CN114077143A - Projection device, control method of projection device and projection system - Google Patents
Projection device, control method of projection device and projection system Download PDFInfo
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- CN114077143A CN114077143A CN202111290968.9A CN202111290968A CN114077143A CN 114077143 A CN114077143 A CN 114077143A CN 202111290968 A CN202111290968 A CN 202111290968A CN 114077143 A CN114077143 A CN 114077143A
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- 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
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Abstract
The invention discloses a projection device, a projection device control method and a projection system, and relates to the technical field of projection equipment. The projection device comprises an imaging unit, a light source and a control unit, wherein the imaging unit is used for providing an image bearing light beam which propagates along a projection light path; the first prism and the second prism are provided with a beam splitting surface connected with each other; the light splitting film is arranged on the light splitting surface; when the image bearing light beam is emitted from the first prism to the light splitting surface, part of the light beam of the image bearing light beam is reflected by the light splitting surface and then emitted from the first prism to the first projection surface to form a first projection image, the rest of the light beam of the image bearing light beam is emitted from the light splitting film to the second prism, and the rest of the light beam is emitted from the second prism to the second projection surface to form a second projection image. The projection device provided by the invention can realize the function of multi-projection through a single projection device.
Description
Technical Field
The invention relates to the technical field of display equipment, in particular to a projection device, a control method of the projection device and a projection system.
Background
In the related art, the projection system can only project images to a single screen, and the projection function is single.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a projection device, a control method of the projection device and a projection system, and aims to solve the technical problem that the projection function of the conventional projection system is single.
To achieve the above object, in a first aspect, the present invention provides a projection apparatus, comprising:
an imaging unit for providing an image-bearing light beam propagating along a projection light path;
the first prism and the second prism are provided with a beam splitting surface connected with each other;
the light splitting film is arranged on the light splitting surface; and
when the image bearing light beam is emitted from the first prism to the light splitting surface, part of the light beam of the image bearing light beam is reflected by the light splitting surface and then emitted from the first prism to the first projection surface to form a first projection image, the rest of the light beam of the image bearing light beam is emitted from the light splitting film to the second prism, and the rest of the light beam is emitted from the second prism to the second projection surface to form a second projection image.
In one embodiment, the first prism further comprises a first total reflection surface and a second total reflection surface;
the partial light beams are reflected to the first total reflection surface by the light splitting surface, the partial light beams are reflected to the second total reflection surface by the first total reflection surface, and the partial light beams are reflected by the second total reflection surface and then emitted to the first projection surface from the first prism to form a first projection image.
In an embodiment, the second total reflection surface is a concave surface or a convex surface, and the second total reflection surface is a spherical surface, an aspheric surface, or a free-form surface.
In one embodiment, the first prism has a first light incident surface, and the image bearing light beam enters the first prism from the first light incident surface;
an included angle between the first light incident surface and the first total reflection surface is a; wherein a is more than or equal to 110 degrees and less than or equal to 130 degrees.
In an embodiment, an included angle between the second total reflection surface and the first projection surface is b, and a curvature radius of any point of the second total reflection surface is Ri, wherein b is greater than or equal to 40 degrees and less than or equal to 50 degrees, and Ri is greater than or equal to 25mm and less than or equal to 60 mm.
In an embodiment, the second prism further includes a third reflection surface, and the third reflection surface is disposed obliquely with respect to the second light incident surface;
the remaining light beams are transmitted into the second prism from the light splitting surface, reflected by the third reflecting surface and then emitted from the second prism to the second projection surface to form a second projection image.
In an embodiment, the third reflective surface is a concave surface or a convex surface, and the third reflective surface is a spherical surface, an aspheric surface, or a free-form surface.
In an embodiment, an included angle between the first light incident surface and the light splitting surface is c, an included angle between the third reflecting surface and the second projection surface is d, and a radius of curvature of any point of the third reflecting surface is Rj, wherein c is greater than or equal to 30 degrees and less than or equal to 50 degrees, d is greater than or equal to 20 degrees and less than or equal to 30 degrees, and Rj is greater than or equal to 40mm and less than or equal to 120 mm.
In one embodiment, the light splitting film is detachably connected with the light splitting surface;
the projection apparatus further includes:
a total reflection film;
a fully transmissive film; and
the film layer switching assembly is connected with the total reflection film, the total transmission film and the light splitting film and has a first state, a second state and a third state, the film layer switching assembly is connected with the light splitting surface and the total reflection film in the first state, the film layer switching assembly is connected with the light splitting surface and the total transmission film in the second state, and the film layer switching assembly is connected with the light splitting surface and the light splitting film in the third state.
In a second aspect, the present invention also provides a control method based on the projection apparatus, where the method includes:
receiving an operation instruction of a user for selecting a target projection screen; the target projection screen comprises at least one of a first projection surface and a second projection surface;
determining a target working state of the film layer switching assembly based on the operation instruction;
controlling the film layer switching assembly to switch to a target working state;
and after the film layer switching assembly is switched to the target working state, controlling the imaging unit to emit light.
In a third aspect, the present invention further provides a projection system, comprising:
a projection device as described above; and
a control apparatus comprising a memory, a processor, and a projection device control program stored on the memory and executable on the processor, the projection device control program configured to implement the steps of the projection device control method as described above.
The invention provides a projection device and a control method of the projection device, wherein the projection device comprises an imaging unit for providing an image bearing light beam, and a first prism and a second prism which are positioned on a projection light path of the imaging unit, the first prism and the second prism are provided with a connected light splitting surface, a light splitting film is arranged on the light splitting surface, so that part of the light beam of the image bearing light beam is reflected to the first projection surface by the light splitting film to form a first projection image, and the rest of the light beam of the image bearing light beam is transmitted into the second prism from the light splitting film and then is emitted to the second projection surface to form a second projection image. Therefore, the image bearing light beam can be divided into 2 parts through the light splitting film to form independent projection images on different projection surfaces, so that the multi-projection function is realized through a single projection device, the use scenes of the projection device are enriched, and the user experience is improved.
Drawings
FIG. 1 is a schematic structural diagram of a projection apparatus according to a first embodiment of the present application;
FIG. 2 is a schematic view of a connection between a light splitting surface and a light splitting film of the projection apparatus according to the present application;
FIG. 3 is a schematic structural diagram of a projection apparatus according to a second embodiment of the present application;
FIG. 4 is a schematic structural diagram of a projection apparatus according to a third embodiment of the present application;
FIG. 5 is a flowchart illustrating a first embodiment of a control method of a projection apparatus according to the present application;
fig. 6 is a schematic structural diagram of a control device of the projection system of the present application.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the related art, most of the single projection devices are wall projection, and only one image can be formed on the wall in front of the projection lens. In practical use, however, the situation that the number of conference participants is too large and the conference participants need to be discussed in groups is inevitable, and at the moment, the requirement for using multiple groups of people is difficult to meet by a single projection image. And the use of multiple projection devices easily occupies space and is also easily limited by space, for example, the narrow and small meeting room causes the interference between the projection light paths of multiple projection devices or the interference between the projection light paths and the participants.
Therefore, the embodiments of the present application provide a projection apparatus, in which two prisms are disposed on a projection light path of an imaging unit, the two prisms have a connected splitting surface, and an image-bearing light beam of the imaging unit is split into 2 paths with different directions by a splitting film on the splitting surface and then emitted, so as to form different projection images on different projection surfaces.
The inventive concept of the present application is further illustrated below with reference to some specific embodiments.
Referring to fig. 1 and 2, fig. 1 shows a projection apparatus, and fig. 2 shows a schematic view of a connection between a light splitting film and a light splitting plane in the projection apparatus.
In the present embodiment, the projection apparatus includes an imaging unit 10, a first prism 21, a second prism 22, and a spectroscopic film 40.
The imaging unit 10 has at least one light emitting element for providing an image bearing light beam propagating along a projection light path. The first prism 21 is disposed on the projection light path, and the first prism 21 has a first light incident surface 211. The first prism 21 and the second prism 22 have a splitting surface 212 in contact with each other. The splitting plane 212 is disposed on a side of the first light incident plane 211 facing away from the imaging unit 10, the splitting plane 212 is disposed obliquely with respect to the projection light path, and referring to fig. 2, the splitting plane 212 is disposed with the splitting film 40. The second prism 22 has a second light incident surface connected to the light splitting surface 212. It is understood that the light splitting film 40 can also be disposed on the second light incident surface, and the embodiment is not limited thereto.
When the image bearing light beam is incident on the first light incident surface 211 into the first prism 21 and is incident on the splitting surface 212, a part of the image bearing light beam is reflected by the splitting surface 212 and then is emitted from the first prism 21 onto the first projection surface 1 to form a first projection image, the rest of the image bearing light beam is transmitted from the light splitting film 40 into the second prism 22, and the rest of the image bearing light beam is emitted from the second prism 22 onto the second projection surface 2 to form a second projection image.
Specifically, the imaging unit 10 is an optical-mechanical system of the projection apparatus, and at least includes an image processing unit for performing image processing on an input image signal and an image display element for receiving the image signal processed by the image processing unit and generating an optical image. Wherein the image display element comprises at least one light emitting element. The light emitting elements have respective driving circuits that control currents in each of the light emitting elements according to the image signals, and the light emitting elements generate optical images based on the generated currents. It can be understood that the imaging unit 10 has a light-emitting surface, and the direction of the optical axis of the light-emitting surface is the projection optical path of the imaging unit 10.
The first prism 21 and the second prism 22 constitute a prism set, and the prism set is disposed on the projection light path. And is spaced apart from the light exit surface of the imaging unit 10. The first prism 21 of the prism group is disposed on the side close to the imaging unit 10, and the second prism 22 is disposed on the side away from the imaging unit 10. The first prism 21 has a first light incident surface 211 facing the light emitting surface of the imaging unit 10, and the first light incident surface 211 is disposed opposite to the light emitting surface, so that the image-bearing light beam is completely transmitted through the first light incident surface 211. In one embodiment, the first light incident surface 211 may be perpendicular to the projection light path, so as to prevent the image-bearing light beam from being refracted at the first light incident surface 211 to affect the imaging quality.
The image-bearing light beam enters the first prism 21 from the first light incident surface 211 and then propagates to the light splitting surface 212. The splitting plane 212 is opposite to the first light incident plane 211 and is disposed obliquely. And the light splitting surface 212 has a light splitting film 40 thereon. The light splitting film 40 may have different light splitting effects according to the specific structure or material composition, that is, a specific light beam of the image bearing light beams is reflected, and the rest of the light beams are transmitted through the light splitting film 40. As in some embodiments, the light splitting film 40 may split the light beam into the reflected light beam 3 and the transmitted light beam 4 according to the difference in refractive index. In another embodiment, the splitting film 40 can reflect a specific beam in the spectrum to form the reflected beam 3, and the remaining beam to form the transmitted beam 4. Thus, part of the image bearing light beams, i.e., the reflected light beam 3, is reflected by the light splitting film 40 and then propagates in the first direction until the first projection image is formed on the first projection surface 11.
It is understood that the light emitting device can be controlled by the driving circuit, and when the driving circuit controls only the specific light beam reflected by the light splitting film 40 to be included in the image-bearing light beam emitted by the imaging unit 10, the image-bearing light beam is totally reflected by the light splitting film 40. Alternatively, when the driving circuit controls the imaging unit 10 to emit the image-bearing light beam without including the specific light beam reflected by the spectroscopic film 40, the image-bearing light beam at this time is entirely transmitted into the second prism 22 without being reflected.
Thus, in the present embodiment, the spectroscopic film 40 reflects part of the image bearing light beams in the first direction inside the first prism 21, and finally emits the reflected light beams from the first prism 21 to form the first projection image on the first projection surface 1.
The remaining part of the image-bearing light beam, i.e., the transmitted light beam, is transmitted through the splitting film 40 and enters the second prism 22. Referring to fig. 1 and 2, the second prism 22 has a second incident surface, and the second incident surface and the splitting surface 212 are attached to each other, so that the remaining light beams sequentially penetrate through the splitting film 40 and the second incident surface and then enter the second prism 22. The remaining light beam enters the second prism 22 and then continues to propagate along the direction of the projection light path, and then propagates inside the second prism 22 to the second projection surface 2 to form a second projection image.
In this embodiment, the image-bearing light beam is divided into two parts at the splitting film 40, wherein one part of the image-bearing light beam continues to propagate into the second prism 22 along the direction of the projection light path, and the other part of the image-bearing light beam is deflected at the splitting film 40, so as to form projection images on projection surfaces located at different positions of the imaging unit 10.
Referring to fig. 3, in an embodiment, the first prism 21 further includes a first total reflection surface 213 and a second total reflection surface 214.
The first total reflection surface 213 is disposed opposite to the splitting surface 212, the first total reflection surface 213 is disposed obliquely to the splitting surface 212, the second total reflection surface 214 and the splitting surface 212 are disposed on the same side of the first total reflection surface 213, and the second total reflection surface is disposed on one side of the splitting surface 212; the second total reflection surface is a concave surface or a convex surface.
Specifically, a part of the light beam is reflected by the splitting surface 212 to the first total reflection surface 213, the first total reflection surface 213 emits the part of the light beam to the second total reflection surface 214, and the second total reflection surface 214 reflects the part of the light beam and emits the reflected part of the light beam from the first prism 21 to the first projection surface 1 to form a first projection image.
Specifically, the splitting film 40 deflects a part of the light beam and transmits the deflected light beam in the first direction, and in order to adjust the size of the first projection image formed by the split light beam, the first prism 21 further includes a first total reflection surface 213 and a second total reflection surface 214, and since the second total reflection surface is located on the same side as the splitting surface 212 with respect to the first total reflection surface 213 and is disposed on the side of the splitting surface 212, the first total reflection surface 213 can deflect the whole part of the light beam onto the second total reflection surface 214, and the second total reflection surface 214 is a concave surface or a convex surface. When the second total reflection surface 214 is a concave surface, part of the light beam is substantially deflected back to the first direction inside the prism and is diffused, so that an enlarged first projection image is formed on the first projection surface 1. Alternatively, when the second total reflection surface 214 is convex, part of the light beam is substantially deflected back to the first direction inside the prism and is converged, thereby forming a reduced first projection image.
The second total reflection surface is a spherical surface, an aspheric surface or a free-form surface. The present embodiment does not limit this.
In this embodiment, the second total reflection surface 214 is set to be a concave surface to diffuse or converge the part of the light beam, so that the size of the first projection image can be adjusted to meet the requirements of different application scenes. If the desktop projection is realized, the second projection image is amplified, so that the projection image required by the multi-person meeting can be projected through the micro projection device, and the user experience is improved.
Part of the light beam can be refracted on the light-emitting surface of the first prism 21 to deflect the reflected light beam, so that the reflected light beam is deflected when passing through the light-emitting surface, is far away from or close to the projection device when being emitted to the placing plane where the projection device is located, and is orthographically projected on the first projection surface 1 as far as possible.
In an embodiment, an included angle between the first light incident surface 211 and the first total reflection surface is a, an included angle between the second total reflection surface and the first projection surface 1 is b, and a curvature radius of any point of the second total reflection surface is Ri, wherein a is greater than or equal to 110 degrees and less than or equal to 130 degrees, b is greater than or equal to 40 degrees and less than or equal to 50 degrees, and Ri is greater than or equal to 25mm and less than or equal to 60 mm.
Specifically, when the included angle between the first light incident surface 211 and the first total reflection surface is 110 ° to 130 °, the included angle between the second total reflection surface and the first projection surface 1 is 40 ° to 50 °, and the variation range of the curvature radius of any point of the second total reflection surface is 25mm to 60mm, the first projection image can be clearly seen, and the edge is not distorted, so as to ensure the projection quality of the first projection image. If the included angle between the first light incident surface 211 and the first total reflection surface and the included angle between the second total reflection surface and the first projection surface 1 exceed the above range, the projection of the first projection image on the first projection surface 1 is easily distorted, and the definition is affected. When the variation range of the curvature radius of any point of the second total reflection surface exceeds 25mm to 60mm, the imaging effect between the pixel points of the image formed by the imaging unit 10 is difficult to guarantee, and the definition of the image is further influenced.
Referring to fig. 3, in an embodiment, the second prism 22 further includes a third reflection surface 221, and the third reflection surface 221 is disposed obliquely with respect to the second light incident surface.
The remaining light beams are transmitted into the second prism 22 from the second light incident surface, reflected by the third reflection surface, and then emitted from the second prism 22 onto the second projection surface 2 to form a second projection image.
In order to adjust the size of the first projection image formed by the partial light beams, the second prism 22 further includes a third reflection surface 221, and the third reflection surface 221 is configured to deflect all the partial light beams in the second direction to form a second projection image on the second projection surface 2 on the side of the imaging unit 10 and to adjust the size of the second projection image.
Referring to fig. 1, the projection apparatus can be vertically placed on a desktop, the first projection plane 1 is located on a wall on the left side of the desktop, and a part of the light beam of the image-bearing light beam is reflected by the beam splitting plane 212 and finally transmitted to the wall to form a first projected image. The remaining light beam of the image bearing light beam is transmitted to the second prism 22, reflected by the third reflection surface 221, deflected in optical path, and returned to the desktop, thereby forming a second projected image on the side of the projection apparatus.
In this embodiment, a single projection device can simultaneously realize projection on two mutually perpendicular surfaces, and one of the surfaces can be a placement plane of the projection device, so that desk projection and wall projection are realized in the same way, and the projection use scene is improved. And the transmitted light beam 4 is deflected to the placing plane of the projection device to form a second projection image, so that the placing plane of the projection device can be fully utilized, the space utilization rate is improved, the problem that the number of users and the use space of two projection images projected on the wall are easily limited is avoided, and the environmental adaptability is improved.
The third reflective surface 221 is a concave surface or a convex surface. When the third reflection surface 221 is a concave surface, part of the light beam is substantially deflected and diffused inside the second prism 22, so that an enlarged second projection image is formed on the second projection surface 2. Alternatively, when the third reflecting surface 221 is convex, the remaining light beam is deflected and condensed inside the second prism 22, thereby forming a reduced second projection image.
Specifically, the third reflecting surface is a spherical surface, an aspherical surface, or a free-form surface. The present embodiment does not limit this.
An included angle between the first light incident surface 211 and the light splitting surface 212 is c, an included angle between the third reflecting surface and the second projection surface 2 is d, and the curvature radius of any point of the third reflecting surface is Rj, wherein c is more than or equal to 30 degrees and less than or equal to 50 degrees, d is more than or equal to 20 degrees and less than or equal to 30 degrees, and Rj is more than or equal to 40mm and less than or equal to 120 mm.
Specifically, when the included angle between the first light incident surface 211 and the splitting surface 212 is between 30 ° and 50 °, the included angle between the third reflecting surface and the second projection surface 2 is between 20 ° and 30 °, and the variation range of the curvature radius of any point of the third reflecting surface is between 40mm and 120mm, the second projection image can be clearly visible, and the edge is not distorted, so as to ensure the projection quality of the second projection image. If the included angle between the first light incident surface 211 and the splitting surface 212 and the included angle between the third reflecting surface and the second projection surface 2 exceed the above range, the projection of the second projection image on the second projection surface 2 is easily deviated from the optical path of the ideal orthographic projection, or the second projection image is too inclined, so that the image imaging effect is affected and the distortion occurs, and the definition is affected. When the variation range of the curvature radius of any point of the third reflecting surface exceeds 40mm to 120mm, the imaging effect between the pixels of the image formed by the imaging unit 10 is difficult to guarantee, and the definition of the image is further affected.
In one embodiment, the light splitting film 40 is detachably connected to the light splitting surface 212. The light splitting film 40 is detachably covered on the light splitting surface 212 so as to be attached to the light splitting surface 212 by an external force or detached from the light splitting surface 212 by an external force. Optionally, the splitting film 40 covers the whole splitting surface 212, so as to avoid the situation that the projection effect is affected due to the fact that the load-bearing light beam is staggered from the splitting surface 212.
The projection apparatus further includes: a total reflection film (not shown), a total transmission film (not shown), and a film layer switching member (not shown).
The film layer switching assembly is connected with the total reflection film, the total transmission film and the light splitting film 40, and has a first state, a second state and a third state, wherein in the first state, the film layer switching assembly is connected with the light splitting surface 212 and the total reflection film, in the second state, the film layer switching assembly is connected with the light splitting surface 212 and the total transmission film, and in the third state, the film layer switching assembly is connected with the light splitting surface 212 and the light splitting film 40.
The total reflection film can reflect all the image bearing light beams to form a reflection light beam, and the reflection light beam propagates along the first direction until a first projection image is formed on the first projection surface 1, so that in the first state, the projection device only obtains the first projection image on the first projection surface. The fully transmissive film allows the image-bearing light beam to be fully transmitted until a second projected image is formed on the second projection surface 2, so that, in the second state, the projection apparatus obtains the second projected image only on the second projection surface.
Specifically, the film layer switching assembly can attach one of the beam splitting film 40, the total reflection film or the total transmission film to the beam splitting surface 212 according to the requirement of the control command, and the remaining two of the three films are separated from the beam splitting surface 212. As an embodiment, the film layer switching assembly includes a rotatable three-jaw structure including a first jaw, a second jaw and a third jaw, the first jaw is connected with the second prism 22 attached with the total reflection film, the second jaw is connected with the second prism 22 attached with the total transmission film, and the third jaw is connected with the second prism attached with the spectroscopic film 40. The first claw, the second claw and the third claw have the same specification of the second prism. In the first state, the first claw of the three-claw structure rotates to the spectroscopic surface 212, and the second prism 22 on the first claw is connected to the first prism, so that the total reflection film is attached to the spectroscopic surface 212. When the state is switched from the first state to the second state, the first claw of the three-claw structure can move in a direction away from the light splitting surface 212 to separate the second prism 22 from the light splitting surface 212, and then the first claw of the three-claw structure rotates to be away from the light splitting surface 212, and simultaneously the second claw rotates to the light splitting surface 212, so that the second prism on the second claw is connected with the first prism, and the full transmission film is attached to the light splitting surface 212. When the second state is switched to the third state, the second claw of the three-claw structure can move in the direction away from the light splitting surface 212 to separate the full transmission film from the light splitting surface 212, and then the second claw of the three-claw structure rotates to be away from the light splitting surface 212, and simultaneously the third claw rotates to the light splitting surface 212, so that the second prism on the third claw is connected with the first prism, and the light splitting film 40 is attached to the light splitting surface 212. It is understood that the three-jaw structure can be switched from the third state to the first state or from the first state to the third state, and the embodiment is not limited thereto. In this embodiment, through the rete switching module that sets up, can make the switching in the projection arrangement alternative is in first projection screen projection alone, second projection screen projection alone, perhaps both projections three kinds of modes simultaneously to satisfy different application scenes needs, richen projection arrangement's function, improve user experience.
In one embodiment, the imaging unit 10 has a red light emitting element, a blue light emitting element, and a green light emitting element; the partial light beam is at least one of red light, blue light and green light.
In this embodiment, the red light emitting element emits R light, the blue light emitting element emits B light, and the green light emitting element emits G light. The imaging unit 10 also has an optical path modulator to combine the light of three colors.
And part of the light beam reflected by the light splitting film is at least one of red light, blue light and green light.
For example, the light splitting film can be configured to reflect one of the three RGB lights, such as R light, G light, B light, or any 2 of the three RGB lights, such as RG light, GB light. As shown in fig. 4, the reflected light beam 3 is G light, so that the effect of obtaining different colors of projected images in different application scenes is achieved in cooperation with the control of the light emitting element.
Based on the above hardware structure, a method for controlling a projection apparatus according to an embodiment of the present application is provided. Referring to fig. 5, fig. 5 is a flowchart illustrating a control method of a projection apparatus according to an embodiment of the disclosure.
In this embodiment, the method includes:
s101, receiving an operation instruction of a user for selecting a target projection screen; the target projection screen includes at least one of a first projection surface 1 or a second projection surface 2.
The execution subject of the present embodiment is a control device of a projection apparatus. When the projection device is used, the projection device can output alternative projection modes to a user through an interpersonal interaction interface or a display interface of the remote control terminal, such as a single first projection surface projection, a single second projection surface projection or a simultaneous projection of the two. Then, the control device may receive an operation instruction for selecting the target projection screen, which is input by the user, through the human interaction interface or the remote control terminal.
And S102, determining a target working state of the film layer switching assembly based on the operation instruction.
The control device stores the characteristics of the three states of the film layer switching assembly of the prism 20 of the projection device. Therefore, the target working state of the film layer switching assembly can be determined according to the requirements of the projection screen corresponding to the operation instruction, namely the projection of the first projection screen alone, the projection of the second projection screen alone or the simultaneous projection of the first projection screen and the second projection screen.
If the control device receives the operation instruction to project on the first projection screen, the target working state of the film layer switching assembly can be determined to be the first state.
And S103, controlling the film layer switching assembly to switch to a target working state.
After the target working state is determined, the film layer switching assembly can be controlled to be switched to the target working state from the current state, and preparation before projection is made.
And step S104, after the film layer switching assembly is switched to the target working state, controlling the imaging unit to emit light.
After the film layer switching assembly is switched to the target working state, a corresponding state switching in-place instruction can be sent to the control equipment. After receiving the state switching in-place instruction, the control device can control the light reflecting element in the imaging unit to emit light, so that an image bearing light beam is emitted to obtain a target projection image selected by a user.
In this embodiment, switch to corresponding target operating condition through the operating command that control rete switching element responded to different target projection screens to can switch in the projection of first projection screen alone, the projection of independent second projection screen, or both projections three kinds of modes simultaneously, with satisfy different application scenarios needs, richen projection arrangement's function, improve user experience.
As an embodiment, the present invention also provides a projection system including:
a projection device; and
a control device, the control device comprising: a memory 1005, a processor 1001 and a projection device control program stored on the memory and executable on the processor, the projection device control program being configured to implement the steps of the projection device control method as described above.
The specific structure of the projection apparatus refers to the above embodiments, and since the projection system adopts all technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a control device according to an embodiment of the present application.
As shown in fig. 6, the control apparatus may include: a processor 1001, such as a Central Processing Unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a WIreless interface (e.g., a WIreless-FIdelity (WI-FI) interface). The Memory 1005 may be a Random Access Memory (RAM) Memory, or may be a Non-Volatile Memory (NVM), such as a disk Memory. The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the configuration shown in fig. 6 does not constitute a limitation of the control device and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 6, the memory 1005, which is a storage medium, may include therein an operating system, a data storage module, a bluetooth communication module, a user interface module, and a projection apparatus control program.
In the control apparatus shown in fig. 6, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 in the control apparatus of the present invention may be provided in the control apparatus, and the control apparatus calls the projection device control program stored in the memory 1005 through the processor 1001 and executes the projection device control method provided in the embodiment of the present application.
In addition, an embodiment of the present invention further provides a computer storage medium, in which a projection apparatus control program is stored, and the projection apparatus control program implements the steps of the projection apparatus control method as above when executed by a processor. Therefore, a detailed description thereof will be omitted. In addition, the beneficial effects of the same method are not described in detail. For technical details not disclosed in embodiments of the computer-readable storage medium referred to in the present application, reference is made to the description of embodiments of the method of the present application. It is determined that, by way of example, the program instructions may be deployed to be executed on one computing device or on multiple computing devices at one site or distributed across multiple sites and interconnected by a communication network.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (11)
1. A projection device, comprising:
an imaging unit for providing an image-bearing light beam propagating along a projection light path;
the first prism and the second prism are provided with a beam splitting surface connected with each other;
the light splitting film is arranged on the light splitting surface;
when the image bearing light beam is emitted from the first prism to the light splitting surface, part of the light beam of the image bearing light beam is reflected by the light splitting surface and then emitted from the first prism to the first projection surface to form a first projection image, the rest of the light beam of the image bearing light beam is emitted from the light splitting film to the second prism, and the rest of the light beam is emitted from the second prism to the second projection surface to form a second projection image.
2. The projection device of claim 1, wherein the first prism further comprises a first total reflection surface and a second total reflection surface;
the partial light beams are reflected to the first total reflection surface by the light splitting surface, the partial light beams are reflected to the second total reflection surface by the first total reflection surface, and the partial light beams are reflected by the second total reflection surface and then emitted to the first projection surface from the first prism to form a first projection image.
3. The projection apparatus according to claim 2, wherein the second total reflection surface is a concave surface or a convex surface, and the second total reflection surface is a spherical surface, an aspherical surface or a free-form surface.
4. The projection apparatus of claim 3, wherein the first prism has a first light incident surface, and the image-bearing light beam enters the first prism through the first light incident surface;
an included angle between the first light incident surface and the first total reflection surface is a; wherein a is more than or equal to 110 degrees and less than or equal to 130 degrees.
5. The projection device of claim 4, wherein the included angle between the second total reflection surface and the first projection surface is b, and the radius of curvature of any point of the second total reflection surface is Ri, b is more than or equal to 40 degrees and less than or equal to 50 degrees, and Ri is more than or equal to 25mm and less than or equal to 60 mm.
6. The projection device of claim 1, wherein the second prism further comprises a third reflective surface;
the remaining light beams are transmitted into the second prism from the light splitting surface, reflected by the third reflecting surface and then emitted from the second prism to the second projection surface to form a second projection image.
7. The projection apparatus of claim 6, wherein the third reflective surface is concave or convex, and the third reflective surface is spherical, aspherical, or free-form.
8. The projection device of claim 7, wherein the angle between the first light incident surface and the splitting surface is c, the angle between the third reflecting surface and the second projection surface is d, and the radius of curvature of any point of the third reflecting surface is Rj, wherein c is greater than or equal to 30 degrees and less than or equal to 50 degrees, d is greater than or equal to 20 degrees and less than or equal to 30 degrees, and Rj is greater than or equal to 40mm and less than or equal to 120 mm.
9. The projection apparatus according to any one of claims 1 to 8, wherein the spectroscopic film is detachably attached to the spectroscopic surface;
the projection apparatus further includes:
a total reflection film;
a fully transmissive film; and
the film layer switching assembly is connected with the total reflection film, the total transmission film and the light splitting film and has a first state, a second state and a third state, the film layer switching assembly is connected with the light splitting surface and the total reflection film in the first state, the film layer switching assembly is connected with the light splitting surface and the total transmission film in the second state, and the film layer switching assembly is connected with the light splitting surface and the light splitting film in the third state.
10. A control method for a projection apparatus according to claim 8, wherein the method comprises:
receiving an operation instruction of a user for selecting a target projection screen; the target projection screen comprises at least one of a first projection surface and a second projection surface;
determining a target working state of the film layer switching assembly based on the operation instruction;
controlling the film layer switching assembly to switch to a target working state;
and after the film layer switching assembly is switched to the target working state, controlling the imaging unit to emit light.
11. A projection system, comprising:
the projection device of claim 8; and
a control apparatus comprising a memory, a processor, and a projection device control program stored on the memory and executable on the processor, the projection device control program configured to implement the steps of the projection device control method of claim 9.
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| CN202111290968.9A CN114077143B (en) | 2021-10-29 | 2021-10-29 | Projection device, control method of projection device and projection system |
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Cited By (1)
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|---|---|---|---|---|
| CN117492192A (en) * | 2023-12-04 | 2024-02-02 | 宜宾市极米光电有限公司 | Projection lens |
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