A lossless side projection manual fine-tuning focusing control method and projection device
Patent Information
- Application Number
- CN202611029454.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-07-10
- Publication Date
- 2026-10-20
AI Technical Summary
[0003]现有光学无损侧投投影设备，其对焦方式多以自动对焦为主，部分设备支持手动对焦，但手动对焦逻辑均沿用正投场景的单一调节模式，仅调节镜头轴向对焦距离，未针对侧投场景的特殊性进行适配
[0023]相对于相关技术，本申请的无损侧投投影手动微调对焦控制方法，在接收到控制端发出的无损侧投微调启动指令后，驱动投影设备进入无损侧投模式，锁定当前投影分辨率和数码梯形参数后，根据控制端发出的手动微调对焦操作指令联动调控投影镜头的轴向对焦行程与光路组件的倾斜角度，基于沙姆定律动态匹配倾斜焦平面，实时修正侧投场景下的投影画面，使手动交互逻辑与光学补偿联动，可以简化用户操作，提升对焦精度和调节效率，可以保留无损画质，适用于各类光学侧投投影设备。
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Abstract
Description
Technical Field
[0001] This application relates to the technical field of projected image adjustment, specifically to a non-destructive side projection manual fine-tuning focus control method and projection device. Background Technology
[0002] With the widespread adoption of projection devices, side projection has become one of the mainstream installation methods because it does not require direct contact with the projection screen and is suitable for more spatial scenarios. Currently, the side projection technology on the market includes optical lossless side projection, which achieves image correction through optical methods such as lens tilt adjustment and light path compensation. It does not require pixel cropping and can fully preserve the original resolution and brightness of the projection device, meeting users' needs for high-definition image quality.
[0003] Existing optical lossless side projection devices primarily rely on autofocus, with some supporting manual focus. However, the manual focus logic largely follows the single adjustment mode of front projection, adjusting only the lens axis focus distance without adapting to the specific characteristics of side projection. Because the projection optical axis is tilted relative to the screen during side projection, the focal plane is tilted. Adjusting only the focus distance is insufficient to achieve clear focus across the entire image, easily resulting in blurry edges and inconsistent sharpness between near and far areas. Furthermore, existing manual focus interaction is not linked to the optical side projection compensation logic, requiring users to repeatedly and blindly adjust, leading to cumbersome operation, low efficiency, and an inability to quickly and accurately match the tilted focal plane in side projection scenarios. Summary of the Invention
[0004] The purpose of this application is to overcome the shortcomings and deficiencies in the prior art and to provide a non-destructive side projection manual fine-tuning focus control method and projection device.
[0005] The first aspect of this application provides a method for manual fine-tuning focus control of a non-destructive side projection projection, including:
[0006] The system receives a lossless side projection fine-tuning start command from the control terminal, drives the projection device into lossless side projection mode, and locks the current projection resolution and digital keystone parameters.
[0007] It receives manual fine-tuning focus operation commands from the control terminal, and adjusts the axial focus travel of the projection lens and the tilt angle of the optical path components in conjunction with them. Based on Scherm's law, it dynamically matches the tilted focal plane and corrects the projected image in the side projection scene in real time.
[0008] The system receives an operation lock confirmation command from the control terminal, solidifies the current axial focus travel of the projection lens and the current tilt angle of the optical path components, and completes precise focus lock for non-destructive side projection.
[0009] In one implementation, the control terminal is a knob adjustment control terminal, and the manual fine-tuning focus operation command is a knob adjustment command.
[0010] In one implementation, the control terminal is a button adjustment control terminal, and the manual fine-tuning focus operation command is a button increase / decrease adjustment command.
[0011] In one implementation, the control terminal is a touch-sensitive sliding control terminal, and the manual fine-tuning focus operation command is a touch-sensitive sliding adjustment command.
[0012] As one implementation, the manual fine-tuning focus operation command includes a coarse adjustment command and a fine adjustment command. The coarse adjustment command is used for continuous operation with a long stroke, and the fine adjustment command is used for fine focus adjustment operation.
[0013] As one implementation, after receiving the lossless side-projection fine-tuning start command from the control terminal, the method further includes:
[0014] Based on preset tool display parameters, a non-destructive side projection fine-tuning auxiliary interface is generated; the non-destructive side projection fine-tuning auxiliary interface includes several fine-tuning auxiliary tools;
[0015] Based on the preset interface transparency, the projection device is driven to simultaneously project the lossless side projection fine-tuning auxiliary interface and the current screen.
[0016] In one implementation, the plurality of fine-tuning auxiliary tools include peak focus lines, sharpness scale bars, and fine-tuning direction guides; the tool display parameters include line color, line thickness, guide icon style of the fine-tuning direction guide, and display position of each fine-tuning auxiliary tool.
[0017] As one implementation, after receiving the operation lock confirmation command from the control terminal and fixing the current axial focusing stroke of the projection lens and the current tilt angle of the optical path assembly, the method further includes:
[0018] The current axial focusing distance of the storage projection lens and the current tilt angle of the optical path assembly are historical parameters;
[0019] A historical parameter auxiliary tool is generated based on multiple sets of historical parameters and rendered on the lossless side projection fine-tuning auxiliary interface.
[0020] As one implementation method, after the step of generating a historical parameter auxiliary tool based on multiple sets of historical parameters and rendering it on the lossless side-projection fine-tuning auxiliary interface, the method further includes:
[0021] In response to the historical parameter selection instruction, the corresponding target historical parameter is called from the multiple sets of historical parameters;
[0022] Based on the target historical parameters, the axial focusing stroke of the projection lens and the tilt angle of the optical path assembly are automatically adjusted.
[0023] Compared to related technologies, the lossless side projection manual fine-tuning focus control method of this application, upon receiving the lossless side projection fine-tuning start command from the control terminal, drives the projection device into lossless side projection mode, locks the current projection resolution and digital keystone parameters, and then, in conjunction with the manual fine-tuning focus operation command from the control terminal, adjusts the axial focus travel of the projection lens and the tilt angle of the optical path components. Based on Scherm's law, it dynamically matches the tilted focal plane and corrects the projected image in the side projection scenario in real time. This linkage between manual interaction logic and optical compensation simplifies user operation, improves focus accuracy and adjustment efficiency, preserves lossless image quality, and is applicable to various optical side projection devices.
[0024] A second aspect of this application provides a projection device, including: a storage device, a processor, and a computer program stored in the storage device and executable by the processor, wherein the processor executes the computer program to implement the steps of the lossless side projection manual fine-tuning focus control method described above.
[0025] To provide a clearer understanding of this application, the specific embodiments of this application will be described below in conjunction with the accompanying drawings. Attached Figure Description
[0026] Figure 1 This is a flowchart of a manual fine-tuning focus control method for non-destructive side projection according to an embodiment of this application.
[0027] Figure 2 This is a projection flowchart of a fine-tuning auxiliary interface according to an embodiment of this application.
[0028] Figure 3 This is a schematic diagram of a projection device according to an embodiment of this application.
[0029] 200. Projection device; 201. Memory; 202. Processor. Detailed Implementation
[0030] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.
[0031] It should be understood that the described embodiments are merely some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of the embodiments of this application.
[0032] In the following description, when referring to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. In the description of this application, it should be understood that the terms "first," "second," "third," etc., are used only to distinguish similar objects and are not necessarily used to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. The singular forms "a," "the," and "the" used in this application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. The word "if" as used herein can be interpreted as "when," "when," or "in response to determination."
[0033] Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.
[0034] Please see Figure 1 This is a flowchart of a manual fine-tuning focus control method for non-destructive side projection according to the first embodiment of this application. The method includes:
[0035] S1: Receives the lossless side projection fine-tuning start command from the control terminal, drives the projection device into lossless side projection mode, and locks the current projection resolution and digital keystone parameters.
[0036] The control terminal is communicatively connected to the projection device. For example, the control terminal communicates and interacts with the projection device through wireless communication technologies such as infrared, Bluetooth, Wi-Fi, and satellite imagery.
[0037] S2: Receives manual fine-tuning focus operation commands from the control terminal, and adjusts the axial focus travel of the projection lens and the tilt angle of the optical path components in conjunction with them. Based on Schereschewsky's Law, it dynamically matches the tilted focal plane and corrects the projected image in the side projection scene in real time.
[0038] Scham's Law extends the range of sharpness to the entire tilted object plane by actively tilting the lens plane or image plane to change the angle of the focal plane. This is fundamentally different from traditional photography, which relies on reducing the aperture to increase the depth of field parallel to the sensor plane.
[0039] In traditional side projection, the tilted screen results in varying distances from the lens to different areas, making it impossible to cover the full depth of field simply by reducing the aperture. SAM technology, however, uses a mechanical structure to actively tilt the lens or chip angle, causing the three planes to converge and achieving clear, equidistant imaging across the entire screen. For example, a ToF+CMOS dual-module system can calculate the side projection angle in milliseconds, controlling a stepper motor in conjunction with a magnetic closed-loop system to dynamically adjust the orientation of the projection lens and optical path components, allowing the optical focal plane to actively align with the wall angle. ToF (Time of Flight) is a sensing technology that precisely measures distance by measuring the round-trip time of a light pulse. CMOS is an image sensor used for intelligent focusing and image correction; essentially, it's a miniature camera.
[0040] The control terminal can be a knob adjustment control terminal, a button adjustment control terminal, or a touch-slide control terminal, or it can be a combined control terminal including knob adjustment function, button adjustment function, and touch-slide adjustment function. When the control terminal is a knob adjustment control terminal, the manual fine-tuning focus operation command is a knob adjustment command. When the control terminal is a button adjustment control terminal, the manual fine-tuning focus operation command is a button increase / decrease adjustment command. When the control terminal is a touch-slide control terminal, the manual fine-tuning focus operation command is a touch-slide adjustment command.
[0041] S3: Receives the operation lock confirmation command from the control terminal, solidifies the current axial focus travel of the projection lens and the current tilt angle of the optical path components, and completes the precise focus lock for non-destructive side projection.
[0042] Side projection refers to a projection device that is not directly facing the screen or wall, but projecting at an angle. While this non-direct projection method solves the limitations of spatial layout, it also introduces the dual challenges of image geometric distortion and focal plane shift.
[0043] In one feasible embodiment, the manual fine-tuning focus operation command includes a coarse adjustment command and a fine adjustment command, wherein the coarse adjustment command is used for continuous operation with a long stroke, and the fine adjustment command is used for fine focus adjustment operation.
[0044] Please see Figure 2 In one feasible embodiment, after the step of receiving the lossless side-projection fine-tuning start command issued by the control terminal, the method further includes:
[0045] S101: Generate a non-destructive side projection fine-tuning auxiliary interface according to preset tool display parameters; the non-destructive side projection fine-tuning auxiliary interface includes several fine-tuning auxiliary tools;
[0046] The aforementioned fine-tuning tools include focus peaking lines, sharpness scales, and fine-tuning direction indicators. The tool display parameters include line color, line thickness, the style of the fine-tuning direction indicator icon, and the display position of each fine-tuning tool. All tool display parameters can use default values or be customized by the user according to their actual usage habits.
[0047] S102: Based on the preset interface transparency, drive the projection device to simultaneously project the lossless side projection fine-tuning auxiliary interface and the current screen.
[0048] The interface transparency can use the default parameter value, or it can be customized by the user according to their actual usage habits.
[0049] In one feasible embodiment, after receiving the operation lock confirmation command from the control terminal and fixing the current axial focus travel of the projection lens and the current tilt angle of the optical path assembly, the method further includes:
[0050] The current axial focusing distance of the storage projection lens and the current tilt angle of the optical path assembly are historical parameters;
[0051] A historical parameter auxiliary tool is generated based on multiple sets of historical parameters and rendered on the lossless side projection fine-tuning auxiliary interface.
[0052] In one feasible embodiment, after the step of generating a historical parameter auxiliary tool based on multiple sets of historical parameters and rendering it on the lossless side projection fine-tuning auxiliary interface, the method further includes:
[0053] In response to the historical parameter selection instruction, the corresponding target historical parameter is called from the multiple sets of historical parameters;
[0054] Based on the target historical parameters, the axial focusing stroke of the projection lens and the tilt angle of the optical path assembly are automatically adjusted.
[0055] Compared to related technologies, the lossless side projection manual fine-tuning focus control method of this application, upon receiving the lossless side projection fine-tuning start command from the control terminal, drives the projection device into lossless side projection mode, locks the current projection resolution and digital keystone parameters, and then, in conjunction with the manual fine-tuning focus operation command from the control terminal, adjusts the axial focus travel of the projection lens and the tilt angle of the optical path components. Based on Scherm's law, it dynamically matches the tilted focal plane and corrects the projected image in the side projection scenario in real time. This linkage between manual interaction logic and optical compensation simplifies user operation, improves focus accuracy and adjustment efficiency, preserves lossless image quality, and is applicable to various optical lossless side projection devices.
[0056] Please see Figure 3The second embodiment of this application provides a projection device 200, including: a storage 201, a processor 202, and a computer program stored in the storage 201 and executable by the processor 202. When the processor 202 executes the computer program, it implements the steps of the lossless side projection manual fine-tuning focus control method as described above.
[0057] It should be noted that when the projection device 200 provided in the second embodiment of this application executes the manual fine-tuning focus control method for non-destructive side projection, the above-mentioned functional steps can be assigned to different functional modules as needed. That is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. In addition, the manual fine-tuning focus control device for non-destructive side projection provided in the second embodiment of this application and the manual fine-tuning focus control method for non-destructive side projection provided in the first embodiment of this application belong to the same concept. The implementation process is detailed in the method embodiment and will not be repeated here.
[0058] The device embodiments described above are merely illustrative. The components described as separate parts may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this application according to actual needs. Those skilled in the art can understand and implement this without any inventive effort.
[0059] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.
[0060] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1The computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function selected in one or more boxes.
[0061] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function selected in one or more boxes.
[0062] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.
[0063] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.
[0064] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.
[0065] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.
[0066] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.
Claims
1. A method for manual fine-tuning focus control of a non-destructive side projection projection, characterized in that, include: The system receives a lossless side projection fine-tuning start command from the control terminal, drives the projection device into lossless side projection mode, and locks the current projection resolution and digital keystone parameters. The system receives manual fine-tuning focus commands from the control terminal, and adjusts the axial focus travel of the projection lens and the tilt angle of the optical path components in conjunction with these commands. Based on Scherm's law, it dynamically matches the tilted focal plane and corrects the projected image in real time for side projection scenarios. The optical path components are LCD screens, mirrors, or lenses. The system receives an operation lock confirmation command from the control terminal, solidifies the current axial focus travel of the projection lens and the current tilt angle of the optical path components, and completes precise focus lock for non-destructive side projection.
2. The manual fine-tuning focus control method for non-destructive side projection according to claim 1, characterized in that, The control terminal is a knob adjustment control terminal, and the manual fine-tuning focus operation command is a knob adjustment command.
3. The non-destructive side projection manual fine-tuning focus control method according to claim 1, characterized in that, The control terminal is a button adjustment control terminal, and the manual fine-tuning focus operation command is a button increase / decrease adjustment command.
4. The manual fine-tuning focus control method for non-destructive side projection according to claim 1, characterized in that, The control terminal is a touch-sensitive sliding control terminal, and the manual fine-tuning focus operation command is a touch-sensitive sliding adjustment command.
5. The non-destructive side projection manual fine-tuning focus control method according to claim 1, characterized in that, The manual focus adjustment operation commands include coarse adjustment commands and fine adjustment commands. The coarse adjustment commands are used for continuous operation with a long stroke, and the fine adjustment commands are used for fine focus adjustment operations.
6. The manual fine-tuning focus control method for non-destructive side projection according to claim 1, characterized in that, After the step of receiving the lossless side-projection fine-tuning start command from the control terminal, the method further includes: Based on preset tool display parameters, a non-destructive side projection fine-tuning auxiliary interface is generated; the non-destructive side projection fine-tuning auxiliary interface includes several fine-tuning auxiliary tools; Based on the preset interface transparency, the projection device is driven to simultaneously project the lossless side projection fine-tuning auxiliary interface and the current screen.
7. The non-destructive side projection manual fine-tuning focus control method according to claim 6, characterized in that, The aforementioned fine-tuning tools include peak focus lines, sharpness scale bars, and fine-tuning direction guides; the tool display parameters include line color, line thickness, guide icon style for the fine-tuning direction guide, and the display position of each fine-tuning tool.
8. The manual fine-tuning focus control method for non-destructive side projection according to claim 6, characterized in that, After receiving the operation lock confirmation command from the control terminal and fixing the current axial focus travel of the projection lens and the current tilt angle of the optical path assembly, the process further includes: The current axial focusing distance of the storage projection lens and the current tilt angle of the optical path assembly are historical parameters; A historical parameter auxiliary tool is generated based on multiple sets of historical parameters and rendered on the lossless side projection fine-tuning auxiliary interface.
9. The manual fine-tuning focus control method for non-destructive side projection according to claim 8, characterized in that, After the step of generating a historical parameter auxiliary tool based on multiple sets of historical parameters and rendering it on the lossless side projection fine-tuning auxiliary interface, the method further includes: In response to the historical parameter selection instruction, the corresponding target historical parameter is called from the multiple sets of historical parameters; Based on the target historical parameters, the axial focusing stroke of the projection lens and the tilt angle of the optical path assembly are automatically adjusted.
10. A projection device, characterized in that: It includes a storage device, a processor, and a computer program stored in the storage device and executable by the processor, wherein the processor executes the computer program to implement the steps of the manual fine-tuning focus control method for non-destructive side projection as described in any one of claims 1 to 9.