dianegative to surrounding environment light, the inventive method also is included in the step of opposite side coating one deck antireflective coating of described relatively each layer on glass or the resin.
For the purpose of obtaining better gain and resolution, the present invention is that 63～74 μ m, refractive index are that 1.9 glass microballoon lays described glass microballoon individual particle layer with mean grain size preferably.
When containing conductive powder in the light tight rete, preferably on light tight rete, set up the light shield layer that one deck is selected from black nickel or strong covering power electrophoretic paint with plating or electrophoresis mode.
Beneficial effect of the present invention is: microbead type back projection screen provided by the present invention has the resolution height, the excellent results high, that color is soft naturally gains.According to surveying and determination, resolution is 100, gain 〉=1.5, and diffuse reflection≤3.6%, direct reflection≤0.8%, color are soft naturally not dazzling.So be a kind of projection screen that is of value to human body.
Embodiment
Embodiment 1
Use silk screen print method on a side of clean glass plate, evenly be coated with the transparent fatty acid modified hydroxy propylene acid resin that contains of a rete and be coated with rete, used resin is " extra large Tyke
BP-2 " high richness high-weatherability acryl resin (the bright cold coating of Changzhou company limited produces); Be coated with at this again and in kind apply the above-mentioned resin coating film layer that a rete is mixed with carbon black on the rete; And then, dispense refractive index on the rete (composition of this microballon sees Chinese patent ZL97116915.2 for details to be put down in writing by 1.9 glass microballoon uncured above-mentioned being coated with still, Huaming, Jinan City, Shandong Province reflectorized material responsibility company limited produces), and glass microballoon is pressed into above-mentioned two retes, and (two rete gross thickness are equal to or greater than the radius of microballon, but not exclusively microballon is sunk in it), form single microballon rete; After treating that above-mentioned two rete resin film layers solidify, be coated with a rete polyvinyl butyral transparent resin rete again; In addition, also at the opposite side plating one rete magnesium chloride antireflective coating of glass plate.
Embodiment 2
Repeat each step among the embodiment 1, but replace carbon black, and the use refractive index is 2.1 glass microballoon with one or more materials that are selected from graphite, pitch, coal tar, black dyes and the strong covering power filler.
Embodiment 3
Repeat each step among the embodiment 1, but in the transparent resin rete, add the hyperchromic toner that is selected from blueness, light brown transparency dye and/or titania.
Embodiment 4
Repeat each step among the embodiment 2, but in the transparent resin rete, add the hyperchromic toner that is selected from blueness, light brown transparency dye and/or titania.
Embodiment 5
Repeat each step among the embodiment 1, but replace glass plate with poly (methyl methacrylate) plate.
Claims (4)
1. microbead type back projection screen is comprising dianegative, transparent film layer, light tight rete, glass microballoon individual particle layer and focusing protective film; Described dianegative is selected from glass or comprises the transparent resin material of polyester, polyurethane or polymethylmethacrylate; Described transparent film layer is located at a side of dianegative, and it is film forming agent with the acryl resin, admixture or admixture light transmission dyestuff not; Described light tight rete is located on the transparent film layer, and wherein film forming agent is selected from polyester, polyurethane; Described glass microballoon individual particle layer is embedded in transparent film layer and the light tight rete, and two-layer gross thickness is 0.5 to 0.8 times of bead diameter, and the refractive index of used glass microballoon is 1.8～2.1, and particle diameter is 6O～74 μ m; Described focusing protective film is located on light tight rete and the glass microballoon individual particle layer, it is characterized in that, used glass microballoon is the barium titanate-type glass microballoon, circularity 〉=95%, transparent microballon ratio 〉=95%; Contain in the rete of described light tight rete and be selected from black ink, black or blue extinction resistance luminescent material to mazarine dyestuff, carbon black, graphite, titania or its potpourri; The film forming agent of described focusing protective film is a polyvinyl butyral.
2. microbead type back projection screen as claimed in claim 1 is characterized in that, when containing conductive powder in the light tight rete, is selected from the light shield layer of black nickel or strong covering power electrophoretic paint with plating or electrophoresis mode plating one deck on light tight rete.
3. the manufacture method of microbead type back projection screen, this method comprises the following steps: to choose the dianegative of a kind of transparency 〉=90%, and this dianegative is selected from glass or comprises the transparent resin material of polyester, polyurethane or polymethylmethacrylate; Coloured or water white transparency rete and the light tight rete of one deck of coating one deck on described dianegative, the gross thickness of this two layers of resin rete equals 0.5～0.8 times of next step used glass microballoon mean diameter; Before described two layers of resin rete solidifies, with mean grain size be that 60～74 microns, refractive index are 1.8～1.9, the glass microballoon of circularity 〉=95%, transparent microballon ratio 〉=95% dispenses on the light tight rete, make it to form the individual particle layer and be embedded in transparent film layer and light tight rete in, then resin film layer is cured, makes glass microballoon inlay and be bonded in the two layers of resin rete; Coating one deck focusing protective film on light tight rete of black and glass microballoon rete is characterized in that transparent film layer, light tight rete and focusing protective film all are coated with screen printing mode at last.
4. as the manufacture method of microbead type back projection screen as described in the claim 3, it is characterized in that, when containing conductive powder in the light tight rete, to electroplate or electrophoresis mode plating one deck on light tight rete is selected from the light shield layer of black nickel or strong covering power electrophoretic paint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01136968 CN1234046C (en) | 2001-12-26 | 2001-12-26 | Microbead type back projection screen and its production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01136968 CN1234046C (en) | 2001-12-26 | 2001-12-26 | Microbead type back projection screen and its production method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1428649A CN1428649A (en) | 2003-07-09 |
| CN1234046C true CN1234046C (en) | 2005-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01136968 Expired - Fee Related CN1234046C (en) | 2001-12-26 | 2001-12-26 | Microbead type back projection screen and its production method |
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| CN (1) | CN1234046C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1990095A1 (en) * | 2006-02-27 | 2008-11-12 | Toray Industries, Inc. | Method for producing powder particle by using grinding medium |
| JP5872206B2 (en) * | 2011-08-24 | 2016-03-01 | スリーエム イノベイティブ プロパティズ カンパニー | Projection system |
| JP5900504B2 (en) * | 2011-09-28 | 2016-04-06 | 大日本印刷株式会社 | Printing sheet and multi-function projection screen using the same |
| KR101440971B1 (en) * | 2012-01-05 | 2014-09-17 | 주식회사 엘지화학 | Reverse osmosis membrane having a excellent antifouling property and method of preparing the same |
| CN104090458B (en) * | 2014-06-20 | 2016-01-13 | 张家港宝视特影视器材有限公司 | Microballon projection screen and preparation method thereof |
| CN110713794A (en) * | 2018-06-26 | 2020-01-21 | 张家港宝视特影视器材有限公司 | Functional layer coating of projection curtain, projection curtain and manufacturing method |
| CN109266149A (en) * | 2018-08-21 | 2019-01-25 | 陈同宝 | A kind of coating and preparation process spraying rear projection screen on silk screen class substrate |
| CN111635678A (en) * | 2019-05-17 | 2020-09-08 | 亚科维亚(福建)科技有限公司 | Rear projection coating and rear projection screen |
| CN110928132A (en) * | 2019-12-06 | 2020-03-27 | 广东柯视丽科技有限公司 | Back projection imaging pad pasting |
-
2001
- 2001-12-26 CN CN 01136968 patent/CN1234046C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1428649A (en) | 2003-07-09 |
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Granted publication date: 20051228 Termination date: 20101226 |