CN106646902A - Double cemented micro-cylindrical lens grating device employing naked 3D display and preparation method thereof - Google Patents

Abstract

The invention relates to a double-glued micro-pillar lens grating device for naked-eye 3D display, which is characterized in that it includes a substrate, a plano-convex lens grating array, a concave-convex lens grating array, and a filling layer; the plano-convex lens grating array is arranged on the upper surface of the substrate, and the The concave surface of the concave-convex lens grating array fits with the convex surface of the plano-convex lens grating array; the inner side of the filling layer covers the convex surface of the concave-convex lens grating array, and the outer side remains flat; the refraction of the plano-convex lens grating array and the concave-convex lens grating array The ratios are different, and the refractive index of the filling layer is smaller than the composite effective refractive index of the plano-convex lens grating array and the concave-convex lens grating array; the invention also relates to a preparation method. The invention has the effects of reducing the size of the red, green and blue three-color light diffuse spots, reducing the defocus size, increasing the intensity of the central light spot, reducing the degree of crosstalk, and improving the horizontal and axial resolutions.

Description

A double-glued microcylindrical lens grating device for naked-eye 3D display and its preparation method

technical field

The invention relates to a double-glued micro-pillar lens grating device for naked-eye 3D display and a preparation method thereof.

Background technique

With the advancement of digital image processing technology and equipment manufacturing level, 3D display has become a popular trend in the display industry. The lenticular lens grating LCD screen is a kind of naked-eye 3D display, but it has the disadvantages of high crosstalk, few viewpoints, and the definition needs to be improved. The principle of the lens array is to use the spectroscopic principle of the cylindrical lens grating unit to refract the light of two parallax images at different positions on the focal plane to two different directions, so that the left and right eyes of the viewer see two different images respectively, resulting in a sense of parallax , which are fused in the brain through optic nerve conduction to generate a stereoscopic image. This type of naked-eye 3D display technology has low cost, simple manufacturing process, and can realize 2D/3D switching, and is welcomed by the market. At present, the divergence direction of ordinary cylindrical lens units will be modulated by the curved surface lens when the light passes through the curved surface lens. The chromatic aberration of green and blue lights reduces the resolution in the direction of the vertical cylindrical lens cylinder.

Contents of the invention

In view of this, the object of the present invention is to provide a double-glued micro-cylindrical lens grating device and a preparation method thereof for naked-eye 3D display, which can reduce the size of red, green and blue diffuse spots, reduce the defocus size, increase the central spot intensity, reduce The degree of crosstalk and the effect of improving the lateral (ie perpendicular to the cylinder of the lenticular lens) and axial resolution.

In order to achieve the above object, the present invention adopts the following technical solution: a double-glued microcylindrical lens grating device applied to naked-eye 3D display, which is characterized in that it includes a substrate, a plano-convex lens grating array, a concave-convex lens grating array, and a filling layer; The plano-convex lens grating array is arranged on the upper surface of the substrate, and the concave surface of the meniscus lens grating array fits with the convex surface of the plano-convex lens grating array; the inner side of the filling layer covers the convex surface of the meniscus lens grating array, and the outer side remains flat; The refractive index of the plano-convex lens grating array and the concave-convex lens grating array are different, and the refractive index of the filling layer is smaller than the composite effective refractive index of the plano-convex lens grating array and the concave-convex lens grating array.

Further, the plano-convex lens grating array is a converging positive lens.

Further, the meniscus lens grating array is a divergent negative lens.

Further, the material of the plano-convex lens grating array, the concave-convex lens grating array and the filling layer is ultraviolet curable liquid glue.

Further, the ultraviolet curable liquid glue includes silicone rubber, acrylic resin, unsaturated polyester, polyurethane, and epoxy resin.

A method for preparing a double-glued microcylindrical lens grating device for naked-eye 3D display, characterized in that it comprises the following steps:

Step S1: Coating the first layer of transparent UV-curable liquid glue on the substrate, using the first mold to etch the UV-curable liquid glue into a plano-convex lens grating array and curing;

Step S2: Coating a second layer of transparent UV-curable liquid glue on the plano-convex lens grating array, using a second mold to etch the UV-curable liquid glue into a concave-convex lens grating array and performing curing treatment;

Step S3: Coating a third layer of transparent UV-curable liquid glue on the concave-convex lens grating array, using the third mold to etch the UV-curable liquid glue into a filling layer by nanoimprint technology and performing curing treatment.

Further, the curing treatment is irradiation treatment using cold ultraviolet light equipment.

Further, the embossing surface of the first mold is a concave surface matching the convex surface of the plano-convex lens grating array.

Further, the embossing surface of the second mold is a concave surface matching the convex surface of the meniscus lens grating array.

Further, the embossing surface of the third mold is plane.

Compared with the prior art, the present invention has the following beneficial effects: on the one hand, the refractive index n1 of the plano-convex lens grating array used in the present invention is different from the refractive index n2 of the concave-convex lens grating array, and the radius of curvature is different, which can correct spherical aberration and chromatic aberration, forming Small red, green and blue diffuse spots can effectively improve the lateral and axial resolution of the cylindrical lens; on the other hand, the composite effective refractive index of the plano-convex lens grating array and the concave-convex lens grating array of the present invention is greater than the refractive index n3 of the filling layer , forming a complete structure of the double-glued micro-pillar lens grating device; finally, the outermost transparent film filling material of the grating can effectively prevent the damage of the double-glued micro-pillar lens grating device. The present invention prepares standard molds and film pressing processes at the same time, can produce large-area double-glued micro-pillar lens grating devices, can save production costs, and expand production; compared with the existing common micro-pillar lens grating technology, the present invention overcomes the common The inherent defects of the cylindrical lens grating, its flatness is improved, the production efficiency is integrated, the service life is long, the light focusing property is significantly enhanced, and the comprehensive effect of 3D display is improved.

Description of drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic diagram of partial dimensions of the meniscus lens grating array of the present invention.

Fig. 3 is a schematic diagram of light modulation of a common grating.

Fig. 4 is a schematic diagram of light modulation in the present invention.

Fig. 5 is a schematic diagram of the preparation process of the present invention.

In the figure: 1 - substrate; 2 - plano-convex lens grating array; 3 - concave-convex lens grating array; 4 - filling layer; 5 - first mold; 6 - second mold; 7 - third mold.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Please refer to Fig. 1, the present invention provides a double-glued microcylindrical lens grating device for naked-eye 3D display, which is characterized in that: it includes a substrate 1, a plano-convex lens grating array 2, a concave-convex lens grating array 3 and a filling layer 4; the plano-convex lens The grating array is arranged on the upper surface of the substrate, and the concave surface of the concave-convex lens grating array fits with the convex surface of the plano-convex lens grating array; the inner side of the filling layer covers the convex surface of the concave-convex lens grating array, and the outer side remains flat; the plano-convex lens The refractive index n1 of the grating array is different from the refractive index n2 of the concave-convex lens grating array, and n1<n2; and the refractive index n3 of the filling layer is smaller than the composite effective refractive index of the plano-convex lens grating array and the concave-convex lens grating array, which ensures the effect of the grating .

In this embodiment, the plano-convex lens grating array is a converging positive lens; the concave-convex lens grating array is a diverging negative lens. Please refer to FIG. 2 for a partial schematic diagram of the meniscus grating array. The thickness h1 of the middle part is smaller than the thickness h2 of the edge.

In this embodiment, the materials of the plano-convex lens grating array, the concave-convex lens grating array and the filling layer are ultraviolet curable liquid glue; including silicone rubber, acrylic resin, unsaturated polyester, polyurethane, and epoxy resin. Preferably, the materials of the plano-convex lens grating array, the meniscus lens grating array and the filling layer in this embodiment are light-transmitting materials such as polymethyl methacrylate (PMMA) or polyethylene terephthalate (PET). The substrate is made of light-transmitting materials such as glass, polymethyl methacrylate (PMMA) or polyethylene terephthalate (PET).

Fig. 3 is a schematic diagram of light modulation of a common grating in the prior art. The light modulation of a common grating through a plano-convex lens makes the red light (R) defocus (the distance from the intersection point to the screen) too large; and Fig. 4 is the light of the present invention Schematic diagram of modulation, through the modulation of plano-convex lens and concave-convex lens, red light (R), green light (G), blue (B) is modulated into green light (G), red light (R), blue (B) order; and realize that the red, green, and blue lights have the same focal length in the horizontal and vertical spaces to eliminate light dispersion.

Please refer to FIG. 5. This embodiment also provides a method for preparing a double-glued microcylindrical lens grating device for naked-eye 3D display, including the following steps:

Step S1: Coating the first layer of transparent UV-curable liquid glue on the substrate, using the first mold 5 to etch the UV-curable liquid glue into a plano-convex lens grating array through nanoimprint technology and performing curing treatment; remove the first layer In the mould, a layer of transparent film, that is, a plano-convex lens grating array is formed on the substrate; the embossing surface of the first mold is a concave surface matching the convex surface of the plano-convex lens grating array. In this step, the refractive index of the cured UV-curable liquid adhesive is basically the same as that of the substrate material.

Step S2: Coating a second layer of transparent UV-curable liquid glue on the plano-convex lens grating array, using the second mold 6 to etch the UV-curable liquid glue into a concave-convex lens grating array and curing Take off the second mold, and form a layer of transparent film on the plano-convex lens grating array, that is, the concave-convex lens grating array; the embossing surface of the second mold is a concave surface that matches the convex surface of the concave-convex lens grating array. In this step, the cured refractive index of the ultraviolet curable liquid glue is inconsistent with that of the plano-convex lens grating array.

Step S3: Coating a third layer of transparent UV-curable liquid glue on the concave-convex lens grating array, using the third mold 7 to etch the UV-curable liquid glue into a filling layer through nanoimprint technology and performing curing treatment; Go to the third mold, and form a layer of transparent film and filling layer on the concave-convex lens grating array. The filling layer fills up the convex surface of the meniscus lens grating array. The embossing surface of the third mold is plane.

In this embodiment, the curing treatment is irradiation treatment using cold ultraviolet light equipment.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope of the present invention.

Claims (10)

1. double gluing microtrabeculae lenticulation devices that a kind of bore hole 3D shows, it is characterised in that：Including substrate, planoconvex lenss grating Array, meniscuss grating array and packed layer；The planoconvex lenss grating array is arranged on upper surface of base plate, described concavo-convex The concave surface of mirror grating array mutually agrees with the convex surface of planoconvex lenss grating array；It is covered on the inside of the packed layer concavo-convex On the convex surface of mirror grating array, outside keeps smooth；The refraction of the planoconvex lenss grating array and meniscuss grating array Rate is different, and the refractive index of packed layer is less than compound effective refraction of planoconvex lenss grating array and meniscuss grating array Rate.

2. double gluing microtrabeculae lenticulation devices that bore hole 3D according to claim 1 shows, it is characterised in that：It is described flat Convex lenss grating array is the plus lens for converging property.

3. double gluing microtrabeculae lenticulation devices that bore hole 3D according to claim 1 shows, it is characterised in that：It is described recessed Convex lenss grating array is the minus lenses for dissipating property.

4. double gluing microtrabeculae lenticulation devices that bore hole 3D according to claim 1 shows, it is characterised in that：It is described flat The material of convex lenss grating array, meniscuss grating array and packed layer is ultraviolet curing liquid glue.

5. double gluing microtrabeculae lenticulation devices that bore hole 3D according to claim 4 shows, it is characterised in that：The purple Outside line solidification liquid glue includes organic silicon rubber, acrylic type resin, unsaturated polyester (UP), polyurethane, epoxy resin.

6. the preparation method of double gluing microtrabeculae lenticulation devices that a kind of bore hole 3D based on described in claim 1 shows, its It is characterised by, comprises the following steps：

Step S1：The transparent ultraviolet curing liquid glue of ground floor is coated on substrate, using the first mould nano impression is passed through Technology is by the ultraviolet curing liquid glue etching is for planoconvex lenss grating array and carries out cured；

Step S2：The transparent ultraviolet curing liquid glue of the second layer is coated on the planoconvex lenss grating array, second is used Mould is by nanometer embossing by the ultraviolet curing liquid glue etching is for meniscuss grating array and carries out cured；

Step S3：The transparent ultraviolet curing liquid glue of third layer is coated on the meniscuss grating array, using the 3rd Mould is by nanometer embossing by the ultraviolet curing liquid glue etching is for packed layer and carries out cured.

7. the preparation method of double gluing microtrabeculae lenticulation devices that bore hole 3D according to claim 6 shows, its feature It is：The cured is to be irradiated process using cold ultra-violet apparatus.

8. the preparation method of double gluing microtrabeculae lenticulation devices that bore hole 3D according to claim 6 shows, its feature It is：The impressing face of first mould is the concave surface mutually agreed with the convex surface of planoconvex lenss grating array.

9. the preparation method of double gluing microtrabeculae lenticulation devices that bore hole 3D according to claim 6 shows, its feature It is：The impressing face of second mould is the concave surface mutually agreed with the convex surface of meniscuss grating array.

10. the preparation method of double gluing microtrabeculae lenticulation devices that bore hole 3D according to claim 6 shows, its feature It is：The impressing face of the 3rd mould is plane.