Light-resistant curtain and preparation method thereof

Abstract

The invention discloses an anti-light curtain and a preparation method thereof, and the anti-light curtain sequentially comprises a front structure which is a linear structure or a common diffusion or hardening structure from top to bottom; the PET layer is positioned on the back surface of the front surface structure; the back surface of the PET layer is coated with the laminating glue layer, and the laminating glue layer is UV laminating glue with a high-viscosity formula; a microstructure layer; the microstructure layer is located on the upper surface of the polaroid and is attached to the back face of the attaching adhesive layer; the Fresnel structure is positioned on the back surface of the polaroid; the reflecting layer is sprayed on the back surface of the Fresnel structure; according to the invention, S light and stray light in ambient light are absorbed through the polaroid layer to achieve a good enough anti-light effect, the gain is maximized under the condition of ensuring the anti-light effect, the color flooding phenomenon of the polaroid is eliminated through the design of the middle microstructure layer, and the visual angle and the anti-speckle effect of the curtain are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field related to projection screens, and in particular relates to an anti-light screen and a preparation method thereof. Background Art

[0002] In recent years, the rapid development of the domestic audio-visual market has driven the continuous growth of the projection screen market. As the terminal of the projection system, projection screens are becoming more and more familiar to people as projection technology improves and projectors become more popular in education, engineering, business, and home. As a way of presenting images, the choice of screen type has a great impact on the final projection effect of audio and video.

[0003] Nowadays, more users like to watch the projection screen under brighter ambient light. However, the screen surface is easily affected by the ambient light, resulting in whitish, unclear and uneven images, which greatly reduces the contrast and brightness of the image and fails to achieve its own display or demonstration effect. In order to reduce the impact of stray light such as ambient light and natural light on the projection screen, a series of product solutions have been launched on the market to meet customers' needs for high definition, high contrast and better visual effects in bright environments.

[0004] The current mainstream anti-glare screen production method is to adjust the middle color layer or use colored primary color film to achieve anti-glare and contrast effects. If you want a good anti-glare effect, you need to reduce the transmittance of the color layer or primary color film to achieve this effect. However, this method will lose the brightness of the screen and cause RGB imbalance. In addition, in bright environments or under uneven lighting, the color layer or primary color film adjusted by dyes will cause uneven fading of the screen, resulting in local color difference. A screen production method that does not require color adjustment to achieve good anti-glare effects and high contrast is needed. Summary of the invention

[0005] The object of the present invention is to provide an anti-glare screen and a method for preparing the same, so as to solve the problem that the existing method proposed in the above-mentioned background technology will cause loss of screen brightness and RGB imbalance, and in a bright environment or under uneven lighting, the color layer or primary color film adjusted by dyes or the like will cause uneven fading of the screen, resulting in local color difference.

[0006] To achieve the above object, the present invention provides the following two technical solutions. In one technical solution:

[0007] An anti-glare curtain comprises, from top to bottom:

[0008] A front structure, wherein the front structure is a linear structure or a common diffusion or hardening structure;

[0009] A PET layer, located on the back side of the front structure;

[0010] A laminating adhesive layer, which is coated on the back of the PET layer and is a UV laminating adhesive with a high viscosity formula;

[0011] Microstructure layer;

[0012] A polarizer, wherein the microstructure layer is located on the upper surface of the polarizer and is bonded to the back surface of the bonding adhesive layer;

[0013] A Fresnel structure, located on the back of the polarizer;

[0014] The reflective layer is sprayed on the back of the Fresnel structure.

[0015] Preferably, PMMA microbeads or PBMA microbeads are dispersed in the glue of the bonding adhesive layer, and the particle size of the microbeads is 3-5 microns.

[0016] Preferably, the microstructure on the surface of the polarizer is a hemispherical honeycomb microstructure composed of a pitch1 structure and a pitch2 structure.

[0017] Preferably, the pitch1 structure is 300-400 pitch, with a height of 40-50 um, and the peak enters the bonding adhesive layer to a depth of 5-8 um, serving as a bonding structure with the bonding adhesive layer.

[0018] Preferably, the pitch 2 structure is 40-50 pitch, with a height of 20-40 um, a continuous arc shape and an arc diameter of 20 um, thereby forming a honeycomb structure.

[0019] Based on the above scheme, the present invention also proposes a method for preparing an anti-glare curtain, comprising the following steps:

[0020] Step 1: coating a layer of the hemispherical honeycomb microstructure on the upper surface of the polarizer, wherein a large pitch1 structure is provided in the middle of the hemispherical honeycomb structure as a support and is in contact with the bonding adhesive layer, the adjacent pitch of the structure is 300-400um, the height is 40-50um, and a small pitch2 structure of the hemispherical honeycomb structure is distributed in the middle;

[0021] Step 2: The PET layer is bonded to the hemispherical honeycomb microstructure using the bonding adhesive layer made of UV bonding adhesive with a special high-viscosity formula, and PMMA microbeads or PBMA microbeads with a particle size of 3-5 microns are dispersed in the bonding adhesive layer. The peak of the pitch1 structure enters the bonding adhesive layer at a depth of 5-8um. The PMMA microbeads or PBMA microbeads make the haze of the composite adhesive layer reach 10%-60%, preferably 20%-40%. The main purpose of adding microbeads to the UV bonding adhesive with a special high-viscosity formula is to eliminate the problem of polarizing and improve the speckle problem under the projection of the three-color projection host through the haze of the adhesive layer. The Fresnel structure and the reflective layer are directly made on the back of the polarizer;

[0022] Step 3, coating a linear structure or a common diffusion or hardening structure on the surface of the PET layer as the front structure;

[0023] Step 4: directly fabricate the Fresnel structure and the reflective layer on the back of the polarizer.

[0024] In another technical solution:

[0025] Preferably, the glue of the bonding adhesive layer does not contain microbeads.

[0026] Preferably, the microstructure on the surface of the polarizer is a columnar microstructure with a pitch of 38-100, a height of 10-30 um, an R angle of 20°, and the peak of the columnar microstructure enters the bonding adhesive layer to a depth of 2-3 um.

[0027] Based on the above scheme, the present invention also proposes a method for preparing an anti-glare curtain, comprising the following steps:

[0028] Step 1: coating a layer of columnar microstructure with a height of 10-30 um and a structural pitch of 38-100 um on the upper surface of the polarizer;

[0029] Step 2: Use a sandblasting machine to perform sandblasting and atomization treatment on the surface of the structure. The sandblasting machine sprays fine sand of glass beads. The continuous glass beads evenly hit the surface of the micro-concave structure, and irregular pits will be formed on the concave arc surface of the micro-structure, so that it can reach a certain degree of haze to meet the atomization and shielding effects. The main purpose is to eliminate the problem of polarizer flooding through the atomization effect;

[0030] Step 2: The PET layer is bonded to the columnar microstructure using the bonding adhesive layer made of UV bonding adhesive with a special high-viscosity formula, and the bonding adhesive layer does not contain microbeads, and the top of the columnar microstructure enters the bonding adhesive layer to a depth of 2-3 um;

[0031] Step 3, coating a linear structure or a common diffusion or hardening structure on the surface of the PET layer as the front structure;

[0032] Step 4: directly fabricate the Fresnel structure and the reflective layer on the back of the polarizer.

[0033] Compared with the prior art, the present invention provides an anti-glare curtain and a preparation method thereof, which has the following features:

[0034] Beneficial effects:

[0035] The present invention achieves a sufficiently good anti-light effect by absorbing S light and stray light in ambient light through the polarizer layer, and maximizes the gain under the condition of ensuring the anti-light effect. The intermediate microstructure layer design is used to eliminate the color blooming phenomenon of the polarizer and improve the viewing angle and anti-speckle effect of the screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0037] Figure 1 This is a schematic diagram of the anti-glare curtain structure proposed in the first embodiment of the present invention;

[0038] Figure 2 Schematic diagram of a pressing roller structure and a hemispherical honeycomb microstructure produced during the preparation of the surface of a polarizer in Example 1 of the present invention;

[0039] Figure 3 This is a schematic diagram of the anti-glare curtain structure proposed in the second embodiment of the present invention;

[0040] Figure 4 Schematic diagram of a pressure roller structure and a manufactured columnar microstructure during surface preparation of a polarizer in Example 1 of the present invention;

[0041] Figure 5 This is a schematic diagram of the anti-light principle of the anti-light curtain proposed in the present invention. DETAILED DESCRIPTION

[0042] 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.

[0043] Embodiment 1

[0044] See also Figure 1, an anti-glare curtain, the anti-glare curtain structure from top to bottom is respectively a front structure (linear structure or ordinary diffusion or hardening structure), a PET layer, the back of the PET layer is coated with a high-viscosity UV bonding glue, and PMMA microbeads with a particle size of 3-5 microns are dispersed in the glue, and the haze reaches 30%, and a hemispherical honeycomb microstructure is made on the surface of the polarizer, the pitch1 structure is 300pitch, the height is 40um, and the peak enters the bonding glue layer 5-8um deep (bonding structure), the pitch2 structure is 40pitch, the height is 20um, and the arc R is 20um (honeycomb structure), the back of the polarizer is made of Fresnel structure, and a reflective layer is sprayed on the surface of the Fresnel structure.

[0045] Based on the above scheme, the present invention also proposes a method for preparing an anti-glare curtain, comprising the following steps:

[0046] Step 1: coating a layer of the hemispherical honeycomb microstructure on the upper surface of the polarizer, wherein a large pitch1 structure is provided in the middle of the hemispherical honeycomb structure as a support and is in contact with the bonding adhesive layer, the adjacent pitch of the structure is 300-400um, the height is 40-50um, and a small pitch2 structure of the hemispherical honeycomb structure is distributed in the middle;

[0047] Step 2: The PET layer is bonded to the hemispherical honeycomb microstructure using the bonding adhesive layer made of UV bonding adhesive with a special high-viscosity formula, and PMMA microbeads or PBMA microbeads with a particle size of 3-5 microns are dispersed in the bonding adhesive layer, and the peak of the pitch1 structure enters the bonding adhesive layer to a depth of 5-8 um;

[0048] Step 3, coating a linear structure or a common diffusion or hardening structure on the surface of the PET layer as the front structure;

[0049] Step 4: directly fabricate the Fresnel structure and the reflective layer on the back of the polarizer.

[0050] Embodiment 2

[0051] See also Figure 3 , an anti-glare curtain, the anti-glare curtain structure from top to bottom is respectively a front structure (linear structure or ordinary diffusion or hardening structure), a PET layer, the back of the PET layer is coated with a high-viscosity UV bonding glue, the glue does not contain PMMA microbeads, a columnar microstructure is made on the surface of the polarizer, and the surface of the structure is atomized using a sandblasting machine. The structure has a 40 pitch, a height of 10um, an R angle of 20°, and the top of the columnar microstructure enters the bonding glue layer at a depth of 2-3um. A Fresnel structure is made on the back of the polarizer, and a reflective layer is sprayed on the surface of the Fresnel structure.

[0052] Based on the above scheme, the present invention also proposes a method for preparing an anti-glare curtain, comprising the following steps:

[0053] Step 1: coating a layer of columnar microstructure with a height of 10-30 um and a structural pitch of 38-100 um on the upper surface of the polarizer;

[0054] Step 2: Use a sandblasting machine to perform sandblasting atomization treatment on the surface of the structure. The sandblasting machine sprays fine sand of glass beads. The continuous glass beads evenly hit the surface of the micro-concave structure, and irregular pits will be formed on the concave arc surface of the micro-structure.

[0055] Step 2: The PET layer is bonded to the columnar microstructure using the bonding adhesive layer made of UV bonding adhesive with a special high-viscosity formula, and the bonding adhesive layer does not contain microbeads, and the top of the columnar microstructure enters the bonding adhesive layer to a depth of 2-3 um;

[0056] Step 3, coating a linear structure or a common diffusion or hardening structure on the surface of the PET layer as the front structure;

[0057] Step 4: directly fabricate the Fresnel structure and the reflective layer on the back of the polarizer.

[0058] Comparative Example 1 (Conventional Solution)

[0059] The screen structure in this technical solution is divided into a linear structure or a common diffusion or hardening structure, a PET base film layer, a color layer, a PET base film layer, a Fresnel lens layer, and a reflective layer from top to bottom (the color layer has a transmittance of 67%-72%). The anti-light and contrast effects are achieved by adjusting the color layer. The adjustment of the color layer will directly affect the gain effect. Under the exposure environment, uneven ambient light (partial sunlight, etc.) and ultraviolet light will form a risk of fading, causing local color difference and affecting the viewing effect.

[0060] Comparative Example 2 (Conventional Solution - High Gain)

[0061] From top to bottom, it is divided into linear structure or ordinary diffusion or hardening structure, primary color film layer, Fresnel lens layer, and reflection layer (color layer transmittance 73%-76%). The anti-light and contrast effects are achieved by the color depth of the primary color film. The primary color film also has the risk of light fading and color difference.

[0062] The following data were obtained through experiments with the above examples and comparative examples and repeated research and demonstration:

[0063]

[0064] From the above table, it can be seen that the anti-light effect is not achieved by adjusting the color layer ratio. There is sufficient gain space for matching a variety of structural combinations to achieve optical effects such as optimized viewing angle and speckle. However, the conventional solution will lose the anti-light effect when high gain is required; the present invention uses a polarizer as a substrate to absorb S light in ambient light to achieve the anti-light effect. There is no color layer to reduce the gain effect. While ensuring high gain, the microstructure coated on the surface is matched with the particle ratio in the glue layer and sandblasting is performed on the microstructure to increase the atomization effect, which can effectively increase the viewing angle and adjust the speckle effect, and at the same time eliminate the flooding effect of the polarizer.

[0065] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-glare curtain, characterized in that: From top to bottom, they include: A front structure, wherein the front structure is a linear structure or a common diffusion or hardening structure; A PET layer, located on the back side of the front structure; A laminating adhesive layer, which is coated on the back of the PET layer and is a UV laminating adhesive with a high viscosity formula; Microstructure layer; A polarizer, wherein the microstructure layer is located on the upper surface of the polarizer and is bonded to the back surface of the bonding adhesive layer; A Fresnel structure, located on the back of the polarizer; The reflective layer is sprayed on the back of the Fresnel structure.

2. The anti-glare curtain according to claim 1, characterized in that: PMMA microbeads or PBMA microbeads are dispersed in the glue of the bonding adhesive layer, and the particle size of the microbeads is 3-5 microns.

3. The anti-glare curtain according to claim 2, characterized in that: The microstructure on the surface of the polarizer is a hemispherical honeycomb microstructure composed of a pitch1 structure and a pitch2 structure.

4. The anti-glare curtain according to claim 3, characterized in that: The pitch1 structure is 300-400 pitch, with a height of 40-50 um, and the top enters the bonding adhesive layer to a depth of 5-8 um, serving as a bonding structure with the bonding adhesive layer.

5. The anti-glare curtain according to claim 3, characterized in that: The pitch2 structure is 40-50 pitch, 20-40um in height, in a continuous arc shape with an arc diameter of 20um, thereby forming a honeycomb structure.

6. The anti-glare curtain according to claim 1, characterized in that: The glue in the bonding adhesive layer does not contain micro beads.

7. The anti-glare curtain according to claim 6, characterized in that: The microstructure on the surface of the polarizer is a columnar microstructure with a pitch of 38-100, a height of 10-30 um, an R angle of 20°, and the top of the columnar microstructure penetrates into the bonding adhesive layer to a depth of 2-3 um.

8. A method for preparing an anti-glare curtain, according to the anti-glare curtain of claim 5, characterized in that: The following steps are involved: Step 1: coating a layer of the hemispherical honeycomb microstructure on the upper surface of the polarizer, wherein a large pitch1 structure is provided in the middle of the hemispherical honeycomb structure as a support and is in contact with the bonding adhesive layer, the adjacent pitch of the structure is 300-400um, the height is 40-50um, and a small pitch2 structure of the hemispherical honeycomb structure is distributed in the middle; Step 2: The PET layer is bonded to the hemispherical honeycomb microstructure using the bonding adhesive layer made of UV bonding adhesive with a special high-viscosity formula, and PMMA microbeads or PBMA microbeads with a particle size of 3-5 microns are dispersed in the bonding adhesive layer, and the peak of the pitch1 structure enters the bonding adhesive layer to a depth of 5-8 um; Step 3, coating a linear structure or a common diffusion or hardening structure on the surface of the PET layer as the front structure; Step 4: directly fabricate the Fresnel structure and the reflective layer on the back of the polarizer.

9. A method for preparing an anti-glare curtain, according to the anti-glare curtain of claim 7, characterized in that: The following steps are involved: Step 1: coating a layer of columnar microstructure with a height of 10-30 um and a structural pitch of 38-100 um on the upper surface of the polarizer; Step 2: Use a sandblasting machine to perform sandblasting atomization treatment on the surface of the structure. The sandblasting machine sprays fine sand of glass beads. The continuous glass beads evenly hit the surface of the micro-concave structure, and irregular pits will be formed on the concave arc surface of the micro-structure. Step 2: The PET layer is bonded to the columnar microstructure using the bonding adhesive layer made of UV bonding adhesive with a special high-viscosity formula, and the bonding adhesive layer does not contain microbeads, and the top of the columnar microstructure enters the bonding adhesive layer to a depth of 2-3 um; Step 3, coating a linear structure or a common diffusion or hardening structure on the surface of the PET layer as the front structure; Step 4: directly fabricate the Fresnel structure and the reflective layer on the back of the polarizer.

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