CN101865419A - Microstructured diffuser plate - Google Patents
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- CN101865419A CN101865419A CN200910135340A CN200910135340A CN101865419A CN 101865419 A CN101865419 A CN 101865419A CN 200910135340 A CN200910135340 A CN 200910135340A CN 200910135340 A CN200910135340 A CN 200910135340A CN 101865419 A CN101865419 A CN 101865419A
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Abstract
The invention discloses a microstructure diffusion plate, which comprises: the substrate is provided with a light incidence surface and a light emergence surface; the light emitting surface is covered with a plurality of microstructure parts, each microstructure part comprises a first microstructure unit and a second microstructure unit, each first microstructure unit comprises a first side surface, a second side surface, a top surface, a first interval, a second interval and a height, and the first side surface and the second side surface correspond to a first slope and a second slope; 1/2 is less than or equal to 2H/(P1-P2)/2 is less than or equal to 9/5; the second microstructure unit is in a curve function shape, a first low point is formed by the second microstructure unit and the second side surface of the first microstructure unit, and a second low point is formed by the second microstructure unit and the first side surface of the other first microstructure unit; the first side surface and the second side surface of the first microstructure unit receive light of a light source to form a first optical path, the top surface of the first microstructure unit receives light of the light source to form a second optical path, and the second microstructure unit receives light of the light source to form a third optical path.
Description
Technical field
The present invention refers to a kind of microstructural diffusion plate with multiple optical structure especially relevant for a kind of microstructural diffusion plate.
Background technology
The display unit of new generation such as LCD are are researched and developed in a large number and are carried out gradually the stage that use in market at present, but because liquid crystal itself is not luminous, the function of backlight module promptly is well-off brightness and the light source that is evenly distributed, make its normally display image, its basic principle is with point or linear light sources commonly used, changes into the area source product of high brightness and homogeneous briliancy by succinct effectively optical mechanism.The structure of general straight-down negative be the linear light sources of utilizing cold-cathode tube through reflector by the equal light action of diffuser plate and the light harvesting of prismatic lens do in order to the brightness that improves light source with all spend together.
The technology evolution constantly of diffuser plate at present, main purpose is to reach ray homogenization, research and develop from traditional single prism (prism) structure, for example U.S. Patent number US 6606133 discloses the diffuser plate (as shown in Figure 1) that a kind of exiting surface and incidence surface all have optical structure, this diffuser plate 1A has a body 2A, and the side of this body 2A is an incidence surface, another opposite side then is an exiting surface, form a prism (prism) structure 3A on this exiting surface, then form a plurality of convex body structure 4A on the incidence surface, but in general processing procedure, the difficulty of two-sided molding manufacture procedure is higher, the qualification rate of finished product is also low, also can cause the problem of blooming piece when assembling simultaneously.In addition, U.S. Patent number US 7255456 discloses a kind of exiting surface at diffuser plate and forms two kinds of optical textures, yet this two optical texture is respectively prism (prism) and lens pillar (lenticular), this diffuser plate has following disappearance: 1. these two kinds of structures all only have single optical effect, and prism only has spectrophotometric result; Lens pillar only has the expansion light effect, so that the ray homogenization effect is reached in both collocation is relatively poor.2. this prism structurally has a cusp, so can cause the scratch of other blooming piece during with the assembling of other optical sheet, makes the reliability of product reduce.3. when producing, the structure of cusp causes the moulding low or diffuser plate of the production qualification rate of diffuser plate comparatively difficult.
In other words, traditional diffuser plate ubiquity can't effectively promote the light uniformity or other assembling or the lower problem of moulding yield, causes the application surface of backlight module further to promote.Edge is, the improving of the above-mentioned disappearance of inventor's thoughts proposes a kind of reasonable in design and effectively improve the present invention of above-mentioned disappearance.
Summary of the invention
Main purpose of the present invention, be to provide a kind of microstructural diffusion plate, this microstructural diffusion plate is provided with the optical structure of two above different structures, and the single optical structure body can have two kinds of optical effects simultaneously: beam split and expansion light, and so that the light of preferable even character to be provided.
In order to reach above-mentioned purpose, the invention provides a kind of microstructural diffusion plate, comprise an incidence surface and an exiting surface, this incidence surface receives the light of a light source, and this microstructural diffusion plate comprises:
A plurality of micro-structural portion, be covered on this exiting surface, this a plurality of micro-structural portion comprises one first microstructure unit and one second microstructure unit, this first microstructure unit comprises one first side, one second side, one end face, one first spacing (P1), one second spacing (P2) and a height (H), this first side and this second side are respectively to having one first slope and one second slope, and this first side and this second side lay respectively at the both sides of this end face at a distance of this second spacing, the both sides that this first side and this second side lay respectively at this exiting surface are at a distance of this first spacing, by this end face to this incidence surface at a distance of this height;
Wherein, this first slope and this second slope satisfy following formula:
1/2≤2H/(P1-P2)/2≤9/5；
This second microstructure unit is a curvilinear function shape and is positioned on this exiting surface, this second microstructure unit abuts mutually with this first microstructure unit, and this second side of this second microstructure unit and this first microstructure unit forms one first low spot, first side of this second microstructure unit and another this first microstructure unit forms one second low spot, and this first low spot and this second low spot are positioned on this exiting surface;
When this a plurality of micro-structural portion receives the light of this light source, the light that this first side of this first microstructure unit and this second side receive this light source forms one first optical path, the light that this end face of this first microstructure unit receives this light source forms one second optical path, and the light that this second microstructure unit receives this light source forms one the 3rd optical path.
The invention also discloses a kind of microstructural diffusion plate, comprise an incidence surface and an exiting surface, this incidence surface receives the light of a light source, and this microstructural diffusion plate comprises:
A plurality of micro-structural portion, be covered on this exiting surface, this a plurality of micro-structural portion comprises one first microstructure unit and one second microstructure unit, this first microstructure unit comprises one first side, one second side, one first end face, one first spacing (P1), one second spacing (P2) and a height (H), this first side and this second side are respectively to having one first slope and one second slope, this first side and this second side lay respectively at the both sides of this end face and at a distance of this second spacing, this first side and this second side lay respectively at the both sides of this exiting surface and at a distance of this first spacing, by this end face to this exiting surface at a distance of this height;
Wherein, this first slope and this second slope satisfy following formula:
1/2≤2H/(P1-P2)/2≤9/5；
This second microstructure unit comprises one the 3rd side, one the 4th side and one second end face, the 3rd side and the 4th side are respectively to having one the 3rd slope and one the 4th slope, and the 3rd side and the 4th side lay respectively at the both sides of this second end face, this second microstructure unit abuts mutually with this first microstructure unit, this second side of the 3rd side of this second microstructure unit and this first microstructure unit forms one first low spot, first side of the 4th side of this second microstructure unit and another this first microstructure unit forms one second low spot, and this first low spot and this second low spot are positioned on this exiting surface;
Wherein, when this a plurality of micro-structural portion receives the light of this light source, this first side of this first microstructure unit and this second side form one first optical path, the 3rd side that reaches this second microstructure unit and the light that the 4th side receives this light source and form one second optical path, the light that this first end face of this first microstructure unit receives this light source forms one the 3rd optical path, and the light that this second end face of this second microstructure unit receives this light source forms one the 4th optical path.
The present invention also provides the backlight module of using above-mentioned microstructural diffusion plate.
The present invention has following useful effect: the optical structure that the present invention proposes can have the effect that expands light and beam split simultaneously, for example beam split can be carried out in the side of the trapezoidal optical structure of class, its end face can expand light, the optical structure of the two or more different kenels of arranging in pairs or groups simultaneously is to reach the uniform effect of quite outstanding light.
For enabling further to understand feature of the present invention and technology contents, see also following about detailed description of the present invention and accompanying drawing, yet accompanying drawing only provide with reference to and the explanation usefulness, be not to be used for the present invention is limited.
Description of drawings
Fig. 1 is the schematic diagram of the diffusion board structure of prior art;
Fig. 2 is the schematic diagram of first embodiment of microstructural diffusion plate of the present invention;
Fig. 2 A is an A part enlarged drawing among Fig. 1;
Fig. 2 B is second kind of schematic diagram of implementing aspect among first embodiment;
Fig. 2 C is the third schematic diagram of implementing aspect among first embodiment;
Fig. 3 is the schematic diagram of second embodiment of microstructural diffusion plate structure of the present invention;
Fig. 3 A is a B part enlarged drawing among Fig. 2;
Fig. 3 B is second kind of schematic diagram of implementing aspect among second embodiment;
Fig. 4 is the schematic diagram of the one-dimentional structure of first embodiment;
Fig. 5 is the schematic diagram of the two-dimensional structure of first embodiment;
Fig. 5 A is the schematic diagram of the two-dimensional structure of second embodiment;
Fig. 6 is the structural representation of microstructural diffusion plate of the present invention;
Fig. 7 is the luminous uniformity optics analogous diagram of microstructural diffusion plate of the present invention and existing diffuser plate;
Fig. 8 is the schematic diagram of the backlight module of the microstructural diffusion plate of application first embodiment;
Fig. 8 A is the schematic diagram of the backlight module of the microstructural diffusion plate of application second embodiment.
Wherein, Reference numeral:
1A diffuser plate 2A body
3A prism structure 4A convex body structure
1 microstructural diffusion plate, 10 main stor(e)ies
100 incidence surfaces, 101 exiting surfaces
11 bottoms, 12 microstructured layers
120,120 ' micro-structural portion, 121,121 ' the first microstructure units
1211A, the 1211A ' first side 1211B, 1211B ' second side
1212A, 1212A ' end face 122,122 ' the second microstructure units
1221A ' the 3rd side 1221B ' the 4th side
1222A ' second end face 123 the 3rd microstructure unit
131,131 ' the first low spots, 132,132 ' the second low spots
20 diffusion particles, 21 UV Absorption particles
3 backlight modules, 30 light sources
31 catoptric arrangement P1, first spacing
The P2 second spacing P second width
The specific embodiment
The invention provides a kind of microstructural diffusion plate 1, this microstructural diffusion plate 1 is provided with the optical structure of two above different structures and then reaches the diffusion effect of the good light uniformity.See also Fig. 2, Fig. 2 A, Fig. 2 B and Fig. 2 C, it is the first embodiment of the present invention, this microstructural diffusion plate 1 comprises an incidence surface 100 and an exiting surface 101, this incidence surface 100 receives the light (shown in the arrow of Fig. 2) of a light source, the invention is characterized in a plurality of micro-structural of moulding portion 120 on this exiting surface 101, it comprises a plurality of repetitions and staggered first microstructure unit 121 and second microstructure unit 122, this two optical structure structure that is differently contoured kenel wherein, this two optical structure can cause different optical effects for incident ray simultaneously, this incidence surface 100 then is simple plane, to improve the moulding qualification rate.Wherein, this first microstructure unit 121 is the trapezoidal structure, that is this first microstructure unit 121 has one first side 1211A, one second a side 1211B and an end face 1212A, and above-mentioned structure definable goes out one first spacing P1, one second a spacing P2 and a height H, this first side 1211A and this second side 1211B lay respectively at the both sides of this end face 1212A, this first side 1211A and this second side 1211B are respectively to having one first slope and one second slope, this second spacing P2 is the distance between this first side 1211A and this second side 1211B, this first spacing P1 then is another distance between this first side and this second side, and this first spacing P1 is a Breadth Maximum between the two, and this second spacing P2 then is a minimum widith between the two; In addition, this height H is the distance of this end face 1212A to this incidence surface 100.Moreover according to above-mentioned structure, this first slope and this second slope must satisfy following formula: 1/2≤2H/ (P1-P2)/2≤9/5, to reach preferable luminous aspect.
In addition, this second microstructure unit 122 is a curvilinear function shape and is positioned on this exiting surface 101, this second microstructure unit 122 abuts mutually with this first microstructure unit 121, both are staggered repeated arrangement, and this second microstructure unit 122 forms one first low spot 131 with this second side 1211B of this first microstructure unit 121, this second microstructure unit 122 forms one second low spot 132 with the first side 1211A of another this first microstructure unit 121, and this first low spot 131 is positioned on this exiting surface 101 with this second low spot 132.
When this a plurality of micro-structural portion 12 receives the light of these light sources, this first side 1211A of this first microstructure unit 121 and this second side 1211B receive the light 30 of this light source to form one first optical path, the light that this end face 1212A of this first microstructure unit 121 receives this light source 30 can form one second optical path, and the light that this second microstructure unit 122 receives this light source 30 then forms one the 3rd optical path.
In specific embodiment, this second microstructure unit 122 is the nemaline structure of a kind of conic, for example satisfy the line segment of circle, ellipse or parabolic equation formula, and the circular cone coefficient of this conic section is smaller or equal to (≤)-1, and this structure with conic section profile then can provide light to expand the effect of light.
In addition, the outer rim of the end face 1212A of this first microstructure unit 121 is a curve (shown in Fig. 2 A), an or straight line (shown in Fig. 2 B), so effect that two optical structures of above-mentioned two kinds of different structures can produce beam split simultaneously and expand light for the light that penetrates this exiting surface 101, it should be noted that in Fig. 2 A, this two optical structure has identical Breadth Maximum P (be both identical Pitch is arranged), this Breadth Maximum P then can be roughly between 40 μ m to 850 μ m, in other words, form one first width P between this first low spot 131 and this second low spot 132, and form one second width (promptly being equivalent to the first above-mentioned spacing P1) between this second low spot 132 and another first low spot 131, then this first width equates (P=P1) with this second width.On the other hand, this two optical structures the best is contour structure, but can also have difference in height between the two, but this difference in height is to be no more than 50% for good, for example suppose that first microstructure unit 121 is 1, then the height of this second microstructure unit 122 is then roughly between 0.5 to 1.5, with the qualification rate of the molding manufacture procedure of keeping this optical structure.
Please refer to Fig. 2 B, for light, this end face 1212A has the effect (i.e. second optical path) that expands light, two first, second side 1211A, 1211B then have the effect (i.e. first optical path) of beam split about it, beam split that can only be simple so this first microstructure unit 121 promptly has two kinds of optical characteristics or expansion light; And with light intensity, the spectrophotometric intensity of this first, second side 1211A, 1211B can be greater than the expansion luminous intensity of this end face 1212A, and for example incident light is 100, and then spectrophotometric intensity is 51, is 49 and expand luminous intensity, but not as limit.Second microstructure unit 122 then produces the effect (i.e. the 3rd optical path) that expands light.
Refer again to Fig. 2 A, for light, the end face 1212A of this curved surface kenel has the effect (i.e. second optical path) that expands light equally, about two first, second side 1211A, 1211B the effect (i.e. first optical path) of beam split is then arranged, with light intensity, the spectrophotometric intensity of this first, second side 1211A, 1211B can expand luminous intensity greater than end face 1212A equally.So implement in the aspect at above-mentioned two kinds, form the optical structure of two kinds of different kenels on this exiting surface 101, first microstructure unit 121 that wherein has the class trapezium structure can have beam split simultaneously and expand two kinds of optical effects of light, collocation has second microstructure unit 122 of expansion light effect (i.e. the 3rd optical path) again, can be with the effective homogenising of incident light, with the light of output high evenness.Please refer to Fig. 2 C, it is the third enforcement aspect in the first embodiment of the invention, this enforcement aspect is changed by Fig. 2 A to form, wherein more form the 3rd microstructure unit 123 of repeated arrangement on this exiting surface 101, wherein the 3rd microstructure unit 123 is same as first microstructure unit 121 among Fig. 2 B.And utilize the collocation of above-mentioned three kinds of different optical structures, can also improve the uniformity of light.
Then, please refer to Fig. 3 to Fig. 3 B, it is the second embodiment of the present invention, and different with first embodiment be that present embodiment utilizes the two or more optical structure of different in width (Pitch) definition in the exiting surface 101 of microstructural diffusion plate 1.Below will describe the various enforcement aspects of present embodiment in detail.Please refer to Fig. 2 A, in this specific embodiment, this first microstructure unit 121 ' with this second microstructure unit 122 ' be class trapezium structure, that is this first microstructure unit 121 ' have one first side 1211A ', one second a side 1211B ' and an end face 1212A ', and above-mentioned structure definable goes out one first spacing P1, one second a spacing P2 and a height H, this first side 1211A ' and this second side 1211B ' lay respectively at the both sides of this end face 1212A ', this first side 1211A ' and this second side 1211B ' are respectively to having one first slope and one second slope, this second spacing P2 is the distance between this first side 1211A ' and this second side 1211B ', this first spacing P1 then is another distance between this first side and this second side, in the present embodiment, this first spacing P1 is a Breadth Maximum between the two, and this second spacing P2 then is a minimum widith between the two; In addition, this height H is the distance of this end face 1212A ' to this incidence surface 100.Moreover according to above-mentioned structure, this first slope and this second slope must satisfy following formula: 1/2≤2H/ (P1-P2)/2≤9/5, to reach preferable luminous aspect.Similarly, this second microstructure unit 122 ' have one the 3rd side 1221A ', one the 4th side 1221B ' to reach one second end face 1222A ', the 3rd side 1221A ' and the 4th side 1221B ' be respectively to should having one the 3rd slope and one the 4th slope, and the 3rd side 1221A ' and the 4th side 1221B ' lay respectively at the both sides of this second end face 1222A '.This second microstructure unit 122 ' with this first microstructure unit 121 ' abut mutually and repeated arrangement alternately, this second microstructure unit 122 ' the 3rd side 1221A ' and this first microstructure unit 121 ' this second side 1211B ' formation one first low spot 131 ', this second microstructure unit 122 ' the 4th side 1221B ' and another this first microstructure unit 121 ' first side 1211A ' formation, one second low spot 132 ', this first low spot 131 ' with this second low spot 132 ' be positioned on this exiting surface 101.When this a plurality of micro-structural portion 120 ' when receiving the light of this light source 30, this first microstructure unit 121 ' this first side 1211A ' and this second side 1211B ' formation one first optical path, this second microstructure unit 122 ' the light of the 3rd side 1221A ' and this light source 30 of the 4th side 1221B ' reception form one second optical path, this first microstructure unit 121 ' the light of this light source 30 of this first end face 1212A ' reception form one the 3rd optical path, and this second microstructure unit 122 ' the light of this light source 30 of this second end face 1222A ' reception form one the 4th optical path.
And this first microstructure unit 121 ' with this second microstructure unit 122 ' difference be that both have different Breadth Maximums.In this specific embodiment, this second microstructure unit 122 ' with this first microstructure unit 121 ' this first low spot 131 of this second side 1211B ' formation ' with another this first microstructure unit 121 ' this second low spot 132 of first side 1211A ' formation ', this first low spot 131 ' and this second low spot 132 ' between form one first width P, and this second low spot 132 ' and another first low spot 131 ' between form one second width P1, then this first width and this second width are unequal, in other words, this first low spot 131 ' and this second low spot 132 ' between form one first width P, and formation one second width (promptly being equivalent to the first above-mentioned spacing P1) between this second low spot 132 and another first low spot 131, and it (is P ≠ P1) that this first width P is not equal to this second width P1, for example P is 350 μ m, and P1 is 300 μ m, but above-mentioned first width is identical with first embodiment with the scope of second width, roughly between 40 μ m to 850 μ m.Present embodiment utilizes the class trapezium structure of above-mentioned two kinds of different Breadth Maximums, can reach the effect that side beam split and end face expand light equally, and then exports the light with preferable uniformity.On the other hand, this first microstructure unit 121 ' can be a conic section shape, and the circular cone coefficient of this conic section is smaller or equal to (≤)-1.
Please refer to Fig. 3 B, it is second kind of enforcement aspect in the present embodiment, wherein with Fig. 3 A in difference be this first microstructure unit 121 ' end face 1212A ' be a curve, and the radius of curvature of this curve smaller or equal to (≤) this first microstructure unit 121 ' the first spacing P1; And this second microstructure unit 122 ' the outer rim of end face 1222A ' be similarly a curve, and the radius of curvature of this curve is smaller or equal to (≤)-1, similarly the effect that expands light by side beam split and end face is reached the light of output high evenness.In other words, this second microstructure unit 122 ' end face 1222A ' can be a curve or a straight line, and this first microstructure unit 121 ' end face 1212A ' also can be a curve or a straight line.
In addition, the present invention can be at this third optical structure of exiting surface 101 moulding, the third optical structure or the end face of this optical structure that for example have the 3rd Breadth Maximum can be curve or straight line collocation use or the like, the optical structure that utilizes above-mentioned bright dipping simultaneously and expand light provides the light of high evenness, and other character of present embodiment is equal to first embodiment, does not repeat them here.
Again on the one hand, above-mentioned structure can change according to the consideration in the optical design, please refer to Fig. 4, when microstructural diffusion plate 1 of the present invention is applied to fluorescent tube application such as (as CCLF), this first microstructure unit 121, second microstructure unit 122 or the 3rd microstructure unit 123 among above-mentioned first embodiment forms the structure (Fig. 4 only draws first microstructure unit 121 and second microstructure unit 122) of one dimension on this exiting surface 101.Be applied to application such as light emitting diode and work as microstructural diffusion plate 1, above-mentioned optical structure repeats and is staggered to form the structure of two dimension with construction on this exiting surface 101, and under two-dimensional structure, those optical structures can be convex body (two-dimensional structure of convex body that shows the optical structure of first embodiment as Fig. 5) or recess structure (two-dimensional structure of recess that shows the optical structure of second embodiment as Fig. 5 A).In other words, under different applicable cases, above-mentioned optical texture face can have corresponding variation, reaches the light output of good evenly effect simultaneously.In the same manner, other microstructural diffusion plate 1 of implementing in the aspect can be varied to one dimension or two-dimentional structure equally, to produce the purpose of homogenising light.
Please refer to Fig. 6, its inside that shows microstructural diffusion plate 1 of the present invention is formed and structure, it bottom 11 and one that comprises that a main stor(e)y 10, is arranged at these main stor(e)y 10 belows is arranged at the microstructured layers 12 of these main stor(e)y 10 tops, that is microstructural diffusion plate 1 of the present invention is the sandwich structure of a stratiform, wherein this main stor(e)y 10 is PS plastics (Polystyrene, PS) or polycarbonate (Polycarbonate, PC) material, and the best includes diffusion particle 20 in this main stor(e)y 10, can be further with equalizing light rays; This bottom 11 and this microstructured layers 12 then are arranged at the below and the top of this main stor(e)y 10 respectively, its material can be PS plastics (Polystyrene, PS) or MS plastics (Methylmethacrylate styrene), more include UV Absorption particle 21 in this bottom 11 and this microstructured layers 12, absorbing the ultraviolet light in light source own or the external light, and then prevent that microstructural diffusion plate 1 from producing the problem of yellow; In addition, aforesaid optical structure then is the surface (being exiting surface 101) that takes shape in this microstructured layers 12.Yet the number of plies of above-mentioned material or formation microstructural diffusion plate 1 only is the usefulness of explanation, is not in order to restriction the present invention.
In addition, be illustrated in figure 7 as and the present invention is directed to the optics simulation result figure that microstructural diffusion plate of the prior art and microstructural diffusion plate of the present invention 1 carry out the light uniformity, wherein each curve is represented the intensity of section (cross-sectional).Curve 1 has two CCFL light sources and does not have the light intensity that uses diffuser plate for using, wherein can find out the rough position that is arranged at 40 millimeters (mm) and 80 millimeters (mm) of these two CCFL, so light intensity concentrates on this two positions, and promptly significantly reduce away from the light intensity of this two positions, that is light is not homogenized; 2 of curves are illustrated in the diffuser plate that this two light source is provided with the prism (prism) of cusp, but crest and trough on the light intensity obviously appear in 2 of curves, that is the uniformity is unsatisfactory; 3 of curves are illustrated in this two light source and are provided with the prism (prism) of cusp and the composite construction formula diffuser plate of lens pillar (lenticular) (being No. 7255456 United States Patent (USP)s of US that reach described in the prior art), and the variation of its light intensity is also along with relative high-intensity position occurring with the distance of CCFL light source; In comparison, 5 Strength Changes of curve 4 and curve for the microstructural diffusion plate 1 of the application first embodiment of the present invention and second embodiment, relative position by curve can be found, microstructural diffusion plate 1 proposed by the invention can significantly improve the uniformity of light, that is the position that light intensity can not be subjected to the CCFL light source influences, and keep suitable uniformity coefficient, so all more existing diffuser plate of microstructural diffusion plate of the present invention 1 more can be exported the light of high evenness.
Moreover according to the experiment of above-mentioned luminous intensity, the present invention can provide uniformity coefficient quite high light, so when in fact using, microstructural diffusion plate 1 proposed by the invention two expansions of collocation sheets in addition promptly can be applicable to the use of end product; In comparison, existing diffuser plate must be arranged in pairs or groups three and be expanded sheet and just can be applied on the product, thus though the present invention under the effect of homogenising, or it is good performance that more existing diffuser plate is all arranged under the consideration of production cost.
Please refer to Fig. 8 and Fig. 8 A, it shows the backlight module 3 of microstructural diffusion plate 1 proposed by the invention.Fig. 8 is for using the backlight module 3 of first embodiment, and Fig. 8 A is then for using the backlight module 3 of second embodiment.Backlight module 3 comprises at least one light source 30; And above-mentioned microstructural diffusion plate 1, and this microstructural diffusion plate 1 is arranged at this light source 30 tops, and this light source 30 more is arranged in a catoptric arrangement 31 formed spaces, to produce the light of higher brightness.This light source 30 can be a cathode fluorescent tube (CCFL), a light emitting diode (LED), a planar light source (FFL), an external electrode fluorescent lamp pipe (EEFL) or a thermal cathode fluorescent tube (HCFL), or the light emitting source of other kind, and the feature of this microstructural diffusion plate 1 is same as aforesaid embodiment, so repeat no more.
In sum, the present invention has following advantage: for example have preferable light stepless action, because above-mentioned optical structure can have the effect that expands light and beam split simultaneously, for example beam split can be carried out in the side of the trapezoidal optical structure of class, its end face can expand light, the optical structure of the two or more different kenels of arranging in pairs or groups simultaneously also can reduce the problem that Moire interferes, so microstructural diffusion plate of the present invention can be reached the uniform effect of quite outstanding light.On the other hand, because microstructural diffusion plate structure proposed by the invention can be exported the quite high light of the uniformity, so when using with other blooming piece collocation, can reduce the quantity of other diaphragm, for example traditional diffuser plate need use three to expand sheet, but microstructural diffusion plate of the present invention then only needs two expands sheet, in other words, microstructural diffusion plate of the present invention can effectively reduce the manufacturing cost of final products (as display etc.), and then improves the using value of microstructural diffusion plate of the present invention.In addition, existing diffuser plate is provided with prism (prism), and prism is a kind of structure with cusp, and the structure of this kenel can cause the blooming that the is arranged at diffuser plate top problem because of friction scratch or damage; Opposite, the end face of structure of the present invention is plane or curved surface, so can solve the problem that prism structure causes.
The above only is preferred embodiment of the present invention, non-ly is intended to limit to scope of patent protection of the present invention, so the equivalence that all utilizations specification of the present invention and accompanying drawing are done changes, all in like manner all is contained in the scope of the present invention.
Claims (10)
1. a microstructural diffusion plate comprises an incidence surface and an exiting surface, and this incidence surface receives the light of a light source, it is characterized in that, this microstructural diffusion plate comprises:
A plurality of micro-structural portion, be covered on this exiting surface, this a plurality of micro-structural portion comprises one first microstructure unit and one second microstructure unit, this first microstructure unit comprises one first side, one second side, one end face, one first spacing (P1), one second spacing (P2) and a height (H), this first side and this second side are respectively to having one first slope and one second slope, and this first side and this second side lay respectively at the both sides of this end face at a distance of this second spacing, the both sides that this first side and this second side lay respectively at this exiting surface are at a distance of this first spacing, by this end face to this incidence surface at a distance of this height;
Wherein, this first slope and this second slope satisfy following formula:
1/2≤2H/(P1-P2)/2≤9/5；
This second microstructure unit is a curvilinear function shape and is positioned on this exiting surface, this second microstructure unit abuts mutually with this first microstructure unit, and this second side of this second microstructure unit and this first microstructure unit forms one first low spot, first side of this second microstructure unit and another this first microstructure unit forms one second low spot, and this first low spot and this second low spot are positioned on this exiting surface;
When this a plurality of micro-structural portion receives the light of this light source, the light that this first side of this first microstructure unit and this second side receive this light source forms one first optical path, the light that this end face of this first microstructure unit receives this light source forms one second optical path, and the light that this second microstructure unit receives this light source forms one the 3rd optical path.
2. microstructural diffusion plate as claimed in claim 1 is characterized in that: this second microstructure unit is a conic section shape, and the circular cone coefficient of this conic section is smaller or equal to (≤)-1.
3. microstructural diffusion plate as claimed in claim 1 is characterized in that: the end face of this first microstructure unit is all a protuberance person or a recess person.
4. microstructural diffusion plate as claimed in claim 1, it is characterized in that: first side that this second side of this second microstructure unit and this first microstructure unit forms this first low spot and another this first microstructure unit forms this second low spot, form one first width between this first low spot and this second low spot, and form one second width between this second low spot and another first low spot, then this first width and this second width are unequal.
5. microstructural diffusion plate as claimed in claim 1 is characterized in that: this end face of this first microstructure unit is a curve or a straight line.
6. a microstructural diffusion plate comprises an incidence surface and an exiting surface, and this incidence surface receives the light of a light source, it is characterized in that, this microstructural diffusion plate comprises:
A plurality of micro-structural portion, be covered on this exiting surface, this a plurality of micro-structural portion comprises one first microstructure unit and one second microstructure unit, this first microstructure unit comprises one first side, one second side, one first end face, one first spacing (P1), one second spacing (P2) and a height (H), this first side and this second side are respectively to having one first slope and one second slope, this first side and this second side lay respectively at the both sides of this end face and at a distance of this second spacing, this first side and this second side lay respectively at the both sides of this exiting surface and at a distance of this first spacing, by this end face to this exiting surface at a distance of this height;
Wherein, this first slope and this second slope satisfy following formula:
1/2≤2H/(P1-P2)/2≤9/5；
This second microstructure unit comprises one the 3rd side, one the 4th side and one second end face, the 3rd side and the 4th side are respectively to having one the 3rd slope and one the 4th slope, and the 3rd side and the 4th side lay respectively at the both sides of this second end face, this second microstructure unit abuts mutually with this first microstructure unit, this second side of the 3rd side of this second microstructure unit and this first microstructure unit forms one first low spot, first side of the 4th side of this second microstructure unit and another this first microstructure unit forms one second low spot, and this first low spot and this second low spot are positioned on this exiting surface;
Wherein, when this a plurality of micro-structural portion receives the light of this light source, this first side of this first microstructure unit and this second side form one first optical path, the 3rd side that reaches this second microstructure unit and the light that the 4th side receives this light source and form one second optical path, the light that this first end face of this first microstructure unit receives this light source forms one the 3rd optical path, and the light that this second end face of this second microstructure unit receives this light source forms one the 4th optical path.
7. microstructural diffusion plate as claimed in claim 6, it is characterized in that: first side that this second side of this second microstructure unit and this first microstructure unit forms this first low spot and another this first microstructure unit forms this second low spot, form one first width between this first low spot and this second low spot, and form one second width between this second low spot and another first low spot, then this first width and this second width are unequal.
8. microstructural diffusion plate as claimed in claim 6 is characterized in that: this first microstructure unit and this second microstructure unit are all a protuberance person or a recess person.
9. microstructural diffusion plate as claimed in claim 6 is characterized in that: this first microstructure unit is a conic section shape, and the circular cone coefficient of this conic section is smaller or equal to (≤)-1.
10. microstructural diffusion plate as claimed in claim 6 is characterized in that: this end face of this second microstructure unit is a curve or a straight line.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910135340A CN101865419A (en) | 2009-04-20 | 2009-04-20 | Microstructured diffuser plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910135340A CN101865419A (en) | 2009-04-20 | 2009-04-20 | Microstructured diffuser plate |
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|---|---|
| CN101865419A true CN101865419A (en) | 2010-10-20 |
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|---|---|---|---|
| CN200910135340A Pending CN101865419A (en) | 2009-04-20 | 2009-04-20 | Microstructured diffuser plate |
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| CN (1) | CN101865419A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570045A (en) * | 2011-10-28 | 2012-07-11 | 深圳光启高等理工研究院 | Microwave antenna |
| CN102854727A (en) * | 2011-07-01 | 2013-01-02 | 鸿富锦精密工业（深圳）有限公司 | Projecting apparatus |
| CN104100852A (en) * | 2013-04-09 | 2014-10-15 | 中蓝光电科技（上海）有限公司 | LED illuminating device with micro-structure optical film |
| CN108037555A (en) * | 2017-10-25 | 2018-05-15 | 苏州三鑫时代新材料股份有限公司 | Light diffusing sheet of Mobyneb haze and high transparency and preparation method thereof |
| CN108037557A (en) * | 2017-10-25 | 2018-05-15 | 苏州三鑫时代新材料股份有限公司 | The light diffusing sheet its preparation method of Mobyneb haze and high transparency |
| CN108037556A (en) * | 2017-10-25 | 2018-05-15 | 苏州三鑫时代新材料股份有限公司 | The light diffusing sheet its preparation method of Mobyneb haze and high transparency |
| CN108469007A (en) * | 2017-02-22 | 2018-08-31 | 采资新技股份有限公司 | Optical assembly of light shield |
| CN113075814A (en) * | 2021-03-25 | 2021-07-06 | Tcl华星光电技术有限公司 | Visual angle diffusion film and display panel |
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2009
- 2009-04-20 CN CN200910135340A patent/CN101865419A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102854727A (en) * | 2011-07-01 | 2013-01-02 | 鸿富锦精密工业（深圳）有限公司 | Projecting apparatus |
| CN102570045A (en) * | 2011-10-28 | 2012-07-11 | 深圳光启高等理工研究院 | Microwave antenna |
| CN102570045B (en) * | 2011-10-28 | 2014-04-16 | 深圳光启高等理工研究院 | Microwave antenna |
| CN104100852A (en) * | 2013-04-09 | 2014-10-15 | 中蓝光电科技（上海）有限公司 | LED illuminating device with micro-structure optical film |
| CN108469007A (en) * | 2017-02-22 | 2018-08-31 | 采资新技股份有限公司 | Optical assembly of light shield |
| CN108469007B (en) * | 2017-02-22 | 2020-01-03 | 采资新技股份有限公司 | Optical assembly of light shield |
| CN108037555A (en) * | 2017-10-25 | 2018-05-15 | 苏州三鑫时代新材料股份有限公司 | Light diffusing sheet of Mobyneb haze and high transparency and preparation method thereof |
| CN108037557A (en) * | 2017-10-25 | 2018-05-15 | 苏州三鑫时代新材料股份有限公司 | The light diffusing sheet its preparation method of Mobyneb haze and high transparency |
| CN108037556A (en) * | 2017-10-25 | 2018-05-15 | 苏州三鑫时代新材料股份有限公司 | The light diffusing sheet its preparation method of Mobyneb haze and high transparency |
| CN113075814A (en) * | 2021-03-25 | 2021-07-06 | Tcl华星光电技术有限公司 | Visual angle diffusion film and display panel |
| US12025816B2 (en) | 2021-03-25 | 2024-07-02 | Tcl China Star Optoelectronics Technology Co., Ltd. | Viewing angle diffuser film and display panel |
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Application publication date: 20101020 |