CN103149610B - A kind of MULTILAYER COMPOSITE prismatic lens and preparation method thereof - Google Patents

A kind of MULTILAYER COMPOSITE prismatic lens and preparation method thereof Download PDF

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CN103149610B
CN103149610B CN201310058308.7A CN201310058308A CN103149610B CN 103149610 B CN103149610 B CN 103149610B CN 201310058308 A CN201310058308 A CN 201310058308A CN 103149610 B CN103149610 B CN 103149610B
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prismatic lens
prism
adhesive layer
micro
base
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CN201310058308.7A
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Chinese (zh)
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CN103149610A (en
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张彦
崔钧
徐良霞
马子盈
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宁波江北激智科技股份有限公司
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Abstract

The present invention relates to optical film technology field, particularly relate to a kind of MULTILAYER COMPOSITE prismatic lens for backlight module and preparation method thereof.Mutually moving to solve between each diaphragm of existing backlight module, rubbing, cause the damage of diaphragm, or be mixed into dust between diaphragm and cut the chip of generation, make the defect that backlight module qualification rate reduces, and alleviate the interference of prismatic lens.The invention provides a kind of MULTILAYER COMPOSITE prismatic lens and preparation method thereof, this composite prism sheet comprises lower prismatic lens, adhesive layer, upper prismatic lens successively; Described upper prismatic lens and lower prismatic lens comprise prismatic lens base material, and described prismatic lens base material is provided with micro-prism structure; Described upper prismatic lens and lower prismatic lens are combined with each other by adhesive layer, and the direction of upper and lower prismatic lens rib is perpendicular.MULTILAYER COMPOSITE prismatic lens provided by the invention has excellent optical effect, can improve the yield of backlight module simultaneously, and reduces the operation of assembling cleaning.Its preparation method technique is simple, is easy to operation.

Description

A kind of MULTILAYER COMPOSITE prismatic lens and preparation method thereof
Technical field
The present invention relates to optical film technology field, particularly relate to a kind of MULTILAYER COMPOSITE prismatic lens for backlight module and preparation method thereof.
Background technology
Because liquid crystal display itself can not be luminous, backlight module, as one of the key component of liquid crystal display, just serves the effect providing uniform area source.Backlight module is made up of lamp source, reflector plate, light guide plate, lower diffusion barrier, prismatic lens, upper diffusion barrier.Lamp source sends line source, becomes area source through reflector plate, light guide plate, lower diffusion barrier, then concentrates light further through prismatic lens, improves brightness.The effect of upper diffusion barrier is mainly protected prismatic lens and improves angle of visibility.
The prismatic lens of monolithic can improve brightness 60%, and the superposition of two panels prismatic lens can improve brightness about 120%.Thus, can find out that prismatic lens is in raising brightness, effect during economize energy.But, when prismatic lens surface structure sustains damage, can greatly reduce its optical effect.When carrying out backlight assembling, mutual movement, friction can be there is between diaphragm, causing the damage of diaphragm, simultaneously also likely be mixed into dust between film and film and cut the chip of generation, backlight module yield (or claiming qualification rate) is reduced.Meanwhile, prismatic lens easily produces interference, affects optical effect.
Summary of the invention
Mutually moving to solve between each diaphragm of existing backlight module, rubbing, cause the damage of diaphragm, or be mixed into dust between diaphragm and cut the chip of generation, make the defect that backlight module qualification rate reduces, and reduce the interference of prismatic lens.The invention provides a kind of MULTILAYER COMPOSITE prismatic lens and preparation method thereof, described composite prism sheet is by the blooming of two prismatic lens superimposions, described composite prism sheet has excellent optical effect, can improve the yield of backlight module simultaneously, and reduces the operation of assembling cleaning.
In order to solve the problems of the technologies described above, the present invention adopts following technical proposals:
The invention provides a kind of MULTILAYER COMPOSITE prismatic lens, described composite prism sheet comprises lower prismatic lens, adhesive layer, upper prismatic lens successively; Described upper prismatic lens and lower prismatic lens comprise prismatic lens base material (being called prismatic lens base material and lower prismatic lens base material), described prismatic lens base material are provided with micro-prism structure (abbreviation rib); Described upper prismatic lens and lower prismatic lens are combined with each other by adhesive layer, and the direction of upper and lower prismatic lens rib is perpendicular.That is, the direction, length place of the micro-prism structure (rib) of upper and lower prismatic lens is perpendicular.Such as: the micro-prism structure of upper prismatic lens is laterally placed, and lower prismatic lens micro-prism structure is longitudinally placed.The lower surface of described upper prismatic lens base material is combined with each other by the micro-prism structure of adhesive layer and lower prismatic lens.
The direction of upper and lower prismatic lens rib is perpendicular, can avoid producing interference.The material of described adhesive layer is adhesive.Described adhesive is selected from the combination of a kind of in epoxy resin, acryl resin, polyurethane, polyvinyl acetate (PVA), urea-formaldehyde resin adhesive or at least two kinds.The refractive index of above-mentioned adhesive is 1-1.5.
Further, the height of described micro-prism structure is 10-70 μm, and corner angle are 1 °-160 °.
Further, the thickness of described upper prismatic lens base material and lower prismatic lens base material is respectively 10-300 μm.
The micro-prism structure of above-mentioned upper prismatic lens and lower prismatic lens and the thickness of prismatic lens base material, can identical also can not be identical.
Preferably 30 °-150 °, the corner angle of described micro-prism structure, the thickness of described upper prismatic lens base material and lower prismatic lens base material can also be 30-200 μm, 50-100 μm or 150-250 μm.Described micro-prism structure is made up of UV glue (ultraviolet cured adhesive), and the principal ingredient of described UV glue is acryl resin.The material of described prismatic lens base material is selected from PET(polyethylene terephthalate), glass, PC(polycarbonate), PA(polyamide), PS(polystyrene), PE(tygon), PMMA(polymethylmethacrylate) etc. the one in optical-grade transparent film.
Further, the thickness of described adhesive layer is 0.5-35 μm, is the 5/100-50/100 of the height of the highest rib in lower prismatic lens surface.On the basis ensureing optical effect, described adhesive layer gets over Bao Yuehao.
Further, the thickness of adhesive layer is the 10/100-30/100 of the highest rib height in lower prismatic lens surface.
The thickness of described adhesive layer is preferably 20/100 or 40/100 of the height of the highest rib in lower prismatic lens surface.The thickness controlling adhesive layer is in certain scope, and can make to interfere between upper and lower prismatic lens to diminish, brightness improves, and effectively improves the qualification rate cut.
Further, the height of described micro-prism structure is 10-70 μm, corner angle are 1 °-160 °, and the thickness of described upper prismatic lens base material and lower prismatic lens base material is respectively 10-300 μm, and the thickness of described adhesive layer is the 5/100-50/100 of the height of the highest rib in lower prismatic lens surface.
Preferably, the thickness of described upper prismatic lens base material is 75-100 μm, and the height of described upper prismatic lens surface rib is 30-40 μm, and corner angle are 120 °-130 °; The thickness of described lower prismatic lens base material is 75-100 μm, and the height of described lower prismatic lens surface rib is 15-25 μm, and corner angle are 20 °-30 °; The thickness of described adhesive layer is 2-6 μm.
Further, the height of described micro-prism structure is 10-70 μm, corner angle are 30 °-150 °, and the thickness of described upper prismatic lens base material and lower prismatic lens base material is respectively 30-200 μm, and the thickness of described adhesive layer is the 10/100-30/100 of the height of the highest rib in lower prismatic lens surface.
Further, the height of described micro-prism structure is 20-50 μm, corner angle are 30 °-150 °, and the thickness of described upper prismatic lens base material and lower prismatic lens base material is respectively 150-250 μm, and the thickness of described adhesive layer is the 10/100-30/100 of the height of the highest rib in lower prismatic lens surface.
Further, the height of described micro-prism structure is 10-70 μm, and corner angle are 30 °-150 °, and the thickness of described upper prismatic lens base material is respectively 50-100 μm, the thickness of described lower prismatic lens base material is respectively 100-200 μm, and the thickness of described adhesive layer is 1-21 μm.
The present invention also provides a kind of preparation method of above-mentioned MULTILAYER COMPOSITE prismatic lens, and described preparation method comprises the steps:
(1) the lower prismatic lens of preparation and upper prismatic lens;
(2) be coated with one deck adhesive at upper prism lower surface, in an oven aging 1-30min, then use prismatic lens under composite roll compound, finished product rolling, aging 3-40h in 50 DEG C of drying rooms.
Compared with the optical effect superposed with existing common prismatic lens, MULTILAYER COMPOSITE prismatic lens provided by the invention has higher brightness equally, the interference produced when simultaneously decreasing prismatic lens superposition, MULTILAYER COMPOSITE prismatic lens provided by the invention decreases operations such as cutting cleaning assembling, and be not easily mixed into dust between film and film, improve and cut yield, and make backlight module have higher yield.Preparation method's technique of above-mentioned MULTILAYER COMPOSITE prismatic lens is simple, is easy to operation.
Accompanying drawing explanation
Fig. 1 is the diagrammatic cross-section of existing backlight module;
Fig. 2 is the diagrammatic cross-section of MULTILAYER COMPOSITE prismatic lens provided by the invention.
Wherein, to be reflector plates, 103 be light guide plate, 104 that 101 refer to lamp sources, 102 is lower diffusion barrier, 105 be lower prismatic lens, 106 be upper prismatic lens, 107 is upper diffusion barrier, 201 is lower prismatic lens, 2011 is the micro-prism structure on lower prismatic lens surface, and 203 is upper prismatic lens, and 202 is adhesive.
Embodiment
As shown in Figure 1, existing backlight module comprises lamp source 101, reflector plate 102, light guide plate 103, lower diffusion barrier 104, lower prismatic lens 105, upper prismatic lens 106 and upper diffusion barrier 107.
As shown in Figure 2, MULTILAYER COMPOSITE prismatic lens provided by the invention comprises lower prismatic lens 201, adhesive layer 202, upper prismatic lens 203 successively; Described upper prismatic lens 203 and lower prismatic lens 201 comprise prismatic lens base material, and described lower prismatic lens base material is provided with micro-prism structure 2011, and described upper prismatic lens base material is provided with micro-prism structure; The micro-prism structure of upper and lower prismatic lens can identical also can be different, compound tense, upper and lower prismatic lens is placed according to rib mutually perpendicular direction.
The preparation method of MULTILAYER COMPOSITE prismatic lens provided by the invention, comprises the steps:
(1) the lower prismatic lens of preparation and upper prismatic lens;
(2) be coated with one deck adhesive at the prismatic lens base material lower surface of upper prismatic lens, aging 1-30min in an oven, form adhesive layer; Use prismatic lens under composite roll compound again, make together with the lower surface of prismatic lens base material to be compound to the micro-prism structure of lower prismatic lens by adhesive layer; Finished product rolling, continues aging 3-40h in 50 DEG C of drying rooms.
Upper prismatic lens in above-mentioned steps (1) and lower prismatic lens can be off-the-shelfs commercially, also can prepare according to prior art.
Test the brightness of gained MULTILAYER COMPOSITE prismatic lens by the following method:
Luminance test: film to be measured is put into 24 cun of backlight modules, light module with the voltage of 24V, by briliancy instrument (model BM-7) test brightness.
Embodiment 1
Material: upper prismatic lens and lower prismatic lens are the models that South Korea's LG Electronics Inc produces is the prismatic lens of SOS.
Preparation method is as follows: at the lower surface coating adhesive for polyurethane of upper prismatic lens, form the adhesive layer that a layer thickness is 2 μm, the height of the micro-prism structure of lower prismatic lens is 15 μm, upper surface (micro-prism structure layer) compound of described adhesive layer and lower prismatic lens, obtains MULTILAYER COMPOSITE prismatic lens of the present invention.
Embodiment 2
Material: lower prismatic lens be Taiwan shine joint-stock company produce model be the prismatic lens of KL77.
Upper prismatic lens is the model that South Korea's LG Electronics Inc produces is the prismatic lens of SOS.
Preparation method is as follows: upper prismatic lens lower surface apply one deck adhesive for polyurethane, form 6 μm of thick adhesive layer, the height of the micro-prism structure of lower prismatic lens is 25 μm, upper surface (micro-prism structure layer) compound of described adhesive layer and lower prismatic lens, obtains MULTILAYER COMPOSITE prismatic lens of the present invention.
Embodiment 3
Material: lower prismatic lens be Taiwan shine joint-stock company produce model be the prismatic lens of KL77.
Upper prismatic lens is the model that South Korea's LG Electronics Inc produces is the prismatic lens of SOS.
Preparation method is as follows: upper prismatic lens lower surface apply one deck adhesive for polyurethane, form 3 μm of thick adhesive layer, the height of the micro-prism structure of lower prismatic lens is 25 μm, upper surface (micro-prism structure layer) compound of described adhesive layer and lower prismatic lens, obtains MULTILAYER COMPOSITE prismatic lens of the present invention.
Embodiment 4
Prepare MULTILAYER COMPOSITE prismatic lens according to the method described above, described composite prism sheet comprises lower prismatic lens, adhesive layer, upper prismatic lens successively; Described upper prismatic lens and lower prismatic lens comprise prismatic lens base material, and described prismatic lens base material is provided with micro-prism structure; Described upper prismatic lens and lower prismatic lens are combined with each other by adhesive layer, and the direction of upper and lower prismatic lens rib is perpendicular.
Wherein, the height of described micro-prism structure is 10 μm, and corner angle are 1 °-160 °, and the thickness of described upper prismatic lens base material and lower prismatic lens base material is respectively 10 μm, and the thickness of described adhesive layer is 0.5 μm, be lower prismatic lens surface rib high 5/100.
Embodiment 5
Prepare MULTILAYER COMPOSITE prismatic lens according to the method described above, described composite prism sheet comprises lower prismatic lens, adhesive layer, upper prismatic lens successively; Described upper prismatic lens and lower prismatic lens comprise prismatic lens base material, and described prismatic lens base material is provided with micro-prism structure; Described upper prismatic lens and lower prismatic lens are combined with each other by adhesive layer, and the direction of upper and lower prismatic lens rib is perpendicular.
Wherein, the height of described micro-prism structure is 70 μm, and corner angle are 1 °-160 °, and the thickness of described upper prismatic lens base material and lower prismatic lens base material is respectively 300 μm, and the thickness of described adhesive layer is 35 μm, be lower prismatic lens surface rib high 50/100.
Embodiment 6
Prepare MULTILAYER COMPOSITE prismatic lens according to the method described above, described composite prism sheet comprises lower prismatic lens, adhesive layer, upper prismatic lens successively; Described upper prismatic lens and lower prismatic lens comprise prismatic lens base material, and described prismatic lens base material is provided with micro-prism structure; Described upper prismatic lens and lower prismatic lens are combined with each other by adhesive layer, and the direction of upper and lower prismatic lens rib is perpendicular.
Wherein, the height of described micro-prism structure is 40 μm, and corner angle are 1 °-160 °, and the thickness of described upper prismatic lens base material and lower prismatic lens base material is respectively 200 μm, and the thickness of described adhesive layer is 16 μm, be lower prismatic lens surface rib high 40/100.
Embodiment 7
Prepare MULTILAYER COMPOSITE prismatic lens according to the method described above, described composite prism sheet comprises lower prismatic lens, adhesive layer, upper prismatic lens successively; Described upper prismatic lens and lower prismatic lens comprise prismatic lens base material, and described prismatic lens base material is provided with micro-prism structure; Described upper prismatic lens and lower prismatic lens are combined with each other by adhesive layer, and the direction of upper and lower prismatic lens rib is perpendicular.
The height of described micro-prism structure is 10 μm, and corner angle are 30 °-150 °, and the thickness of described upper prismatic lens base material and lower prismatic lens base material is respectively 30 μm, and the thickness of described adhesive layer is 1 μm, be lower prismatic lens surface rib high 10/100.
Embodiment 8
Prepare MULTILAYER COMPOSITE prismatic lens according to the method described above, described composite prism sheet comprises lower prismatic lens, adhesive layer, upper prismatic lens successively; Described upper prismatic lens and lower prismatic lens comprise prismatic lens base material, and described prismatic lens base material is provided with micro-prism structure; Described upper prismatic lens and lower prismatic lens are combined with each other by adhesive layer, and the direction of upper and lower prismatic lens rib is perpendicular.
The height of described micro-prism structure is 10-70 μm, and corner angle are 30 °-150 °, and the thickness of described upper prismatic lens base material and lower prismatic lens base material is respectively 200 μm, and the thickness of described adhesive layer is 21 μm, is 30/100 of the height of the highest rib in lower prismatic lens surface.
Embodiment 9
Prepare MULTILAYER COMPOSITE prismatic lens according to the method described above, described composite prism sheet comprises lower prismatic lens, adhesive layer, upper prismatic lens successively; Described upper prismatic lens and lower prismatic lens comprise prismatic lens base material, and described prismatic lens base material is provided with micro-prism structure; Described upper prismatic lens and lower prismatic lens are combined with each other by adhesive layer, and the direction of upper and lower prismatic lens rib is perpendicular.
The height of described micro-prism structure is 10-30 μm, and corner angle are 30 °-150 °, and the thickness of described upper prismatic lens base material and lower prismatic lens base material is respectively 100 μm, and the thickness of described adhesive layer is 6 μm, is 20/100 of the height of the highest rib in lower prismatic lens surface.
Embodiment 10
Prepare MULTILAYER COMPOSITE prismatic lens according to the method described above, described composite prism sheet comprises lower prismatic lens, adhesive layer, upper prismatic lens successively; Described upper prismatic lens and lower prismatic lens comprise prismatic lens base material, and described prismatic lens base material is provided with micro-prism structure; Described upper prismatic lens and lower prismatic lens are combined with each other by adhesive layer, and the direction of upper and lower prismatic lens rib is perpendicular.
The height of described micro-prism structure is 20 μm, and corner angle are 30 °-150 °, and the thickness of described upper prismatic lens base material and lower prismatic lens base material is respectively 150 μm, and the thickness of described adhesive layer is 2 μm, is 10/100 of the height of the highest rib in lower prismatic lens surface.
Embodiment 11
Prepare MULTILAYER COMPOSITE prismatic lens according to the method described above, described composite prism sheet comprises lower prismatic lens, adhesive layer, upper prismatic lens successively; Described upper prismatic lens and lower prismatic lens comprise prismatic lens base material, and described prismatic lens base material is provided with micro-prism structure; Described upper prismatic lens and lower prismatic lens are combined with each other by adhesive layer, and the direction of upper and lower prismatic lens rib is perpendicular.
The height of described micro-prism structure is 20-50 μm, and corner angle are 30 °-150 °, and the thickness of described upper prismatic lens base material and lower prismatic lens base material is respectively 250 μm, and the thickness of described adhesive layer is 15 μm, is 30/100 of the height of the highest rib in lower prismatic lens surface.
Embodiment 12
Prepare MULTILAYER COMPOSITE prismatic lens according to the method described above, described composite prism sheet comprises lower prismatic lens, adhesive layer, upper prismatic lens successively; Described upper prismatic lens and lower prismatic lens comprise prismatic lens base material, and described prismatic lens base material is provided with micro-prism structure; Described upper prismatic lens and lower prismatic lens are combined with each other by adhesive layer, and the direction of upper and lower prismatic lens rib is perpendicular.
The height of described micro-prism structure is 20-35 μm, and corner angle are 30 °-150 °, and the thickness of described upper prismatic lens base material and lower prismatic lens base material is respectively 180 μm, and the thickness of described adhesive layer is 7 μm, is 20/100 of the height of the highest rib in lower prismatic lens surface.
Embodiment 13
Prepare MULTILAYER COMPOSITE prismatic lens according to the method described above, described composite prism sheet comprises lower prismatic lens, adhesive layer, upper prismatic lens successively; Described upper prismatic lens and lower prismatic lens comprise prismatic lens base material, and described prismatic lens base material is provided with micro-prism structure; Described upper prismatic lens and lower prismatic lens are combined with each other by adhesive layer, and the direction of upper and lower prismatic lens rib is perpendicular.
The thickness of described upper prismatic lens base material is 50 μm, and the height of described micro-prism structure is 10-70 μm, and corner angle are 90 °-150 °, the thickness of described lower prismatic lens base material is 100 μm, the height of described micro-prism structure is 10 μm, and corner angle are 30 °-150 °, and the thickness of described adhesive layer is 1 μm.The thickness of described adhesive layer is 10/100 of the height of the highest rib in lower prismatic lens surface.
Embodiment 14
Prepare MULTILAYER COMPOSITE prismatic lens according to the method described above, described composite prism sheet comprises lower prismatic lens, adhesive layer, upper prismatic lens successively; Described upper prismatic lens and lower prismatic lens comprise prismatic lens base material, and described prismatic lens base material is provided with micro-prism structure; Described upper prismatic lens and lower prismatic lens are combined with each other by adhesive layer, and the direction of upper and lower prismatic lens rib is perpendicular.
The thickness of described upper prismatic lens base material is 100 μm, the height of described micro-prism structure is 10-70 μm, corner angle are 90 °-150 °, the thickness of described lower prismatic lens base material is 200 μm, the height of described micro-prism structure is 10-70 μm, corner angle are 90 °-150 °, and the thickness of described adhesive layer is 21 μm.The thickness of described adhesive layer is 30/100 of the height of the highest rib in lower prismatic lens surface.
Embodiment 15
Prepare MULTILAYER COMPOSITE prismatic lens according to the method described above, described composite prism sheet comprises lower prismatic lens, adhesive layer, upper prismatic lens successively; Described upper prismatic lens and lower prismatic lens comprise prismatic lens base material, and described prismatic lens base material is provided with micro-prism structure; Described upper prismatic lens and lower prismatic lens are combined with each other by adhesive layer, and the direction of upper and lower prismatic lens rib is perpendicular.
The thickness of described upper prismatic lens base material is 75 μm, the height of described micro-prism structure is 10-70 μm, corner angle are 45 °-135 °, the thickness of described lower prismatic lens base material is 150 μm, the height of described micro-prism structure is 10-50 μm, corner angle are 60 °-120 °, and the thickness of described adhesive layer is 15 μm.The thickness of described adhesive layer is 22/100 of the height of the highest rib in lower prismatic lens surface.
Embodiment 16
Prepare MULTILAYER COMPOSITE prismatic lens according to the method described above, described composite prism sheet comprises lower prismatic lens, adhesive layer, upper prismatic lens successively; Described upper prismatic lens and lower prismatic lens comprise prismatic lens base material, and described prismatic lens base material is provided with micro-prism structure; Described upper prismatic lens and lower prismatic lens are combined with each other by adhesive layer, and the direction of upper and lower prismatic lens rib is perpendicular.
The thickness of described upper prismatic lens base material is 75 μm, and the height of micro-prism structure (surperficial rib) is 30 μm, and corner angle are 120 °-130 °; The thickness of described lower prismatic lens base material is 75 μm, and the height of micro-prism structure (surperficial rib) is 15 μm, and corner angle are 20 °-30 °; The thickness of described adhesive layer is 2 μm.The thickness of described adhesive layer is 30/100 of the height of the highest rib in lower prismatic lens surface.
Embodiment 17
Prepare MULTILAYER COMPOSITE prismatic lens according to the method described above, described composite prism sheet comprises lower prismatic lens, adhesive layer, upper prismatic lens successively; Described upper prismatic lens and lower prismatic lens comprise prismatic lens base material, and described prismatic lens base material is provided with micro-prism structure; Described upper prismatic lens and lower prismatic lens are combined with each other by adhesive layer, and the direction of upper and lower prismatic lens rib is perpendicular.
The thickness of described upper prismatic lens base material is 100 μm, and the height of micro-prism structure (surperficial rib) is 40 μm, and corner angle are 120 °-130 °; The thickness of described lower prismatic lens base material is 100 μm, and the height of micro-prism structure (surperficial rib) is 25 μm, and corner angle are 20 °-30 °; The thickness of described adhesive layer is 6 μm.The thickness of described adhesive layer is 24/100 of the height of the highest rib in lower prismatic lens surface.
Embodiment 18
Prepare MULTILAYER COMPOSITE prismatic lens according to the method described above, described composite prism sheet comprises lower prismatic lens, adhesive layer, upper prismatic lens successively; Described upper prismatic lens and lower prismatic lens comprise prismatic lens base material, and described prismatic lens base material is provided with micro-prism structure; Described upper prismatic lens and lower prismatic lens are combined with each other by adhesive layer, and the direction of upper and lower prismatic lens rib is perpendicular.
The thickness of described upper prismatic lens base material is 90 μm, and the height of micro-prism structure (surperficial rib) is 30-40 μm, and corner angle are 120 °-130 °; The thickness of described lower prismatic lens base material is 90 μm, and the height of micro-prism structure (surperficial rib) is 15-25 μm, and corner angle are 20 °-30 °; The thickness of described adhesive layer is 4-6 μm.The thickness of described adhesive layer is the 16/100-24/100 of the height of the highest rib in lower prismatic lens surface.
Comparative example 1:
The model that 2 South Korea's LG Electronics Incs produce is that the prismatic lens of SOS directly superposes use, and the yield cutting yield and backlight module of gained composite prism sheet is lower.
Comparative example 2:
Material: upper prismatic lens and lower prismatic lens are the models that South Korea's LG Electronics Inc produces is the prismatic lens of SOS.
Preparation method is as follows: apply one deck acrylic acid adhesive at the lower surface of prismatic lens SOS, form 10 μm of thick adhesive layer, the height of the micro-prism structure of lower prismatic lens is 15 μm, the thickness of described adhesive layer is 67/100 of the height of the highest microprism rib, upper surface (micro-prism structure layer) compound of described adhesive layer and lower prismatic lens, obtains MULTILAYER COMPOSITE prismatic lens.The thickness of the adhesive layer of this MULTILAYER COMPOSITE prismatic lens is excessive with the ratio of the height of the highest microprism rib, and the brightness of backlight module is lower.
Comparative example 3:
The model of 1 Korea S's lg electronics production is the prismatic lens of SOS.
Comparative example 4:
Material: upper prismatic lens and lower prismatic lens are the models that South Korea's LG Electronics Inc produces is the prismatic lens of SOS.
Preparation method is as follows: apply one deck acrylic acid adhesive at the lower surface of prismatic lens SOS, form 0.5 μm of thick adhesive layer, the height of the micro-prism structure of lower prismatic lens is 50 μm, the thickness of described adhesive layer is 1/100 of the height of the highest rib of micro-prism structure, upper surface (microprism layer) compound of described adhesive layer and lower prismatic lens, obtains MULTILAYER COMPOSITE prismatic lens.The thickness of the adhesive layer of this MULTILAYER COMPOSITE prismatic lens and the high ratio of maximum microprism rib too small, effectively upper prismatic lens and lower prismatic lens can not be combined with each other, using and cutting in process, upper and lower prismatic lens easily departs from, effectively can not reduce interference effect simultaneously, cause backlight module yield low, reliability (reliability) is bad.
The brightness of the backlight film group cutting yield and assembled by it of table 1 gained MULTILAYER COMPOSITE prismatic lens and yield data
As can be seen from data shown in table 1, the optical effect adopting the optical effect of the backlight module obtained by MULTILAYER COMPOSITE prismatic lens provided by the invention and two prismatic lenses to superpose the backlight module of gained is suitable, simultaneously MULTILAYER COMPOSITE prismatic lens has and higher cuts yield, and interference is also more weak.The optical effect of the backlight module obtained by MULTILAYER COMPOSITE prismatic lens that embodiment 16 to 18 provides is better, and MULTILAYER COMPOSITE prismatic lens has and higher cuts yield simultaneously, and the yield of backlight module is also higher.But, when the adhesive layer thickness of Multi-layer composite prismatic lens is excessive, the micro-prism structure of lower prismatic lens can be covered, affect the spotlight effect of micro-prism structure.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Every equalization done according to content of the present invention changes and modifies, and is all encompassed in the scope of the claims of the present invention.

Claims (1)

1. a MULTILAYER COMPOSITE prismatic lens, is characterized in that, described composite prism sheet comprises lower prismatic lens, adhesive layer, upper prismatic lens successively; Described upper prismatic lens and lower prismatic lens comprise prismatic lens base material, and described prismatic lens base material is provided with micro-prism structure; Described upper prismatic lens and lower prismatic lens are combined with each other by adhesive layer, and the direction of the micro-prism structure of upper and lower prismatic lens is perpendicular;
The thickness of described upper prismatic lens base material is 75-100 μm, and the height of the micro-prism structure on described upper prismatic lens surface is 30-40 μm, and corner angle are 120 °-130 °; The thickness of described lower prismatic lens base material is 75-100 μm, and the height of the micro-prism structure on described lower prismatic lens surface is 15-25 μm, and corner angle are 20 °-30 °; The thickness of described adhesive layer is 2-6 μm;
The preparation method of described MULTILAYER COMPOSITE prismatic lens comprises the steps:
(1) the lower prismatic lens of preparation and upper prismatic lens;
(2) be coated with one deck adhesive at upper prism lower surface, in an oven aging 1-30min, then use prismatic lens under composite roll compound, finished product rolling, aging 3-40h in 50 DEG C of drying rooms.
CN201310058308.7A 2013-02-25 2013-02-25 A kind of MULTILAYER COMPOSITE prismatic lens and preparation method thereof CN103149610B (en)

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CN105891920A (en) * 2016-05-26 2016-08-24 福建正德光电科技有限公司 Columnar diffusion film, prism brightness-enhancement film and prism diffusion film composite diffusion plate
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CN107450115B (en) * 2017-08-21 2021-01-05 东莞市光志光电有限公司 Novel prism composite laminating method
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