Reflection type screen base with microstructure

Abstract

The utility model provides a reflective screen base with microstructures, which comprises a screen base body, spherical crown microstructures are arranged on the upper surface of the screen base body, namely a base surface, and the height H of the spherical crown microstructures is 20-100 microns. The surface area of the base surface of the screen base can be increased by the convex curved surfaces of the spherical crown microstructures arranged on the base surface, when a light source irradiates the surface of the screen, a light uniformizing effect is achieved, the overall brightness of light reflected by the screen is increased, meanwhile, the emergent angle of the light is increased, and the field angle of the screen is increased. The screen base is applied to screen manufacturing, compared with a screen using a traditional screen base, the problem of non-uniformity of picture brightness can be eliminated, the reflection angle of the screen can be increased, the field angle of the screen is increased, and meanwhile images with uniform brightness and high image definition are obtained.

Description

Technical Field

[0001] The utility model relates to a reflective screen base, in particular to a reflective screen base with a microstructure. Background Art

[0002] The screen is a screen for the audience to watch the projected image. It is an indispensable accessory for slide projectors, projectors, movie projectors, etc., and is an important part of the projection system. According to the purpose, the screen can be divided into reflective screen and transmissive screen. The reflective screen scatters the light irradiated by the projector onto the screen, so that the audience within a certain range in front of the screen can watch the projected image. Whether the screen brightness is appropriate and evenly distributed is one of the important indicators that determine the projection quality, and the size of the scattering angle determines the viewing angle of the audience that can be accommodated in front of the screen.

[0003] With the improvement of economic level, moviegoers have higher and higher requirements for projection quality, especially in cinemas, exhibition halls and other places, the demand for projection screens and projection quality requirements are rising sharply. The screen size in these occasions ranges from a few meters to more than ten meters, or even larger. In order to ensure the imaging quality, the existing reflective screens all need to be coated or plated with one or more coatings on the surface of the screen base to form a reflective surface for imaging. At this time, although the brightness of the screen is improved and the imaging quality is improved, due to the single optical properties of the reflective surface formed by the coating, it is difficult for the screen to obtain a larger reflection angle, and the audience in front of the screen can only obtain a smaller viewing angle.

[0004] If the light irradiating the screen surface wants to obtain a larger effective scattering angle, it is difficult to obtain a good reflection coefficient. If the audience wants to watch images with higher brightness and image clarity, the effective scattering angle of the screen will be reduced, and the audience's viewing angle will become smaller. The screen's excellent brightness coefficient and a larger effective scattering angle are usually not achieved at the same time, that is, the larger the screen's gain value, the smaller the viewing angle, and the smaller the screen's gain value, the larger the viewing angle.

[0005] In addition, in some simpler projection scenarios, due to limitations in cost and venue, the screens used mainly scatter images through the light characteristics of the screen base itself. Although within a larger angle range, the light flow when the audience views the image will not change with the viewer's angle, the screen brightness is poor and the image quality is not high.

[0006] In response to the above technical problems, the existing technology has improved the screen base and combined with the reflective coating of the screen to improve the reflection efficiency of the screen to the light source, reduce the influence of ambient light on the imaging effect of the reflected light source, make the projection image contrast higher, and improve the projection effect. However, the screen base used in the existing technology is mostly combined with the reflective coating through strip or columnar protrusions. While improving the imaging effect of the screen, the scattering angle of the light does not increase, and the viewing angle of the audience cannot be improved. For example, the screen substrate layer described in the prior art "A Movie Screen" (Authorization Announcement No.: CN212989870U) adopts a concave-convex structure with a height difference, the protrusion is columnar, and it needs to be combined with a metal reflective layer consistent with the surface shape of the concave-convex structure. It can only solve the technical problem of efficiently reflecting the projection light to the viewer side, reducing the influence of ambient light, making the projection image contrast higher, and improving the projection effect, but it cannot improve the viewing angle of the audience in front of the screen. Utility Model Content

[0007] The utility model provides a reflective screen base with a microstructure, which enables the screen to have both good imaging quality and a larger scattering angle during projection through a unique screen base surface microstructure.

[0008] To achieve the above object, the utility model provides a reflective screen base with a microstructure, including a screen base body, characterized in that a spherical cap microstructure is arranged on the upper surface, i.e., the base surface, of the screen base body, and the height H of the spherical cap microstructure is 20-100 μm.

[0009] As a preferred structure of the utility model, the spherical radius R corresponding to the spherical cap microstructure is 10-1000 μm, and the height H of the spherical cap microstructure is less than or equal to the spherical radius R.

[0010] As a preferred structure of the utility model, the spherical cap microstructures are arranged in an array to form a spherical cap microstructure array.

[0011] As a preferred structure of the utility model, the spherical cap microstructures located in the same row in the spherical cap microstructure array are in close contact.

[0012] As a preferred structure of the utility model, the spherical cap microstructures located in the same row in the spherical cap microstructure array are staggered with the spherical cap microstructures located in a different adjacent row.

[0013] As a preferred structure of the utility model, the distance between the spherical cap microstructures located in the same row and the spherical cap microstructures located in the adjacent rows in the spherical cap microstructure array is 0.

[0014] As a preferred embodiment of the above structure of the utility model, the reflective screen base with a microstructure further includes evenly distributed through-going sound-transmitting holes, and the aperture size of the sound-transmitting holes is 100-1200 μm.

[0015] As a preferred embodiment of the above structure of the utility model, the spherical cap microstructure is integrally formed with the base surface.

[0016] As a preferred embodiment of the above structure of the utility model, the spherical cap microstructure is directly formed on the base surface by mold pressing or rolling.

[0017] As a preferred embodiment of the above structure of the utility model, the material of the reflective screen base with microstructure is PVC or PET.

[0018] Different from the prior art, the above technical solution has the following beneficial effects:

[0019] (1) This screen base is used in screen production. The screen made of a reflective coating on the screen base can not only eliminate the problem of uneven brightness of the picture, but also increase the reflection angle of the screen, thereby increasing the audience's field of view of the screen. While expanding the viewing area in front of the screen, it provides viewers in the viewing area in front of the screen with images with uniform brightness and high image clarity.

[0020] (2) For projection scenes with limited cost and space, the optical properties of the screen base itself can be used to directly form an image. The light source is irradiated on the screen base, which can obtain a larger brightness coefficient compared to the traditional screen base. While retaining the advantage of the larger scattering angle of direct imaging of the screen base, the brightness coefficient of the imaging is improved, thereby improving viewing comfort and retaining the advantage of low screen cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an axonometric view of the first embodiment;

[0022] Figure 2 A diagram showing the relationship between the spherical cap microstructure and the corresponding spherical radius described in the utility model;

[0023] Figure 3 It is a front view of the uniformly arranged spherical cap microstructures described in Example 2;

[0024] Figure 4 for Figure 3 AA section diagram of;

[0025] Figure 5 It is an axonometric view of the closely staggered arrangement of the spherical cap microstructures described in Example 2;

[0026] Figure 6 It is a front view of the closely staggered arrangement of the spherical cap microstructures described in Example 2;

[0027] Figure 7 for Figure 6 BB cross-section diagram;

[0028] Figure 8 Schematic diagram of a light source irradiating a reflective screen base having a microstructure according to a specific embodiment

[0029] Fig. 9 This is a simulation diagram of the reflection effect of light source on the reflective screen base with microstructure.

[0030] Description of reference numerals:

[0031] 1. Curtain basic body; 2. Base surface; 3. Sound-permeable holes; 4. Spherical cap microstructure. DETAILED DESCRIPTION

[0032] In order to explain the technical content, structural features, achieved purposes 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 herein are only used to explain the utility model, illustrate the technical concept and features of the utility model, and are not used to limit the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

[0033] Embodiment 1:

[0034] See also Figure 1 As shown in the figure, this embodiment provides a reflective screen base with a microstructure, including: a screen base body 1, and spherical cap microstructures 4 are arranged on the upper surface of the screen base body 1, that is, the base surface 2, and the height H of the spherical cap microstructures 4 is 20-100μm. These spherical cap microstructures 4 are randomly distributed on the base surface 2.

[0035] In the above embodiment, the convex curved surface of the spherical cap microstructure 4 arranged on the base surface 2 can increase the surface area of ​​the upper surface of the screen base body 1, that is, the base surface 2. When the light source irradiates the screen surface or the base surface 2, the spherical cap microstructure 4 can play a role in balancing the light, thereby increasing the overall brightness of the light reflected by the screen or the base surface 2. Therefore, only by using this optical property of the reflective screen base with microstructure provided by the utility model directly for imaging, when the projection light source directly irradiates the base surface 2 or irradiates the screen with a general screen coating coated with a non-metallic coating on the base surface 2, the brightness of the projected image will be higher than that of the screen base or screen without the spherical cap microstructure 4. In the application of high-gain or high-brightness screens represented by metal screens, the high gain or high brightness of such screens are obtained at the expense of the screen's exit angle. When this embodiment is applied to high-gain or high-brightness screens such as metal screens, the arc surface unique to the spherical cap microstructure 4 arranged on the base surface 2 can increase the angle of light emission after the light source irradiates the screen, and the screen can obtain a larger field of view than when this embodiment is not used. In reality, some screens with relatively high projection quality requirements usually do not exceed 50° for viewing on the screen due to the requirements of screen brightness and polarization contrast. By using this embodiment, the viewing angle of the audience can be increased to more than 50°.

[0036] When the spherical radius R corresponding to the spherical cap microstructure 4 is 10-1000 μm and the height H of the spherical cap microstructure 4 is less than or equal to the spherical radius R, the effect is better. The corresponding relationship between the spherical radius R corresponding to the spherical cap microstructure 4 and the height H of the spherical cap microstructure 4 is as follows: Figure 2 shown.

[0037] Embodiment 2:

[0038] This embodiment shows an implementation method in which the spherical cap microstructures 4 are arranged in an array on the base surface 2. This array arrangement method only requires the spherical cap microstructures 4 to be arranged in rows, and the spacing between the spherical cap microstructures 4 in the same row is not limited, and there may be spacing or no spacing, and there is no limitation on the spacing between rows, and there may be spacing or no spacing.

[0039] like Figure 3 As shown, an array arrangement of spherical cap microstructures 4 is uniformly distributed on the base surface 2. The spherical cap microstructures 4 are uniformly arranged on the base surface 2, and the spacing between spherical cap microstructures 4 in the same row is equal, and the spacing between rows is also equal. Figure 4 yes Figure 3 The AA cross-sectional diagram shows the corresponding relationship between the spherical cap microstructure 4, the curtain basic body 1 and the base surface 2 displayed by the AA cross-section when the spherical cap microstructure array is evenly arranged.

[0040] Alternatively, the spherical cap microstructures 4 in the same row of the spherical cap microstructure array are in close contact to form a spherical cap microstructure array. At this time, there is no spacing between the spherical cap microstructures 4 in the same row, and the spacing between rows is not limited, and there may be spacing or no spacing.

[0041] Alternatively, the spherical cap microstructures 4 in the same row in the spherical cap microstructure array are staggered with the spherical cap microstructures 4 in different adjacent rows. In this case, there is no spacing between the spherical cap microstructures 4 in the same row. It is sufficient that there is a staggered spacing between the rows to form a staggered spacing. There is no limitation on the spacing between the rows. There may be spacing or there may not be spacing.

[0042] Or, if Figure 5 As shown, the spherical cap microstructures 4 in the same row of the spherical cap microstructure array are in close contact, and are staggered with the spherical cap microstructures 4 in adjacent rows, and the spacing is 0, and the spherical cap microstructures 4 are closely staggered. Figure 6 is the front view of the arrangement, Figure 7 for Figure 6 BB cross-sectional view, Figure 5-Figure 7 Shown together is the positional relationship among the curtain base body 1, the base surface 2, and the spherical cap microstructures 4 when the spherical cap microstructures 4 are closely staggered.

[0043] like Figure 8 As shown, it is a schematic diagram showing a light source irradiating a reflective screen base with a microstructure in a projection scene, showing the direction of the light path. Fig. 9 Shown is Figure 8 After the light source irradiates the reflective screen base with microstructures using the embodiment of the spherical cap microstructure 4 closely staggered arrangement, the direction of the light after the light source is reflected. It can be seen that the reflected light is concentrated and has uniform density. With this embodiment, the maximum angle of light emission can be greater than 150°.

[0044] For the above-mentioned implementation method of closely staggered arrangement of the spherical cap microstructures 4, different height H intervals and corresponding spherical radii R of the spherical cap microstructures 4 within the protection range were selected. Under the assumption that the brightness gain was 1.0, the reflection effect of the light source was simulated. Through simulation calculation, the corresponding emission angle range data was obtained, and the specific situation is as follows:

[0045] Spherical cap microstructure height H The spherical radius R corresponding to the spherical cap microstructure Maximum emission angle 20-50μm 50μm 175° 20-100μm 100μm 175° 40-100μm 500μm 175°

[0046] Under the same conditions, the maximum emission angle of the screen base without the above-mentioned closely staggered spherical cap microstructures 4 is only 150°. It can be seen that whether the image is directly formed by the reflective screen base with microstructures or a reflective coating with optical properties is coated on the reflective screen base with microstructures, the brightness of the image, the color reproduction and the viewing angle of the audience are significantly improved compared with the prior art, which can bring a better viewing experience to the audience.

[0047] In projection scenes such as theaters, in order to give the audience a better viewing experience, in addition to high-quality image effects, excellent sound effects synchronized with the images are also very important. In order to obtain better sound effects, in projection scenes such as theaters, audio equipment is arranged on the back of the screen. Based on the above embodiment, the protected subject is a reflective screen base with a microstructure, which also includes sound holes. The sound holes are evenly distributed, and the aperture size of the sound holes is 100-1200μm, and the density setting of the sound holes 3 meets the requirements of national projection standards. The sound holes 3 penetrate the reflective screen base with a microstructure provided by the utility model, such as a spherical cap microstructure 4 is arranged on the base surface 2 at the corresponding position of the sound holes 3, and the sound holes 3 sequentially penetrate the spherical cap microstructure 4, the base surface 2, and the screen base body 1. The size of the aperture of the sound-permeable hole 3 is selected within a limited range according to the overall size of the screen, 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 seats cannot detect the existence of the sound-permeable hole 3 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-permeable hole 3.

[0048] In the above embodiment, the spherical cap microstructure 4 and the base surface 2 can be integrally formed.

[0049] In the above embodiment, the spherical cap microstructure 4 can be directly formed on the base surface 2 by mold pressing or rolling.

[0050] In the above implementation manner, the material of the reflective screen base with a microstructure provided by the utility model can be PVC or PET.

Claims

1. A reflective screen substrate with a microstructure, comprising a screen substrate body, characterized in that: The upper surface of the curtain basic body, that is, the base surface, is arranged with spherical cap microstructures, and the height H of the spherical cap microstructures is 20-100 μm.

2. The reflective screen substrate with microstructure according to claim 1, characterized in that: The spherical radius R corresponding to the spherical cap microstructure is 10-1000 μm, and the height H of the spherical cap microstructure is less than or equal to the spherical radius R.

3. The reflective screen substrate with microstructure according to claim 2, characterized in that: The spherical cap microstructures are arranged in an array to form a spherical cap microstructure array.

4. The reflective screen substrate with microstructure according to claim 3, characterized in that: The spherical cap microstructures in the same row in the spherical cap microstructure array are in close contact.

5. The reflective screen substrate with microstructure according to claim 4, characterized in that: In the spherical cap microstructure array, the spherical cap microstructures in the same row are arranged in a staggered manner with the spherical cap microstructures in adjacent rows.

6. The reflective screen substrate with microstructure according to claim 5, characterized in that: In the spherical cap microstructure array, the distance between the spherical cap microstructures in the same row and the spherical cap microstructures in the adjacent rows is 0.

7. A reflective screen substrate with a microstructure according to any one of claims 1 to 6, characterized in that: It also includes evenly distributed through-going sound-transmitting holes, each of which has a pore size of 100-1200 μm.

8. The reflective screen substrate with microstructure according to claim 7, characterized in that: The spherical cap microstructure is integrally formed with the base surface.

9. The reflective screen substrate with microstructure according to claim 8, characterized in that: The spherical cap microstructure is directly formed on the base surface by mold pressing or rolling.

10. A reflective screen substrate with a microstructure according to any one of claims 1 to 6, characterized in that: The material is PVC or PET.

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