CN105891919B - Photopermeability base material - Google Patents

Photopermeability base material Download PDF

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Publication number
CN105891919B
CN105891919B CN201510518413.3A CN201510518413A CN105891919B CN 105891919 B CN105891919 B CN 105891919B CN 201510518413 A CN201510518413 A CN 201510518413A CN 105891919 B CN105891919 B CN 105891919B
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protruding
photopermeability base
plane
photopermeability
base
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CN105891919A (en
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陈信宏
王崇豪
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Chi Mei Corp
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Chi Mei Corp
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Priority to TW104110920 priority
Priority to TW104110920A priority patent/TWI547722B/en
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Abstract

The present invention discloses a kind of photopermeability base material, includes the ontology with a first surface, and on first surface and protrudes from a protruding portion of first surface;Protruding portion has an irregular platform top surface and an inclined-plane, wherein inclined-plane is connected to first surface and irregular platform top surface, it is 5 μm~40 μm that irregular platform top surface to first surface, which has a height, and a longest berm width of irregular platform top surface is in 0.15mm~8mm.The photopermeability base material of the present invention can maintain high briliancy and improve briliancy to spend together when can make using as diffuser plate.

Description

Photopermeability base material
Technical field
The present invention relates to a kind of photopermeability base materials, and more particularly to can be used as a kind of light with protruding portion of diffuser plate Permeability base material.
Background technology
Diffuser plate is a kind of optical sheet applied to electronic product such as display, and main function is to expand the light of light source Atomization is dissipated, makes product screen that the image quality of brightness uniformity be presented.And different electronic products are different for screen image quality demand, therefore expand Fall apart manufacturer's manufacture diffuser plate when, can the diffusion with different light penetrations be produced according to the demand of downstream manufacturers Plate.For being applied to the side direction type backlight module of display (such as liquid crystal display device), generally comprise by translucent material shape At light guide plate, be arranged light guide plate side end light source (such as cold-cathode tube formed linear light source), be located at light guide plate with Optical reflection film and configuration below linear light source form the diffuser plate and/or eyeglass film (lens of light-emitting surface on light guide plate film)。
It mostly can be especially in expansion in recent years in color liquid crystal display arrangement in order to improve briliancy and reduce consumption electric power The upper surface of fall apart or diffuser plate and light guide plate between 1 or 2 surfaces of configuration there are the eyeglass films of prism shape, make from light guide plate The light of injection efficiently optically focused on the positive direction of liquid crystal display panel.Also, caused by order to improve at a distance between light source Luminous quantity it is uneven, also there is technology printing inside light guide plate to be formed and can be become larger with separate light source by light diffusion ink Dot pattern, but diffuser plate is configured to so that light equably spreads and the dot pattern being printed on inside light guide plate is made not seen See as the main purpose.But previous being fabricated to for such eyeglass film is put by the Embossing processing or use of thermoplastic resin plate The methods of the transcription of prism shape of ray hardened type resin is reached.But these existing eyeglass film manufacturing costs are high and are considered as structure At the expensive main cause of backlight module, in addition, existing eyeglass film also makes material select because being limited to its manufacturing method Range is excessively narrow.Furthermore eyeglass film also has must be applied in combination because not having light diffusion effect with optical diffusion film, cause backlight The complicated problem of the assembling steps of module.
In addition, being also possible to a variety of functional films used other than being above set forth in display in diffuser plate as spread Film, eyeglass film, briliancy improve film, aobvious in order to reach to improve the briliancy for showing picture and the luminance nonuniformity for reducing picture entirety Show the purpose of device is lightening and reduces cost, is to be absorbed in develop the optics for integrating multiple functions today there is also many research Plate, for example, integrate diffuser plate light diffusion effect and brightness enhancement film light collecting effect at an optical sheet developmental research.Especially Recently enlargement is proceeded to from small-sized due to display (such as LCD TV), used machine can be reduced by being more desirable to develop Can property film quantity but the optical diffusing plate of briliancy and diffusion can be improved.
Invention content
It is an object of the invention to propose a kind of photopermeability base material (light transmissive plate), it is made to answer When with as diffuser plate, high briliancy can be maintained and improve briliancy together spend (uniformity of luminance).
To achieve the above object, the present invention provides a kind of photopermeability base material, includes the ontology with a first surface (main body), and on first surface and protrude from the protruding portion (protrusion) of first surface.Protruding portion has There are an irregular platform top surface and an inclined-plane, wherein inclined-plane to be connected to first surface and irregular platform top surface.Irregularly It is 5 μm~40 μm that shape platform top surface to first surface, which has a height (Hp), and a longest platform of irregular platform top surface Width (Wm) is in 0.15mm~8mm.
Wherein, photopermeability base material has a thickness between 0.5mm~6mm ranges.
Wherein, a width (Ws) for the upright projection of the inclined-plane on the first surface is at 10 μm~160 μm.
Wherein, an included angle of the inclined-plane and the first surface is ranging between 120 degree~177 degree.
Wherein, the irregular platform top surface refer to the protruding portion towards the ontology thickness direction on the first surface It is projected as irregular.
Wherein, which is made of a translucent resin.
Wherein, it further includes multiple diffusion particles to be scattered among the ontology and the protruding portion, multiple diffusion particle is put down Equal grain size is 0.1 μm~30 μm.
Wherein, the average grain diameter of multiple diffusion particle is 0.5 μm~20 μm.
Wherein, the average grain diameter of multiple diffusion particle is 1 μm~5 μm.
Wherein, have multiple protruding portions on the first surface of the ontology, between adjacent multiple protruding portion Minimum spacing is between 10 μm~1000 μ ms.
Wherein, part of the first surface other than the protruding portion has a surface roughness (Ra) for 0.1 μm hereinafter, should It is 0.5 μm or less that the irregular deck roof face of protruding portion, which has a surface roughness (Ra),.
Wherein, it is 0.01 μm~0.08 that part of the first surface other than the protruding portion, which has a surface roughness (Ra), μm, it is 0.01 μm~0.3 μm that the irregular deck roof face of the protruding portion, which has a surface roughness (Ra),.
Wherein, it is 0.02 μm~0.07 that part of the first surface other than the protruding portion, which has a surface roughness (Ra), μm, it is 0.03 μm~0.25 μm that the irregular deck roof face of the protruding portion, which has a surface roughness (Ra),.
Wherein, which separately has a second surface relative to the first surface, the surface roughness of the second surface (Ra) between 3 μm~30 μ ms.
Wherein, which is incidence surface, which is light-emitting surface.
Wherein, the light transmittance of the photopermeability base material is 50%~70%.
Wherein, which is one of the forming with the protruding portion.
Wherein, the irregular platform top surface of the protruding portion is parallel to the first surface of the ontology.
Wherein, which at the corresponding longest berm width there is opposite the first inclined-plane and the second inclined-plane to connect respectively Connect the first surface and the irregular platform top surface, and first inclined-plane and the second inclined-plane form the with the first surface respectively One angle and the second angle, wherein first angle are different from second angle.
Wherein, which at the corresponding longest berm width there is opposite the first inclined-plane and the second inclined-plane to connect respectively Connect the first surface and the irregular platform top surface, and first inclined-plane and the second inclined-plane form the with the first surface respectively One angle and the second angle, wherein first angle are equal to second angle, between 120 degree~177 degree ranges.
Wherein, which has the minimum land lengths perpendicular to the longest berm width, this is most Chain-wales length is 0.03mm~1.5mm.
Wherein, the area ratio which accounts for the first surface is 35%~70%.
Wherein, the ratio range of the area/perimeter of the protruding portion is 100 μm~180 μm.
To achieve the above object, the present invention also provides a kind of backlight modules, including:One light source;And aforementioned photopermeability Base material, wherein the light source is to be oppositely arranged with the first surface.
Wherein, which is incidence surface.
The backlight module of the present invention, includes the photopermeability base material of an embodiment, and there is high briliancy and high briliancy to spend together.
To achieve the above object, the present invention also provides a kind of displays, including:Backlight module.
The display of the present invention includes the backlight module of the photopermeability base material of one embodiment of tool, has high briliancy and height Briliancy is spent together.
Compared with prior art, photopermeability base material (light transmissive plate) proposed by the present invention, tool The protruding portion (protrusion) for having special designing can maintain high briliancy and improve briliancy when can make using as diffuser plate Spend (uniformity of luminance) together.
Below in conjunction with the drawings and specific embodiments, the present invention will be described in detail, but not as a limitation of the invention.
Description of the drawings
Fig. 1 is the local top view of a photopermeability base material of one embodiment of the invention.
The schematic diagram of one protruding portion of the photopermeability base material of Fig. 2 illustrated embodiments.
Fig. 3 A are painted the schematic diagram locally shot to the photopermeability base material of experimental example 1 with light microscope.
Fig. 3 B are painted the schematic diagram locally shot to the photopermeability base material of experimental example 2 with light microscope.
Fig. 3 C are painted the schematic diagram locally shot to the photopermeability base material of experimental example 5 with light microscope.
Fig. 3 D are painted the schematic diagram locally shot to the photopermeability base material of experimental example 6 with light microscope.
Fig. 3 E are painted the schematic diagram locally shot to the photopermeability base material of experimental example 7 with light microscope.
Fig. 3 F are painted the schematic diagram locally shot to the photopermeability base material of experimental example 8 with light microscope.
Fig. 3 G are painted the schematic diagram locally shot to the photopermeability base material of experimental example 9 with light microscope.
Fig. 3 H are painted the schematic diagram locally shot to the photopermeability base material of experimental example 10 with light microscope.
Fig. 4 be painted comparative example surface is directly measured with a laser confocal instrument and the comparative example part surface that obtains it is coarse It writes music line.
Fig. 5 A be painted with a laser confocal instrument directly measure experimental example 1 photopermeability base material protruding portion surface and take The roughness curve of the platform top surface of the protruding portion obtained.
Fig. 5 B are painted the ontology other than the photopermeability base material protruding portion for directly measuring experimental example 1 with a laser confocal instrument First surface and the roughness curve that obtains.
Fig. 6 A are painted so that a laser confocal instrument directly measures the photopermeability base material protruding portion surface of experimental example 2 and obtains Protruding portion platform top surface roughness curve.
Fig. 6 B are painted directly measures sheet of the photopermeability base material of experimental example 2 other than protruding portion with a laser confocal instrument The first surface of body and the roughness curve obtained.
Fig. 7 is painted the schematic diagram of the backlight module of one embodiment of the invention.
Wherein, reference numeral:
1:Photopermeability base material
10:Ontology
101:The first surface of ontology
102:The second surface of ontology
20:Protruding portion
201:The irregular platform top surface of protruding portion
203:First inclined-plane
204:Second inclined-plane
(180-α1)°:First angle
(180-α2)°:Second angle
Hp:Height of the irregular platform top surface to first surface
Hm:The thickness of ontology
Ws:The upright projection width of the inclined-plane of protruding portion on the first surface
Wm:The longest berm width of the irregular platform top surface of protruding portion
Dm:Perpendicular to the minimum land lengths of longest berm width
d:The minimum spacing of adjacent two protruding portion
700:Backlight module
710:Diffuser plate
720:Light source
722:Substrate
724:Luminescence unit
740:Frame
742:Accommodating space
X,Y,Z:Direction
Specific implementation mode
The embodiment of the present invention proposes a kind of photopermeability base material (light transmissive plate), can be applied to Diffuser plate of one display device as backlight module.The photopermeability base material of embodiment is prominent using being formed by body surfaces Go out portion (protrusion) and its special designing, the light-emitting zone of display device is made to maintain high briliancy and improve briliancy to spend together (uniformity of luminance).Therefore, an expansion with high briliancy and promotion diffusion can be provided according to embodiment It falls apart, reduces functional film quantity used in other tradition, and then reduce cost and make more lightening (special using display It is not the display of big size).When the photopermeability base material of Application Example is as diffuser plate, the main body with protruding portion is enabled Light source of the surface towards backlight module.
State sample implementation is described in detail referring to institute's accompanying drawings.It is noted that structure and content that embodiment is proposed It is used by way of example only, the range to be protected of the present invention is not limited only to those described aspects.Identical or class in embodiment As label indicating same or similar part.It is noted that the present invention not shows all possible embodiment. Can structure be changed and be modified without departing from the spirit and scope of the present invention, to meet needed for practical application.Therefore, not It may also can be applied in other state sample implementations proposed by the present invention.Furthermore schema has simplified clearly illustrates embodiment with profit Content, the dimension scale in schema are not drawn according to actual product equal proportion.Therefore, specification and diagramatic content are only described herein Embodiment is used, rather than is used as the scope of the present invention is limited.
Fig. 1 is the local top view of a photopermeability base material of one embodiment of the invention.The light of Fig. 2 illustrated embodiments penetrates The schematic diagram of one protruding portion of property base material.Referring to Fig. 1 and Fig. 2.The photopermeability base material 1 of embodiment includes an ontology (main body) 10 and protruding portion (protrusion) 20 are located on the first surface 101 of ontology 10 and protrude from first surface 101.Wherein, ontology 10 is one of the forming with protruding portion 20.It is explained by taking single protruding portion 20 as an example, protruding portion 20, e.g. Island, has an irregular platform top surface 201 and an inclined-plane (203,204), and wherein inclined-plane (203,204) are connected to first surface 101 with irregular platform top surface 201.
Wherein, irregular platform top surface 201 refers to:Protruding portion 20 towards ontology 10 thickness direction in first surface 101 On be projected as it is irregular, as shown in Figure 2.In an embodiment, the irregular platform top surface 201 to the first of protruding portion 20 Surface 101 has a height Hp, in the range of ranging from 5 μm~40 μm of height Hp, preferably 10 μm~35 μm.
The thickness of photopermeability base material 1 is that the thickness Hm of ontology 10 adds the height Hp of protruding portion 20, as the application present invention Photopermeability base material 1 as backlight module diffuser plate when, the thickness of photopermeability base material 1 is when being 0.5mm~6mm It is good.Thickness may should not be used in and pursue now in lightening display because thickness is blocked up and preponderance more than 6mm, thick Spend diffusion effect when may influence application when thin because of rigidity deficiency than 0.5mm.In an embodiment, photopermeability base The thickness of material 1 is between 0.6mm~5mm (600 μm~5000 μm) range;In another embodiment, the thickness of photopermeability base material 1 For 0.8mm~3mm.In another embodiment, the thickness of photopermeability base material 1 is 0.8mm~2.5mm.
Since the height Hp of protruding portion 20 is little compared to the thickness Hm of ontology 10, the thickness of photopermeability base material 1 (i.e. body thickness Hm adds the height Hp of protruding portion 20) can be considered the thickness Hm for being approximately or equal to ontology 10.
Please refer to Fig. 2, a width Ws of the upright projection of the inclined-plane (203,204) of protruding portion 20 on first surface 101 In the range of 10 μm~160 μm, preferably 12 μm~150 μm of range.In one embodiment, the inclined-plane of protruding portion 20 (203, 204) in the range of a width Ws of the upright projection on first surface 101 is, for example, 13 μm~40 μm.In another embodiment, One width Ws of upright projection of the inclined-plane (203,204) of protruding portion 20 on first surface 101 is, for example, 90 μm~150 μm In range.In an embodiment, an included angle (180- α 1,180- α 2) model of inclined-plane (203,204) and first surface 101 It encloses between 120 degree~177 degree, between preferably 125 degree~175 degree.
From the micro-structure of existing diffuser plate very unlike, embodiment be the protruding portion 20 with large-size.One implements In example, a longest berm width Wm of the irregular platform top surface 201 of protruding portion 20 is in 0.15mm~8mm (150 μm~8000 μm) in the range of.In another embodiment, the longest berm width Wm of the irregular platform top surface 201 of protruding portion 20 is 0.175mm~7mm.In still another embodiment, the longest berm width Wm of the irregular platform top surface 201 of protruding portion 20 is 0.2mm~6mm.
In one embodiment, irregular deck roof face has the minimum land lengths Dm perpendicular to longest berm width, In the range of 0.03mm~1.5mm.
Furthermore in an embodiment, the first surface 101 (the first surface part i.e. other than protruding portion 20) of ontology 10 has One surface roughness (Ra) is 0.1 μm or less preferably 0.085 μm hereinafter, being, for example, in the range of 0.01 μm~0.08 μm.. In one embodiment, the platform top surface 201 of protruding portion 20 have a surface roughness (Ra) be 0.5 μm hereinafter, preferably 0.3 μm with Under, e.g. in the range of 0.01 μm~0.3 μm.In one embodiment, the first surface 101 of ontology 10 is other than protruding portion 20 First surface part have a surface roughness (Ra) be 0.02 μm~0.07 μm, the platform top surface 201 of protruding portion 20 has One surface roughness (Ra) is 0.03 μm~0.25 μm.The ontology 10 of photopermeability base material 1 is opposite with more a second surface 102 In first surface 101.In an embodiment, the surface roughness (Ra) of the second surface 102 of ontology 10 is 3 μm~30 μ ms Between.In another embodiment, the surface roughness (Ra) of the second surface 102 of ontology 10 is between 4 μm~25 μ ms.Surface Roughness Ra may be used 3D shape microscopical detectors and measure.
Below coordinate Fig. 1 and Fig. 2, to the present invention a wherein embodiment be described further, but the present invention not as Limitation.
As shown in Figure 1, there is photopermeability base material 1 multiple protruding portion 20 to be located on the first surface 101 of ontology 10 and dash forward For first surface 101, minimum spacing (i.e. the distance between protruding portion 20 and protruding portion 20) d of adjacent two protruding portion 20 is Between the range of 0.01mm~1mm (10 μm~1000 μm), preferably 0.015mm~0.95mm (15 μm~950 μm).
As shown in Fig. 2, in an embodiment, single protruding portion 20 in addition to include the first surface 101 far from ontology 10 not Regular shape platform top surface 201 has opposite the first inclined-plane 203 and the second inclined-plane 204 at corresponding longest berm width Wm.The One inclined-plane 203 and the second inclined-plane 204 are separately connected first surface 101 and irregular platform top surface 201.Multiple protruding portion 20 Irregular 201 shape of platform top surface can be the same or different from each other.And first inclined-plane 203 and the second inclined-plane 204 difference The first angle (180- α 1) ° and the second angle (180- α 2) ° are formed with first surface 101.In one embodiment, protruding portion 20 First angle (180- α 1) ° is different from the second angle (180- α 2) °, i.e. 1 ≠ α of α 2.In another embodiment, the of protruding portion 20 One angle (180- α 1) ° is equal to the second angle (180- α 2) °, i.e. α 1=α 2.
However, the present invention is to this and is seldom restricted, inclined-plane and the first surface 101 of the different location of each protruding portion 20 Angle can be the same or different;And the bevel angle of difference protruding portion 20 can be the same or different, and visually actually answer The demand of used time and slightly vary and adjust.In an embodiment, the first angle (180- α 1) ° and the second angle (180- α 2) ° it is between 120 degree~177 degree ranges respectively.In another embodiment, the inclined-plane of the different location of single protruding portion 20 is opposite In first surface 101 angle be, for example, between 120 degree~177 degree ranges.In addition, in an embodiment, protruding portion 20 is not First surface 101 of the regular shape platform top surface 201 substantially parallel to ontology 10.
In embodiment, photopermeability base material 1 is made by translucent material, is e.g. made of a translucent resin. Workable translucent resin such as makrolon (polycarbonate), polystyrene (PS), polymethyl methacrylate (PMMA), copolymer of methyl methacrylatestyrene (MS copolymers), acrylonitritrile-styrene resin (AS copolymers), Cyclic polyolefin (cyclo-olefin copolymer), polyolefin copolymer (such as poly- 4-methyl-1-pentene), poly- pair Polyethylene terephthalate (polyethylene terephthalate), polyester, polyethylene, polypropylene, polyvinyl chloride, ionic bond Polymer (ionomer) etc..Wherein, and with makrolon, polystyrene, polymethyl methacrylate, methyl methacrylate Ester-styrol copolymer is preferred.
In embodiment, photopermeability base material 1 can further include the multiple diffusion particles of addition to be scattered in the ontology and the protrusion Among portion, if transparent particle as light diffusing agent to use.
In embodiment, transparent diffusion particle is for example using fine glass particle as the inorganic fine particles of representative, polystyrene tree The organic particle of fat, (methyl) acrylic resin, silicones etc., and it is preferable with organic particle.Organic particle is again with The organic particle of bridge formation more preferably, at least build bridge in its manufacturing process, then in the process of translucent resin by part It will not be deformed, and particulate state can be maintained.Even if that is, will not also be melted with the forming temperature for being heated to translucent resin Particulate in translucent resin is preferable, and the organic fine particles of (methyl) acrylic resin, silicones more preferably built bridge Son.In one embodiment, particularly suitable transparent particle (diffusion particle) for example has, and is with the methyl methacrylate that part is built bridge The polymer of the shell of kernel/poly- (methyl methacrylate) of the polymeric microsphere poly- (butyl acrylate) of matrix has Include polymer (the Rhom and Hass Rohm and of kernel/shell kenel of the kernel and shell of rubbery ethylene polymer Hass Campany systems, trade name Paraloid EXL-5136), the silicones (Toshiba with bridge formation siloxy group Silicone (stock) corporation, trade name Tospearl 120).
In one embodiment, the average grain diameter of diffusion particle is 0.1 μm~30 μm.In another embodiment, light transmission is made an addition to Property base material 1 in diffusion particle, average grain diameter be 0.5 μm~20 μm.In another embodiment, photopermeability base material 1 is made an addition to In diffusion particle, average grain diameter be 1 μm~5 μm.The average grain diameter of diffusion particle is with not 10/ protruding portion 20 of prominent ontology Surface is preferred.Furthermore in an embodiment, the light transmittance of photopermeability base material 1 is 50%~70%, preferably 55%~65%.
In addition, the weight average measured with particle counting as the average grain diameter of those transparent particles of diffusion particle Grain size, and using the population particle size distribution analysis device MODEL Zm of section of Co., Ltd. day machine as analyzer.Weight average The photism that cannot get sufficient light diffusing and light-emitting surface when grain size is less than 0.1 μm is bad, cannot also be filled when more than 30 μm Point light diffusing and light-emitting surface photism it is bad, have in order to obtain sufficient light diffusion effect make coordinate quantitative change it is more, lead The disadvantage for causing photopermeability impaired.
In addition, translucent resin of the usage amount based on 100 parts by weight of transparent particle is 0.1~20 parts by weight, and it is special It is not suitably for 0.5~12 parts by weight.The usage amount of transparent particle will produce light diffusing deficiency when being less than 0.1 parts by weight, i.e., The problem of can penetrating and seeing light source.On the other hand, it is saturating light to be reduced when the usage amount of transparent particle is more than 20 parts by weight Rate is crossed, and briliancy is deteriorated.
In one embodiment, photopermeability base material 1 can be used polystyrene (PS) (such as:Taiwan very U.S. GPPS PG-383D) Translucent resin and to add transparent particle (such as above-mentioned diffusion particle), arbitrary method or device can be used to combine this Single layer is adopted to make and form base material 1 (i.e. light diffusing sheets).In embodiment, e.g. it is configured to make a reservation for using extrusion by melting The platy structure of thickness.When with melt extruded, preferably squeezed after the melting zone of extruder is decompressed to 1.33~66.5kPa.If When the melting zone of extruder does not depressurize, transparent particle joined together and especially not melting property acrylic acid series polymeric compounds particulate meeting It is influenced by oxygen, and particle surface part may be caused, which to crumble, enables light diffusing to reduce.Also, in addition to this, previous week The method known is also available, such as the modes such as injection molding, injection compression molding, blow molding, compression molding, powder forming are all It can complete the forming of photopermeability base material 1.
In addition, in addition to lamina makes, photopermeability base material 1 of the invention also can be multi-layer board, such as in addition to above-mentioned Photosensitive resin layer may also include a coating.In one embodiment, the thickness of coating is 0.01mm~0.5mm or 0.02mm ~0.4mm or 0.03~0.3mm.If the thickness of coating is more than 0.5mm, might have because backlight module unit thickness increases The problem of being unable to fully greatly reach the requirement of liquid crystal display device slimming.Furthermore this coating is for example with can fully send out The high transparency of lens effect is waved, workable resin is acrylic resin, such as polymethyl methacrylate, metering system Sour methyl esters-styrene, acrylonitrile-styrene etc..Wherein, and with polymethyl methacrylate, methyl methacrylate-benzene Ethylene is preferable.
In addition, more may include the addition of ultra-violet absorber in the composition of photopermeability base material 1, to improve photopermeability The weatherability of base material 1 and block harmful ultraviolet light;And/or more may include the addition of fluorescer, fluorescer has absorbable light The ultraviolet light portion energy of line, and by the effect of the power radiation to visible section.
In photopermeability base material 1 is a multiple-plate embodiment, 100 weight of acrylic resin of above-mentioned coating is formed It measures in part, containing 0.5~15 parts by weight of ultra-violet absorber, and the transparent of 0.1 μm~30 μm of average grain diameter can be added according to need 0.001~0.1 parts by weight of 0.1~20 parts by weight of particulate and fluorescer.Wherein institute in transparent particle diffuser plate as above It states, and the usage amount of transparent particle is preferable with 0.5~12 parts by weight.
In one embodiment, ultra-violet absorber is for example:The benzophenone of 2,2 '-dihydroxy -4- methoxy benzophenones Be ultra-violet absorber, 2- (4,6- diphenyl -1,3,5-triazines -2- substituent groups) -5- hexyl hydroxyl phenols three Piperazine system ultra-violet absorber, 2- (2H- benzotriazole -2- substituent groups) -4- methylphenols, 2- (2H- benzotriazole - 2- substituent groups) -4- thirds octyl phenol, 2- (2H- benzotriazole -2- substituent groups) bis- (1- methyl-of -4,6- 1- phenethyls) phenol, 2- (2H- benzotriazole -2- substituent groups) -4,6- be bis--third amyl phenol, 2- (5- chlorine Base -2H- benzotriazole -2- substituent groups) -4- methyl -6- thirds butylphenol, 2- (5- chloro -2H- benzos Triazole -2- substituent groups) -2,4- thirds butylphenol and 2, the (6- (2H- benzotriazole -2- substitutions of 2 '-di-2-ethylhexylphosphine oxides Base) -4- (1,1,3,3- tetramethyl butyl) phenol) etc. enumerate BTA system ultra-violet absorber.
In one embodiment, preferable ultra-violet absorber is for example:2- (2- hydroxy-5-methyls phenyl) benzotriazole, 2- (the pungent phenyl of 2- hydroxyl -5- thirds) benzotriazole, 2- (2- hydroxyls -3,5- diisopropylbenzene (DIPB)) phenyl benzotriazole, 2- (2- hydroxyl -3- third butyl -5- tolyls) -5- chloros benzotriazole, 2,2 '-di-2-ethylhexylphosphine oxide (4- (1,1,3,3 Tetramethyl butyl) -6- (2H- benzotriazole -2- substituent groups) phenol), ((3,4,5,6- tetrahydrochysenes are adjacent by 2- hydroxyls -3- by 2- Benzene imidodicarbonic diamide methyl) -5- tolyls) benzotriazole.Wherein, with 2- (the pungent phenyl of 2- hydroxyl -5- thirds) benzo three Azoles (Ciba-Geigy corporations, trade name Tinuvin 329), 2,2 '-di-2-ethylhexylphosphine oxides (4- (1,1,3,3- tetramethyl fourths Base) -6- (2H- benzotriazole -2- substituent groups) phenol) it is preferred.
Furthermore when using ultra-violet absorber in embodiment, can individually select a kind of ingredient or merge using 2 kinds of ingredients with On, and relative to 100 parts by weight of acrylic resin to use 0.5~15 parts by weight to be preferred, and more preferably with 1~10 parts by weight. When usage amount be less than 0.5 parts by weight when, then weatherability it is bad and make form and aspect variation greatly, when usage amount more than 15 parts by weight when, Then tone and briliancy are all deteriorated.
In addition, the fluorescer used in embodiment (has the ultraviolet light portion energy of absorbable light, and the energy is put It is incident upon the effect of visible section) it is in the range of not undermining resistance to optical activity, improving the tone of synthetic resin etc. at white Or blue and white, such as talan system, benzimidazole system, benzoxazoles system, phthalimide system, rose-red system, cumarin System, oxazole based compound etc..In one embodiment, the usage amount of fluorescer is, for example, relative to 100 parts by weight of acrylic resin 0.001~0.1 parts by weight range, and it is preferable with the range of 0.002~0.08 parts by weight.Coordinate by aforementioned range Fluorescer can make light-emitting surface obtain the effect of sufficient photism and tone improvement.
<Xiang Guanshiyan >
Several groups of related experiments and its data are listed below to make the explanation of embodiment.The structure of photopermeability base material 1 Please refer to the above and Fig. 1, Fig. 2.In an experiment, to propose several groups of samples, and the specification of each sample is as follows:
Comparative example:That is an Existing commercial diffuser plate DS601A (strange U.S.'s industry), there is no any as implemented for diffuser surface The protruding portion of the island of example is formed.
The photopermeability base material of experimental example 1,2,5~7 and 9, thickness 1.2mm;The photopermeability of experimental example 3,4,8 and 10 Base material, thickness 2.2mm.Experimental example 1~10 all includes that the protruding portion 20 of multiple islands is formed in the first surface 101 of ontology 10 The first surface 101 of ontology 10 is gone up and protrudes from, protruding portion 20 and ontology 10 are integrally formed.
Briliancy, average quadrangle are spent together:
It is carried out to use the Japan to open up the brightness photometer of model BM-7A manufactured by general Kanggong department (TOPCON CORPORATION) It measures, and the light diffusing sheet of experimental example 1~10 and comparative example is set to the lamp box being arranged with LED lamp source array when measuring Briliancy measurement is carried out in module.Wherein, briliancy (luminance) value is numerical value after standardization, i.e., by the center of experimental example 1~10 Briliancy measuring value with comparative example center briliancy measuring value be 100% be standardized after numerical value.Average quadrangle together degree be with The average value of rear four numerical value of the briliancy of module quadrangle divided by the center briliancy of module.
Roughness:
Roughness is by the laser confocal instrument (model VK-X100Series) for using Ji Ensi (KEYENCE) company As fine structure measuring instrument, according to the method illustrated in JIS B0601-2001, in 10mm × 10mm blocks, at random It measures, with 50 times of multiplying power, roughness parameter Ra or Rz obtained by the roughness curve that measurement surface roughness is obtained;Wherein Rz Represent difference (difference) data of highest point and lowest point.
Platform top surface is to the height (Hp) of first surface, upright projection width (Ws), the inclined-plane angle on inclined-plane:
With a laser confocal instrument directly measures experimental example 1~10 and comparative example surface and obtains experimental example 1~10 and ratio Compared with the sectional view curve of example, sectional view curve is that interception is taken up an official post point-to-point transmission longest distance (i.e. longest berm width from platform surface Wm measure), then respectively the platform top surface 201 of protruding portion 20 to the height (Hp) of first surface 101, protruding portion 20 inclined-plane the Upright projection width (Ws) on one surface 101, in this case experimental example, the measuring value of upright projection width (Ws) be one along The left side of longest berm width Wm extends numerical value, but is not limited thereto, i.e., upright projection width (Ws) is along longest platform The side of width Wm is extended numerical value, is calculated the angle of α 1, α 2 with trigonometric function by the numerical value of Hp, Ws, later again with 180- α 1 (or 180- α 2) conversion inclined-plane angle.
The spacing of two adjacent island protruding portions:
It is by laser confocal instrument (model VK-X100Series) conduct for using Ji Ensi (KEYENCE) company Measuring instrument, it is random to measure 20 point datas in 10mm × 10mm blocks, wherein minimum range between two adjacent island protruding portions _ Max is expressed as the maximum value between two adjacent island protruding portions in the measuring value of minimum range in measuring range;Two adjacent islands are prominent Go out minimum range _ Min between portion and is expressed as minimum in measuring range between two adjacent island protruding portions in the measuring value of minimum range Value.Distance ranging from 0.01mm~1mm (10 μm~1000 μm) between two adjacent island protruding portions, preferably 0.015mm~ 0.95mm (15 μm~950 μm).
The longest berm width Wm of irregular platform top surface 201 and minimum land lengths Dm:
It is by laser confocal instrument (model VK-X100Series) conduct for using Ji Ensi (KEYENCE) company Measuring instrument, it is random to measure 20 point datas in 10mm × 10mm blocks, taken up an official post point-to-point transmission longest distance with obtaining platform surface Longest berm width Wm range and the minimum land lengths Dm vertical with longest berm width Wm range.Protruding portion 20 Irregular platform top surface 201 longest berm width Wm be in the range of 0.15mm~8mm (150 μm~8000 μm), In the range of preferably 0.155mm~7mm, in the range of more preferably 0.158mm~6mm.The irregular platform of protruding portion 20 The minimum land lengths Dm of top surface 201 be in the range of 0.03mm~1.5mm, in the range of preferably 0.05mm~1.2mm, In the range of more preferably 0.07mm~1.05mm.
The area/perimeter (μm) of protruding portion, protruding portion area ratio (%):
It is surveyed by using the light microscope (Optical Microscope, model Bx-60F5) of Olympus companies to be used as Measuring appratus, shooting 6.821mm × 5.312mm (area 36.233mm2) image in block, and by analysis software (Image-Pro Plus) calculates the area of each protruding portion and perimeter within the scope of this and is counted, area/week of protruding portion Protruding portion perimeter sum total in protruding portion area sum total/range in long (μm)=range;In protruding portion area ratio (%)=range Protruding portion area sum total/measuring range area (36.233mm2).Fig. 3 A to Fig. 3 H are please referred to, are painted respectively with optical microphotograph The schematic diagram that mirror locally shoots experimental example 1,2, the photopermeability base material of 5-10;Wherein photopermeability base material has multiple Island protruding portion protrudes from the first surface of ontology, and the outline border curve of protruding portion is area/perimeter measuring range, protruding portion Thick frame portion is divided into inclined plane part, and thick frame portion divides corral place to be slightly table top in coarse part.In one embodiment, protruding portion Area/perimeter in the range of 100 μm~200 μm, in the range of preferably 110 μm~190 μm, more preferably 115 μm~175 In the range of μm.In one embodiment, protruding portion area ratio is in the range of 35%~70% preferably 38%~68% In the range of, in the range of more preferably 40%~66%.
The above measurement is embedded in together in table 1.
Table 1
1 (Continued) (experimental example 6-10) of table
Fig. 4 is please referred to, the comparative example part table that comparative example surface is directly measured with a laser confocal instrument and is obtained is painted The roughness curve in face.According to measurement, existing difference of the diffuser plate (comparative example) without apparent top surface and bottom surface, is all coarse Face, with the very big pit-hole of many high low heads.Wherein two groups of surface Rz are 11.99 μm and 9.49 μm, represent existing diffuser plate The degree of surface irregularity is very big.
Referring to Fig. 5 A and Fig. 5 B.Fig. 5 A are painted the light transmission that experimental example 1 is directly measured with a laser confocal instrument 1 protruding portion of property base material, 20 surface and the roughness curve of the platform top surface 201 of protruding portion 20 obtained.The protruding portion of experimental example 1 20 201 general planar of platform top surface, a small number of tiny pit-holes;The pit-hole depth of measurement platform top surface 201, wherein two groups of Rz data For 0.52 μm and 0.41 μm.Fig. 5 B are then painted the protrusion of photopermeability base material 1 that experimental example 1 is directly measured with a laser confocal instrument 10 first surface 101 of ontology other than portion 20 and the roughness curve obtained.The first surface of ontology 10 other than protruding portion 20 101 is also flat, rare pit-hole;The pit-hole depth on its surface is measured, wherein two groups of Rz data are 0.95 μm and 0.98 μm.
Referring to Fig. 6 A and Fig. 6 B.Fig. 6 A are painted the light transmission that experimental example 2 is directly measured with a laser confocal instrument 1 protruding portion of property base material, 20 surface and the roughness curve of the platform top surface 201 of protruding portion 20 obtained.The protruding portion of experimental example 2 20 platform top surface 201 is very flat, rare pit-hole;The pit-hole depth of measurement platform top surface 201, wherein two groups of Rz data are 0.49 μm and 0.61 μm.Fig. 6 B are painted directly measures the photopermeability base material 1 of experimental example 2 in protruding portion with a laser confocal instrument 10 first surface 101 of ontology other than 20 and the roughness curve obtained.The first surface 101 of ontology 10 other than protruding portion 20 Also general planar, rare pit-hole;The pit-hole depth on its surface is measured, wherein two groups of Rz data are 0.48 μm and 0.31 μm.
Fig. 7 is please referred to, the schematic diagram of the backlight module of one embodiment of the invention is painted.The backlight module 700 of the present embodiment For example, it is suitable for the direct type backlight module of panel display module comprising a diffuser plate 710,720 (Fig. 7 of an at least light source It is painted multiple light sources) and a frame 740.Frame defines an accommodating space 742, and diffuser plate 710 and light source 720 are located at accommodating space In 742, diffuser plate 710 is placed in the top of light source 720.Diffuser plate 710, any in experimental example 1~10 e.g. of the present invention Photopermeability base material includes the ontology (main body) 10 with a first surface 101, and on first surface 101 And protrude from a protruding portion (protrusion) 20 for first surface.Light source 720 is oppositely arranged with first surface 101, also that is, One surface 101 is light incident surface.Light source 720 includes substrate 722 and luminescence unit 724, and luminescence unit 724 is, for example, light-emitting diodes It manages the light-emitting component of (light emitting diode, LED) element or other types and is configured on substrate 722.It shines single 724 light that send out of member enter after diffuser plate 710 through 102 light extraction of second surface by diffuser plate 710, so as to formed high briliancy and High briliancy spends area source together.
In one embodiment, backlight module 700 can be used as the backlight module of a display, e.g. a liquid crystal Show device.
Table 2 lists the spacing metric data of two adjacent island protruding portions in the photopermeability base material of experimental example 1 and experimental example 2 Value.It is by use Ji Ensi (KEYENCE) company laser confocal instrument (model VK-X100Series) be used as measuring instrument Device measures, wherein maximum value is expressed as in measuring range between two adjacent island protruding portions at random in 10mm × 10mm blocks Greatest measure in the measuring value of minimum range;Minimum value is expressed as in measuring range minimum range between two adjacent island protruding portions Measuring value in minimum value.
Table 2
Table 3 lists the irregular platform top surface of island protruding portion 20 in the photopermeability base material of experimental example 1 and experimental example 2 201 longest berm width Wm metric data values.It is by the laser confocal instrument for using Ji Ensi (KEYENCE) company (model VK-X100Series) is used as measuring instrument, in 10mm × 10mm blocks, measures at random.Table 3 is also listed using base grace The laser confocal instrument (model VK-X100Series) of this (KEYENCE) company is used as measuring instrument, and it is high to measure comparative example surface Distance between the pit-hole of low head.Comparative example surface has ranging from 5 μm~50 μm of distance between the pit-hole of high low head.
Table 3
Comparative example (μm) Experimental example 1 (μm) Experimental example 2 (μm)
1 33.27 984.22 2496.32
2 21.74 241.6 3875.68
3 18.51 291.07 1021.06
4 18.7 884.84 549.64
5 32.28 383.54 475.02
6 45.65 4271.6 464.37
7 15.68 2938.2 1321.52
8 22.01 558.68 3777.44
9 27.24 486.36 1449.19
10 17.99 2185.7 1912.42
11 20.65 5304.78 617.6
12 21.66 1010.92 2987.78
13 20.65 237.54 519.9
14 8.7 385.79 2946.14
15 10.87 646.49 1397.82
16 39.13 736.59 866.05
17 13.09 589.33 665.96
18 5.43 5904 1993.01
19 15.22 551.07 3165.52
20 19.23 912.23 4004.07
In conclusion the photopermeability base material that embodiment proposes, there is the protruding portion such as above-mentioned special designing to be formed in master On body surface face.The photopermeability base material of Application Example is (as shown in Figure 1) when being used as diffuser plate, and order has protruding portion 20 to be formed in First surface 101 towards the light source of backlight module, therefore first surface 101 is incidence surface, and the second surface 102 of main body 10 is Light-emitting surface.The photopermeability base material of Application Example not only makes the light-emitting zone of display device maintain high briliancy, compared to existing Diffuser plate more can be improved briliancy and spend together.Therefore, the photopermeability base material of Application Example can not only be promoted as diffuser plate The display effect of image can also reduce the quantity that other functional films use, and reduce manufacturing cost, and make the display of application Device integrally becomes more frivolous, has high application value especially for big size display.
Certainly, the present invention can also have other various embodiments, without deviating from the spirit and substance of the present invention, ripe Various corresponding change and deformations, but these corresponding change and deformations can be made according to the present invention by knowing those skilled in the art The protection domain of the claims in the present invention should all be belonged to.

Claims (24)

1. a photopermeability base material, which is characterized in that including:
One ontology has a first surface;And
One protruding portion, the protruding portion are integrally formed with the ontology, and the protruding parts are on the first surface and protruding from this First surface, the protruding portion have an irregular platform top surface and an inclined-plane, which is connected to the first surface with this not Regular shape platform top surface, it is 5 μm~40 μm that the irregular platform top surface to the first surface, which has a height (Hp), this is not advised Then longest berm width (Wm) ranging from 0.15mm~8mm for shape platform top surface;
Wherein, which has a thickness between 0.5mm~6mm ranges.
2. photopermeability base material according to claim 1, which is characterized in that the vertical throwing of the inclined-plane on the first surface A width (Ws) for shadow is at 10 μm~160 μm.
3. photopermeability base material according to claim 1, which is characterized in that an angle angle on the inclined-plane and the first surface Degree is ranging between 120 degree~177 degree.
4. photopermeability base material according to claim 1, which is characterized in that the irregular platform top surface refers to the protruding portion Thickness direction being projected as on the first surface towards the ontology is irregular.
5. photopermeability base material according to claim 1, which is characterized in that the photopermeability base material is by a translucent resin It is formed.
6. photopermeability base material according to claim 1, which is characterized in that further include multiple diffusion particles and be scattered in this Among body and the protruding portion, the average grain diameter of multiple diffusion particle is 0.1 μm~30 μm.
7. photopermeability base material according to claim 6, which is characterized in that the average grain diameter of multiple diffusion particle is 0.5 μm~20 μm.
8. photopermeability base material according to claim 6, which is characterized in that the average grain diameter of multiple diffusion particle is 1 μ M~5 μm.
9. photopermeability base material according to claim 1, which is characterized in that with multiple protruding portions being somebody's turn to do in the ontology On first surface, the minimum spacing between adjacent multiple protruding portion is between 10 μm~1000 μ ms.
10. photopermeability base material according to claim 1, which is characterized in that the first surface is other than the protruding portion Part is with a surface roughness for 0.1 μm hereinafter, the irregular deck roof face of the protruding portion is with a surface roughness It is 0.5 μm or less.
11. photopermeability base material according to claim 1, which is characterized in that the first surface is other than the protruding portion It is 0.01 μm~0.08 μm that part, which has a surface roughness, and the irregular deck roof face of the protruding portion has a surface thick Rugosity is 0.01 μm~0.3 μm.
12. photopermeability base material according to claim 1, which is characterized in that the first surface is other than the protruding portion It is 0.02 μm~0.07 μm that part, which has a surface roughness, and the irregular deck roof face of the protruding portion has a surface thick Rugosity is 0.03 μm~0.25 μm.
13. photopermeability base material according to claim 1, which is characterized in that the ontology separately have one relative to this first The second surface on surface, the surface roughness of the second surface is between 3 μm~30 μ ms.
14. photopermeability base material according to claim 13, which is characterized in that the first surface is incidence surface, this second Surface is light-emitting surface.
15. photopermeability base material according to claim 1, which is characterized in that the light transmittance of the photopermeability base material is 50%~70%.
16. photopermeability base material according to claim 1, which is characterized in that the irregular deck roof of the protruding portion Face is parallel to the first surface of the ontology.
17. photopermeability base material according to claim 1, which is characterized in that the protruding portion is wide in the corresponding longest platform At degree there is opposite the first inclined-plane and the second inclined-plane to be separately connected the first surface and the irregular platform top surface, and this One inclined-plane and the second inclined-plane form the first angle and the second angle with the first surface respectively, and wherein first angle is different from being somebody's turn to do Second angle.
18. photopermeability base material according to claim 1, which is characterized in that the protruding portion is wide in the corresponding longest platform At degree there is opposite the first inclined-plane and the second inclined-plane to be separately connected the first surface and the irregular platform top surface, and this One inclined-plane and the second inclined-plane form the first angle and the second angle with the first surface respectively, wherein first angle with this second Angle is between 120 degree~177 degree ranges.
19. photopermeability base material according to claim 1, which is characterized in that the irregular deck roof face has vertical In a minimum land lengths of the longest berm width, which is 0.03mm~1.5mm.
20. photopermeability base material according to claim 1, which is characterized in that the protruding portion accounts for the area of the first surface Ratio is 35%~70%.
21. photopermeability base material according to claim 1, which is characterized in that the ratio model of the area/perimeter of the protruding portion Enclose is 100 μm~180 μm.
22. a backlight module, which is characterized in that including:
One light source;And
Photopermeability base material described in any one of claim 1~21, wherein the light source is opposite set with the first surface It sets.
23. backlight module according to claim 22, which is characterized in that the first surface is incidence surface.
24. a display, which is characterized in that including:
Backlight module described in claim 22.
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