CN109031480B

CN109031480B - Optical film and decorative member

Info

Publication number: CN109031480B
Application number: CN201810667964.XA
Authority: CN
Inventors: 洪莘; 高育龙; 刘立冬
Original assignee: Shine Optoelectronics Kunshan Co Ltd
Current assignee: Shine Optoelectronics Kunshan Co Ltd
Priority date: 2018-06-26
Filing date: 2018-06-26
Publication date: 2021-04-23
Anticipated expiration: 2038-06-26
Also published as: CN109031480A

Abstract

The invention discloses an optical film which comprises a bearing layer and a micro-nano structure layer arranged on one side of the bearing layer, wherein the micro-nano structure layer comprises image-text textures, the image-text textures of the micro-nano structure layer at a preset position are cut off to form a cut-off edge, and the cut-off edge is provided with color matching textures. The color matching textures are arranged on the cutting edge, so that sawtooth patterns generated due to overlarge image-text texture gaps or due to cutting and the like can be eliminated, and the quality of the optical film is improved. The invention also discloses a decorative piece with the optical film.

Description

Optical film and decorative member

Technical Field

The invention relates to the field of optics, in particular to an optical film and a decoration.

Background

Optical films are widely used in various fields, for example, in optical components in display modules, in security elements, or in decorative parts for housings of consumer electronics such as mobile phones and tablet computers, home appliances, cosmetics, and packaging boxes. The optical film has the microstructure which has the functions of reflection, refraction, scattering or diffraction and the like on the light of a natural light source or a specific light source, thereby generating different optical effects and meeting the optical requirements of a plurality of fields.

The optical film comprises a micro-nano structure layer, the micro-nano structure layer is provided with a plurality of distributed image-text textures, and the plurality of image-text textures have the effects of reflection, refraction and the like on light to generate an optical effect. When the optical film is applied to a product, the optical film is usually used as a decorative film to be applied to a product housing, the optical film is cut at the edge of the housing due to matching with the shape of the housing, and due to cutting and the like, the image-text texture at the edge is easy to generate a zigzag optical effect, which is referred to as zigzag texture herein. The sawtooth lines can make the optical effect of the optical film inconsistent, and further influence the function exertion of the optical film. For example, when the optical film is used in the decoration field, the sawtooth lines affect the decoration effect of the optical film.

Disclosure of Invention

Based on this, it is necessary to provide an optical film capable of eliminating the jagged lines.

The technical scheme of the invention is as follows:

the utility model provides an optical film, its include the bearer layer and set up in the micro-nano structure layer of bearer layer one side, the micro-nano structure layer includes the picture and text texture, the picture and text texture of micro-nano structure layer in predetermined department is cut and is formed and cut the edge, it is provided with the texture of matching colors to cut the edge.

In one embodiment, the image texture is arranged at intervals, and the gap at the truncation edge is greater than or equal to 70 micrometers.

In one embodiment, the texture of the graph and the text are arranged at intervals, and gaps at the position of the truncation edge are not uniform in size.

In one embodiment, at the truncated edge, the teletext texture coincides with or is joined to a partial color texture.

In one embodiment, the truncation edge extends from a truncation of the teletext texture, the teletext texture not extending to the truncation edge.

In one embodiment, the color matching texture is a plurality of small short lines, and the small short lines are cylindrical mirrors.

In one embodiment, the plurality of small stubs are periodically arranged.

In one embodiment, each of the periods includes a small stub having a width occupying less than or equal to half a length of one period.

In one embodiment, the color matching texture is a polygonal cylindrical mirror.

In one embodiment, the fold line of the fold line-shaped cylindrical mirror extends periodically along a straight line or an arc line.

In one embodiment, the color matching texture is a plurality of microlenses.

In one embodiment, at least one group of micro lenses arranged in a row at intervals is arranged between two adjacent image-text textures of the truncation edge of the micro-nano structure layer.

In one embodiment, the image-text texture is a plurality of linear cylindrical mirrors arranged in an array mode, the plurality of linear cylindrical mirrors at the edge of the micro-nano structure layer are cut off to form the cut-off edge, a plurality of small short lines are arranged on the cut-off edge, and part of the small short lines are overlapped with the image-text texture.

In one embodiment, the image-text texture is a plurality of linear cylindrical mirrors arranged in an array, the plurality of linear cylindrical mirrors at the edge of the micro-nano structure layer are cut off to form the cut-off edge, and a plurality of segmental microlenses are arranged on the cut-off edge.

In one embodiment, the image-text texture is a plurality of CD lines, the plurality of CD lines at the edge of the micro-nano structure layer are truncated to form the truncation edge, and a polygonal line-shaped cylindrical mirror is arranged at the gap of the truncated image-text texture along the truncation edge.

In one embodiment, the image-text texture is a plurality of CD lines, the plurality of CD lines on the non-edge of the micro-nano structure layer are cut off to form the cut-off edge, and the cut-off edge is provided with a plurality of small short lines.

In one embodiment, the truncation edge is circular, the truncation edge does not have image-text textures therein, and the plurality of small short lines are distributed along the circular ring.

In one embodiment, the color matching texture and the adjacent image-text texture have the same or mutually adaptive optical effects.

The invention also discloses a decorative piece which comprises the optical film.

The invention has the beneficial effects that: the color matching textures are arranged on the cutting edge, so that sawtooth patterns generated due to overlarge gaps of the image-text textures or overlarge gaps caused by cutting can be eliminated, and the quality of the optical film is improved.

Drawings

FIG. 1 is a schematic view of an optical film of the present disclosure;

FIG. 2 is an enlarged schematic view of a circled portion of the optical film of FIG. 1;

FIG. 3 is a schematic view of another optical film of the present disclosure;

FIG. 4 is an enlarged schematic view of a circled portion of the optical film of FIG. 3;

FIG. 5 is a schematic view of another optical film of the present disclosure;

FIG. 6 is an enlarged detail schematic view of the optical film of FIG. 5;

FIG. 7 is a schematic view of another optical film of the present disclosure;

FIG. 8 is an enlarged schematic view of the circled portion of the optical film of FIG. 7.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described below. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The invention discloses an optical film which comprises a bearing layer and a micro-nano structure layer arranged on one side of the bearing layer. The micro-nano structure layer comprises a plurality of image-text textures arranged at intervals. The image-text textures of the micro-nano structure layer at the preset position are cut off to form a cut-off edge, and the cut-off edge is provided with color matching textures. The color matching textures are arranged on the cutting edge, so that sawtooth patterns generated due to overlarge image-text texture gaps or due to cutting and the like can be eliminated, and the quality of the optical film is improved.

Preferably, the spacing between the text and text textures at the cut-off edge is greater than or equal to 70 microns, such as 80 microns, 90 microns and the like. The image-text textures with the gaps larger than or equal to 70 microns are cut off, then the sawtooth textures are easy to appear at the cut-off edge, and the sawtooth textures can be eliminated after the color matching textures are arranged on the cut-off edge.

Preferably, the size of the gaps between the text texture and the truncation edge is not uniform. Due to the reasons of distribution, arrangement mode, arrangement angle, arrangement density and the like of the image-text textures or due to the requirement of truncation along a straight line, a curve, an arc line, a broken line and the like during truncation, the sizes, the numbers, the types, the arrangement modes and the like of the image-text textures of the color matching textures need to be distributed according to the sizes of the gaps, so that the sawtooth textures are eliminated, and the image-text textures and the color matching textures have the same optical effect at the truncation edge.

Preferably, at the truncated edge, the image-text texture coincides with the partial color matching texture. The color matching textures are distributed along the truncation edges according to a set rule and do not avoid the image and text textures, so that part of the color matching textures are overlapped with the image and text textures. The overlapping is not an overlapping meaning that when there is both a text texture and a color texture, the two textures do not exist separately and overlap but partially share. Or, the image-text texture and the part of the color matching texture are in a joint state when viewed from the final product.

Preferably, the truncation edge extends from the truncation of the text texture, and the text texture does not extend to the truncation edge. After the image-text textures are cut off to the edge or the non-edge preset position, a cutting edge is arranged in an extending mode from the cutting edge, color matching textures are arranged on the cutting edge, the image-text textures are not arranged on the cutting edge, the color matching textures are arranged on the cutting edge, and part of the color matching textures can be connected with the image-text textures which are located on the cutting edge in a critical mode.

Preferably, the color matching texture is a plurality of small short lines, and the small short lines are cylindrical mirrors. The minor short line can be a linear cylindrical mirror, a curved cylindrical mirror, an arc cylindrical mirror, a polygonal cylindrical mirror and the like. Preferably, the plurality of small short lines are arranged periodically, each period comprises one small short line, and the width of each small short line occupies less than or equal to half of the length of one period. For example, the period has a length of 20 to 50 microns, the width of the small stub is 2 to 10 microns, and the length of the small stub is 30 to 100 microns. The line type of the small stub can be adapted to the line type of the graphic texture. The small short lines can be arranged in a deflection way and are adaptive to the deflection direction of the image-text textures. The length of the small short line can be determined according to the width of the image-text texture, the size of the gap and other factors so as to eliminate the sawtooth texture and harmonize the optical effect of the image-text texture at the truncation edge.

Preferably, the color matching texture is a polygonal cylindrical mirror. The broken line of the broken line-shaped cylindrical mirror periodically extends along a straight line or an arc line. Each period includes a vertex and two sides, and the length of each period is equal to or greater than 30 micrometers. The polygonal line-shaped cylindrical mirror is suitable for the image-text textures at the cut-off edge to be arc-shaped and has larger gaps, the polygonal line-shaped cylindrical mirror can eliminate the sawtooth textures, and can generate an arc-like optical effect to be matched with the arc-shaped optical effect of the image-text textures.

Preferably, the color matching texture is a plurality of microlenses. At least one group of micro lenses which are arranged in a row at intervals are arranged between two adjacent image-text textures on the cutting edge of the micro-nano structure layer. For example, the diameter of the microlens is 10 micrometers, and the gap between two adjacent microlenses is 3 micrometers.

Preferably, the truncation edge is located at one or more edges of the micro-nano structure layer, such as an upper edge, a lower edge, a left edge and a right edge. The cutting edge is positioned at the non-edge of the micro-nano structure layer, and a blank area is arranged at the preset position of the non-edge of the micro-nano structure layer and is circular, waist-shaped, oval, triangular, quadrilateral, polygonal and the like. For example, optical film is applied to lid behind the cell-phone, sets up blank area in the upper left corner predetermined place of back lid, can set up the camera in this blank area, then sets up around the top edge, lower limb and the blank area of this optical film and cut the edge, cuts along including the texture of matching colors.

For example, the image-text texture is a plurality of linear cylindrical mirrors which are arranged in an array, the plurality of linear cylindrical mirrors at the edge of the micro-nano structure layer are cut off to form a cut-off edge, a plurality of small short lines are arranged on the cut-off edge, and part of the small short lines are overlapped with the image-text texture; the image-text texture is a plurality of linear cylindrical mirrors which are arranged in an array mode, the plurality of linear cylindrical mirrors at the edge of the micro-nano structure layer are cut off to form a cut-off edge, and a plurality of segment-shaped micro lenses are arranged on the cut-off edge; the image-text textures are a plurality of CD (compact disc) lines, the plurality of CD lines on the edge of the micro-nano structure layer are cut off to form the cut-off edge, and the cut-off edge is provided with a polygonal line-shaped cylindrical mirror at the gap after the image-text textures are cut off; the image-text texture is a plurality of CD (compact disc) textures, the micro-nano structure layer is cut off at the non-edge of the plurality of CD textures to form a cut-off edge, and the cut-off edge is provided with a plurality of small short lines.

Preferably, the image-text texture is a micro-nano optical structure such as a linear cylindrical mirror, a curved cylindrical mirror, an arc cylindrical mirror, a polygonal cylindrical mirror, a CD texture, a micro lens and the like. The image texture can be a convex structure and/or a concave structure. The section of the image-text texture is in a major arc shape, a triangle shape, a quadrangle shape, a trapezoid shape, a polygon shape or an irregular special shape.

Preferably, the material of the micro-nano structure layer can be thermosetting glue or light curing glue, and is formed by stamping or photoetching. The micro-nano structure layer can also comprise an imprinted or photoetched residual glue layer, and after solidification, the residual glue layer and the bearing layer can be fused into an integral structure. Certainly, the micro-nano structure layer can also have no adhesive residue layer. In some embodiments, the residual glue layer can serve as a bearing layer, and the bearing layer can also be any one or a combination of PET, PC, PMMA or PE. For example, if the bearing layer is a PET layer, coating photocuring glue on the PET layer, impressing and curing to form a micro-nano structure layer, and leaving a residual glue layer; the micro-nano structure layer can also be directly formed on the PET layer by printing and other modes, and the PET layer is not provided with a residual glue layer.

Preferably, the optical film further comprises a reflective layer covering the micro-nano structure layer and a coloring layer covering the reflective layer. The reflecting layer is used for enhancing the optical effect, and the coloring layer can bring color to the optical film. The material of the reflective layer may be selected from metals, metal oxides or non-metal oxides. The material of the colored layer may be selected from coloring materials, metallic materials, metal oxides or nonmetal oxides.

Preferably, the optical film further comprises a protective layer arranged on the micro-nano structure layer, the refractive index of the protective layer is different from that of the micro-nano structure layer, and the refractive index difference is greater than or equal to 0.5.

Hereinafter, the optical film of the present invention will be described by way of example with reference to the drawings.

Referring to fig. 1 and fig. 2, an optical film 100 is disclosed, which includes a supporting layer (not shown) and a micro-nano structure layer 1 disposed on one side of the supporting layer. The micro-nano structure layer 1 comprises image-text textures 11 with intervals. The micro-nano structure layer 1 is cut off at the upper edge and the lower edge of the image-text texture 11 to form a cutting edge. The truncated edge is provided with a color matching texture 12. The image-text texture 11 is a plurality of linear cylindrical mirrors arranged at intervals, and the linear cylindrical mirrors extend from the upper edge to the lower edge and are cut off to form upper and lower cut-off edges when the upper edge and the lower edge are reached. The linear cylindrical mirror comprises breakpoints 111 distributed on the upper truncation edge and the lower truncation edge. The color matching texture 12 is a plurality of small short lines 121, and the small short lines 121 are linear cylindrical mirrors. The gaps between the image-text grains 11 are consistent in width and regular in shape. The width D1 of the image-text texture 11 is 80 micrometers, the gap W1 is 80 micrometers, the period length C1 of the color-matching texture 12 is 40 micrometers, the width D1 of the small short lines 121 is 5 micrometers, and the length L1 of the small short lines is 40 micrometers. The truncation is along the area defined between the ends of the length of the small stub 121 and extending in the direction of the arrangement of the text texture 11 and the color matching texture 12. The small short lines 121 are arranged periodically along the truncation edge, and part of the small short lines 121 are arranged to coincide with the breakpoint 111. Fig. 1 and 2 show the arrangement of the break point 111 and the small short line 121, and on the product, the small short line 121 in the break point 111 is not shown after coinciding with the break point, so that only the small short line 121 arranged in the gap is seen. In other embodiments, the color matching texture is a plurality of microlenses. For example, a group of microlenses arranged in a row at intervals is arranged between the breakpoints of two adjacent image-text textures. The diameter of the microlens is 20 micrometers, and the gap between two adjacent microlenses is 3 micrometers.

Referring to fig. 3 and 4, an optical film 200 is disclosed, which includes a carrier layer (not shown) and a micro-nano structure layer 2 disposed on one side of the carrier layer. The micro-nano structure layer 2 comprises image-text textures 21 with intervals. The micro-nano structure layer 2 is formed by cutting off the image-text textures 21 at the upper edge and the lower edge to form a cutting edge, and the cutting edge is provided with color matching textures 22. The image-text texture 21 is a plurality of linear cylindrical mirrors arranged at intervals, and the lower edges of the linear cylindrical mirrors extend obliquely to the upper edges and are cut off to form upper and lower cut-off edges when the upper edges and the lower edges are reached. The linear cylindrical mirror includes break points 211 arranged at the upper and lower truncation edges, respectively. The color matching texture 22 is a plurality of small short lines 221, and the small short lines 221 are linear cylindrical mirrors. The width D2 of the linear cylindrical mirror is 80 micrometers, the gap W2 is 80 micrometers, the period length C2 of the small stub is 30 micrometers, the width D2 of the small stub is 5 micrometers, and the length L2 of the small stub is 40 micrometers. The small short lines 221 are arranged periodically along the truncation edge, and part of the small short lines 221 are completely overlapped and partially overlapped with the breakpoint 211, and part of the small short lines 221 are connected with the breakpoint 211.

Referring to fig. 5 and fig. 6, an optical film 300 is disclosed, which includes a carrier layer (not shown) and a micro-nano structure layer 3 disposed on one side of the carrier layer. The micro-nano structure layer 3 comprises image-text textures 31 with intervals. The image-text texture 31 of the micro-nano structure layer 3 at the lower edge is cut off to form a cut-off edge. The image-text texture 31 has a break point 311 at the cut-off edge, and the cut-off edge is provided with the color matching texture 32 at the gap of the break point 311. The image-text texture 31 is a plurality of CD textures arranged at intervals, and the color matching texture 32 is a section of polygonal cylindrical mirror 321. The broken line of the polygonal line-shaped cylindrical mirror periodically extends along a straight line, each period comprises a vertex and two edges, two ends of the polygonal line-shaped cylindrical mirror are respectively connected with two broken points 311 after the image-text textures 31 are cut off, and the position where the polygonal line-shaped cylindrical mirror is connected with the broken points 311 is provided with a broken line shape smaller than one period so as to adapt to the gap length. In this embodiment, the period length C3 of the polygonal cylindrical mirror is 60 micrometers, the included angle of the side lines is 45 degrees, and the width d3 is 7 micrometers. The width D3 of graphics texture 31 is 45 microns. The image-text texture 21 is a CD texture and is cut off along an angle parallel to the tangent line, so that the formed gap is larger, and the set color matching texture is a section of polygonal cylindrical mirror, and has the advantages that 1, the sawtooth texture caused by the larger gap can be eliminated; 2. the polygonal line-shaped cylindrical mirror has an optical effect close to that of the image-text texture 21, and the influence of truncation on the overall optical effect of the micro-nano structure layer is reconciled; 3. the polygonal line-shaped cylindrical mirror extends along a straight line and is conveniently arranged at the edge of the straight line.

Referring to fig. 7 and 8, an optical film 400 is disclosed, which includes a carrier layer (not shown) and a micro-nano structure layer 4 disposed on one side of the carrier layer. The micro-nano structure layer 4 comprises image-text textures 41 with intervals. The micro-nano structure layer 4 is cut off by a circle at a position in the middle of the non-edge to form a cutting edge along the circumference. The CD line to the edge of the truncation edge is a breakpoint 411, and the truncation edge is provided with a color matching texture 42. The image-text textures 41 are CD (compact disc) textures arranged at intervals, and part of the textures of the CD textures is cut off by a circular shape and extends to the cut-off position to form a circular cut-off edge. The color matching texture 42 is a plurality of small short lines 421 periodically arranged along a circular ring, and the small short lines 421 are linear cylindrical mirrors. The width D4 of the CD stripes is 80 microns, the gap W4 of the CD stripes is 80 microns, the period length C4 of the small short lines 421 is 40 microns, the width D4 of the small short lines is 10 microns, and the length L4 of the small short lines is 50 microns. The cutting edge is arranged at the cutting position, and a circle of color matching textures are arranged on the cutting edge, so that the sawtooth textures generated at the cutting position can be eliminated, and the quality of the optical film is improved.

The decorative article may include a substrate, which may be metal, glass, or the like, and an optical film disposed on the substrate. The optical film may further include an adhesive layer adhered to the base material layer. For example, the decoration can be a mobile phone rear cover, a tablet computer rear cover, a refrigerator shell and the like, so that the mobile phone, the tablet computer, the refrigerator and the like can present a preset optical effect, and sawtooth grains can not appear at the cut places such as the edge, the boundary with the camera, the boundary with the display screen and the like, so that the decoration has a complete optical effect and has a high-quality decoration effect.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail. In the above description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Moreover, the technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The optical film is characterized by comprising a bearing layer and a micro-nano structure layer arranged on one side of the bearing layer, wherein the micro-nano structure layer comprises image-text textures, the image-text textures of the micro-nano structure layer at a preset position are cut off to form a cut-off edge, and the cut-off edge is provided with color matching textures;

the color matching textures are a plurality of small short lines, the small short lines are cylindrical mirrors, and the small short lines are linear cylindrical mirrors, curved cylindrical mirrors or polygonal cylindrical mirrors; the line type of the small short line is matched with the line type of the image-text texture, and the image-text texture and the color matching texture have the same optical effect at the position of the truncation edge.

2. The optical film of claim 1, wherein the image-text textures are spaced apart and have a gap at a truncation edge of 70 microns or more.

3. The optical film as claimed in claim 1, wherein the image-text textures are spaced apart and have gaps of different sizes at the cut-off edges.

4. The optical film of claim 1, wherein the text texture coincides with or is joined to a portion of the color texture at the cut edge.

5. The optical film of claim 1, wherein the truncation edge extends from a truncation of the text texture that does not extend to the truncation edge.

6. The optical film of claim 1, wherein the color matching texture is a plurality of small dashes, the small dashes being cylindrical mirrors.

7. The optical film according to claim 6, wherein the plurality of small stubs are arranged periodically, each period includes one small stub, and the width of the small stub occupies less than or equal to half of the length of one period.

8. The optical film according to claim 1, wherein the color matching texture is a polygonal line-shaped cylindrical mirror, and the polygonal line of the polygonal line-shaped cylindrical mirror periodically extends along a straight line or an arc line.

9. The optical film according to claim 1, wherein the color matching textures are a plurality of microlenses, and at least one group of microlenses arranged in a row at intervals is arranged between two adjacent image-text textures on the truncation edge of the micro-nano structure layer.

10. The optical film according to claim 1, wherein the image-text texture is a plurality of linear cylindrical mirrors arranged in an array, the plurality of linear cylindrical mirrors at the edge of the micro-nano structure layer are cut off to form the cut-off edge, a plurality of short lines are arranged on the cut-off edge, and part of the short lines coincide with the image-text texture.

11. The optical film according to claim 1, wherein the image-text texture is a plurality of linear cylindrical mirrors arranged in an array, the plurality of linear cylindrical mirrors at the edges of the micro-nano structure layer are cut off to form the cut-off edges, and a plurality of segment-shaped microlenses are arranged on the cut-off edges.

12. The optical film according to claim 1, wherein the image-text texture is a plurality of CD textures, the plurality of CD textures at the edge of the micro-nano structure layer are truncated to form the truncation edge, and a polygonal cylindrical mirror is disposed at a gap between the truncated image-text textures.

13. The optical film according to claim 1, wherein the image-text texture is a plurality of CD (compact disc) textures, the micro-nano structure layer is cut off from the plurality of CD textures at non-edges to form the cut-off edge, and the cut-off edge is provided with a plurality of small short lines.

14. The optical film according to claim 13, wherein the truncated rim is circular, the truncated rim has no image-text texture therein, and the plurality of short dashes are distributed along the circular rim.

15. A decorative piece characterized by comprising the optical film according to any one of claims 1 to 14.