Semi-cylindrical micro-mirror micro-optical projection curtain
By setting a semi-cylindrical micromirror array on the back of the projection screen substrate layer and combining it with reflection, diffusion and color toning layers, the problem of low gain and small viewing angle of existing projection screens is solved, and a projection effect with high brightness and large viewing angle is achieved.
Patent Information
- Application Number
- CN202520660669.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-09
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-04-09
AI Technical Summary
Existing projection screens suffer from the problem of high gain resulting in a narrow viewing angle, and low gain leading to insufficient brightness when the viewing angle is wide.
A semi-cylindrical micromirror micro-optical projection screen is adopted, with multiple concave micromirror arrays set on the back of the substrate layer. Each micromirror gradually increases in angle, and combined with a reflective layer, a diffusion layer and a color tone layer, the light reflection and diffusion effects are optimized.
The reflection gain and brightness of the projection screen were improved, while the horizontal viewing angle was expanded, resulting in a projection screen with high brightness, high gain, and ultra-wide viewing angle.
Smart Images
Figure CN223897761U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of projection display technology, specifically relating to a semi-cylindrical micromirror micro-optical projection screen. Background Technology
[0002] A projection display system requires a projector and a projection screen. The projection screen's function is to image the projected light and redistribute the projected light intensity. This redistribution of light intensity relies on various microstructures on the screen to diffuse, converge, or control the direction of light transmission as needed to meet the requirements of different viewing fields.
[0003] However, existing projection screens suffer from problems such as high gain but small viewing angle, and large viewing angle but low gain. Utility Model Content
[0004] To address the shortcomings of existing technologies, this invention provides a semi-cylindrical micromirror micro-optical projection screen that can solve the aforementioned problems.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a semi-cylindrical micromirror micro-optical projection screen, comprising a substrate layer and a micro-optical structure layer;
[0006] The micro-optical structure layer is disposed on the back side of the substrate layer. The micro-optical structure layer includes multiple concave micromirrors. Each concave micromirror has a semi-cylindrical structure, and the curved surface of the concave micromirror faces away from the substrate layer. The multiple concave micromirrors are arranged in an array, with the bottom concave micromirror arranged vertically. The angle between the axis of the concave micromirror and the vertical plane gradually increases from bottom to top.
[0007] Preferably, a protective layer is also included, which is disposed on the back side of the micro-optical structure layer.
[0008] Preferably, a reflective layer is also included, which is disposed between the protective layer and the micro-optical structure layer.
[0009] Preferably, a diffusion layer is also included, which is disposed on the front side of the substrate layer.
[0010] Preferably, a color-correcting layer is also included, which is disposed between the diffusion layer and the substrate layer.
[0011] Preferably, the micro-optical structure layer is applied to the substrate layer using precision mold pressing or UV printing technology.
[0012] Preferably, the substrate layer is a PET film or a PVC film.
[0013] Preferably, the substrate layer is a high-transparency film, and the thickness of the substrate layer is 0.1-0.5 mm.
[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0015] This invention provides a semi-cylindrical micromirror micro-optical projection screen. Multiple concave micromirrors, arranged in a micromirror array on the back of a substrate layer, form a micromirror array, with each concave micromirror serving as an individual reflective surface. The longitudinally arranged concave micromirrors gradually increase in angle from bottom to top, reflecting light diffused vertically by the projection screen to the viewing area, thus improving the screen's reflection gain. The vertical placement of the semi-cylindrical concave micromirrors effectively diffuses the projected light, increasing the horizontal viewing angle. This reduces vertical light loss and increases the screen's brightness while also expanding its viewing angle. Therefore, a high-brightness, high-gain projection screen with an ultra-wide horizontal viewing angle is produced. Attached Figure Description
[0016] Figure 1 A three-dimensional structural schematic diagram of a semi-cylindrical micromirror micro-optical projection screen provided for an embodiment of this utility model;
[0017] Figure 2 A side view of the micro-optical structure layer and substrate layer of a semi-cylindrical micromirror micro-optical projection screen provided for an embodiment of this utility model;
[0018] Figure 3 A schematic diagram of the optical path side view structure of a semi-cylindrical micromirror micro-optical projection screen provided for an embodiment of this utility model;
[0019] Figure 4 A top view schematic diagram of the micro-optical structure layer and substrate layer of a semi-cylindrical micromirror micro-optical projection screen provided for an embodiment of this utility model;
[0020] Figure 5 A top-view schematic diagram of the optical path structure of a semi-cylindrical micromirror micro-optical projection screen provided for an embodiment of this utility model;
[0021] Figure 6 One of the top view structural schematic diagrams of a semi-cylindrical micromirror micro-optical projection screen provided for an embodiment of this utility model;
[0022] Figure 7 This is the second top view schematic diagram of a semi-cylindrical micromirror micro-optical projection screen provided for an embodiment of this utility model.
[0023] The attached diagram lists the components represented by each number as follows:
[0024] 1. Substrate layer;
[0025] 2. Micro-optical structure layer;
[0026] 3. Concave microscope;
[0027] 4. Protective layer;
[0028] 5. Reflective layer;
[0029] 6. Diffusion layer;
[0030] 7. Color adjustment layer;
[0031] 8. Projector. Detailed Implementation
[0032] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.
[0033] This embodiment provides a semi-cylindrical micromirror micro-optical projection screen, including a substrate layer 1 and a micro-optical structure layer 2.
[0034] The micro-optical structure layer 2 is disposed on the back side of the substrate layer 1. The micro-optical structure layer 2 includes multiple concave micromirrors 3. The concave micromirrors 3 are semi-cylindrical structures. The curved surface of the concave micromirrors 3 faces away from the substrate layer 1. The multiple concave micromirrors 3 are arranged in an array. The bottom concave micromirror 3 is vertically arranged. The angle between the axis of the concave micromirrors 3 and the vertical surface gradually increases from bottom to top.
[0035] For example, see Figure 1 The concave micromirror 3 has a semi-cylindrical structure and is disposed on the back side of the substrate layer 1, with the curved surface of the concave micromirror 3 facing away from the substrate layer 1. (See also...) Figure 2 Multiple concave micromirrors 3 are evenly arranged vertically to form a row of concave micromirrors. In this row, the lowest concave micromirror 3 is vertically positioned, and the angle between the axis of the concave micromirrors 3 and the vertical plane gradually increases from bottom to top, meaning the top of each concave micromirror 3 gradually tilts forward. (See also...) Figure 4 Multiple rows of concave micromirrors are uniformly arranged laterally to form a micromirror array, which is the micro-optical structure layer 2. Each concave micromirror 3 in the micromirror array can individually reflect projected light and ambient light.
[0036] Based on the above structure, the semi-cylindrical micromirror micro-optical projection screen provided in this embodiment has a micromirror array composed of multiple concave micromirrors 3 on the back of the substrate layer 1, with each concave micromirror 3 serving as an individual reflective surface. The longitudinally arranged concave micromirrors 3 gradually increase in angle from bottom to top, reflecting the light diffused upwards and downwards by the projection screen to the projection viewing area, such as... Figure 1 , Figure 3As shown, this effectively improves the reflection gain of the projection screen. The semi-cylindrical concave micromirror 3 is placed vertically; it can diffuse the projected light, such as... Figure 5 As shown, the horizontal viewing angle is increased. This reduces vertical light loss and increases screen brightness while also increasing the viewing angle. This results in a high-brightness, high-gain projection screen with an ultra-wide horizontal viewing angle.
[0037] Based on the above technical solution, the technical solution provided in this embodiment also includes a protective layer 4, which is disposed on the back side of the micro-optical structure layer 2.
[0038] It also includes a reflective layer 5, which is disposed between the protective layer 4 and the micro-optical structure layer 2.
[0039] It also includes a diffusion layer 6, which is disposed on the front side of the substrate layer 1.
[0040] For example, see Figure 6 From front to back, it includes a diffusion layer 6, a substrate layer 1, a micro-optical structure layer 2, a reflective layer 5, and a protective layer 4.
[0041] It also includes a color-correcting layer 7, which is disposed between the diffusion layer 6 and the substrate layer 1.
[0042] For example, see Figure 7 From front to back, it includes a diffusion layer 6, a color-correcting layer 7, a substrate layer 1, a micro-optical structure layer 2, a reflective layer 5, and a protective layer 4. The color-correcting layer 7 can also be combined with the reflective layer 5, eliminating the need for a separate color-correcting layer 7.
[0043] The substrate layer 1 is made of a material with high mechanical strength and high transparency, such as PET film, PVC film, or other high-transparency films, with a film thickness of 0.1-0.5mm. This type of material ensures that the screen has good stability, durability, and light transmittance during use.
[0044] Fabrication of the micro-optical structure layer 2: Based on the distance between the projection and the screen, the projection display size, and the placement of the projector 8, the angle and size of each concave micromirror 3 are precisely calculated. First, a micromirror array template is photolithographically formed, and then a micromirror array is formed on the substrate layer 1 using precision mold pressing or UV printing technology. This step allows for precise control of the direction of the projected light, thereby enhancing the brightness and clarity of the projected image. The semi-circular diameter of the concave micromirror 3 can be 1-80µm, the width can be 3-100µm, and the length can be 3-100µm, adjusted according to the actual application field of the semi-cylindrical micro-optical projection screen.
[0045] Fabrication of reflective layer 5: The reflective layer 5 can be fabricated using an aluminum plating process or by coating with an electroplated aluminum silver paste. This reflective layer 5 allows projected light to be reflected back to the front of the projection screen, enabling users to view the light source reflected from the projection screen.
[0046] Fabrication of protective layer 4: A protective coating is applied to the surface of aluminum-plated or imitation electroplated aluminum silver paste (reflective layer 5) as protective layer 4. Different anti-scratch resins are used for the protective coating to protect the reflective layer 5 and ensure that it remains intact during long-term use.
[0047] Preparation of color layer 7: Color resin is coated on the surface of substrate layer 1 as color layer 7. The color resin is made by mixing high transparency resin with carbon black pigment powder (or carbon black flakes) in a certain proportion, wherein the proportion of black pigment powder (or carbon black flakes) is 0.5%-30%.
[0048] Fabrication of diffusion layer 6: A diffusion layer 6 is coated on the surface of the color layer 7. The diffusion layer 6 is composed of highly transparent scratch-resistant resin and organic microspheres (the diameter of the organic microspheres is 0.005-20um). The diffusion layer 6 can uniformly disperse the light reflected by each concave micromirror 3, forming a diffuse reflection effect, so that the projected image is evenly distributed.
[0049] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0051] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.
[0052] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.
Claims
1. A semi-cylindrical micromirror micro-optical projection screen, characterized in that, Includes a substrate layer (1) and a micro-optical structure layer (2); The micro-optical structure layer (2) is disposed on the back side of the substrate layer (1). The micro-optical structure layer (2) includes a plurality of concave micromirrors (3). The concave micromirrors (3) are semi-cylindrical structures. The curved surface of the concave micromirrors (3) faces away from the substrate layer (1). The plurality of concave micromirrors (3) are arranged in an array. The concave micromirrors (3) at the bottom are arranged vertically. The angle between the axis of the concave micromirrors (3) and the vertical plane gradually increases from bottom to top.
2. The semi-cylindrical micromirror micro-optical projection screen according to claim 1, characterized in that, It also includes a protective layer (4), which is disposed on the back side of the micro-optical structure layer (2).
3. The semi-cylindrical micromirror micro-optical projection screen according to claim 2, characterized in that, It also includes a reflective layer (5), which is disposed between the protective layer (4) and the micro-optical structure layer (2).
4. The semi-cylindrical micromirror micro-optical projection screen according to claim 1, characterized in that, It also includes a diffusion layer (6) disposed on the front side of the substrate layer (1).
5. A semi-cylindrical micromirror micro-optical projection screen according to claim 4, characterized in that, It also includes a color-correcting layer (7) disposed between the diffusion layer (6) and the substrate layer (1).
6. The semi-cylindrical micromirror micro-optical projection screen according to claim 1, characterized in that, The micro-optical structure layer (2) is printed onto the substrate layer (1) using precision mold pressing or UV printing technology.
7. The semi-cylindrical micromirror micro-optical projection screen according to claim 1, characterized in that, The substrate layer (1) is a PET film or a PVC film.
8. The semi-cylindrical micromirror micro-optical projection screen according to claim 1, characterized in that, The substrate layer (1) is a high-transparency film, and the thickness of the substrate layer (1) is 0.1-0.5mm.