CN1924620A - Trapezoid lens high brightness diffusion plate - Google Patents
Trapezoid lens high brightness diffusion plate Download PDFInfo
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- CN1924620A CN1924620A CN 200610141031 CN200610141031A CN1924620A CN 1924620 A CN1924620 A CN 1924620A CN 200610141031 CN200610141031 CN 200610141031 CN 200610141031 A CN200610141031 A CN 200610141031A CN 1924620 A CN1924620 A CN 1924620A
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Abstract
This invention relates to one gradient transparent diffusion board with high brightness, which is applied to one down straight aphototropism set and comprises one diffusion board with at least one surface have multiple gradient lens to make the diffusion board improve optical effect and diffusion effect; the module has multiple gradient lens diffusion board to output best source with better even brightness. This invention diffusion board is combined with part or all optical film with optical film composed of prism lens, upper diffusion film and down diffusion film.
Description
Technical field
The present invention proposes a kind of high brightness diffusion plate, it is a kind of diffuser plate that applies to down straight aphototropism mode set, its surface has the structure of a plurality of trapezoid lens, to make the exportable better light source of down straight aphototropism mode set by these a plurality of trapezoid lens, reach the purpose that increases brightness and evenly spread simultaneously.
Background technology
In new flat-panel screens (Flat Panel Display) from generation to generation, LCD comes into one's own always, and has the display technique of development potentiality.Because Japan and Korea S and Taiwan Da Chang actively drop into research and development and adopt the production equipment that maximizes, the quality of LCD constantly promotes, and price keeps falling and driven the demand of LCD, makes that also the requirement of correlation technique development is strict more.In the development trend of LCD, mainly comprise, (1) area of increase glass substrate, factory after seven generation factories sustainable development to eight generation and nine generation factory, (2) manufacturing technology of colored filter innovation, comprise utilization mould molding processing procedure reducing cost, or break through the bottleneck of continuous process with Roller to Roller process technique.(3) Polarizer and phase retardation film are integrated, and adopt the extrusion processing procedure to replace traditional solution casting (casting) processing procedure.(4) outer electrode fluorescent tube and planar light source are mainly facilitated in the technical renovation of light source and blooming piece, enter the practicability stage fast, and led light source also is the direction that module backlight is mainly made great efforts to develop in addition.(5) integrated technique of diffusion sheet and lens optical diaphragm etc., more than all be the main direction of LCD Technology development.In in the present invention will the integrated technique at diffuser plate and prismatic lens (brightness enhancement film), proposing clear and definite structure and specific embodiment, and import volume production according to structure of the present invention, is the feasible technology of an essence.
LCD be by the electric field switch with the control picture displayed, liquid crystal panel itself can't emit beam, needing provide the display light source by module backlight.Generally speaking, the backlight liquid crystal display module can be divided into two kinds of forms according to the relative position of fluorescent tube 10 and light diffusion element 12, and it is the illuminated and down straight aphototropism mode set of side, shown in Figure 1A and Figure 1B.The illuminated module backlight of side shown in Figure 1A since fluorescent tube 10 quantity and light transmission apart from influence.High brightness and the light source that evenly spreads can't be provided on large-sized liquid crystal display applications, down straight aphototropism mode set is shown in Figure 1B, can be by the increase of fluorescent tube 10 numbers, and the design of diffused component, with the high brightness that reaches the large scale liquid crystal display and the even demand of diffusion.
See also Fig. 2, structural representation for the down straight aphototropism mode set of known LCD TV, the main framework of known down straight aphototropism mode set, from bottom to top be reflectance coating (Reflector) 20, cold cathode fluorescent lamp (CCFL) light source 22, diffuser plate (Diffusionplate) 24, following diffusion barrier (Diffuser sheet) 26, prismatic lens (Prism sheet) 28 and last diffusion barrier (Diffuser sheet) 30, connect liquid crystal panel 32 afterwards again.At liquid crystal screen and notebook computer, all belong to the side illumination mode.Because of a guy uses and closely watches, so need not to consider the horizontal view angle problem, therefore can be simultaneously with the luminous energy of level and vertical direction, arranging in pairs or groups two mutually perpendicular prismatic lenses 28 by light guide plate will be concentrated toward central point greater than the energy of miter angle, and reach the usefulness of blast.But on the purposes of LCD TV, have many people and view and admire demand simultaneously, having the horizontal view angle demand considers, usually in down straight aphototropism mode set, the prismatic lens 28 that uses the diffuser plate and the horizontal direction of arranging in pairs or groups is as brightness enhancement film, and the upper and lower diffusion barrier of arranging in pairs or groups is as light diffusion element.
Therefore, the present invention proposes a kind of diffuser plate with trapezoid micro-structure, is a kind of diffuser plate that applies to down straight aphototropism mode set, has the function of blast and homogenising.Can omit the use of prismatic lens in the use, and be a kind of easy bulk article, can reach the purpose that reduces cost.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of high brightness diffusion plate that applies to down straight aphototropism mode set.It is that the setting of diffuser plate surface has the structure of a plurality of trapezoid lens, to make the exportable better light source of down straight aphototropism mode set by these a plurality of trapezoid lens structures, reaches the purpose that increases brightness and even diffusion light simultaneously.
This diffuser plate is that plastics are squeezed into a sheet material through an extrusion processing procedure, and copies trapezoid lens simultaneously on trapezoidal mould roller, has the diffuser plate of trapezium structure with direct extrusion shaping one.In the use, can replace prismatic lens in the known techniques.Have the directly collocation diffusion barrier use down of diffuser plate of trapezium structure, promptly have the function of blast, thereby can reduce cost.In addition, this light diffusing sheet a plurality of smooth diffusion particles that more mix so that the output brightness of this light diffusing sheet is more even and then also can reduce the quantity of diffusion barrier, and reach the purpose that reduces cost.
The invention has the beneficial effects as follows: a kind of diffuser plate with trapezoid micro-structure of the proposition that is provided is a kind of diffuser plate that applies to down straight aphototropism mode set, has the function that increases brightness and evenly spread light.Can omit the use of prismatic lens in the use, and be a kind of easy bulk article, can reduce the cost of product.
Description of drawings
Figure 1A is the synoptic diagram of known down straight aphototropism mode set;
Figure 1B is the synoptic diagram of the illuminated module backlight of known side;
Fig. 2 is the structural representation of the down straight aphototropism mode set of known LCD TV;
Fig. 3 is the structural representation of a preferred embodiment of the present invention;
Fig. 4 is the synoptic diagram that a preferred embodiment of the present invention is implemented in down straight aphototropism mode set;
Fig. 5 A is the bright band synoptic diagram of known acrylic block;
Fig. 5 B is the bright band synoptic diagram of known prismatic lens;
Fig. 5 C is the bright band synoptic diagram of a preferred embodiment of the present invention;
Fig. 6 is the structural representation of another preferred embodiment of the present invention;
Fig. 7 is the structural representation of another preferred embodiment of the present invention;
Fig. 8 is the structural representation of another preferred embodiment of the present invention.
The figure number explanation:
10 fluorescent tubes, 12 light guide plate
14 diffuser plates, 20 reflectance coatings
22 fluorescent tubes, 23 acrylic blocks
26 times diffusion barriers of 24 diffuser plates
Diffusion barrier on 28 prismatic lenses 30
32 liquid crystal panels, 50 high brightness diffusion plates
51 diffusion particles, 52 trapezoid lens
54 UV-absorbing layer, 56 lens pillars
58 diffusion layers, 60 high brightness diffusion plates
70 high brightness diffusion plates, 80 high brightness diffusion plates
101 bright bands, 102 bright bands
103 bright bands
Embodiment
For making the auditor further understanding and understanding more be arranged to architectural feature of the present invention and the effect reached, sincerely help with preferred embodiment figure and cooperate detailed explanation, illustrate as the back:
As shown in Figure 3, the present invention is a kind of high brightness diffusion plate of tool trapezoid lens, and it is one to be applied to down straight aphototropism mode set.At least the one side of high brightness diffusion plate 50 wherein of the present invention is to have a plurality of trapezoid lens 52, and diffuser plate 50 is to be arranged on this a plurality of cathode fluorescent tubes (CCFL) light source.Because at least one mask of high brightness diffusion plate 50 of the present invention has a plurality of trapezoid lens 52, wherein two hypotenuses of trapezoid lens 52 have the structure of similar prismatic lens, therefore also possess the luminous energy that miter angle is outer toward middle function of assembling.By this, as shown in Figure 4, high brightness diffusion plate 50 of the present invention is arranged at a direct-type backlight module, and it from bottom to top is a reflectance coating 20, cold cathode fluorescent lamp light source 22, high brightness diffusion plate 50, connects liquid crystal panel 32 again after the diffusion barrier 26 down.So can make this down straight aphototropism mode set promote usefulness and reduce cost.
In order to make the auditor more can understand technology contents of the present invention, at first we do a control experiment earlier.At first get one 2 millimeters (mm) acrylic blocks 23 and place cathode fluorescent tube CCFL light source 22 tops, when not having other optics sheet materials or film to exist, the formed bright band 101 of lamp image can the significantly observed top that is present in the original lamp pipe position, shown in Fig. 5 A.Next get a prismatic lens 28 and place CCFL light source 22 tops, when not having diffuser plate to exist, the formed bright band 102 of lamp image can also significantly be observed, but the bright band 102 of finding former CCFL fluorescent tube becomes two formed bright bands 102 of fluorescent tube after prismatic lens 28 refractions, and bright band 102 position distribution are on two limits of fluorescent tube physical location center line, shown in Fig. 5 B.
The present invention is in order to improve the inhomogeneous situation that prismatic lens is divided into two through lamp image, so we excise the most advanced and sophisticated position of the triangular structure top of prismatic lens to form a trapezium structure, as shown in Figure 3 originally.And, can adjust the ratio of positive bright dipping by upper base length that changes trapezium structure and height, provide better diffusion uniformity, and two hypotenuses of this trapezium structure also have the function of prismatic lens optically focused.Therefore, shown in Fig. 5 C, this diffuser plate 50 with trapezoid lens is positioned over CCFL light source 22 tops, when not having diffuser plate to exist, the formed bright band of lamp image can also significantly be observed.But find former CCFL fluorescent tube bright band after trapezoid lens 52 refractions, the exiting surface of diffuser plate 50 can produce three bright bands 103.Therefore, present more and more equally distributed bright band 103.
The present invention proposes with the exiting surface of trapezoid lens as diffuser plate, as shown in Figure 3, assembling the outer energy of miter angle, and the bright band of fluorescent tube is more evenly distributed.By trapezoidal hypotenuse fluorescent tube is influenced homogenising by high brightness diffusion plate of the present invention, this is a kind of effect of surface structure diffusion.The another one diffusional effect is put at the suitable diffusion particle of the inner interpolation of diffuser plate.One add more a spot of diffusion particle in the trapezoid lens high brightness diffusion plate of being mentioned in the present invention, the light penetration of the whole diffuser plate that makes rises to 75%-85% by traditional 55%-65%, thereby reaches the effect that increases brightness again.Therefore employed in the present invention trapezoid lens high brightness diffusion plate has increase brightness concurrently, also can be with lamp image homogenising more.Result according to test can find, uses one-two of trapezoid lens high brightness diffusion plate collocation diffusion barrier sheet of the present invention, both can obtain the effect identical with using prismatic lens.Therefore, use trapezoid lens high brightness diffusion plate of the present invention, can be issued to identical brightness in the condition of not using prismatic lens, and reach the purpose that reduces cost.
In the present invention, the plastics of trapezoid lens high brightness diffusion plate are to be selected from polycarbonate resin (Polycarbonate, PC), polymethylmethacrylate (Poly (Methylmethacrylate), PMMA), the multipolymer of polymethylmethacrylate and polystyrene (Poly (Methyl methacrylate) Styrene, MS), polystyrene materials such as (polystyrene) one of them form.And the material of diffusion particle is to be selected from polymethylmethacrylate (Poly (Methyl methacrylate), PMMA), monox (Silica), silica gel (Silicon), polystyrene (PolyStyrene, PS), poly cyanamid (Melamin), lime carbonate, one of them of the combination that Teflon etc. are above-mentioned.
High brightness diffusion plate 50 of the present invention is that plastics are squeezed into a sheet material through an extrusion processing procedure, and on the trapezoidal mould roller of an extruder, copy a plurality of trapezoid lens simultaneously, with the direct extrusion diffuser plate with trapezoid lens that is shaped, wherein this diffuser plate is formed in one with these a plurality of trapezoid lens.
Another preferred embodiment of the present invention as shown in Figure 6, the manufacture method of high brightness diffusion plate 60 of the present invention is to adopt extrusion processing procedure (co-extrusion) altogether, it is by having the linear velocity of extrusion processing procedure with per minute 2 meters (2m/min) altogether plastics to be squeezed into 1500 millimeters of fabric widths (mm), thickness is the diffuser plate 60 of 1.5 millimeters (mm), incidence surface at high brightness diffusion plate 60 is coated with a uvioresistant absorption layer 54 simultaneously, and its thickness is 50 microns to 200 microns.And on the trapezoidal mould roller of an extruder, copy a plurality of trapezoid lens simultaneously, have the high brightness diffusion plate 60 of trapezium structure 52 with direct extrusion shaping one.Upper base in trapezium structure is 100 microns, and going to the bottom is 300 microns, highly is 100 microns, and its structure is shown in shown in Figure 6.(Poly methyl-methacrylate/Styrene MS) is the base material of diffuser plate to use the polymethylmethacrylate of Japanese electric apparatus chemistry and the co-polymer of polystyrene in the present embodiment.And the diffusion particle 51 of interpolation 1%-10%PMMA material.According to two following diffusion barriers of high brightness diffusion plate 60 collocation of Fig. 6, with device 1 " in the liquid crystal display television by using down straight aphototropism mode set.Wherein high brightness diffusion plate 60 makes this down straight aphototropism mode set not be provided with under the situation of prismatic lens at this, has quite high brightness and covers fluorescent tube ability and diffusion effect, and can reach the purpose that reduces cost.
See also Fig. 7, be the structural representation of another preferred embodiment of the present invention.As shown in Figure 7, high brightness diffusion plate that present embodiment proposes 70, its exiting surface are trapezium structure 52.The another side of high brightness diffusion plate 70, incidence surface also have a plurality of microstructures, and it is a lens pillar (Lenticular lens) 56.The high brightness diffusion plate 70 of Fig. 7, employed material embodiment one is identical, but the addition of diffusion particle 51 reduces 1%-5%.
The main difference of Fig. 6 and Fig. 7 is that the diffuser plate 60 of Fig. 6 only simultaneously has a plurality of trapezoid lens 52, and two of the high brightness diffusion plate 70 of Fig. 7 all have lens, and it is a plurality of trapezoid lens 52 and a plurality of lens pillars 56.As shown in Figure 7, the incidence surface of diffuser plate 70 is designed to lens pillar, and its function also is a homogenising light, and improves the bright dipping visual angle of light, and improves its uniformity coefficient.Also, can advance the addition of a minimizing diffusion particle 51 because of the two-sided of high brightness diffusion plate 70 at Fig. 7 all has the microstructure of astigmatism effect to exist.The light penetration rate of the high brightness diffusion plate 70 of the Fig. 7 that makes reaches more than 85%, thereby reaches the effect that brightness promotes more.According to the high brightness diffusion plate 70 of the two-sided lens structure of Fig. 7, the diffusion barrier of arranging in pairs or groups, and device is in the down straight aphototropism mode set of one 32 LCD TV.This down straight aphototropism mode set is not in being provided with prismatic lens and reducing under the situation of a slice diffusion barrier, and have higher brightness and identically cover the fluorescent tube ability, and the identical diffusion effect of tool, and reach the purpose that reduces cost and reduce.
See also Fig. 8, it is the structural representation of another preferred embodiment of the present invention.Wherein the main body of the high brightness diffusion plate that is not both Fig. 3 50 of Fig. 3 and Fig. 8 is added diffusion particle 51, and the main body of the high brightness diffusion plate 80 of Fig. 8 is not added diffusion particle 51.High brightness diffusion plate 80 of the present invention is to utilize extrusion processing procedure altogether that diffusion layer 58 is formed at the skin of high brightness diffusion plate 80, and it is the top layer and the bottom of trapezium structure.Wherein the thickness of diffusion layer 58 is 50 microns to 200 microns.In addition, diffusion layer 58 more can add the diffusion particle 51 of high concentration, can obtain better screening effect and light homogeneity like this, and can reduce the use amount of diffusion particle 51, and reaches the purpose that reduces cost.
The above, it only is a preferred embodiment of the present invention, be not to be used for limiting scope of the invention process, all equalizations of doing according to the described shape of claim scope of the present invention, structure, feature and spirit change and modify, and all should be included in the interest field of the present invention.
Claims (17)
1, a kind of diffuser plate of tool trapezoid lens, it is to be arranged at a direct-type backlight module, it is characterized in that, this tool trapezoid lens structure diffuser plate includes:
One diffusion version is arranged on a plurality of light sources of this down straight aphototropism mode set, and at least one mask of this diffuser plate has a plurality of trapezoid lens.
2, diffuser plate as claimed in claim 1 is characterized in that, the gross thickness of this diffuser plate is 0.5 millimeter to 5 millimeters.
3, diffuser plate as claimed in claim 1 is characterized in that, each trapezoid lens structure comprises a upper base and goes to the bottom, and the width of this upper base is 20 microns to 500 microns, and this width of going to the bottom is 100 microns to 800 microns.
4, diffuser plate as claimed in claim 3 is characterized in that, the height of each trapezoid lens structure is 20 microns to 500 microns.
5, diffuser plate as claimed in claim 1 is characterized in that, this diffuser plate is to use plastics to see through an extrusion processing procedure moulding, so that these a plurality of trapezoid lens and this diffuser plate are one-body molded.
6, diffuser plate as claimed in claim 5 is characterized in that, these plastics are one of them of the multipolymer that is selected from polycarbonate resin, polymethylmethacrylate, polymethylmethacrylate and polystyrene, polystyrene and above-mentioned combination.
7, diffuser plate as claimed in claim 5, it is characterized in that this extrusion processing procedure is for having the extrusion processing procedure altogether, it is to utilize these plastics in this diffuser plate of extruder extrusion, it is to allow at least one mask of this diffuser plate that a plurality of trapezoid lens are arranged, and a UV-absorbing layer.
8, diffuser plate as claimed in claim 7 is characterized in that, this UV-absorbing layer is a surface that is formed at this diffuser plate, to absorb the ultraviolet light of these a plurality of light sources.
9, diffuser plate as claimed in claim 7 is characterized in that, the thickness of this UV-absorbing layer is 50 microns to 500 microns.
10, diffuser plate as claimed in claim 5 is characterized in that, this extrusion processing procedure is to utilize these plastics in this diffuser plate of extruder extrusion, and its at least one mask has a plurality of trapezoid lens.
11, diffuser plate as claimed in claim 5 is characterized in that, this extrusion processing procedure is to utilize this diffuser plate of extruder extrusion, so that the one side of this diffuser plate has a plurality of trapezoid lens, and the another side of this diffuser plate has a plurality of lens pillars.
12, diffuser plate as claimed in claim 5 is characterized in that, this extrusion processing procedure is to utilize this diffuser plate of extruder extrusion, so that at least one mask of this diffuser plate has a plurality of trapezoid lens, and the another side of this diffuser plate has a plurality of prismatic lenses.
13, diffuser plate as claimed in claim 5 is characterized in that, this extrusion processing procedure is to cooperate extrusion processing procedure altogether, so that at least one mask of this diffuser plate has a plurality of trapezoid lens, and a surface diffusion layer.
14, diffuser plate as claimed in claim 13 is characterized in that, this surface diffusion layer is the one side at least that is formed at this diffuser plate.
15, diffuser plate as claimed in claim 13 is characterized in that, the thickness of this surface diffusion layer is 50 microns to 500 microns.
16, diffuser plate as claimed in claim 1 is characterized in that, this diffuser plate more comprises a plurality of diffusion particles, and its percentage by weight is that one of percentage is to 10.
17, diffuser plate as claimed in claim 16 is characterized in that, these a plurality of diffusion particles are for being selected from polymethylmethacrylate, monox, silica gel, polystyrene, poly cyanamid, lime carbonate, one of them of Teflon and above-mentioned combination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101410314A CN1924620B (en) | 2006-09-28 | 2006-09-28 | Trapezoid lens high brightness diffusion plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101410314A CN1924620B (en) | 2006-09-28 | 2006-09-28 | Trapezoid lens high brightness diffusion plate |
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| CN1924620A true CN1924620A (en) | 2007-03-07 |
| CN1924620B CN1924620B (en) | 2011-12-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102007033300A1 (en) | 2007-07-18 | 2009-01-29 | Bayer Materialscience Ag | Light-guiding surface structure |
| EP2309316A1 (en) | 2009-10-09 | 2011-04-13 | Bayer MaterialScience AG | LED illumination unit with structured dispersion film |
| CN101183191B (en) * | 2006-11-13 | 2011-05-11 | 嘉威光电股份有限公司 | Straight down type backlight module and its diffusing plate molding method |
| US8580372B2 (en) | 2007-11-09 | 2013-11-12 | Eternal Chemical Co., Ltd. | Optical film |
| CN104094204A (en) * | 2011-11-28 | 2014-10-08 | 内奥诺德公司 | Optical elements with alternating reflective lens facets |
| CN105929601A (en) * | 2016-07-07 | 2016-09-07 | 福建正德光电科技有限公司 | Diffusion plate with dual-side lens, diffusion-free film and bright-enhancement-free film for liquid crystal display |
| CN106895306A (en) * | 2017-02-22 | 2017-06-27 | 横店集团得邦照明股份有限公司 | A kind of side entering type is without light guide plate LED flat lamp |
| CN108445673A (en) * | 2018-03-02 | 2018-08-24 | 张家港康得新光电材料有限公司 | A kind of optic film structure and backlight assembly |
| CN109307897A (en) * | 2018-11-23 | 2019-02-05 | 淮阴工学院 | It is a kind of can be around the preparation method of the optical diffusion film of folding |
| CN110346969A (en) * | 2019-06-14 | 2019-10-18 | 惠州市华星光电技术有限公司 | A kind of backlight module and display device |
| CN110376793A (en) * | 2019-07-23 | 2019-10-25 | 安徽省蚌埠华益导电膜玻璃有限公司 | A kind of brightness enhancement film and its backlight module |
| US11669210B2 (en) | 2020-09-30 | 2023-06-06 | Neonode Inc. | Optical touch sensor |
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| JP4127517B2 (en) * | 2003-03-25 | 2008-07-30 | 大日本印刷株式会社 | Diffusion sheet and transmissive screen |
| CN1996099A (en) * | 2005-12-31 | 2007-07-11 | 财团法人工业技术研究院 | Optical modulation assembly |
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| CN101183191B (en) * | 2006-11-13 | 2011-05-11 | 嘉威光电股份有限公司 | Straight down type backlight module and its diffusing plate molding method |
| US7701634B2 (en) | 2007-07-18 | 2010-04-20 | Bayer Materialscience Ag | Light-guiding surface structure |
| DE102007033300A1 (en) | 2007-07-18 | 2009-01-29 | Bayer Materialscience Ag | Light-guiding surface structure |
| US8580372B2 (en) | 2007-11-09 | 2013-11-12 | Eternal Chemical Co., Ltd. | Optical film |
| EP2309316A1 (en) | 2009-10-09 | 2011-04-13 | Bayer MaterialScience AG | LED illumination unit with structured dispersion film |
| EP2312383A1 (en) | 2009-10-09 | 2011-04-20 | Bayer MaterialScience AG | LED illumination unit with structured dispersion film |
| CN104094204B (en) * | 2011-11-28 | 2017-12-12 | 内奥诺德公司 | Optical element with alternate mirror lens crystal face |
| CN104094204A (en) * | 2011-11-28 | 2014-10-08 | 内奥诺德公司 | Optical elements with alternating reflective lens facets |
| CN105929601A (en) * | 2016-07-07 | 2016-09-07 | 福建正德光电科技有限公司 | Diffusion plate with dual-side lens, diffusion-free film and bright-enhancement-free film for liquid crystal display |
| CN106895306A (en) * | 2017-02-22 | 2017-06-27 | 横店集团得邦照明股份有限公司 | A kind of side entering type is without light guide plate LED flat lamp |
| CN108445673A (en) * | 2018-03-02 | 2018-08-24 | 张家港康得新光电材料有限公司 | A kind of optic film structure and backlight assembly |
| CN109307897A (en) * | 2018-11-23 | 2019-02-05 | 淮阴工学院 | It is a kind of can be around the preparation method of the optical diffusion film of folding |
| CN110346969A (en) * | 2019-06-14 | 2019-10-18 | 惠州市华星光电技术有限公司 | A kind of backlight module and display device |
| US11353744B2 (en) | 2019-06-14 | 2022-06-07 | Huizhou China Star Optoelectronics Technology Co., Ltd. | Backlight module and display device |
| CN110376793A (en) * | 2019-07-23 | 2019-10-25 | 安徽省蚌埠华益导电膜玻璃有限公司 | A kind of brightness enhancement film and its backlight module |
| US11669210B2 (en) | 2020-09-30 | 2023-06-06 | Neonode Inc. | Optical touch sensor |
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