CN117170169A - Anti-ambient light laser projection screen and projection display system - Google Patents
Anti-ambient light laser projection screen and projection display system Download PDFInfo
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- CN117170169A CN117170169A CN202311168524.7A CN202311168524A CN117170169A CN 117170169 A CN117170169 A CN 117170169A CN 202311168524 A CN202311168524 A CN 202311168524A CN 117170169 A CN117170169 A CN 117170169A
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- 239000002105 nanoparticle Substances 0.000 claims description 78
- 229910052751 metal Inorganic materials 0.000 claims description 34
- 239000002184 metal Substances 0.000 claims description 34
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 26
- 239000002245 particle Substances 0.000 claims description 10
- 239000010420 shell particle Substances 0.000 claims description 7
- 239000002078 nanoshell Substances 0.000 claims 1
- 230000002708 enhancing effect Effects 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 31
- 238000010586 diagram Methods 0.000 description 16
- 238000000034 method Methods 0.000 description 10
- 239000000377 silicon dioxide Substances 0.000 description 9
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 8
- 235000012239 silicon dioxide Nutrition 0.000 description 8
- 229910052709 silver Inorganic materials 0.000 description 6
- 239000004332 silver Substances 0.000 description 6
- 239000003086 colorant Substances 0.000 description 5
- 239000011247 coating layer Substances 0.000 description 4
- 238000003384 imaging method Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Abstract
The application provides an environment light resistant laser projection screen and a projection display system, comprising: a scattering component and a retroreflective layer positioned on one side of the scattering component; a side surface of the scattering component facing away from the retroreflective layer receives the projection laser light and the ambient light; the scattering component is used for scattering the projection laser; the scattering component is also used for transmitting ambient light; the retroreflective layer is used for carrying out reflection treatment on the ambient light transmitted through the scattering component, and enables the incident direction of the ambient light entering the retroreflective layer to be parallel to the emergent direction after reflection treatment and opposite to the emergent direction. The anti-ambient light laser projection screen only carries out scattering treatment on projection laser by using the scattering component to achieve the purpose of displaying images, has wavelength selectivity, and changes the ambient light passing through the scattering component by 180 degrees by combining with the reverse reflection layer, thereby realizing original return and further enhancing the anti-ambient light interference capability of the anti-ambient light laser projection screen.
Description
Technical Field
The application relates to the technical field of laser projection display, in particular to an environment light resistant laser projection screen and a projection display system.
Background
The transparent screen display technology can be applied to museum explanation, transparent projection display and the like for enhancing reality scenes, so that the explanation and demonstration effect is more vivid.
The important parameter in the effect evaluation of the transparent screen display is the contrast of ambient light (English full name: ambient Contrast Ratio, english abbreviation: ACR), and the ACR parameter describes the contrast of the whole screen display picture, and the expression is as follows:
the value of the ACR represents the influence degree of the projection light by the ambient light, and the larger the value of the ACR is, the smaller the influence degree of the ambient light on the projection light is.
Therefore, how to provide a laser projection screen with a strong light resistance is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the present application provides an anti-ambient light laser projection screen and a projection display system, which have the following technical schemes:
an ambient light resistant laser projection screen, the ambient light resistant laser projection screen comprising:
a scattering component and a retroreflective layer positioned on one side of the scattering component; wherein a side surface of the scattering component facing away from the retroreflective layer receives the projection laser light and ambient light;
the scattering component is used for scattering the projection laser;
the scattering component is also used for transmitting the ambient light;
the retroreflective layer is used for carrying out reflection treatment on the ambient light transmitted through the scattering component, and enables the incident direction of the ambient light to be incident into the retroreflective layer to be parallel to the emergent direction after reflection treatment and opposite to the emergent direction.
Preferably, in the above-mentioned anti-ambient light laser projection screen, the scattering component includes: a first nanoparticle, a second nanoparticle, and a third nanoparticle; the projection laser includes: a first laser light of a first wavelength, a second laser light of a second wavelength, and a third laser light of a third wavelength;
the first laser is red laser, the second laser is green laser, and the third laser is blue laser;
the first nano particles are used for carrying out scattering treatment on the first laser, the second nano particles are used for carrying out scattering treatment on the second laser, and the third nano particles are used for carrying out scattering treatment on the third laser.
Preferably, in the above-mentioned anti-ambient light laser projection screen, the scattering component further includes: a fourth nanoparticle;
the projection laser also comprises fourth laser with preset wavelength;
the fourth nano particles are used for carrying out scattering treatment on the fourth laser.
Preferably, in the above-mentioned anti-ambient light laser projection screen, the first nanoparticles, the second nanoparticles, and the third nanoparticles are different in size.
Preferably, in the above-mentioned anti-ambient light laser projection screen, the first nanoparticles, the second nanoparticles, and the third nanoparticles have different duty ratios.
Preferably, in the above-mentioned anti-environmental light laser projection screen, the first nanoparticle, the second nanoparticle and the third nanoparticle are all nano metal spherical shell particles.
Preferably, in the above-mentioned anti-environmental light laser projection screen, the nano metal spherical shell particles include: a metal spherical shell and silica particles located within the metal spherical shell.
Preferably, in the above-mentioned anti-ambient light laser projection screen, the metal spherical shell of the first nanoparticle, the metal spherical shell of the second nanoparticle, and the metal spherical shell of the third nanoparticle have different thicknesses.
Preferably, in the above-mentioned anti-ambient light laser projection screen, the retroreflective layer includes a plurality of cube-corner prisms arranged in an array.
The application also provides a projection display system, which comprises a laser projector and the environment light resistant laser projection screen;
the laser projector is used for emitting projection laser.
Compared with the prior art, the application has the following beneficial effects:
the application provides an environment light resistant laser projection screen, which comprises: a scattering component and a retroreflective layer positioned on one side of the scattering component; wherein a side surface of the scattering component facing away from the retroreflective layer receives the projection laser light and ambient light; the scattering component is used for scattering the projection laser; the scattering component is also used for transmitting the ambient light; the retroreflective layer is used for carrying out reflection treatment on the ambient light transmitted through the scattering component, and enables the incident direction of the ambient light to be incident into the retroreflective layer to be parallel to the emergent direction after reflection treatment and opposite to the emergent direction. The anti-ambient light laser projection screen only carries out scattering treatment on projection laser by using the scattering component to achieve the purpose of displaying images, has wavelength selectivity, and changes the ambient light passing through the scattering component by 180 degrees by combining with the reverse reflection layer, thereby realizing original return and further enhancing the anti-ambient light interference capability of the anti-ambient light laser projection screen.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present application, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a prior art structure;
FIG. 2 is a schematic diagram of a second related art structure;
FIG. 3 is a schematic diagram of a third corresponding structure of the prior art;
FIG. 4 is a schematic diagram of a fourth embodiment of the prior art;
FIG. 5 is a schematic diagram of a fifth embodiment of the prior art;
FIG. 6 is a schematic side view of an anti-ambient light laser projection screen according to an embodiment of the present application;
FIG. 7 is a schematic front view of an anti-ambient light laser projection screen according to an embodiment of the present application;
fig. 8 is a schematic diagram of a three-dimensional regular triangular prism according to an embodiment of the present application;
FIG. 9 is a schematic diagram of a dove prism according to an embodiment of the present application;
fig. 10 is a schematic structural diagram of a projection display system according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Based on the background, in order to increase the ACR value, the brightness of the projected light and/or the brightness of the ambient light may be increased, and the current technology of increasing the ACR value in the prior art is mainly implemented by adding a special structure or material to the screen, and the following description will take four prior arts as examples.
The first prior art is:
referring to fig. 1, fig. 1 is a schematic diagram of a corresponding structure in the prior art, four color blocks of different colors, namely red, green, blue and a specific color are covered on a screen, the specific color is any one of red, green and blue, white is taken as an example, the sum of the areas of every two adjacent four color blocks is smaller than or equal to the size of a pixel point, the screen is covered with the color blocks of various colors to reduce the reflection of the ambient white light, and half of the ambient white light injected into the screen is absorbed, thereby reducing the interference of the ambient light. Although the method can reduce the brightness of the ambient light, the light intensity of the projection light is also reduced at the same time, because the contrast of the ambient light is not improved enough.
And the second prior art is as follows:
referring to fig. 2, fig. 2 is a schematic diagram of a structure corresponding to the second prior art, the whole screen is composed of a left screen 1 and a right screen 2, a light shielding plate 3 is installed on the left side of the left screen 1 and the right side of the right screen 2, a first curtain 4 is covered on the outer side of the left screen 1, a second curtain 5 is covered on the outer side of the right screen 2, and light supplementing plates are installed on the backs of the left screen 1 and the right screen 2, so that effective light enhancement and interference of ambient light on the screen can be performed, but the design can only reduce the ambient light on the left side and the right side, and a large part of ambient light in front is reserved, so that the contrast of the ambient light is not high overall.
The third prior art is:
referring to fig. 3, fig. 3 is a schematic diagram of a structure corresponding to the third prior art, the front surface of the screen is provided with a plurality of micro-convex strips which are integrally in a zigzag shape, a light absorbing surface is formed on one side of each micro-convex strip, and a projection imaging layer is arranged on the other side of each micro-convex strip, so that interference of ambient light on projection imaging can be effectively resisted, but the screen structure can influence the scattering direction of projection light and influence the viewing effect.
The prior art is four:
referring to fig. 4, fig. 4 is a schematic structural diagram corresponding to the fourth prior art, the screen is composed of a transparent substrate 6, one side surface of the transparent substrate 6 is in a zigzag shape, a coating layer 7 is coated on the surface of the transparent substrate 6, projection light can penetrate through the transparent substrate 6 and irradiate onto the inclined surface imaging coating layer 7 to be reflected back in a directional manner, so that the reflected light is more concentrated in a sight line viewing center, the environmental light emitted from the obliquely upper side can be blocked, the imaging picture is not interfered by the environmental light, but the structural material can only absorb the environmental light from the obliquely upper side, and the absorbed light quantity is limited.
Fifth prior art:
referring to fig. 5, fig. 5 is a schematic diagram of a fifth corresponding structure in the prior art, in which a transparent screen is made of a transparent medium doped with at least three kinds of nanoparticles having different particle diameters, namely, three kinds of nanoparticles having different particle diameters shown by reference numerals 8, 9 and 10 in fig. 5, each of the nanoparticles having a resonant rayleigh scattering wavelength of a fixed wavelength, which corresponds to the light emission wavelength of a laser light source one by one, and each of the lasers can form resonant rayleigh scattering on the screen, thereby forming a real image. The head-up display system has no function of resisting ambient light, and because the brightness of the sun is high, the contrast ratio of the ambient light of the system is low, and the displayed image can be submerged by the ambient light (such as sunlight).
Projection display systems used at outdoor brightness require suppression of ambient light while ensuring image brightness. Based on the above, the embodiment of the application provides a scattering projection screen particle structure, wherein the surface microstructure is provided as particles of silicon dioxide wrapped by a silver shell, and the particles can be round or random irregular. The wavelength selectivity is realized by utilizing the surface resonance scattering property of the silica nano particles wrapped by the silver shell. The thickness of the silver coating layer and the diameter of the silicon dioxide particles determine the wavelength capable of scattering, and the high-efficiency scattering of the light sources of the three central wavelengths of red, green and blue of the laser display of the narrow-band spectrum can be realized by reasonably setting the proportion of the thickness of the silver coating layer and the diameter of the silicon dioxide particles, so that the function of directly transmitting the ambient light of the rest of the broadband spectrum can be realized. The projected surface is processed to form a pyramid array to reflect the transmitted broadband spectrum ambient light with a certain angle range in a 180-degree primary way, and most of the ambient light is shielded, so that the light-resistant function is realized. Because the sunlight is parallel light, the angle range is smaller, and the structure can greatly reduce the brightness of the environment light, thereby realizing the outdoor projection display function. And meanwhile, the light source is matched with the narrow bandwidth wavelength of the laser display light source, so that high-efficiency scattering is realized, and a projection display system with smaller influence of ambient light and higher contrast can be obtained.
In order that the above-recited objects, features and advantages of the present application will become more readily apparent, a more particular description of the application will be rendered by reference to the appended drawings and appended detailed description.
Referring to fig. 6, fig. 6 is a schematic side view of an environment-resistant laser projection screen according to an embodiment of the present application, and referring to fig. 7, fig. 7 is a schematic front view of an environment-resistant laser projection screen according to an embodiment of the present application, where the environment-resistant laser projection screen includes: a scattering component 11 and a retroreflective layer 12 positioned on one side of the scattering component 11; wherein a side surface of the scattering component 11 facing away from the retroreflective layer 12 receives the projection laser light and ambient light.
The scattering component 11 is used for scattering the projection laser; the scattering component 11 is also adapted to transmit the ambient light.
The retroreflective layer 12 is configured to reflect the ambient light transmitted through the scattering component 11, and make the incident direction of the ambient light incident on the retroreflective layer 12 parallel to and opposite to the outgoing direction after the reflection treatment.
Specifically, in this embodiment, the anti-ambient light laser projection screen uses the scattering component 11 to scatter the projection laser to achieve the purpose of displaying an image, has wavelength selectivity, and combines with the retroreflective layer 12 to change the ambient light passing through the scattering component by 180 degrees, thereby achieving the original return, and further enhancing the anti-ambient light interference capability of the anti-ambient light laser projection screen.
Alternatively, in another embodiment of the present application, the retroreflective layer 12 includes a plurality of cube-corner prisms arranged in an array. For example, the retroreflective layer 12 may include a plurality of cube-corner prisms arranged in an array or may include a plurality of cube-dove prisms arranged in an array. The three-dimensional triangular prism is preferably a three-dimensional regular triangular prism.
Optionally, in another embodiment of the present application, the scattering component 11 includes: a first nanoparticle 11a, a second nanoparticle 11b, and a third nanoparticle 11c; the projection laser includes: a first laser light of a first wavelength, a second laser light of a second wavelength, and a third laser light of a third wavelength.
The first laser is red laser, the second laser is green laser, and the third laser is blue laser.
The first nanoparticles 11a are used for scattering the first laser light, the second nanoparticles 11b are used for scattering the second laser light, and the third nanoparticles 11c are used for scattering the third laser light.
Specifically, in this embodiment, the projection laser is composed of RGB three primary color lasers, and each primary color is a single color light with a very narrow line width, theoretically, the anti-ambient light laser projection screen can achieve the purpose of displaying an image by only scattering the three kinds of narrow line width single color lasers, and theoretically, a higher gain can be obtained.
That is, the light emitted by one laser projector reaches the surface of the anti-ambient light laser projection screen, and the RGB three primary colors corresponding to the three different wavelengths are returned to human eyes through the scattering of the anti-ambient light laser projection screen scattering component to realize the purpose of displaying images.
Optionally, in another embodiment of the present application, the scattering component 11 further includes: and fourth nanoparticles.
The projection laser further comprises a fourth laser with a preset wavelength.
The fourth nano particles are used for carrying out scattering treatment on the fourth laser.
Specifically, in this embodiment, the fourth laser includes, but is not limited to, color lasers other than RGB three primary color lasers, such as yellow lasers, that is, the anti-ambient light laser projection screen provided in the embodiment of the present application has wavelength selectivity, and only the laser to be scattered may be scattered, so as to achieve the purpose of displaying an image.
It can be seen from the following that the nanoparticle particles can be composed of silicon dioxide wrapped by a metal spherical shell, the radius of the silicon dioxide spherical shell and the radius of the metal spherical shell jointly influence the resonant scattering wavelength of the silicon dioxide spherical shell, and the radius setting of the internal silicon dioxide is required to be increased along with the increase of the scattering center wavelength on the premise that the radius of the metal spherical shell wrapped outside is fixed. In the actual screen manufacturing process, the mixing proportion of three nano particles needs to be set according to the scattering intensity of the nano particles so as to ensure that the screen cannot be color cast.
It should be noted that, in the embodiment of the present application, but not limited to, the scattering treatment is performed on three RGB three primary colors laser with different wavelengths, and the scattering treatment may be performed on a fourth laser with a preset wavelength, and obviously, the scattering treatment may also be performed on laser with other wavelengths, that is, the three primary colors and above multi-wavelength may be applied.
Optionally, in another embodiment of the present application, the first nanoparticle 11a, the second nanoparticle 11b and the third nanoparticle 11c are different in size and/or the first nanoparticle 11a, the second nanoparticle 11b and the third nanoparticle 11c are different in duty ratio.
In particular, high efficiency scattering of laser light of different wavelengths is achieved in this embodiment by varying the size and/or duty cycle of the different nanoparticles.
Alternatively, in another embodiment of the present application, the first nanoparticle 11a, the second nanoparticle 11b, and the third nanoparticle 11c are all nano-metal spherical shell particles, for example, the nano-metal spherical shell particles include: a metal spherical shell and silica particles located within the metal spherical shell.
Specifically, in this embodiment, the thicknesses of the metal spherical shell of the first nanoparticle 11a, the metal spherical shell of the second nanoparticle 11b, and the metal spherical shell of the third nanoparticle 11c are different, and the sizes of the silica particles in the metal spherical shell of the first nanoparticle 11a, the silica particles in the metal spherical shell of the second nanoparticle 11b, and the silica particles in the metal spherical shell of the third nanoparticle 11c may also be different, so as to implement nanoparticles of different sizes, and in this embodiment, the metal spherical shells include, but are not limited to, silver metal spherical shells, wherein the shape of the silica particles may be circular, or may be any irregular shape, and in this embodiment, the metal spherical shells are silver metal spherical shells, and the shape of the silica particles is circular.
That is, the anti-ambient light laser projection screen provided by the embodiment of the application is mainly divided into two layers, wherein the first layer is the layer where the scattering component 11 is located, and can be also called a nanoparticle layer and is composed of a plurality of nanoparticles; the second layer is a retroreflective layer 12 composed of a plurality of cube-corner prisms arranged in an array. The first nanoparticles 11a, the second nanoparticles 11b and the third nanoparticles 11c of the first layer respectively represent nanoparticles capable of resonantly scattering red, green and blue three primary color wavelengths, an incident laser projection image is scattered by the three nanoparticles and enters the human eye, and most of ambient light passes through the layer where the scattering component 11 is located without being affected and is reflected reversely by the rear retroreflective layer 12 of the second layer and does not enter the human eye. Therefore, the influence of ambient light is effectively restrained, and high-contrast image display is realized. In the embodiment of the application, the nano particles adopt nano metal spherical shell particles, and resonance scattering of different wavelengths can be realized by controlling parameters such as the size of the metal spherical shell.
For nano-metal spherical shell particles with a dielectric constant ε (λ) and a nano-particle size much smaller than the wavelength, the ratio of the scattering cross sections at the resonant wavelength (λ0) and the non-resonant wavelength (λ0+Δλ) is:
wherein the scattering cross section sigma sca Refers to the probability of collision per unit time, and the larger the scattering cross section, the greater the intensity of scattered light. Epsilon is the complex permittivity of the metal, the real part of which is the refractive index and the imaginary part of which is the loss. Lambda (lambda) 0 For the scattering center wavelength, Δλ is the spectral width of the scattering wavelength, im (epsilon) represents the imaginary part of epsilon, and Re (epsilon) represents the real part of epsilon.
Based on the above formula, it can be seen that if a material has a smaller Im (epsilon) and a faster Re (epsilon) with a faster change in wavelength, the larger the scattering cross-section ratio, that is, the higher the wavelength selectivity of the scattering. This requires that the selected metallic material has a weaker loss in the visible range, with metallic silver (Ag) being more satisfactory, so silver materials are used to make the metallic spherical shell in embodiments of the present application.
Referring to fig. 8, fig. 8 is a schematic diagram of a three-dimensional regular triangular prism provided by the embodiment of the present application, where the three-dimensional regular triangular prism can be regarded as being formed by cutting an angle from a cube, light is incident from a triangular bottom surface (e.g. from a BOC plane) in any direction, and after being reflected by three perpendicular right angle surfaces, the emergent light is always parallel to the incident light, where the retroreflective layer 12 is formed by arranging a plurality of identical single triangular prisms, so as to realize the function of retroreflecting ambient light.
In fig. 8, only a three-dimensional regular triangular prism is described as an example, and the three-dimensional triangular prism constituting the retroreflective layer 12 may be another three-dimensional triangular prism, a dove prism, or the like. Referring to fig. 9, fig. 9 is a schematic diagram of a dove prism provided by the embodiment of the application, wherein the bottom surface of a single dove prism has a square structure, and the dove prism only reflects light which is emitted by a laser projector and is perpendicular to an anti-ambient-light laser projection screen to the human eye, and the light in the other directions is reflected and deviated from the direction of the human eye, so that stronger anti-ambient-light interference capability is realized.
In general, the three kinds of metal spherical shells with different specifications are doped in the environment-light-resistant laser projection screen to wrap the nano particles of the silicon dioxide particles, so that the selective scattering of the wavelength of the screen is realized, the back surface is designed into the retroreflective layer with the three-dimensional pyramid array structure, the environment-light resistance is further improved, the realized environment light contrast is higher, and the environment-light-resistant laser projection screen can be applied to laser projection display systems for outdoor and indoor illumination.
Optionally, according to the foregoing embodiment of the present application, a projection display system is further provided in another embodiment of the present application, and referring to fig. 10, fig. 10 is a schematic structural diagram of a projection display system provided in an embodiment of the present application, where the projection display system includes a laser projector and the above-mentioned anti-ambient light laser projection screen.
The laser projector is used for emitting projection laser.
The above description of the present application provides an environment light resistant laser projection screen and projection display system, and specific examples are applied to illustrate the principles and embodiments of the present application, and the above examples are only used to help understand the method and core idea of the present application; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.
It should be noted that, in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described as different from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
It is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include, or is intended to include, elements inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An ambient light resistant laser projection screen, the ambient light resistant laser projection screen comprising:
a scattering component and a retroreflective layer positioned on one side of the scattering component; wherein a side surface of the scattering component facing away from the retroreflective layer receives the projection laser light and ambient light;
the scattering component is used for scattering the projection laser;
the scattering component is also used for transmitting the ambient light;
the retroreflective layer is used for carrying out reflection treatment on the ambient light transmitted through the scattering component, and enables the incident direction of the ambient light to be incident into the retroreflective layer to be parallel to the emergent direction after reflection treatment and opposite to the emergent direction.
2. The ambient light resistant laser projection screen of claim 1, wherein the scattering assembly comprises: a first nanoparticle, a second nanoparticle, and a third nanoparticle; the projection laser includes: a first laser light of a first wavelength, a second laser light of a second wavelength, and a third laser light of a third wavelength;
the first laser is red laser, the second laser is green laser, and the third laser is blue laser;
the first nano particles are used for carrying out scattering treatment on the first laser, the second nano particles are used for carrying out scattering treatment on the second laser, and the third nano particles are used for carrying out scattering treatment on the third laser.
3. The ambient light resistant laser projection screen of claim 2, wherein the scattering assembly further comprises: a fourth nanoparticle;
the projection laser also comprises fourth laser with preset wavelength;
the fourth nano particles are used for carrying out scattering treatment on the fourth laser.
4. The ambient light resistant laser projection screen of claim 2, wherein the first, second and third nanoparticles are different in size.
5. The ambient light resistant laser projection screen of claim 2, wherein the first, second and third nanoparticles have different duty cycles.
6. The ambient light resistant laser projection screen of any of claims 1-5, wherein the first nanoparticle, the second nanoparticle, and the third nanoparticle are all nanoshell particles of metal.
7. The ambient light resistant laser projection screen of claim 6, wherein the nano-metal spherical shell particles comprise: a metal spherical shell and silica particles located within the metal spherical shell.
8. The ambient light resistant laser projection screen of claim 7, wherein the metal spherical shell of the first nanoparticle, the metal spherical shell of the second nanoparticle, and the metal spherical shell of the third nanoparticle are different in thickness.
9. The anti-ambient laser projection screen of claim 1, wherein the retroreflective layer comprises a plurality of cube corner prisms arranged in an array.
10. A projection display system comprising a laser projector and the ambient light resistant laser projection screen of any one of claims 1-9;
the laser projector is used for emitting projection laser.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311168524.7A CN117170169A (en) | 2023-09-11 | 2023-09-11 | Anti-ambient light laser projection screen and projection display system |
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| CN202311168524.7A CN117170169A (en) | 2023-09-11 | 2023-09-11 | Anti-ambient light laser projection screen and projection display system |
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| CN117170169A true CN117170169A (en) | 2023-12-05 |
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| CN202311168524.7A Pending CN117170169A (en) | 2023-09-11 | 2023-09-11 | Anti-ambient light laser projection screen and projection display system |
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