US20070206298A1 - Optical film having multi-story and multi-peak prisms - Google Patents
Optical film having multi-story and multi-peak prisms Download PDFInfo
- Publication number
- US20070206298A1 US20070206298A1 US11/498,561 US49856106A US2007206298A1 US 20070206298 A1 US20070206298 A1 US 20070206298A1 US 49856106 A US49856106 A US 49856106A US 2007206298 A1 US2007206298 A1 US 2007206298A1
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- United States
- Prior art keywords
- prism
- basic
- parasitic
- optical film
- apex
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/04—Prisms
- G02B5/045—Prism arrays
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/04—Prisms
Definitions
- the optical film of the prior application as shown in FIG. 1 includes a plurality of prisms 6 juxtapositionally formed on a supporting layer 5 .
- Each prism 6 of the prior application includes: a lower prism element 61 integrally formed with the supporting layer 5 and having two lower dihedral faces 6 a , 6 b disposed on opposite sides of the lower prism element 61 and cooperatively defining a first apex angle ⁇ 1 between the two lower dihedral faces 6 a , 6 b ; and an upper prism element 62 integrally superimposed on the lower prism element 61 and having two upper dihedral faces 7 a , 7 b disposed on opposite sides of the upper prism element 62 and cooperatively defining a second apex angle ⁇ 2 between the two upper dihedral faces 7 a , 7 b ; with the two lower dihedral faces 6 a , 6 b forming a first apex E 1 , which is positioned below a second apex (E 2 ) as formed by the two upper dihedral faces 7 a , 7 b.
- the present inventor has made an improvement based upon the prior art by forming multi-peak and multi-story prisms on the supporting layer of the optical film.
- the object of the present invention is to provide an optical film comprising: a transparent supporting layer, and a plurality of multi-story prisms having multiple peaks formed thereon and juxtapositionally integrally formed on the supporting layer, each peak of the prism tapered or narrowed upwardly towards a light output direction for increasing a light concentrating effect of the prism in order to increase the brightness of the optical film.
- FIG. 1 shows an optical film of the prior art.
- FIG. 2 shows a first preferred embodiment of the present invention.
- FIG. 3 is a modification of the embodiment as shown in FIG. 2 .
- FIG. 4 shows another preferred embodiment of the present invention.
- FIG. 5 shows another modification based on the embodiment as shown in FIG. 2 .
- FIG. 6 shows further preferred embodiment of the present invention.
- FIG. 7 shows a modification based on the embodiment as shown in FIG. 6 .
- the optical film of the present invention comprises: a transparent supporting layer 1 , a basic prism 2 integrally formed on the supporting layer 1 , and at least a parasitic prism 3 integrally formed on the basic prism 2 .
- the basic prism 2 is formed by two basic dihedral faces 21 , 22 tapered upwardly towards a light output direction towards a viewer as generally indicated by numeral “L” as shown in FIG. 2 to define a first apex angle ⁇ 1 between the two dihedral faces 21 , 22 , which may be 104° or any other proper degrees, having the two basic dihedral faces 21 , 22 convergently intersected to form a first apex (or first peak) 23 on the top of the basic prism 2 .
- the parasitic prism 3 is formed by two parasitic dihedral faces 31 , 32 tapered upwardly to define a second apex angle ⁇ 2 , which may be a right angle or an acute angle, having the two parasitic dihedral faces 31 , 32 convergently intersected to form a second apex (or second peak) 33 on the top of the parasitic prism 3 .
- the second apex 33 is higher than the first apex 23 (H 2 >H 1 ) so that the parasitic prism 3 may absorb the incidence light projecting into the parasitic prism 3 to reduce light loss of the optical film. Meanwhile, the prism 3 is tapered or narrowed upwardly to enhance its light concentrating effect.
- the basic prism 2 and the parasitic prism 3 have two peaks 23 , 33 to thereby increase the brightness, luminance and luminous flux of the optical film, to be superior to the prior art.
- the prisms 2 , 3 may form two storys and there are two peaks (or two apexes). Accordingly, the present invention may be designated as an optical film having multi-story & multi-peak prisms.
- the transparent supporting layer 1 may be made of thermoplastic resin including polyethylene terephthalate (PET), polycarbonate (PC), etc.
- the prisms 2 , 3 may be made of photo-sensitive or photo-curable resin or thermosetting resin including UV-curable resin, which are formed on the supporting layer 1 by molding or printing process.
- one face of the two dihedral faces 21 , 22 has been formed as a curved surface 22 a .
- the curvature radius may be made as large as possible.
- Each of the dihedral faces of the prism may be formed as a flat or curved face, not limited in this invention.
- the second apex 33 is formed on a left side of the first apex 23 . However, the second apex 33 may also be positioned at the right side of the first apex 23 .
- the face 21 of the dihedral faces 21 , 22 as shown in FIG. 2 may also be formed as a curved surface (not shown). Or, both dihedral faces 21 , 22 may be formed as curved faces respectively.
- the optical film includes: a basic prism 2 integrally formed on the supporting layer 1 having a first apex 23 formed on a top of the basic prism 2 as convergently intersected by two basic dihedral faces 21 , 22 tapered upwardly for defining a first apex angle ⁇ 1 ; a first parasitic prism 3 integrally formed on the basic prism 2 having a second apex 33 formed on a top of the first parasitic prism 3 as convergently intersected by two parasitic dihedral faces 31 , 32 tapered upwardly for defining a second apex angle ⁇ 2 ; and a second parasitic prism 4 integrally formed on the basic prism 2 and juxtapositated opposite to the first parasitic prism 3 , having a third apex 43 formed on a top of the second parasitic prism 4 as convergently intersected by two parasitic dihedral faces 41 , 42 tapered upwardly for defining a
- the third apex 43 may be higher than the second apex 33 .
- the angle of each apex angle and the height of each apex is not limited in the present invention.
- At least one peak of the prisms should be the tallest among the peaks of the prisms in order to efficiently “catch” any incidence light projected inwardly from any external light sources or directions to prevent light loss of the optical film.
- the first apex 23 of the basic prism 2 is “sandwiched” in between the two apexes 33 , 43 of the two parasitic prisms 3 , 4 .
- the first apex 23 is coincidently located at the “valley” in between the two prisms 3 , 4 .
- the first apex 23 may also be protruded upwardly (not shown) to form triple peaks or apexes on a top portion of the basic prism 2 for increasing light concentrating effect of the optical film.
- the first apex 23 of the basic prism 2 as aforementioned has been modified to be a round peak or apex 23 a , which becomes a preferred embodiment of the present invention.
- the parasitic prism 3 has its dihedral faces 31 , 32 tapered upwardly respectively from the first apex 23 of the basic prism 2 and a right face 22 of the dihedral faces 21 , 22 of the basic prism 2 .
- the parasitic prism 3 is tapered upwardly to be narrower than the prism element ( 62 ) of the prior art as dotted line shown in FIG. 6 to increase its light concentrating effect of the optical film.
- the left face 21 of the dihedral faces 21 , 22 of the basic prism 2 as shown in FIG. 6 has now been modified to be a curved face 21 a and the right face 22 of the basic prism 2 has now been formed as a “base” of the parasitic prism 3 and been encompassed by the two dihedral faces 31 , 32 of the parasitic prism 3 .
- angles, shapes, heights, number of the prisms and peaks (or apexes) are not limited in the present invention.
- the number of storys of the prisms are also not limited.
- the multiple or plural parasitic prisms may be juxtapositionally formed on the basic prism 2 , or partially superimposed on the basic prism 2 to present multiple or plural peaks or apexes of the parasitic prisms formed on an upper or top portion of the basic prism 2 to increase the light concentrating effect of the optical film.
- the present invention also comprises a method by forming, molding or printing the structured layer or layers including the multiple parasitic prisms and multiple peaks of the parasitic prisms on the basic prism.
Abstract
An optical film comprises: a transparent supporting layer, and a plurality of multi-story prisms having multiple peaks formed thereon and juxtapositionally integrally formed on the supporting layer, each peak of the prism tapered or narrowed upwardly towards a light output direction for increasing a light concentrating effect of the prism in order to increase the brightness of the optical film.
Description
- This application is an improvement of the prior application also filed by the same inventor of this application.
- The prior application was filed on Mar. 3, 2006 given with an application Ser. No. 11/366,870, of which a typical drawing figure is attached herewith (as shown in
FIG. 1 ) of this application. - The optical film of the prior application as shown in
FIG. 1 includes a plurality ofprisms 6 juxtapositionally formed on a supportinglayer 5. - Each
prism 6 of the prior application includes: alower prism element 61 integrally formed with the supportinglayer 5 and having two lowerdihedral faces lower prism element 61 and cooperatively defining a first apex angle θ1 between the two lowerdihedral faces upper prism element 62 integrally superimposed on thelower prism element 61 and having two upperdihedral faces 7 a, 7 b disposed on opposite sides of theupper prism element 62 and cooperatively defining a second apex angle θ2 between the two upperdihedral faces 7 a, 7 b; with the two lowerdihedral faces dihedral faces 7 a, 7 b. - However, such a prior art has its first apex E1 superimposed and “concealed” under the second apex E2, thereby limiting a light concentrating effect of the
prism 6, and influencing the luminance, brightness and luminous flux of an optical film thus formed. - The present inventor has made an improvement based upon the prior art by forming multi-peak and multi-story prisms on the supporting layer of the optical film.
- The object of the present invention is to provide an optical film comprising: a transparent supporting layer, and a plurality of multi-story prisms having multiple peaks formed thereon and juxtapositionally integrally formed on the supporting layer, each peak of the prism tapered or narrowed upwardly towards a light output direction for increasing a light concentrating effect of the prism in order to increase the brightness of the optical film.
-
FIG. 1 shows an optical film of the prior art. -
FIG. 2 shows a first preferred embodiment of the present invention. -
FIG. 3 is a modification of the embodiment as shown inFIG. 2 . -
FIG. 4 shows another preferred embodiment of the present invention. -
FIG. 5 shows another modification based on the embodiment as shown inFIG. 2 . -
FIG. 6 shows further preferred embodiment of the present invention. -
FIG. 7 shows a modification based on the embodiment as shown inFIG. 6 . - As shown in
FIG. 2 , the optical film of the present invention comprises: a transparent supportinglayer 1, abasic prism 2 integrally formed on the supportinglayer 1, and at least aparasitic prism 3 integrally formed on thebasic prism 2. - The
basic prism 2 is formed by two basicdihedral faces FIG. 2 to define a first apex angle θ1 between the twodihedral faces dihedral faces basic prism 2. - The
parasitic prism 3 is formed by two parasiticdihedral faces dihedral faces parasitic prism 3. - The
second apex 33 is higher than the first apex 23 (H2>H1) so that theparasitic prism 3 may absorb the incidence light projecting into theparasitic prism 3 to reduce light loss of the optical film. Meanwhile, theprism 3 is tapered or narrowed upwardly to enhance its light concentrating effect. Thebasic prism 2 and theparasitic prism 3 have twopeaks - The
prisms - The transparent supporting
layer 1 may be made of thermoplastic resin including polyethylene terephthalate (PET), polycarbonate (PC), etc. - The
prisms layer 1 by molding or printing process. - As shown in
FIG. 3 , one face of the twodihedral faces curved surface 22 a. The curvature radius may be made as large as possible. - Each of the dihedral faces of the prism may be formed as a flat or curved face, not limited in this invention.
- The
second apex 33 is formed on a left side of thefirst apex 23. However, thesecond apex 33 may also be positioned at the right side of thefirst apex 23. - The
face 21 of thedihedral faces FIG. 2 may also be formed as a curved surface (not shown). Or, bothdihedral faces - As shown in
FIG. 4 , the optical film includes: abasic prism 2 integrally formed on the supportinglayer 1 having afirst apex 23 formed on a top of thebasic prism 2 as convergently intersected by two basicdihedral faces parasitic prism 3 integrally formed on thebasic prism 2 having asecond apex 33 formed on a top of the firstparasitic prism 3 as convergently intersected by two parasiticdihedral faces parasitic prism 4 integrally formed on thebasic prism 2 and juxtapositated opposite to the firstparasitic prism 3, having a third apex 43 formed on a top of the secondparasitic prism 4 as convergently intersected by two parasiticdihedral faces - The third apex 43 may be higher than the
second apex 33. Of course, the angle of each apex angle and the height of each apex is not limited in the present invention. - Preferably, at least one peak of the prisms should be the tallest among the peaks of the prisms in order to efficiently “catch” any incidence light projected inwardly from any external light sources or directions to prevent light loss of the optical film.
- The
first apex 23 of thebasic prism 2 is “sandwiched” in between the twoapexes 33, 43 of the twoparasitic prisms - As shown in
FIG. 4 , thefirst apex 23 is coincidently located at the “valley” in between the twoprisms first apex 23 may also be protruded upwardly (not shown) to form triple peaks or apexes on a top portion of thebasic prism 2 for increasing light concentrating effect of the optical film. - As shown in
FIG. 5 , thefirst apex 23 of thebasic prism 2 as aforementioned has been modified to be a round peak or apex 23 a, which becomes a preferred embodiment of the present invention. - As shown in
FIG. 6 , theparasitic prism 3 has itsdihedral faces first apex 23 of thebasic prism 2 and aright face 22 of thedihedral faces basic prism 2. Theparasitic prism 3 is tapered upwardly to be narrower than the prism element (62) of the prior art as dotted line shown inFIG. 6 to increase its light concentrating effect of the optical film. - As shown in
FIG. 7 , theleft face 21 of thedihedral faces basic prism 2 as shown inFIG. 6 has now been modified to be acurved face 21 a and theright face 22 of thebasic prism 2 has now been formed as a “base” of theparasitic prism 3 and been encompassed by the twodihedral faces parasitic prism 3. This is a further modification based on the embodiment as shown inFIG. 6 . - The angles, shapes, heights, number of the prisms and peaks (or apexes) are not limited in the present invention. The number of storys of the prisms are also not limited.
- The multiple or plural parasitic prisms may be juxtapositionally formed on the
basic prism 2, or partially superimposed on thebasic prism 2 to present multiple or plural peaks or apexes of the parasitic prisms formed on an upper or top portion of thebasic prism 2 to increase the light concentrating effect of the optical film. - The present invention also comprises a method by forming, molding or printing the structured layer or layers including the multiple parasitic prisms and multiple peaks of the parasitic prisms on the basic prism.
- The present invention may be modified without departing from the spirit and scope of the present invention.
Claims (7)
1. An optical film comprising:
a transparent supporting layer;
a basic prism integrally formed on said supporting layer and having two basic dihedral faces of said basic prism tapered upwardly from said supporting layer to define a first apex angle between the two basic dihedral faces and to form a first apex or peak on a top of said basic prism as convergently intersected by the two basic dihedral faces; and
at least a parasitic prism integrally formed on said basic prism and having two parasitic dihedral faces of said parasitic prism tapered upwardly from one face of said two basic dihedral faces of said basic prism to define a second apex angle between said two parasitic dihedral faces and to form a second apex or peak on a top of said parasitic prism to be juxtapositioned to said first apex of said basic prism for forming multiple peaks above an upper or top portion of said basic prism for increasing a light concentrating effect.
2. An optical film according to claim 1 , wherein each said peak of said prism is formed as a round peak.
3. An optical film according to claim 1 , wherein each said face of said dihedral faces of the prism is selected from a flat face and a curved face.
4. An optical film according to claim 1 , wherein said prisms include at least a peak which is the tallest among the multiple peaks of said prisms.
5. An optical film according to claim 1 , wherein one said parasitic prism includes said two parasitic dihedral faces tapered upwardly respectively from said apex of said basic prism and from one face of said two basic dihedral faces of said basic prism.
6. An optical film according to claim 1 , wherein said parasitic prism is tapered and narrowed upwardly towards a light output direction.
7. A process for making the optical film as set forth in claim 1 by integrally forming, molding or printing at least one said parasitic prism on said basic prism integrally formed on said supporting layer.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/498,561 US20070206298A1 (en) | 2006-03-03 | 2006-08-04 | Optical film having multi-story and multi-peak prisms |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/366,870 US7529048B2 (en) | 2006-03-03 | 2006-03-03 | Optical film having multi-story prisms and manufacturing process thereof |
US11/498,561 US20070206298A1 (en) | 2006-03-03 | 2006-08-04 | Optical film having multi-story and multi-peak prisms |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/366,870 Continuation US7529048B2 (en) | 2006-03-03 | 2006-03-03 | Optical film having multi-story prisms and manufacturing process thereof |
Publications (1)
Publication Number | Publication Date |
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US20070206298A1 true US20070206298A1 (en) | 2007-09-06 |
Family
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Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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US11/366,870 Expired - Fee Related US7529048B2 (en) | 2006-03-03 | 2006-03-03 | Optical film having multi-story prisms and manufacturing process thereof |
US11/498,561 Abandoned US20070206298A1 (en) | 2006-03-03 | 2006-08-04 | Optical film having multi-story and multi-peak prisms |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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US11/366,870 Expired - Fee Related US7529048B2 (en) | 2006-03-03 | 2006-03-03 | Optical film having multi-story prisms and manufacturing process thereof |
Country Status (3)
Country | Link |
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US (2) | US7529048B2 (en) |
JP (1) | JP2007241279A (en) |
KR (1) | KR20070090796A (en) |
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WO2009146055A2 (en) * | 2008-04-02 | 2009-12-03 | 3M Innovative Properties Company | Methods and systems for fabricating optical films having superimposed features |
WO2009146055A3 (en) * | 2008-04-02 | 2010-01-28 | 3M Innovative Properties Company | Methods and systems for fabricating optical films having superimposed features |
CN102016656A (en) * | 2008-04-02 | 2011-04-13 | 3M创新有限公司 | Methods and systems for fabricating optical films having superimposed features |
US9810817B2 (en) | 2008-04-02 | 2017-11-07 | 3M Innovative Properties Company | Light directing film and method for making the same |
US10197713B2 (en) | 2008-04-02 | 2019-02-05 | 3M Innovative Properties Company | Light directing film and method for making the same |
CN102305955A (en) * | 2011-08-30 | 2012-01-04 | 明基材料有限公司 | Phase difference film, roller used for manufacturing phase difference film and manufacturing method for roller |
WO2013045055A1 (en) * | 2011-09-30 | 2013-04-04 | Giesecke & Devrient Gmbh | Security element comprising a plurality of optically variable structures |
US9669647B2 (en) | 2011-09-30 | 2017-06-06 | Giesecke & Devrient Gmbh | Security element comprising a plurality of optically variable structures |
Also Published As
Publication number | Publication date |
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JP2007241279A (en) | 2007-09-20 |
US7529048B2 (en) | 2009-05-05 |
KR20070090796A (en) | 2007-09-06 |
US20070206913A1 (en) | 2007-09-06 |
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