CN102042565A - Brightness enhancement film, backlight module having same and manufacturing method of brightness enhancement film - Google Patents
Brightness enhancement film, backlight module having same and manufacturing method of brightness enhancement film Download PDFInfo
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- CN102042565A CN102042565A CN2009102046403A CN200910204640A CN102042565A CN 102042565 A CN102042565 A CN 102042565A CN 2009102046403 A CN2009102046403 A CN 2009102046403A CN 200910204640 A CN200910204640 A CN 200910204640A CN 102042565 A CN102042565 A CN 102042565A
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Abstract
The invention relates to a brightness enhancement film, a backlight module having the same and a manufacturing method of the brightness enhancement film. The brightness enhancement film comprises a transparent layer, a cylindrical lens structure and a reflecting layer, wherein the cylindrical lens structure and the reflecting layer are respectively arranged on two joint surfaces of the transparent layer, the cylindrical lens structure is provided with a plurality of projecting parts, each reflecting region accurately corresponds to the space between every two projecting parts, and an optical path corresponding to the projecting part is formed between every two reflecting regions. Thus, based on the combination of the members, the optical path from the reflecting layer to the cylindrical lens structure can be effectively limited, thereby improving the light utilization ratio. Meanwhile, by using the reflecting structure of the brightness enhancement film, the optical structural path is effectively improved to pilot and condense light beams with larger angles, thereby being applicable to a backlight module to enhance the light-emitting brightness.
Description
Technical field
The present invention relates to a kind of brightness enhancement film, have backlight module, and the preparation method of brightness enhancement film of brightness enhancement film, be particularly related to a kind of by the combination of members such as lens pillar structure, hyaline layer and reflecting layer, by the variation between each structure of brightness enhancement film, to be applied in the backlight module, improve the brightness enhancement film at its briliancy and visual angle, the preparation method and the backlight module thereof of brightness enhancement film.
Background technology
See also shown in Figure 1ly, be a kind of schematic diagram of known diffuse optical diaphragm.In this known technology, mainly on a transparent membrane 10a, form a diffusion barrier 11a, and many particulate 12a of diffusion barrier 11a interpolation, in order to carry out light refraction, reflection and scattering process, to reach the effect of diffusion light.Yet, because particulate 12a is the light scattering, and the comparatively coarse cause of formed diffusion barrier surface 110a, so that the excessive scattering of light, and cause the printing opacity of diffusion barrier 11a not good; Therefore, will the light source in the backlight module can't effectively be utilized, cause luminosity deficiency, uneven situation to take place, and make that the proportion of goods damageds of light source are too high.
Cause this,, cause the relatively poor problem of backlight module luminous efficiency, propose the known technology that improves in addition in order to improve known technology luminosity deficiency.
See also shown in Figure 2ly, be a kind of known structure of reflection reducting coating accompanying drawing that is applied in the backlight liquid crystal display module, be used to improve whole luminous efficiency.As shown in the figure, this structure of reflection reducting coating 1b comprises: a main part 10b and a plurality of prism structure 11b.Described a plurality of prism structure 11b is all the triangular prism shape, and is ordered on the main part 10b; Wherein,, make most of light concentrate on less bright dipping visual angle, reach the light-ray condensing effect by structure of reflection reducting coating 1b.Yet, on bigger bright dipping visual angle, still cause luminous other light can't active set in, cause the situation of light leak to take place, thereby reduce bright dipping visual angle angle.Wherein, the prism structure part of relevant brightness enhancement film develops and multiple correlation technique, reaches luminous efficiency to utilize specific technological means.
(1) as in the U.S. Pat 5917664, disclose a kind of brightness enhancement film with prism structure, wherein per two prism structures in pairs, and two corner angle or paddy angle are all identical.By prism structure, make light reach low visual angle and go out light effect, so have good illumination efficiency via this brightness enhancement film.Yet this technology is not improved brightness enhancement film yet in great visual angle the time, light leakage phenomena occurs.
(2) as among the U.S. Pat 6707611B2, disclose a kind of blooming with repeated prism, can be used for eliminating the even problem of light luminance nonuniformity; Yet this technology is not improved blooming yet than wide-angle the time, the problem of luminous light leak.
In above-mentioned known technology, though can increase luminous efficiency by brightness enhancement film; Yet, still can't improve light via brightness enhancement film after, in the problem of luminous light leak with great visual angle.
Be with, though known brightness enhancement film makes luminous efficiency preferable because of light being concentrated convergence, also can't improve no bright dipping visual angle, cause the reduction of bright dipping visual angle; Moreover above-mentioned brightness enhancement film utilizes prism structure as its planform, thereby causes scraping of structure to decrease and the abrasion problem easily, and then influences the whole light effect that goes out.
Edge is, the inventor is at above-mentioned defective, and according to the correlation experience of being engaged in for many years in this respect, the concentrated observation and research, and cooperate the utilization of scientific principle, and propose a kind of reasonable in design and effectively improve the invention of above-mentioned defective.
Summary of the invention
Main purpose of the present invention provides a kind of brightness enhancement film, has the backlight module of brightness enhancement film, and the preparation method of brightness enhancement film.By lens pillar structure, hyaline membrane and the reflecting layer of brightness enhancement film, by the combination between above-mentioned each member, make the opticpath that enters the lens pillar structure from the reflecting layer to be limited effectively, and then increase light utilization efficiency.
Another object of the present invention is to, catoptric arrangement by brightness enhancement film, with improvement optical texture path, the bigger light correcting of angle is concentrated, effectively increase light utilization efficiency, improve luminosity to be applied to backlight module, also can further pass through the interpolation of diffusion particulate, and then the size at control light diffusance and bright dipping visual angle.With by structure of reflection reducting coating, reach the glorious degrees and the visual angle size of whole backlight module.
Another purpose of the present invention is, by the shaped design of lens pillar structure, to improve its surface abrasion resistance, avoids scratch to influence light effect easily.
In order to reach above-mentioned purpose, the invention provides a kind of brightness enhancement film, comprising: a hyaline layer, a lens pillar structure and a reflecting layer.Wherein hyaline layer has two opposite composition surfaces; Lens pillar structure (lenticular) is arranged on the composition surface of hyaline layer, and the lens pillar structure has an exiting surface; The reflecting layer is arranged on hyaline layer and the composition surface with respect to the lens pillar structure, the reflecting layer has the colloid part in a plurality of echo areas and a fixation reflex district, wherein this echo area is one to be added with the nontransparent resin of a plurality of reflective particle, the diameter of this reflective particle is between 0.1 μ m～30 μ m, described a plurality of reflective particle is 1/1000～1/2 with the part by weight of the composition interpolation of this nontransparent resin, and this colloid part is one to be added with a plurality of refraction particulates and to link the transparent resin layer of this echo area and this hyaline layer, the diameter of this refraction particulate is between 0.5 μ m～30 μ m, and the part by weight of the composition of described a plurality of refraction particulates and this transparent resin layer is 1/10000～1/2.Wherein, exiting surface has a plurality of protuberances, and colloid part is positioned each echo area on the hyaline layer, and each echo area is accurately between per two protuberances of correspondence, forming an optical path between per two echo areas, and this optical path is exactly corresponding to the protuberance of this exiting surface.
The present invention provides a kind of backlight module with brightness enhancement film again, comprising: a reflector, a ccontaining illuminating source; One diffuser plate is arranged at the top of this illuminating source; One brightness enhancement film is arranged at the top of this diffuser plate; One panel is arranged at the top of this blast diffusion barrier; One framework matches with this reflector, and encapsulates this diffuser plate, brightness enhancement film and panel together.Thereby this illuminating source is via this diffuser plate, and by this brightness enhancement film, forms luminous uniformly in panel surface.
The present invention provides a kind of preparation method of brightness enhancement film in addition, and step is as follows: a hyaline layer is provided, and it has two opposite composition surfaces; One lens pillar structure (lenticular) is provided, and it has an exiting surface, and this exiting surface is formed with a plurality of protuberances, with this lens pillar structural engagement on a composition surface of this hyaline layer, and outwardly with this exiting surface; One reflecting layer is provided, it has the colloid part of a plurality of echo areas and fixing described a plurality of echo areas, wherein this echo area is one to be added with the nontransparent resin of a plurality of reflective particle, the diameter of this reflective particle is between 0.1 μ m～30 μ m, described a plurality of reflective particle is 1/1000～1/2 with the part by weight of the composition interpolation of this nontransparent resin, and this colloid part is one to be added with a plurality of refraction particulates and to link the transparent resin layer of this echo area and this hyaline layer, the diameter of this refraction particulate is between 0.5 μ m～30 μ m, and the part by weight of the composition of described a plurality of refraction particulates and this transparent resin layer is 1/10000～1/2; This colloid part is arranged at this hyaline layer and relatively on the composition surface of this lens pillar structure, and each echo area is accurately corresponding between per two protuberances; Form an optical path between per two reflector spaces, wherein this optical path is exactly corresponding to the protuberance of this lens pillar structure.
Reach technology, means and the effect that predetermined purpose is taked in order further to understand the present invention, see also following about detailed description of the present invention and accompanying drawing, believe purpose of the present invention, feature and characteristics, go deep into and concrete understanding when getting one thus, yet appended accompanying drawing only provides reference and explanation usefulness, is not to be used for the present invention is limited.
Description of drawings
Fig. 1 is a kind of schematic diagram of known diffuse optical diaphragm.
Fig. 2 is the schematic diagram of the structure of reflection reducting coating in a kind of known backlight module.
Fig. 3 is the combination schematic diagram of brightness enhancement film one preferred embodiment of the present invention.
Fig. 4 is the decomposing schematic representation of brightness enhancement film Fig. 3 of the present invention.
Fig. 5 is the structure enlarged drawing in the reflecting layer among brightness enhancement film Fig. 4 of the present invention.
Fig. 6 is the combination schematic diagram of brightness enhancement film second embodiment of the present invention.
Fig. 7 is the combination schematic diagram of brightness enhancement film the 3rd embodiment of the present invention.
Fig. 8 is the combination schematic diagram of brightness enhancement film the 4th embodiment of the present invention.
Fig. 9 A is the combination schematic diagram of brightness enhancement film the 5th embodiment of the present invention.
Fig. 9 B indicates the partial enlarged drawing of A among brightness enhancement film Fig. 9 A of the present invention.
Figure 10 is the process block diagram of the preparation method of brightness enhancement film of the present invention.
Figure 11 uses a roller technology mode among the present invention, lens pillar structure and reflecting layer is pressed on the schematic diagram that engages.
Figure 12 is applied to the decomposing schematic representation of a backlight module for brightness enhancement film of the present invention.
The main element description of symbols
[known technology]
Transparent membrane 10a
Diffusion barrier 11a diffusion barrier surface 110a
Particulate 12a
Structure of reflection reducting coating 1b
[the present invention]
The composition surface 21 on the hyaline layer 2
Following composition surface 22
4 echo areas 40, reflecting layer
Colloid part 41
Refraction particulate 410
Diffusion particulate 51
Diffuser plate 6
Framework 9 light-emitting windows 90
Optical path L
Roller R1, R2
The specific embodiment
See also Fig. 3 and shown in Figure 4, be the accompanying drawing of brightness enhancement film one preferred embodiment of the present invention.This brightness enhancement film 1 comprises: a hyaline layer 2, a lens pillar structure 3 and a reflecting layer 4.
This hyaline layer 2 has on one composition surface 21 and composition surface 22 once.This hyaline layer 2 is a hyaline membrane, it is the transparent material in a connection column lens arrangement 3 and reflecting layer 4, and wherein hyaline membrane is the transparent material of PETG (PET), Merlon (PC), acryl (PMMA) or Triafol T (TAC).
This lens pillar structure 3 is arranged on the last composition surface 21 of this hyaline layer 2; This lens pillar structure 3 is one to have the transparent material of high index of refraction, such as transparent materials such as ultraviolet hardening resin, thermosetting resin or plastics, makes the light can the parallel ejaculation by lens pillar structure 3, and impels the light convergence to reach brightening effect.This lens pillar structure 3 has an exiting surface 30, this exiting surface 30 has a plurality of protuberances 31, described a plurality of protuberance 31 is a protuberance 31 in order to the light correcting is concentrated, and protuberance 31 is one to have the protrusion shape that light is assembled, for example: circular, oval, triangle or square geometry; With the design by protuberance 31, effectively make and carry out correcting than high angle scattered light and concentrate, to reach light convergence brightening effect.
This reflecting layer 4 is arranged at the following composition surface 22 of this hyaline layer 2, with respect to this lens pillar structure 3, is used to limit light via hyaline layer 2 and enter lens pillar structure 3.Wherein reflecting layer 4 has the colloid part 41 in a plurality of echo areas 40 and a fixation reflex district 40.As shown in Figure 4, this colloid part 41 coats echo area 40 and utilizes hyaline layer 2 modes that are attached to, each echo area 40 is located on the hyaline layer 2, simultaneously, each echo area 40 is accurately corresponding between per two protuberances 31, make 40 of per two echo areas form an optical path L, this optical path L is exactly corresponding to the protuberance 31 of exiting surface 30.
Inject the optical path L of this lens pillar structure 3 to form restriction light, and make other not inject optical path L light to reflect, to increase light utilization.In the design of the present invention, the range size of optical path L is 1/3～1/100 a width size of lens pillar structure 3, so that part light is injected outside the optical path L, other echo area 40 that all is reflected layer 4 stops.
See also shown in Figure 5ly, the echo area 40 in this reflecting layer 4 is a semi-circular shape, and its material is for adding the nontransparent resin of most reflective particle 400, with so that reflection ray can evenly disperse.In the present invention, nontransparent resin is UV resin, thermosetting resin or epoxy resin, and reflective particle is inorganic or the high index of refraction material.In the present invention, the diameter of reflective particle 400 is the best with 0.1 μ m～30 μ m, and it is shaped as a circle, ellipse or irregularly shaped, and in addition, reflective particle 400 is the best with the part by weight of the composition of nontransparent resin with 1/1000～1/2.Described a plurality of echo area 40 is shaped as a circle, triangle, oval-shaped geometry.As the different embodiment with second and third kind shown in Figure 7 of Fig. 6, described a plurality of echo areas 40 can be a triangle or oblong-shaped, along with light different inject angle, to carry out reflection and refraction action in various degree.As shown in the table, through after the experiment as can be known, the corresponding effect that reflective particle 400 time is produced in different condition (" diameter of reflective particle " reach the composition part by weight of nontransparent resin " reflective particle with "):
| The diameter of reflective particle (μ m) | The composition part by weight (W) of reflective particle and nontransparent resin | Light is through the reflectivity (%) of echo area | The uniformity of reflective particle in nontransparent resin | Assessment |
| ＜0.1 | ＜1/1000 | 37％ | Be uniformly dispersed | Bad |
| ＜0.1 | ＞1/2 | 88％ | Disperse inhomogeneous | Bad |
| 10 | 1/10 | 80％ | Be uniformly dispersed | Very |
| 15 | 1/5 | 85％ | Be uniformly dispersed | Very |
| ＞30 | ＜1/1000 | 33％ | Be uniformly dispersed | Bad |
| ＞30 | ＞1/2 | 87％ | Disperse inhomogeneous | Bad |
In addition, this colloid part 41 is the transparent resin layer of a binding echo area 40 and hyaline layer 2, and wherein this transparent resin layer is added with a plurality of refraction particulates 410, in order to control light diffusance.Transparent resin layer is transparent materials such as UV resin, thermosetting resin or epoxy resin, and refraction particulate 410 is acryl (PMMA), Merlon (PC) or polystyrene transparent materials such as (PS).The diameter of each refraction particulate 410 is the best with 0.5 μ m～30 μ m, and it is shaped as a circle, ellipse or irregularly shaped.Aspect the adding proportion of colloid part 41 compositions, refraction particulate 410 is the best with the part by weight of the composition of transparent resin layer with 1/10000～1/2.As shown in the table, through after the experiment as can be known, the corresponding effect that refraction particulate 410 is produced down in different condition (" diameter of reflective particle " reach the composition ratio of nontransparent resin " reflective particle with "):
| The diameter of reflective particle (μ m) | The composition part by weight (W) of reflective particle and nontransparent resin | Light is through the penetrance (%) of echo area | Mist degree (Hz) | 1/2 visual angle | Assessment | |
| ＜0.5 | ＜1/1000 | 90％ | 0.38％ | 25 degree | Bad | |
| ＜0.5 | ＞1/2 | 48％ | 83％ | 63 | Bad | |
| 8 | 1/200 | 88％ | 1％ | 38 degree | Very | |
| 13 | 1/300 | 89％ | 0.8％ | 33 degree | Very | |
| ＞30 | ＜1/1000 | 89％ | 0.5％ | 26 degree | Bad | |
| ＞30 | ＞1/2 | 43％ | 80％ | 58 degree | Bad |
See also shown in Figure 8ly, be the combination schematic diagram of the 4th kind of embodiment of brightness enhancement film of the present invention.The difference of present embodiment and the foregoing description is: 4 the part in the reflecting layer, described a plurality of echo area 40 can be fixedly arranged at the below of colloid part 41, be attached to this hyaline layer 2 times by this colloid part 41, make each echo area 40 accurately be positioned 31 of per two protuberances of lens pillar structure 3.Similarly, can make optical path L accurately corresponding to protuberance 31, make light inject outside the optical path L, other is all stopped by the echo area 40 in this reflecting layer 4.
See also shown in Fig. 9 A and Fig. 9 B, be the relevant drawings of the 5th kind of enforcement of brightness enhancement film of the present invention.The main difference of present embodiment and the various embodiments described above is: brightness enhancement film 1 comprises that also one evenly is formed at the diffusion layer 5 of the exiting surface 30 of lens pillar structure 3.Particularly, diffusion layer 5 is attached to the surface of protuberance 31, make light concentrate parallel ejaculation via lens pillar structure 3 after, by diffusion layer 5 light is dispersed immediately.Wherein, diffusion layer 5 is the plastic material of a high index of refraction, and perhaps, diffusion layer 5 has a transparent resin portion 50 and a plurality of diffusion particulate 51 (as Fig. 9 B).Transparent resin portion 50 coats diffusion particulate 51, and is formed on the protuberance 31, utilizes diffusion particulate 51 and control light diffusance and visual angle.Wherein transparent resin portion 50 is transparent materials such as UV resin, thermosetting resin or epoxy resin.Diffusion particulate 51 is acryl (PMMA), Merlon (PC) or polystyrene transparent materials such as (PS), and diffusion particulate 51 diameters are the best with 0.5 μ m～30 μ m, on the composition mixed proportion, diffusion particulate 51 is the best with the part by weight of the composition interpolation of transparent resin portion 50 with 1/10000～1/2.
See also shown in Figure 10ly, be the preparation method of brightness enhancement film of the present invention, cooperate Fig. 3 and shown in Figure 4 simultaneously, its step is as follows: at first, provide a hyaline layer 2, it has two opposite composition surfaces (S100), is respectively on one composition surface 21 and composition surface 22 once; Secondly, provide a lens pillar structure 3, it has an exiting surface 30, and this exiting surface 30 is formed with a plurality of protuberances 31, this lens pillar structure 3 is engaged on the last composition surface 21 of this hyaline layer 2, and with this exiting surface 30 (S102) outwardly; Next, provide a reflecting layer 4, it has the colloid part 41 (S104) of a plurality of echo areas 40 and fixing described a plurality of echo areas 40; Moreover, this colloid part 41 is arranged on this hyaline layer 2 and the following composition surface 22 with respect to lens pillar structure 3, and each echo area 40 is accurately corresponding between per two protuberances 31 (S106); Then, form an optical path L between per two echo areas 40, this optical path L is exactly corresponding to the protuberance 31 (S108) of this lens pillar structure 3; At last, finish a brightness enhancement film 1 structure (S110).
In the preparation method of above-mentioned brightness enhancement film,, lens pillar structure 3 and reflecting layer 4 are arranged on upper and lower two composition surfaces 21,22 of this hyaline layer 2 together by a predetermined pressing or coating means.At above-mentioned two kinds of different means, it is described as follows:
First kind, by pressing means, make lens pillar structure 3 and reflecting layer 4 can be arranged at together hyaline layer 2 on.See also shown in Figure 11ly, in the present invention, use a roller technology mode, lens pillar structure 3 and reflecting layer 4 are pressed on the schematic diagram of hyaline layer 2.Particularly, utilize protuberance 31 modes of the accurate corresponding lens pillar structure 3 of optical path L, and utilize two roller R1, R2 to carry out roll extrusion, wherein with two roller R1, R2 that have lens pillar structure and reflecting layer respectively, roll extrusion is on the upper and lower composition surface 21,22 of this hyaline layer 2 respectively, make a reflecting layer 4 and a lens pillar structure 3 be pressed on 2 two relative bonding faces of hyaline layer, utilize ultraviolet light to carry out exposure irradiation again, to finish brightness enhancement film 1 structure.
Second kind,, reflecting layer 4 can be arranged on the hyaline layer 2 by coating means.And lens pillar structure 3 is affixed on the hyaline layer 2.Wherein utilize protuberance 31 modes of the accurate corresponding lens pillar structure 3 of optical path L, reflecting layer 4 coating are being covered on hyaline layer 2, and lens pillar structure 3 is attached on the hyaline layer 2, finish brightness enhancement film 1 structure.
In addition, also can selectivity a diffusion layer 5 be set, make diffusion layer 5 evenly cover in protuberance 31 at the exiting surface 30 of lens pillar structure 3.Wherein, diffusion layer 5 is formed at the exiting surface 30 of lens pillar structure 3 by pressing or coating means.Wherein, if when carrying out the pressing means, diffusion layer 5 is the plastic material of a high index of refraction, and plastic material is the transparent material of Merlon (PC), PEN or PETG (PET).If when being coated with means, diffusion layer 5 has a transparent resin portion 50 and a plurality of diffusion particulate 51, transparent resin portion 50 is transparent materials such as a UV resin, thermosetting resin or epoxy resin, and diffusion particulate 51 is for being acryl (PMMA), Merlon (PC) or polystyrene transparent materials such as (PS).
See also shown in Figure 12ly, be applied to the decomposing schematic representation of a backlight module for brightness enhancement film 1 of the present invention.This backlight module comprises: a brightness enhancement film 1, a diffuser plate 6, a panel 8, a framework 9 and a reflector 10.Wherein, reflector 10 has an accommodation space 100, and illuminating source 7 is contained in the accommodation space 100 of reflector 10; Diffuser plate 6 is arranged at the illuminating source top; Brightness enhancement film 1 is arranged at diffuser plate 6 tops; Panel 8 is arranged at brightness enhancement film 1 top; This framework 9 matches with reflector 10, and encapsulates this diffuser plate 6, brightness enhancement film 1 and panel 8 together; Thereby this illuminating source 7 can be via this diffuser plate 6, and by this brightness enhancement film 1, forms luminously uniformly in panel 8 surfaces, and presents an evenly luminous effect by the light-emitting window 90 of framework 9.
Comprehensively above-mentioned, the present invention makes brightness enhancement film have following characteristics by the combination between lens pillar structure, hyaline layer and the reflecting layer of brightness enhancement film:
When (1) making opticpath enter the lens pillar structure, can effectively be limited, and then increase light utilization efficiency by the reflecting layer.
(2) by the reflecting layer of brightness enhancement film, effectively improve the optical texture path, and the bigger light correcting of angle is concentrated, increase light utilization efficiency, improve luminosity to be applied to backlight module.
(3) can utilize covering of diffuse layer structure, control light diffusance and bright dipping visual angle size, reach the briliancy and the visual angle size of backlight module.
The above only is the detailed description and the accompanying drawing of one the specific embodiment of the best of the present invention, only feature of the present invention is not limited thereto, be not in order to restriction the present invention, all scopes of the present invention should be as the criterion with following claim, all closing in the embodiment of the spirit variation similar of claim of the present invention with it, all should be contained in the category of the present invention, any person of ordinary skill in the field in the field of the invention, can think easily and variation or modify the claim all can be encompassed in this case.
Claims (10)
1. a brightness enhancement film is characterized in that, comprising:
One hyaline layer, it has two opposite composition surfaces;
One lens pillar structure, it is arranged on the composition surface of this hyaline layer, and this lens pillar structure has an exiting surface; And
One reflecting layer, it is arranged on the composition surface with respect to this lens pillar structure of this hyaline layer, this reflecting layer has the colloid part of a plurality of echo areas and fixing described a plurality of echo areas, wherein this echo area is one to be added with the nontransparent resin of a plurality of reflective particle, the diameter of this reflective particle is between 0.1 μ m～30 μ m, described a plurality of reflective particle is 1/1000～1/2 with the part by weight of the composition interpolation of this nontransparent resin, and this colloid part is one to be added with a plurality of refraction particulates and to link the transparent resin layer of this echo area and this hyaline layer, the diameter of this refraction particulate is between 0.5 μ m～30 μ m, and the part by weight of the composition of described a plurality of refraction particulates and this transparent resin layer is 1/10000～1/2;
Wherein, this exiting surface has a plurality of protuberances, and this colloid part is positioned described a plurality of echo areas on this hyaline layer, and each echo area is exactly corresponding between per two protuberances;
Wherein, form an optical path between per two echo areas, and this optical path is exactly corresponding to the protuberance of this exiting surface.
2. brightness enhancement film as claimed in claim 1, it is characterized in that: this hyaline layer is a hyaline membrane, this hyaline membrane is the transparent material of a PETG, Merlon, acryl or Triafol T, and thickness is between 0.001～0.5mm.
3. brightness enhancement film as claimed in claim 1, it is characterized in that: comprise further that also an adequate relief is formed in the diffusion layer of the exiting surface of this lens pillar structure, this diffusion layer has a transparent resin portion and a plurality of diffusion particulate, this transparent resin portion is the transparent material of a UV resin, thermosetting resin or epoxy resin, the transparent material that described a plurality of diffusion particulates are an acryl, Merlon or polystyrene; The diameter of this diffusion particulate is 0.5 μ m～30 μ m, and the part by weight of the composition of described a plurality of diffusion particulate and this transparent resin portion is 1/10000～1/2.
4. the backlight module with brightness enhancement film as claimed in claim 1 is characterized in that, comprising:
One reflector, a ccontaining illuminating source;
One diffuser plate is arranged at the top of this illuminating source;
One brightness enhancement film is arranged at the top of this diffuser plate;
One panel is arranged at the top of this blast diffusion barrier; And
One framework matches with this reflector, and encapsulates this diffuser plate, brightness enhancement film and panel together;
Thereby this illuminating source is via this diffuser plate, and by this brightness enhancement film, forms luminous uniformly in panel surface.
5. the preparation method of a brightness enhancement film is characterized in that, comprises the following steps:
(a) provide a hyaline layer, it has two opposite composition surfaces;
(b) provide a lens pillar structure, it has an exiting surface, and this exiting surface is formed with a plurality of protuberances, this lens pillar structure is arranged on the composition surface of this hyaline layer, and with this exiting surface outwardly;
(c) provide a reflecting layer, it has the colloid part of a plurality of echo areas and fixing described a plurality of echo areas, wherein this echo area is one to be added with the nontransparent resin of a plurality of reflective particle, the diameter of this reflective particle is between 0.1 μ m～30 μ m, described a plurality of reflective particle is 1/1000～1/2 with the part by weight of the composition interpolation of this nontransparent resin, and this colloid part is one to be added with a plurality of refraction particulates and to link the transparent resin layer of this echo area and this hyaline layer, the diameter of this refraction particulate is between 0.5 μ m～30 μ m, and the part by weight of the composition of described a plurality of refraction particulates and this transparent resin layer is 1/10000～1/2;
(d) this colloid part is arranged at this hyaline layer and relatively on the composition surface of this lens pillar structure, and each echo area is accurately corresponding between per two protuberances; And
(e) form an optical path between per two reflector spaces, wherein this optical path is exactly corresponding to the protuberance of this lens pillar structure.
6. the preparation method of brightness enhancement film as claimed in claim 5, it is characterized in that: by with this optical path accurately behind the protuberance corresponding to this lens pillar structure, by pressing means, this reflecting layer and lens pillar structure are pressed on these two composition surfaces respectively.
7. the preparation method of brightness enhancement film as claimed in claim 5, it is characterized in that: by with this optical path accurately behind the protuberance corresponding to this lens pillar structure, by coating means, this reflecting layer is coated with is located on this composition surface, and this lens pillar structure is fitted on another composition surface.
8. the preparation method of brightness enhancement film as claimed in claim 5 is characterized in that, and is further comprising the steps of: a diffusion layer (f) is set on the exiting surface of this lens pillar structure, and this diffusion layer is covering equably in each protuberance surface.
9. the preparation method of brightness enhancement film as claimed in claim 8 is characterized in that: by pressing means, this diffusion layer is pressed on the exiting surface of this lens pillar structure, and is pressed together on each protuberance surface equably.
10. the preparation method of brightness enhancement film as claimed in claim 8 is characterized in that: by coating means, this diffusion layer is coated with on the exiting surface of being located at this lens pillar structure, and is attached to each protuberance surface equably; In these coating means, this diffusion layer has a transparent resin portion and a plurality of diffusion particulate, this transparent resin portion is the transparent material of a UV resin, thermosetting resin or epoxy resin, the transparent material that described a plurality of diffusion particulate is an acryl, Merlon or polystyrene, the diameter of this diffusion particulate is 0.5 μ m～30 μ m, and the part by weight of the composition of described a plurality of diffusion particulate and this transparent resin portion is 1/10000～1/2.
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| CN102620235A (en) * | 2011-12-20 | 2012-08-01 | 友达光电股份有限公司 | Light extraction film and light emitting element using the same |
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| CN106680914A (en) * | 2015-11-06 | 2017-05-17 | 宁波长阳科技股份有限公司 | Composite brightness enhancement film and manufacturing method thereof |
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