CN101153924A - Optical scattering module and method for forming optical scattering structure - Google Patents
Optical scattering module and method for forming optical scattering structure Download PDFInfo
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- CN101153924A CN101153924A CNA2006101412108A CN200610141210A CN101153924A CN 101153924 A CN101153924 A CN 101153924A CN A2006101412108 A CNA2006101412108 A CN A2006101412108A CN 200610141210 A CN200610141210 A CN 200610141210A CN 101153924 A CN101153924 A CN 101153924A
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Abstract
The invention discloses an optics diffusion module and a forming method of the optics diffusion structure, wherein, the optics diffusion module comprises a diffusion plate and a light diffusion structure. The light diffusion structure is formed on the diffusion plate. The light diffusion structure comprises a plurality of convex portions and a plurality of concave portions. The convex portions are arrayed into a two-dimensional array along a first direction and a second direction. The convex portions are arrayed into a two-dimensional array along the first direction and the second direction. Each of the convex portions closes to a plurality of concave portions. Each of the concave portions closes to a plurality of convex portions. The curvatures of the convex parts, concave parts and the positions closing to the convex parts and the concave parts are all not zero. The invention forms the standing wave strip structure by using laser pull method matching the light shade on the base material to acquire the effect of light two-dimensional diffusion.
Description
Technical field
The present invention relates to a kind of optical pervasion module, relate in particular to a kind of optical pervasion module that makes the light diffusion by the lenticule that forms standing wave line form.
Background technology
Backlight module is along with the flat-panel screens market trend of large scaleization, simplification and low priceization, and light source transfers solid state LED light source or planar light source to by mercurous CCFL.Efficient and uniform backlight is provided, and the micro optical structure diaphragm plays a part very important.For cost and usefulness, microstructure optical membrane can provide lower material cost and preferable optical performance, therefore, the optical design of carrying out backlight diffusion with microstructure is a lot of, for pointolite or line source can see with single shaft to or biax mode reach the effect of diffusion.
Need to use heavy metal Hg to produce photochromic in the use of cold cathode luminous source or fluorescent tube in backlight module or the illumination of general fluorescent tube, and this will be restricted in environmental protection gradually.The light source of LED is brightness and day sharp increase, life-span is long, low power consumption, free of contamination solid state light emitter, therefore the scope of LED application constantly enlarges, use from general illumination to the display backlight source, it mainly is at the 3C appliance and electronic that present LED is applied on the display, each big factory of Japan and Korea S uses LED and pushes in large-sized flat-panel screens, the LED color saturation is good, can provide white light source with the mode of RGB mixed light or blue light collocation fluorescence, in manufacture process, can cooperate circuit to carry out the design regulation and control of light source, but compare with cold cathode fluorescent lamp, there is the colour temperature problem in its unit price height, and these all are problems extremely to be solved.Utilize the mode of single optics cap and array can reach local mixed light effect at present, diffusion design is to carry out with traditional diffusion slab mostly, how to make led light source be more evenly distributed, reduce LED use a number, reduce backlight module thickness, utilize effective micro optical structure diaphragm, evenly the spaced point light source is an important starting point of the present invention.
Generally speaking, it is to adopt diffuser plate (film) that traditional directly-down light source spreads present modal processing mode, in the mode of atomizing diffusion light source is evenly disperseed, and there are some problems in this mode.To cause briliancy reduction and light source by the absorbed loss because employing blendes together the atomizing slab, and blend together the mode that scattering is adopted in the particle diffusion, the angle of diffusion is not quite also uncontrollable.Another kind of mode is to take column type lens array structure, utilizes the principle of microstructure geometrical optics, just can reach higher briliancy and controllable diffusion angle with diaphragm, cooperates a slice diffusion barrier or atomizing treated side just can reach the effect of homogenising.General mode of making the column type mirror is nothing more than adopting machining, hot fusion method or other complex method to come moulding, and the interstitial treatment between the column type lens array, physical strength and replicability also are very important.Produce the problem of the macromolecule microstructure optical membrane of no gap, high mechanical properties and high structure replicability at manufacture process how to use special optical design and simplification, the present inventor had once disclosed with special light shield in number of patent application is two parts of applications for a patent for invention of CN 94133325 and CN 94133326 and had produced the method for continuous wave pattern shape micro structure array and the micro structure array that manufactures.
Described two parts of patented claims have disclosed the scheme of utilizing the dilatory method of laser and designing and manufacturing the mould that uses for the manufacturing lenticule in conjunction with light mask image.Shown in Figure 1A, laser beam B exposes on the base material 10 via light shield 5, and simultaneously that light shield 5 is dilatory towards the direction of L1, so, laser beam can be inscribed out groove 12 on base material 10.Described two technical schemes mainly are the etch quantities of control beam of laser energy diverse location on base material, produce three-dimensional structure to cause the cumulative effect of GTG.Wherein, the dilatory controllable parameter of laser comprises dilatory speed, laser energy, reaches repetition frequency etc., the integrally-built degree of depth of the main influence of this part, little or laser repetition rate that for example dilatory speed is faster, laser energy is healed heals and makes that the etch quantity in the unit interval is littler for a short time, causes the overall depth of structure more shallow; Otherwise, then darker.On the other hand, light mask image is to influence the topmost controlling factor of three-dimensional structure profile, shown in Figure 1B, on light shield M30, form concavo-convex figure M3, form concavo-convex staggered first lenticule 202 and second lenticule 204 on the base material by being radiated at of laser beam then, different by means of light mask image M3 central authorities and both-side opening area are caused the difference of two diverse location etch quantities, and then are produced the different degree of depth.In described two kinds of schemes, mainly utilized the oval or circular light mask image matrix combination of different major and minor axis, wherein, oval light shield axial ratio example is bigger, cause etch quantity difference bigger, and form the less elliptic curve of curvature, if select for use circular mask then to form the curved surface of sub-circular.
Fig. 2 A shows the situation that the microlens structure 200 of the light shown in Figure 1B diffusion usefulness and diffusion barrier 50 are used, and Fig. 2 B is the Illumination Distribution figure of the light that spread by means of microlens structure 200, and the strip region representation light among the figure converges the place.
Summary of the invention
The microlens structure of being mentioned in the background technology can make the diffusion of light one dimension, the object of the present invention is to provide a kind of optical scattering structure, and it can reach the effect that makes the light two-dimensional diffusion.In addition, the present invention also will provide a kind of formation method of optical scattering structure.
For realizing described purpose, the light diffuse module of the present invention's one preferred implementation comprises a diffuser plate and an optical scattering structure, and diffuser plate has one first, and optical scattering structure is formed on first.Optical scattering structure comprises: a plurality of juts and a plurality of depressed part, and described jut is arranged in the array of one two heap along first direction and second direction, and described depressed part is arranged in the array of a two dimension along first direction and second direction.Each jut is adjacent to a plurality of depressed parts, and each depressed part is adjacent to a plurality of juts, and the curvature of the adjacent of described jut, depressed part and jut and depressed part is all non-vanishing.
In described preferred implementation, along first direction, the distance between any two juts can equate or be unequal; Along second direction, the distance between any two juts can equate or be unequal.
Equally, in described preferred implementation, along first direction, the distance between any two depressed parts can equate or be unequal; Along second direction, the distance between any two depressed parts can equate or be unequal.
The present invention also provides a kind of formation method of optical scattering structure, comprises the following steps: to provide base material; Light shield is provided, and this light shield has a plurality of through holes, and these arrays of openings become array; Energy beam is provided; Light shield is placed between energy beam and the base material; In first party move up light shield or base material; And in second party move up light shield or base material, the light by energy beam forms a plurality of adjacent teats and depressed part via light shield on base material, make these teats and depressed part form two-dimensional array.
Description of drawings
For described and other purpose of the present invention, feature and advantage are become apparent, preferred implementation cited below particularly and the present invention is described in detail in conjunction with the accompanying drawings.
Figure 1A is the synoptic diagram that utilizes the dilatory manufactured microlens structure of laser;
Figure 1B is the stereographic map of the light shield of the dilatory method of laser and the microlens structure that manufactures;
The synoptic diagram of the practical application of the microlens structure that Fig. 2 A manufactures for Figure 1B;
Fig. 2 B is the Illumination Distribution figure by the light that microlens structure spread shown in Fig. 2 A;
Fig. 3 is for drawing method and cooperate light shield to make the synoptic diagram of optical scattering structure of the present invention by means of laser;
Fig. 4 is the synoptic diagram of the optical pervasion module that uses method shown in Figure 3 and manufacture;
Fig. 5 is the Illumination Distribution figure of an embodiment of optical scattering structure of the present invention;
Fig. 6 is the Illumination Distribution figure of another embodiment of optical scattering structure of the present invention;
Fig. 7 is the Illumination Distribution figure of the another embodiment of optical scattering structure of the present invention;
Fig. 8 is the Illumination Distribution figure of an embodiment again of optical scattering structure of the present invention;
Fig. 9 is the synoptic diagram that optical scattering structure of the present invention cooperates diffusion barrier to use;
Figure 10 is the synoptic diagram that optical scattering structure of the present invention cooperates nutty structure to use;
Figure 11 is the synoptic diagram that uses the diffuser plate of the macromolecular material manufacturing with light diffusion effect.
Description of reference numerals
5 light shields
10 base materials
12 grooves
50 diffusion barriers
120 first grooves
140 second grooves
200 microlens structures
202 first lenticules
204 second lenticules
500 optical scattering structures
600,700,800,900 optical pervasion modules
620 diffuser plates
621 surfaces (first face)
622 bottom surfaces (second face)
640 optical scattering structures
660 juts
680 depressed parts
The B laser beam
Distance between D1, the D2 two adjacent juts
Distance between D3, the D4 two adjacent depressed parts
The M3 figure
The M30 light shield
The L1 first direction
The L2 second direction
Embodiment
Optical scattering structure of the present invention mainly is to cooperate light shield to form on base material with the dilatory method of the laser described in the background technology to stay undulatory structure, to reach the effect that makes the light two-dimensional diffusion.Below explanation as the how dilatory manufactured of the laser optical scattering structure of staying undulatory optical scattering structure and manufacturing respectively.
Fig. 3 is for drawing method and cooperate light shield to make the synoptic diagram of optical scattering structure of the present invention by means of laser.Similar with Figure 1A, utilize the light shield (not shown) to move along first direction L1, simultaneously form a plurality of first grooves 120 with laser beam irradiation, then light shield is moved along second direction L2, and irradiating laser and form a plurality of second grooves 140, the overlapping part of first groove 120 like this and second groove 140 has just formed stays undulatory optical scattering structure 500.
Fig. 4 shows the optical pervasion module 600 that uses method shown in Figure 3 to make.Optical pervasion module 600 comprises diffuser plate 620 and optical scattering structure 640.Optical scattering structure 640 comprises a plurality of juts 660 and a plurality of depressed part 680, jut 660 is arranged in the array of two dimension along first direction L1 and second direction L2, equally, depressed part 680 also is arranged in two-dimentional array along first direction L1 and second direction L2, jut 660 forms with depressed part 680 arrangements interlaced with each other (that is, a row jut 660 is adjacent to a row depressed part 680) and stays corrugated.In the present embodiment, each jut 660 is adjacent to four depressed parts 680, and each depressed part 680 is adjacent to four juts 660, and it is 0 that the design (as stated in the Background Art) by light shield makes jut 660, depressed part 680 and jut 660 neither with the curvature of depressed part 680 adjoiners.On first direction L1, the distance between the two adjacent juts 660 is D1, and the distance between the two adjacent depressed parts 680 is D3.On second direction L2, the distance between the two adjacent juts 660 is D2, and the distance between the two adjacent depressed parts 680 is D4.
D1=D2 and D3=D4 in Fig. 4, but D1, D2, D3 and D4 can have multiple combination, below describe with Illumination Distribution figure respectively.
Fig. 5 is the Illumination Distribution figure of an embodiment of optical scattering structure of the present invention.Wherein, on first direction L1, the distance D 1 between any two juts 660 all equates, and the distance D 3 between any two depressed parts 680 all equates, on second direction L2, the distance D 2 between any two juts 660 all equates, and the distance D 4 between any two depressed parts 680 all equates.
Fig. 6 is the Illumination Distribution figure of another embodiment of optical scattering structure of the present invention.Wherein, on first direction L1, distance D 1 between any two juts 660 all equates, and the distance D 3 between any two depressed parts 680 equates that all on second direction L2, the distance D 2 between any two juts 660 is unequal, and the distance D 4 between any two depressed parts 680 is unequal, D2 and D4 be in the middle body minimum, and increase gradually from the mediad both sides, and then diminish gradually.
Fig. 7 is the Illumination Distribution figure of the another embodiment of optical scattering structure of the present invention.Wherein, on first direction L1, distance D 1 between any two juts 660 all equates, and the distance D 3 between any two depressed parts 680 all equates, on second direction L2, the distance D 2 between any two juts 660 is unequal, and the distance D 4 between any two depressed parts 680 is unequal, D2 and D4 be in the middle body maximum, and increase little gradually from the mediad both sides.
Fig. 8 is the Illumination Distribution figure of an embodiment again of optical scattering structure of the present invention.Wherein, on first direction L1, the distance D 1 between any two juts 660 is unequal, and the distance D 3 between any two depressed parts 680 is unequal, and D1 and D3 be in the middle body minimum, and increases gradually from the mediad both sides, and then diminishes gradually.On second direction L2, the distance D 2 between any two juts 660 is unequal, and the distance D 4 between any two depressed parts 680 is unequal, and D2 and D4 be in the middle body minimum, and increases gradually from the mediad both sides, and then diminishes gradually.
Described each embodiment only is several in the multiple combination, describe as example, the present invention is not limited to this certainly, for example on first direction L1, distance D 1 between any two juts 660 can be unequal, but the distance D 3 between any two depressed parts 680 equates.
In addition, in described each embodiment, though first direction L1 and second direction L2 quadrature, first direction L1 and second direction L2 also can be non-orthogonal, and not as restriction.
Moreover diffuser plate 620 of the present invention also can be used in combination with traditional diffusion barrier 50 and form optical pervasion module 700, and as shown in Figure 9,30 is the led array module among the figure.Perhaps being formed at surface (first face) 621} at the bottom surface of diffuser plate 620 (second face) 622{ optical scattering structure 600 forms nutty structure or to bottom surface 622 processing that atomizes, can add the high light diffusion effect, optical pervasion module 800 as shown in figure 10.In addition, also available macromolecular material with light diffusion effect forms diffuser plate 620, optical pervasion module 900 as shown in figure 11.
Though by preferred implementation the present invention is disclosed in; but this is not to be limitation of the present invention; the any technician in this area is under the prerequisite that does not exceed design of the present invention and scope; can make some conversion and retouching, so protection scope of the present invention should be as the criterion with the scope that claims define.
Claims (33)
1. optical pervasion module comprises:
One diffuser plate, it has one first;
One optical scattering structure, it is formed on described first, and this optical scattering structure comprises:
A plurality of juts, they are aligned to the array of a two dimension along first direction and second direction;
A plurality of depressed parts, they are aligned to the array of a two dimension along described first direction and second direction, wherein, each jut is adjacent to a plurality of depressed parts, each depressed part is adjacent to a plurality of juts, and the curvature of the adjacent of these juts, depressed part and jut and depressed part is all non-vanishing.
2. optical pervasion module as claimed in claim 1, wherein, along described first direction, the distance between any two juts all equates.
3. optical pervasion module as claimed in claim 2, wherein, along described second direction, the distance between any two juts all equates.
4. optical pervasion module as claimed in claim 3, wherein, along described first direction, the distance between any two depressed parts all equates.
5. optical pervasion module as claimed in claim 4, wherein, along described second direction, the distance between any two depressed parts all equates.
6. optical pervasion module as claimed in claim 2, wherein, along described second direction, the distance between any two juts is unequal.
7. optical pervasion module as claimed in claim 6, wherein, along described second direction, the distance between any two juts from the mediad dual-side of going back optical scattering structure decrescence.
8. optical pervasion module as claimed in claim 6, wherein, along described second direction, the distance between any two juts from late the mediad dual-side of optical scattering structure is cumulative.
9. optical pervasion module as claimed in claim 6, wherein, along described first direction, the distance between any two depressed parts all equates.
10. optical pervasion module as claimed in claim 9, wherein, along described second direction, the distance between any two depressed parts is unequal.
11. optical pervasion module as claimed in claim 10, wherein, along described second direction, the distance between any two depressed parts from the mediad dual-side of described optical scattering structure decrescence.
12. optical pervasion module as claimed in claim 10, wherein, along described second direction, the distance between any two depressed parts is cumulative from the mediad dual-side of described optical scattering structure.
13. optical pervasion module as claimed in claim 1, wherein, along described first direction, the distance between any two juts is unequal.
14. optical pervasion module as claimed in claim 13, wherein, along described second direction, the distance between any two juts is unequal.
15. optical pervasion module as claimed in claim 14, wherein, along described first direction, the distance between any two juts from the mediad dual-side of described optical scattering structure decrescence.
16. optical pervasion module as claimed in claim 15, wherein, along described second direction, the distance between any two juts from the mediad dual-side of described optical scattering structure decrescence.
17. optical pervasion module as claimed in claim 15, wherein, along described second direction, the distance between any two juts is cumulative from the mediad dual-side of described optical scattering structure.
18. optical pervasion module as claimed in claim 14, wherein, along described first direction, the distance between any two juts is cumulative from the mediad dual-side of described optical scattering structure.
19. optical pervasion module as claimed in claim 18, wherein, along described second direction, the distance between any two juts is cumulative from the mediad dual-side of described optical scattering structure.
20. optical pervasion module as claimed in claim 13, wherein, along described first direction, the distance between any two depressed parts is unequal.
21. optical pervasion module as claimed in claim 20, wherein, along described second direction, the distance between any two depressed parts is unequal.
22. optical pervasion module as claimed in claim 1 wherein, also comprises a diffusion barrier, from the light of light source in regular turn by this diffusion barrier and described light diffusing sheet and spread.
23. optical pervasion module as claimed in claim 1, wherein, described diffuser plate also has one second, forms granular structure on this second, from the light of light source in regular turn by this second and described first and spread.
24. optical pervasion module as claimed in claim 1, wherein, described diffuser plate also has one second, forms the atomizing structure on this second, from the light of light source in regular turn by this second and described first and spread.
25. optical pervasion module as claimed in claim 1, wherein, described diffuser plate is made by the macromolecular material with diffusion effect.
26. the formation method of an optical scattering structure comprises the following steps:
One base material is provided;
One light shield is provided, and this light shield has a plurality of through holes, and these through holes are aligned to array;
One energy beam is provided;
Described light shield is placed between described energy beam and the described base material;
Move described light shield or base material along first direction; And
Move described light shield or base material along second direction, the light of described energy beam forms a plurality of adjacent teats and depressed part via described light shield on described base material whereby, and these teats and depressed part form the array of a two dimension.
27. the formation method of optical scattering structure as claimed in claim 26, wherein, described first direction and described second direction quadrature.
28. the formation method of an optical scattering structure comprises the following steps:
One base material is provided;
One first light shield is provided, and this light shield has a plurality of first through holes, and these first through holes are aligned to array;
One second light shield is provided, and this light shield has a plurality of second through holes, and these second through holes are aligned to array;
One energy beam is provided;
Described light shield is placed between described energy beam and the described base material;
Move described first light shield or described base material along first direction; And
Along second party move up described second light shield or described base material, the light of described energy beam forms a plurality of adjacent teats and depressed part via described light shield on described base material whereby, and these teats and depressed part form the array of a two dimension.
29. the formation method of optical scattering structure as claimed in claim 28, wherein, described first direction and described second direction quadrature.
30. the formation method of optical scattering structure as claimed in claim 28, wherein, the distance between any first through hole all equates.
31. the formation method of optical scattering structure as claimed in claim 30, wherein, the distance between any second through hole all equates.
32. the formation method of optical scattering structure as claimed in claim 30, wherein, the distance between any second through hole is unequal.
33. the formation method of optical scattering structure as claimed in claim 28, wherein, the distance between any first through hole is unequal, and the distance between any second through hole is unequal.
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| CNB2006101412108A CN100555004C (en) | 2006-09-28 | 2006-09-28 | The formation method of optical pervasion module and optical scattering structure |
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| CNB2006101412108A CN100555004C (en) | 2006-09-28 | 2006-09-28 | The formation method of optical pervasion module and optical scattering structure |
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| US8210714B2 (en) | 2008-08-28 | 2012-07-03 | Industrial Technology Research Institute | Illuminant module with optical film of multiple curvatures |
| CN101684916B (en) * | 2008-09-22 | 2012-05-30 | 财团法人工业技术研究院 | Optical module with changeful curvature |
| CN104819434A (en) * | 2015-04-16 | 2015-08-05 | 宁波江北激智新材料有限公司 | Brightness balance membrane and lighting equipment and display equipment backlight source both adopting brightness balance membrane |
| CN104914490A (en) * | 2015-07-03 | 2015-09-16 | 宁波江北激智新材料有限公司 | Light equalizing film and using equipment thereof |
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