CN102436021B - Prism-structure bright enhancement film with raised structures in non-uniform distribution - Google Patents
Prism-structure bright enhancement film with raised structures in non-uniform distribution Download PDFInfo
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- CN102436021B CN102436021B CN201110433676.6A CN201110433676A CN102436021B CN 102436021 B CN102436021 B CN 102436021B CN 201110433676 A CN201110433676 A CN 201110433676A CN 102436021 B CN102436021 B CN 102436021B
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- 238000009828 non-uniform distribution Methods 0.000 title 1
- 230000003287 optical effect Effects 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 22
- 238000010276 construction Methods 0.000 claims description 11
- 239000011347 resin Substances 0.000 claims description 10
- 229920005989 resin Polymers 0.000 claims description 10
- 239000004925 Acrylic resin Substances 0.000 claims description 6
- 229920000178 Acrylic resin Polymers 0.000 claims description 6
- 238000009826 distribution Methods 0.000 claims description 6
- 239000004973 liquid crystal related substance Substances 0.000 claims description 4
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 4
- 239000004593 Epoxy Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 230000000295 complement effect Effects 0.000 claims description 3
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000000758 substrate Substances 0.000 abstract 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- -1 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N Acrylic acid Chemical compound OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 230000003678 scratch resistant effect Effects 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
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- Optical Elements Other Than Lenses (AREA)
Abstract
本发明提供一种具有不均匀分布凸起结构的棱镜结构增光膜，包括基材和棱镜结构层。棱镜结构层设置于基材第一光学面上，棱镜结构层中棱镜单元结构分为两类，分别为第一棱镜单元结构和第二棱镜单元结构，第二棱镜单元结构在棱镜单元结构的伸展方向上具有若干不连续的凸起结构，该凸起结构在伸展方向上的长度不全相同，在棱镜伸展方向上的间隔不全相同，在棱镜单元结构排列方向上的间隔也不全相同。该棱镜结构增光膜用以汇聚从光源发出的光线，以调整从光源所发出光线穿过该增光膜后的发散角度，并提高发光模组生产良率。
The invention provides a prism-structure light-enhancing film with unevenly distributed protrusion structures, which includes a base material and a prism-structure layer. The prism structure layer is arranged on the first optical surface of the substrate. The prism unit structure in the prism structure layer is divided into two types, which are respectively the first prism unit structure and the second prism unit structure. There are several discontinuous raised structures in the direction, the lengths of the raised structures in the stretching direction are not all the same, the intervals in the stretching direction of the prisms are not all the same, and the intervals in the arrangement direction of the prism unit structures are also not all the same. The prism-structured enhancement film is used to gather the light emitted from the light source, so as to adjust the divergence angle of the light emitted from the light source after passing through the enhancement film, and improve the production yield of the light-emitting module.
Description
Technical field
The invention discloses a kind of bright enhancement film, particularly about a kind of bright enhancement film with uneven distribution bulge-structure that is applied to liquid crystal display (liquid crystal display, LCD).
Background technology
At present, bright enhancement film (BEF, Brightness Enhancement Film) be widely used in illuminating module and increase display brightness and the energy of saving display battery apparatus to be used for converging normal application bright enhancement film (BEF) in the display devices such as the light that light source is sent, especially monitor.The principle of bright enhancement film is by within reflecting and reflecting the light outside directive observer visual angle is adjusted to observer visual angle, has so just improved the utilization factor of luminous energy that light source sends.
Tradition bright enhancement film (BEF) is formed in order to converge the prism bar of light by many, and these prism bar are arranged according to a direction, form a prism array, as shown in Figure 1.Conventional prism structure bright enhancement film, because meeting and other bloomings are used in conjunction with, easily causes scratch to the sharp corners of prism structure, thereby affects optical quality in actual applications.In order to address this problem, US Patent No. 7142767 discloses a kind of brightness enhancement film with anti-scratch function, its structure for increasing the prism columns that some tops are fillet or platform in traditional brightness enhancement film prism array, these prism heights are higher than the ordinary construction prism columns of its periphery, thereby can play anti-scratch effect of rubbing.Yet this kind of structure, because wedge angle is cancelled at whole prism columns top, changes fillet or platform structure into, can cause the decline of optical gain values.Therefore, in order to address the above problem, must improve existing bright enhancement film of prism structure.
Summary of the invention
The object of the invention is to provide a kind of bright enhancement film of prism structure with uneven distribution bulge-structure in order to converge the light sending from light source, to adjust the dispersion angle from light source emitted light passes this bright enhancement film, and improves illuminating module and produces yield.
Concrete technical scheme is:
A kind of bright enhancement film of prism structure with uneven distribution bulge-structure, comprise base material and prism structure layer, described prism structure layer is positioned on described base material, this prism structure layer is lined up array by several prism unit structures by same direction, described prism unit structure comprises the first prism unit structure and the second prism unit structure, the second prism unit structure has some discontinuous bulge-structures in the direction of extension of prism unit structure, the length L 1 of this bulge-structure in the direction of extension of prism unit structure is not identical or incomplete same, be positioned in same prism unit structure, the interval L2 of any two the adjacent bulge-structures in prism unit construction stretch direction is not identical or incomplete same, interval L3 in prism arrangement direction is not identical or incomplete same yet.
Wherein, the bulge-structure of described the second prism unit structure in the length L 1 of prism unit construction stretch direction between 50 μ m～500mm.
Wherein, be positioned at same prism unit structural, the interval L2 of any two adjacent described bulge-structures in prism unit construction stretch direction is between 100 μ m～500mm.
Wherein, described the second prism unit, in prism unit structural arrangement direction, arranges a second prism unit structure every 1～50 the first prism unit structure.
Wherein, the xsect of the first described prism unit structure is isosceles triangle, and drift angle angle is 60 °～120 °, is highly H1, and H1 is between 10 μ m～100 μ m.
Wherein, the second described prism unit structure is the isosceles triangle identical with described the first prism unit structure xsect at non-bossing xsect, and its bulge-structure height is H2, and H2 is 1.05～1.5 times of described the first prism cross-section height H 1.
Wherein, the second described prism unit bulge-structure xsect is that drift angle is the isosceles triangle of fillet, and described drift angle radius of corner is between 0.5～2 μ m.
Wherein, the second described prism unit bulge-structure xsect is isosceles trapezoid, and its upper base edge lengths is 0.03～0.2 times of bottom length.
Wherein, described base material has the first relative optical surface and the second optical surface, described prism structure layer be positioned on the first optical surface and bottom surface relative with the second optical surface.
Wherein, described base material is selected from a kind of in polyethylene terephthalate (PET) and polymethylmethacrylate (PMMA), the material of described prism structure layer is UV-cured resin, is selected from a kind of in epoxy acrylic resin, amino acrylic resin, polyvinyl resin, polyurethane acrylic resin, polyester acrylic resin.
The liquid crystal display that comprises described bright enhancement film of prism structure.
Beneficial effect of the present invention is, because the bulge-structure of the second prism unit structure has fillet or platform, the scratch to sharp corners in the time of can avoiding in actual applications diaphragm assembling, plays anti-scratch function.In addition, because bulge-structure only accounts for the part ratio of the second prism unit structure, remainder is still sharp-pointed angular structures, and with respect to prior art, the present invention has higher optical gain performance.
Accompanying drawing explanation
Fig. 1 is the perspective view of conventional prism structure bright enhancement film.
Fig. 2 is bright enhancement film of prism structure perspective view in the embodiment of the present invention 1.Wherein, the 100th, anti-scratch structure bright enhancement film, the 102nd, base material, the 108th, prism structure layer, 106 is first optical surfaces, 104 is second optical surfaces, 110B is the direction of extension of prism unit structure, 110A is the orientation of prism unit structure, and 112A is the first prism unit structure, and 112B is the second prism unit structure.
Fig. 3 A is bright enhancement film of prism structure front view in the embodiment of the present invention 1.Wherein, 112A is the first prism unit structure, 112B is the second prism unit structure, H1 is the height of the first prism unit structure, H2 is the height of the bulge-structure of the second prism unit structure, and R is the radius of the bulge-structure xsect of the second prism unit structure fillet drift angle that is isosceles right triangle.
Fig. 3 B is bright enhancement film of prism structure vertical view in the embodiment of the present invention 1.Wherein, L1 is the length of the second prism unit construction stretch direction projection structure, and L2 is the interval of two adjacent bulge-structures in the second prism unit structure prism direction of extension.L3 is the interval of prism arrangement direction projection structure.
Fig. 4 is the embodiment of the present invention 1 prism structure brightness enhancement film and common prism structure brightness enhancement film optical gain and angle of visibility comparison diagram.
Fig. 5 is bright enhancement film of prism structure perspective view in the embodiment of the present invention 2.Wherein, the 100th, anti-scratch structure bright enhancement film, the 102nd, base material, the 108th, 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 bright enhancement film of prism structure front view in the embodiment of the present invention 2.Wherein, H1 is the height of the first prism unit structure, and H3 is the height of the bulge-structure of the second prism unit structure, and d is the upper base length that the bulge-structure xsect of the second prism unit structure is isosceles trapezoid.
Fig. 7 is bright enhancement film of prism structure vertical view in the embodiment of the present invention 2.Wherein, L1 is the length in prism unit construction stretch direction of the second prism unit structure projection structure, L2 is the intervals of two adjacent bulge-structures of the second prism unit structure in prism unit construction stretch direction, and L3 is the interval of bulge-structure in prism unit structural arrangement direction.
Fig. 8 is the embodiment of the present invention 2 prism structure brightness enhancement film and common prism structure brightness enhancement film optical gain and angle of visibility comparison diagram.
Embodiment
Embodiment 1
Referring to Fig. 2, Fig. 3 A, Fig. 3 B, Fig. 4.Described base material 102 materials are polyethylene terephthalates, and the material of described prism structure layer 108 is the polyurethane acroleic acid fat of uV curable.
The preparation method of this brightness enhancement film is: coating ultraviolet light resin bed on base material 102 first optical surfaces 106, by the mold wheel having with the microstructure complementary structure of prism structure layer 108, UV-cured resin is carried out to press mold, make it to form required microstructure, use again subsequently UV-irradiation, the UV-cured resin layer that forms microstructure is solidified, thereby prism structure layer 108 is arranged on the first optical surface 106 of base material 102.
Fig. 3 A shows that in prism structure layer 108, first its xsect of prism unit structure 112A is isosceles right triangle, and height H 1 is 25 μ m.In the direction of extension of the second prism unit structure 112B, there are some bulge-structures, the second prism unit structure 112B xsect is the isosceles right triangle identical with the first prism unit structure 112A xsect at non-bossing, be highly also H1, bulge-structure height H 2 is 27 μ m, bulge-structure place xsect is that drift angle is the isosceles right triangle of fillet, and radius of corner R is 1 μ m.
Fig. 3 B is the vertical view of prism structure layer, and it shows that the second prism unit structure 112B relief structure has not exclusively equal length L 1 in prism unit construction stretch direction, and L1 is between 50 μ m～500mm; In prism unit construction stretch direction, any two adjacent bulge-structures have not exclusively equal interval L2, and L2 is between 100 μ m～500mm; In prism unit structural arrangement direction, every 1～50 the first prism unit structure 112A, a second prism unit structure 112B is set.At the L3 that is spaced apart of prism unit structural arrangement direction projection structure, L3 does not equate entirely.
Some bulge-structures in the second prism structure 112B can effectively prevent the injury of scratching the sharp-pointed drift angle of the first prism structure is caused because of friction with other diaphragms in illuminating module production run, thereby ensure the production yield of illuminating module; In addition, still comprise the non-dry bulge-structure of part in the second prism unit structure 112B, this part is the sharp-pointed structure identical with the first prism unit structure 112A, can avoid the reduction of optical gain.
Fig. 4 shows the optical gain performance of the brightness enhancement film in embodiment 1.Wherein the metering system of briliancy distribution curve is: using the planar light source of a uniformly light-emitting as measurement light source, test diaphragm is covered on light source, application brightness photometer perpendicular alignmnet diaphragm central authorities, now defining test angle is 0 °, then take diaphragm central authorities as the center of circle, brightness photometer is distributed in to several angles of horizontal and vertical direction rotation, records a series of data and form briliancy scatter chart.It is defined as horizontal direction along prism unit direction of extension, along prism arrangement direction, is defined as vertical direction; During without diaphragm, luminance gain is defined as 1.
As shown in Figure 4, the present invention's brightness enhancement film luminance gain there is no obvious decline compared with traditional structure (BEF), and visible angle is without significant change, consider the scratch-resistant characteristic of brightness enhancement film of the present invention, known the present invention's brightness enhancement film all has higher advantage aspect optical appearance and assembly technology again.
Embodiment 2
Referring to Fig. 5, Fig. 6, Fig. 7.In embodiment 2, the xsect of the first prism unit structure 112A is isosceles right triangle, and height H 1 is 25 μ m.The second prism unit structure bulge-structure xsect is that base angle is the isosceles trapezoid of 45 degree, and trapezoidal height H 3 is 28 μ m, and upper base length d is 2 μ m, as shown in Figure 6.The material of base material 102 is polymethylmethacrylates.
The preparation method of described brightness enhancement film is: the epoxy acrylic resin of coating ultraviolet light curing on base material 102 first optical surfaces 106, by the mold wheel having with the microstructure complementary structure of prism structure layer 108, UV-cured resin is carried out to press mold, can make UV-cured resin layer form required microstructure, use again subsequently UV-irradiation, the UV-cured resin layer that forms microstructure is solidified, thereby prism structure layer 108 is arranged on the first optical surface 106 of base material 102, the cross sectional shape of the bulge-structure of its second prism structure unit is isosceles trapezoid.Bulge-structure has not exclusively equal length L 1 in the direction of extension of prism unit structure, and L1 is between 50 μ m～500mm; In prism unit construction stretch direction, any two adjacent bulge-structures have not exclusively equal interval L2, and L2 is between 100 μ m～500mm; In prism unit structural arrangement direction, every 1～50 the first prism unit structure 112A, a second prism unit structure 112B is set, at the L3 that is spaced apart of prism unit structural arrangement direction projection structure, L3 does not equate entirely.
Fig. 8 shows the optical gain performance of the brightness enhancement film in embodiment 2.
Although the present invention sets forth as above with preferred embodiment; so it is not in order to limit the present invention; persond having ordinary knowledge in the technical field of the present invention; without departing from the spirit and scope of the invention; can do various changes and modification, thus protection scope of the present invention when depending on after the attached claim scope person of defining be as the criterion.
Claims (2)
1. a bright enhancement film of prism structure with uneven distribution bulge-structure, comprises base material and prism structure layer, and the xsect of the first prism unit structure (112A) is isosceles right triangle, and height H 1 is 25 μ m; The second prism unit structure bulge-structure xsect is that base angle is the isosceles trapezoid of 45 degree, and trapezoidal height H 3 is 28 μ m, and upper base length d is 2 μ m, and the material of base material (102) is polymethylmethacrylate;
The preparation method of described bright enhancement film is: the epoxy acrylic resin of the upper coating ultraviolet light curing of base material (102) first optical surfaces (106), by the mold wheel having with the microstructure complementary structure of prism structure layer (108), UV-cured resin is carried out to press mold, can make UV-cured resin layer form required microstructure, use again subsequently UV-irradiation, 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 bulge-structure of its second prism unit structure is isosceles trapezoid, bulge-structure has not exclusively equal length L 1 in the direction of extension of the first prism unit structure, and L1 is between 50 μ m～500mm, in the first prism unit construction stretch direction, any two adjacent bulge-structures have not exclusively equal interval L2, and L2 is between 100 μ m～500mm, in the first prism unit structural arrangement direction, every 1～50 the first prism unit structure (112A), a second prism unit structure (112B) is set, at the L3 that is spaced apart of the first prism unit structural arrangement direction projection structure, L3 does not equate entirely.
2. the liquid crystal display that comprises bright enhancement film of prism structure claimed in claim 1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110433676.6A CN102436021B (en) | 2011-12-21 | 2011-12-21 | Prism-structure bright enhancement film with raised structures in non-uniform distribution |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110433676.6A CN102436021B (en) | 2011-12-21 | 2011-12-21 | Prism-structure bright enhancement film with raised structures in non-uniform distribution |
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| CN102436021A CN102436021A (en) | 2012-05-02 |
| CN102436021B true CN102436021B (en) | 2014-10-22 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018802B (en) * | 2012-11-30 | 2015-09-16 | 张家港康得新光电材料有限公司 | A kind of brightness enhancement film with anti-scratch function |
| CN106483713A (en) * | 2016-12-27 | 2017-03-08 | 惠科股份有限公司 | Backlight module |
| CN106526970B (en) * | 2016-12-27 | 2020-05-08 | 惠科股份有限公司 | Liquid crystal display device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2007097454A1 (en) * | 2006-02-27 | 2007-08-30 | Zeon Corporation | Film having fine uneven shape and method for manufacturing same |
| CN101216639A (en) * | 2008-01-18 | 2008-07-09 | 长兴光学材料（苏州）有限公司 | Integration-type optical film |
| JP2009122440A (en) * | 2007-11-15 | 2009-06-04 | Idemitsu Unitech Co Ltd | Prism member and optical member |
| JP2010122628A (en) * | 2008-11-21 | 2010-06-03 | Toppan Printing Co Ltd | Optical sheet, back light unit and display device |
| CN101918867A (en) * | 2008-03-03 | 2010-12-15 | Lg化学株式会社 | Optical film and its preparation method |
| KR20110076320A (en) * | 2009-12-29 | 2011-07-06 | 웅진케미칼 주식회사 | Prism film having a composite function and a manufacturing method thereof |
| CN102236122A (en) * | 2010-04-30 | 2011-11-09 | 中强光电股份有限公司 | Optical film |
-
2011
- 2011-12-21 CN CN201110433676.6A patent/CN102436021B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007097454A1 (en) * | 2006-02-27 | 2007-08-30 | Zeon Corporation | Film having fine uneven shape and method for manufacturing same |
| JP2009122440A (en) * | 2007-11-15 | 2009-06-04 | Idemitsu Unitech Co Ltd | Prism member and optical member |
| CN101216639A (en) * | 2008-01-18 | 2008-07-09 | 长兴光学材料（苏州）有限公司 | Integration-type optical film |
| CN101918867A (en) * | 2008-03-03 | 2010-12-15 | Lg化学株式会社 | Optical film and its preparation method |
| JP2010122628A (en) * | 2008-11-21 | 2010-06-03 | Toppan Printing Co Ltd | Optical sheet, back light unit and display device |
| KR20110076320A (en) * | 2009-12-29 | 2011-07-06 | 웅진케미칼 주식회사 | Prism film having a composite function and a manufacturing method thereof |
| CN102236122A (en) * | 2010-04-30 | 2011-11-09 | 中强光电股份有限公司 | Optical film |
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