Prism structure for multi-layer laminating film and its processing technology

Abstract

The present invention belongs to the technical field of optical thin films, and in particular, relates to a prism structure for a multilayer laminating film and a processing technology thereof; the prism structure comprises a base layer electroplated on the surface of a base roller, the surface of the base layer is formed with triangular protrusions and convex pits by laser corrosion and tool engraving, the triangular protrusions have two circles, which are respectively arranged close to the outer end, and the triangular protrusions in each circle are equidistantly distributed, and a number of convex pits are distributed between the two circles of triangular protrusions; the processing steps include electroplating the base layer on the surface of the base roller, cooling, laser corrosion and engraving convex pits, tool engraving triangular protrusions and surface atomization treatment. The prism structure of the present invention has good shielding properties, high transmittance, and is not easy to become rough. In the process of UV curing resin transfer, the resin will not remain in the structure, effectively avoiding the occurrence of periodic adverse phenomena.

Description

Technical Field

[0001] The invention belongs to the technical field of optical films, and in particular relates to a prism structure for a multi-layer laminating film and a processing technology thereof. Background Art

[0002] With the popularization of TFT-LCD liquid crystal display technology, the demand for its backlight module and related optical films is also increasing. With the impact of new OLED technology, the price of LCD liquid crystal displays in the industry has dropped, and the corresponding raw materials also need to be priced lower, which requires cost reduction. As a result, two-layer, three-layer, and even four-layer multi-layer lamination films have appeared, directly replacing the original D+P+P+DP (upper diffusion + light enhancement + light enhancement + diffusion plate) backlight module architecture, which can reduce product price costs and labor assembly costs. Traditional multi-layer films require multiple assembly by personnel, while multi-layer single composite films only need to be assembled once.

[0003] The bottom layer of the multi-layer laminate film has a high haze and strong shielding structure, which is used to replace the diffuser in the backlight film set. Figure 5 As shown, the prism structure with equal spacing is first engraved, and then the aluminum oxide chips are evenly sprayed on the surface of the structure to achieve an atomization effect. However, this structural design is not scientific and reasonable, and the processing time is long. During use, the prism surface is easy to become rough. During the UV curing resin transfer process, some resin will remain in the structure, causing periodic defects; the transmittance is mostly around 80%, which needs to be improved.

[0004] In addition, the prism structure processing technology of the traditional multi-layer laminated film is as follows: first, the base roller is electroplated with precision copper, and the defects, thickness and hardness parameters of the copper layer are checked; the base roller is placed on an ultra-precision processing machine, and a diamond tool is used to process the prism structure; after the prism structure is processed, the base roller is unloaded and installed on a sandblasting machine, and alumina chips are sprayed on the surface; finally, a chrome layer is electroplated on the surface of the copper layer, which has the problem of complex processing technology. Summary of the invention

[0005] The purpose of the present invention is to overcome the above problems existing in the prior art and to provide a prism structure for a multi-layer laminating film and a processing technology thereof.

[0006] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0007] A prism structure for a multilayer laminating film comprises a base layer electroplated on the surface of a base roller, wherein the surface of the base layer is formed with triangular protrusions and pits by laser etching and tool engraving, wherein the triangular protrusions have two circles, which are respectively arranged close to the outer ends, and the triangular protrusions in each circle are equidistantly distributed, and a number of pits are distributed between the two circles of triangular protrusions.

[0008] Furthermore, in the above-mentioned prism structure for the multi-layer laminating film, the material of the base layer is electroplated copper.

[0009] Furthermore, in the above-mentioned prism structure for the multi-layer laminating film, the thickness of the base layer is 800-1000 um, and the hardness is 210-260 HV.

[0010] Furthermore, in the above-mentioned prism structure for the multi-layer laminating film, the base length of the triangular protrusion is 60-80 um, and the height is 30-40 um.

[0011] Furthermore, in the above-mentioned prism structure for the multi-layer laminating film, the interval between the two circles of triangular protrusions is 200-220 um.

[0012] Furthermore, in the above-mentioned prism structure for the multi-layer laminating film, the height of the convex pit is 20-25 um, the length along the axis direction of the base roller is 180-220 um, and the width is 40-60 um.

[0013] Furthermore, in the above-mentioned prism structure for the multi-layer laminating film, the tool is an isosceles triangle diamond tool, and the sharp angle of the isosceles triangle is 88-90°.

[0014] Furthermore, in the above-mentioned prism structure for multi-layer laminating film, the surface of the prism structure is subjected to sandblasting and atomization treatment, and the atomization range is 90-98%.

[0015] Furthermore, in the above-mentioned prism structure for the multi-layer laminating film, the transmittance of the prism structure is 90-95%.

[0016] A processing technology for a prism structure comprises the following steps:

[0017] 1) Electroplating a base layer on the surface of the base roller, the base layer thickness is 800-1000um, and the hardness is 210-260HV;

[0018] 2) The copper-plated base roller is placed to cool and kept at a constant temperature for 12-36 hours;

[0019] 3) Use an ordinary precision lathe on the base roller frame to calibrate the base roller runout value within 5um, and use laser etching to carve out convex pits with a height of 20-25um, a length of 180-220um along the axis of the base roller, and a width of 40-60um; after the engraving is completed, use electropolishing to treat the surface of the base roller to remove the burrs left by the laser etching;

[0020] 4) Replace the isosceles triangle diamond tool and carve equally spaced triangular protrusions with a base length of 60-80um and a height of 30-40um;

[0021] 5) Surface atomization treatment.

[0022] The beneficial effects of the present invention are:

[0023] The prism structure for the multi-layer laminating film of the present invention is reasonably designed, and the structure is not easy to become rough during use. During the UV curing resin transfer process, the resin will not remain in the structure, effectively avoiding the occurrence of periodic adverse phenomena; the prism structure of the present invention has a simple processing technology, and the prism structure formed by the processing technology has better shielding properties than the traditional prism structure. Under the premise that the haze is guaranteed to be above 90%, the transmittance can be increased from 80% to above 90%, and the product brightness can be increased by 2%.

[0024] Of course, any product implementing the present invention does not necessarily need to achieve all of the above advantages at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0026] Figure 1 A schematic diagram of a prism structure for a multi-layer laminating film of the present invention;

[0027] Figure 2 It is a schematic diagram of the structure of the base roller in the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the base roller after laser etching and engraving in the present invention;

[0029] Figure 4 It is a schematic diagram of the structure of the pit in the present invention;

[0030] Figure 5 A schematic diagram of a prism structure of a conventional multi-layer lamination film in the background art;

[0031] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0032] 1-base layer, 2-base roller, 3-triangular protrusions, 4-convex pits. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Embodiment 1

[0035] The present embodiment is a prism structure for a multi-layer bonding film, which includes a base layer 1 electroplated on the surface of a base roller 2. The surface of the base layer 1 is formed with triangular protrusions 3 and pits 4 by laser etching and tool engraving. There are two circles of triangular protrusions 3, which are respectively arranged close to the outer ends, and the triangular protrusions 3 are equidistantly distributed in each circle. There are a number of pits 4 distributed between the two circles of triangular protrusions 3.

[0036] In this embodiment, the base layer 1 is made of electroplated copper, the thickness of the base layer 1 is 800-1000um, and the hardness is 210-260HV. The base length of the triangular protrusion 3 is 60-80um, and the height is 30-40um. The interval between two circles of triangular protrusions 3 is 200-220um.

[0037] In this embodiment, the height of the convex pit 4 is 20-25 um, the length along the axis of the base roller is 180-220 um, and the width is 40-60 um.

[0038] In this embodiment, the tool is an isosceles triangle diamond tool, and the sharp angle of the isosceles triangle is 88-90 degrees.

[0039] In this embodiment, the surface of the prism structure is subjected to sandblasting atomization treatment, the atomization range is 90-98%, and the transmittance of the prism structure is 90-95%.

[0040] The prism structure provided in this embodiment is not easy to become rough during use. During the UV curing resin transfer process, the resin will not remain in the structure, effectively avoiding the occurrence of periodic adverse phenomena. The prism structure provided in this embodiment has better shielding properties than the traditional prism structure. Under the premise that the haze is guaranteed to be above 90%, the transmittance can be increased from 80% to above 90%, and the product brightness can be increased by 2%.

[0041] Embodiment 2

[0042] A processing technology for a prism structure comprises the following steps:

[0043] 1) Electroplating the base layer on the surface of the base roller, the base layer thickness is 900um and the hardness is 240HV;

[0044] 2) The copper-plated base roller is placed to cool and kept at a constant temperature for 24 hours;

[0045] 3) Use an ordinary precision lathe on the base roller frame to calibrate the base roller runout value within 5um, and use laser etching to carve out irregular convex pits. The height of the convex pits is 20-25um, the length along the axis of the base roller is 180-220um, and the width is 40-60um. After the engraving is completed, use electropolishing to treat the surface of the base roller to remove the burrs left by laser etching;

[0046] 4) Replace the isosceles triangle diamond tool and carve equally spaced triangular protrusions with a base length of 70um and a height of 35um;

[0047] 5) Surface atomization treatment: use fine sand material made of aluminum oxide to spray the sand material evenly on the surface of the base roller, and further atomize it. The atomization range is 95%, and the transmittance of the prism structure is 93%.

[0048] Embodiment 3

[0049] A processing technology for a prism structure comprises the following steps:

[0050] 1) Electroplating the base layer on the surface of the base roller, the base layer thickness is 800um and the hardness is 210HV;

[0051] 2) The copper-plated base roller is placed to cool and kept at a constant temperature for 12 hours;

[0052] 3) Use an ordinary precision lathe on the base roller frame to calibrate the base roller runout value within 5um, and use laser etching to carve out irregular convex pits. The height of the convex pits is 20-25um, the length along the axis of the base roller is 180-220um, and the width is 40-60um. After the engraving is completed, use electropolishing to treat the surface of the base roller to remove the burrs left by laser etching;

[0053] 4) Replace the isosceles triangle diamond tool and carve equally spaced triangular protrusions with a base length of 60um and a height of 30um;

[0054] 5) Surface atomization treatment: use fine sand material made of aluminum oxide to spray the sand material evenly on the surface of the base roller, and further atomize it. The atomization range is 90%, and the transmittance of the prism structure is 90%.

[0055] Embodiment 4

[0056] A processing technology for a prism structure comprises the following steps:

[0057] 1) Electroplating the base layer on the surface of the base roller, the base layer thickness is 1000um and the hardness is 260HV;

[0058] 2) The copper-plated base roller is placed to cool and kept at a constant temperature for 36 hours;

[0059] 3) Use an ordinary precision lathe on the base roller frame to calibrate the base roller runout value within 5um, and use laser etching to carve out irregular convex pits. The height of the convex pits is 20-25um, the length along the axis of the base roller is 180-220um, and the width is 40-60um. After the engraving is completed, use electropolishing to treat the surface of the base roller to remove the burrs left by laser etching;

[0060] 4) Replace the isosceles triangle diamond tool and carve equally spaced triangular protrusions with a base length of 80um and a height of 40um;

[0061] 5) Surface atomization treatment: use fine sand material made of aluminum oxide to spray the sand material evenly on the surface of the base roller, and further atomize it. The atomization range is 98%, and the transmittance of the prism structure is 95%.

[0062] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A prism structure for a multi-layer laminating film, characterized in that: The prism structure includes a base layer electroplated on the surface of a base roller, the base layer is made of electroplated copper, the surface of the base layer is laser etched and cutter engraved to form triangular protrusions and convex pits, the triangular protrusions have two circles, each of which is arranged close to the outer end, and the triangular protrusions in each circle are equidistantly distributed, and a number of convex pits are distributed between the two circles of triangular protrusions; The process of the prism structure comprises the following steps: 1) Electroplating a base layer on the surface of the base roller, the base layer thickness is 800-1000um, and the hardness is 210-260HV; 2) The copper-plated base roller is placed to cool and kept at a constant temperature for 12-36 hours; 3) Use an ordinary precision lathe on the base roller frame to calibrate the base roller runout value within 5um, and use laser etching to carve out convex pits with a height of 20-25um, a length of 180-220um along the axis of the base roller, and a width of 40-60um; after the engraving is completed, use electropolishing to treat the surface of the base roller to remove the burrs left by the laser etching; 4) Replace the isosceles triangle diamond tool and carve equally spaced triangular protrusions with a base length of 60-80um and a height of 30-40um; 5) Surface atomization treatment.

2. The prism structure for a multi-layer laminating film according to claim 1, characterized in that: The thickness of the base layer is 800-1000um, and the hardness is 210-260HV.

3. The prism structure for a multi-layer laminating film according to claim 1, characterized in that: The base of the triangular protrusion is 60-80 um long and 30-40 um high.

4. The prism structure for a multi-layer laminating film according to claim 1, characterized in that: The interval between the two circles of triangular protrusions is 200-220um.

5. The prism structure for a multi-layer laminating film according to claim 1, characterized in that: The height of the convex pit is 20-25um, the length along the axis direction of the base roller is 180-220um, and the width is 40-60um.

6. The prism structure for a multi-layer laminating film according to claim 1, characterized in that: The tool is an isosceles triangle diamond tool, and the sharp angle of the isosceles triangle is 88-90 degrees.

7. The prism structure for a multi-layer laminating film according to claim 1, characterized in that: The surface of the prism structure is subjected to sandblasting and atomization treatment, and the atomization range is 90-98%.

8. The prism structure for a multi-layer laminating film according to claim 1, characterized in that: The transmittance of the prism structure is 90-95%.

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