Projector setting method
By setting projector parameters through a computer system and automatically transmitting them using a mobile device, the waste of manpower and time during the installation of multiple projectors is eliminated. This enables rapid IP address pairing and lens position setting, thereby improving installation efficiency.
Patent Information
- Application Number
- CN202410652243.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-24
- Publication Date
- 2025-11-28
AI Technical Summary
The current multi-projector installation process requires manual setting of IP addresses and remote control IDs for each projector, and lens adjustment consumes a lot of time and manpower, making it difficult to efficiently stitch and blend multiple projectors together.
The computer system sets the projection space and setup parameters, executes projection simulation programs and distortion correction calculations, generates configuration parameters and stores them in the mobile device, and automatically transmits them to the projector through near-field communication technology, realizing automatic IP address pairing and lens position setting.
It reduces labor and time costs, improves the efficiency of installing and setting up multiple projectors, and enables rapid projector setup and splicing blending.
Smart Images
Figure CN121037539A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present disclosure relates to a projection machine setting method. BACKGROUND
[0002] In current multi-projection applications, multiple projection machines are often used for splicing and fusion to create an immersive experience. The installation process requires many settings to be manually operated, such as the setting of the projection machine network IP address and the remote controller ID. After the machine is installed, each machine needs to be set and paired with the computer end / remote controller, and then further installation settings can be performed. After the initial setting is completed, the projection machine needs to be turned on and an image needs to be projected, and then further lens adjustment (such as focusing, projection image size, and projection position) can be performed.
[0003] However, since the placement position of each projection machine is different, the setting of each projection machine is different, thereby consuming a large amount of time and manpower for parameter adjustment. Moreover, the current setting is performed by human eye recognition and experience, and each machine is corrected and fine-tuned one by one. If installation is missing, the projection machine needs to be repositioned and installed, which is very high in labor cost.
[0004] Therefore, how to propose a projection machine setting method to solve the above problems is a key issue in the current technical field. SUMMARY
[0005] Therefore, how to propose a projection machine setting method to solve the above problems is a key issue in the current technical field.
[0006] In order to achieve the above-mentioned purpose, according to an embodiment of the present disclosure, a projection machine setting method comprises: setting a group of projection space parameters and a group of projection machine installation parameters about at least one projection machine by using a computer system; performing a projection simulation program, which uses a computer system to calculate based on the group of projection space parameters and the group of projection machine installation parameters, and determines a group of setting parameters about the at least one projection machine; setting a group of configuration parameters about the at least one projection machine by using a computer system, wherein the group of configuration parameters comprises at least one of ID number and IP address; and storing the group of configuration parameters and the group of setting parameters about the at least one projection machine to a mobile device.
[0007] In one or more embodiments of the present disclosure, the group of projection machine installation parameters comprises at least one of projection machine position parameter, projection machine installation posture parameter, lens field of view angle parameter, exit pupil distance parameter, and projection optical axis and lens offset parameter.
[0008] In one or more embodiments of the present disclosure, the group of setting parameters comprises at least one of lens focal length / focus distance parameter, lens seat position parameter, and screen setting parameter.
[0009] In one or more embodiments of the present disclosure, the projector setting method further comprises executing a warping correction calculation procedure to generate a set of warping parameters based on the set of projection space parameters and the screen setting parameter in the set of setting parameters by using a computer system.
[0010] In one or more embodiments of the present disclosure, the number of the at least one projector is plural. The projector setting method further comprises calculating a projection overlap area according to the plurality of sets of projection space parameters of at least two of the projectors; and executing a blending calculation procedure to generate a plurality of sets of brightness dimming parameters according to the projection overlap area, wherein the plurality of sets of brightness dimming parameters respectively correspond to the at least two of the projectors.
[0011] In one or more embodiments of the present disclosure, the projector setting method further comprises executing a warping correction calculation procedure to generate a set of warping parameters based on the set of projection space parameters of at least one of the projectors and the screen setting parameter in the set of setting parameters by using a computer system; and calculating a blending initial value of the plurality of sets of brightness dimming parameters according to the set of warping parameters.
[0012] In one or more embodiments of the present disclosure, the projector setting method further comprises calculating a dark portion brightness gap of the projection overlap area; and generating a set of dark portion brightness compensation parameters according to the dark portion brightness gap.
[0013] To achieve the above object, according to one embodiment of the present disclosure, a projector setting method comprises: storing a plurality of sets of configuration parameters and a plurality of sets of setting parameters to a mobile device, wherein the plurality of sets of configuration parameters respectively correspond to the plurality of sets of setting parameters, and each of the plurality of sets of configuration parameters comprises at least one of an ID number and an IP address; and executing a data transmission procedure to sequentially transmit the plurality of sets of configuration parameters and the plurality of sets of setting parameters respectively corresponding thereto to a plurality of projectors by using the mobile device.
[0014] In one or more embodiments of the present disclosure, the data transmission procedure is executed by using a near field communication technology.
[0015] In one or more embodiments of the present disclosure, during the execution of the data transmission procedure, the projectors are in a power-off state.
[0016] In summary, in the projector setup method disclosed herein, the projection simulation of the projector can be performed in a computer system to pre-set the projector setup parameters, configuration parameters, and other parameters, which are then transferred to a mobile device. When the projector is first unpacked, the relevant configuration parameters can be written into the memory of the corresponding projector using the mobile device. After multiple projectors are individually installed and set up, each projector can automatically import the simulation settings, thereby quickly establishing IP address pairing, site selection, and projector lens position settings with the computer. Therefore, the projector setup method disclosed herein reduces manpower and time costs, thereby accelerating the installation and setup process of multiple projectors.
[0017] The above description is only used to illustrate the problem to be solved by this disclosure, the technical means to solve the problem, and the effects produced, etc. The specific details of this disclosure will be described in detail in the following implementation method and related drawings. Attached Figure Description
[0018] To make the above and other objects, features, advantages and embodiments disclosed herein more apparent and understandable, the accompanying drawings are described below:
[0019] Figure 1 A flowchart illustrating a projector setting method according to an embodiment of this disclosure;
[0020] Figure 2 A schematic diagram illustrating a simulation screen executed by a computer system according to an embodiment of this disclosure;
[0021] Figure 3 A schematic diagram illustrating a projection cone according to an embodiment of this disclosure;
[0022] Figure 4A A schematic diagram illustrating a projection simulation program executed using a computer system according to an embodiment of this disclosure;
[0023] Figure 4B for Figure 4A Another schematic diagram of the projection simulation program; Figure 5A This is a schematic diagram illustrating the process before a deformation correction calculation program is executed using a computer system according to an embodiment of this disclosure;
[0024] Figure 5B This is a schematic diagram illustrating the deformation correction calculation program executed by a computer system according to an embodiment of this disclosure;
[0025] Figure 6A This is a schematic diagram illustrating the execution of a fusion computing program using a computer system according to an embodiment of this disclosure;
[0026] Figure 6BFIG. 1 shows a schematic diagram of a computer system according to an embodiment of the present disclosure;
[0027] Figure 7 FIG. 2 shows a schematic diagram of a computer system and a mobile device according to an embodiment of the present disclosure;
[0028] Figure 8 FIG. 3 shows a flowchart of a projector setting method according to another embodiment of the present disclosure;
[0029] Figure 9 FIG. 4 shows a schematic diagram of a mobile device and multiple projectors according to an embodiment of the present disclosure;
[0030] Figure 10 FIG. 5 shows a schematic diagram of a mobile device and a projector in FIG. 1. Figure 9
[0031] BRIEF DESCRIPTION OF DRAWINGS
[0032] 100a, 100b, 100c, 100d, P1, P2, P3, P4: projectors
[0033] 110: processor
[0034] 120: transmission module
[0035] 121, 410: antenna
[0036] 122: memory
[0037] 200: screen
[0038] 300: computer system
[0039] 310: graphic processor
[0040] 400: mobile device
[0041] IM, IM': projected image
[0042] IMa: projected overlapping area
[0043] IMb: projected non-overlapping area
[0044] HFov: horizontal field of view
[0045] VFov: vertical field of view
[0046] S101, S102, S103, S104, S201, S202: steps DETAILED DESCRIPTION
[0047] The following describes several embodiments of this disclosure with reference to the accompanying drawings. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit this disclosure. That is, these practical details are not essential in some embodiments of this disclosure. Furthermore, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simplified schematic manner.
[0048] Please refer to Figure 1 This is a flowchart illustrating a projector setting method according to an embodiment of this disclosure. Figure 1 As shown, the projector setup method includes steps S101 to S104. The details of these steps will be described below.
[0049] Step S101: Use a computer system to set a set of projection space parameters and a set of projector setup parameters for at least one projector.
[0050] Please refer to Figure 2 and Figure 3 . Figure 2 To illustrate an embodiment of the present disclosure, a computer system 300 (visible) is used. Figure 7 (A schematic diagram of the simulated screen during execution.) Figure 3 This is a schematic diagram illustrating a viewing frustum according to one embodiment of this disclosure. Figure 2 In the simulated image shown, four projectors, 100a, 100b, 100c, and 100d, project onto the same screen 200. It should be noted that projectors 100a, 100b, 100c, and 100d are virtual projectors running within computer system 300, and each corresponds to a specific virtual projector. Figure 9 The physical projectors are P1, P2, P3, and P4. According to step S101, the user can use the computer system 300 to set four sets of projection space parameters and four sets of projector setup parameters for the four projectors 100a, 100b, 100c, and 100d. It should be noted that, as... Figure 3 As shown, the projection geometry of the projected image is based on the exit pupil position of the projector 100a lens as the origin, and the projected horizontal field of view (HFov) and vertical field of view (VFov) are expanded into a viewing cone according to the aspect ratio of the projected image IM of the projector 100a and the throw ratio of the projection lens. The surfaces of objects within the viewing cone will be rendered as the projected image.
[0051] In some embodiments, the projector mounting parameters include at least one of the following: projector position parameters, projector mounting attitude parameters (e.g., elevation angle, azimuth angle, roll angle), lens field of view parameters, exit pupil distance parameters, and projection optical axis and lens shift parameters; however, this disclosure is not limited thereto. In practical applications, the projector mounting parameters can form a model view projection (MVP) matrix extended from the projection optical origin of projector 100a.
[0052] In some embodiments, the projection space parameters include the aspect ratio, width, and height of the screen 200, but this disclosure is not limited thereto.
[0053] Step S102: Execute the projection simulation program, which uses a computer system to perform calculations based on the set of projection space parameters and the set of projector setup parameters, and determines a set of setting parameters for the at least one projector.
[0054] like Figure 2 As shown, according to step S101, when the user executes the projection simulation program, the four sets of setting parameters for the four projectors 100a, 100b, 100c, and 100d can be determined by the computer system 300 based on the four sets of projection space parameters and the four sets of projector setup parameters, respectively.
[0055] In some embodiments, the setting parameters include at least one of lens focal length / focal length parameters, lens mount position parameters, and screen 200 setting parameters, but this disclosure is not limited thereto.
[0056] Please refer to Figure 4A as well as Figure 4B . Figure 4A This is a schematic diagram illustrating a projection simulation program executed by a computer system 300 according to an embodiment of this disclosure. Figure 4B for Figure 4A Another schematic diagram of the projection simulation program. (See diagram below.) Figure 4A As shown, the lens focal length / focal length parameter is adjusted to the minimum focal length, and combined with the displacement of the projection optical axis and lens offset, the position of the projected image IM is moved to the desired display area on the screen 200 (e.g., Figure 4A (The bottom right corner of screen 200). Or, as... Figure 4B As shown, the lens focal length / focal length parameter can be adjusted to the appropriate focal length so that the position of the projected image IM is perfectly matched with the screen 200.
[0057] It should be noted that when the projection optical axis is not perpendicular to the surface of the screen 200, the projected image will have trapezoidal distortion. Therefore, in some embodiments, the projector setting method may further include the following steps: executing a distortion correction calculation program, which uses the computer system 300 to generate a set of distortion parameters based on the set of projection space parameters and the screen 200 setting parameters in the set of setting parameters.
[0058] Please refer to Figure 5A as well as Figure 5B . Figure 5A This is a schematic diagram illustrating the process before a deformation correction calculation program is executed using a computer system 300 according to an embodiment of this disclosure. Figure 5B This diagram illustrates the result of a warp correction calculation performed by a computer system 300 according to an embodiment of this disclosure. In this embodiment, the computer system 300 is configured to allow the user to adjust the vertical or horizontal keystone correction angle and calculates the homography matrix for keystone correction on the image plane of the projector 100a (i.e., screen 200), which can be referred to as a warp simulation. Specifically, the user can use the computer system 300 to perform a homography matrix transformation based on the horizontal / vertical viewing angle of the target rendering point on screen 200, the image resolution of the projector 100a, and the projection viewing angle of the projector 100a to obtain new planar coordinates. Then, these new planar coordinates are restored to their original position before correction through formula transformation and inverse homography matrix transformation. The simulation result is as follows: Figure 5B As shown. In addition, if rotation simulation is used, the rotation angle can be corrected after trapezoidal correction, thereby compensating for the angular error after trapezoidal correction.
[0059] In some implementations, the user can also utilize the computer system 300 to simulate pincushion distortion or barrel distortion effects to create different image edge distortions for different wall surfaces (such as curved or cylindrical surfaces). Thus, a compensated, flat projected image IM can be seen on the non-planar screen 200.
[0060] In some implementations, the user can also use the computer system 300 to make corrections and fine adjustments to the four corners of the projected image IM through four-corner simulation, so that any misaligned or offset corners in the overlapping area between the projection range and the screen 200, or in the overlapping area of multiple projectors 100a, 100b, 100c, and 100d, can be corrected back to the desired alignment.
[0061] In some implementations, the user may also use the computer system 300 to perform linearity simulation. Linearity simulation is derived from the overall deformation simulation described above and corrects for asymmetry between the horizontal or vertical center lines, so that the projected image IM appears to be vertically and horizontally symmetrical.
[0062] By calculating the deformation parameters through these overall deformation simulations, users can immediately use these parameters, which are suitable for the installation site, after installing projectors P1, P2, P3, and P4 to eliminate image distortion problems.
[0063] It should be noted that the overlapping area IMa of the projected images IM from multiple projectors 100a, 100b, 100c, and 100d is visible. Figure 6A The overlapping area will appear brighter than the non-overlapping projection area (IMb) due to the sum of brightness, therefore a blending process must be performed on the rendering of the overlapping area. Blending simulation is performed using a computer system 300 (visible) Figure 7 The processing is performed within the pixel shader of the graphics processing unit 310 (GPU). Therefore, in some embodiments, the projector setting method may further include the following steps: calculating a projection overlap area based on projection space parameters of at least two of the projectors; and executing a blending calculation program that generates multiple sets of brightness reduction parameters based on the projection overlap area, wherein the multiple sets of brightness reduction parameters correspond to the at least two of the projectors respectively.
[0064] Please refer to Figure 6A as well as Figure 6B . Figure 6A This is a schematic diagram illustrating the process before a fusion computing program is executed using a computer system 300 according to one embodiment of this disclosure. Figure 6B This is a schematic diagram illustrating the execution of a fusion computing program using a computer system 300 according to an embodiment of this disclosure. For example... Figure 6A As shown, the overlapping projection area IMa formed by four projectors 100a, 100b, 100c, and 100d on screen 200 is an edge blending, which is the most common type of blending. The central portion of the overlapping projection area IMa is formed by the four projectors 100a, 100b, 100c, and 100d, while the other portions connecting the central portion are formed by two of each of the projectors 100a, 100b, 100c, and 100d. Specifically, when projecting onto the overlapping projection area IMa, the pixel shader of the graphics processor 310 within the computer system 300 uses the horizontal / vertical viewing angle of the target rendering point and the horizontal / vertical viewing angle of the overlapping projection area IMa to proportionally darken the projected image IM, making the total brightness the same as the non-overlapping projection area, thus obtaining the image shown. Figure 6BThe image shown is a projected image IM' processed by the pixel shader of the graphics processor 310.
[0065] Furthermore, considering the different deformation methods of multiple projectors 100a, 100b, 100c, and 100d, resulting in different blending area positions, the initial blending value can be calculated using the aforementioned overall deformation simulation calculation results to accommodate the different blending area positions on the four sides of each projector 100a, 100b, 100c, and 100d. Therefore, in some embodiments, the projector setting method may further include the following steps: executing a deformation correction calculation program, which uses a computer system to generate a set of deformation parameters based on the set of projection space parameters of at least one of the projectors and the screen setting parameters in the set of setting parameters; and calculating the initial blending value of the multiple sets of brightness reduction parameters based on the set of deformation parameters.
[0066] Furthermore, users can utilize a computer system to simulate black levels (300) to compensate for the dark colors in the non-overlapping projection area IMb. By simulating the potential brightness difference in dark areas caused by the overlapping projection area IMa, the brightness of the dark colors in the non-overlapping projection area IMb is increased in advance to achieve a uniform brightness in all dark areas. Therefore, in some embodiments, the projector setting method may further include the following steps: calculating the brightness difference in dark areas of the overlapping projection area IMa; and generating a set of dark area brightness compensation parameters based on the brightness difference.
[0067] By using the brightness reduction parameters, initial blending values, and dark area brightness compensation parameters calculated through these blending simulations, users can immediately use these parameters suitable for the installation site after installing projectors P1, P2, P3, and P4 to eliminate image splicing problems.
[0068] Step S103: Use computer system 300 to set a set of configuration parameters for the at least one projector, wherein the set of configuration parameters includes at least one of ID number and IP address.
[0069] Step S104: Store the set of configuration parameters and the set of setting parameters for the at least one projector to the mobile device.
[0070] Please refer to Figure 7 This is a schematic diagram illustrating a computer system 300 and a mobile device 400 according to an embodiment of this disclosure. (See reference numerals) Figure 7As can be seen from the above, according to the projector setting method of this embodiment, the projection simulation of projectors 100a, 100b, 100c, and 100d can be performed in the computer system 300 to pre-set the projector setup parameters, setting parameters, and configuration parameters of projectors 100a, 100b, 100c, and 100d, and the aforementioned parameters will then be transferred to the mobile device 400. Figure 7 In the embodiments shown, the mobile device 400 is a mobile phone, but this disclosure is not limited thereto.
[0071] Please refer to Figure 8 This is a flowchart illustrating a projector setting method according to another embodiment of this disclosure. Figure 8 As shown, the projector setup method includes steps S201 and S202. The details of these steps will be described below.
[0072] Step S201: Store multiple sets of configuration parameters and multiple sets of setting parameters to the mobile device, wherein the multiple sets of configuration parameters correspond to multiple sets of setting parameters respectively, and each of the multiple sets of configuration parameters includes at least one of an ID number and an IP address.
[0073] Please refer to Figure 9 This is a schematic diagram illustrating a mobile device 400 and multiple projectors P1, P2, P3, and P4 according to an embodiment of this disclosure. Figure 9 As shown, the mobile device 400 stores four sets of configuration parameters and four sets of setting parameters corresponding to up to multiple projectors P1, P2, P3, and P4, respectively. The four sets of configuration parameters correspond to the four sets of setting parameters, and each set of configuration parameters includes a unique ID number and IP address.
[0074] Step S202: Execute the data transmission procedure, which sequentially transmits multiple sets of configuration parameters and their corresponding multiple sets of setting parameters to multiple projectors via a mobile device.
[0075] In the data transmission process, for example, the user can transmit the first set of configuration parameters and the first set of setting parameters to projector P1, then transmit the second set of configuration parameters and the second set of setting parameters to projector P2, then transmit the third set of configuration parameters and the third set of setting parameters to projector P3, and finally transmit the fourth set of configuration parameters and the fourth set of setting parameters to projector P4.
[0076] In summary, users can plan the locations of multiple projectors 100a, 100b, 100c, and 100d within the computer system 300. Based on the desired projection method and environmental factors (e.g., screen 200, space limitations), the installation location and angle are determined through simulation. Next, each projector 100a, 100b, 100c, and 100d is assigned a unique ID number and IP address. These configuration parameters are then input into projectors P1, P2, P3, and P4 via mobile device 400, enabling projectors P1, P2, P3, and P4 to be paired with remote controls and controlled, and recognized by the computer system 300. Therefore, the projector setup method of this embodiment makes the setup process faster and more convenient.
[0077] Please refer to Figure 10 It is shown Figure 9 A schematic diagram of the mobile device 400 and a projector P1. (See diagram below.) Figure 10 As shown, specifically, the projector P1 includes a processor 110 and a transmission module 120. The transmission module 120 includes an antenna 121 and a memory 122. The mobile device 400 includes an antenna 410. The transmission module 120 and the mobile device 400 transmit data via antenna 121 and antenna 410, respectively. The processor 110 is configured to process the data received by the transmission module 120. In some embodiments, the aforementioned data transmission procedure is executed using near field communication (NFC) technology. When the projector P1 has just been unpacked and has no power input (i.e., the projector P1 is in a powered-off state), the user can transmit a set of configuration parameters and a set of setting parameters corresponding to the projector P1 to the memory 122 of the projector P1 through the self-powered characteristic of NFC.
[0078] In practical applications, data transmission procedures can also be executed using other wireless communication technologies or wired transmission technologies.
[0079] From the detailed description of the specific embodiments disclosed above, it is clear that in the projector setup method disclosed herein, the projection simulation of the projector can be performed in a computer system to pre-set the projector setup parameters, setting parameters, and configuration parameters, which are then transferred to a mobile device. When the projector is first unpacked, the relevant setting parameters can be written into the memory of the corresponding projector using the mobile device. After multiple projectors are individually installed and positioned, each projector can automatically import the simulation settings, thereby quickly establishing IP address pairing, site and projector lens position settings with the computer. Therefore, the projector setup method disclosed herein reduces manpower and time costs, thereby accelerating the installation and setup process of multiple projectors.
[0080] Although this disclosure has been described above with reference to embodiments, it is not intended to limit this disclosure. Any person skilled in the art may make various modifications and refinements without departing from the spirit and scope of this disclosure. Therefore, the scope of protection of this disclosure shall be determined by the scope of the appended claims.
Claims
1. A projector setting method, comprising: Use a computer system to set a set of projection space parameters and a set of projector setup parameters for at least one projector; The projection simulation program is executed, which uses the computer system to perform calculations based on the group of projection space parameters and the group of projector setup parameters, and determines a set of setting parameters for the at least one projector. The computer system is used to set a set of configuration parameters for the at least one projector, wherein the set of configuration parameters includes at least one of an ID number and an IP address; and The group configuration parameters and group setting parameters for the at least one projector are stored in the mobile device.
2. The projector setting method according to claim 1, wherein the projector setup parameters include at least one of the following: projector position parameters, projector mounting posture parameters, lens field of view parameters, exit pupil distance parameters, and projection optical axis and lens offset parameters.
3. The projector setting method according to claim 1, wherein the set setting parameters include at least one of lens focal length / focal length parameters, lens mount position parameters, and screen setting parameters.
4. The projector setting method according to claim 1, further comprising: The deformation correction calculation program is executed, which uses the computer system to generate a set of deformation parameters based on the set of projection space parameters and the screen setting parameters in the set of setting parameters.
5. The projector setting method according to claim 1, wherein the number of the at least one projector is a plurality of projects, and the projector setting method further comprises: The projection overlap area is calculated based on the multiple sets of projection spatial parameters of at least two of the plurality of projectors; and The program executes a fusion calculation procedure, which generates multiple sets of brightness reduction parameters based on the projection overlap area, wherein the multiple sets of brightness reduction parameters correspond to at least two of the multiple projectors.
6. The projector setting method according to claim 5, further comprising: The distortion correction calculation program is executed, which uses the computer system to generate a set of distortion parameters based on the set of projection space parameters of at least one of the plurality of projectors and the screen setting parameters in the set of setting parameters; and The initial value for the fusion of the multiple sets of brightness reduction parameters is calculated based on the set of deformation parameters.
7. The projector setting method according to claim 5, further comprising: Calculate the brightness difference in the dark areas of the projected overlapping region; and A set of dark area brightness compensation parameters is generated based on the difference in dark area brightness.
8. A projector setting method, comprising: Multiple sets of configuration parameters and multiple sets of setting parameters are stored in the mobile device, wherein the multiple sets of configuration parameters correspond to the multiple sets of setting parameters, and each of the multiple sets of configuration parameters includes at least one of an ID number and an IP address; and The data transmission procedure is executed, in which the mobile device sequentially transmits the multiple sets of configuration parameters and the corresponding multiple sets of setting parameters to multiple projectors.
9. The projector setting method according to claim 8, wherein the data transmission program is executed using near-field communication technology.
10. The projector setting method according to claim 8, wherein the plurality of projectors are in a powered-off state during the execution of the data transmission procedure.