Projection screen and vehicle-mounted display screen
By coupling the viscoelastic material vibration dissipation unit on the screen body of the projection screen, the problem of projection screen jitter in the on-board environment is solved, and a more stable viewing effect and highly adaptable material use is achieved.
Patent Information
- Application Number
- CN202311477598.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-06
- Publication Date
- 2025-05-13
AI Technical Summary
In use environments such as on-board projection, the projection screen shakes due to vehicle vibration, which seriously affects the viewing effect.
A projection screen is designed that couples vibration dissipation units at at least one end of the screen body, and uses the damping dissipation mechanism of the viscoelastic material to convert the vibration of the screen body into thermal energy, thereby reducing vibration.
It effectively reduces the jitter of the projection screen, improves the viewing effect in the on-board environment, and allows the use of materials with good elasticity and temperature adaptability to ensure the stable performance of the projection screen under different temperature environments.
Smart Images
Figure CN119987114A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of screens, and in particular to a projection screen with anti-vibration performance and a vehicle-mounted display screen using the projection screen. Background Art
[0002] The projection screen is an indispensable device for the projection equipment to obtain high-quality projection effects. Usually, the usage environment of the projection screen is mostly fixed, so in most cases, the industry only pays attention to the display performance such as the anti-light performance of the projection screen, and will not pay more attention to the anti-vibration performance of the projection screen.
[0003] During the specific development, the applicant found that in the use environment such as in-vehicle projection, the vehicle will vibrate due to various situations while driving. After this vibration is transmitted to the in-vehicle display screen, it will cause the projection screen surface to shake, seriously affecting the viewing effect.
[0004] Therefore, the applicant is committed to providing a projection screen with good anti-vibration performance in the vehicle-mounted projection display scenario. Summary of the invention
[0005] In order to solve the above problems, the present application proposes a projection screen and a vehicle-mounted display screen.
[0006] A projection screen comprises a screen body. A vibration dissipation unit is coupled to at least one end of the screen body. The vibration dissipation unit is used to damp and dissipate the vibration of the screen body itself.
[0007] Preferably, the vibration dissipation unit is a viscoelastic damping unit.
[0008] Preferably, the viscoelastic damping unit is a coating containing a viscoelastic material, which is formed on at least one end surface of the screen body to damp and dissipate vibrations generated by the screen body.
[0009] Preferably, the viscoelastic damping unit is a sheet-like object containing viscoelastic material, which is connected to at least one end of the screen body and together with the screen body constitutes the projection screen to damp and dissipate vibration generated by the screen body.
[0010] Preferably, the viscoelastic damping unit is a clamping member comprising a viscoelastic material, which is clamped at at least one end of the screen body to damp and dissipate vibration generated by the screen body.
[0011] Preferably, the screen body includes a substrate and a reflective layer formed on the substrate, wherein the reflective layer is a coating containing a rubber component.
[0012] Preferably, the reflective layer is a silicone rubber coating.
[0013] Preferably, the organic silicone rubber coating is doped with scattering particles.
[0014] A vehicle-mounted display screen comprises the projection screen as described above.
[0015] Preferably, the projection screen is a flexible screen.
[0016] Compared with existing screens, the above-mentioned projection screen and vehicle-mounted display screen provided in the present application couple the vibration dissipation unit at at least one end of the screen body, utilize the material properties of the vibration dissipation unit itself, and reduce the vibration of the screen body by converting the vibration of the screen body into non-vibration forms of energy such as heat energy.
[0017] Furthermore, when the screen body is a flexible screen, the vibration dissipation unit is preferably a viscoelastic damping unit comprising a viscoelastic material. In this case, the elastic and viscous characteristics of the viscoelastic material can be fully utilized. On the one hand, the elastic characteristics of the viscoelastic material can be utilized to ensure that the vibration dissipation unit does not affect the flexibility of the screen body. On the other hand, the viscous characteristics of the viscoelastic material can be utilized to convert the vibration generated by the screen body into heat energy and be quickly dissipated, thereby playing a vibration reduction role.
[0018] Furthermore, based on the vibration reduction mechanism of the vibration dissipation unit that can convert vibration into heat energy, the projection screen can be allowed to use materials such as rubber that have good elasticity and adaptability to a wide temperature range as the main material of the projection screen body. On the one hand, the vibration damping and dissipation mechanism of the vibration dissipation unit greatly reduces the elastic vibration caused by highly elastic materials such as rubber themselves. On the other hand, the good elasticity of the rubber material can be used to further weaken and eliminate the vibration transmitted to the projection screen, thereby reducing and eliminating the jitter of the projection screen. On the other hand, the adaptability of the rubber material to a wide temperature range can be used to ensure that the projection screen can maintain stable performance in different temperature environments.
[0019] Furthermore, when the reflective layer is made of a material including rubber having good elasticity and adaptability to a large temperature range, by doping the scattering particles in the reflective layer, the projection light is reflected on the surface of the reflective layer and diffused at the same time, so that the reflective layer has a high reflectivity and a large scattering angle, thereby increasing the visible range of the projected image of the projection screen. At the same time, by adding scattering particles to the rubber layer, the elasticity of the rubber layer can also be improved, further avoiding the screen jitter problem caused by the good elasticity of the rubber layer. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0021] Figure 1 1 is a schematic diagram of the structure of a projection screen provided in one embodiment of the present application, which includes a screen body 10 .
[0022] Figure 2 It is a schematic diagram of the structure of a projection screen provided in another embodiment of the present application.
[0023] Figure 3 It is a schematic structural diagram of a projection screen provided in yet another embodiment of the present application.
[0024] Figure 4 yes Figure 1 An optional structural schematic diagram of the screen body 10 is shown. DETAILED DESCRIPTION
[0025] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.
[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.
[0027] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.
[0028] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.
[0029] See also Figure 1 An embodiment of the present application provides a projection screen, which includes a screen body 10 and a vibration dissipation unit 20.
[0030] In the present application, the screen body 10 serves as a projection display medium, and according to different product requirements, it can be a flexible screen formed of a flexible material, or a hard screen formed of a hard material.
[0031] Preferably, in this embodiment, the screen body 10 is a flexible screen, which serves as a supporting body of the projection screen and can be rolled up and unfolded under the action of an external force.
[0032] In this embodiment, the material of the flexible screen can be selected from flexible polymer materials such as polyvinyl alcohol (PVA), polyester (PET), polyimide (PI), polyethylene naphthalate (PEN), etc., and can also be selected from leather, fabric, etc. As long as it can serve as a support body and can be rolled up and unfolded under the action of external force, it can be applied to this embodiment as the screen body 10. Preferably, in this embodiment, the screen body 10 uses fabric material as the main material.
[0033] The vibration dissipation unit 20 is coupled to at least one end of the screen body 10 and is used to damp and dissipate the vibration of the screen body 10 itself.
[0034] In the present embodiment, the vibration dissipation unit 20 is a viscoelastic damping unit including a viscoelastic material. The viscoelastic material is a material composed of a component with energy storage capacity (elastic part) and a component with energy loss capacity (viscous part) in different proportions. When the material is subjected to alternating stress, the mechanical energy acting on the elastic component can be stored as potential energy and then returned to the outside world. The material behaves elastically, while the other part of the energy acting on the viscous component is converted into heat energy and dissipated due to the internal friction of the material. The amplitude of the vibration decays rapidly over time, thereby playing a vibration reduction role. In the present embodiment, by coupling the vibration dissipation unit 20 to at least one end of the screen body 10, the above-mentioned properties of the viscoelastic material are used to damp and dissipate the vibration generated by the screen body 10, thereby playing a role in reducing the vibration of the screen body 10.
[0035] Please see again Figure 1 In the projection screen structure provided in this embodiment, the vibration dissipation unit 20 is a coating comprising a viscoelastic material, which is formed on two opposite surfaces of the screen body 10 to damp and dissipate the vibration generated by the screen body 10.
[0036] Optionally, when the vibration dissipation unit 20 is a coating containing viscoelastic material, its coupling structure with the screen body 10 is not limited to being formed on two opposite surfaces of the screen body 10. It can be based on different screen performance requirements and can adopt a coupling method formed on at least one end surface of the screen body 10 to damp and dissipate the vibration generated by the screen body 10.
[0037] See also Figure 2 In the projection screen structure provided in another embodiment of the present application, the vibration dissipation unit 20 is a sheet-like object containing viscoelastic material, which is connected to one end of the screen body 10 and together with the screen body 10 constitutes the projection screen to damp and dissipate the vibration generated by the screen body 10.
[0038] Optionally, when the vibration dissipation unit 20 is a sheet containing viscoelastic material, its coupling structure with the screen body 10 is not limited to being connected to one end of the screen body 10. It can be coupled around the screen body 10 or at least at one end according to different screen performance requirements to damp and dissipate the vibration generated by the screen body 10.
[0039] Please see again Figure 3 In the projection screen structure provided in another embodiment of the present application, the vibration dissipation unit 20 is a clamping member comprising a viscoelastic material, which is clamped at one end of the screen body 10 to damp and dissipate the vibration generated by the screen body 10.
[0040] Optionally, when the vibration dissipation unit 20 is a clamping member comprising viscoelastic material, its coupling structure with the screen body 10 is not limited to being clamped at one end of the screen body 10. It can be clamped around the four sides of the screen body 10 or at least at one end to damp and dissipate the vibration generated by the screen body 10 according to different screen performance requirements.
[0041] It can be understood that, in the present application, the vibration dissipation unit 20 mainly utilizes its own material properties to reduce the vibration of the screen body 10 by converting the vibration of the screen body 10 into non-vibration forms of energy such as heat energy. Therefore, the coupling method between the vibration dissipation unit 20 and the screen body 10 is not limited to the above structure. As long as the coupling structure enables the vibration dissipation unit 20 to receive the vibration of the screen body 10, it can be used in the present application as the coupling structure between the vibration dissipation unit 20 and the screen body 10.
[0042] It should be explained that, in the present application, one end of the screen body 10 , including the plane where each side surface of the screen body is located, only needs to be able to couple with the vibration dissipation unit 20 .
[0043] See also Figure 4 , based on the structure that the vibration dissipation unit 20 utilizes its own material properties to reduce the vibration of the screen body 10 by converting the vibration of the screen body 10 into non-vibration energy such as heat energy, in the present application, a preferred structure of the screen body 10 is also provided, the screen body 10 includes a substrate 11, a reflective layer 12 and a reinforcing layer 13, wherein the substrate 10 includes a first surface 111 and a second surface 112 opposite to each other, wherein the first surface 111 faces the projection device and is used as a light-receiving surface.
[0044] The reflective layer 12 is formed on the first surface 111 and is used to reflect the projected image in the direction of the field of view. The reinforcing layer 13 is formed on the second surface 112 and is used to adjust the curling performance of the substrate 11 .
[0045] It is worth noting that, in this embodiment, the reflectivity of the reflective layer 12 to visible light is ≥ 85% or more, and more preferably, the reflectivity of the reflective layer 12 to visible light is ≥ 92% or more. Since the roll-up screen is often used in a bright environment, the reflective layer made of a material with high reflectivity can allow more light to enter the human eye. At the same time, since rubber has poor heat resistance, more light is reflected by the reflective layer, which reduces the heat converted by the silicone absorbing light, thereby increasing the service life of the roll-up screen.
[0046] In this embodiment, the reflective layer 12 is a coating containing rubber, preferably, the reflective layer 12 is a silicone rubber coating. In this embodiment, silicone rubber is selected as the coating, which can improve the reflectivity of the reflective layer 12 and make the scattering angle of the screen larger, so as to better remove the influence of ambient light on the projection.
[0047] It should be noted that in this embodiment, the rubber refers to a highly elastic polymer material with reversible deformation, which is elastic at room temperature, can produce a large deformation under a small external force, and can return to its original shape after the external force is removed. The rubber can be a single-component rubber material or a mixture of multiple rubber materials.
[0048] It is more preferred to use a mixture of other rubber materials with waterproof properties and silicone rubber. This embodiment can make the reflective layer 12 not only wear-resistant but also more waterproof, thereby further improving the performance of the curling screen. In this embodiment, the reflectivity of the reflective layer 12 is ≥95%, and the heat resistance is better.
[0049] In this embodiment, the main purpose of using rubber coating for the reflective layer 12 is, on the one hand, to utilize the good elasticity of the rubber material to weaken and eliminate the vibration transmitted to the projection screen, thereby reducing and eliminating the jitter of the projection screen. At the same time, the elasticity of the rubber coating itself will not cause the projection screen to jitter. On the other hand, the adaptability of the rubber material to a large temperature range can ensure that the projection screen can maintain stable performance in different temperature environments.
[0050] It should be noted that, in the present embodiment, the formula of the rubber coating used for the reflective layer 12 is not particularly limited. That is to say, according to different performance requirements, the material of the reflective layer 12 can be general-purpose rubbers such as isoprene rubber, styrene-butadiene rubber, butadiene rubber, chloroprene rubber and their modifications, or special rubbers such as nitrile rubber, silicone rubber, fluororubber, polysulfide rubber and their modifications, or can be formed by a synthetic coating with the above-mentioned rubber as the main component. As long as the rubber coating can meet the above-mentioned use requirements of this application, it can be used as the reflective layer 12.
[0051] Furthermore, in this embodiment, scattering particles 121 composed of materials known in the field of projection screens, such as aluminum silver powder and mica sheets, are dispersed inside or near the surface of the reflective layer 12. On the one hand, by doping the scattering particles 121 in the reflective layer 12, the projection light is reflected on the surface of the reflective layer 12 and diffused at the same time, so that the reflective layer 12 has a high reflectivity and a large scattering angle, thereby increasing the visible range of the projected image of the curled screen. On the other hand, by adding scattering particles 121 to the rubber layer, the elasticity of the rubber layer can also be improved to reduce or even avoid the screen jitter problem caused by the good elasticity of the rubber coating. In this embodiment, in order to better achieve the reflection and scattering effects, the scattering particles 121 are distributed in the rubber or silicone, and the reflectivity of the reflective layer 12 can reach more than 92%, so that the curled screen can be used in more scenes, such as outdoor, vehicle-mounted, etc.
[0052] In this embodiment, the reinforcing layer 13 can be formed by coating an adhesive such as silicone, acrylic resin, unsaturated polyester, polyurethane, epoxy resin, etc. on the second surface 112 of the substrate 11. The flexibility of the reinforcing layer 13 can be adjusted by adjusting the formula and thickness of the adhesive, thereby adjusting the curling performance of the substrate 11.
[0053] It can be understood that in the present application, the reinforcing layer 13 is not limited to being formed by coating optical glue on the second surface 112 of the substrate 11, but can also be formed by adhering a flexible substrate to the second surface 112 of the substrate 11. As long as the material can adjust the curling properties of the substrate 11, it can be used as the reinforcing layer 13.
[0054] Furthermore, in the present application, when the performance of the substrate 11 itself meets the design requirements, the reinforcement layer 13 may also be omitted.
[0055] It can be understood that in the present application, according to different product performance and optical requirements, the screen body 10 can further include functional layers commonly used on projection screens, such as a protective layer and a Fresnel optical layer, based on the above structure.
[0056] In this embodiment, a reflective layer 12 is provided on the substrate 11. The substrate 11 adopts fabric material as the main material, and the reflective layer 12 adopts rubber or silicone as the main material. The rubber or silicone is coated on the substrate 11. On the one hand, the fabric and rubber or silicone have similar temperature-sensitive properties, thereby effectively preventing the layer structures from falling off and ensuring the service life and performance of the curved screen. On the other hand, the fabric and rubber layer or silicone can effectively utilize the ductility of the fabric material to make the curved screen have better anti-vibration function.
[0057] The present application also provides a vehicle-mounted display screen, which includes the projection screen in the aforementioned embodiment.
[0058] Compared with the prior art, the above-mentioned projection screen and vehicle-mounted display screen provided in the present application couple the vibration dissipation unit at at least one end of the screen body, utilize the material properties of the vibration dissipation unit itself, and reduce the vibration of the screen body by converting the vibration of the screen body into non-vibration forms of energy such as heat energy.
[0059] Furthermore, when the screen body is a flexible screen, the vibration dissipation unit is preferably a viscoelastic damping unit comprising a viscoelastic material. In this case, the elastic and viscous characteristics of the viscoelastic material can be fully utilized. On the one hand, the elastic characteristics of the viscoelastic material can be utilized to ensure that the vibration dissipation unit does not affect the flexibility of the screen body. On the other hand, the viscous characteristics of the viscoelastic material can be utilized to convert the vibration generated by the screen body into heat energy and be quickly dissipated, thereby playing a vibration reduction role.
[0060] Furthermore, based on the vibration reduction mechanism of the vibration dissipation unit that can convert vibration into heat energy, the projection screen can be allowed to use materials such as rubber that have good elasticity and adaptability to a wide temperature range as the main material of the projection screen body. On the one hand, the vibration damping and dissipation mechanism of the vibration dissipation unit greatly reduces the elastic vibration caused by highly elastic materials such as rubber themselves. On the other hand, the good elasticity of the rubber material can be used to further weaken and eliminate the vibration transmitted to the projection screen, thereby reducing and eliminating the jitter of the projection screen. On the other hand, the adaptability of the rubber material to a wide temperature range can be used to ensure that the projection screen can maintain stable performance in different temperature environments.
[0061] Furthermore, when the reflective layer is made of a material including rubber having good elasticity and adaptability to a large temperature range, by doping the scattering particles in the reflective layer, the projection light is reflected on the surface of the reflective layer and diffused at the same time, so that the reflective layer has a high reflectivity and a large scattering angle, thereby increasing the visible range of the projected image of the projection screen. At the same time, by adding scattering particles to the rubber layer, the elasticity of the rubber layer can also be improved, further avoiding the screen jitter problem caused by the good elasticity of the rubber layer.
[0062] The above descriptions are merely embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.
Claims
1. A projection screen, comprising a screen body, characterized in that: A vibration dissipation unit is coupled to at least one end of the screen body, and the vibration dissipation unit is used to damp and dissipate the vibration of the screen body itself.
2. The projection screen according to claim 1, characterized in that: The vibration dissipation unit is a viscoelastic damping unit.
3. The projection screen according to claim 2, characterized in that: The viscoelastic damping unit is a coating layer containing a viscoelastic material, which is formed on at least one end surface of the screen body to damp and dissipate vibration generated by the screen body.
4. The projection screen according to claim 2, characterized in that: The viscoelastic damping unit is a sheet-like object containing viscoelastic material, which is connected to at least one end of the screen body and together with the screen body constitutes the projection screen to damp and dissipate the vibration generated by the screen body.
5. The projection screen according to claim 2, characterized in that: The viscoelastic damping unit is a clamping member including a viscoelastic material, which is clamped at at least one end of the screen body to damp and dissipate vibration generated by the screen body.
6. The projection screen according to claim 1, wherein: The screen body includes a substrate and a reflective layer formed on the substrate, wherein the reflective layer is a coating containing a rubber component.
7. The projection screen according to claim 6, characterized in that: The reflective layer is an organic silicon rubber coating.
8. The projection screen according to claim 7, characterized in that: The organic silicon rubber coating is doped with scattering particles.
9. A vehicle-mounted display screen, characterized in that: The vehicle-mounted display screen comprises the projection screen according to any one of claims 1 to 8.
10. The vehicle-mounted display screen according to claim 9, characterized in that: The projection screen is a flexible screen.