CN108693694B - Double-sided imaging projection system, method and stereoscopic image projection system using same - Google Patents
Double-sided imaging projection system, method and stereoscopic image projection system using same Download PDFInfo
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- CN108693694B CN108693694B CN201710223787.1A CN201710223787A CN108693694B CN 108693694 B CN108693694 B CN 108693694B CN 201710223787 A CN201710223787 A CN 201710223787A CN 108693694 B CN108693694 B CN 108693694B
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/60—Projection screens characterised by the nature of the surface
- G03B21/604—Polarised screens
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B35/00—Stereoscopic photography
- G03B35/18—Stereoscopic photography by simultaneous viewing
- G03B35/26—Stereoscopic photography by simultaneous viewing using polarised or coloured light separating different viewpoint images
Abstract
The invention discloses a double-sided imaging projection system, which projects a first image light with a first polarization direction to one side of a double-sided perspective polarizing film through a first polarization projection device, projects a second image light with the first polarization direction to the other side of the double-sided perspective polarizing film through a second polarization projection device, the first reflection powder layer on one surface of the double-sided see-through polarizing film receives and diffusely reflects first image light with a first polarization direction, the second reflection powder layer on the other surface of the double-sided see-through polarizing film receives and diffusely reflects second image light with the first polarization direction, and a transmission axis of the polarizing layer of the double-sided see-through polarizing film is perpendicular to the first polarization direction and does not transmit the first image light and the second image light with the first polarization direction, so that the technical effect of double-sided projection imaging is realized.
Description
Technical Field
The present invention relates to a projection system and method, and more particularly to a two-sided image projection system and method and a stereoscopic image projection system using the same.
Background
With the development of science and technology, various invention projection screens have been developed, wherein a perspective projection screen becomes one of the products of great interest.
The perspective projection screen is used for enabling audiences to see scenery behind the projection screen through the projection screen and clearly watching projected images on the projection screen. However, the light beams at the two sides of the perspective projection screen affect the quality of the projected image, and when the two sides of the perspective projection screen receive the projected images respectively, the projected light beams of the two projected images interfere with each other, so that the audience cannot view the complete projected image at the same side.
In summary, it is known that there is a problem that the two-sided projection function of the perspective projection screen cannot be realized due to the mutual influence of the projected light beams at the two sides in the prior art, and therefore, it is necessary to provide an improved technical means to solve the problem.
Disclosure of Invention
The invention discloses a double-sided imaging projection system, a method and a stereoscopic image projection system applied by the same.
First, the present invention discloses a double-sided imaging projection system, which comprises: the double-sided perspective polarizing film is arranged between the first polarization projection equipment and the second polarization projection equipment. The first polarized light projection device is used for projecting first image light with a first polarization direction, and the second polarized light projection device is used for projecting second image light with the first polarization direction. The double-sided see-through polarizing film comprises: the light source comprises a first reflection powder layer, a second reflection powder layer and a polarization layer, wherein the polarization layer is arranged between the first reflection powder layer and the second reflection powder layer, the first reflection powder layer is used for receiving and diffusely reflecting first image light rays with a first polarization direction, the second reflection powder layer is used for receiving and diffusely reflecting second image light rays with the first polarization direction, the polarization layer is provided with a transmission axis, and the transmission axis is vertical to the first polarization direction.
In addition, the invention discloses a double-sided imaging projection method, which comprises the following steps: disposing a double-sided see-through polarizing film between the first polarized projection device and the second polarized projection device, wherein the double-sided see-through polarizing film comprises: the device comprises a first reflection powder layer, a second reflection powder layer and a polarization layer, wherein the polarization layer is arranged between the first reflection powder layer and the second reflection powder layer and is provided with a transmission axis; the first polarized light projection equipment projects first image light with a first polarization direction to one side of the double-sided perspective polarizing film, wherein the transmission axis is vertical to the first polarization direction; the second polarized light projection equipment projects second image light with the first polarization direction to the other side of the double-sided perspective polarizing film; and the first reflection powder layer receives and diffusely reflects the first image light with the first polarization direction, the second reflection powder layer receives and diffusely reflects the second image light with the first polarization direction, and the polarizing layer prevents the first image light with the first polarization direction and the second image light from penetrating through the polarizing layer.
Furthermore, the present invention discloses a stereoscopic image projection system using the dual-sided image projection system, the stereoscopic image projection system comprising: the two-sided perspective polarizing film is vertically placed between the first polarization projection equipment and the second polarization projection equipment, and the control device is connected with the first polarization projection equipment, the second polarization projection equipment and the overlook projection device. The first polarized light projection equipment is used for projecting first image light with a first polarization direction, the second polarized light projection equipment is used for projecting second image light with the first polarization direction, and the overlook projection device is used for projecting overlook image light on the double-sided see-through polarized film from the upper part of the top surface of the double-sided see-through polarized film. The double-sided see-through polarizing film comprises: the light source comprises a first reflection powder layer, a second reflection powder layer and a polarization layer, wherein the polarization layer is arranged between the first reflection powder layer and the second reflection powder layer, the first reflection powder layer is used for receiving and diffusely reflecting first image light rays with a first polarization direction, the second reflection powder layer is used for receiving and diffusely reflecting second image light rays with the first polarization direction, the polarization layer is provided with a transmission axis, and the transmission axis is vertical to the first polarization direction. The control device is used for synchronously controlling the first polarized light projection equipment, the second polarized light projection equipment and the overlook projection device so that the first image light with the first polarization direction projected by the first polarized light projection equipment, the second image light with the first polarization direction projected by the second polarized light projection equipment and the overlook image light projected by the overlook projection device present a three-dimensional image on the double-sided perspective polarizing film. The first image light, the second image light and the overlooking image light are respectively the front surface, the back surface and the overlooking prerecorded three-dimensional image light of the object.
The difference between the two-sided display projection system and the method thereof disclosed by the invention and the prior art is that the two-sided display projection system projects a first image light with a first polarization direction on one side of the two-sided transparent polarizing film through the first polarized light projection equipment, projects a second image light with the first polarization direction on the other side of the two-sided transparent polarizing film through the second polarized light projection equipment, the first reflection powder layer on one surface of the double-sided see-through polarizing film receives and diffusely reflects first image light with a first polarization direction, the second reflection powder layer on the other surface of the double-sided see-through polarizing film receives and diffusely reflects second image light with the first polarization direction, and the transmission axis of the polarizing layer of the double-sided see-through polarizing film is arranged to be perpendicular to the first polarization direction and does not transmit the first image light with the first polarization direction and the second image light.
In addition, when the dual-sided imaging projection system disclosed by the invention is applied to a stereoscopic image projection system, the control device synchronously controls the first polarization projection device, the second polarization projection device and the overhead projection device, so that the first image light with the first polarization direction (namely, the prerecorded three-dimensional image light on the front surface of the object) projected by the first polarization projection device, the second image light with the first polarization direction (namely, the prerecorded three-dimensional image light on the back surface of the object) projected by the second polarization projection device and the overhead image light (namely, the prerecorded three-dimensional image light on the overhead surface of the object) projected by the overhead projection device present a stereoscopic image on the dual-sided see-through polarization film.
By the technical means, the invention can realize the technical effects of double-sided projection imaging and stereoscopic projection imaging.
Drawings
FIG. 1 is a schematic diagram of a system architecture of a dual-sided imaging projection system according to the present invention.
Fig. 2A is a structural schematic view of a double-sided see-through polarizing film according to a first embodiment of the present invention.
Fig. 2B is a structural schematic view of a double-sided see-through polarizing film according to a second embodiment of the present invention.
Fig. 3A is a structural schematic view of a double-sided see-through polarizing film according to a third embodiment of the present invention.
Fig. 3B is a schematic structural view of a double-sided see-through polarizing film according to a fourth embodiment of the present invention.
Fig. 3C is a schematic structural view of a double-sided see-through polarizing film according to a fifth embodiment of the present invention.
Fig. 4A is a schematic structural view of a double-sided see-through polarizing film according to a sixth embodiment of the present invention.
Fig. 4B is a schematic structural view of a double-sided see-through polarizing film according to a seventh embodiment of the invention.
Fig. 4C is a schematic structural view of an eighth embodiment of a double-sided see-through polarizing film according to the present invention.
Fig. 5 is a flowchart of a method of the dual-sided imaging projection system of fig. 1.
FIG. 6 is a schematic diagram of a system architecture of a stereoscopic image projection system using a dual-sided image projection system according to the present invention.
Description of the symbols:
10. 60 first polarizer
11 first reflective powder
12. 62 first projection device
13 first adhesive
20. 90 second polarizer
21 second reflective powder
22. 92 second projection device
23 second adhesive
32 polarization substrate
34 first protective film
36 second protective film
40 third adhesive
50 top surface
70 first see-through glass layer
80 second transparent glass layer
100 double-sided image projection system
110. 310 first polarization projection device
120. 320 second polarized projection device
130. 330 double-sided perspective polarizing film
132 first reflective powder layer
134 second reflective powder layer
136 polarizing layer
300 stereoscopic image projection system
340 overlook projection device
350 control device
Detailed Description
The following detailed description of the embodiments of the present invention will be provided in conjunction with the accompanying drawings and examples, so that how to implement the technical means for solving the technical problems and achieving the technical effects of the present invention can be fully understood and implemented.
Referring to fig. 1, fig. 1 is a schematic diagram of a system architecture of a dual-sided imaging projection system of the present invention, in which a dual-sided imaging projection system 100 includes: the dual-side see-through polarizing film 130 is disposed between the first polarization projection device 110 and the second polarization projection device 120.
The first polarized projection device 110 is used for projecting a first image light having a first polarization direction. The first polarized light projection apparatus 110 may include a first polarizer 10 and a first projection device 12, and light projected by the first projection device 12 passes through the first polarizer 10 to form a first image light having a first polarization direction. In practical implementation, the first projection device 12 may be selected from any one of the following: a Digital Light Processing (DLP) projection device, a Liquid Crystal On Silicon (LCOS) projection device, and a Liquid Crystal Display (LCD) projection device, the first polarizer 10 may be sleeved On a lens of the first projection device 12 for projecting Light or configured in front of the lens of the first projection device 12 for projecting Light by means of a mechanism design, so that the Light projected by the first projection device 12 passes through the first polarizer 10 to form a first image Light with a first polarization direction, but the present embodiment is not limited to the present invention. For example, the first polarizer 10 may also be pre-disposed inside the first projection device 12, so that the light to be projected by the first projection device 12 passes through the first polarizer 10 and then projects a first image light having a first polarization direction.
The second polarized projection device 120 is used for projecting a second image light having the first polarization direction. The second polarized light projection apparatus 120 includes a second polarizer 20 and a second projection device 22, and the light projected by the second projection device 22 passes through the second polarizer 20 to form a second image light having the first polarization direction. In practical implementation, the second projection device 22 can be selected from any one of the following: in the DLP projection device, the LCOS projection device and the LCD projection device, the second polarizer 20 may be sleeved on the lens of the second projection device 22 for projecting the light or configured in front of the lens of the second projection device 22 for projecting the light by means of a mechanical design, so that the light projected by the second projection device 22 passes through the second polarizer 20 to form the second image light having the first polarization direction, but the embodiment is not limited to the invention. For example, the second polarizer 20 may also be pre-disposed inside the second projection device 22, so that the light to be projected by the second projection device 22 passes through the second polarizer 20 and then projects a second image light having the first polarization direction.
Referring to fig. 2A, fig. 2A is a structural schematic view of a double-sided see-through polarizing film according to a first embodiment of the present invention. The double-sided see-through polarizing film 130 includes: the first and second reflective powder layers 132, 134, and the polarizing layer 136, wherein the polarizing layer 136 is disposed between the first and second reflective powder layers 132, 134. The first and second reflective powder layers 132 and 134 can be, but are not limited to, see-through reflective powder layers.
The first reflective powder layer 132 is used for receiving and diffusely reflecting the first light with the first polarization direction. In practical implementation, the first polarization direction may be a P polarization direction, but this example is not intended to limit the present invention. In other words, the first polarization direction may also be the S polarization direction. The first reflective powder layer 132 includes a plurality of first reflective powders 11 and first adhesives 13, the first adhesives 13 are used for adhering the first reflective powders 11 to one side of the polarizing layer 136, and the first reflective powders 11 diffusely reflect the first light with the first polarization direction. The material of the first reflective powder 11 can be, but is not limited to, selected from the group consisting of pearl powder, silver powder and aluminum powder, and the material of the first adhesive 13 can be, but is not limited to, epoxy resin or ultraviolet curable glue.
The second reflective powder layer 134 is used for receiving and diffusely reflecting the second light with the first polarization direction. The second reflective powder layer 134 includes a plurality of second reflective powders 21 and a second adhesive 23, the second adhesive 23 is used to adhere the second reflective powders 21 to the other side of the polarizer layer 136 opposite to the first reflective powder layer 132, and the second reflective powders 21 are used to diffusely reflect the second light with the first polarization direction. The material of the second reflective powder 21 can be, but is not limited to, a material selected from the group consisting of pearl powder, silver powder, and aluminum powder, and the material of the second adhesive 23 can be, but is not limited to, epoxy resin or ultraviolet curable glue.
The polarizing layer 136 has a transmission axis that is disposed perpendicular to the first polarization direction, and the polarizing layer 136 transmits light having the second polarization direction. The first polarization direction and the second polarization direction are perpendicular to each other, and the transmission axis and the second polarization direction are parallel to each other.
When the dual-sided see-through polarizing film 130 of the present embodiment is applied to a see-through projection screen, two sides of the dual-sided see-through polarizing film 130 can be respectively used for receiving a projection image, a polarization direction of a projection light of the projection image is a first polarization direction, and since the first reflective powder layer 132 and the second reflective powder layer 134 of the dual-sided see-through polarizing film 130 diffusely reflect a light having the first polarization direction and a transmission axis of the polarizing layer 136 is perpendicular to the first polarization direction, the light having the first polarization direction cannot penetrate through the film, the dual-sided see-through polarizing film 130 can achieve a technical effect of dual-sided projection imaging. In addition, since the polarizing layer 136 can transmit the light having the second polarization direction, and the light existing in the environment has the light having the first polarization direction and the light having the second polarization direction, which is not reflected by the first and second reflective powder layers 132 and 134, of the light existing in the environment can transmit the polarizing layer 136, so that the viewer can see the scenery behind the polarizing film 130 through the two-sided see-through polarizing film.
Next, referring to fig. 2B, fig. 2B is a structural schematic view of a double-sided see-through polarizing film according to a second embodiment of the present invention. In this embodiment, the polarizing layer 136 may include: the polarizing substrate 32, the first protection film 34 and the second protection film 36, and the polarizing substrate 32 is disposed between the first protection film 34 and the second protection film 36. In the present embodiment, the material of the polarizing substrate 32 may be, but is not limited to, polyvinyl acetate (PVA), and the materials of the first protective film 34 and the second protective film 36 may be, but is not limited to, Triacetyl cellulose (TAC). In other words, the material of the first protective film 34 and the second protective film 36 may also be Cyclo Olefin Polymer (COP), polyethylene terephthalate (PET), polymethyl methacrylate (PMMA), or Polycarbonate (PC).
The first protective film 34 and the second protective film 36 are respectively adhered to two sides of the polarizing substrate 32 by a third adhesive 40. The third adhesive 40 can be, but is not limited to, a water gel.
In addition, in order to prevent the double-sided see-through polarizing film 130 from being damaged by the external environment, the double-sided see-through polarizing film 130 may further include at least one first see-through glass layer 70 (as shown in fig. 3A to 3C, fig. 3A is a structural diagram of a third embodiment of the double-sided see-through polarizing film of the present invention, fig. 3B is a structural diagram of a fourth embodiment of the double-sided see-through polarizing film of the present invention, and fig. 3C is a structural diagram of a fifth embodiment of the double-sided see-through polarizing film of the present invention). In fig. 3A, the number of the first see-through glass layers 70 is one, and the first see-through glass layers are disposed on the first reflective powder layer 132; in fig. 3B, the number of the first see-through glass layers 70 is one, and the first see-through glass layers are disposed on the second reflective powder layer 134; in fig. 3C, the number of the first see-through glass layers 70 is two, and the two first see-through glass layers are respectively disposed on the first reflective powder layer 132 and the second reflective powder layer 134.
Furthermore, in order to increase the thickness or the hardness of the dual-sided see-through polarizing film 130, the dual-sided see-through polarizing film 130 may further include at least one second see-through glass layer 80 (as shown in fig. 4A to 4C, fig. 4A is a schematic structural view of a sixth embodiment of the dual-sided see-through polarizing film of the present invention, fig. 4B is a schematic structural view of a seventh embodiment of the dual-sided see-through polarizing film of the present invention, and fig. 4C is a schematic structural view of an eighth embodiment of the dual-sided see-through polarizing film of the present invention). In fig. 4A, the number of the second see-through glass layers 80 is one, and the second see-through glass layers are disposed between the first reflective powder layer 132 and the polarizing layer 136; in fig. 4B, the number of the second see-through glass layers 80 is one, and the second see-through glass layers are disposed between the second reflective powder layer 134 and the polarizing layer 136; in fig. 4C, the number of the second see-through glass layers 80 is two, and the two second see-through glass layers are respectively disposed between the first reflective powder layer 132 and the polarizer layer 136 and between the second reflective powder layer 134 and the polarizer layer 136.
Next, referring to fig. 5, fig. 5 is a flowchart of a method of the double-sided imaging projection system of fig. 1, which includes the steps of: disposing a dual-sided see-through polarizing film 130 between the first polarized projection apparatus 110 and the second polarized projection apparatus 120, wherein the dual-sided see-through polarizing film 130 comprises: a first reflective powder layer 132, a second reflective powder layer 134, and a polarizing layer 136, the polarizing layer 136 being disposed between the first reflective powder layer 132 and the second reflective powder layer 134, the polarizing layer 136 having a transmission axis (step 210); the first polarized light projection device 110 projects a first image light having a first polarization direction on one side of the dual-sided see-through polarizing film 130, wherein the transmission axis is perpendicular to the first polarization direction (step 220); the second polarization projection device 120 projects a second image light having the first polarization direction on the other side of the dual-sided see-through polarization film 130 (step 230); and the first reflective powder layer 132 receives and diffusely reflects the first image light with the first polarization direction, the second reflective powder layer 134 receives and diffusely reflects the second image light with the first polarization direction, and the polarizer layer 136 prevents the first image light with the first polarization direction and the second image light from penetrating through the polarizer layer 136 (step 240). Through the above steps, the first polarized light projection device 110 projects the first image light with the first polarization direction to one side of the dual-sided see-through polarization film 130, the second polarized light projection device 120 projects the second image light with the first polarization direction to the other side of the dual-sided see-through polarization film 130, the first reflection powder layer 132 on one side of the double-sided see-through polarizing film 130 receives and diffusely reflects the first image light with the first polarization direction, the second reflection powder layer 134 on the other side of the double-sided see-through polarizing film 130 receives and diffusely reflects the second image light with the first polarization direction, and the transmission axis of the polarizing layer 136 of the double-sided see-through polarizing film 130 is arranged to be perpendicular to the first polarization direction without transmitting the first image light and the second image light with the first polarization direction, so as to realize the technical effect of double-sided projection imaging.
Since the first polarized light projection apparatus 110 includes the first polarizer 10 and the first projection device 12, step 220 further includes: the light projected by the first projection device 12 passes through the first polarizer 10 to form a first image light having a first polarization direction; and a first image light having a first polarization direction is incident on the double-sided see-through polarizing film 130.
Since the second polarized light projection apparatus 120 includes the second polarizer 20 and the second projection device 22, step 230 further includes: the light projected by the second projection device 22 passes through the second polarizer 20 to form a second image light having the first polarization direction; and a second image light having the first polarization direction is incident on the double-sided see-through polarizing film 130.
Referring to fig. 6, fig. 6 is a schematic system architecture diagram of a stereoscopic image projection system using a dual-sided image projection system according to the present invention. The stereoscopic image projection system 300 includes: the two-sided perspective polarizing film 330 is vertically placed between the first polarization projection device 310 and the second polarization projection device 320, and the control device 350 is connected with the first polarization projection device 310, the second polarization projection device 320 and the perspective projection device 340.
The first polarization projection device 310 is configured to project a first image light having a first polarization direction on one side of the double-sided see-through polarization film 330, the second polarization projection device 320 is configured to project a second image light having the first polarization direction on the other side of the double-sided see-through polarization film 330, and the overhead projection device 340 is configured to project an overhead image light from above the top surface 50 of the double-sided see-through polarization film 330.
The structure and application of the dual-sided see-through polarizing film 330 in the present embodiment are the same as those of the dual-sided see-through polarizing film 130, and are not described herein again. Therefore, the first reflective powder layer (not shown) of the dual-sided see-through polarizing film 330 receives and diffusely reflects the first image light having the first polarization direction, the second reflective powder layer (not shown) receives and diffusely reflects the second image light having the first polarization direction, and the transmission axis of the polarizing layer (not shown) is disposed perpendicular to the first polarization direction so that the light having the first polarization direction cannot penetrate therethrough, thereby enabling the dual-sided see-through polarizing film 330 to achieve the technical effect of dual-sided projection imaging.
The control device 350 is configured to synchronously control the first polarized light projection device 310, the second polarized light projection device 320 and the overhead view projection device 340, so that the first image light with the first polarization direction projected by the first polarized light projection device 310, the second image light with the first polarization direction projected by the second polarized light projection device 320 and the overhead view image light projected by the overhead view projection device 340 present a stereoscopic image on the double-sided see-through polarizing film 330. The first image light, the second image light and the overlooking image light are respectively the front surface, the back surface and the overlooking prerecorded three-dimensional image light of the object. Therefore, when the first polarization projection device 310, the second polarization projection device 320 and the top projection device 340 are controlled by the control device 350 to synchronously project the first image light with the first polarization direction, the second image light with the first polarization direction and the top image light on the two opposite sides and the top surface 50 of the dual-sided see-through polarization film 330, a stereoscopic image of the object can be displayed.
The first polarized light projection device 310 is used for projecting a first image light having a first polarization direction. The first polarized light projection apparatus 310 includes a first polarizer 60 and a first projection device 62, and light projected by the first projection device 62 passes through the first polarizer 60 to form a first image light having a first polarization direction. The second polarized projection device 320 is used for projecting a second image light having the first polarization direction. The second polarized light projection apparatus 320 includes a second polarizer 90 and a second projection device 92, and the light projected by the second projection device 92 passes through the second polarizer 90 to form a second image light having the first polarization direction.
In practical implementation, the first projecting device 62, the second projecting device 92 and the top-view projecting device 340 may be any one of the following devices: DLP projection devices, LCOS projection devices, and LCD projection devices.
In order to vertically place the dual-sided see-through polarizing film 330 between the first polarization projection apparatus 310 and the second polarization projection apparatus 320, the stereoscopic image projection system 300 may further include a support frame (not shown) for supporting the dual-sided see-through polarizing film 330, but the present disclosure is not limited thereto. For example, when the thickness of the dual-sided see-through polarizer 330 is increased (as the dual-sided see-through polarizer 130 shown in fig. 4A to 4C) or the projection area of the dual-sided see-through polarizer 330 required by the user is not large, the dual-sided see-through polarizer 330 can be vertically placed between the first polarization projection apparatus 310 and the second polarization projection apparatus 320 without being supported by a support frame. It should be noted that the installation of the supporting frame does not affect the projection area of the double-sided see-through polarization film 330 required by the user.
In summary, it can be seen that the difference between the dual-sided imaging projection system and the method thereof of the present invention and the prior art is that the first polarization projection device projects a first image light having a first polarization direction to one side of the dual-sided see-through polarization film, the second polarization projection device projects a second image light having the first polarization direction to the other side of the dual-sided see-through polarization film, such that the first reflection powder layer on one side of the dual-sided see-through polarization film receives and diffusely reflects the first image light having the first polarization direction, the second reflection powder layer on the other side of the dual-sided see-through polarization film receives and diffusely reflects the second image light having the first polarization direction, the transmission axis of the polarization layer of the dual-sided see-through polarization film is disposed perpendicular to the first polarization direction and does not transmit the first image light and the second image light having the first polarization direction, the technical means can solve the problems in the prior art and further realize the technical effect of double-sided projection imaging.
In addition, when the dual-sided imaging projection system disclosed by the invention is applied to a stereoscopic image projection system, the control device synchronously controls the first polarized light projection device, the second polarized light projection device and the overhead projection device, so that the first image light with the first polarization direction (namely the prerecorded three-dimensional image light on the front surface of the object) projected by the first polarized light projection device, the second image light with the first polarization direction (namely the prerecorded three-dimensional image light on the back surface of the object) projected by the second polarized light projection device and the overhead image light (namely the overhead prerecorded three-dimensional image light on the overhead projection device) projected by the overhead projection device present a stereoscopic image on the dual-sided see-through polarizing film, thereby realizing the technical effect of stereoscopic projection imaging.
Although the present invention has been described with reference to the foregoing embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.
Claims (10)
1. A dual-sided imaging projection system, comprising:
the first polarized light projection equipment is used for projecting first image light with a first polarization direction;
the second polarized light projection equipment is used for projecting second image light with the first polarization direction; and
a double-sided see-through polarizing film disposed between the first polarized projection device and the second polarized projection device, the double-sided see-through polarizing film comprising: the polarizer comprises a first reflection powder layer, a second reflection powder layer and a polarizer layer, wherein the polarizer layer is arranged between the first reflection powder layer and the second reflection powder layer, the first reflection powder layer is used for receiving and diffusely reflecting the first image light with the first polarization direction, the second reflection powder layer is used for receiving and diffusely reflecting the second image light with the first polarization direction, the polarizer layer is provided with a transmission axis, and the transmission axis is vertical to the first polarization direction and does not transmit the first image light with the first polarization direction and the second image light with the first polarization direction.
2. The dual-sided imaging projection system of claim 1, wherein the first polarized projection apparatus comprises a first polarizer and a first projection device, and the first image light having the first polarization direction is formed by the light projected by the first projection device after passing through the first polarizer; the second polarized light projection equipment comprises a second polarizer and a second projection device, and the light projected by the second projection device forms second image light with the first polarization direction after passing through the second polarizer.
3. The dual-sided imaging projection system of claim 2, wherein the first projection device and the second projection device are selectively any one of: digital Light Processing (DLP) projection devices, Liquid Crystal On Silicon (LCOS) projection devices, and Liquid Crystal Display (LCD) projection devices.
4. The dual-sided imaging projection system of claim 1, wherein the dual-sided see-through polarizer film is further configured to transmit light having a second polarization direction, the first polarization direction and the second polarization direction are perpendicular to each other, and the transmission axis and the second polarization direction are parallel to each other.
5. The dual-sided imaging projection system of claim 1, wherein the first and second reflective powder layers are see-through reflective powder layers.
6. A double-sided imaging projection method is characterized in that the method comprises the following steps:
disposing a dual-sided see-through polarizing film between the first polarized projection device and the second polarized projection device, wherein the dual-sided see-through polarizing film comprises: the device comprises a first reflection powder layer, a second reflection powder layer and a polarization layer, wherein the polarization layer is arranged between the first reflection powder layer and the second reflection powder layer and is provided with a transmission axis;
the first polarized light projection equipment projects first image light with a first polarization direction to one side of the double-sided perspective polarizing film, wherein the transmission axis is perpendicular to the first polarization direction;
the second polarized light projection equipment projects second image light with the first polarization direction to the other side of the double-sided perspective polarizing film; and
the first reflection powder layer receives and diffusely reflects the first image light with the first polarization direction, the second reflection powder layer receives and diffusely reflects the second image light with the first polarization direction, and the polarizing layer prevents the first image light with the first polarization direction and the second image light from penetrating through the polarizing layer.
7. The dual-sided imaging projection method of claim 6, wherein the first polarized projection apparatus comprises a first polarizer and a first projection device, and the step of projecting the first image light with the first polarization direction onto one side of the dual-sided transparent polarizer by the first polarized projection apparatus further comprises:
the light projected by the first projection device passes through the first polarizer to form the first image light with the first polarization direction; and
the first image light with the first polarization direction is incident on the double-sided see-through polarizing film.
8. The dual-sided imaging projection method of claim 6, wherein the second polarized projection apparatus comprises a second polarizer and a second projection device, and the step of projecting the second image light with the first polarization direction on the other side of the dual-sided transparent polarizer by the second polarized projection apparatus further comprises:
the light projected by the second projection device passes through the second polarizer to form the second image light with the first polarization direction; and
the second image light with the first polarization direction is incident to the double-sided see-through polarizing film.
9. A stereoscopic image projection system, comprising:
the first polarized light projection equipment is used for projecting first image light with a first polarization direction;
the second polarized light projection equipment is used for projecting second image light with the first polarization direction;
a double-sided see-through polarizing film disposed upright between the first polarized projection apparatus and the second polarized projection apparatus, the double-sided see-through polarizing film comprising: a first reflective powder layer, a second reflective powder layer, and a polarizing layer, wherein the polarizing layer is disposed between the first reflective powder layer and the second reflective powder layer, the first reflective powder layer is configured to receive and diffusely reflect the first image light having the first polarization direction, the second reflective powder layer is configured to receive and diffusely reflect the second image light having the first polarization direction, the polarizing layer has a transmission axis, and the transmission axis is perpendicular to the first polarization direction and does not transmit the first image light having the first polarization direction and the second image light having the first polarization direction;
the overlook projection device is used for projecting overlook image light on the double-sided transparent polarizing film from the upper part of the top surface of the double-sided transparent polarizing film; and
the control device is connected with the first polarized light projection device, the second polarized light projection device and the overlook projection device and is used for synchronously controlling the first polarized light projection device, the second polarized light projection device and the overlook projection device so as to enable the first image light with the first polarization direction projected by the first polarized light projection device, the second image light with the first polarization direction projected by the second polarized light projection device and the overlook image light projected by the overlook projection device to present a stereoscopic image on the double-sided perspective polarizing film, wherein the first image light, the second image light and the overlook image light are respectively the front and back of an object and the overlook three-dimensional image light.
10. The stereoscopic image projection system of claim 9, further comprising a support frame for supporting the double-sided see-through polarizing film such that the double-sided see-through polarizing film is vertically disposed between the first polarized projection device and the second polarized projection device.
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| CN109634048B (en) * | 2019-02-01 | 2021-06-18 | 腾讯科技（深圳）有限公司 | Projection screen and projection system for double-sided projection |
| JP7347278B2 (en) | 2020-03-12 | 2023-09-20 | 住友電気工業株式会社 | drawing system |
| WO2021227131A1 (en) * | 2020-05-14 | 2021-11-18 | 中影光峰激光影院技术（北京）有限公司 | Three-dimensional projection system |
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| JPH06230475A (en) * | 1993-02-05 | 1994-08-19 | Toppan Printing Co Ltd | Reflection type screen |
| CN1384928A (en) * | 1999-09-03 | 2002-12-11 | 3M创新有限公司 | Rear projection screen using birefringent optical film for asymmetric light scattering |
| TW200624992A (en) * | 2005-01-13 | 2006-07-16 | Prodisc Technology Inc | Conferecne assisatance equipment |
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| TW201616210A (en) * | 2014-10-24 | 2016-05-01 | 佳世達科技股份有限公司 | Projection device |
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| TWI559071B (en) * | 2015-06-26 | 2016-11-21 | 明基材料股份有限公司 | Projection system |
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| JPH06230475A (en) * | 1993-02-05 | 1994-08-19 | Toppan Printing Co Ltd | Reflection type screen |
| CN1384928A (en) * | 1999-09-03 | 2002-12-11 | 3M创新有限公司 | Rear projection screen using birefringent optical film for asymmetric light scattering |
| TW200624992A (en) * | 2005-01-13 | 2006-07-16 | Prodisc Technology Inc | Conferecne assisatance equipment |
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