Metal screen
By designing the raised curved microstructure and specific optical coating on the metal screen, the problem of the existing screen not meeting the polarization contrast when the 3D movie is displayed is solved, and higher brightness gain and polarization contrast are achieved, the exit angle is expanded, and the viewing effect and theater utilization are improved.
Patent Information
- Application Number
- CN202323655977.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-31
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2033-12-31
AI Technical Summary
The existing metal screen does not meet the polarization contrast when the 3D movie is displayed, resulting in too dark imaging and reduced clarity, which cannot meet the minimum 3D movie screening requirements. At the same time, the screen is too bright during the 2D movie screening, resulting in visual fatigue of the audience.
By designing evenly arranged convex curved microstructures on the screen base and combining with specific optical coatings, the brightness gain and polarization contrast of the screen are enhanced, while expanding the exit angle and improving the field of view.
It can meet the screening requirements of 2D and 3D movies on the same screen, improve the viewing effect and theater utilization rate, reduce the cost of screen production, and extend the service life.
Smart Images
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Abstract
Description
Technical Field
[0001] The utility model relates to a screen, in particular to a metal screen. Background Art
[0002] The metal screen is made by coating a layer of silver metal coating that can reflect various colors of light on the screen base. The light flow irradiated on the screen surface is reflected and redistributed, so that the light incident on the screen is concentrated and reflected within a certain angle in a certain direction, so that the brightness of the audience at this angle is higher, and a better viewing experience is obtained. At the same time, because the polarized light reflected radially by the metal screen has the same polarization axis direction as the incident polarized light, the current mainstream 3D movie projection technology - polarization projection method is based on this feature of the metal screen. Dual-lens equipment is used during shooting and projection to simulate the observation angle of the human eye, and two slightly different left and right films are shot. Then they are projected on the same metal screen, emitting two beams of polarized light with different polarization directions. One beam of polarized light passes through the left and right lenses of polarized glasses, while the other beam of polarized light is filtered out. The polarized light is input into the brain through the left and right eyes respectively, giving people an immersive three-dimensional sense.
[0003] It is precisely because part of the reflected light will be filtered out by the polarized lens that the brightness loss of the light incident on the screen during 3D movie projection is much higher than that of the light incident on the screen during 2D movie projection. With the existing 3D projection technology, the brightness of the light passing through 3D glasses can only reach one-fourth of that of traditional 2D movies. In the same theater, if you want the same screen to meet the projection standards for 2D and 3D movies, the screen brightness gain needs to be above 2.4, and at this brightness gain setting, the polarization contrast of the screen needs to be at least 150:1. When the brightness gain is 2.4, although a better viewing effect can be obtained when 2D movies are projected, the existing metal screens, when the brightness gain is 2.4, most of the polarization contrast produced does not meet the standard, resulting in the image appearing too dark, the clarity is reduced, and the color reproduction is poor when 3D movies are projected, which cannot meet the minimum projection requirements of 3D movies. In order to meet the polarization contrast requirements of 3D movie screenings, the existing technology for 3D movie screenings is to achieve the screening requirements of 3D movie viewing by synchronously improving the brightness of the light emitted by the 3D projector and using a screen with higher brightness gain and polarization contrast. However, the cost of the screen and projector is relatively high. Although the brightness of the projector can be lowered when showing 2D movies, due to the high brightness gain and polarization contrast of the screen itself, when the same metal screen is still used to show 2D movies, the screen image will still be too bright, which will damage the audience's eyesight and cause visual fatigue to the audience. Therefore, in order to allow the audience to have a good viewing experience, most theaters have to set up 2D theaters and 3D theaters separately.
[0004] At the same time, due to the characteristics that the brightness gain and polarization contrast of the metal screen are inversely proportional to the emission angle, the emission angle of the existing metal screen usually does not exceed 50°, and the viewing angle of the audience in front of the screen is small. At present, the theater can only accommodate the audience in the narrow range in front of the screen. The reduced utilization rate of the theater due to the inability to share the screen, and the limitation on the number of audiences that can be accommodated in a single theater due to the limited emission angle of the screen, lead to the fact that the venue and equipment resources of the theater are often not fully utilized. Utility Model Content
[0005] The utility model provides a metal screen, which combines a unique optical coating with a unique screen base design, while improving the polarization contrast and brightness gain of the screen, so that the screen can still obtain a larger emission angle, thereby expanding the field of view in front of the screen. The metal screen can achieve better viewing effects and a larger emission angle than traditional metal screens, whether it is showing 3D movies or 2D movies, and increases the effective viewing area of the theater. When the brightness gain of the screen is properly set, the same screen can be used in the same theater to show 2D movies and 3D movies, thereby improving the utilization rate of the theater.
[0006] To achieve the above-mentioned purpose, the utility model provides a metal screen, comprising a screen base and an optical coating, wherein the screen base comprises microstructures uniformly arranged on its upper surface, the microstructures are convex curved surfaces, the height H of the microstructures is 20-350 μm, the maximum diameter D of the microstructures is 20-2000 μm, the optical coating covers the screen base, and the thickness of the optical coating is 1.5-35.0 μm.
[0007] As a preferred structure of the utility model, further, the microstructure is a spherical cap microstructure, the spherical radius R corresponding to the spherical cap microstructure is 10-1000 μm, the spherical cap microstructure height H is 20-50 μm, and is less than or equal to the spherical radius R.
[0008] As a preferred structure of the utility model, further, the spherical crown-shaped microstructures are closely arranged in rows.
[0009] As a preferred structure of the utility model, further, the provided metal screen also includes sound-transmitting holes penetrating the optical coating and the screen base, the aperture size of the sound-transmitting holes is 100μm-1200μm, and the sound-transmitting holes are evenly distributed.
[0010] As a preferred embodiment of the utility model, further, in any of the above-mentioned metal screens, the optical coating components include the following mass content percentages: 50.0%-65.0% of polyurethane resin, 25.0%-38.0% of aluminum, 1.0%-6.0% of 1-hydroxycyclohexyl phenyl ketone, 1.0%-5.0% of silica, 1.0%-6.0% of cellulose acetate butyrate, 0.1%-2.0% of N-acryloylmorpholine, and 0.1%-1.0% of cyclohexanone.
[0011] As a preferred embodiment of the present invention, further, the optical coating component includes the following mass content percentages: 62.5%-63.5% of polyurethane resin, 28.0%-29.0% of aluminum, 2.0%-3.0% of 1-hydroxycyclohexyl phenyl ketone, 2.0%-3.0% of silica, 2.0%-3.0% of cellulose acetate butyrate, 0.5%-1.0% of N-acryloylmorpholine, and 0.1%-0.3% of cyclohexanone.
[0012] As a preferred embodiment of the present invention, further, the aluminum in the optical coating component is in the form of flaky aluminum sheets, the thickness of the aluminum sheets is 0.3-1.5 μm, and the maximum diameter is 0.5-5 μm.
[0013] As a preferred embodiment of the present invention, the optical coating is covered on the curtain base by a roll coating process, and the thickness of the optical coating is 1.5-5 μm.
[0014] As a preferred embodiment of the present invention, the optical coating can also be covered on the curtain base by a spraying process, and the thickness of the optical coating is 15-35 μm.
[0015] As a preferred structure of the utility model, further, the optical coating is covered with a transparent anti-oxidation layer.
[0016] As a preferred structure of the utility model, further, the anti-oxidation layer is covered with a protective layer.
[0017] Different from the prior art, the above technical solution has the following beneficial effects:
[0018] (1) When selecting the appropriate brightness gain, the projection requirements of 2D movies can be met while the requirements of 3D movies for brightness gain, polarization contrast and other indicators can be met. On the same screen, both 2D movies and 3D movies can be projected. Moreover, whether it is a 2D movie or a 3D movie, the imaging can obtain good brightness and appropriate gain, and the projected image has high clarity and good color reproduction, so that the audience can obtain a good viewing effect.
[0019] (2) On the premise of achieving the same projection quality, the projection angle of the screen is greatly improved compared to the traditional metal screen, the field of view of the projection venue is improved, and the same theater can accommodate more viewers.
[0020] (3) Compared with traditional metal screens, it has lower production costs, longer service life and better quality. Especially in the field of 3D movie projection, the same brightness gain can achieve greater polarization contrast and emission angle. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 This is a schematic diagram of a traditional metal screen;
[0022] Figure 2 It is a front view of the microstructured metal screen described in Example 1;
[0023] Figure 3 It is a front view AA cross-sectional view of the microstructure metal screen described in Example 1;
[0024] Figure 4 It is a front view BB cross-sectional view of the microstructure metal screen described in Example 1;
[0025] Figure 5 It is a front view of the spherical cap microstructure metal screen described in Example 1;
[0026] Figure 6 It is a front view and CC cross-sectional view of the spherical cap microstructure metal screen described in Example 1;
[0027] Figure 7 It is a front view and a cross-sectional view of the spherical cap microstructure metal screen described in Example 1;
[0028] Figure 8 A front view of a metal screen with spherical crown microstructures arranged in rows and closely arranged as described in Example 2;
[0029] Fig. 9 This is an EE cross-sectional view of the metal screen with spherical crown microstructures arranged in rows and closely arranged in Example 2;
[0030] Fig.10 This is a front view of the metal screen layers described in Example 2;
[0031] Fig.11 This is the FF cross-sectional view of the layered front view of the metal screen described in Example 2.
[0032] Description of reference numerals:
[0033] 1. Curtain base; 2. Microstructure; 21. Spherical cap microstructure; 3. Optical coating; 31. Aluminum particles; 32. Aluminum sheets; 4. Anti-oxidation layer; 5. Sound-permeable holes; 6. Protective layer. DETAILED DESCRIPTION
[0034] In order to explain the technical content, structural features, achieved objectives and effects of the technical solution in detail, the following is a detailed description in conjunction with specific embodiments and accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0035] The structure of traditional metal screen is as follows Figure 1 As shown. There is no microstructure design on the upper surface of the screen base 1, and the high brightness gain of the screen is mainly achieved by the metal aluminum in the optical coating 3. In order to obtain a uniform reflection effect and a certain emission angle, the metal aluminum needs to be processed into spherical particles of a specific size, namely aluminum particles 31. When the aluminum particles 31 are covered on the screen base 1 along with the optical coating 3, due to the physical properties of the spherical particles of the aluminum particles 31 themselves, the optical coating 3 needs to reach a certain thickness to ensure that the aluminum particles 31 can be arranged as evenly and stably as possible on the surface of the optical coating 3. Due to the requirements for the processing accuracy of the aluminum particles 31 and the thickness of the optical coating 3, the cost of the metal screen is relatively high.
[0036] Embodiment 1:
[0037] The present embodiment provides a metal screen, including a screen base 1 and an optical coating 3. The screen base 1 includes microstructures 2 uniformly arranged on its upper surface, the microstructures 2 are convex curved surfaces, the height H of the microstructures 2 is 20-350 μm, the maximum diameter D of the microstructures 2 is 20-2000 μm, the optical coating 3 covers the screen base 1, and the thickness of the optical coating 3 is 1.5-35.0 μm. The uniform arrangement of the microstructures 2 can be a uniform arrangement without contact or a uniform arrangement with contact. The shape of the microstructures 2 is a convex curved surface, including a convex regular curved surface and a convex irregular curved surface.
[0038] As an optional implementation, further, the microstructure 2 is a spherical cap microstructure 21, the spherical radius R corresponding to the spherical cap microstructure 21 is 10-1000 μm, the spherical cap microstructure height H is 20-50 μm, and is less than or equal to the spherical radius R.
[0039] As an optional embodiment, further, the spherical cap microstructures 21 are closely arranged in rows, and the rows are evenly spaced, including arrangements in which the rows are in close contact with each other, arrangements in which the rows are in close contact with each other in an offset manner, and the like.
[0040] When the light source shines on the screen surface, the raised curved surface of the microstructure 2 can increase the surface area of the screen, play a role in light uniformity, and increase the reflection angle of the light. The metal screen formed by the combination of the microstructure 2 and the optical coating 3 coated on the surface of the screen base 1 can obtain a higher polarization contrast when obtaining a higher brightness gain, and at the same time improve the reflection angle of the light, have a stronger ability to resist ambient light interference, and the imaging brightness of the center and the surrounding of the screen is more uniform. In addition, when the brightness gain of the metal screen is 2.4, the brightness gain and polarization contrast of the metal screen can meet the projection requirements of 2D movies and 3D movies at the same time. The polarization contrast of the metal screen is further improved compared with the traditional metal screen, and the brightness loss through 3D glasses will be reduced, so that the audience can obtain a clearer, more three-dimensional and better viewing experience; when showing 2D movies, due to the light uniformity of the microstructure, the reflection angle of the screen is increased, the screen brightness is uniform, the brightness gain is moderate, the color reproduction is good, and the audience will not feel visual fatigue due to the screen being too bright.
[0041] At the same time, because the audio equipment is arranged on the back of the screen in the projection scene such as the cinema, the metal screen needs to be provided with sound-permeable holes 5 that meet the requirements of the national projection standards when used in the cinema.
[0042] As an optional embodiment, the metal screen further includes sound-transmitting holes 5, which penetrate the optical coating 3 and the screen base 1, and the aperture size of the sound-transmitting holes 5 is 100 μm-1200 μm, which is evenly distributed. The aperture size of the sound-transmitting holes 5 is selected within a limited range according to the overall size of the screen and the location arrangement of the viewing area of the projection site, so that the sound emitted by the audio equipment can smoothly penetrate the screen so that the audience can hear the synchronized and highly restored sound effects, and the audience in the viewing area cannot detect the existence of the sound-transmitting holes 5 with the naked eye when watching the movie, and the imaging effect of the screen will not be affected by the existence of the sound-transmitting holes 5.
[0043] As an optional implementation of this embodiment, Figure 2 In the front view of the metal screen shown, the microstructure 2 arranged on the screen base 1 is a convex curved surface formed by a part of an ellipsoid. At this time, the microstructure 2 is evenly arranged without contact, the optical coating 3 covers the screen base 1 and the microstructure 2 arranged on the surface of the screen base 1, and the sound-transmitting holes 5 pass through the screen base 1 and the optical coating 3. Figure 3 yes Figure 2 AA cross-section diagram, Figure 4 yes Figure 2 BB cross-section diagram.
[0044] As another optional implementation of this embodiment, Figure 5In the front view of the metal screen shown, the microstructure 2 arranged on the screen base 1 is a spherical cap microstructure 21. At this time, the spherical cap microstructure 21 is evenly arranged without contact, the optical coating 3 covers the screen base 1 and the spherical cap microstructure 21 arranged on the surface of the screen base 1, and the sound-transmitting hole 5 passes through the screen base 1 and the optical coating 3. Figure 6 yes Figure 5 CC cross-section diagram, Figure 7 yes Figure 5 DD cross-sectional view.
[0045] Embodiment 2
[0046] Embodiment 2 provides an optical coating 3 different from the prior art on the basis of Embodiment 1, and the components of the provided optical coating 3 include the following mass contents in percentage: 50.0%-65.0% of polyurethane resin, 25.0%-38.0% of aluminum, 1.0%-6.0% of 1-hydroxycyclohexyl phenyl ketone, 1.0%-5.0% of silica, 1.0%-6.0% of cellulose acetate butyrate, 0.1%-2.0% of N-acryloylmorpholine, and 0.1%-1.0% of cyclohexanone.
[0047] When the brightness gain of the screen is 2.4, the maximum polarization contrast ratio of the existing screen using traditional optical coating can only reach 250:1, and the emission angle does not exceed 50°. After using the optical coating 3 of this embodiment on the basis of the first embodiment, the polarization contrast ratio of the screen can reach at least 800:1 under the same brightness gain, and the maximum emission angle can reach 155°. Compared with the screen using traditional optical coating, a higher polarization contrast ratio and a larger emission angle can be obtained, and the image quality during 3D projection is improved, so that both 2D movies and 3D movies can be projected on the same screen.
[0048] As an optional implementation of the optical coating of this embodiment, the components of optical coating 3 include the following mass percentages: 62.5%-63.5% polyurethane resin, 28.0%-29.0% aluminum, 2.0%-3.0% 1-hydroxycyclohexyl phenyl ketone, 2.0%-3.0% silica, 2.0%-3.0% cellulose acetate butyrate, 0.5%-1.0% N-acryloylmorpholine, and 0.1%-0.3% cyclohexanone.
[0049] In this embodiment, when the above optional implementation is adopted, when the brightness gain of the screen is 2.4, the polarization contrast ratio can reach at least 1400:1, and the maximum emission angle can still reach 155°.
[0050] As another optional implementation of this embodiment, further, the aluminum in the optical coating 3 component is a sheet-shaped aluminum sheet 32, and the thickness of the aluminum sheet 32 is 0.3-1.5μm, and the maximum diameter is 0.5-5μm. The aluminum sheet 32 does not need to be processed into a regular shape like the aluminum particles 31, and the processing accuracy requirement is lower than that of the aluminum particles 31. In addition, due to the sheet-shaped form of the aluminum sheet 32, the thickness requirement for the optical coating 3 is lower. The microstructure 2 on the upper surface of the screen base 1 has a convex curved surface, which can replace the physical properties of the aluminum particles 31 in the original prior art and combine with the aluminum sheet 32 to exert the original optical properties of the aluminum particles 31. Since the microstructure 2 on the screen base 1 is evenly arranged, the uniform light effect, brightness gain and polarization contrast are improved compared with the prior art, and the cost of the screen is reduced by more than 20%-30%. Due to the adhesion of the aluminum sheet 32, it is not easy to peel off from the optical coating 3, and the aluminum particles 31 are spherical particles and are more likely to peel off from the optical coating 3. Therefore, when the aluminum in the component is the aluminum sheet 32, the service life of the metal screen can also be improved. Figure 8 As shown, a front view of a metal screen with spherical cap microstructures 21 arranged in a row is shown, an optical coating 3 covers the screen base 1 and the spherical cap microstructures 21 arranged on the surface of the screen base 1, a portion of aluminum sheets 32 in the optical coating 3 is attached to the surface of the optical coating 3, and sound-transmitting holes 5 penetrate through the screen base 1 and the optical coating 3. Fig. 9 for Figure 8 EE cross-section diagram.
[0051] When the optical coating 3 is coated on the surface of the screen base 1 by different processing techniques, in order to achieve the same technical effect, the thickness requirements of the optical coating 3 are different. As an optional embodiment, when the optical coating 3 is coated on the screen base 1 by a roll coating process, the thickness of the optical coating 3 is 1.5-5 μm. As an optional embodiment, when the optical coating 3 is coated on the screen base by a spray coating process, the thickness of the optical coating 3 is 15-35 μm.
[0052] In order to solve the problem that metal aluminum is easily oxidized, and at the same time further improve the service life of the screen and ensure the stability of imaging quality, as an optional implementation, further, an anti-oxidation layer 4 can be covered on the optical coating 3, and the anti-oxidation layer 4 is transparent.
[0053] As an optional implementation, the anti-oxidation layer 4 may also be covered with a protective layer 6. For the convenience of transportation, the screen is generally transported in a roll, and the screen surface needs to be rolled inward. The anti-oxidation layer 4 will contact the lower surface of the screen base 1, which will cause friction during transportation and cause wear on the screen surface. After the protective layer 6 is covered on the anti-oxidation layer 4, the surface of the screen during the roll-up transportation can be protected. After the screen is installed, the protective layer 5 can be removed and the screen can be used normally. Fig.10 The layered front view of the metal screen of the optional embodiment shown in the figure has a bottom layer which is a screen base 1, the upper surface of the screen base 1 includes microstructures 2 evenly distributed, an optical coating 3 covers the screen base 1, an aluminum sheet 32 in the optical coating 3 is partially attached to the upper surface of the optical coating 3, a transparent anti-oxidation layer 4 covers the optical coating 3, sound-transmitting holes 5 penetrate the screen base 1, the optical coating 3, and the anti-oxidation layer 4 in sequence, and the anti-oxidation layer 4 is covered with a protective layer 5. Fig.11 for Fig.10 FF cross-section diagram.
Claims
1. A metal screen, comprising a screen base and an optical coating, characterized in that: The curtain base includes microstructures uniformly arranged on its upper surface, the microstructures are convex curved surfaces, the height H of the microstructures is 20-350 μm, the maximum diameter D of the microstructures is 20-2000 μm, the optical coating covers the curtain base, and the thickness of the optical coating is 1.5-35.0 μm.
2. A metal screen according to claim 1, characterized in that: The microstructure is a spherical cap microstructure, the spherical radius R corresponding to the spherical cap microstructure is 10-1000 μm, and the height H of the spherical cap microstructure is 20-50 μm, and is less than or equal to the spherical radius R.
3. A metal screen according to claim 2, characterized in that: The spherical crown-shaped microstructures are closely arranged in rows.
4. A metal screen according to claim 3, characterized in that: It also includes sound-transmitting holes penetrating the optical coating and the curtain base, the aperture size of the sound-transmitting holes is 100 μm-1200 μm, and the sound-transmitting holes are evenly distributed.
5. A metal screen according to any one of claims 1 to 4, characterized in that: Aluminum flakes are attached to the surface of the optical coating. The aluminum flakes have a thickness of 0.3-1.5 μm and a maximum diameter of 0.5-5 μm.
6. A metal screen according to claim 5, characterized in that: The optical coating is covered on the curtain base by a roll coating process, and the thickness of the optical coating is 1.5-5 μm.
7. The metal screen according to claim 5, characterized in that: The optical coating is covered on the curtain base by a spraying process, and the thickness of the optical coating is 15-35 μm.
8. The metal screen according to claim 5, characterized in that: The optical coating is covered with a transparent anti-oxidation layer.
9. A metal screen according to claim 8, characterized in that: The anti-oxidation layer is covered with a protective layer.