CN102023329A - Brightness enhancement film - Google Patents
Brightness enhancement film Download PDFInfo
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- CN102023329A CN102023329A CN2009101904229A CN200910190422A CN102023329A CN 102023329 A CN102023329 A CN 102023329A CN 2009101904229 A CN2009101904229 A CN 2009101904229A CN 200910190422 A CN200910190422 A CN 200910190422A CN 102023329 A CN102023329 A CN 102023329A
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- prism post
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- brightening piece
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- exiting surface
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Abstract
The invention provides a brightness enhancement film. The brightness enhancement film comprises a light entering surface and a light emergent surface, wherein the light emergent surface is provided with prism column rings which are arranged in arrays. The brightness enhancement film provided by the invention fulfills the aim of improving light utilization rate by changing the shapes and the arrangement of prisms on the light emergent surface aiming at the problem that loss is caused because part light cannot be utilized effectively in the conventional brightness enhancement film. In the brightness enhancement film, the light utilization rate can be effectively improved so as to improve the intensity of emergent light of a backlight module within a specific angular region; therefore, a better display effect can be observed by an observer.
Description
Technical field
The invention belongs to field of liquid crystals, relate in particular to the brightening piece that the backlight liquid crystal display module is applied to.
Background technology
LCDs is widely used in the electronic products such as personal digital assistant, notebook computer, digital camera, mobile phone, LCD TV, because LCDs itself is not luminous, could produce Presentation Function by module backlight.
Module backlight generally by light emitting source, light guide plate, down diffuser plate, down brightening piece, go up brightening piece, go up diffuser plate and shading black and white glue etc. and form, see also Fig. 1, the structural profile synoptic diagram of module backlight of the prior art, this backlight module 10 comprises reflecting plate 11, light guide plate 12, comprise back light 13 in the side of light guide plate 12, above light guide plate 12, comprise successively down diffuser plate 141 ', down brightening piece 151 ', go up brightening piece 152 ' and go up diffuser plate 142 '.Wherein, generally contain the methyl methacrylate particulate in the diffuser plate 14, this methyl methacrylate particulate is used to make light to spread as expanding radion, and brightening piece has " V " shape micro-prism structure, is used to improve the brightness in the module certain viewing angles scope backlight.During use, after the light that is produced by sidelight light source 13 enters down diffuser plate 141 ' and is evenly spread by light guide plate 12, it continues to enter down brightening piece 151 ', goes up brightening piece 152 ', by the emergent light generation congregation to a certain extent of brightening piece ejaculation, thereby improve the brightness of module backlight in the certain viewing angles scope.
See also Fig. 2, be the structural representation of brightening piece of the prior art, leg-of-mutton prism columns 153 ' and base material 154 ' institute that brightening piece 15 ' is arranged by several parallel longitudinals form.Prism columns 153 ' is incorporated into a side of base material 154 ', and height, the width of each prism columns 153 ' are identical, and the ridge height of prism columns 153 ' is constant, move towards into the inclined-plane of straight line crest line both sides symmetrical.
Seeing also Fig. 3 and Fig. 4, is the light distribution synoptic diagram of brightening piece of the prior art and the index path of brightening piece, and the light in the brightening piece can be divided into four zones:
The a zone: can see through brightening piece, and direction lifting to some extent, reached light enhancing effect;
B zone: can produce total reflection, so light can not see through brightening piece, and be refracted recycling;
The c zone: light is refracted to light guide plate through adjacent prism structure and is repeated to utilize, and integral body reaches the purpose of adding lustre to;
The d zone: the light of wide-angle, direction of light can not be lifted, so this part light has been depleted basically;
By Fig. 3 and Fig. 4 as can be seen, light 31 and light 32 can rationally be utilized by brightening piece 15 ', make the brightening piece of this known structure certain effect of converging be arranged to light, effectively controlled the consumption of light, but high angle scattered light 33 can't be used effectively, and the ratio that it has accounted for incident light light intensity about 5% has caused light utilization efficiency decline to a certain extent thus.
Summary of the invention
Brightening piece provides a kind of new brightening piece to the not high enough technical matters of the utilization factor of high angle scattered light in the prior art in order to solve in the present invention.
Technical scheme of the present invention is: a kind of brightening piece, comprise base material, and described base material comprises an incidence surface and an exiting surface, wherein, described exiting surface is provided with the prism post annulus that is arrayed.
Further, single described prism post annulus comprises at least two prism posts that are arranged concentric, single described prism post has first side, second side and crest line, identical distance is extended to exiting surface by the both sides of this crest line respectively in described first side, second side, and the vertical range of the described exiting surface of the crest line of each independent prism post distance is outwards increased progressively by the center of described prism post annulus successively.
Brightening piece provided by the invention, thus there is a part of light to be used effectively to cause the problem of loss at existing brightening piece, and then, reach the purpose that improves light utilization efficiency by changing in the shape of the prism on brightening piece surface and arranging.In the present invention, by the method for the prism post annulus that is arrayed is set on the exiting surface of described brightening piece, and in this single prism post annulus, be outside equipped with at least two arranged concentric and prism post that it increases progressively highly successively by mind-set wherein, because it can effectively reclaim wide-angle light, thereby it can effectively improve the utilization factor of light, and then improves module backlight outgoing light intensity in the special angle scope, makes the observer can watch better display effect.
Concrete feature of the present invention and advantage will be elaborated by embodiment and Figure of description.
Description of drawings
Fig. 1 is the structural profile synoptic diagram of module backlight of the prior art;
Fig. 2 is the structural representation of brightening piece of the prior art;
Fig. 3 is the light distribution synoptic diagram of brightening piece of the prior art;
Fig. 4 is the index path of brightening piece of the prior art;
Fig. 5 is the perspective view of a kind of embodiment of brightening piece provided by the invention;
Fig. 6 is the planar structure synoptic diagram of a kind of embodiment of brightening piece provided by the invention;
Fig. 7 is the prism post circular ring structure synoptic diagram of a kind of embodiment of brightening piece provided by the invention;
Fig. 8 is prism post annulus cross-sectional view and the index path of a kind of embodiment of brightening piece provided by the invention;
Fig. 9 is brightness value (the NIT)-visual angle angle value contrast synoptic diagram of the brightening piece of a kind of embodiment of brightening piece provided by the invention and prior art;
Figure 10 is the cross-sectional view of a kind of embodiment of brightening piece provided by the invention.
Embodiment
In order to make technical matters solved by the invention, technical scheme and beneficial effect clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
With reference to Fig. 5 and Fig. 6, be perspective view and the planar structure synoptic diagram of a kind of embodiment of brightening piece provided by the invention.Brightening piece 15 provided by the invention, thereby exist a part of wide-angle light to be used effectively at existing brightening piece 15 ' and cause the problem of loss, be intended to shape, improve the purpose that light utilization efficiency reduces the loss of light thereby reach by the prism that changes brightening piece 15 surfaces.
Continuation is with reference to Fig. 5 to Fig. 8, and brightening piece 15 provided by the invention comprises base material 152, and described base material 152 comprises an incidence surface 159 and an exiting surface 158, and wherein, described exiting surface 158 is provided with the prism post annulus 151 that is arrayed.In the present invention, described brightening piece 15 selected materials must have higher photopermeability.Described incidence surface 159 has been arranged a plurality of prism post annulus 151 that are arrayed in order to receive the uniform light that is shot out by diffuser plate 14 on described exiting surface 158.
Further, with reference to Fig. 7, be prism post annulus 151 structural representations of 15 1 kinds of embodiment of brightening piece provided by the invention.Single described prism post annulus 151 comprises at least two prism posts that are arranged concentric, single described prism post has first side 100, second side 101 and crest line 102, identical distance is extended to exiting surface 158 by the both sides of this crest line 102 respectively in described first side 100, second side 101, and the vertical range of the described exiting surface 158 of crest line 102 distances of each independent prism post is outwards increased progressively by the center of described prism post annulus 151 successively.As shown in Figure 7, each prism post annulus 151 all has its unique center, and be provided with the prism post of a plurality of concentric circles around this center, and more near this central circular prism post, vertical range between its crest line 102 and the exiting surface 158 is more little, outside by described center, the crest line 102 of the prototype prism post that it is corresponding and the vertical range between the exiting surface 158 increase progressively successively.
Further, with reference to Fig. 8, be prism post annulus 151 cross-sectional view and the index path of 15 1 kinds of embodiment of brightening piece provided by the invention.Described first side 100 and second side 101 form corner angle 103, and the angular range of described corner angle is 80 °～100 °.Under the preferable case, the angle of described corner angle 103 is 90 °.
As known from the above, brightening piece 15 provided by the invention, its single prism post annulus 151 comprises at least two prism posts that are arranged concentric, when described prism post annulus 151 comprises two prism posts that are arranged concentric, its can be by a relatively large margin the secondary recovery of emergent light of 15 pairs of wide-angles of raising brightening piece, thereby improve the utilization factor of light to a certain extent; When described prism post annulus 151 comprises above three prism posts, can or reduce the height and the width of the prism post at close center by suitable increase, so that under the prerequisite of light utilization efficiency that guarantees brightening piece 15 and thickness requirement, be implemented in this single prism post annulus 151 cloth and deposit these and a plurality ofly be the prism post that concentric circles is arranged, thereby finally realize improving the utilization factor of light and the purpose that promotes the display device display effect.According to a kind of preferred embodiment of brightening piece 15 provided by the invention, described prism post annulus 151 comprises the first prism post 1511, the second prism post 1512 and the 3rd prism post 1513 from the inside to the outside successively.
Wherein, the crest line of the described second prism post 1512 apart from the vertical range H2 of described exiting surface 158 be the crest line of the first prism post 1511 apart from 1.2～2 times of the vertical range H1 of described exiting surface 158, the crest line of described the 3rd prism post 1513 is that the crest line of the second prism post 1512 is apart from 1.2～2 times of the vertical range H2 of described exiting surface 158 apart from the vertical range H3 of described exiting surface 158.Under the preferable case, the crest line of the described second prism post 1512 apart from the vertical range H2 of described exiting surface 158 be the crest line of the first prism post 1511 apart from 1.5 times of the vertical range H1 of described exiting surface 158, the crest line of described the 3rd prism post 1513 is that the crest line of the second prism post 1512 is apart from 1.5 times of the vertical range H2 of described exiting surface 158 apart from the vertical range H3 of described exiting surface 158.For example, in the application process of reality, the crest line of the described first prism post 1511 is 8um～20um apart from the vertical range H1 of described exiting surface 158, the crest line of the described second prism post 1512 is 9.6um～40um apart from the vertical range H2 of described exiting surface 158, and the crest line of described the 3rd prism post 1513 is 11.52um～80um apart from the vertical range H3 of described exiting surface 158.
Same, because the section of this prism post is preferably isosceles right triangle, thus, the width W 2 of the described second prism post 1512 is 1.2～2 times of the first prism post, 1511 width W 1, and the width W 3 of described the 3rd prism post 1513 is 1.2～2 times of the second prism post, 1512 width W 2.Under the preferable case, the width W 2 of the described second prism post 1512 is 1.5 times of the first prism post, 1511 width W 1, and the width W 3 of described the 3rd prism post 1513 is 1.5 times of the second prism post, 1512 width W 2.For example, among the application process of reality, the width W 1 of the described first prism post 1511 is 16um～40um, and the described second prism post, 1512 width W 2 are 19.2um～80um, and the width W 3 of described the 3rd prism post 1513 is 23.04um～160um.
Please continue with reference to Fig. 8, and contrast Fig. 4, the high angle scattered light 406 that penetrates from the first prism post 1511 is not all slatterned, the back produces refraction in the second prism post 1512 that is adjacent but some directly is injected into, and inject this brightening piece 15 once more behind the process reflecting plate, and, according to this brightening piece 15 provided by the invention, if the wide-angle light 406 that penetrates from the described first prism post 1511 can't be injected in the second prism post 1512 so that it produces refraction, described wide-angle light 406 can also partly be injected in described the 3rd prism post 1513, and light can be utilized after its refraction equally once more.Equally, the wide-angle light 406 that shoots out from the second prism post 1512 can consequently be utilized by adjacent prism post bounce back reflector equally again, and the like, part high angle scattered light before making in the d zone shown in Fig. 3 can be recycled, thereby has improved utilization of incident light.
Please refer to Fig. 9, is brightness value (the NIT)-visual angle angle value contrast synoptic diagram of the brightening piece 15 ' of 15 1 kinds of embodiment of brightening piece provided by the invention and prior art, and described NIT (nit) is the unit of brightness, 1nit=1 candela/square metre [cd/m
2].Wherein curve 4O7 is the brightness value-visual angle angle value distribution curve of known brightening piece 15 ', curve 408 is the brightness value-visual angle angle value distribution curve of the brightening piece 15 of an embodiment provided by the invention, by curve 407 and 408 more as can be known, the brightening piece that provides 15 brightening pieces 15 ' more of the prior art of the present invention have higher brightness value in ± 40 ° angular field of view, therefore brightening piece 15 more existing brightening pieces 15 ' provided by the invention have higher gain of light value.Thereby effectively improved the utilization factor of light to a certain extent, and then made the observer can watch better display effect.In addition, to realize the technology of optically focused, 15 needs of brightening piece provided by the invention provide one deck, just can realize good spotlight effect, therefore, have reduced cost to a certain extent with respect to the two-layer brightening piece 15 ' of available technology adopting.
According to this brightening piece 15 provided by the invention, because in concrete application process, described prism post annulus 151 structures need be cut, when it is cut, owing to kept the shape and structure of prism post at cut surface, it still can reach the effect of optically focused, and therefore, the spotlight effect of this brightening piece 15 provided by the invention can not be affected because of the cutting in the production run.
And, in concrete implementation process, with reference to Figure 10, for preventing that the optical texture face to brightening piece 15 of the present invention causes damage in the process of making, carrying or using, the general center prism post farthest of the described prism post annulus 151 of distance that makes has curved profile 1020, and in concrete implementation process, the radius-of-curvature r of its curved profile 1020 is less than or equal to 8um, under the preferable case, the radius-of-curvature r of described curved profile 1020 equals 6um.
In the present invention, the technician is understood that, the material selection of described base material 152 can make the concrete structure of described prism post annulus 151 change, and the ratio to the distance between the described exiting surface 158 of for example described first prism post 1511, the second prism post 1512 and the 3rd prism post 1513 changes.In concrete application process, described base material 152 can be selected acryl resin, polycarbonate, acrylate, polyester, polypropylene, polystyrene, Polyvinylchloride or the like.And, also be the material of as far as possible selecting for use refractive index bigger for the regulation of the refractive index of described base material 152, for example, among the embodiment that provides in the present invention, described base material 152 preferentially select for use into refractive index greater than 1.5 material.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a brightening piece comprises base material, and described base material comprises an incidence surface and an exiting surface, it is characterized in that, described exiting surface is provided with the prism post annulus that is arrayed.
2. brightening piece as claimed in claim 1, it is characterized in that, single described prism post annulus comprises at least two prism posts that are arranged concentric, single described prism post has first side, second side and crest line, identical distance is extended to exiting surface by the both sides of this crest line respectively in described first side, second side, and the vertical range of the described exiting surface of the crest line of each independent prism post distance is outwards increased progressively by the center of described prism post annulus successively.
3. brightening piece as claimed in claim 2 is characterized in that, described first side and second side form corner angle, and the angular range of described corner angle is 80 °～100 °.
4. brightening piece as claimed in claim 3 is characterized in that, the angle of described corner angle is 90 °.
5. brightening piece as claimed in claim 4 is characterized in that, described prism post annulus comprises the first prism post, the second prism post and the 3rd prism post from the inside to the outside successively.
6. brightening piece as claimed in claim 5, it is characterized in that, the crest line of the described second prism post is the first prism post apart from 1.2～2 times of the vertical range of described exiting surface apart from the vertical range of described exiting surface, and the crest line of described the 3rd prism post is that the crest line of the second prism post is apart from 1.2～2 times of the vertical range of described exiting surface apart from the vertical range of described exiting surface.
7. brightening piece as claimed in claim 6, it is characterized in that, the crest line of the described second prism post apart from the vertical range of described exiting surface be the crest line of the first prism post apart from 1.5 times of the vertical range of described exiting surface, the crest line of described the 3rd prism post is that the crest line of the second prism post is apart from 1.5 times of the vertical range of described exiting surface apart from the vertical range of described exiting surface.
8. brightening piece as claimed in claim 5 is characterized in that, the width of the described second prism post is 1.2～2 times of the first prism post width, and the width of described the 3rd prism post is 1.2～2 times of the second prism post width.
9. brightening piece as claimed in claim 8 is characterized in that, the width of the described second prism post is 1.5 times of the first prism post width, and the width of described the 3rd prism post is 1.5 times of the second prism post width.
10. brightening piece as claimed in claim 2 is characterized in that, the center prism post farthest of the described prism post annulus of distance, and intersect and the formation curved profile its first side and second side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101904229A CN102023329A (en) | 2009-09-14 | 2009-09-14 | Brightness enhancement film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101904229A CN102023329A (en) | 2009-09-14 | 2009-09-14 | Brightness enhancement film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102023329A true CN102023329A (en) | 2011-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101904229A Pending CN102023329A (en) | 2009-09-14 | 2009-09-14 | Brightness enhancement film |
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| CN (1) | CN102023329A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103728680A (en) * | 2014-01-10 | 2014-04-16 | 宁波激智科技股份有限公司 | Multifunctional optical brightness enhancement film |
| CN105629378A (en) * | 2016-01-04 | 2016-06-01 | 京东方科技集团股份有限公司 | Optical waveguide, method for making the same, display substrate and display device |
| CN106773237A (en) * | 2015-11-19 | 2017-05-31 | 宁波长阳科技股份有限公司 | A kind of brightness enhancement film |
| EP3084487A4 (en) * | 2013-12-19 | 2017-08-16 | Bright View Technologies Corporation | 2d deglaring diffusers increasing axial luminous intensity |
| CN112882144A (en) * | 2021-01-21 | 2021-06-01 | 北京理工大学 | Ultraviolet filtering structure based on nanoring patterned interface and design method thereof |
-
2009
- 2009-09-14 CN CN2009101904229A patent/CN102023329A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3084487A4 (en) * | 2013-12-19 | 2017-08-16 | Bright View Technologies Corporation | 2d deglaring diffusers increasing axial luminous intensity |
| US10317583B2 (en) | 2013-12-19 | 2019-06-11 | Bright View Technologies Corporation | 2D deglaring diffusers increasing axial luminous intensity |
| CN103728680A (en) * | 2014-01-10 | 2014-04-16 | 宁波激智科技股份有限公司 | Multifunctional optical brightness enhancement film |
| CN103728680B (en) * | 2014-01-10 | 2017-01-18 | 宁波激智科技股份有限公司 | Multifunctional optical brightness enhancement film |
| CN106773237B (en) * | 2015-11-19 | 2020-02-28 | 宁波长阳科技股份有限公司 | Brightness enhancement film |
| CN106773237A (en) * | 2015-11-19 | 2017-05-31 | 宁波长阳科技股份有限公司 | A kind of brightness enhancement film |
| WO2017117906A1 (en) * | 2016-01-04 | 2017-07-13 | 京东方科技集团股份有限公司 | Optical waveguide, method for manufacturing optical waveguide, display substrate and display device |
| CN105629378B (en) * | 2016-01-04 | 2018-03-16 | 京东方科技集团股份有限公司 | Display base plate and display device |
| US10553826B2 (en) | 2016-01-04 | 2020-02-04 | Boe Technology Group Co., Ltd. | Optical waveguide and manufacturing method thereof, display substrate and display device |
| CN105629378A (en) * | 2016-01-04 | 2016-06-01 | 京东方科技集团股份有限公司 | Optical waveguide, method for making the same, display substrate and display device |
| US11217775B2 (en) | 2016-01-04 | 2022-01-04 | Boe Technology Group Co., Ltd. | Optical waveguide and manufacturing method thereof, display substrate and display device |
| CN112882144A (en) * | 2021-01-21 | 2021-06-01 | 北京理工大学 | Ultraviolet filtering structure based on nanoring patterned interface and design method thereof |
| CN112882144B (en) * | 2021-01-21 | 2021-11-30 | 北京理工大学 | Ultraviolet filtering structure based on nanoring patterned interface and design method thereof |
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Application publication date: 20110420 |