CN102455449A - Prism-structured brightness enhancement film with anti-scraping property - Google Patents
Prism-structured brightness enhancement film with anti-scraping property Download PDFInfo
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- CN102455449A CN102455449A CN2011104336821A CN201110433682A CN102455449A CN 102455449 A CN102455449 A CN 102455449A CN 2011104336821 A CN2011104336821 A CN 2011104336821A CN 201110433682 A CN201110433682 A CN 201110433682A CN 102455449 A CN102455449 A CN 102455449A
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Abstract
The invention relates to a brightness enhancement film, in particular to a prism-structured brightness enhancement film with an anti-scraping property. The brightness enhancement film comprises a substrate and a prism structure layer, wherein the prism structure layer is arranged on the substrate; the prism structure layer is composed of first prism unit structures and second prism unit structures and each second prism unit structure is provided with a plurality of discontinuous protruding structures; lengths of all the protruding structures on the second prism unit structures are the same and gaps between the adjacent protruding structures on each second prism unit structure are the same; and spaces between at least two pairs of adjacent second prism unit structures are unequal. The prism-structured brightness enhancement film with the anti-scraping property, provided by the invention, has the beneficial effects that the protruding structures of the second prism units can prevent pointed edges from being scraped when films are assembled in the actual application, so as to realize the anti-scraping function. The protruding structures only occupy a part of the second prism unit structures and the other parts are still pointed edge structures. Compared with the prior art, the brightness enhancement film has higher optical gain expression.
Description
Technical field
The invention discloses a kind of bright enhancement film, particularly about a kind of be applied to LCD (liquid crystal display, LCD) have an anti-prism structure bright enhancement film of characteristic of scraping.
Background technology
At present; Bright enhancement film (BEF; Brightness Enhancement Film) the normal bright enhancement film (BEF) of using increases display brightness and the energy of practicing thrift the display battery apparatus in the display devices such as the light that light source is sent, especially monitor to be used for converging to be widely used in illuminating module.The principle of bright enhancement film is through refraction and reflection the light outside the directive observer visual angle to be adjusted within the observer visual angle, has so just improved the utilization factor of luminous energy that light source sends.
Common bright enhancement film (BEF) is to constitute in order to the prism bar that converges light by many, and these prism bar are arranged according to a direction, form a prism array, shown in Figure 1A.Conventional prism structure bright enhancement film in practical application is owing to can be used with other bloomings, and the sharp corners to prism structure causes scratch easily, thereby influences optical quality.In order to address this problem; U.S. Pat 7142767 discloses a kind of anti-brightness enhancement film of scraping function that has, and shown in Figure 1B, this brightness enhancement film comprises base material 1 ' and prism structure layer 2 '; Prism structure layer 2 ' is positioned on the base material 1 '; Its structure is the prism columns of fillet or platform in traditional brightness enhancement film prism array, increasing some tops, and these prism heights are higher than its peripheral ordinary construction prism columns, thereby can play the anti-effect that scratches.Yet this kind structure can cause the decline of optical gain values because cancellation wedge angle in whole prism columns top changes fillet or platform structure into.Therefore, must improve existing prism structure bright enhancement film in order to address the above problem.
Summary of the invention
The technical matters that (one) will solve
The purpose of this invention is to provide a kind of anti-prism structure bright enhancement film of characteristic of scraping that has, in order to converging the light that sends from light source, pass the dispersion angle behind this bright enhancement film with adjustment from the light source emitted light, and improve illuminating module and produce yield.
(2) technical scheme
To achieve these goals, the present invention provides a kind of base material and prism structure layer of comprising, said prism structure layer is positioned on the said base material; This prism structure layer is made up of several the first prism unit structure and second prism unit structures of arranging by same direction; The xsect of the said first prism unit structure is an isosceles triangle, and the said second prism unit structure has some discontinuous bulge-structures on the direction of extension of prism unit; The equal in length of each bulge-structure on said second prism unit; The interval of adjacent bulge-structure equates on each second prism unit; Spacing between at least two second adjacent prism unit is unequal.
Further, the drift angle angle of the said first prism unit structure xsect is 60 °-120 °, highly is H1, and H1 is between 10 μ m-100 μ m.
Further, the non-bossing xsect of described second prism unit is and the identical isosceles triangle of the said first prism unit xsect, and its bossing height is H2, H2 be the said first prism cross-section height H 1 1.05-1.5 doubly.
Further; The non-bossing xsect of described second prism unit is and the identical isosceles triangle of the said first prism unit xsect; Lug boss office xsect is that drift angle is the isosceles triangle of fillet, and said drift angle radius of corner is between 0.5-2 μ m.
Further, the non-bossing xsect of described second prism unit is and the identical isosceles triangle of the said first prism unit xsect that lug boss office xsect is an isosceles trapezoid, the 0.03-0.2 that its upper base edge lengths is a bottom length times.
Further, said base material is selected from a kind of in polyethylene terephthalate and the polymethylmethacrylate, and the material of said prism structure layer is a UV-cured resin.
Further, said UV-cured resin comprises a kind of in epoxy acrylic resin, aminoacrylic acid resin, polyvinyl resin, polyurethane acrylic resin, the polyester acrylic resin.
(3) beneficial effect
Beneficial effect of the present invention is, because the bulge-structure of second prism unit to the scratch of sharp corners, plays anti-function of scraping in the time of can in practical application, avoiding the diaphragm assembling.In addition, because bulge-structure only accounts for the second prism unit part ratio, remainder is sharp-pointed angular structures still, and with respect to prior art, the present invention has higher optical gain performance.
Description of drawings
Figure 1A is the perspective view of conventional prism structure bright enhancement film;
Figure 1B is the anti-perspective view of scraping the prism structure bright enhancement film of tradition;
Wherein, 1 ' is base material, and 2 ' is the prism structure layer;
Fig. 2 is a prism structure bright enhancement film perspective view in the embodiment of the invention 1;
Fig. 3 A is a prism structure bright enhancement film front view in the embodiment of the invention 1;
Wherein, 112A is the first prism structure unit; 112B is the second prism structure unit; H1 is the height of the first prism structure unit, and H2 is the height of the bossing of the second prism structure unit, and R is that the bossing xsect of the second prism structure unit is the radius of the fillet drift angle of isosceles right triangle;
Fig. 3 B is a prism structure bright enhancement film vertical view in the embodiment of the invention 1;
Wherein, L1 is the length of the second prism structure unit raising part, and L2 is the interval of two convex parts adjacent in the second prism structure unit;
Fig. 4 A is the viewing angle distribution curve map that does not increase the common prism vertical direction of film material in the prior art;
Fig. 4 B is the viewing angle distribution curve map that does not increase the common prism horizontal direction of film material in the prior art;
Fig. 4 C is the viewing angle distribution curve map of conventional prism structure brightness enhancement film vertical direction in the prior art;
Fig. 4 D is the viewing angle distribution curve map of conventional prism structure brightness enhancement film horizontal direction in the prior art;
Fig. 4 E is the viewing angle distribution curve map of the brightness enhancement film embodiment of the invention one prism structure vertical direction;
Fig. 4 F is the viewing angle distribution curve map of the brightness enhancement film embodiment of the invention one prism structure horizontal direction;
Fig. 5 is a prism structure bright enhancement film perspective view in the embodiment of the invention two;
Wherein, the 100th, anti-structure bright enhancement film, the 102nd, the base material scraped; The 108th, the prism structure layer, 106 is first optical surfaces, 104 is second optical surfaces; 110B is the direction of extension of prism structure unit; 110A is the orientation of prism structure unit, and 112A is the first prism structure unit, and 112B is the second prism structure unit;
Fig. 6 is a prism structure bright enhancement film front view in the embodiment of the invention two;
Wherein, H1 is the height of the first prism structure unit, and H3 is the height of the bossing of the second prism structure unit, and d is that the bossing xsect of the second prism structure unit is the upper base length of isosceles trapezoid;
Fig. 7 is a prism structure bright enhancement film vertical view in the embodiment of the invention two;
Wherein, L1 is the length of the second prism structure unit raising part, and L2 is the interval of two convex parts adjacent in the second prism structure unit;
Fig. 8 A is the viewing angle distribution curve map of the brightness enhancement film embodiment of the invention two prism structure vertical direction;
Fig. 8 B is the viewing angle distribution curve map of the brightness enhancement film embodiment of the invention two prism structure horizontal directions.
Embodiment
Shown in Fig. 2,3B, the embodiment of the invention has the anti-prism structure bright enhancement film 100 of scraping characteristic and comprises base material 102 and prism structure layer 108.This base material 102 has first optical surface 106 and is positioned at aspectant second optical surface 104 of first optics.Prism structure layer 108 is arranged on first optical surface 106, and this prism structure layer 108 is lined up array by several the first prism unit structure 112A and the second prism structure unit 112B by direction 110A and constituted, and the prism direction of extension is 110B.The second prism unit structure 112B has some discontinuous bulge-structures on the direction of extension of prism unit; The length L 1 of each bulge-structure on the second prism unit 112B equates that L1 is between 50 μ m-500mm, and the interval L2 that each second prism unit 112B goes up adjacent bulge-structure equates that L2 is between 100 μ m～500mm; Spacing L3 between at least two second adjacent prism unit 112B is unequal.On the prism arrangement direction, can whenever one second prism unit 112B be set at a distance from 1～100 first prism unit 112A.
The preparation method of brightness enhancement film is: coating polyethylene resin bed on base material 102 first optical surfaces 106; With having the polyvinyl resin of uV curable is carried out press mold with the mold wheel of the microstructure complementary structure of prism structure layer 108; Can make the polyvinyl resin layer form required microstructure; Use UV-irradiation subsequently again, the UV-cured resin layer that forms microstructure is solidified, thereby prism structure layer 108 is arranged on first optical surface 106 of base material 102.
Shown in Fig. 3 A, first its xsect of prism unit structure 112A is an isosceles right triangle in this prism structure layer 108, and height H 1 is 25 μ m.Have some bulge-structures on the direction of extension of the second prism unit 112B; The second prism unit 112B xsect at non-bossing is and the identical isosceles right triangle of the first prism unit 112A xsect; Highly also be H1; Bossing height H 2 is 27 μ m, and lug boss office xsect is that drift angle is the isosceles right triangle of fillet, and radius of corner R is 1 μ m.
Some bulge-structures among the second prism structure 112B can effectively prevent in the illuminating module production run injury of scratching the sharp-pointed drift angle of first prism structure is caused because of friction with other diaphragms, thereby ensure the production yield of illuminating module.In addition, still comprise the non-dried bulge-structure of part among the second prism structure 112B, this part is the sharp-pointed structure identical with the first prism structure 112A, can avoid the reduction of optical gain.
Shown in Fig. 4 A-4F, be the optical gain of brightness enhancement film among the embodiment 1 and the relatively performance of no film material and traditional structure brightness enhancement film.Wherein: the metering system of briliancy distribution curve is: with the planar light source of a uniformly light-emitting as measurement light source; To test diaphragm is covered on the light source; Use brightness photometer perpendicular alignmnet diaphragm central authorities, define test angle this moment is 0 °, is the center of circle with diaphragm central authorities then; Brightness photometer is distributed in level and several angles of vertical direction rotation, records a series of data and constitute the briliancy scatter chart.It is defined as horizontal direction along the prism unit direction of extension, is defined as vertical direction along the prism arrangement direction; Luminance gain is defined as 1 during no diaphragm.
Can know by Fig. 4 E-4F; Traditional structure brightness enhancement film luminance gain is 1.59; And the luminance gain in the present embodiment 1 is 1.52, do not have obvious decline, and visible angle does not have significant change; Take all factors into consideration the anti-characteristic of scraping of brightness enhancement film according to the invention again, but the brightness enhancement film of knowledge capital invention all has higher advantage aspect optical appearance and the assembly technology.
Shown in Fig. 5-7, the xsect of the first prism unit structure 112A in the present embodiment is an isosceles right triangle, and height H 1 is 25 μ m.The second prism structure bossing xsect is that the base angle is the isosceles trapezoid of 45 degree, and trapezoidal height H 3 is 28 μ m, and the upper base length d is 2 μ m, and is as shown in Figure 6.The material of base material 102 is polymethylmethacrylates, and the material of prism structure layer 108 is the polyurethane acroleic acid fat of uV curable.
The preparation method of brightness enhancement film is: coating ultraviolet light curing resin epoxy acrylic resin on base material 102 first optical surfaces 106; Mold wheel with having with the microstructure complementary structure of prism structure layer 108 is carried out press mold to UV-cured resin; Can make the UV-cured resin layer form required microstructure; Use UV-irradiation subsequently again; The UV-cured resin layer that forms microstructure is solidified, thereby prism structure layer 108 is arranged on first optical surface 106 of base material 102, the cross sectional shape of the bossing of its second prism structure unit is an isosceles trapezoid.Bossing has equal lengths L1 in the prism direction of extension, and L1 is 50 μ m; Any two convex parts adjacent have full equal spacing L2 on the prism direction of extension, and L2 is between 200 μ m; On the prism arrangement direction, whenever one second prism unit 112B is set at a distance from 1～100 first prism unit 112A.
Can know by Fig. 8 A-8B; Compare with traditional structure traditional structure brightness enhancement film luminance gain; Luminance gain in the present embodiment 2 does not have obvious decline; And visible angle does not have significant change, takes all factors into consideration the anti-characteristic of scraping of brightness enhancement film according to the invention again, but the brightness enhancement film of knowledge capital invention all has higher advantage aspect optical appearance and the assembly technology.
Description of the invention provides for example with for the purpose of describing, and is not the disclosed form that exhaustively perhaps limit the invention to.A lot of modifications and variation are obvious for those of ordinary skill in the art.Selecting and describing embodiment is for better explanation principle of the present invention and practical application, thereby and makes those of ordinary skill in the art can understand the various embodiment that have various modifications that the present invention's design is suitable for special-purpose.
Claims (7)
1. one kind has and anti-scrapes the prism structure bright enhancement film of characteristic, it is characterized in that comprise base material and prism structure layer, said prism structure layer is positioned on the said base material; This prism structure layer is made up of several the first prism unit structure and second prism unit structures of arranging by same direction; The xsect of the said first prism unit structure is an isosceles triangle, and the said second prism unit structure has some discontinuous bulge-structures on the direction of extension of prism unit; The equal in length of each bulge-structure on said second prism unit; The interval of adjacent bulge-structure equates on each second prism unit; Spacing between at least two second adjacent prism unit is unequal.
According to claim 1 said have anti-scrape the prism structure bright enhancement film of characteristic, it is characterized in that the drift angle angle of the said first prism unit structure xsect is 60 °-120 °, highly be H1, H1 is between 10 μ m-100 μ m.
3. has an anti-prism structure bright enhancement film of characteristic of scraping according to claim 2 is said; It is characterized in that; The non-bossing xsect of described second prism unit is and the identical isosceles triangle of the said first prism unit xsect; Its bossing height is H2, and H2 is 1.05-1.5 a times of the said first prism cross-section height H 1.
4. has an anti-prism structure bright enhancement film of characteristic of scraping according to claim 3 is said; It is characterized in that; The non-bossing xsect of described second prism unit is and the identical isosceles triangle of the said first prism unit xsect; Lug boss office xsect is that drift angle is the isosceles triangle of fillet, and said drift angle radius of corner is between 0.5-2 μ m.
5. has an anti-prism structure bright enhancement film of characteristic of scraping according to claim 4 is said; It is characterized in that; The non-bossing xsect of described second prism unit is and the identical isosceles triangle of the said first prism unit xsect; Lug boss office xsect is an isosceles trapezoid, and the 0.03-0.2 that its upper base edge lengths is a bottom length doubly.
According to claim 1 said have anti-scrape the prism structure bright enhancement film of characteristic, it is characterized in that said base material is selected from a kind of in polyethylene terephthalate and the polymethylmethacrylate, the material of said prism structure layer is a UV-cured resin.
7. has an anti-prism structure bright enhancement film of characteristic of scraping according to claim 6 is said; It is characterized in that said UV-cured resin comprises a kind of in epoxy acrylic resin, aminoacrylic acid resin, polyvinyl resin, polyurethane acrylic resin, the polyester acrylic resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104336821A CN102455449A (en) | 2011-12-21 | 2011-12-21 | Prism-structured brightness enhancement film with anti-scraping property |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104336821A CN102455449A (en) | 2011-12-21 | 2011-12-21 | Prism-structured brightness enhancement film with anti-scraping property |
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| CN102455449A true CN102455449A (en) | 2012-05-16 |
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| CN2011104336821A Pending CN102455449A (en) | 2011-12-21 | 2011-12-21 | Prism-structured brightness enhancement film with anti-scraping property |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103048709A (en) * | 2012-12-28 | 2013-04-17 | 合肥乐凯科技产业有限公司 | Composite brightness enhancement and diffusion membrane |
| CN106547047A (en) * | 2017-01-24 | 2017-03-29 | 合肥京东方光电科技有限公司 | A kind of light guide plate, backlight module and display device |
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| WO1996027757A1 (en) * | 1995-03-03 | 1996-09-12 | Minnesota Mining And Manufacturing Company | Light directing film having variable height structured surface and light directing article constructed therefrom |
| TW200819855A (en) * | 2006-10-18 | 2008-05-01 | Gamma Optical Co Ltd | backlight module |
| CN100420965C (en) * | 2003-12-31 | 2008-09-24 | 3M创新有限公司 | Scratch-resistant light directing films |
| JP2009122440A (en) * | 2007-11-15 | 2009-06-04 | Idemitsu Unitech Co Ltd | Prism member and optical member |
| CN101630031A (en) * | 2007-11-16 | 2010-01-20 | 长兴化学工业股份有限公司 | Optical film |
| KR20110005458A (en) * | 2009-07-10 | 2011-01-18 | 주식회사 상보 | Optical sheet having multiple curvature |
| CN102236122A (en) * | 2010-04-30 | 2011-11-09 | 中强光电股份有限公司 | Optical membrane |
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2011
- 2011-12-21 CN CN2011104336821A patent/CN102455449A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996027757A1 (en) * | 1995-03-03 | 1996-09-12 | Minnesota Mining And Manufacturing Company | Light directing film having variable height structured surface and light directing article constructed therefrom |
| CN100420965C (en) * | 2003-12-31 | 2008-09-24 | 3M创新有限公司 | Scratch-resistant light directing films |
| TW200819855A (en) * | 2006-10-18 | 2008-05-01 | Gamma Optical Co Ltd | backlight module |
| JP2009122440A (en) * | 2007-11-15 | 2009-06-04 | Idemitsu Unitech Co Ltd | Prism member and optical member |
| CN101630031A (en) * | 2007-11-16 | 2010-01-20 | 长兴化学工业股份有限公司 | Optical film |
| KR20110005458A (en) * | 2009-07-10 | 2011-01-18 | 주식회사 상보 | Optical sheet having multiple curvature |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103048709A (en) * | 2012-12-28 | 2013-04-17 | 合肥乐凯科技产业有限公司 | Composite brightness enhancement and diffusion membrane |
| CN106547047A (en) * | 2017-01-24 | 2017-03-29 | 合肥京东方光电科技有限公司 | A kind of light guide plate, backlight module and display device |
| US10551545B2 (en) | 2017-01-24 | 2020-02-04 | Boe Technology Group Co., Ltd. | Light guide plate, backlight module and display apparatus |
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Application publication date: 20120516 |