3D lens and manufacturing method therefor

Abstract

The present invention relates to a 3D lens and a manufacturing method therefor. The 3D lens comprises a transparent plate and a plurality of cylindrical microlenses arranged on the upper surface of the transparent plate, wherein the cylindrical microlenses each extend in a first axial direction and are arranged in a grid pattern in a second axial direction; a spacing zone is provided between two adjacent cylindrical microlenses, a light-shielding strip is provided in each of the spacing zones, there is an overlapping area between the light-shielding strip and the adjacent cylindrical microlens, and the light-shielding strip is disposed at the bottom of the cylindrical microlens in the overlapping area; the cross section of each cylindrical microlens in the second axial direction has a first profile curve, and the cross section of each light-shielding strip in the second axial direction has a second profile curve; the edge of the first profile curve is located on either side of the second profile curve; and at the edge of the first profile curve, the angle of inclination of the second profile curve is in the range of 5° to 20°. The present invention can not only solve the problem of optical crosstalk of the adjacent cylindrical microlenses, but can also improve the degree of refinement of the microlenses, and achieve high thickness uniformity of different cylindrical microlenses, thereby facilitating an improvement in the 3D imaging effect of the 3D lens.

Description

A 3D lens and a manufacturing method thereof Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a 3D lens and a manufacturing method thereof. Background Art

[0002] In order to realize a stereoscopic display with naked-eye 3D function, a 3D lens is often set in front of a display (such as a liquid crystal display). It generally includes a transparent plate and a plurality of micro-lenticular lenses arranged side by side on the surface of the transparent plate. When the display image is in the focal plane of the micro-lenticular lenses, the micro-lenticular lenses can project pixels at different positions (which can be divided into left pixels and right pixels) in different directions. Therefore, when the viewer watches, the content displayed by the pixels at different positions can enter the viewer's left and right eyes respectively, thereby realizing a 3D visual effect.

[0003] At present, this type of 3D lens is generally manufactured by the embossing method. Generally, a micro-cylindrical lens embossing mold is first prepared, and then a transparent glue (such as photosensitive resin) is applied to a transparent plate, and then the embossing mold is used for pressing and forming. However, the 3D lens manufactured by this embossing method has the following problems: (1) The problem of micro-cylindrical lens refinement: Since the embossing mold is processed by a mechanical method, it is easy to have insufficient refinement, which ultimately affects the 3D imaging effect of the 3D lens; (2) The problem of mutual interference between adjacent micro-cylindrical lenses: Since the embossing method cannot cut different micro-cylindrical lenses, that is, the adjacent micro-cylindrical lenses are connected after cutting, resulting in serious interference at the edge positions of adjacent micro-cylindrical lenses. It is necessary to use more pixel isolation (that is, display the pixels corresponding to the edge as black) in the display to solve this problem. This method has a greater adverse effect on the display resolution; (3) The problem of inconsistent thickness of micro-cylindrical lenses: Since the embossing method is used, the overall thickness of the embossing layer produced in batches is not consistent, and the focus of the micro-cylindrical lenses fluctuates relative to the lens. When the product is assembled in batches, it is almost impossible to focus accurately. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a 3D lens and a manufacturing method thereof, which can not only solve the problem of optical crosstalk between adjacent micro-lenticular lenses, but also improve the refinement of the micro-lenses and make the thickness of different micro-lenticular lenses highly consistent, which is conducive to improving the 3D imaging effect of the 3D lens. The technical solution adopted is as follows:

[0005] A 3D lens comprises a transparent plate and a plurality of micro-lenticular lenses arranged on a surface of the transparent plate, characterized in that: each of the micro-lenticular lenses is formed by exposing and developing a transparent photosensitive resin coating; each of the micro-lenticular lenses extends along a first axial direction and is arranged in a grid-like manner along a second axial direction, the second axial direction being orthogonal to the first axial direction; a spacer is provided between two adjacent micro-lenticular lenses, each spacer is provided with a light-shielding strip, and there is an overlapping area between the light-shielding strip and the adjacent micro-lenticular lens, and the light-shielding strip is provided at the bottom of the micro-lenticular lens in the overlapping area; a cross-section of the micro-lenticular lens along the second axial direction has a first contour curve, which is a convex contour curve; a cross-section of the light-shielding strip along the second axial direction has a second contour curve, which is a convex contour curve with two sides inclined downward; the edges of the first contour curve are located on both sides of the second contour curve; and the inclination angle of the second contour curve at the edge of the first contour curve is 5 to 20 degrees.

[0006] The micro-cylindrical lenses generally constitute convex lenticular lenses. The micro-cylindrical lenses extend along a first axial direction, generally meaning that the micro-cylindrical lenses extend from one side of the transparent plate to the other side. When the transparent plate is square, the first axial direction may have a certain angle with the side of the transparent plate. The first contour curve is a convex contour curve, specifically, it may be an arc segment close to the top of a circular arc or parabola. The micro-cylindrical lenses are generally arranged in a grid shape along a second axial direction, generally being arranged side by side with a certain spacing along the second axial direction.

[0007] In the structure of the above-mentioned 3D lens, since each micro-cylinder is made of a photosensitive resin coating through exposure and development, its degree of refinement is very high; the thickness of each micro-cylinder can be guaranteed by a precise coating process such as slit-coating, so that the thickness tolerance of different micro-cylinders can be within ±0.1μm, and the horizontal pattern tolerance can reach within ±1μm, thereby making the thickness of different micro-cylinders highly consistent, improving the 3D imaging effect of the 3D lens; there is a spacer between two adjacent micro-cylinders, and the spacer is used to separate the two adjacent micro-cylinders, thereby blocking the refraction of light between the two adjacent micro-cylinders and solving the problem of optical crosstalk between adjacent micro-cylinders; a light-shielding strip is provided in the spacer, which can better distinguish adjacent micro-cylinders and can also block the light transmitted by the spacer, so that light only passes through each micro-cylinder. The 3D imaging of the 3D lens is clearer because the shading strip and the adjacent micro-lenticular lenses pass through the shading strip. There is an overlapping area between the shading strip and the adjacent micro-lenticular lenses. The shading strip is placed at the bottom of the micro-lenticular lenses in the overlapping area. As a result, the shading strip can block the edge of the adjacent micro-lenticular lenses, so that light can only pass through the main area in the middle of the micro-lenticular lenses. This can avoid the occurrence of stray light transmission of the micro-lenticular lenses due to edge deformation of the micro-lenticular lenses (such as edge jaggedness and edge curvature deviation), making the 3D imaging of the 3D lens clearer. At the edge of the first contour curve, the inclination angle of the second contour curve is 5 to 20 degrees. By setting the second contour curve of the shading strip in an inclined manner, the angle between the edge of the first contour curve of the micro-lenticular lens and the surface of the transparent plate can be made smaller, thereby making the curvature change of the first contour curve smoother and the imaging effect better.

[0008] The transparent plate can be made of a transparent glass plate, a plastic plate, or a plastic film. As a preferred embodiment of the present invention, the transparent plate is a transparent glass plate. Specifically, the transparent plate can be a glass plate with a thickness of 0.2 to 2.0 mm. This improves the flatness of the transparent plate and enhances the focus consistency of the micro-cylindrical lenses.

[0009] As a preferred embodiment of the present invention, the width of the micro-pillar is 180-220 μm and the height of the micro-pillar is 8-12 μm. The micro-pillars with the above width and height can have a relatively ideal first contour curve.

[0010] As a preferred embodiment of the present invention, the shading strip is formed by exposing and developing a black or dark photosensitive resin coating, and the second contour curve is formed by a gradual change in the amount of dissolution of the shading strip from its edge to its middle during the development process.

[0011] As a preferred embodiment of the present invention, the width of the light-shielding strip is 20-25 μm; the height of the light-shielding strip is 1.5-2 μm. Generally, the width of the spacer is slightly smaller than the width of the light-shielding strip, and the light-shielding strip at least fully covers the spacer. Using light-shielding strips of the above width and height can reduce their adverse effects on the micro-lenticular lenses.

[0012] As a preferred embodiment of the present invention, at the edge of the first contour curve, the angle formed between the first contour curve and the upper surface of the transparent plate is 5 to 10 degrees. Thus, by tilting the second contour curve, the angle formed between the first contour curve and the transparent plate surface at the edge of the first contour curve can be made smaller, thereby making the curvature of the first contour curve change more gradually and achieving better imaging effects.

[0013] The present invention also provides a method for manufacturing the above-mentioned 3D lens, characterized by comprising the following steps:

[0014] (1) a plurality of light-shielding strips arranged in a grid-like manner and spaced apart along the second axis are first provided on the upper surface of the transparent plate, and a transparent photosensitive resin coating is then applied to the upper surface of the transparent plate and each of the light-shielding strips;

[0015] (2) providing a mask plate, the mask plate having strip-shaped light-transmitting areas and strip-shaped light-shielding areas arranged alternately in a grid shape, each strip-shaped light-shielding area constituting a mask pattern; then, under the cover of the mask plate, ultraviolet light irradiated by an ultraviolet light source is exposed to the transparent photosensitive resin coating, the ultraviolet light irradiates the photosensitive resin coating through the strip-shaped light-transmitting areas, while the strip-shaped light-shielding areas block the ultraviolet light, thereby forming a grid-shaped exposure pattern, so that different parts of the transparent photosensitive resin coating are exposed to different amounts of ultraviolet light;

[0016] (3) The exposed photosensitive resin coating is developed, thereby forming a plurality of micro-cylinders on the upper surface of the transparent plate, which extend along a first axis and are arranged in a grid shape along a second axis. The second axis is orthogonal to the first axis, and a spacing area is formed between two adjacent micro-cylinders. Each shading strip is located in a corresponding spacing area. There is an overlapping area between the shading strip and the adjacent micro-cylinder, and the shading strip is placed at the bottom of the micro-cylinder in the overlapping area. The cross-section of the micro-cylinder in the second axis has a first contour curve and a second contour curve. The first contour curve is a convex contour curve. The second contour curve is formed by a gradual change in the amount of dissolution of the shading strip from its edge to its middle during the development process. The second contour curve is a convex contour curve with both sides tilted downward. The edges of the first contour curve are located on both sides of the second contour curve. At the edge of the first contour curve, the inclination angle of the second contour curve is 5 to 20 degrees.

[0017] In the above manufacturing method, in step (1), the transparent photosensitive resin coating can be selected from a negative photosensitive resin whose solubility in a developer decreases after being irradiated with ultraviolet light. The photosensitive resin coating can be coated by a slit coating technique to ensure that the thickness of the photosensitive resin coating has good consistency. The thickness of the photosensitive resin coating can be controlled to be 8 to 15 μm, and its thickness variation can be controlled within ±0.1 μm. After the photosensitive resin coating is coated and formed into a film, it can be subjected to a pre-baking process to be initially cured. In step (2), ultraviolet light is irradiated to the photosensitive resin layer through the strip-shaped light-transmitting area, while the strip-shaped light-shielding area blocks the ultraviolet light, thereby forming a grating exposure pattern, so that the area less irradiated by ultraviolet light has a higher solubility in the developer to form a spacer, and the area more irradiated by ultraviolet light has a lower solubility in the developer. The solubility is low to form multiple micro-columns (i.e., shaped lens areas); in the step (3), the exposed photosensitive resin coating can be developed by immersing it in a developer; when the photosensitive resin coating is a negative photosensitive resin, the design of the mask plate makes it possible for the spacer area to be exposed to less ultraviolet light and have a higher solubility in the developer, while the lens area (i.e., the area where multiple micro-columns are formed) is exposed to more ultraviolet light and has a lower solubility in the developer; there is an overlapping area between the shading strip and the adjacent micro-columns, and the shading strip is arranged at the bottom of the micro-columns in the overlapping area, thereby enabling the shading strip to block the edge of the adjacent micro-columns, so that light can only pass through the main area in the middle of the micro-columns, thereby avoiding the occurrence of stray light transmission of the micro-columns due to edge deformation of the micro-columns (such as edge serrations, edge curvature deviation), making the 3D imaging of the 3D lens clearer.

[0018] As a preferred embodiment of the present invention, step (2) includes (2-1) overlapping a mask plate on a photosensitive resin coating, with a fixed gap of 5 to 100 μm between the mask pattern of the mask plate and the photosensitive resin coating; and (2-2) scanning ultraviolet light emitted by an ultraviolet light source over the mask pattern of the mask plate to expose the photosensitive resin coating, so that different portions of the photosensitive resin coating receive different amounts of ultraviolet light exposure. Thus, a gradual change in exposure (gradually decreasing) from the center to the edge of the micro-cylindrical lens can be achieved, and the solubility of the photosensitive resin coating can also gradually change (gradually increasing), ultimately resulting in an arc shape with a thick center and thin edges.

[0019] As a further preferred embodiment of the present invention, in step (2-2), the ultraviolet light source is a divergent light source, and is scanned over the mask pattern of the mask plate in a direction non-parallel to the first axis.

[0020] As a further preferred embodiment of the present invention, in step (2-2), a lampshade is provided outside the UV light source, and the lampshade has an opening. The UV light emitted by the UV light source is emitted through the opening in the lampshade at a divergence angle of a corresponding arc, thereby exposing the photosensitive resin coating under the cover of the mask. By positioning the lampshade at the divergence angle outside the divergence light source and providing an opening with a certain arc angle in the lampshade, the photosensitive resin coating can be shielded from the corresponding arc. This can affect the gradual change in exposure during the above process, achieve adjustment of the arc of the first contour curve of the microcylindrical lens, and obtain a first contour curve of the corresponding arc.

[0021] As a preferred embodiment of the present invention, the width of the light shielding strip in step (1) is 20 to 25 μm; the height of the light shielding strip is 1.5 to 2 μm. Generally, the width of the spacer is slightly smaller than the width of the light shielding strip, and the light shielding strip at least fully covers the spacer. Using a light shielding strip of the aforementioned width and height can reduce its adverse effects on the micro-cylindrical lens.

[0022] As a preferred embodiment of the present invention, the process of setting a plurality of shading strips on the upper surface of the transparent plate in step (1) includes: S1 coating a black or dark photosensitive resin coating on the upper surface of the transparent plate; S2 exposing the black or dark photosensitive resin coating to ultraviolet light through an ultraviolet light source under the cover of a mask plate, so that different parts of the black or dark photosensitive resin coating are exposed to different amounts of ultraviolet light; S3 developing the exposed black or dark photosensitive resin coating, thereby forming a plurality of shading strips on the surface of the transparent plate that are arranged in a grid-like manner and alternately along a second axial direction, and the cross-section of the shading strips in the second axial direction has a second contour curve, and the second contour curve is formed by the gradual change in the amount of dissolution of the shading strips from the edge to the middle during the development process. The black or dark photosensitive resin coating can be formed by adding black or dark pigments, such as carbon powder, black or dark dyes, to the transparent photosensitive resin coating. By forming a shading strip in the spacer area, adjacent micro-columns can be better distinguished, and the shading strip can also block the light transmitted through the spacer area, so that light only passes through each micro-column, making the 3D imaging of the 3D lens clearer.

[0023] As a preferred embodiment of the present invention, at the edge of the first contour curve, the angle formed between the first contour curve and the upper surface of the transparent plate is 5 to 10 degrees. Thus, by tilting the second contour curve, the angle between the edge of the first contour curve and the transparent plate surface can be made smaller, thereby making the curvature of the first contour curve change more gradually and achieving better imaging effects.

[0024] As a preferred embodiment of the present invention, the width of the micro-pillar in step (3) is 180-220 μm; the height of the micro-pillar is 8-12 μm. The micro-pillars with the above width and height can have a relatively ideal first contour curve.

[0025] As a preferred embodiment of the present invention, in step (3), after the transparent photosensitive resin coating is developed, each micro-cylindrical lens is softened and its surface is liquefied by heating and baking, thereby finally obtaining a smoother gradient arc surface.

[0026] Compared with the prior art, the 3D lens of the present invention has the following advantages:

[0027] (1) In this 3D lens, since each micro-cylindrical lens is made of a photosensitive resin coating through exposure and development, its degree of refinement is very high; the thickness of each micro-cylindrical lens can be guaranteed by a precise coating process such as slit-coating, so that the thickness tolerance of different micro-cylindrical lenses can be within ±0.1μm, and the horizontal pattern tolerance can reach within ±1μm, thereby improving the refinement of the micro-lens and making the thickness of different micro-cylindrical lenses highly consistent, thereby improving the 3D imaging effect of the 3D lens;

[0028] (2) There is a spacer between two adjacent micro-cylinders in this 3D lens. The spacer is used to separate the two adjacent micro-cylinders, thereby blocking the refraction of light between the two adjacent micro-cylinders and solving the problem of optical crosstalk between adjacent micro-cylinders. By setting a light-shielding strip in the spacer, the adjacent micro-cylinders can be better distinguished, and the light transmission of the spacer can be blocked, so that the light only passes through each micro-cylinder, making the 3D imaging of the 3D lens clearer.

[0029] (3) In this 3D lens, there is an overlapping area between the shading strip and the adjacent micro-cylindrical lens. The shading strip is placed at the bottom of the micro-cylindrical lens in the overlapping area, so that the shading strip can block the edge of the adjacent micro-cylindrical lens, so that light can only pass through the main area in the middle of the micro-cylindrical lens. This can avoid the occurrence of stray light transmission of the micro-cylindrical lens due to edge deformation of the micro-cylindrical lens (such as edge serrations, edge curvature deviation), making the 3D imaging of the 3D lens clearer. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] FIG1 is a plan view of a 3D lens provided in Example 1 of a preferred embodiment of the present invention.

[0031] FIG2 is a schematic cross-sectional view of the micro-cylindrical lens in Example 1 of the preferred embodiment of the present invention along the second axis.

[0032] FIG3 is an enlarged view of point A in FIG2 .

[0033] FIG4 is a process schematic diagram of step (2) in the manufacturing method provided in Example 1 of the preferred embodiment of the present invention.

[0034] FIG5 is a schematic diagram of step (2) of the manufacturing method provided in Example 2 of the preferred embodiment of the present invention, wherein the ultraviolet light source is shielded by a lampshade with openings of different curvatures to adjust the curvature of the first contour curve. DETAILED DESCRIPTION

[0035] Example 1

[0036] As shown in Figures 1-4, this 3D lens includes a transparent plate 1 and a plurality of micro-lenticular lenses 2 disposed on the upper surface of the transparent plate 1. Each micro-lenticular lens 2 is formed by exposing and developing a transparent photosensitive resin coating 20. Each micro-lenticular lens 2 extends along a first axis 101 and is arranged in a grid pattern along a second axis 102, with the second axis 102 being orthogonal to the first axis 101. A spacer 21 is provided between two adjacent micro-lenticular lenses 2. A light-shielding strip 3 is provided in the spacer 21. There is an overlapping area 3 between the light-shielding strip 3 and the adjacent micro-lenticular lenses 2. 1. In the overlapping region 31, the light-shielding strip 3 is placed under the bottom of the micro-lenticular lens 2. The cross-section of the micro-lenticular lens 2 along the second axial direction 102 has a first contour curve 22, which is a convex contour curve. The cross-section of the light-shielding strip 3 along the second axial direction 102 has a second contour curve 32, which is a convex contour curve with both sides inclined downward. The edges of the first contour curve 22 are located on both sides of the second contour curve 32. At the edges of the first contour curve 22, the inclination angle of the second contour curve 32 is 5 to 20 degrees.

[0037] In this embodiment, the transparent plate 1 may be a transparent glass plate with a thickness of 0.2 to 2.0 mm, thereby making the transparent plate 1 more flat and the focus consistency of the micro-cylindrical lenses 2 better.

[0038] In this embodiment, the width of the micro-lenticular lens 2 is 180-220 μm, and the height of the micro-lenticular lens 2 is 8-12 μm. Producing the micro-lenticular lens 2 with the above width and height can make the micro-lenticular lens 2 have a relatively ideal first contour curve 22.

[0039] In this embodiment, the width of the light shielding strip 3 is 20-25 μm; the height of the light shielding strip 3 is 1.5-2 μm. The width of the spacer 21 is slightly smaller than the width of the light shielding strip 3, and the light shielding strip 3 at least fully covers the spacer 21. Using the light shielding strip 3 of the above width and height can reduce the adverse effects of the light shielding strip 3 on the micro-lenticular lens 2.

[0040] This embodiment also provides a method for manufacturing the 3D lens, comprising the following steps:

[0041] (1) First, a plurality of light-shielding strips 3 are arranged in a grid-like manner and alternately along the second axial direction 102 on the upper surface of the transparent plate 1, and then a transparent photosensitive resin coating 20 is applied to the upper surface of the transparent plate 1 and each of the light-shielding strips 3;

[0042] (2) providing a mask plate 40, wherein the mask plate 40 has strip-shaped light-transmitting areas 401 and strip-shaped light-shielding areas 402 arranged alternately in a grating shape, wherein each strip-shaped light-shielding area 402 constitutes a mask pattern of the mask plate 40; then, under the cover of the mask plate 40, ultraviolet light is irradiated by an ultraviolet light source 50 to expose the transparent photosensitive resin coating 20, wherein the ultraviolet light irradiates the photosensitive resin coating 20 through the strip-shaped light-transmitting areas 401, while the strip-shaped light-shielding areas 402 block the ultraviolet light, thereby forming a grating exposure pattern, so that different portions of the transparent photosensitive resin coating 20 are exposed to different amounts of ultraviolet light;

[0043] (3) Developing the exposed photosensitive resin coating 20 by immersing it in a developer, thereby forming a plurality of micro-cylindrical lenses 2 extending along a first axial direction 101 and arranged in a grid-like manner along a second axial direction 102 on the upper surface of the transparent plate 1. The second axial direction 102 is orthogonal to the first axial direction 101, and a spacing area 21 is formed between two adjacent micro-cylindrical lenses. Each shading strip 3 is located in a corresponding spacing area 21. There is an overlapping area 31 between the shading strip 3 and the adjacent micro-cylindrical lens 2. The shading strip 3 is placed at the bottom of the micro-cylindrical lens 2 in the overlapping area 31. The cross-section of the micro-cylindrical lens 2 along the second axial direction 102 has a first contour curve 22, which is a convex contour curve. The cross-section of the light-shielding strip 3 along the second axial direction 102 has a second contour curve 32, which is a convex contour curve with both sides tilted downward. The second contour curve 32 is formed by a gradual change in the amount of dissolution of the light-shielding strip 3 from its edge to its center during the development process. The edges of the first contour curve 22 are located on both sides of the second contour curve 32. At the edges of the first contour curve 22, the inclination angle of the second contour curve 32 is 5 to 20 degrees.

[0044] In this embodiment, in the step (1), the transparent photosensitive resin coating 20 is a negative photosensitive resin whose solubility in the developer decreases after being irradiated by ultraviolet light. The photosensitive resin coating 20 can be coated by a slit coating technique to ensure that the thickness of the photosensitive resin coating 20 has good consistency. The thickness of the photosensitive resin coating 20 can be controlled to be 8 to 15 μm, and its thickness variation can be controlled within ±0.1 μm. After being coated and formed into a film, the photosensitive resin coating 20 can be subjected to a pre-baking process to be initially cured. When the photosensitive resin coating 20 is a negative photosensitive resin, the design of the mask plate 40 makes the spacer area 21 less exposed to ultraviolet light and has a higher solubility in the developer, while the lens area (i.e., the area where multiple micro-cylindrical lenses 2 are formed) is exposed to more ultraviolet light and has a lower solubility in the developer.

[0045] In this embodiment, in the step (1), the process of setting a plurality of shading strips 3 on the upper surface of the transparent plate 1 includes: S1 coating a black or dark photosensitive resin coating 30 on the upper surface of the transparent plate 1; S2 exposing the black or dark photosensitive resin coating 30 with ultraviolet light by an ultraviolet light source under the cover of a mask plate, so that different parts of the black or dark photosensitive resin coating 30 are exposed to different amounts of ultraviolet light; S3 developing the exposed black or dark photosensitive resin coating 30, thereby forming a plurality of shading strips 3 arranged in a grid shape and alternately along the second axial direction 102 on the surface of the transparent plate 1, and the cross-section of the shading strips 3 in the second axial direction 102 has a second contour curve 32, and the second contour curve 32 is formed by the gradual change in the amount of dissolution of the shading strips 3 from the edge to the middle during the development process. The black or dark photosensitive resin coating 30 can be formed by adding black or dark pigments, such as carbon powder, black or dark dyes, to a transparent photosensitive resin coating. By forming the shading strips 3 in the spacers 21, adjacent micro-lenticular lenses 2 can be better distinguished. The shading strips 3 can also block the light transmitted through the spacers 21, so that light only passes through each micro-lenticular lens 2, making the 3D imaging of the 3D lens clearer.

[0046] In this embodiment, the width of the light shielding strip 3 in step (1) is 20-25 μm; the height of the light shielding strip 3 is 1.5-2 μm. The width of the spacer 21 is slightly smaller than the width of the light shielding strip 3, and the light shielding strip 3 at least fully covers the spacer 21. The use of the light shielding strip 3 of the above width and height can reduce the adverse effects of the light shielding strip 3 on the micro-cylindrical lens 2.

[0047] In this embodiment, step (2) includes (2-1) overlapping the mask plate 40 on the photosensitive resin coating 20, and making a fixed interval of 5 to 100 μm between the mask pattern of the mask plate 40 and the photosensitive resin coating 20; (2-2) the ultraviolet light source 50 adopts a divergent light source, and scans over the mask pattern of the mask plate 40 in a direction non-parallel to the first axis 101 to expose the photosensitive resin coating 20, so that different parts of the photosensitive resin coating 20 are exposed to different amounts of ultraviolet light.

[0048] In this embodiment, the width of the micro-pillar 2 in step (3) is 180-220 μm; the height of the micro-pillar 2 is 8-12 μm. The micro-pillar 2 with the above width and height can be obtained so that the micro-pillar 2 has a relatively ideal first contour curve 22.

[0049] In this embodiment, in step (3), after the transparent photosensitive resin coating 20 is developed, each micro-cylindrical lens 2 is softened and its surface is liquefied by heating and baking, etc., and finally a smoother gradient arc surface is obtained; at the edge of the first contour curve 22, the angle between the first contour curve 22 and the surface of the transparent plate 1 is 5 to 10°.

[0050] Example 2

[0051] Referring to FIG. 5 , while all other aspects are identical to those of the first embodiment, the difference is that in this embodiment, in step (2-2), a lampshade 60 is provided on the outside of the ultraviolet light source 50, and an opening is provided in the lampshade 60. The ultraviolet light emitted by the ultraviolet light source 50 is emitted through the opening in the lampshade 60 at a divergence angle of a corresponding arc, thereby exposing the photosensitive resin coating 20 under the cover of the mask plate 40. By positioning the lampshade 60 at the divergence angle outside the ultraviolet light source 50 and providing an opening with a certain arc angle in the lampshade 60, the transparent photosensitive resin coating 20 can be shielded at a corresponding arc. This can affect the gradual change in exposure during the above process, adjust the arc of the first contour curve 22 of the micro-cylindrical lens 2, and obtain a first contour curve 22 of a corresponding arc.

[0052] In addition, it should be noted that the names of the various parts of the specific embodiments described in this specification may be different. Any equivalent or simple changes made based on the structure, features, and principles described in the patent concept of the present invention are included in the scope of protection of the patent of this invention. Those skilled in the art of the technical field to which the present invention relates may make various modifications, supplements, or replace the specific embodiments described in the description with similar methods. As long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, they shall fall within the scope of protection of the present invention.

Claims

1. A 3D lens comprising a transparent plate and a plurality of micro-cylindrical lenses disposed on a surface of the transparent plate, characterized in that: Each of the micro-cylinders is formed by exposing and developing a transparent photosensitive resin coating. Each micro-cylinder extends along a first axis and is arranged in a grid pattern along a second axis, with the second axis being orthogonal to the first axis. A spacer is provided between two adjacent micro-cylinders, each spacer being provided with a light-shielding strip. There is an overlapping area between the light-shielding strip and the adjacent micro-cylinder, and the light-shielding strip is provided at the bottom of the micro-cylinder in the overlapping area. The cross-section of the micro-cylinder along the second axis has a first contour curve, which is a convex contour curve. The cross-section of the light-shielding strip along the second axis has a second contour curve, which is a convex contour curve with both sides inclined downward. The edges of the first contour curve are located on both sides of the second contour curve. At the edges of the first contour curve, the inclination angle of the second contour curve is 5 to 20 degrees.

2. The 3D lens according to claim 1, wherein: The light-shielding strip is formed by exposing and developing a black or dark photosensitive resin coating, and the second contour curve is formed by a gradual change in the amount of dissolution of the light-shielding strip from its edge to its middle during the development process.

3. The 3D lens according to claim 1, wherein: The width of the micro-column is 180-220 μm; the height of the micro-column is 8-12 μm.

4. The 3D lens according to claim 1, wherein: The width of the light-shielding strip is 20-25 μm; the height of the light-shielding strip is 1.5-2 μm.

5. The 3D lens according to claim 1, wherein: At the edge of the first contour curve, the angle formed between the first contour curve and the upper surface of the transparent plate is 5 to 10 degrees.

6. A method for manufacturing a 3D lens, characterized in that The steps include: (1) a plurality of light-shielding strips arranged in a grid-like manner and spaced apart along the second axis are first provided on the upper surface of the transparent plate, and a transparent photosensitive resin coating is then applied to the upper surface of the transparent plate and each of the light-shielding strips; (2) providing a mask plate, the mask plate having strip-shaped light-transmitting areas and strip-shaped light-shielding areas arranged alternately in a grid shape, each strip-shaped light-shielding area constituting a mask pattern; then, under the cover of the mask plate, ultraviolet light irradiated by an ultraviolet light source is exposed to the transparent photosensitive resin coating, the ultraviolet light irradiates the photosensitive resin coating through the strip-shaped light-transmitting areas, while the strip-shaped light-shielding areas block the ultraviolet light, thereby forming a grid-shaped exposure pattern, so that different parts of the transparent photosensitive resin coating are exposed to different amounts of ultraviolet light; (3) The exposed photosensitive resin coating is developed, thereby forming a plurality of micro-cylinders on the upper surface of the transparent plate, which extend along a first axis and are arranged in a grid shape along a second axis. The second axis is orthogonal to the first axis, and a spacing area is formed between two adjacent micro-cylinders. Each shading strip is located in a corresponding spacing area. There is an overlapping area between the shading strip and the adjacent micro-cylinder, and the shading strip is placed at the bottom of the micro-cylinder in the overlapping area. The cross-section of the micro-cylinder in the second axis has a first contour curve and a second contour curve. The first contour curve is a convex contour curve. The second contour curve is formed by a gradual change in the amount of dissolution of the shading strip from its edge to its middle during the development process. The second contour curve is a convex contour curve with both sides tilted downward. The edges of the first contour curve are located on both sides of the second contour curve. At the edge of the first contour curve, the inclination angle of the second contour curve is 5 to 20 degrees.

7. The method for manufacturing a 3D lens according to claim 6, wherein: The step (2) includes (2-1) overlapping the mask plate on the photosensitive resin coating, and making a fixed interval of 5 to 100 μm between the mask pattern of the mask plate and the photosensitive resin coating; (2-2) using ultraviolet light emitted by an ultraviolet light source to scan the mask pattern of the mask plate to expose the photosensitive resin coating, so that different parts of the photosensitive resin coating are exposed to different amounts of ultraviolet light.

8. The method for manufacturing a 3D lens according to claim 7, wherein: In the step (2-2), the ultraviolet light source is a divergent light source, and is scanned over the mask pattern of the mask plate in a direction non-parallel to the first axis.

9. The method for manufacturing a 3D lens according to claim 7, wherein: A lampshade is provided outside the ultraviolet light source, and an opening is provided on the lampshade. The ultraviolet light emitted by the ultraviolet light source is emitted through the opening on the lampshade at a divergence angle of corresponding arc, and exposes the photosensitive resin coating under the cover of the mask plate.

10. The method for manufacturing a 3D lens according to claim 6, wherein: In the step (3), after the transparent photosensitive resin coating is developed, each micro-cylindrical lens is softened and its surface is liquefied by heating and baking, thereby finally obtaining a smoother gradient arc surface.

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