CN101963678B - Brightening diffusion film - Google Patents
Brightening diffusion film Download PDFInfo
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- CN101963678B CN101963678B CN200910157614XA CN200910157614A CN101963678B CN 101963678 B CN101963678 B CN 101963678B CN 200910157614X A CN200910157614X A CN 200910157614XA CN 200910157614 A CN200910157614 A CN 200910157614A CN 101963678 B CN101963678 B CN 101963678B
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Abstract
The invention provides a brightening diffusion film, which is suitable for a display or lighting equipment. The brightening diffusion film comprises a substrate layer and a light processing layer positioned on a light-emitting surface of the substrate layer, wherein the light processing layer comprises a plurality of adjacent connected orthohexagonal micro lenses with approximately equal heights and a plurality of bottom grooves surrounding the micro lenses; every micro lens has a vertex which is approximately positioned in a geometrical center; an array pitch P is formed between every two adjacent parallel bottom grooves; and a ratio of the curvature radius r of the bottom grooves to the array pitch P is between 1/50 and 3/25, thus the haze and the luminance gain ratio of the brightening diffusion film are improved under the condition that a diffusion structure does not need to be arranged specifically.
Description
Technical field
The present invention relates to a kind ofly be fit to be used on display or the light fixture, simultaneously with the blast diffusion barrier of the combined type of diffusion and brightening effect.
Background technology
The blooming that in the past was used for display is in design; Usually can divide into homodisperse diffusion barrier of light source and the brightness enhancement film that light source is concentrated according to the character of blooming; Through the diffusion barrier of multilayer and piling up of brightness enhancement film, let light source evenly and blast be incident upon on the display panel.Occur a kind of combined optical film with blast and diffusion function in recent years, the form of this combined optical film has a lot, below only lifts a kind of blooming in the past and explains.
Consult Fig. 1, Fig. 2, blast diffusion barrier 1 comprised in the past: the substrate layer of a printing opacity 11, one are combined in the diffusion brightening layer 13 on the anti-exiting surface 112 scraping 12 and combination of layer and this substrate layer 11 of diffusion on the incidence surface 111 of this substrate layer 11.The anti-layer 12 of scraping of this diffusion comprises a substrate 121 and a plurality of diffusion particle 122 that is dispersed in this substrate 121; Maybe the anti-layer 12 of scraping of this diffusion can be rugged structure; Purpose is to avoid scraping injuring the absorption problem that overcomes between diaphragm, and the semisphere lenticule 131 that this diffusion brightening layer 13 has a plurality of disorderly rows and highly do not wait.Utilize the shape of this lenticule 131 to carry out optically focused and utilize the dispersion of subparticle shape structure to strengthen diffusivity, can let blast diffusion barrier 1 have the effect of blast and diffusion simultaneously.
Though the design of blast diffusion barrier 1 can get a desired effect in the past, the mode that must turn over mould through electroforming is to make the concave surface master mold, and reshaping diffusion brightening layer 13 causes the trouble in the manufacturing, also can increase material cost simultaneously.In addition; Though blast diffusion barrier 1 can reach the purpose of diffusion and blast through random row and highly different lenticules 131 in the past; But 131 of adjacent lenticules many slits not of uniform size 132 are arranged, when light was seen off by the exiting surface 112 of substrate layer 11 and pass through this diffusion brightening layer 13, the effect of light through lenticule 131 and slit 132 time was inconsistent; Can produce inconsistent diffusion and printing opacity star sand effect, and reduce the display quality.According to reality test, individual mist degree of blast diffusion barrier 1 with this structure is poor, and effectively the lens density of optically focused reduces relatively, that is to say, the diffusion spotlight effect is more bad.
In addition; US 7; 286; 280 B2 patents of invention provide the brightness enhancement film of a kind of use on module backlight, and the characteristic of this brightness enhancement film is that the semisphere lenticule that a plurality of next-door neighbours are joined and diameter is bigger is set on the surface of film, then the filling lenticule of minor diameter one by one again between the slit between a plurality of adjacent major diameter lenticules.Though aforementioned U.S. patent of invention is eliminated the slit as far as possible, the uniformity coefficient when avoiding the slit to have influence on light source projects, no matter how intensive of the lenticule of large and small diameter still has the slit and exists, so also perfect not to the utmost with regard to the uniformity coefficient of light source processing.And have the US 2006-0146562 in addition of similar shortcoming and the United States Patent (USP) of US 7,092,166 grades, explanation no longer one by one with aforementioned patent of invention.
In addition, US 7,068; 433 B2 patents of invention disclose a kind of focusing screen control device (FOCUSING SCREEN MASTER) with microstructure; This device has a plurality of honeycombs (honeycomb) and compact arranged lenticule (microlens), utilizes the skew of the different and high point of lenticular height position, reaches the purpose of focusing; Though the Macro Lens of this honeycomb is fit to be used in the field that focuses on screen; If but suitable design is not passed through in the slit between each adjacent Macro Lens, its diffusion effect is still undesirable, so and be not suitable for directly being used on the module backlight of display for example.
Summary of the invention
The diffusion brightening structure that the purpose of this invention is to provide a kind of high evenness utilizes the shaped design of structure to cooperate simultaneously, and the luminance gain ratio of arranging in pairs or groups out suitable is to reach the blast diffusion barrier of different user demands.
Blast diffusion barrier of the present invention is fit to be applied on display or the light fixture; And comprise: substrate layer and one are positioned at the optical processing layer on the exiting surface of this substrate layer, and this optical processing layer comprises that lenticule and many of a plurality of adjacent connections and regular hexagon in the roughly same height are around this chase of lenticular end.
Blast diffusion barrier of the present invention; Said lenticule all has a summit that roughly is positioned at geometric center; Has an array spacing (pitch between chase of the adjacent and parallel end; Hereinafter to be referred as P), the ratio of the radius-of-curvature r of chase of the said end and this array pitch P can improve the mist degree and the luminance gain ratio of blast diffusion barrier whereby between 1/50 to 3/25.
Blast diffusion barrier of the present invention, said lenticule have a height H, and the ratio (H/P) of this height H and array pitch P, and promptly the depth-to-width ratio of this blast diffusion barrier is between 20% to 60%.Through controlling different depth-to-width ratios, can improve two luminance gain ratio or individual luminance gain ratios opened of blast diffusion barrier, make this blast diffusion barrier be fit to be used on display or the light fixture.
Blast diffusion barrier of the present invention, this blast diffusion barrier are fit to be used in two opening in the occasion of piling up, and the radius-of-curvature r of chase of the said end is between 1.5 μ m to 7.0 μ m.
Blast diffusion barrier of the present invention, this blast diffusion barrier are fit to be used in two opening in the occasion of piling up, and its depth-to-width ratio is between 37.5% to 48%.
Blast diffusion barrier of the present invention, this array pitch P is between 30 μ m to 60 μ m.
Blast diffusion barrier of the present invention, this increment diffusion barrier are fit to individual to be used respectively, and its depth-to-width ratio is between 34% to 55%.
Beneficial functional of the present invention is: borrow the lenticule of the regular hexagon that joins is being set on the exiting surface of substrate layer and end chase is set between said lenticule; Limit the radius-of-curvature of end chase simultaneously, can let the present invention utilize single structure just can reach the purpose of blast and diffused light source simultaneously.In addition, the present invention is through the cooperation of depth-to-width ratio (H/P) value, also can improve individual or two luminance gain ratios, makes this blast diffusion barrier be fit to be used in for example different occasions such as display and light fixture.
Description of drawings
Fig. 1 is a kind of cross-sectional schematic of the diffusion barrier of blast in the past;
Fig. 2 is this partial top view of blast diffusion barrier in the past;
Fig. 3 is the partial top view of the embodiment 1 of blast diffusion barrier of the present invention;
Fig. 4 is a cut-open view of being got along 4-4 line among Fig. 3.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is elaborated.
Before the present invention is described in detail, be noted that in following description similar elements is to represent with identical numbering.
Consult Fig. 3, Fig. 4; The embodiment 1 of blast diffusion barrier of the present invention comprises: a substrate layer 2 and an optical processing layer 3 that is positioned at exiting surface 21 tops of this substrate layer 2; Wherein this substrate layer 2 also has an incidence surface 22 that supplies light to get into, and the optical processing layer 3 of the embodiment of the invention 1 comprises: a plurality of tight arrangements and from this exiting surface 21 up outstanding regular hexagon lenticule 31 and around many first end chases 32, many second end chases 32 ' and a plurality of the 3rd end chase 32 of this lenticule 31 ".Each sexangle lenticule 31 all has six near chase of the said end 32,32 ', 32 " in one of them base 311 and a summit 312 that roughly is positioned at geometric center.
Chase of the above-mentioned end 32,32 ', 32 in the blast diffusion barrier of the present invention " radius-of-curvature r preferably between 1.5 μ m to 7.0 μ m; Above-mentioned array pitch P is preferably between 30 μ m to 60 μ m; Chase of the above-mentioned end 32,32 ', 32 " the ratio of radius-of-curvature r and above-mentioned array pitch P preferably between 1/50 to 3/25.
Cooperate and to consult table 1, the array pitch P of the embodiment of the invention 1 is 43 μ m, and the height H of lenticule 31 is 17.8 μ m, chase of the said end 32,32 ', 32 " radius-of-curvature r all be 3.0 μ m.Learn by test result; Individual mist degree of the embodiment of the invention 1 is 96.11%; Individual luminance gain ratio is 29.6%, and two luminance gain ratios are 44.0%, because this blast diffusion barrier is except having preferable mist degree; When two blast diffusion barriers piled up use, two luminance gains ratios of opening that it records were also up to 44%.That is to say; Through increasing chase and the depth-to-width ratio (height H of lenticule 31 is divided by the array pitch P of lenticule 31) of suitable control lenticule 31 around the lens; Can obtain preferable two Zhang Zuhe briliancy and atomizing effect; The depth-to-width ratio of the embodiment of the invention 1 (H/P) is 41.4% (17.8/43), and the restriction of this size makes the blast diffusion barrier be fit to be applied in for mist degree and reaches two luminance gains of opening than on the display of having relatively high expectations.That is to say; The embodiment of the invention 1 compares with the example in the past of Fig. 1, Fig. 2; Except being provided with the diffusion layer with diffusion particle, the two luminance gains of opening that are used for representing individual mist degree of diffusion effect and represent brightness were than all the person was good more in the past, therefore again; This embodiment 1 was simpler on not only making, and also had preferable diffusion effect and two luminance gain ratio of opening.
Table 1
1. luminance gain is than testing standard: produced with TOPCON company, model is the beam split brightness photometer of SR-3A, carries out the test of TCO-03.
2. mist degree testing standard: produced with NIPPON company, model is the haze meter of NDH-5000, carries out the test of JIS K 7105.
Lenslet dimension surveying instrument: KEYENCE VK-9500.
Consult table 1; The structure of the embodiment of the invention 2,3,4 is all identical with embodiment 1, and array pitch P and radius-of-curvature r are also identical with embodiment 1, but changes the height H of lenticule 31; That is to say; The height H of the lenticule 31 of the embodiment of the invention 2 is reduced to 15.52 μ m, and the height H of embodiment 3 is increased to 20.54 μ m, and the height H of embodiment 4 is increased to 23.56 μ m.Test result by table 1 learns that when the height H of lenticule 31 reduced, individual luminance gain of blast diffusion barrier was lower; Opposite; When the height H of lenticule 31 increased, individual luminance gain be than can improving, so when blast diffusion barrier of the present invention will be used in individual use occasion of light fixture for example; Select the bigger lenticule 31 of height H, can produce individual preferable luminance gain ratio.The depth-to-width ratio that blast diffusion barrier of the present invention adopts is preferably between 20% to 60%.
On the other hand, the height H of the lenticule 31 that the embodiment of the invention 2,3 is disclosed, individual mist degree and two open luminance gains than aspect good performance is also arranged, so the range of size of the demonstration of this embodiment 2,3 also is fit to be used on the display screen of display.In addition, learn that when the height H of lenticule 31 during greater than 23.56 μ m, two luminance gains are than can reducing significantly, but individual luminance gain there is significant lifting by the test findings of embodiment 4.Therefore, the proportional range of this embodiment of the invention 4 relatively is fit to be used on the light fixture.On the other hand, if blast diffusion barrier of the present invention be will be used in display the time, and the depth-to-width ratio of said lenticule 31 is between 34%～55%, preferable combination scope of embodiments; And depth-to-width ratio is between 37.5%～48% being the preferred embodiment of many combinations, with person in the past approximately slightly dome-type lenticule (depth-to-width ratio is about 49～50%) compare, have preferable many and pile up the briliancy performance; P=47 μ m for example, H=22.9 μ m, individual briliancy 40.9%; Depth-to-width ratio 48.7%; Can produce higher structure atomizing ability, avoid dazzle and individual higher luminance gain ratio is provided, reach purpose of energy saving to concentrate light.
Still consult table 1; Previous embodiment of the present invention be in the height H of inquiring into lenticule 31 for the luminance gain influence of mist degree when, 5,6 of the embodiment of the invention are to inquire into the appropriateness of radius-of-curvature r, are just learnt by the experiment knot of embodiment 5; When radius-of-curvature r is reduced to 1.95 μ m; Each item test figure of blast diffusion barrier is all very desirable, so the blast diffusion barrier of this dimensions is fit to be used on display or the light fixture, and is learnt by the test findings of embodiment 6; When radius-of-curvature r is increased to 6.8 μ m; Its individual mist degree and two luminance gain ratio of opening all have good performance, but individual luminance gain is poorer than slightly, is fit to be used on the display so have the blast diffusion barrier of this dimensions.
Still consult table 1, the structure of embodiments of the invention 7,8 is also identical with embodiment 1, and wherein the array pitch P of embodiment 7 is that the height H of 30 μ m, lenticule 31 is 12.8 μ m, and radius-of-curvature r is 2.0 μ m.Learnt to have the blast diffusion barrier of aforementioned ratio relation by test findings, its individual mist degree and two luminance gain ratio of opening all have good performance.Identical reason; After the embodiment of the invention 8 improves array pitch P, height H and radius-of-curvature r at the same time; Individual mist degree of this blast diffusion barrier and two luminance gain of opening have good performance than also, also are fit to be used on the product of display so have the blast diffusion barrier of aforementioned dimensions scope.
Can know by above explanation; The present invention borrows the lenticule 31 of a plurality of regular hexagons and 31 of adjacent lenticules recessed end chase 32,32 ', 32 is set "; and limit chase of the said end 32,32 ', 32 " the design of radius-of-curvature r; Not only be not shown in blast diffusion barrier in the past, previous designs also can let this blast diffusion barrier needn't use the for example diffusion structure of diffusion particle especially, just can produce higher mist degree and diffusion effect.In addition, the present invention also can select through the height H of lenticule 31, improves two luminance gain ratio or individual luminance gain ratios opened.That is to say, when the present invention uses on display for example, can select to have preferable two ratio combination of opening the luminance gain ratios; When the present invention is used in light fixture; Can select to have the proportional range of preferable individual luminance gain ratio,, also can needn't painstakingly design under the situation of diffusion structure so the design of this blast diffusion barrier of the present invention is not only novel; To select the mode of different proportion scope, let this blast diffusion barrier be fit to be applied on the Different products.
Claims (6)
1. blast diffusion barrier; Comprise: the optical processing layer on substrate layer with an exiting surface and the exiting surface that is positioned at this substrate layer, this optical processing layer comprise a plurality of adjacent connections and etc. lenticule and many of high regular hexagon around chase of the said lenticular end;
It is characterized in that; Said lenticule all has a summit that is positioned at geometric center; Between chase of the adjacent and parallel end, all have an array spacing P, and the ratio of the radius-of-curvature r of chase of the said end and this array pitch P is between 1/50 to 3/25, and said lenticule all has a height H; The depth-to-width ratio of this blast diffusion barrier is the ratio of this height H and this array pitch P, and this depth-to-width ratio is between 20% to 60%.
2. blast diffusion barrier according to claim 1 is characterized in that, this blast diffusion barrier is fit to be used in two opening in the occasion of piling up, and the radius-of-curvature r of chase of the said end is between 1.5 μ m to 7.0 μ m.
3. blast diffusion barrier according to claim 2 is characterized in that, this blast diffusion barrier is fit to be used in two opening in the occasion of piling up, and its depth-to-width ratio is between 37.5% to 48%.
4. blast diffusion barrier according to claim 3 is characterized in that, this array pitch P is between 30 μ m to 60 μ m.
5. blast diffusion barrier according to claim 1 is characterized in that, this blast diffusion barrier is fit to individual to be used respectively, and its depth-to-width ratio is between 34% to 55%.
6. blast diffusion barrier according to claim 5 is characterized in that, this array pitch P is between 30 μ m to 60 μ m.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910157614XA CN101963678B (en) | 2009-07-21 | 2009-07-21 | Brightening diffusion film |
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|---|---|---|---|
| CN200910157614XA CN101963678B (en) | 2009-07-21 | 2009-07-21 | Brightening diffusion film |
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| CN101963678B true CN101963678B (en) | 2012-06-13 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322613B (en) * | 2011-09-06 | 2013-01-16 | 无锡科依德光电科技有限公司 | LED illumination light intensification diffusion diaphragm system |
| CN109270610B (en) * | 2014-08-26 | 2021-07-09 | 友辉光电股份有限公司 | Method for forming concave-convex structure on substrate and method for manufacturing mold |
| CH711562A1 (en) * | 2015-09-24 | 2017-03-31 | Regent Beleuchtungskörper Ag | Optical film and luminaire with such. |
| JP6753660B2 (en) | 2015-10-02 | 2020-09-09 | デクセリアルズ株式会社 | Diffusing plate, display device, projection device and lighting device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002333509A (en) * | 2001-05-10 | 2002-11-22 | Keiwa Inc | Optical diffusion sheet and backlight unit using the same |
| CN1566994A (en) * | 2003-07-08 | 2005-01-19 | 财团法人工业技术研究院 | Mean optical module |
| CN1575963A (en) * | 2003-07-01 | 2005-02-09 | 日本板硝子株式会社 | Erecting resin lens array and method of manufacturing the same |
| TWI265318B (en) * | 2005-09-26 | 2006-11-01 | Ind Tech Res Inst | Optical diffuser |
-
2009
- 2009-07-21 CN CN200910157614XA patent/CN101963678B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002333509A (en) * | 2001-05-10 | 2002-11-22 | Keiwa Inc | Optical diffusion sheet and backlight unit using the same |
| CN1575963A (en) * | 2003-07-01 | 2005-02-09 | 日本板硝子株式会社 | Erecting resin lens array and method of manufacturing the same |
| CN1566994A (en) * | 2003-07-08 | 2005-01-19 | 财团法人工业技术研究院 | Mean optical module |
| TWI265318B (en) * | 2005-09-26 | 2006-11-01 | Ind Tech Res Inst | Optical diffuser |
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