A cloud layer projection display system

Abstract

The present application discloses a cloud layer projection display system, comprising: a projection device, the projection device is used to emit image light; a reflection device, the reflection device is arranged on the optical path of the image light emitted by the projection device, and is used to guide the deflection of the image light; a light adjustment device, the light adjustment device is arranged on the optical path of the image light guided by the reflection device, and the light adjustment device is used to adjust the optical parameters of the image light; a cloud layer carrier, the cloud layer carrier is used to receive the image light processed by the light adjustment device; wherein the light adjustment device can adjust the optical parameters of the image light according to the state of the image carrier. The present application can further improve the display effect of the cloud layer projection by arranging a light adjustment device between the projection device and the image carrier, which is used to adjust the optical parameters of the image light in real time according to the current state of the carrier.

Description

Technical Field

[0001] The invention relates to the field of projection display, and in particular to a cloud layer projection display system. Background Art

[0002] Laser projection technology is currently used in many fields, such as holographic projection, immersive projection, and stage projection display. Compared with traditional projection, laser projection has a longer projection distance, larger projected content, and higher projection brightness. However, the problem with projection is that the projection must be displayed on a specific background, such as a wall. If there is no background for the image, the irradiated light beam will be emitted far away and decay in the air until it disappears.

[0003] We know that visible light will reflect and scatter when it encounters matter, and can form an image. Clouds, as a large medium, are composed of water molecules, which have strong reflection and scattering effects on specific waveforms and also have the characteristics of imaging. Clouds are huge and have a certain height. If images can be displayed on them, such as simple characters, patterns, company logos, etc., it will have a very shocking effect. It can be foreseen that if the relevant technology can be realized, cloud projection will have huge application demand. However, clouds in the sky are unpredictable, appearing and disappearing from time to time, and are in a state of motion. It is difficult to form a perfect image on them using existing projectors. Summary of the invention

[0004] The invention provides a cloud layer projection display system to solve the problem of poor cloud layer projection effect in the prior art.

[0005] In order to solve the above problems, a technical solution adopted by the present invention is: to provide a cloud projection display system, comprising:

[0006] A projection device, the projection device being used to emit image light;

[0007] A reflecting device, the reflecting device is arranged on the optical path of the image light emitted by the projection device, and is used to guide the deflection of the image light;

[0008] a light adjustment device, the light adjustment device being arranged on the optical path of the image light guided by the reflecting device, the light adjustment device being used to adjust the optical parameters of the image light;

[0009] A cloud carrier, the cloud carrier being used to receive the image light processed by the light adjustment device;

[0010] The light adjustment device can adjust the optical parameters of the image light according to the state of the image carrier.

[0011] According to an embodiment provided in the present application, the light adjusting device includes a driving component, and the driving component drives the light adjusting device to move.

[0012] According to an embodiment provided in the present application, the light adjustment device includes a lens group, and the lens group includes at least one lens unit.

[0013] According to an embodiment provided in the present application, the lens group includes at least one convex lens, and the convex lens is used to converge the incident image light.

[0014] According to an embodiment provided in the present application, the lens group includes at least one concave lens, and the concave lens is used to diverge the incident image light.

[0015] According to an embodiment provided in the present application, the lens group includes a plurality of lens units distributed in an array, and the different lens units are used to receive the image light from different areas.

[0016] According to an embodiment provided in the present application, the light adjustment device includes a plurality of light-concentrating devices, and the plurality of light-concentrating devices are used to receive image light and emit non-uniformly distributed pattern light.

[0017] According to an embodiment provided by the present application, the light adjustment device includes a color modification element, and the color modification element includes a filter for intercepting the wavelength of the image light.

[0018] According to an embodiment provided in the present application, the light adjustment device includes a polarization element, and the polarization element includes a polarizer for converting a deflection state of the image light.

[0019] According to an embodiment provided in the present application, the light adjustment device further includes a heat dissipation component for dissipating heat from the light adjustment device.

[0020] Beneficial effect: Different from the prior art, the present application sets a light adjustment device between the projection device and the image carrier to adjust the optical parameters of the image light in real time according to the current state of the carrier. When the cloud layer becomes larger, the size of the pattern projected on the cloud layer should be increased in time. When the cloud layer becomes smaller, the size of the pattern projected on the cloud layer should be reduced in time, which can further improve the display effect of the cloud projection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a projection display system provided by the present application;

[0022] Figure 2 is a schematic diagram of Embodiment 1 of the light adjustment device of the present application;

[0023] Figure 3 is a schematic diagram of a second embodiment of the light adjustment device of the present application;

[0024] Figure 4is a schematic diagram of Embodiment 3 of the light adjustment device of the present application;

[0025] Figure 5 is a schematic diagram of Embodiment 3 of the light adjustment device of the present application;

[0026] Figure 6 is a schematic diagram of Embodiment 3 of the light adjustment device of the present application;

[0027] Figure 7 is a schematic diagram of a fourth embodiment of the light adjustment device of the present application;

[0028] Figure 8 is a schematic diagram of a fifth embodiment of the light adjustment device of the present application;

[0029] Fig. 9 Schematic diagram of an embodiment of a light adjustment device of the present application. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] A cloud layer projection display system, comprising:

[0033] A projection device, the projection device being used to emit image light;

[0034] A reflecting device, the reflecting device is arranged on the optical path of the image light emitted by the projection device, and is used to guide the deflection of the image light;

[0035] a light adjustment device, the light adjustment device being arranged on the optical path of the image light guided by the reflecting device, the light adjustment device being used to adjust the optical parameters of the image light;

[0036] A cloud carrier, the cloud carrier being used to receive the image light processed by the light adjustment device;

[0037] Wherein, the light adjustment device can adjust the optical parameters of the image light according to the state of the cloud carrier.

[0038] The technical solution of the present application is described below in conjunction with specific embodiments.

[0039] Please refer to Figure 1 , a projection display system, comprising a projection device 10, a reflection device 11, a light adjustment device 12 and a cloud carrier 13;

[0040] The projection device 10 is used to emit image light. In this embodiment, the image light emitted by the projection device 10 is collimated light. The projection device 10 includes a laser projector with a spatial light modulation scheme such as DMD, LCOS or LCD. It can be understood that for scenes with a shorter projection distance, an LED projector or a lamp projector can also be used.

[0041] Furthermore, the projection device includes but is not limited to one projector. It is understandable that, in other implementations, a larger range of environmental projection can be achieved by splicing and fusing multiple projectors.

[0042] Furthermore, for occasions where the projected image is relatively simple, a projector can be replaced by a projection lamp.

[0043] The reflection device 11 is used to reflect the image light emitted by the projection device 10 to guide the deflection of the image light. The reflection device 11 includes a reflection prism or a reflection mirror. Specifically, the reflection prism is formed by coating a prism surface.

[0044] The light adjustment device 12 is used to receive the image light reflected by the reflection device 11, and the light adjustment device 12 is used to process the received image light to improve the display effect of the image light on the image carrier.

[0045] The light adjusting device further comprises a heat dissipation component, which comprises a heat dissipation fin or a water cooling component. The heat dissipation component is used to reduce the temperature of the light adjusting device and improve the reliability of the light adjusting device.

[0046] The cloud carrier 13 is the imaging area of ​​the image light, that is, by projecting the image light onto the cloud carrier 13, the pattern information contained in the image light can be seen by the crowd. It should be noted that the cloud carrier 13 includes gas carriers such as clouds and water vapor. Of course, any medium that can reflect or scatter the image light can be used as a carrier for projecting the image light.

[0047] Taking a cloud carrier as an example to illustrate the present application, normally, the pattern projected on the cloud should be smaller than or equal to the size of the cloud. At this time, the cloud can present the most complete pattern. However, as a gas carrier that is greatly affected by environmental changes, the cloud is erratic in a windy environment, and the size of the cloud changes anytime and anywhere. Therefore, it is difficult to adjust the image light once so that the image light can perfectly match the state of the cloud. The present application sets a light adjustment device between the projection device and the cloud to adjust the optical parameters of the image light in real time according to the current state of the cloud to improve the display effect of the cloud projection.

[0048] Specifically, when the clouds become larger, the size of the pattern projected on the clouds should be increased in time, and when the clouds become smaller, the size of the pattern projected on the clouds should be reduced in time; in addition, when a large cloud layer is dispersed into multiple small clouds, the pattern projected on the cloud layer should be divided in time, so that the different patterns after division are projected on different cloud layers respectively. The specific technical scheme of the light adjustment device is explained below.

[0049] Embodiment 1 of the light adjustment device

[0050] like Figure 2 As shown, the light adjustment device of this embodiment includes a convex lens 121. Since the convex lens 121 has the function of converging the incident image light, the divergence angle of the light emitted through the convex lens 121 is reduced to a certain extent, that is, the size of the pattern light projected on the image carrier after passing through the convex lens 121 will change. Specifically, when the size of the cloud layer increases, the convex lens is moved toward the direction close to the cloud layer to reduce the distance between the convex lens and the cloud layer, so that the pattern light projected on the cloud layer becomes larger; when the size of the cloud layer decreases, the convex lens is moved away from the cloud layer to increase the distance between the convex lens and the cloud layer, so that the pattern light projected on the cloud layer becomes smaller.

[0051] Embodiment 2 of the light adjustment device

[0052] like Figure 3 As shown, the light adjustment device of this embodiment includes a concave lens 122. Since the concave lens 122 has the function of diverging the incident image light, the divergence angle of the light emitted through the concave lens 122 is increased to a certain extent, that is, the size of the pattern light projected on the image carrier after passing through the concave lens 122 will change. Specifically, when the size of the cloud layer increases, the concave lens is moved away from the cloud layer to increase the distance between the concave lens and the cloud layer, so that the pattern light projected on the cloud layer becomes larger; when the size of the cloud layer decreases, the concave lens is moved toward the cloud layer to reduce the distance between the convex lens and the cloud layer, so that the pattern light projected on the cloud layer becomes smaller.

[0053] Embodiment 3 of the light adjustment device

[0054] like Figures 4 to 6 As shown, the light adjustment device of this embodiment includes a lens group, wherein the lens group includes a first lens and a second lens, wherein the central axes of the first lens and the second lens coincide with each other.

[0055] like Figure 4 As shown, the first lens and the second lens are both convex lenses. Since the convex lens has the function of converging the incident light, the divergence angle of the total light beam emitted by the lens group composed of the first lens and the second lens is greatly reduced. At this time, the projection display system can be applied to situations where the cloud size changes more dramatically.

[0056] like Figure 5 As shown, the first lens 121 is a convex lens and the second lens 122 is a concave lens. Since the convex lens has the function of converging the incident light and the concave lens has the function of diverging the incident light, the divergence and convergence of the output pattern light can be achieved by controlling the distance between the first lens and the second lens. At this time, the projection display system can be applied to the scene where the light adjustment device cannot be moved as a whole, and the change of the output light pattern can be achieved by adjusting the positional relationship between the lenses included in the light adjustment device.

[0057] like Figure 6 As shown, the first lens and the second lens are both concave lenses. Since the concave lens has the effect of diverging the incident light, the divergence angle of the total light beam emitted by the lens group composed of the first lens and the second lens is greatly increased. At this time, the projection display system can be applied to situations where the cloud size changes more dramatically.

[0058] Embodiment 4 of the light adjustment device

[0059] like Figure 7 As shown, the light adjustment device of this embodiment includes a plurality of lens units 125 distributed in an array, wherein each lens unit is used to receive image light. Further, the collimated light beam emitted from the reflection device 11 is projected onto the surface of the plurality of lens units 125 distributed in an array, and is spatially divided into many sub-beams by the plurality of lens units distributed in an array, each lens unit corresponds to a sub-beam, each sub-beam is projected onto a different cloud layer carrier, and the patterns on the plurality of different cloud layer carriers are spliced ​​to display a complete image. It is understandable that in other embodiments, the distribution of the lens units 125 can be dynamically adjusted according to the positional relationship of different cloud layer carriers.

[0060] In other embodiments, Fig. 9As shown, the light adjustment device includes a plurality of light concentrators 129, which can be distributed in an array or non-uniformly, and the light concentrator includes a light input end and a light output end, and the light input end is used to receive image light and adjust the light output direction of the image light entering the light concentrator. Furthermore, the collimated light beam emitted from the reflection device 11 is projected onto the light input ends of the plurality of light concentrators 129, and is spatially divided into many sub-image lights by the plurality of light concentrators 129, each sub-image light is projected onto a different cloud layer carrier, and the patterns on the plurality of different cloud layer carriers are spliced ​​to display a complete image. It is understandable that in other embodiments, the light output direction of the light concentrator 129 can be dynamically adjusted according to the positional relationship of different cloud layer carriers.

[0061] Embodiment 5 of the light adjustment device

[0062] like Figure 8 As shown, the light adjustment device of this embodiment includes a filter device 126, wherein the filter device 126 includes a filter wheel composed of a plurality of filter areas and transparent areas. In different time periods, the filter area or transparent area of ​​the filter device is arranged on the optical path of the image light. Specifically, the reflectivity of the light wavelength contained in the image light is different at different cloud layers at different heights, and the propagation of light of different wavelengths in the air is different. At this time, in order for the people on the ground to see the cloud layer projection pattern more clearly, the image light wavelength can be dynamically adjusted according to the display effect of the projected image light on the cloud layer. Under normal circumstances, the transparent area of ​​the filter device 126 is arranged on the optical path of the image light, and the image light emitted by the projection device is projected on the cloud layer through the transparent area. If the people on the ground can clearly see the projection pattern, the filter device is not adjusted at this time; when the people on the ground cannot clearly see the projection pattern, at this time, the other filter areas of the filter device are arranged on the optical path of the image light, which can filter out a part of the spectrum with relatively weak penetration and retain a part of the spectrum with relatively strong penetration, so as to improve the display effect of the cloud layer projection display.

[0063] It can be understood that the light adjustment device also includes a polarization element for adjusting the polarization state of the image light, and the polarization element can be a polarization device such as PCS, PBS, etc.

[0064] The above are only implementation modes of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent results or equivalent process changes made using the contents of the present invention's specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A cloud projection display system, comprising: A projection device, the projection device being used to emit image light; A reflecting device, the reflecting device is arranged on the optical path of the image light emitted by the projection device, and is used to guide the deflection of the image light; a light adjustment device, the light adjustment device being arranged on the optical path of the image light guided by the reflecting device, the light adjustment device being used to adjust the optical parameters of the image light; A cloud carrier, the cloud carrier being used to receive the image light processed by the light adjustment device; Wherein, the light adjustment device can adjust the optical parameters of the image light according to the state of the cloud carrier; the light adjustment device includes a plurality of focusing devices, and the plurality of focusing devices are used to receive the image light and emit non-uniformly distributed pattern light.

2. The cloud layer projection display system according to claim 1, characterized in that: The light adjusting device comprises a driving component, and the driving component drives the light adjusting device to move.

3. The cloud layer projection display system according to claim 2, characterized in that: The light adjustment device comprises a lens group, and the lens group comprises at least one lens unit.

4. The cloud layer projection display system according to claim 3, characterized in that: The lens group includes at least one convex lens, and the convex lens is used to converge the incident image light.

5. The cloud layer projection display system according to claim 3, characterized in that: The lens group includes at least one concave lens, and the concave lens is used to diverge the incident image light.

6. The cloud layer projection display system according to claim 3, characterized in that: The lens group includes a plurality of lens units distributed in an array, and different lens units are used to receive the image light in different areas.

7. The cloud layer projection display system according to claim 2, characterized in that: The light adjustment device includes a color modification element, and the color modification element includes a filter for intercepting the wavelength of the image light.

8. The cloud layer projection display system according to claim 2, characterized in that: The light adjustment device includes a polarization element including a polarizing plate for converting a deflection state of image light.

9. The cloud layer projection display system according to claim 1, characterized in that: The light adjusting device further comprises a heat dissipation component for dissipating heat from the light adjusting device.

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