Anti-light curtain and preparation method therefor
By using a combination of polarizers and microstructure layers in the anti-glare screen, the problems of unclear images and RGB imbalance caused by ambient light effects are solved, achieving high contrast and brightness anti-glare effects and optimizing visual performance.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- CCS (SHANGHAI) FUNCTIONAL FILMS IND CO LTD
- Filing Date
- 2025-06-27
- Publication Date
- 2026-07-02
AI Technical Summary
Existing ambient light rejecting screens are easily affected by ambient light in bright environments, resulting in washed-out, unclear, and uneven images, reducing image contrast and brightness. Furthermore, color adjustment through color adjustment layers or primary color films can cause RGB imbalance and local color differences.
Using polarizing film as the substrate, combined with special high-adhesion UV adhesive and microstructure layer, it absorbs S-rays in ambient light, and by combining Fresnel structure and reflective layer, eliminates the color cast problem of polarizing film, increases haze and viewing angle, and optimizes visual effect.
While maintaining high gain, the influence of ambient light was reduced, RGB imbalance and local color difference were avoided, the contrast and brightness of the image were improved, and the visual effect was optimized.
Smart Images
Figure CN2025104528_02072026_PF_FP_ABST
Abstract
Description
An anti-light curtain and its preparation method Technical Field
[0001] This invention belongs to the technical field of projection screens, specifically relating to an anti-glare screen and its preparation method. Background Technology
[0002] The rapid development of the audio-visual market has driven the continuous expansion of the projection screen market. As the terminal of a projection system, projection screens have become increasingly familiar to people with the improvement of projection technology and the popularization of projectors in education, engineering, commerce, and home use. As a way of presenting images, the choice of screen type has a significant impact on the final audio-visual playback effect.
[0003] Nowadays, more users prefer to view projected images in bright ambient light. However, the surface of the projection screen is easily affected by ambient light, resulting in a washed-out, unclear, and uneven image. This significantly reduces the contrast and brightness of the image, failing to achieve the intended display or presentation effect. To reduce the impact of stray light, such as ambient and natural light, on projection screens, 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 inventor is aware of a method for manufacturing anti-glare screens that involves adjusting the intermediate color layer or using a colored primary color film to achieve anti-glare and contrast effects. To achieve good anti-glare effects, the transmittance of the color layer or primary color film needs to be reduced. However, this method will reduce the brightness of the screen and cause RGB imbalance. Furthermore, in bright environments or under uneven lighting, the color layer or primary color film, which is colored by dyes, will cause uneven fading of the screen, resulting in local color differences. Therefore, a method for manufacturing screens that can achieve good anti-glare effects and high contrast without color adjustment is needed. Summary of the Invention
[0005] The purpose of this invention is to provide an anti-glare screen and its preparation method, so as to solve the problems mentioned in the background art, which are that the existing methods will lose the brightness of the screen and cause RGB imbalance, and that the color layer or primary color film with dyes or other color-matching will cause uneven fading of the screen and form local color difference in bright environment or under uneven lighting.
[0006] To achieve the above objectives, the present invention provides the following two technical solutions, in one of which:
[0007] An anti-glare screen, comprising, from top to bottom: a front structure, which is either a linear structure or a common diffusion or hardening structure; a PET layer located on the back of the front structure; an adhesive layer coated on the back of the PET layer, the adhesive layer being a high-viscosity UV adhesive; a microstructure layer; a polarizer, the microstructure layer being located on the upper surface of the polarizer and bonded to the back of the adhesive layer; a Fresnel structure located on the back of the polarizer; and a reflective layer sprayed onto the back of the Fresnel structure.
[0008] In one embodiment, PMMA microspheres or PBMA microspheres are dispersed in the adhesive layer, and the microspheres have a particle size of 3-5 micrometers.
[0009] In one embodiment, the microstructure on the surface of the polarizer is a hemispherical honeycomb microstructure composed of pitch1 structure and pitch2 structure.
[0010] In one embodiment, the pitch1 structure has a pitch of 300-400 and a height of 40-50 μm, with the apex penetrating 5-8 μm into the adhesive layer, serving as the bonding structure with the adhesive layer.
[0011] In one embodiment, the pitch2 structure is 40-50 pitches, with a height of 20-40 μm, and is a continuous arc shape with an arc diameter of 20 μm, thereby forming a honeycomb structure.
[0012] Based on the above solution, the present invention also proposes a method for preparing an anti-glare screen, comprising the following steps:
[0013] Step 1: Coat the upper surface of the polarizer with a layer of the hemispherical honeycomb microstructure. The hemispherical honeycomb structure has a large pitch1 structure in the middle as a support and is in contact with the adhesive layer. The adjacent pitches of this structure are 300-400um and the height is 40-50um. Small pitch2 structures are distributed in the middle of the hemispherical honeycomb structure.
[0014] Step 2: The PET layer is bonded to the hemispherical honeycomb microstructure using a special high-viscosity UV bonding adhesive layer. The bonding adhesive layer contains PMMA or PBMA microspheres with a particle size of 3-5 micrometers. The peak of the pitch1 structure penetrates 5-8 μm into the bonding adhesive layer. The PMMA or PBMA microspheres make the haze of the composite adhesive layer reach 10%-60%, preferably 20%-40%. The main purpose of adding microspheres to the special high-viscosity UV bonding adhesive is to eliminate the color cast problem of the polarizer and to improve the speckle problem under the projection of the three-color projector by reducing the haze of the adhesive layer. The Fresnel structure and reflective layer are directly fabricated on the back of the polarizer.
[0015] Step 3: Coat the surface of the PET layer with either a linear structure or a common diffusion or hardening structure as the front structure;
[0016] Step 4: The Fresnel structure and reflective layer are fabricated directly on the back of the polarizer.
[0017] In another technical solution:
[0018] In one embodiment, the adhesive layer contains no microbeads.
[0019] In one embodiment, the microstructure on the surface of the polarizer is a columnar microstructure with a pitch of 38-100, a height of 10-30 μm, and an radius of 20°. The peak of the columnar microstructure penetrates 2-3 μm into the adhesive layer.
[0020] Based on the above solution, the present invention also proposes a method for preparing an anti-glare screen, comprising the following steps:
[0021] Step 1: Coat the upper surface of the polarizer with a columnar microstructure with a height of 10-30 μm and a structural pitch of 38-100 μm.
[0022] Step 2: Use a sandblasting machine to perform sandblasting and atomization treatment on the surface of the structure. The sandblasting machine sprays out fine sand of glass beads. The glass beads continuously and evenly impact the surface of the micro-concave structure, forming irregular pits on the concave arc surface of the micro-structure, so as to achieve a certain degree of haze and meet the atomization and masking effect. The main purpose is to eliminate the problem of color tinting of the polarizer through the atomization effect.
[0023] Step 2: The PET layer is bonded to the columnar microstructure using a special high-viscosity UV bonding adhesive layer, and the bonding adhesive layer does not contain microbeads, with the apex of the columnar microstructure penetrating the bonding adhesive layer to a depth of 2-3 μm.
[0024] Step 3: Coat the surface of the PET layer with either a linear structure or a common diffusion or hardening structure as the front structure;
[0025] Step 4: The Fresnel structure and reflective layer are fabricated directly on the back of the polarizer. Attached Figure Description
[0026] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention, but do not constitute a limitation thereof. In the drawings:
[0027] Figure 1 is a schematic diagram of the anti-light curtain structure proposed in Embodiment 1 of the present invention;
[0028] Figure 2 is a schematic diagram of the pressure roller structure and the hemispherical honeycomb microstructure produced during the preparation of the polarizer surface in Embodiment 1 of the present invention.
[0029] Figure 3 is a schematic diagram of the anti-light curtain structure proposed in Embodiment 2 of the present invention;
[0030] Figure 4 is a schematic diagram of the pressure roller structure and the columnar microstructure produced during the preparation of the polarizer surface in Embodiment 1 of the present invention.
[0031] Figure 5 is a schematic diagram of the anti-light principle of the anti-light curtain proposed according to one or more embodiments of the present invention. Detailed Implementation
[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0033] Example 1
[0034] Please refer to Figure 1. An anti-glare screen has the following structure from top to bottom: a front structure (linear structure, ordinary diffusion, or hardening structure), a PET layer, a UV bonding adhesive with a high-viscosity formulation coated on the back of the PET layer, PMMA microspheres with a particle size of 3-5 micrometers dispersed in the adhesive, achieving a haze of 30%, a hemispherical honeycomb microstructure composed of pitch1 and pitch2 structures on the surface of the polarizer, a 300-pitch structure with a height of 40 μm and a peak penetrating 5-8 μm into the bonding adhesive layer (bonding structure), a 40-pitch structure with a height of 20 μm and an arc radius of 20 μm (honeycomb structure), a Fresnel structure on the back of the polarizer, and a reflective layer sprayed on the surface of the Fresnel structure.
[0035] Based on the above solution, the present invention also proposes a method for preparing an anti-glare screen, comprising the following steps:
[0036] Step 1: Coat the upper surface of the polarizer with a layer of the hemispherical honeycomb microstructure. The hemispherical honeycomb structure has a large pitch1 structure in the middle as a support and is in contact with the adhesive layer. The adjacent pitches of this structure are 300-400um and the height is 40-50um. Small pitch2 structures are distributed in the middle of the hemispherical honeycomb structure.
[0037] Step 2: The PET layer is bonded to the hemispherical honeycomb microstructure using a special high-viscosity UV bonding adhesive layer, and the bonding adhesive layer contains PMMA or PBMA microspheres with a particle size of 3-5 micrometers, and the peak of the pitch1 structure penetrates to a depth of 5-8 μm in the bonding adhesive layer.
[0038] Step 3: Coat the surface of the PET layer with either a linear structure or a common diffusion or hardening structure as the front structure;
[0039] Step 4: The Fresnel structure and reflective layer are fabricated directly on the back of the polarizer.
[0040] Example 2
[0041] Please refer to Figure 3. An anti-glare screen has the following structure from top to bottom: a front structure (linear structure, ordinary diffusion, or hardening structure), a PET layer, a UV bonding adhesive with a high-viscosity formulation coated on the back of the PET layer (the adhesive does not contain PMMA microspheres), a columnar microstructure on the surface of the polarizer, and a sandblasting treatment to atomize the structure surface. The structure has a 40-pitch, a height of 10µm, and an R-angle of 20°. The peaks of the columnar microstructures penetrate 2-3µm into the bonding adhesive layer. A Fresnel structure is formed on the back of the polarizer, and a reflective layer is sprayed onto the surface of the Fresnel structure.
[0042] Based on the above solution, the present invention also proposes a method for preparing an anti-glare screen, comprising the following steps:
[0043] Step 1: Coat the upper surface of the polarizer with a columnar microstructure with a height of 10-30 μm and a structural pitch of 38-100 μm.
[0044] Step 2: Use a sandblasting machine to atomize the surface of the structure. The sandblasting machine sprays out fine glass beads, which continuously and evenly impact the surface of the micro-concave structure, forming irregular pits on the concave arc surface of the micro-structure.
[0045] Step 2: The PET layer is bonded to the columnar microstructure using a special high-viscosity UV bonding adhesive layer, and the bonding adhesive layer does not contain microbeads, with the apex of the columnar microstructure penetrating the bonding adhesive layer to a depth of 2-3 μm.
[0046] Step 3: Coat the surface of the PET layer with either a linear structure or a common diffusion or hardening structure as the front structure;
[0047] Step 4: The Fresnel structure and reflective layer are fabricated directly on the back of the polarizer.
[0048] Comparative Example 1 (A solution known to the inventor)
[0049] The screen structure in this technical solution consists of, from top to bottom, a linear structure or a common diffusion or hardening structure, a PET base film layer, a color layer, another PET base film layer, a Fresnel lens layer, and a reflective layer (the color layer has a transmittance of 67%-72%). Anti-glare and contrast effects are achieved by adjusting the color layer. Adjusting the color layer directly affects the gain effect. Under uneven ambient light (partial sunlight, etc.) and ultraviolet light, there is a risk of fading, causing localized color differences and affecting the viewing experience.
[0050] Comparative Example 2 (A solution known to the inventor - high gain)
[0051] From top to bottom, it consists of a linear structure or a common diffusion or hardening structure, a primary color film layer, a Fresnel lens layer, and a reflective layer (the color layer has a transmittance of 73%-76%). The anti-light and contrast effects are achieved by the depth of color of the primary color film. The primary color film is also subject to the risk of fading and color difference under light.
[0052] Through experiments conducted using the above embodiments and comparative examples, and through repeated research and verification, the following data was obtained:
[0053] As shown in the table above, the anti-glare effect is not achieved by adjusting the proportion of the color layer. There is ample gain space for various structural combinations to optimize optical effects such as viewing angle and speckle. Conventional solutions sacrifice anti-glare effect when high gain is required. This invention uses a polarizer as the substrate to absorb S-rays from ambient light to achieve anti-glare effect. There is no color layer to reduce gain, ensuring high gain. At the same time, by combining the microstructure of the surface coating with the particle ratio in the adhesive layer and sandblasting the microstructure to increase the atomization effect, the viewing angle can be effectively increased and the speckle effect can be adjusted. At the same time, the iridescence effect of the polarizer can be eliminated.
[0054] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An anti-glare screen, characterized in that, From top to bottom, they include: The frontal structure is either a linear structure or a common diffusion or hardening structure. The PET layer is located on the back side of the front structure; An adhesive layer is applied to the back of the PET layer, and the adhesive layer is a high-viscosity UV adhesive. Microstructure layers; A polarizer, wherein the microstructure layer is located on the upper surface of the polarizer and is bonded to the back of the adhesive layer; A Fresnel structure is located on the back side of the polarizer; A reflective layer is sprayed onto the back side of the Fresnel structure.
2. The anti-glare curtain according to claim 1, characterized in that: The adhesive layer contains PMMA or PBMA microspheres dispersed in the adhesive, and the microspheres have a particle size of 3-5 micrometers.
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 pitch1 and pitch2 structures.
4. The anti-glare curtain according to claim 3, characterized in that: The pitch1 structure has a pitch of 300-400 and a height of 40-50 μm, with the peak penetrating 5-8 μm into the adhesive layer, serving as the bonding structure with the adhesive layer.
5. The anti-glare curtain according to claim 3, characterized in that: The pitch2 structure has 40-50 pitches, a height of 20-40 μm, and is a continuous arc shape with an arc diameter of 20 μm, thus forming a honeycomb structure.
6. The anti-glare curtain according to claim 1, characterized in that: The adhesive used for bonding does not contain microbeads.
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 μm, and an radius of 20°. The peak of the columnar microstructure penetrates 2-3 μm into the adhesive layer.
8. A method for preparing an anti-glare screen, wherein the anti-glare screen according to claim 5 is characterized in that, Includes the following steps: Step 1: Coat the upper surface of the polarizer with a layer of hemispherical honeycomb microstructure. The hemispherical honeycomb structure has a large pitch1 structure in the middle as a support and is in contact with the adhesive layer. The adjacent pitches of this structure are 300-400um and the height is 40-50um. Small pitch2 structures are distributed in the middle of the hemispherical honeycomb structure. Step 2: The PET layer is bonded to the hemispherical honeycomb microstructure using a special high-viscosity UV bonding adhesive layer, and the bonding adhesive layer contains PMMA or PBMA microspheres with a particle size of 3-5 micrometers, and the peak of the pitch1 structure penetrates to a depth of 5-8 μm in the bonding adhesive layer. Step 3: Coat the surface of the PET layer with either a linear structure or a common diffusion or hardening structure as the front structure; Step 4: The Fresnel structure and reflective layer are fabricated directly on the back of the polarizer.
9. A method for preparing an anti-glare screen, wherein the anti-glare screen according to claim 7 is characterized in that, Includes the following steps: Step 1: Coat the upper surface of the polarizer with a columnar microstructure with a height of 10-30 μm and a structural pitch of 38-100 μm. Step 2: Use a sandblasting machine to atomize the surface of the structure. The sandblasting machine sprays out fine glass beads, which continuously and evenly impact the surface of the micro-concave structure, forming irregular pits on the concave arc surface of the micro-structure. Step 2: The PET layer is bonded to the columnar microstructure using a special high-viscosity UV bonding adhesive layer, and the bonding adhesive layer does not contain microbeads, with the apex of the columnar microstructure penetrating the bonding adhesive layer to a depth of 2-3 μm. Step 3: Coat the surface of the PET layer with either a linear structure or a common diffusion or hardening structure as the front structure; Step 4: The Fresnel structure and reflective layer are fabricated directly on the back of the polarizer.