A cutting method for a multi-layer composite optical film glass diffuser plate

Abstract

The present invention discloses a method for cutting a multi-layer composite optical film glass diffuser plate; the diffuser plate comprises: a glass substrate, a diffusion layer, an optical adhesive layer, and a composite optical film layer; the diffusion layer, the optical adhesive layer, and the composite optical film layer are sequentially stacked on the surface of the glass substrate; the composite optical film layer comprises at least one prism film layer; the cutting method comprises: cutting the diffuser plate by using an oblique laser on the top of the composite optical film layer, the oblique laser being used to prevent the edge of the composite optical film from being closed due to edge melting, thereby isolating the air layer in the film layer from the outside. The cutting method of the present invention uses an oblique laser cutting method to avoid the air layer in the compound diffuser plate from being closed. The cutting method of the present invention does not produce too many laser ablation areas, does not cause the air layer in the composite optical film to be closed, and avoids the optical film layer of the diffuser plate from being delaminated due to the lack of air circulation inside and outside and the thermal expansion and contraction of the environment, thereby affecting the appearance and optical effect of the diffuser plate.

Description

Technical Field

[0001] The present invention relates to the technical field of glass diffuser plates, and in particular to a cutting method for a multi-layer composite optical film glass diffuser plate. Background Art

[0002] A composite diffuser plate can be obtained by bonding a composite optical film to a direct-type diffuser plate through optical adhesive. The composite diffuser plate has many advantages such as thinness, fewer assembly steps, and excellent optical image quality. It is widely used in the high-end thin display and splicing display screen markets. The bonding process of composite diffuser plates is generally roll-to-sheet and sheet-to-sheet bonding. The roll-to-sheet bonding process is highly efficient, but the part of the film that exceeds the diffuser plate needs to be cut off after the roll is bonded. The sheet-to-sheet bonding process is inefficient, and there is a certain tolerance in the bonding, which can easily lead to positional offset between the film and the glass of the same size at the edge. If a large-sized film is used to bond a small-sized diffuser plate, the part of the film that exceeds the diffuser plate still needs to be cut. In order to achieve the effect of the film and the edge of the diffuser plate being flush, laser edge cutting is currently used. However, the current laser cutting method is mostly perpendicular to the surface of the composite optical film. This cutting method will cause the laser cutting point and the surrounding non-cutting points to cause local melting of the composite optical film at the non-cutting points due to the refraction of the laser, and block the air layer in the composite optical film. When the inside of the film material is not circulated with the outside air, the thermal barrier and shrinkage can easily lead to delamination between the multi-layer film materials bonded by the colloid inside the composite optical film, affecting the light effect and appearance of the diffuser plate. Summary of the Invention

[0003] The purpose of the present invention is to address the problems existing in the current composite diffuser plate cutting process and to provide a cutting method for a multi-layer composite optical film glass diffuser plate. The method is simple in process and laser cutting is performed by injecting a laser at an angle relative to the inclination direction of the multi-layer composite optical film glass diffuser plate. This method can effectively avoid the problem of air layer blockage caused by the melting of the four edges of the film material in the composite diffuser plate when the laser is injected perpendicular to the composite diffuser plate for cutting, as well as the problem of reduced light efficiency and appearance of the diffuser plate.

[0004] The present invention is achieved through the following technical solutions:

[0005] A method for cutting a multi-layer composite optical film glass diffuser plate is characterized in that the multi-layer composite optical film glass diffuser plate comprises: a glass substrate, a diffusion layer, an optical adhesive layer, and a composite optical film layer; the diffusion layer, optical adhesive layer, and composite optical film layer are sequentially stacked and disposed on the surface of the glass substrate; the composite optical film layer comprises at least one prismatic film layer; and the cutting method comprises: using an oblique laser to cut the composite optical film layer in the multi-layer composite optical film glass diffuser plate above the composite optical film layer. The use of an oblique laser for cutting in the present invention can prevent the edge of the composite optical film from being sealed due to edge melting, thereby isolating the air layer in the film layer from the outside world.

[0006] Wherein: the size of the composite optical film layer is larger than that of the glass substrate, that is, the edge of the composite optical film layer needs to be cut off to make it flush with the edge of the glass substrate.

[0007] Specifically, the multi-layer composite optical film glass diffuser plate is cut by laser cutting at an angle above the composite optical film layer. The laser's tilt angle is perpendicular to the hypotenuse of the prism, so that the laser can be incident vertically after striking the prism. The method of the present invention uses laser bevel cutting to avoid the occlusion of the air layer in the film layer of the composite diffuser plate. The laser cutting method of the present invention does not produce excessive laser ablation areas, which will not lead to the occlusion of the air layer in the composite optical film layer. This avoids the composite optical film layer of the diffuser plate from delamination due to lack of internal and external air circulation and thermal expansion and contraction of the environment, which can affect the appearance and optical effect of the diffuser plate.

[0008] Specifically, due to the presence of an air layer in the composite optical film layer, when laser cutting is performed using the existing process, the laser will vertically penetrate the prism film in the composite optical film and then undergo multiple refractions. In addition to ablating the composite optical film at the local laser cutting point, it will also ablate the composite optical film at the peripheral points after the laser refraction. The melted portion after ablation will block the original air layer in the composite optical film, resulting in the air layer in the film material being unable to circulate with the outside world. Environmental and seasonal changes can cause the composite optical film layer to delaminate due to thermal expansion and contraction, thereby affecting the light effect and appearance of the diffuser plate. In response to the many problems existing in the existing cutting methods, the present invention provides a new process that avoids the above problems by means of laser bevel cutting. The laser cutting method of the present invention will not produce too many laser ablation areas, will not cause large-area air layer blockage, will have no effect on the light diffusion effect of the composite diffuser plate after bonding, and will not cause the composite optical film to delaminate due to air layer blockage.

[0009] Specifically, in the process of the present invention, the laser inclination angle is a specific angle perpendicular to the hypotenuse of the prism film in the composite optical film, so that after the laser hits the prism film, it can be incident vertically, avoiding refraction after the laser enters the inside of the film material, improving the laser cutting efficiency, and will not cause the heat range to diffuse and the film material to melt, which will cause serious yellow edges; the laser bevel cutting process of the present invention will not cause the four edges of the composite optical film to be sealed due to melting, and will not cause the air layer inside the optical film to be isolated from the outside air. If the four edges of the composite optical film are sealed, there is no air circulation inside and outside the composite film, and the thermal expansion and contraction due to weather changes will cause the film material to be stratified, affecting the light effect and appearance of the manufactured diffusion plate.

[0010] Furthermore, a method for cutting a multi-layer composite optical film glass diffuser plate is provided: the thickness of the glass substrate is 0.5-1.5 mm.

[0011] Furthermore, a method for cutting a multi-layer composite optical film glass diffuser plate is provided: the diffusion layer includes: a first diffusion layer and a second diffusion layer; the first diffusion layer and the second diffusion layer are respectively arranged on two opposite surfaces of the glass substrate; the second diffusion layer, the optical adhesive layer and the composite optical film layer are sequentially stacked on the surface of the glass substrate.

[0012] Furthermore, a cutting method for a multi-layer composite optical film glass diffuser plate is provided: the manufacturing process of the multi-layer composite optical film glass diffuser plate comprises the following steps:

[0013] S1, cutting and edge grinding the glass substrate;

[0014] S2, printing a diffusion material on one side of the glass substrate to form the first diffusion layer; and printing a diffusion material on a side of the glass substrate opposite to the first diffusion layer to form the second diffusion layer;

[0015] S3. Lay the optical adhesive layer and the light incident surface of the composite optical film layer together to obtain a composite optical film layer with adhesive backing, and then laminate the composite optical film layer with adhesive backing to the second diffusion layer to obtain a multi-layer composite optical film glass diffusion plate; wherein: the four sides of the glass substrate are 5-15 mm smaller than the composite optical film layer with adhesive backing.

[0016] Furthermore, a method for cutting a multi-layer composite optical film glass diffuser plate: the thickness of the first diffuser layer and the second diffuser layer is 5-20 μm.

[0017] Furthermore, a cutting method for a multi-layer composite optical film glass diffuser plate is provided: the thickness of the optical adhesive layer is 5-75 μm; and the light transmittance of the optical adhesive layer is not less than 90%.

[0018] Furthermore, a method for cutting a multi-layer composite optical film glass diffuser plate: the composite optical film layer is selected from any one of CPP, DPP, COP, and MOP.

[0019] Furthermore, a cutting method for a multi-layer composite optical film glass diffuser plate is provided: the laser spot diameter is 5-15 μm, the laser power is 10-30 W, and the laser wavelength is 800-1200 nm.

[0020] Furthermore, a method for cutting a multi-layer composite optical film glass diffuser plate is provided in which the laser is tilted at an angle perpendicular to the hypotenuse of the prism film in the composite optical film layer, so that the laser can be incident vertically after hitting the prism.

[0021] Beneficial effects of the present invention:

[0022] The multi-layer composite optical film of the present invention includes at least one layer of prismatic film. After adopting the cutting process of the present invention and the laser bevel cutting method of the present invention, excessive laser ablation areas are not generated, the film material is melted less, and the original air layer in the composite optical film is not blocked by the melting of the film material. This prevents the air layer in the film from being unable to circulate with the outside world, thus avoiding delamination of the composite optical film layer in the diffuser due to lack of internal and external air circulation and thermal expansion and contraction of the environment, and does not affect the appearance and optical effect of the diffuser. The process of the present invention is simple and does not incur additional costs compared to existing processes. Most importantly, the process of the present invention can avoid clogging of the air layer in the composite optical film layer during laser cutting, and does not cause delamination of the composite optical film layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 This is a schematic structural diagram of the multi-layer composite optical film glass diffuser plate of the present invention;

[0025] Figure 2 A schematic diagram of the operation of a cutting method for a multi-layer composite optical film glass diffuser plate provided by the present invention;

[0026] Figure 3 It is a schematic structural diagram of a multi-layer composite optical film glass diffuser plate after being cut using the cutting method of the present invention.

[0027] Markings in the figure: 1 glass substrate, 2 diffusion layer, 2-1 first diffusion layer, 2-2 second diffusion layer, 3 optical adhesive layer, 4 composite optical film layer, 4-1 lower prism film, 4-2 adhesive layer, 4-3 upper prism film, 4-4 diffusion film layer. DETAILED DESCRIPTION

[0028] The following will be combined with the accompanying 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 embodiments described are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom", etc., indicating directions or positional relationships, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Moreover, the terms "first", "second", etc. are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

[0030] Example 1

[0031] like Figure 1-2 A method for cutting a multi-layer composite optical film glass diffuser plate is shown, characterized in that the multi-layer composite optical film glass diffuser plate comprises: a glass substrate 1, a diffusion layer 2, an optical adhesive layer 3, and a composite optical film layer 4; the diffusion layer 2, the optical adhesive layer 3, and the composite optical film layer 4 are sequentially stacked on the surface of the glass substrate 1; the composite optical film layer 4 is a DPP structure, including two layers of prism film; the four sides of the composite optical film layer 4 are slightly larger than the four sides of the glass substrate 1 by about 10 mm;

[0032] The method for cutting the multi-layer composite optical film glass diffuser plate is as follows: the composite optical film layer 4 in the multi-layer composite optical film glass diffuser plate is cut by an oblique laser above the composite optical film layer 4 (note: the inclination angle of the laser bevel here is perpendicular to the oblique edge of the prism structure in the prism film in the composite optical film layer 4), and the composite optical film layer 4 that is larger than the original size of the glass substrate 1 is cut to be flush with the edge of the glass substrate 1 by an oblique laser. The laser bevel cutting method used in the present invention can be used to prevent the air layer in the composite optical film layer 4 from being blocked, and the laser bevel cutting method can avoid the composite optical film in the composite diffuser plate from being blocked. The air layer in the film layer 4 is sealed, and the laser cutting method of the present invention will not produce too many laser ablation areas, and will not cause the air layer in the composite optical film 4 to be sealed, thereby avoiding the optical film layer of the diffuser plate from being delaminated due to the lack of air circulation inside and outside and the thermal expansion and contraction of the environment, thereby affecting the appearance and optical effect of the diffuser plate; preferably, in the cutting method of the present invention, the laser spot diameter is 10μm, the laser power is 15W, and the laser wavelength is 980nm; the laser bevel cutting process of the present invention can avoid the melting of the film layer and effectively avoid the blockage of the air layer in the composite optical film; the structure of the multi-layer composite optical film glass diffuser plate after cutting of the present invention is as follows Figure 3 shown.

[0033] Preferably, the thickness of the glass substrate 1 in the above embodiment 1 is 1.0 mm.

[0034] Specifically, the diffusion layer 2 in the above-mentioned embodiment 1 includes: a first diffusion layer 2-1 and a second diffusion layer 2-2 (wherein: the thickness of the first diffusion layer 2-1 and the second diffusion layer 2-2 are both set to 10 μm); the first diffusion layer 2-1 and the second diffusion layer 2-2 are respectively arranged on two opposite surfaces of the glass substrate 1; the second diffusion layer 2-2, the optical adhesive layer 3 and the composite optical film layer 4 are stacked in sequence on the surface of the glass substrate 1.

[0035] Specifically, the thickness of the optical adhesive layer 3 in the above embodiment 1 is set to 30 μm, and the light transmittance of the optical adhesive layer 3 is not less than 90%.

[0036] Specifically, such as Figure 1As shown, the composite optical film layer 4 (DPP structure) described in the above embodiment 1 includes: a lower prism film 4-1, an adhesive layer 4-2, an upper prism film 4-3, an adhesive layer 4-2 and a diffusion film layer 4-4 (the DPP structure contains two adhesive layers); the lower prism film 4-1, the adhesive layer 4-2, the upper prism film 4-3, the adhesive layer 4-2 and the diffusion film layer 4-4 are stacked in sequence from bottom to top; an air layer is formed between the adhesive layer 4-2 and the lower prism film 4-1 and the upper prism film 4-3; the prism lines in the upper prism film 4-3 are arranged perpendicular to the prism lines in the lower prism film 4-1; the lower prism film 4-1 is bonded to the optical adhesive layer 3.

[0037] The structural diagram of the multi-layer composite optical film glass diffuser plate cut by the method of the present invention is as follows: Figure 1 As shown; the manufacturing process of the multi-layer composite optical film glass diffuser plate includes the following steps:

[0038] S1, cutting, grinding, cleaning and setting aside the glass substrate 1;

[0039] S2, printing a diffusion material on one side of the glass substrate 1 to form the first diffusion layer 2-1; and continuing to print a diffusion material on a side of the glass substrate 1 opposite to the first diffusion layer 2-1 to form the second diffusion layer 2-2;

[0040] S3. Lay the optical adhesive layer 3 and the light incident surface of the composite optical film layer 4 in a roll-to-roll manner to obtain the composite optical film layer 4 with adhesive backing, and then laminate the composite optical film layer 4 with adhesive backing to the second diffusion layer 2-2 in a roll-to-sheet or sheet-to-sheet manner to obtain a multi-layer composite optical film glass diffusion plate; wherein, the four sides of the glass substrate 1 are smaller than the four sides of the composite optical film layer 4 with adhesive backing by about 10 mm; wherein: the four sides of the composite optical film layer 4 with adhesive backing that extend beyond the glass substrate 1 need to be cut off by laser, and after cutting, the edge of the film material is flush with the edge of the glass substrate 1.

[0041] The above preferred embodiments of the present invention are only used to explain the present invention and are not used to limit the present invention. Any obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A method for cutting a multi-layer composite optical film glass diffuser plate, characterized in that: The multi-layer composite optical film glass diffuser plate comprises: a glass substrate (1), a diffusion layer (2), an optical adhesive layer (3), and a composite optical film layer (4); The diffusion layer (2), the optical adhesive layer (3) and the composite optical film layer (4) are sequentially stacked on the surface of the glass substrate (1); the composite optical film layer (4) comprises at least one layer of prism film; the cutting method comprises: cutting the composite optical film layer (4) in the multi-layer composite optical film glass diffusion plate by an oblique laser above the composite optical film layer (4), wherein the inclination angle of the laser is perpendicular to the oblique side of the prism structure in the prism film in the composite optical film layer (4), and the four sides of the glass substrate (1) are 5 to 15 mm smaller than the composite optical film layer (4); The thickness of the optical adhesive layer (3) is 5 to 75 μm, and the light transmittance of the optical adhesive layer (3) is not less than 90%; the composite optical film layer (4) is selected from any one of CPP, DPP, COP, and MOP; the spot diameter of the laser is 5 to 15 μm, the laser power is 10 to 30 W, and the laser wavelength is 800 to 1200 nm.

2. The method for cutting a multi-layer composite optical film glass diffuser plate according to claim 1, characterized in that: The thickness of the glass substrate (1) is 0.5-1.5 mm.

3. The method for cutting a multi-layer composite optical film glass diffuser plate according to claim 1, characterized in that: The diffusion layer (2) comprises: a first diffusion layer (2-1) and a second diffusion layer (2-2); The first diffusion layer (2-1) and the second diffusion layer (2-2) are respectively arranged on two opposite surfaces of the glass substrate (1); the second diffusion layer (2-2), the optical adhesive layer (3) and the composite optical film layer (4) are sequentially stacked and arranged on the surface of the glass substrate (1).

4. The method for cutting a multi-layer composite optical film glass diffuser plate according to claim 3, characterized in that: The manufacturing process of the multi-layer composite optical film glass diffuser plate includes the following steps: S1, cutting and edge grinding the glass substrate (1); S2, printing a diffusion material on one side of the glass substrate (1) to form the first diffusion layer (2-1); printing a diffusion material on a side of the glass substrate (1) opposite to the first diffusion layer (2-1) to form the second diffusion layer (2-2); S3, laminating the optical adhesive layer (3) and the light incident surface of the composite optical film layer (4) to obtain the adhesive-backed composite optical film layer (4), and then laminating the adhesive-backed composite optical film layer (4) to the second diffusion layer (2-2) to obtain a multi-layer composite optical film glass diffusion plate; Wherein: the four sides of the glass substrate (1) are 5 to 15 mm smaller than the adhesive-backed composite optical film layer (4).

5. The method for cutting a multi-layer composite optical film glass diffuser plate according to claim 3 or 4, characterized in that: The thickness of the first diffusion layer (2-1) and the second diffusion layer (2-2) is 5 to 20 μm.

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