Projection system and projection method

Abstract

The invention discloses a projection system and a projection method. The projection system comprises a projector, a projection screen and a 3D display model, the projector comprises a projection lens and a processor; the projection screen has an unfolded state and a rolled state, shields the 3D display model in the unfolded state, and exposes the 3D display model in the rolled state; wherein the processor is used for determining the state of the projection screen and calling a planar projection mode when the projection screen is in an unfolded state, so that the projection lens emits projection light to the projection screen to form a planar projection picture; and calling a 3D projection mode when the projection screen is in a rolling state, so that the projection lens emits projection light to the exposed 3D display model to form a 3D projection picture. According to the application, the traditional flat panel display requirement is met, and the stereoscopic projection effect can be realized by utilizing the 3D display model. Meanwhile, after the projection screen is rolled up, the 3D display model can exist as a space decoration element, so that the projection area has functionality and decoration.

Description

Technical Field

[0001] The present application relates to the field of projection technology, and more specifically to a projection system and a projection method. Background Art

[0002] With the rapid development of display devices, the use of traditional TVs in home entertainment scenarios has gradually decreased. Compared with traditional TVs, projectors have become an alternative choice for many users due to their portability, large screen display, and space saving advantages.

[0003] However, most of the projection equipment on the market are still mainly based on flat-panel display, which only replaces the traditional flat-panel TV display mode and fails to give full play to the technical advantages of projectors in stereoscopic display. Summary of the Invention

[0004] The Summary of the Invention introduces a series of simplified concepts that will be further described in the Detailed Description of the Invention. The Summary of the Invention is not intended to limit the key features and essential features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] On one hand, the present application provides a projection system, which includes a projector, a projection screen, and a 3D display model; The projector includes a projection lens and a processor; The projection screen has an unfolded state and a retracted state, and in the unfolded state, the projection screen blocks the 3D display model, and in the retracted state, the projection screen exposes the 3D display model; The processor is used to determine the state of the projection screen, and call the plane projection mode when the projection screen is in the unfolded state, so that the projection lens emits projection light to the projection screen to form a plane projection picture; and call the 3D projection mode when the projection screen is in the rolled-up state, so that the projection lens emits projection light to the exposed 3D display model to form a 3D projection picture.

[0006] In one example, the projection screen and the 3D display model are both installed in a projection display area; The projector further includes a first image acquisition element, which is used to acquire first image information of the projection display area; The processor is configured to perform image recognition on the first image information, and determine whether the projection screen is in an unfolded state or a rolled-up state according to an image recognition result.

[0007] In one example, The first image acquisition element is further configured to acquire second image information of the 3D display model in the 3D projection mode; The projector further includes a storage element electrically connected to the processor, wherein the storage element stores preset 3D display model information and a 3D display screen template associated with the preset 3D display model information; and / or, the preset 3D display model information and the 3D display screen template associated with the preset 3D display model information are stored in a cloud that is communicatively connected to the processor; The second image information includes captured size information of the 3D display model, and the preset 3D display model information includes preset size information of the 3D display model; and / or a code mark is provided on the 3D display model, the second image information includes captured image information of the code mark, and the preset 3D display model information includes preset mark information of the code mark on the 3D display model; When the collected second image information includes image information of the code mark, the processor is configured to: matching the second image information with the 3D display model information, and when the second image information and the 3D display model information match, calling the 3D display screen template from the storage element or the cloud, and causing the projection lens to emit projection light toward the exposed 3D display model to form a 3D projection screen based on the 3D display screen template; Alternatively, when the acquired second image information includes acquisition size information of the 3D display model, the processor is configured to: A 3D display screen template modeled according to the second image information is acquired, and based on the 3D display screen template, the projection lens is caused to emit projection light toward the exposed 3D display model to form a 3D projection screen.

[0008] In one example, the processor is further configured to: When the projection lens emits projection light toward the exposed 3D display model to form a 3D projection image based on the 3D display image template, the 3D projection image is subjected to distortion correction based on the distortion correction parameters so that the formed 3D projection image matches the 3D display model, wherein the distortion correction parameters are preset in the storage element, or the distortion correction parameters are generated in real time by the processor.

[0009] In one example, the first image acquisition element includes a wide-angle lens.

[0010] In one example, the projection lens is a zoom lens, and the processor is further configured to: The zoom ratio of the zoom lens is adjusted according to the second image information so that the size of the formed 3D projection image matches the size of the 3D display model.

[0011] In one example, the projection system further includes an electric reeling mechanism, and the electric reeling mechanism is used to control the projection screen to be in an unfolded state or a reeled state; The processor is electrically connected to the electric winding mechanism, and the processor is used to: An electrical signal from the electric reeling mechanism is received, and a state of the projection screen is determined according to the electrical signal.

[0012] In one example, the processor determines the state of the projection screen according to the electrical signal, including: When the electrical signal has a first signal value, the processor determines that the projection screen is in an unfolded state; When the electrical signal has a second signal value, the processor determines that the projection screen is in a rolled-up state.

[0013] In one example, the projection system also includes a remote control device, which is used to issue remote control instructions to the projector. The projector includes a remote control receiving element for receiving the remote control instructions. The remote control receiving element is electrically connected to the processor, and the processor is used to call the plane projection mode or the 3D projection mode according to the remote control instructions received by the remote control receiving element.

[0014] In one example, the projection system further includes an outdoor information acquisition device, the outdoor information acquisition device including an access control device and a second image acquisition element, the access control device and the second image acquisition element are electrically connected, and the second image acquisition element is communicatively connected to the processor; The access control device is used to generate a trigger signal in response to an access instruction from a user; The second image acquisition element is used to respond to the trigger signal, and collect outdoor environment information according to the trigger signal and send it to the processor; The processor is used to receive the outdoor environment information and call the plane projection mode to project the outdoor environment information onto the projection screen.

[0015] In one example, the access control device includes a doorbell device or a visitor system.

[0016] In one example, the size of the 3D display model is smaller than or equal to the size of the projection screen.

[0017] Another aspect of the present application provides a projection method, which is applied to a projection system, wherein the projection system includes a projector, a projection screen, and a 3D display model, and the projection method includes: Determining a state of the projection screen; wherein the projection screen has an unfolded state and a retracted state, and in the unfolded state the 3D display model is obscured, and in the retracted state the 3D display model is exposed; When the projection screen is in the unfolded state, the plane projection mode is called so that the projection lens of the projector emits projection light toward the projection screen to form a plane projection picture; when the projection screen is in the rolled-up state, the 3D projection mode is called so that the projection lens emits projection light toward the exposed 3D display model to form a 3D projection picture.

[0018] In one example, the projection screen and the 3D display model are both installed in a projection display area, and determining the state of the projection screen includes: Image recognition is performed on the first image information of the projection display area captured by the first image capturing element of the projector, and it is determined whether the projection screen is in an unfolded state or a rolled-up state according to the image recognition result.

[0019] In one example, the projection method further includes acquiring second image information of the 3D display model in the 3D projection mode; The storage element of the projector stores preset 3D display model information and a 3D display screen template associated with the preset 3D display model information; and / or the preset 3D display model information and the 3D display screen template associated with the preset 3D display model information are stored in a cloud that is communicatively connected to the projector; The second image information includes captured size information of the 3D display model, and the preset 3D display model information includes preset size information of the 3D display model; and / or a code mark is provided on the 3D display model, the second image information includes captured image information of the code mark, and the preset 3D display model information includes preset mark information of the code mark on the 3D display model; When the collected second image information includes image information of the code mark, the projection method further includes: matching the second image information with the 3D display model information, and when the second image information and the 3D display model information match, calling the 3D display screen template from the storage element or the cloud, and causing the projection lens to emit projection light toward the exposed 3D display model to form a 3D projection screen based on the 3D display screen template; Alternatively, when the collected second image information includes collected size information of the 3D display model, the projection method further includes: A 3D display screen template modeled according to the second image information is acquired, and based on the 3D display screen template, the projection lens is caused to emit projection light toward the exposed 3D display model to form a 3D projection screen.

[0020] In one example, the projection method further includes: When the projection lens emits projection light toward the exposed 3D display model to form a 3D projection image based on the 3D display image template, the 3D projection image is subjected to distortion correction based on the distortion correction parameters so that the formed 3D projection image matches the 3D display model.

[0021] In one example, the first image acquisition element includes a wide-angle lens.

[0022] In one example, the projection lens is a zoom lens, and the projection method further includes: The zoom ratio of the zoom lens is adjusted according to the second image information so that the size of the formed 3D projection image matches the size of the 3D display model.

[0023] In one example, the projection system further includes an electric reeling mechanism, the electric reeling mechanism being used to control the projection screen to be in an unfolded state or a reeled state, and the projection method further includes: The state of the projection screen is determined based on the electrical signal.

[0024] In one example, determining the state of the projection screen according to the electrical signal includes: When the electrical signal has a first signal value, determining that the projection screen is in an unfolded state; When the electrical signal has a second signal value, it is determined that the projection screen is in a rolled-up state.

[0025] In one example, the projection system further includes a remote control device, the remote control device being configured to issue remote control instructions to the projector, and the projection method further includes: The plane projection mode or the 3D projection mode is called according to the remote control instruction.

[0026] In one example, the projection system further includes an outdoor information acquisition device, the outdoor information acquisition device including an access control device and a second image acquisition element, the access control device and the second image acquisition element being electrically connected; The access control device is used to generate a trigger signal in response to an access instruction from a user; The second image acquisition element is used to respond to the trigger signal and acquire outdoor environment information according to the trigger signal; The projection method further comprises: The plane projection mode is called to project the outdoor environment information onto the projection screen.

[0027] In one example, the access control device includes a doorbell device or a visitor system.

[0028] In one example, the size of the 3D display model is smaller than or equal to the size of the projection screen.

[0029] According to the projection system and projection method of the embodiments of the present application, by providing a retractable flat screen and a 3D display model, the projection system can automatically switch between flat and 3D projection modes depending on the state of the projection screen. This not only meets the needs of traditional flat-screen displays, but also utilizes the 3D display model to achieve a stereoscopic projection effect, thereby enhancing the display diversity of the projection system and providing users with a diverse visual experience. Furthermore, when the projection screen is retracted, the 3D display model can serve as a decorative element in the space, naturally blending in with the interior environment. This effectively addresses the lack of aesthetics in traditional projection equipment when not in use, making the projection area both functional and decorative. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0031] In the attached figure: Figure 1 A schematic structural diagram of a projection device according to an embodiment of the present application is shown; Figure 2 A schematic structural diagram of a projection device according to another embodiment of the present application is shown; Figure 3 A flowchart of a projection method according to an embodiment of the present application is shown; Figure 4 A flowchart of a projection method according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0032] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present application. However, it will be apparent to those skilled in the art that the present application can be implemented without one or more of these details. In other examples, some technical features well known in the art are not described in order to avoid confusion with the present application.

[0033] It should be understood that the present application can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to make the disclosure thorough and complete and to fully convey the scope of the present application to those skilled in the art. In the drawings, the dimensions and relative sizes of layers and regions may be exaggerated for clarity. Like reference numerals throughout represent like elements.

[0034] It should be understood that when an element or layer is referred to as being "on," "adjacent to," "connected to," or "coupled to" another element or layer, it can be directly on, adjacent to, connected to, or coupled to the other element or layer, or there can be intervening elements or layers. Conversely, when an element is referred to as being "directly on," "directly adjacent to," "directly connected to," or "directly coupled to" another element or layer, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers, and / or parts, these elements, components, regions, layers, and / or parts should not be limited by these terms. These terms are merely used to distinguish one element, component, region, layer, or part from another element, component, region, layer, or part. Therefore, without departing from the teachings of the present application, a first element, component, region, layer, or part discussed below may be represented as a second element, component, region, layer, or part.

[0035] Spatially relative terms such as "under," "beneath," "below," "under," "above," "above," etc., may be used herein for convenience of description to describe the relationship of one element or feature shown in the figures to other elements or features. It should be understood that the spatially relative terms are intended to include different orientations of the device in use and operation in addition to the orientations shown in the figures. For example, if the device in the drawings is flipped, then the elements or features described as "under" or "beneath" or "beneath" the other elements will be oriented as "over" the other elements or features. Thus, the exemplary terms "under" and "under" may include both the upper and lower orientations. The device may be oriented otherwise (rotated 90 degrees or in other orientations) and the spatial descriptors used herein are interpreted accordingly.

[0036] The purpose of the terms used herein is only to describe specific embodiments and is not intended to limit the present application. When used herein, the singular forms "a", "an", and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "comprising" and / or "including", when used in this specification, determine the presence of the features, integers, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, operations, elements, parts and / or groups. When used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0037] Existing projection systems typically use a rollable flat projection screen as a display medium, projecting flat images onto the screen through a projector to display information. While this solves the issues of equipment size and space occupation to a certain extent, significant technical bottlenecks still exist: Single display mode: Existing projection systems can only achieve flat two-dimensional display, which is completely equivalent to the display logic of traditional flat-panel TVs. They cannot provide three-dimensional display effects, wasting the projector's advantage in flexibility in display form.

[0038] Insufficient spatial aesthetics: Although a retractable screen design is adopted, the idle space in the projection display area is not effectively utilized after the screen is rolled up, and the problem of coordination between the projection system and the environmental aesthetics is not fundamentally solved.

[0039] Lack of environmental interaction: Existing projection systems lack the ability to perceive the outdoor environment in real time and fail to effectively combine the display capabilities of the projection system with outdoor environment perception.

[0040] In order to solve at least one of the above technical problems, the present application provides a projection system, which includes a projector, a projection screen and a 3D display model; the projector includes a projection lens and a processor; the projection screen has an unfolded state and a retracted state, and blocks the 3D display model in the unfolded state and exposes the 3D display model in the retracted state; wherein the processor is used to determine the state of the projection screen, and call a plane projection mode when the projection screen is in the unfolded state, so that the projection lens emits projection light to the projection screen to form a plane projection picture; and call a 3D projection mode when the projection screen is in the retracted state, so that the projection lens emits projection light to the exposed 3D display model to form a 3D projection picture.

[0041] The projection system of this application, by providing a retractable flat screen and a 3D display model, automatically switches between flat and 3D projection modes depending on the state of the projection screen. This not only meets the needs of traditional flat-screen displays, but also utilizes the 3D display model to achieve a stereoscopic projection effect, thereby enhancing the display diversity of the projection system and providing users with a diverse visual experience. Furthermore, when the projection screen is retracted, the 3D display model can serve as a decorative element in the space, blending naturally with the interior environment. This effectively addresses the lack of aesthetics in traditional projection equipment when not in use, making the projection area both functional and decorative.

[0042] In order to fully understand the present application, a detailed structure will be provided in the following description to illustrate the technical solution proposed in the present application. The preferred embodiments of the present application are described in detail below. However, in addition to these detailed descriptions, the present application may also have other implementation methods. Example 1

[0043] Reference below Figure 1 and Figure 2 A projection system according to one embodiment of the present application is described. The projection system includes a projector, a projection screen, and a 3D display model; the projector includes a projection lens and a processor; the projection screen has an unfolded state and a retracted state, and obscures the 3D display model in the unfolded state and exposes the 3D display model in the retracted state; the processor is configured to determine the state of the projection screen and, when the projection screen is in the unfolded state, invoke a planar projection mode so that the projection lens emits projection light toward the projection screen to form a planar projection image; and, when the projection screen is in the retracted state, invoke a 3D projection mode so that the projection lens emits projection light toward the exposed 3D display model to form a 3D projection image.

[0044] On the one hand, the projection system of this embodiment can automatically switch display modes based on the status of the projection screen through the processor. When the processor determines that the projection screen is in the extended state, it activates the flat projection mode, projecting light onto the projection screen through the projection lens, forming a high-definition flat projection image that can be used for daily entertainment activities such as watching movies and playing videos. When the processor determines that the projection screen is in the retracted state, the exposed 3D display model serves as a stereo projection carrier, supporting 3D projection mode and presenting a three-dimensional image with a sense of spatial layering. This design breaks through the limitations of a single flat display, meeting the needs of traditional flat display while utilizing the 3D display model to achieve a stereoscopic projection effect, fully leveraging the projector's technical advantages in 3D imaging to provide users with a diversified visual experience. It is particularly suitable for scenarios requiring immersive and three-dimensional display.

[0045] On the other hand, when the projection screen is rolled up, the 3D display model is directly exposed in the projection display area. This 3D display model can be pre-designed as a three-dimensional structure that matches the interior decoration style (such as an artistic sculpture or geometric shape). Projection light is projected onto the surface of the 3D display model to form a 3D image, seamlessly integrating the 3D display model with the surrounding decoration. This design eliminates the problem of traditional screens "making the projection display area unsightly when rolled up and idle." Regardless of the projection screen's state, the projection display area can exist in an aesthetically pleasing and practical form—serving as both a functional display device and a decorative element, fundamentally enhancing the aesthetic value and user experience of the space.

[0046] In some embodiments, the size of the 3D display model is smaller than or equal to the size of the projection screen to ensure that the projection screen can completely cover the 3D display model when in the unfolded state.

[0047] Specifically, the length, width, and height dimensions of the 3D display model are precisely designed, and do not exceed the corresponding side lengths of the projection screen in either the horizontal or vertical directions. Whether it is a 3D display model with regular geometric shapes (such as cube models, cylindrical models, etc.) or an irregular 3D display model (such as artistic models, etc.), its outer contour boundary is always controlled within the effective display area of ​​the projection screen. When the projection screen is in the unfolded state, when viewed from the projector's projection angle, the 3D display model is completely covered by the projection screen, preventing its structural features from interfering with the flat projection image, ensuring that users receive a complete and pure 2D visual experience. When the projection screen is rolled up, the 3D display model is fully exposed, providing an adaptive stereoscopic projection carrier for the 3D projection mode. This size-matching design enables seamless switching between the two projection modes without mutual interference.

[0048] In some embodiments, both the projection screen and the 3D display model are mounted in the projection display area. The projection screen and the 3D display model can be mounted in the projection display area in a front-to-back stacked arrangement using a first mounting portion and a second mounting portion, respectively. The first mounting portion can utilize embedded rails, hanging brackets, or other structures to support either concealed or non-concealed installation of the projection screen on a wall, within a wall, or within a ceiling or suspended ceiling. For example, a wall-embedded installation utilizes a pre-reserved adaption groove to ensure the screen is flush with the wall when unfolded. A sandwich installation within the wall completely conceals the structure, while a ceiling-mounted design allows the screen to be stored within the suspended ceiling after use. The second mounting portion, used to secure the 3D display model, utilizes an adjustable frame or magnetic base, allowing for flexible adaptation based on the model's size and weight. For smaller, lighter 3D display models, a bracket-type mounting mechanism can be used to secure the 3D display model in a suitable position behind the projection screen. For larger 3D display models, the second mounting portion utilizes a frame-type structure to provide a secure connection to the building wall, ensuring the stability of the 3D display model during projection and allowing it to blend seamlessly into the surrounding environment when the projection screen is rolled up. The two installation parts are designed in collaboration to ensure that the projection screen completely blocks the 3D display model when unfolded and fully exposes the model when rolled up, providing hardware support for seamless switching between flat / 3D projection modes.

[0049] like Figure 1 As shown, the projector also includes a first image acquisition element, which is used to acquire first image information of the projection display area. The first image acquisition element can be a camera, and its parameters such as resolution and frame rate can be set according to actual needs, and there is no limitation on this. For example, the first image acquisition element can be a wide-angle lens. The first image acquisition element can be integrated on the projector. In a specific implementation, the camera can be installed at the front end of the projector, with the lens facing the projection display area to ensure that the image of the projection display area can be fully captured. This integrated design enables the camera to acquire image information of the projection screen and the area where the 3D display model is located in real time, while avoiding the need for additional installation space and simplifying the system structure. In addition, the camera is directly connected to the processor inside the projector, and can quickly transmit the acquired image data to the processor for analysis and processing, providing data support for accurate judgment of the status of the projection screen.

[0050] The processor is used to determine the state of the projection screen based on the first image information. It performs image recognition on the first image information through an image processing algorithm, and determines whether the projection screen is in an unfolded state or a retracted state based on the image recognition result. The image processing algorithm can adopt a traditional computer vision algorithm or a deep learning algorithm, etc., and is not limited to this. For example, the processor first pre-processes the first image information, including grayscale, noise reduction and other operations to improve the image quality. Then, the outline of the projection screen is identified through an edge detection algorithm. If the complete screen edge outline is detected and its coverage area reaches a preset threshold, the projection screen is determined to be in an unfolded state; conversely, if the screen edge outline is incomplete and at least part of the structural features of the rear 3D display model can be clearly identified, the projection screen is determined to be in a retracted state.

[0051] In other embodiments, the projection system further includes an electric reeling mechanism, which is used to control the projection screen to be in an unfolded state or a reeled state. For example, the electric reeling mechanism may include a motor, a transmission component, and a limit device. The motor is a core driving component, and a servo motor or a stepper motor may be selected, without limitation. The motor is connected to the projection screen through transmission components such as gears and belts, and accurately drives the projection screen to be stably retracted and extended. The limit device is composed of sensors installed at both ends of the guide rail. The sensor type may be a photoelectric sensor, a Hall sensor, etc., without limitation. When the screen moves to the extreme position, the sensor triggers a signal, and the motor stops running immediately to prevent the projection screen from being overly retracted and extended.

[0052] The processor is electrically connected to the electric reeling mechanism and is configured to receive electrical signals from the electric reeling mechanism and determine the state of the projection screen based on the electrical signals. Specifically, when the electric reeling mechanism drives the projection screen to unfold or retract, it generates electrical signals representing the operating state, such as current changes and pulse signals. The processor analyzes these electrical signals to determine whether the projection screen is in the unfolded or retracted state, and then switches between planar projection mode and 3D projection mode based on the state.

[0053] For example, the processor determines the state of the projection screen based on the electrical signal, including: when the electrical signal has a first signal value, the processor determines that the projection screen is in the extended state; when the electrical signal has a second signal value, the processor determines that the projection screen is in the retracted state. The signal value setting method and value range can be adjusted according to actual circuit requirements and are not limited thereto.

[0054] For example, when the electric retracting mechanism drives the projection screen to unfold, its electrical signal is 1. Upon receiving the electrical signal with a signal value of 1, the processor can determine that the projection screen is unfolded. When the electric retracting mechanism drives the projection screen to retract, its electrical signal is 0. Upon receiving the electrical signal with a signal value of 0, the processor can determine that the projection screen is retracted. In actual applications, the specific values ​​and corresponding relationships of the signal values ​​are merely examples and can be variously set according to system design requirements, and are not limited to this.

[0055] In some embodiments, the first image capture element is further configured to capture second image information of the 3D display model in 3D projection mode. Specifically, when the projection screen is rolled up and the projection system is switched to 3D projection mode, the first image capture element captures an image of the 3D display model. The capture process can automatically adjust parameters such as exposure and focus based on ambient lighting conditions to ensure clear and complete second image information.

[0056] like Figure 1 As shown, the projector also includes a storage element electrically connected to the processor. The storage element can be a high-speed flash memory chip or a solid-state drive, etc., without limitation. It has a large data storage capacity and enables rapid data exchange with the processor via a high-speed data bus, ensuring low latency and high stability during data retrieval and storage.

[0057] The storage element stores preset 3D display model information and a 3D display screen template associated with the preset 3D display model information. The second image information captured by the first image capture element may include captured size information of the 3D display model, and accordingly, the preset 3D display model information may include preset size information of the 3D display model. Alternatively, if a code mark is provided on the 3D display model, the second image information captured by the first image capture element includes captured image information of the code mark, and the preset 3D display model information includes preset mark information of the code mark on the 3D display model.

[0058] Alternatively, the preset 3D display model information and the 3D display screen template associated with the preset 3D display model information may also be stored in a cloud that is communicatively connected to the processor, which is not limited thereto.

[0059] When the collected second image information includes image information of a code mark, the processor is used to: match the second image information with the 3D display model information, and when the second image information and the 3D display model information match, call the 3D display screen template from the storage element or the cloud, and based on the 3D display screen template, cause the projection lens to emit projection light toward the exposed 3D display model to form a 3D projection screen. During the matching process, the processor compares the code mark in the second image information with the preset mark information. The code mark set on the 3D display model can be in the form of a QR code, AR mark, etc. The encoding rules and recognition algorithm of the mark can be customized according to system requirements and are not limited to this. By identifying the code mark, the processor can quickly index to the corresponding 3D display screen template to achieve accurate matching between the 3D display model and the 3D display screen template. Afterwards, the processor calls the 3D display screen template, converts the 3D display screen template into a projection signal, and controls the projection lens to emit projection light toward the exposed 3D display model according to the projection signal to form a 3D projection screen.

[0060] It should be noted that in the case described above where multiple 3D display screen templates are stored in the storage element or cloud, the first image acquisition element captures the second image information of the 3D display model to match the appropriate 3D display screen template. The processor then calls the matching 3D display screen template to cause the projection lens to emit projection light toward the exposed 3D display model to form a 3D projection screen. If only one 3D display screen template is stored in the storage element or cloud, the first image acquisition element is not required to capture the second image information of the 3D display model. In 3D projection mode, the processor can directly call the 3D display screen template and, based on the 3D display screen template, cause the projection lens to emit projection light toward the exposed 3D display model to form a 3D projection screen.

[0061] In other embodiments, the storage element or the cloud may not store the 3D display screen template. When the first image acquisition element acquires second image information of the 3D display model in 3D projection mode, and the acquired second image information includes acquisition size information of the 3D display model, the processor is configured to: obtain a 3D display screen template modeled based on the second image information, and based on the 3D display screen template, cause the projection lens to emit projection light toward the exposed 3D display model to form a 3D projection screen. The second image information can be uploaded to the cloud, and a 3D modeling process performed in the cloud to obtain the 3D display screen template, or the 3D modeling process can be performed locally to obtain the 3D display screen template. For example, the cloud or the processor can process the second image information using a real-time modeling algorithm. The algorithm can adopt feature point-based modeling, monocular depth modeling, deep learning-based modeling, etc., without limitation. A 3D display screen template that matches the actual model is generated based on the acquired acquisition size information of the 3D display model, and based on the 3D display screen template, the projection lens can emit projection light toward the exposed 3D display model to form a 3D projection screen.

[0062] In some embodiments, the storage element also presets distortion correction parameters. The types of distortion correction parameters may include geometric distortion coefficients, chromatic aberration compensation data, etc. The specific content can be customized according to the characteristics of the projection lens and the shape of the 3D display model, and is not limited to this.

[0063] The processor is also used for: when the projection lens emits projection light to the exposed 3D display model based on the 3D display screen template or the 3D display screen template to form a 3D projection screen, based on the distortion correction parameters, the 3D projection screen is subjected to distortion correction so that the formed 3D projection screen matches the 3D display model. By calling the distortion correction parameters for processing, the deformation of the screen can be effectively corrected so that the formed 3D projection screen matches the 3D display model, ensuring that the projection screen completely and accurately covers the surface of the 3D display model, presenting a clear, non-distorted stereoscopic visual effect. Of course, the distortion correction parameters can also be generated by the processor in real time, which is not limited to this. For example, the processor can generate corresponding distortion correction parameters in real time based on the second image information and the 3D display screen template.

[0064] It is worth noting that the preset 3D display model information, 3D display screen template and distortion correction parameters can be stored in the same storage element or in different storage elements.

[0065] In some embodiments, the projection lens is a zoom lens. For example, it can be a motorized zoom lens, which automatically adjusts the focal length through a motorized mechanism. Other lens types with zoom capabilities can also be used, and this is not limited to this. The motorized mechanism can be driven by a stepper motor or a servo motor, and the specific type is selected based on actual needs and is not limited to this.

[0066] The processor is further configured to adjust the zoom ratio of the zoom lens based on the second image information so that the size of the resulting 3D projection image matches the size of the 3D display model. For example, if the second image information includes the acquired size information of the 3D display model, the processor calculates the difference between the current model and the ideal projection size based on the acquired size information of the 3D display model and converts this difference into a control signal. Using this control signal, the processor drives the electric mechanism of the zoom lens to adjust the position of the internal lens group, precisely changing the zoom ratio of the lens so that the projection range of the projection light accurately matches the size of the 3D display model, ensuring that the projection image completely covers the surface of the model without image overflow or incomplete projection, thereby presenting a clear and complete 3D projection effect.

[0067] like Figure 2 As shown, in some embodiments, the projection system further includes a remote control device for issuing remote control commands to the projector. The remote control device can be implemented as an infrared remote control, a Bluetooth remote control, or a Wi-Fi remote control, without limitation. For example, an infrared remote control transmits commands by emitting specifically coded infrared signals; a Bluetooth remote control utilizes low-power Bluetooth technology to establish a wireless connection with the projector and transmit command signals. The specific method used can be flexibly selected based on actual needs.

[0068] like Figure 2 As shown, the projector includes a remote control receiving element for receiving remote control commands, and the remote control receiving element is electrically connected to the processor. The type of remote control receiving element matches the transmission method of the remote control device, for example, an infrared remote control corresponds to an infrared receiving head, and a Bluetooth remote control corresponds to a Bluetooth receiving element. The installation location of the remote control receiving element can be optimized according to the structural design of the projector and is not limited to this.

[0069] The processor is used to call the flat projection mode or 3D projection mode according to the remote control command received by the remote control receiving element. The user can send commands through the preset function buttons on the remote control device (such as the "2D mode button" and the "3D mode button"). After receiving the command, the processor parses the command content and performs the corresponding operation. When the flat projection mode command is received, the processor controls the projection screen to unfold through the electric reeling mechanism and controls the projection lens to project a flat image onto the projection screen; when the 3D projection mode command is received, the processor controls the projection screen to retract through the electric reeling mechanism, calls the projection image that matches the 3D display model, and controls the projection lens to project a three-dimensional image onto the 3D display model. The operation method and command definition can be adjusted according to user needs and are not limited to this.

[0070] In some embodiments, as Figure 2 As shown, the projection system also includes an outdoor information acquisition device, which includes an access control device and a second image acquisition element. The access control device can take the form of a doorbell, visitor system, password lock, fingerprint lock, facial recognition access control, and other devices, without limitation. The second image acquisition element can be a high-definition camera, a panoramic camera, or other devices. Parameters such as resolution and viewing angle can be set according to actual needs and are not limited to this. The access control device and the second image acquisition element are electrically connected to enable interactive signal transmission. The second image acquisition element communicates with the processor via wired or wireless communication. The communication protocol can be flexibly selected based on the system design and is not limited to this.

[0071] Access control devices are designed to generate trigger signals in response to user access commands. Access commands can be input in a variety of ways, such as by ringing the doorbell, entering a password, scanning a fingerprint, or performing facial recognition. The device's internal sensing module and control circuitry verify the input information and, upon successful verification, generate a specifically coded trigger signal. The signal encoding rules can be customized based on system security requirements and are not specified.

[0072] The second image acquisition component is configured to respond to a trigger signal and, based on the trigger signal, collect information about the outdoor environment and transmit it to the processor. Upon receiving the trigger signal from the access control device, the second image acquisition component automatically activates and captures the outdoor scene at a preset frame rate and resolution. The captured information includes, but is not limited to, images and dynamic video. The acquisition parameters can be automatically adjusted based on lighting conditions, though this is not a specific requirement. After acquisition is complete, the second image acquisition component encodes and compresses the outdoor environment information and transmits it to the processor via a communication link.

[0073] The processor is used to receive outdoor environmental information and invoke the plane projection mode to project the outdoor environmental information onto the projection screen. The processor decodes and interprets the received outdoor environmental information, controls the unfolding of the projection screen via a motorized retracting mechanism (if the projection screen is already unfolded, no further unfolding is required). The processor then converts the outdoor environmental information into a projection signal, controlling the projection lens to project a clear image onto the projection screen, allowing indoor users to intuitively view outdoor conditions. Parameters such as the display quality and aspect ratio can be adjusted based on screen size and user needs, and there are no specific restrictions on this.

[0074] Through the above-mentioned structural design, the projection system of this embodiment breaks through the limitation of traditional projection equipment that only serves as a display terminal. In the prior art, the projection system is usually independent of the building security or environmental monitoring system and cannot present outdoor dynamic information in real time. However, this solution links the outdoor information collection device with the projection screen. When a visitor triggers the access control device, the processor immediately calls the plane projection mode to synchronously display the outdoor image on the indoor projection screen, realizing the innovative application of "real-time projection of outdoor scenes". For example, users can visually confirm the visitor's identity or observe the outdoor environment conditions on the projection screen without approaching doors and windows or checking their mobile phones. This significantly improves the functional scalability of the projection system and the convenience of user experience, and effectively solves the technical problem of the separation of display capabilities and environmental perception in the prior art. Example 2

[0075] The present application also provides a projection method. The projection method is applied to a projection system, which includes a projector, a projection screen and a 3D display model, such as Figure 3 As shown, the projection methods include: Step S1, determining the state of the projection screen; wherein the projection screen has an unfolded state and a retracted state, and in the unfolded state, the 3D display model is obscured, and in the retracted state, the 3D display model is exposed; Step S2, when the projection screen is in the unfolded state, the plane projection mode is called, so that the projection lens of the projector emits projection light to the projection screen to form a plane projection picture; when the projection screen is in the rolled-up state, the 3D projection mode is called, so that the projection lens emits projection light to the exposed 3D display model to form a 3D projection picture.

[0076] On the one hand, the projection system of this embodiment can automatically switch display modes based on the status of the projection screen. When the projection screen is determined to be in the extended state, the flat projection mode is activated, and projection light is projected onto the projection screen through the projection lens, forming a high-definition flat projection image that can be used for daily entertainment activities such as watching movies and playing videos. When the projection screen is determined to be in the retracted state, the exposed 3D display model serves as a stereo projection carrier, supporting 3D projection mode, and can present a three-dimensional image with a sense of spatial layering. This design breaks through the limitations of a single flat display, meeting the needs of traditional flat display while utilizing the 3D display model to achieve a stereoscopic projection effect, fully leveraging the projector's technical advantages in 3D imaging, providing users with a diversified visual experience. It is particularly suitable for scenarios requiring immersive and three-dimensional display.

[0077] On the other hand, when the projection screen is rolled up, the 3D display model is directly exposed in the projection display area. This 3D display model can be pre-designed as a three-dimensional structure that matches the interior decoration style (such as an artistic sculpture or geometric shape). Projection light is projected onto the surface of the 3D display model to form a 3D image, seamlessly integrating the 3D display model with the surrounding decoration. This design eliminates the problem of traditional screens "making the projection display area unsightly when rolled up and idle." Regardless of the projection screen's state, the projection display area can exist in an aesthetically pleasing and practical form—serving as both a functional display device and a decorative element, fundamentally enhancing the aesthetic value and user experience of the space.

[0078] In some embodiments, the size of the 3D display model is smaller than or equal to the size of the projection screen to ensure that the projection screen can completely cover the 3D display model when in the unfolded state.

[0079] Specifically, the length, width, and height dimensions of the 3D display model are precisely designed, and do not exceed the corresponding side lengths of the projection screen in either the horizontal or vertical directions. Whether it is a 3D display model with regular geometric shapes (such as cube models, cylindrical models, etc.) or an irregular 3D display model (such as artistic models, etc.), its outer contour boundary is always controlled within the effective display area of ​​the projection screen. When the projection screen is in the unfolded state, when viewed from the projector's projection angle, the 3D display model is completely covered by the projection screen, preventing its structural features from interfering with the flat projection image, ensuring that users receive a complete and pure 2D visual experience. When the projection screen is rolled up, the 3D display model is fully exposed, providing an adaptive stereoscopic projection carrier for the 3D projection mode. This size-matching design enables seamless switching between the two projection modes without mutual interference.

[0080] In some embodiments, both the projection screen and the 3D display model are mounted in the projection display area. The projection screen and the 3D display model can be mounted in a front-to-back stacked arrangement in the projection display area using a first mounting portion and a second mounting portion, respectively. The first mounting portion can utilize structures such as embedded rails or suspension brackets, supporting either concealed or non-concealed installation of the projection screen on a wall, within a wall, or within a ceiling or suspended ceiling. For example, a wall-embedded installation allows the screen to be flush with the wall when unfolded, while a wall-mounted installation completely conceals the structure. A suspended design allows the screen to be stored within the suspended ceiling after use. The second mounting portion, used to secure the 3D display model, utilizes structures such as an adjustable frame or a magnetic base, allowing for flexible adaptation based on the model's size and weight. For smaller, lighter 3D display models, a bracket-type mounting mechanism can be used to secure the 3D display model in a suitable position behind the projection screen. For larger 3D display models, the second mounting portion utilizes a frame-type structure to provide a secure connection to the building wall, ensuring the stability of the 3D display model during projection and allowing it to blend seamlessly into the surrounding environment when the projection screen is rolled up. The two installation parts are designed in collaboration to ensure that the projection screen completely blocks the 3D display model when unfolded and fully exposes the model when rolled up, providing hardware support for seamless switching between flat / 3D projection modes.

[0081] Determining the state of the projection screen includes: performing image recognition on the first image information of the projection display area captured by the first image acquisition element of the projector, and determining whether the projection screen is in the expanded state or the rolled-up state based on the image recognition result. The image processing algorithm can adopt a traditional computer vision algorithm or a deep learning algorithm, etc., and is not limited to this. For example, the first image information is first pre-processed, including grayscale, noise reduction and other operations to improve the image quality. Then, the outline of the projection screen is identified by an edge detection algorithm. If the complete screen edge outline is detected and its coverage area reaches a preset threshold, it is determined that the projection screen is in the expanded state; conversely, if the screen edge outline is incomplete and at least part of the structural features of the rear 3D display model can be clearly identified, it is determined that the projection screen is in the rolled-up state.

[0082] Among them, the first image acquisition element can be a camera, and its parameters such as resolution and frame rate can be set according to actual needs, and there is no limitation on this. For example, the first image acquisition element can adopt a wide-angle lens. The first image acquisition element can be integrated on the projector. In specific implementation, the camera can be installed at the front end of the projector, with the lens facing the projection display area to ensure that the image of the projection display area can be fully captured. This integrated design enables the camera to capture image information of the projection screen and the area where the 3D display model is located in real time, while avoiding the need for additional installation space and simplifying the system structure. In addition, the camera is directly connected to the processor inside the projector, and can quickly transmit the collected image data to the processor for analysis and processing, providing data support for accurate judgment of the status of the projection screen.

[0083] In some embodiments, the projection system further includes an electric reeling mechanism, which is used to control the projection screen to be in an unfolded state or a reeled state. For example, the electric reeling mechanism may include a motor, a transmission component, and a limit device. The motor serves as a core driving component, and a servo motor or a stepper motor may be selected, without limitation. The motor is connected to the projection screen through transmission components such as gears and belts, and accurately drives the projection screen to be stably retracted and extended. The limit device is composed of sensors installed at both ends of the guide rail. The sensor type may be a photoelectric sensor, a Hall sensor, etc., without limitation. When the screen moves to the extreme position, the sensor triggers a signal, and the motor stops running immediately to prevent the projection screen from being overly retracted and extended.

[0084] The projection method further includes determining the state of the projection screen based on electrical signals. Specifically, when the electric retracting mechanism drives the projection screen to unfold or retract, electrical signals representing the operating state are generated, such as current changes and pulse signals. By analyzing these electrical signals, it is determined whether the projection screen is in the unfolded or retracted state, and the flat projection mode or 3D projection mode is switched accordingly.

[0085] For example, determining the state of the projection screen based on the electrical signal includes: determining that the projection screen is in an extended state when the electrical signal has a first signal value; and determining that the projection screen is in a retracted state when the electrical signal has a second signal value. The signal value setting method and value range can be adjusted according to actual circuit requirements and are not limited thereto.

[0086] For example, when the electric retracting mechanism drives the projection screen to unfold, its electrical signal is 1, and thus, when the signal value is 1, the projection screen can be determined to be in the unfolded state; when the electric retracting mechanism drives the projection screen to retract, its electrical signal is 0, and thus, when the signal value is 0, the projection screen can be determined to be in the retracted state. In actual applications, the specific values ​​and corresponding relationships of the signal values ​​are merely examples and can be variously set according to system design requirements, and are not limited to this.

[0087] In some embodiments, the projection method further includes capturing second image information of a 3D display model in a 3D projection mode. A storage element of the projector stores preset 3D display model information and a 3D display screen template associated with the preset 3D display model information. The second image information captured by the first image capture element may include captured size information of the 3D display model, and accordingly, the preset 3D display model information may include preset size information of the 3D display model. Alternatively, the 3D display model may be provided with a code mark, and the second image information captured by the first image capture element may include captured image information of the code mark, and the preset 3D display model information may include preset mark information of the code mark on the 3D display model.

[0088] Alternatively, the preset 3D display model information and the 3D display screen template associated with the preset 3D display model information may also be stored in a cloud that is communicatively connected to the processor, which is not limited thereto.

[0089] When the collected second image information includes image information of a code mark, the projection method further includes: matching the second image information with the 3D display model information, and when the second image information and the 3D display model information match, calling a 3D display screen template from a storage element or the cloud, and based on the 3D display screen template, causing the projection lens to emit projection light toward the exposed 3D display model to form a 3D projection screen. During the matching process, by comparing the code mark in the second image information with the preset mark information, the code mark set on the 3D display model can be in the form of a QR code, an AR mark, etc. The encoding rules and recognition algorithms of the mark can be customized according to system requirements and are not limited to this. By identifying the code mark, the corresponding 3D display screen template can be quickly indexed to achieve accurate matching between the 3D display model and the 3D display screen template. Afterwards, the 3D display screen template is called, the 3D display screen template is converted into a projection signal, and the projection lens is controlled to emit projection light toward the exposed 3D display model according to the projection signal to form a 3D projection screen.

[0090] It should be noted that in the case described above where multiple 3D display screen templates are stored in the storage element or cloud, the first image acquisition element captures the second image information of the 3D display model to match the appropriate 3D display screen template, and then calls the matched 3D display screen template to cause the projection lens to emit projection light toward the exposed 3D display model to form a 3D projection screen. If only one 3D display screen template is stored in the storage element or cloud, the first image acquisition element is not required to capture the second image information of the 3D display model. In 3D projection mode, the 3D display screen template can be directly called, and then, based on the 3D display screen template, the projection lens can emit projection light toward the exposed 3D display model to form a 3D projection screen.

[0091] In other embodiments, the 3D display screen template may not be stored in the storage element or the cloud. When the first image acquisition element acquires second image information of the 3D display model in 3D projection mode, and the acquired second image information includes acquisition size information of the 3D display model, the projection method further includes: obtaining a 3D display screen template modeled based on the second image information, and causing the projection lens to emit projection light toward the exposed 3D display model based on the 3D display screen template to form a 3D projection screen. The second image information can be uploaded to the cloud, and a 3D modeling process can be performed in the cloud to obtain the 3D display screen template, or the 3D modeling process can be performed locally to obtain the 3D display screen template. For example, the second image information can be processed in the cloud or locally using a real-time modeling algorithm. The algorithm can adopt feature point-based modeling, monocular depth modeling, deep learning-based modeling, etc., without limitation. A 3D display screen template that matches the actual model is generated based on the acquired size information of the 3D display model, and the projection lens is caused to emit projection light toward the exposed 3D display model based on the 3D display screen template to form a 3D projection screen.

[0092] In some embodiments, the storage element also presets distortion correction parameters. The types of distortion correction parameters may include geometric distortion coefficients, chromatic aberration compensation data, etc. The specific content can be customized according to the characteristics of the projection lens and the shape of the 3D display model, and is not limited to this.

[0093] The projection method also includes: when the projection lens emits projection light to the exposed 3D display model based on the 3D display screen template to form a 3D projection screen, calling the distortion correction parameters to perform distortion correction on the 3D projection screen so that the formed 3D projection screen matches the 3D display model. By calling the distortion correction parameters for processing, the deformation of the screen can be effectively corrected, so that the formed 3D projection screen matches the 3D display model, ensuring that the projection screen completely and accurately covers the surface of the 3D display model, presenting a clear, non-distorted stereoscopic visual effect. Of course, the distortion correction parameters can also be generated in real time, which is not limited to this. For example, the corresponding distortion correction parameters can be generated in real time based on the second image information and the 3D display screen template.

[0094] It is worth noting that the preset 3D display model information, 3D display screen template and distortion correction parameters can be stored in the same storage element or in different storage elements.

[0095] In some embodiments, the projection lens is a zoom lens. For example, it can be a motorized zoom lens, which automatically adjusts the focal length through a motorized mechanism. Other lens types with zoom capabilities can also be used, and this is not limited to this. The motorized mechanism can be driven by a stepper motor or a servo motor, and the specific type is selected based on actual needs and is not limited to this.

[0096] The projection method further includes adjusting the zoom ratio of the zoom lens based on the second image information so that the size of the resulting 3D projection image matches the size of the 3D display model. Taking the example of the second image information including the acquired size information of the 3D display model, the difference between the current model and the ideal projection size is calculated based on the acquired size information of the 3D display model, and the difference is converted into a control signal. This control signal drives the electric mechanism of the zoom lens to adjust the position of the internal lens group, precisely changing the zoom ratio of the lens so that the projection range of the projection light accurately matches the size of the 3D display model, ensuring that the projection image completely covers the model surface without image overflow or incomplete projection, thereby presenting a clear and complete 3D projection effect.

[0097] In some embodiments, the projection system further includes a remote control device for issuing remote control commands to the projector. The remote control device may be an infrared remote control, a Bluetooth remote control, or a Wi-Fi remote control, without limitation. For example, an infrared remote control transmits commands by emitting specifically coded infrared signals; a Bluetooth remote control utilizes low-power Bluetooth technology to establish a wireless connection with the projector and transmit command signals. The specific method used can be flexibly selected based on actual needs.

[0098] The projector includes a remote control receiving element for receiving remote control commands, which is electrically connected to the processor. The type of remote control receiving element matches the transmission method of the remote control device, for example, an infrared remote control corresponds to an infrared receiving head, and a Bluetooth remote control corresponds to a Bluetooth receiving module. The installation location of the remote control receiving element can be optimized based on the structural design of the projector and is not limited to this.

[0099] The projection method also includes: calling a flat projection mode or a 3D projection mode according to a remote control command. The user can send a command through the preset function buttons on the remote control device (such as the "2D mode button" and the "3D mode button"). After receiving the command, the projector parses the command content and performs the corresponding operation. When a flat projection mode command is received, the projection screen is controlled to unfold by the electric reeling mechanism, and the projection lens is controlled to project a flat image onto the projection screen; when a 3D projection mode command is received, the projection screen is controlled to retract by the electric reeling mechanism, a projection image matching the 3D display model is called, and the projection lens is controlled to project a stereoscopic image onto the 3D display model. The operation method and command definition can be adjusted according to user needs and are not limited to this.

[0100] In some embodiments, the projection system further includes an outdoor information collection device, which includes an access control device and a second image acquisition element. The access control device can take the form of a doorbell, visitor system, password lock, fingerprint lock, facial recognition access control, and other devices, without limitation. The second image acquisition element can be a high-definition camera, a panoramic camera, or other devices. Parameters such as resolution and viewing angle can be customized based on actual needs and are not limited thereto. The access control device and the second image acquisition element are electrically connected to enable interactive signal transmission.

[0101] Access control devices are designed to generate trigger signals in response to user access commands. Access commands can be input in a variety of ways, such as by ringing the doorbell, entering a password, scanning a fingerprint, or performing facial recognition. The device's internal sensing module and control circuitry verify the input information and, upon successful verification, generate a specifically coded trigger signal. The signal encoding rules can be customized based on system security requirements and are not specified.

[0102] The second image acquisition component is configured to respond to a trigger signal and, based on the trigger signal, collect information about the outdoor environment and transmit it to the processor. Upon receiving the trigger signal from the access control device, the second image acquisition component automatically activates and captures the outdoor scene at a preset frame rate and resolution. The captured information includes, but is not limited to, images and dynamic video. The acquisition parameters can be automatically adjusted based on lighting conditions, and are not limited to these parameters.

[0103] The projection method further includes invoking a plane projection mode to project outdoor environmental information onto a projection screen. The received outdoor environmental information is decoded and analyzed, and the projection screen is controlled to unfold via a motorized retracting mechanism (if the projection screen is already unfolded, no further unfolding is required). The outdoor environmental information is converted into a projection signal, and the projection lens is controlled to project a clear image onto the projection screen, allowing indoor users to intuitively view outdoor conditions. Parameters such as the display effect and aspect ratio can be adjusted based on screen size and user needs, and are not limited to this.

[0104] In summary, if Figure 4 As shown, the process of the projection method in this embodiment can be as follows: First, first image information of the projection display area is captured or an electrical signal is received from a motorized reeling mechanism to determine the state of the projection screen. When the projection screen is in the unfolded state, a planar projection mode is invoked, causing the projection lens to emit projection light toward the projection screen to form a planar projection image. When the projection screen is in the reeled state, a 3D projection mode is invoked. When the 3D projection mode is invoked, second image information of the 3D display model is captured. If the second image information includes image information of a code mark, the second image information is matched with the 3D display model information. When the second image information and the 3D display model information match, a 3D display image template is retrieved from a storage device or the cloud. If the second image information includes captured size information of the 3D display model, a 3D display image template modeled based on the second image information is obtained. Subsequently, based on the 3D display image template, the projection lens is caused to emit projection light toward the exposed 3D display model to form a 3D projection image. When forming the 3D projection image, distortion correction can be performed on the 3D projection image based on distortion correction parameters to ensure that the formed 3D projection image matches the 3D display model. In addition, this embodiment can also respond to the user's access instruction through the access control device, thereby collecting outdoor environment information, and calling the plane projection mode to project the outdoor environment information onto the projection screen.

[0105] Through the above-mentioned structural design, the projection system of this embodiment breaks through the limitation of traditional projection equipment that only serves as a display terminal. In the prior art, the projection system is usually independent of the building security or environmental monitoring system and cannot present outdoor dynamic information in real time. However, this solution uses the linkage between the outdoor information collection device and the projection screen. When a visitor triggers the access control device, the plane projection mode is immediately called to synchronously display the outdoor image on the indoor projection screen, realizing the innovative application of "real-time projection of outdoor scenes". For example, users can visually confirm the visitor's identity or observe the outdoor environment conditions on the projection screen without approaching doors and windows or checking their mobile phones. This significantly improves the functional scalability of the projection system and the convenience of user experience, and effectively solves the technical problem of the separation of display capabilities and environmental perception in the prior art.

[0106] In addition, since other introductions to the projection method can be found in the description of the first embodiment, they will not be further elaborated here.

[0107] In summary, the projection system and projection method according to the embodiments of the present application, by providing a retractable flat screen and a 3D display model, enable the projection system to automatically switch between flat and 3D projection modes depending on the state of the projection screen. This not only meets the needs of traditional flat-screen displays, but also utilizes the 3D display model to achieve a stereoscopic projection effect, thereby enhancing the display diversity of the projection system and providing users with a diverse visual experience. Furthermore, when the projection screen is retracted, the 3D display model can serve as a decorative element in the space, naturally blending in with the interior environment. This effectively addresses the lack of spatial aesthetics associated with traditional projection equipment when not in use, making the projection area both functional and decorative.

[0108] Moreover, by linking the outdoor information collection device with the projection screen, the plane projection mode is called to synchronously display the outdoor image on the indoor projection screen, which significantly improves the functional scalability and user experience convenience of the projection system, and effectively solves the technical problem of separation of display capability and environmental perception in the existing technology.

[0109] Although example embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above example embodiments are merely illustrative and are not intended to limit the scope of the present application. Various changes and modifications may be made therein by those skilled in the art without departing from the scope and spirit of the present application. All such changes and modifications are intended to be included within the scope of the present application as required by the appended claims.

[0110] Similarly, it should be understood that in order to streamline the present application and aid in understanding one or more of the various application aspects, in the description of the exemplary embodiments of the present application, the various features of the present application are sometimes grouped together into a single embodiment, figure, or description thereof. However, this approach of the present application should not be interpreted as reflecting the intention that the claimed application requires more features than those explicitly recited in each claim. More precisely, as reflected in the corresponding claims, the point of the application is that the corresponding technical problem can be solved with fewer features than all the features of a single disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into the detailed description, with each claim itself serving as a separate embodiment of the present application.

[0111] Furthermore, those skilled in the art will appreciate that although some embodiments described herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are intended to be within the scope of this application and to form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

[0112] It should be noted that the above embodiments are illustrative rather than limiting of the present application, and that those skilled in the art may devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The use of the words first, second, and third, etc., does not denote any order. These words may be interpreted as designations.

Claims

1. A projection system, characterized in that: The projection system includes a projector, a projection screen and a 3D display model; The projector includes a projection lens and a processor; The projection screen has an unfolded state and a retracted state, and in the unfolded state, the projection screen blocks the 3D display model, and in the retracted state, the projection screen exposes the 3D display model; The processor is used to determine the state of the projection screen, and call the plane projection mode when the projection screen is in the unfolded state, so that the projection lens emits projection light to the projection screen to form a plane projection picture; and call the 3D projection mode when the projection screen is in the rolled-up state, so that the projection lens emits projection light to the exposed 3D display model to form a 3D projection picture.

2. The projection system according to claim 1, wherein: The projection screen and the 3D display model are both installed in the projection display area; The projector further includes a first image acquisition element, which is used to acquire first image information of the projection display area; The processor is configured to perform image recognition on the first image information, and determine whether the projection screen is in an unfolded state or a rolled-up state according to an image recognition result.

3. The projection system according to claim 2, wherein: The first image acquisition element is further configured to acquire second image information of the 3D display model in the 3D projection mode; The projector further includes a storage element electrically connected to the processor, wherein the storage element stores preset 3D display model information and a 3D display screen template associated with the preset 3D display model information; and / or the preset 3D display model information and the 3D display screen template associated with the preset 3D display model information are stored in a cloud that is communicatively connected to the processor; The second image information includes captured size information of the 3D display model, and the preset 3D display model information includes preset size information of the 3D display model; and / or a code mark is provided on the 3D display model, the second image information includes captured image information of the code mark, and the preset 3D display model information includes preset mark information of the code mark on the 3D display model; When the collected second image information includes image information of the code mark, the processor is configured to: matching the second image information with the 3D display model information, and when the second image information and the 3D display model information match, calling the 3D display screen template from the storage element or the cloud, and causing the projection lens to emit projection light toward the exposed 3D display model to form a 3D projection screen based on the 3D display screen template; Alternatively, when the acquired second image information includes acquisition size information of the 3D display model, the processor is configured to: A 3D display screen template modeled according to the second image information is acquired, and based on the 3D display screen template, the projection lens is caused to emit projection light toward the exposed 3D display model to form a 3D projection screen.

4. The projection system according to claim 3, wherein: The processor is further configured to: When the projection lens emits projection light toward the exposed 3D display model to form a 3D projection image based on the 3D display image template, the 3D projection image is subjected to distortion correction based on the distortion correction parameters so that the formed 3D projection image matches the 3D display model, wherein the distortion correction parameters are preset in the storage element, or the distortion correction parameters are generated in real time by the processor.

5. The projection system according to claim 2, wherein: The first image acquisition element includes a wide-angle lens.

6. The projection system according to claim 3, wherein: The projection lens is a zoom lens, and the processor is further configured to: The zoom ratio of the zoom lens is adjusted according to the second image information so that the size of the formed 3D projection image matches the size of the 3D display model.

7. The projection system according to any one of claims 1 to 6, wherein: The projection system further includes an electric reeling mechanism, which is used to control the projection screen to be in an unfolded state or a reeled state; The processor is electrically connected to the electric winding mechanism, and the processor is used to: An electrical signal from the electric reeling mechanism is received, and a state of the projection screen is determined according to the electrical signal.

8. The projection system according to claim 7, wherein: The processor determines the state of the projection screen according to the electrical signal, including: When the electrical signal has a first signal value, the processor determines that the projection screen is in an unfolded state; When the electrical signal has a second signal value, the processor determines that the projection screen is in a rolled-up state.

9. The projection system according to claim 1, wherein: The projection system also includes a remote control device, which is used to issue remote control commands to the projector. The projector includes a remote control receiving element for receiving the remote control commands. The remote control receiving element is electrically connected to the processor. The processor is used to call the plane projection mode or the 3D projection mode according to the remote control commands received by the remote control receiving element.

10. The projection system according to claim 1, wherein: The projection system further includes an outdoor information acquisition device, the outdoor information acquisition device including an access control device and a second image acquisition element, the access control device and the second image acquisition element are electrically connected, and the second image acquisition element is communicatively connected to the processor; The access control device is used to generate a trigger signal in response to an access instruction from a user; The second image acquisition element is used to respond to the trigger signal, and collect outdoor environment information according to the trigger signal and send it to the processor; The processor is used to receive the outdoor environment information and call the plane projection mode to project the outdoor environment information onto the projection screen.

11. The projection system according to claim 10, wherein: The access control device includes a doorbell device or a visitor system.

12. The projection system according to claim 1, wherein: The size of the 3D display model is smaller than or equal to the size of the projection screen.

13. A projection method, characterized in that: Applied to a projection system, the projection system includes a projector, a projection screen, and a 3D display model, and the projection method includes: Determining a state of the projection screen; wherein the projection screen has an unfolded state and a retracted state, and in the unfolded state the 3D display model is obscured, and in the retracted state the 3D display model is exposed; When the projection screen is in the unfolded state, the plane projection mode is called so that the projection lens of the projector emits projection light toward the projection screen to form a plane projection picture; when the projection screen is in the rolled-up state, the 3D projection mode is called so that the projection lens emits projection light toward the exposed 3D display model to form a 3D projection picture.

14. The projection method according to claim 13, wherein: The projection screen and the 3D display model are both installed in a projection display area, and determining the state of the projection screen includes: Image recognition is performed on the first image information of the projection display area captured by the first image capturing element of the projector, and it is determined whether the projection screen is in an unfolded state or a rolled-up state according to the image recognition result.

15. The projection method according to claim 14, wherein: The projection method further includes collecting second image information of the 3D display model in the 3D projection mode; The storage element of the projector stores preset 3D display model information and a 3D display screen template associated with the preset 3D display model information; and / or the preset 3D display model information and the 3D display screen template associated with the preset 3D display model information are stored in a cloud that is communicatively connected to the projector; The second image information includes captured size information of the 3D display model, and the preset 3D display model information includes preset size information of the 3D display model; and / or a code mark is provided on the 3D display model, the second image information includes captured image information of the code mark, and the preset 3D display model information includes preset mark information of the code mark on the 3D display model; When the collected second image information includes image information of the code mark, the projection method further includes: matching the second image information with the 3D display model information, and when the second image information and the 3D display model information match, calling the 3D display screen template from the storage element or the cloud, and causing the projection lens to emit projection light toward the exposed 3D display model to form a 3D projection screen based on the 3D display screen template; Alternatively, when the collected second image information includes collected size information of the 3D display model, the projection method further includes: A 3D display screen template modeled according to the second image information is acquired, and based on the 3D display screen template, the projection lens is caused to emit projection light toward the exposed 3D display model to form a 3D projection screen.

16. The projection method according to claim 15, wherein: The projection method further comprises: When the projection lens emits projection light toward the exposed 3D display model to form a 3D projection image based on the 3D display image template, the 3D projection image is subjected to distortion correction based on the distortion correction parameters so that the formed 3D projection image matches the 3D display model.

17. The projection method according to claim 14, wherein: The first image acquisition element includes a wide-angle lens.

18. The projection method according to claim 15, wherein: The projection lens is a zoom lens, and the projection method further includes: The zoom ratio of the zoom lens is adjusted according to the second image information so that the size of the formed 3D projection image matches the size of the 3D display model.

19. The projection method according to any one of claims 13 to 18, wherein: The projection system further includes an electric reeling mechanism, which is used to control the projection screen to be in an unfolded state or a reeled state. The projection method further includes: The state of the projection screen is determined based on the electrical signal.

20. The projection method according to claim 19, wherein: Determining the state of the projection screen according to the electrical signal includes: When the electrical signal has a first signal value, determining that the projection screen is in an unfolded state; When the electrical signal has a second signal value, it is determined that the projection screen is in a rolled-up state.

21. The projection method according to claim 13, wherein: The projection system further includes a remote control device, the remote control device being used to issue remote control instructions to the projector, and the projection method further includes: The plane projection mode or the 3D projection mode is called according to the remote control instruction.

22. The projection method according to claim 13, wherein: The projection system further includes an outdoor information acquisition device, the outdoor information acquisition device including an access control device and a second image acquisition element, the access control device and the second image acquisition element being electrically connected; The access control device is used to generate a trigger signal in response to an access instruction from a user; The second image acquisition element is used to respond to the trigger signal and acquire outdoor environment information according to the trigger signal; The projection method further comprises: The plane projection mode is called to project the outdoor environment information onto the projection screen.

23. The projection method according to claim 22, wherein: The access control device includes a doorbell device or a visitor system.

24. The projection method according to claim 13, wherein: The size of the 3D display model is smaller than or equal to the size of the projection screen.

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