WO2007018064A1 - レンチキュラーレンズシート - Google Patents
レンチキュラーレンズシート Download PDFInfo
- Publication number
- WO2007018064A1 WO2007018064A1 PCT/JP2006/315131 JP2006315131W WO2007018064A1 WO 2007018064 A1 WO2007018064 A1 WO 2007018064A1 JP 2006315131 W JP2006315131 W JP 2006315131W WO 2007018064 A1 WO2007018064 A1 WO 2007018064A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lenticular lens
- sheet
- convex part
- convex
- lens sheet
- 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.)
- Ceased
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
- G02B3/0037—Arrays characterized by the distribution or form of lenses
- G02B3/005—Arrays characterized by the distribution or form of lenses arranged along a single direction only, e.g. lenticular sheets
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
- G02B3/0012—Arrays characterised by the manufacturing method
- G02B3/0031—Replication or moulding, e.g. hot embossing, UV-casting, injection moulding
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
- G02B3/0037—Arrays characterized by the distribution or form of lenses
- G02B3/0062—Stacked lens arrays, i.e. refractive surfaces arranged in at least two planes, without structurally separate optical elements in-between
- G02B3/0068—Stacked lens arrays, i.e. refractive surfaces arranged in at least two planes, without structurally separate optical elements in-between arranged in a single integral body or plate, e.g. laminates or hybrid structures with other optical elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/02—Simple or compound lenses with non-spherical faces
- G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
- G02B30/27—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving lenticular arrays
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/60—Projection screens characterised by the nature of the surface
- G03B21/62—Translucent screens
- G03B21/625—Lenticular translucent screens
Definitions
- the present invention relates to a lenticular lens sheet constituting a rear projection screen used in a rear projection television or the like.
- FIG. 1 is a cross-sectional view showing an example of the configuration of a rear projection screen.
- the rear projection screen 1 has a lenticular lens sheet 11, a Fresnel lens sheet 12, and a light shielding pattern 13.
- the lenticular lens sheet 11 is composed of a sheet in which the lenticular lens 110 is provided on the light incident surface side.
- the lenticular lens 110 is composed of a plurality of vertically long cylindrical lenses having a force-marrow shape, and they are arranged at equal intervals.
- the Fresnel lens sheet 12 also has a sheet force in which the Fresnel lens 120 is provided on the light exit surface.
- the Fresnel lens 120 is a lens arranged concentrically at a fine pitch at equal intervals.
- the light shielding pattern 13 is a light absorbing layer that also has black ink isotropic force, and is provided in a portion other than the light condensing portion by the lenticular lens 110.
- the lens sheets 11 and 12 are close to each other, thereby constituting a rear projection type screen 1.
- a rear projection projector (not shown) enters from the opposite side of the Fresnel lens 120.
- the incident light passes through the Fresnel lens sheet 12 and is emitted to the Fresnel lens 120 side.
- the emitted parallel light or convergent light is diffused greatly in the horizontal direction by the lenticular lens sheet 11. This makes it possible to observe an image with a wide visual field range in the horizontal direction.
- a light shielding layer pattern is formed on the exit surface to improve the external light contrast.
- a convex portion is provided on the exit surface side of the lenticular lens sheet, and the convex portion is Screen printing, roll printing, etc. are applied. This convex part needs to have a shape that does not block the image light emitted from the lenticular lens.
- a rear projection display apparatus using a liquid crystal display device (hereinafter referred to as LCD) or a digital micromirror device (hereinafter referred to as DMD) is also widely used.
- LCD liquid crystal display device
- DMD digital micromirror device
- the pitch of a lens array in a lenticular lens was 1 to 0.5 mm, etc. 1S
- a lenticular lens sheet with a pitch smaller than 0.5 mm has been demanded due to demands for finer images. .
- FIG. 2 is an example showing the relationship between the lens array pitch and the ink thickness.
- a lenticular lens having a shape as shown in Fig. 4 is manufactured by making the width of the light shielding layer 70% of the pitch and applying black ink by a roll coater. As shown in Fig. 2, it can be seen that when the pitch of the lenticular lens is decreased, the thickness of the ink is generally reduced and the contrast tends to decrease.
- FIG. 3 shows an example of the results of evaluating the ink application thickness and light transmittance.
- the ink coating thickness force is less than S4 m, the light transmittance increases rapidly. This means that the outside light cannot be absorbed sufficiently.
- carbon pigments are used as the light-shielding material in the ink.
- the mixing ratio of the pigment has an upper limit, so the thickness of the ink must be increased in order to obtain sufficient blackness. Increasing the size is important for improving the contrast.
- the ink thickness applied to the lenticular lens sheet is simply In the case of a lenticular lens having a conventional trapezoidal convex portion as shown in Fig. 4, the ink thickness at the top becomes excessive, which may cause a problem in ink curability.
- the ink thickness at the part indicated by the arrow in Fig. 4 may not be sufficiently thick, and the contrast improvement effect may not be obtained.
- Patent Document 2 discloses a fine-pitch printing method for transferring a light-shielding layer using adhesiveness. The process is complicated. In the transfer printing method, a protective film for the transfer sheet, a base film, and the like are required, and there is a problem that a lot of waste is generated.
- Patent Document 1 Japanese Utility Model Publication No. 59-87042
- Patent Document 2 JP-A-9-120101
- an object of the present invention is to provide a lenticular lens sheet that can easily form a light-shielding layer capable of exhibiting high contrast performance even when the pitch of the lens array in the lenticular lens is small. It is.
- the present invention for solving the problems includes a lens array composed of a plurality of cylindrical lenses on the incident surface side, a non-condensing part of the lens array has a convex part, and the convex part includes a light absorption layer. Further, the lens row pitch is less than 0.5 mm, the angle ⁇ 1 formed between the lowermost portion of the convex portion and the sheet main surface is 45 ° or more, and the convex portion
- the lenticular lens is characterized in that the apex force of the convex part larger than the angle 0 2 between the top part and the sheet main surface is 10 m or less in the sheet thickness direction, and the convex part width is 150 / zm or less. Sheet.
- the present invention is the lenticular lens sheet as described above, wherein a cross-sectional shape of a top portion of the convex portion is a part of a substantially circular shape.
- the present invention is the above lenticular lens sheet, wherein a curvature radius at a top of the convex part having a substantially circular cross-sectional shape is 1 mm or less.
- the present invention is the lenticular lens sheet described above, wherein an angle formed between a lowermost portion of the convex portion and a sheet main surface is 60 ° or more and less than 90 °.
- the apex force of the convex portion is such that the width of the convex portion at a position 10 m away in the sheet thickness direction is 80% or less with respect to the width of the lowermost portion of the convex portion.
- This is a lenticular lens sheet.
- the light-shielding layer formed on the convex portion of the lenticular lens can be formed sufficiently thick and uniformly by an easy means. Therefore, the external light contrast can be increased. Further, it can have a convex shape that does not block the image light emitted from the lenticular lens. In addition, since the thickness of the light shielding layer is not excessively increased, problems with ink curability are unlikely to occur. In addition, it is not necessary to change the shape of the lens because the shape of the convex portion only needs to be the shape of the present invention.
- FIG. 1 is a schematic configuration diagram of a rear projection screen.
- FIG. 2 is a diagram showing the relationship between the pitch of a lens array and the ink thickness in the prior art.
- FIG. 3 is a graph showing ink coating thickness and light transmittance.
- FIG. 4 is a diagram showing a cross-sectional shape of a convex portion in the prior art.
- FIG. 5 is a diagram showing a cross-sectional shape of a convex portion in one embodiment of the present invention.
- FIG. 6 is a diagram showing a cross-sectional shape of a convex portion in one embodiment of the present invention.
- FIG. 7 is a diagram showing a cross-sectional shape of a light shielding layer in one embodiment of the present invention.
- FIG. 8 is a diagram showing a cross-sectional shape of a light shielding layer in an embodiment of the present invention.
- FIG. 9 is a diagram for explaining the width of the top of the convex portion in the present invention.
- FIG. 10 is a diagram illustrating ⁇ 1 and ⁇ 2 in the present invention.
- FIG. 11 is a diagram showing a cross-sectional shape of a light shielding layer in the prior art.
- FIG. 12 is a view showing an embodiment for producing a lenticular lens sheet according to the present invention.
- FIG. 13 is a diagram showing the positions of protrusions and ink thicknesses according to examples and comparative examples of the present invention.
- FIG. 14 is a diagram showing a cross-sectional shape of a convex portion according to Examples 1 and 2 of the present invention.
- FIG. 15 is a view showing a cross-sectional shape of a convex portion according to Examples 3 and 4 of the present invention.
- the peak force at the convex portion is also defined by the width of the convex portion at a position 10 m away in the sheet thickness direction, as shown in FIG. This is the distance from point to point where a straight line parallel to the main surface of the sheet is drawn at a distance of 10 m and this straight line intersects with the cross section of the convex part. It was found that when the width A is larger than 150 m, as shown by the arrow in FIG. 11, the ink at the edge of the flat portion of the convex portion becomes thin and the contrast is lowered.
- ⁇ 1 is the angle formed by the convex slope at the bottom of the convex part and the sheet main surface
- ⁇ 2 is the angle formed by the top of the convex part and the sheet main surface.
- the main surface is a virtual plane parallel to the screen when the screen is a two-dimensional plane.
- FIG. 5 is a schematic view showing an example of the lenticular lens sheet of the present invention.
- the pitch of the lens rows in the lenticular lens sheet of this example is about 300 ⁇ m
- the length of the flat portion at the top of the convex light shielding portion is about 75 m.
- the ink applied to the convex top portion is rounded by surface tension.
- the flat portion has a short length, so that a portion where the ink thickness is thin does not occur and high contrast can be exhibited.
- FIG. 6 is a schematic diagram showing another example of the present invention.
- the pitch of the lenticular lens sheet in this example is about 300 m, which is the same as Fig. 5.
- the curvature radius of the convex top is about 0.2 mm.
- the width at 10 m from the top of the protrusion is about 125 m. It is.
- ⁇ 2 is 0. It is.
- the convex top has a specific rounded shape as described above, a portion having a thin ink thickness does not occur, and high contrast can be exhibited.
- any shape such as a polygon or a combination of a polygon and a curve can be used.
- the angle 0 1 formed between the lowermost part of the convex part in the first half and the sheet main surface is 60 ° or more.
- FIG. 7 shows an example of a lenticular lens sheet according to the present invention. In this example, 0 1 is set to 75 °. On the other hand, in the example shown in FIG. 8, 0 1 is 55 °. When the 0 1 force is less than 0 °, as shown in FIG. 8, the apparent thickness when the frontal force of the light shielding layer on the convex slope is viewed may be reduced.
- UV ink an ink based on an ultraviolet curable resin
- the effect of the present invention is remarkable.
- the thickness of the ink applied to the lenticular lens sheet as shown in Fig. 4 is simply increased, or if the concentration of the light absorbing material is simply increased, the problem of poor ink curing at the thick portion will occur.
- the lenticular lens sheet of the present invention can be applied with a uniform thickness without being too thin and not too thin.
- the proportion of the area where the thickness of the light shielding layer is 1 ⁇ m or more and 10 m or less can be 90% or more.
- the sectional shape of the convex portion means a shape when cut in a direction parallel to the arrangement direction of the lens rows and perpendicular to the sheet surface.
- the method for forming the lenticular lens sheet of the present invention is not particularly limited.
- extrusion molding, molding by ultraviolet curing resin, or the like may be used.
- the method for forming the light shielding layer of the lenticular lens sheet of the present invention is not particularly limited.
- roll printing screen printing, or the like can be used.
- roll printing is preferred in that it can be printed while forming a single lens sheet.
- the roll knife coater shown in Fig. 12 has a uniform coating thickness, and the slope of the convex part. Is particularly preferable in that it can be printed.
- a lenticular lens sheet having a convex portion having a substantially circular top portion and a part including a lowermost portion of the convex portion having a linear inclined surface was produced.
- the angle between the lowest part of the convex part and the sheet plane was 85 °.
- the width of the bottom of the convex part is 70% of the lens pitch.
- the pitches of the lenticular lenses of Examples 1 and 2 were 0.25 mm and 0.311 mm, respectively.
- the minimum curvature radii at the top of the convex portion were 0.148 mm and 0.187 mm, respectively, and the width at 10 m from the top of the convex portion was 103 m and 124 m, respectively.
- UV curable black ink was applied to the entire surface of the substantially circular convex portion.
- a lenticular lens having a flat part at the top, a part including the lowest part of the convex part is a straight inclined surface, and the middle part is a part of a substantially arc.
- the angle between the bottom of the convex part and the sheet plane is 85 °.
- the pitches of the lenticular lenses in Examples 3 and 4 are two types, 0.265 mm and 0.31 lmm.
- the width at 10 ⁇ m from the top of the convex part is 70 m and m, respectively.
- UV curable black ink is applied to the convex portions.
- the thickness of the ink applied to the convex portion after curing is approximately 11 m over the entire surface.
- Example 1 When the lenticular lens sheet of Example 1 is attached to a projection display device and an image is observed in a room where the illuminance of the screen surface is 360 lux, an image with excellent contrast can be viewed.
- the pitch of the lenticular lens is 0.15 mm
- a lenticular lens sheet was produced in the same manner as in Examples 1 and 2 except that the minimum curvature radius of the part was 0.063 mm.
- the width at 10 ⁇ m from the top of the convex part was 68 ⁇ m.
- ultraviolet curable black ink was applied to the entire surface of the substantially circular convex portion.
- a lenticular lens sheet having a convex portion having a substantially circular shape from the top to the bottom of the convex portion was produced.
- the angle between the lowest part of the convex part and the sheet plane was 54 °.
- the width of the lowest part of the convex part is 70% of the lens pitch.
- the pitch of the lenticular lens of Example 6 was set to 0.295 mm.
- the minimum radius of curvature at the top of the convex part was 0.118 mm, and the width at 10 m from the top of the convex part was 98 m.
- ultraviolet curable black ink was applied to the entire surface of the substantially circular convex portion.
- a lenticular lens sheet having a substantially trapezoidal convex portion as shown in FIG. 4 was produced.
- the angle between the bottom of the convex part and the sheet plane was 85 °.
- the pitches of the lenticular lenses of Comparative Examples 1 and 2 were 0.265 mm and 0.311 mm, respectively, and the width at 10 m from the top of the convex portion was 160 m and 190 / z m, respectively.
- ultraviolet curable black ink was applied to the trapezoidal convex portion.
- Table 1 shows an example of the result of measuring the scattering reflection luminance in front of the center of the lenticular lens sheet in the room where the above-mentioned image was observed in order to evaluate the contrast of the screen.
- the illuminance on the screen surface was 360 lux as in the visual evaluation.
- Example 1 0. 2 6 5 2. 8 8-2 4% Comparative Example 2 0. 3 1 1 3. 7 7 (Standard)
- Example 1 has a 24% improvement in scattered reflection luminance, ie, blackness, compared to the screen of Comparative Example 2.
- FIG. 13 shows an example of the measurement results of the ink thickness after curing.
- the horizontal axis shows the standardized value with the width of black ink applied as 1.
- the area applied to a thickness of 1 ⁇ m or more was about 96%, and there was no portion applied exceeding 10 m. . Therefore, there is a wide area where the coating is too thick to prevent ink curability.
- the area applied to a thickness of 1 ⁇ m or more was about 95%, and there was no portion applied exceeding 10 m. . Therefore, there is a wide area where the coating is too thick to prevent ink curability.
- the area applied to a thickness of 1 ⁇ m or more was about 84%, which was less powerful than the Example.
- the light-shielding layer formed on the convex portion of the lenticular lens is sufficiently thick and uniform by an easy means. Therefore, the external light contrast can be increased. Moreover, it can be set as the shape in which a convex part does not block outgoing light. Also, make the light shielding layer too thick. Because there is no problem with the curability of the ink!
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Overhead Projectors And Projection Screens (AREA)
- Liquid Crystal (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007529488A JPWO2007018064A1 (ja) | 2005-08-05 | 2006-07-31 | レンチキュラーレンズシート |
| US11/997,751 US20100220391A1 (en) | 2005-08-05 | 2006-07-31 | Lenticular lens sheet |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005228620 | 2005-08-05 | ||
| JP2005-228620 | 2005-08-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2007018064A1 true WO2007018064A1 (ja) | 2007-02-15 |
Family
ID=37727252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2006/315131 Ceased WO2007018064A1 (ja) | 2005-08-05 | 2006-07-31 | レンチキュラーレンズシート |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20100220391A1 (ja) |
| JP (1) | JPWO2007018064A1 (ja) |
| KR (1) | KR20080018279A (ja) |
| CN (1) | CN101238411A (ja) |
| TW (1) | TW200715038A (ja) |
| WO (1) | WO2007018064A1 (ja) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20250035283A1 (en) * | 2023-07-25 | 2025-01-30 | Flex-N-Gate Advanced Product Development, Llc | Masked Double-Sided Optical Sheet Lighting Assembly |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5987042U (ja) * | 1982-12-03 | 1984-06-12 | 大日本印刷株式会社 | レンチキユラ−レンズ板 |
| JP2005099371A (ja) * | 2003-09-24 | 2005-04-14 | Dainippon Printing Co Ltd | レンチキュラーレンズシートおよびその製造方法 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10239777A (ja) * | 1997-02-28 | 1998-09-11 | Kuraray Co Ltd | 背面投写型映像表示装置 |
| CN1473283A (zh) * | 2000-11-09 | 2004-02-04 | 大日本印刷株式会社 | 双凸透镜片和投影屏 |
| KR101174773B1 (ko) * | 2005-06-29 | 2012-08-20 | 엘지디스플레이 주식회사 | 프리즘 시트와 이를 이용한 백 라이트 유닛 및 프리즘시트의 제조방법 |
-
2006
- 2006-07-31 KR KR1020087002502A patent/KR20080018279A/ko not_active Ceased
- 2006-07-31 WO PCT/JP2006/315131 patent/WO2007018064A1/ja not_active Ceased
- 2006-07-31 CN CNA2006800292323A patent/CN101238411A/zh active Pending
- 2006-07-31 US US11/997,751 patent/US20100220391A1/en not_active Abandoned
- 2006-07-31 JP JP2007529488A patent/JPWO2007018064A1/ja active Pending
- 2006-08-04 TW TW095128569A patent/TW200715038A/zh unknown
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5987042U (ja) * | 1982-12-03 | 1984-06-12 | 大日本印刷株式会社 | レンチキユラ−レンズ板 |
| JP2005099371A (ja) * | 2003-09-24 | 2005-04-14 | Dainippon Printing Co Ltd | レンチキュラーレンズシートおよびその製造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20080018279A (ko) | 2008-02-27 |
| CN101238411A (zh) | 2008-08-06 |
| JPWO2007018064A1 (ja) | 2009-02-19 |
| US20100220391A1 (en) | 2010-09-02 |
| TW200715038A (en) | 2007-04-16 |
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