Control method and projection device

Abstract

To appropriately change setting of an interface provided in a projection device when adjusting a mode of a projection image projected by the projection device by an application installed in a smartphone.SOLUTION: In the control method, a first mode in which the interface 120 is caused to function as a communication interface that receives a control signal for controlling the projection device 10 is executed when the first terminal 30 that controls the projection device 10 is connected to the interface 120 included in the projection device 10, and a second mode in which the interface 120 is caused to function as a source of an application image is executed when the second terminal 40 that executes an application for adjusting an aspect of a projection image is connected to the interface 120 included in the projection device 10.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a control method and a projection device. [Background technology]

[0002] Patent Document 1 discloses a display system including a computer and a projector connected to each other via a network such as a local area network (LAN), in which the computer can control the projector via the network. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-37542 Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, applications installed on smartphones are sometimes used to adjust the appearance of images displayed by projectors. Similar to the computer, smartphones are connected to projectors via a network. When adjusting the appearance of an image using an application, the application generates a pattern image or other image for adjusting the appearance of the image, which is then displayed by the projector. In this case, connecting a smartphone to the projector instead of a computer requires appropriate changes to the interface settings of the projector.

[0005] However, Patent Document 1 does not take into consideration changing the settings of the interface provided in the projector. [Means for solving the problem]

[0006] A control method according to one aspect of the present invention is a control method for a projection device that has an interface and projects a projection image onto a projection target, wherein when a first terminal device that controls the projection device via an access point is connected to the interface via the access point, the control method executes a first mode in which the interface functions as a communication interface that receives control signals for controlling the projection device, and when a second terminal device that runs an application for adjusting the aspect of the projection image is connected to the interface via the access point, the control method executes a second mode in which the interface functions as a source of an application image generated by the application, and in the first mode, the interface is configured not to function as a source of an image supplied from an external device to the projection device.

[0007] A projection device according to one aspect of the present invention is a projection device that includes an interface and one or more processors and projects a projection image onto a projection target, wherein the one or more processors execute a first mode in which, when a first terminal device that controls the projection device via an access point is connected to the interface via the access point, the interface functions as a communication interface that receives control signals for controlling the projection device, and a second mode in which, when a second terminal device that runs an application for adjusting the aspect of the projection image is connected to the interface via the access point, the interface functions as a source of an application image generated by the application, and in the first mode, the interface is configured not to function as a source of an image supplied to the projection device from an external device. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a block diagram showing an example of the configuration of a projection system 1. [Figure 2] FIG. 1 is a block diagram showing an example of the configuration of a projection device 10. [Figure 3] FIG. 4 is a functional block diagram showing the functions of a second execution unit 132. [Figure 4] FIG. 10 is a diagram showing an example of a message image MI1. [Figure 5] FIG. 3 is a sequence diagram showing the operation of the projection system 1. [Figure 6] FIG. 3 is a sequence diagram showing the operation of the projection system 1. [Figure 7] FIG. 3 is a sequence diagram showing the operation of the projection system 1. [Figure 8] FIG. 3 is a sequence diagram showing the operation of the projection system 1. [Figure 9] FIG. 3 is a sequence diagram showing the operation of the projection system 1. [Figure 10] FIG. 3 is a sequence diagram showing the operation of the projection system 1. [Figure 11] 3A and 3B are diagrams showing examples of message images MI projected onto a projection surface. [Figure 12] 3A and 3B are diagrams showing examples of message images MI projected onto a projection surface. [Figure 13] 3A and 3B are diagrams showing examples of message images MI projected onto a projection surface. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, in each drawing, the dimensions and scale of each part are appropriately different from those of the actual parts. Furthermore, since the embodiments described below are preferred specific examples of the present invention, various technically preferable limitations are applied, but the scope of the present invention is not limited to these embodiments unless otherwise specified in the following description to the effect that the present invention is limited.

[0010] 1: First embodiment 1-1: Configuration of the first embodiment The configuration of a projection system 1 according to the first embodiment will be described below with reference to FIGS.

[0011] 1-1-1: Overall structure 1 is a block diagram showing an example of the configuration of a projection system 1 according to the first embodiment. The projection system 1 includes a projection device 10, an access point 20, a first terminal device 30, and a second terminal device 40.

[0012] The projection device 10 projects a projection image such as a still image or a moving image onto a projection surface such as a screen or a wall under the control of a first terminal device 30 described below.

[0013] The access point 20 is a communication device for connecting the projection device 10, which serves as a wired LAN client, to a first terminal device 30 using a wired LAN standard. The access point 20 is also a communication device for connecting the projection device 10 to a second terminal device 40 using a wireless LAN standard such as Wi-Fi in addition to the wired LAN standard.

[0014] The first terminal device 30 is a control device that controls the projection device 10. A typical example of the first terminal device 30 is a PC (Personal Computer). The first terminal device 30 transmits a control signal for controlling the projection device 10 to the projection device 10 via the access point 20.

[0015] An application for adjusting the aspect of the projection image projected from the projection device 10 is installed in the second terminal device 40. A user of the projection system 1 adjusts the aspect of the projection image by having the second terminal device 40 execute the application. At this time, an image signal corresponding to the application image generated by the application is transmitted from the second terminal device 40 to the projection device 10 via the access point 20. The user of the projection system 1 adjusts the aspect of the projection image while viewing the application image projected onto a projection surface such as a screen or a wall.

[0016] 1, a projection device 10 and an access point 20 are connected by a wired LAN cable L1. A first terminal device 30 and the access point 20 are connected by a wired LAN cable L2. A second terminal device 40 and the access point 20 are connected by a wireless network L3, which is a wireless LAN.

[0017] The first terminal device 30 transmits the control signal to the projection device 10 via the LAN cable L2, the access point 20, and the LAN cable L1. The second terminal device 40 transmits the image signal to the projection device 10 via the wireless network L3, the access point 20, and the LAN cable L1.

[0018] 1, the projection device 10 and the access point 20 are connected by a wired LAN cable L1. However, the projection device 10 and the access point 20 may be connected by a wireless LAN. Furthermore, the first terminal device 30 and the access point 20 are connected by a wired LAN cable L2. However, the first terminal device 30 and the access point 20 may be connected by a wireless LAN.

[0019] 1-1-2: Projection device configuration 2 is a block diagram showing an example configuration of the projection device 10. The projection device 10 includes an optical device 110, an interface 120, a processing device 130, a storage device 140, and a communication device 150. The elements of the projection device 10 are connected to one another by one or more buses for communicating information. Furthermore, each element of the projection device 10 is composed of one or more devices, and some elements of the projection device 10 may be omitted.

[0020] The optical device 110 is a device that projects a projection image onto a projection surface such as a wall or a screen. The optical device 110 projects various projection images under the control of the processing device 130. The optical device 110 includes, for example, an illumination device, a liquid crystal panel, and a projection lens system, and modulates light from the illumination device using the liquid crystal panel. An original image of the projection image is drawn on the liquid crystal panel. The optical device 110 also projects the modulated light onto the projection surface via the projection lens system.

[0021] The processing device 130 is a processor that controls the entire projection device 10, and is composed of, for example, one or more chips. The processing device 130 is composed of, for example, a central processing unit (CPU) that includes an interface with peripheral devices, an arithmetic unit, and registers. Note that some or all of the functions of the processing device 130 may be realized by hardware such as a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA). The processing device 130 executes various processes in parallel or sequentially.

[0022] The interface 120 is an interface for wired communication. The connector and interface circuit for wired connection provided in the interface 120 may be compliant with wired LAN (Local Area Network), IEEE1394, and USB (Universal Serial Bus). As will be described below, the interface 120 also functions as a source of images provided from devices external to the projection device 10 .

[0023] The storage device 140 is a recording medium readable by the processing device 130, and stores a plurality of programs including the control program PR1 executed by the processing device 130. The storage device 140 may be configured by at least one of, for example, a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), and a random access memory (RAM). The storage device 140 may also be called a register, a cache, a main memory, a primary storage device, or the like.

[0024] The communication device 150 is hardware that functions as a transmitting / receiving device for communicating with other devices. The communication device 150 is also called, for example, a network device, a network controller, a network card, or a communication module. The communication device 150 includes a connector for wired connection. The connector corresponds to an interface circuit included in the interface 120. The communication device 150 may include an interface for wireless communication. Examples of the interface for wireless communication include interfaces that comply with wireless LAN, Bluetooth, etc. "Bluetooth" is a registered trademark.

[0025] The processing device 130 reads and executes the control program PR1 from the storage device 140, thereby functioning as a first execution unit 131, a second execution unit 132, a communication control unit 133, an aspect adjustment unit 134, and a projection control unit 135. The control program PR1 may be transmitted via a communication network from another device, such as a server that manages the projection device 10.

[0026] When the first terminal device 30 is connected to the interface 120 provided in the projection device 10 via the access point 20, the first execution unit 131 causes the interface 120 to function as a communication interface that receives control signals for controlling the projection device 10.

[0027] As a result, in FIG. 1, it becomes possible to transmit a control signal from the first terminal device 30 to the projection device 10 via the LAN cable L2, the access point 20, and the LAN cable L1.

[0028] In the first mode, the interface 120 is set so as not to function as a source of an image supplied from an external device to the projection device 10.

[0029] 2, when the second terminal device 40 is connected to the interface 120 of the projection device 10 via the access point 20, the second execution unit 132 causes the interface 120 to function as a source of an application image generated by an application installed in the second terminal device 40. As an example, the application is an application for adjusting the aspect of the projection image projected from the projection device 10.

[0030] As a result, in FIG. 1, it becomes possible to transmit an image signal from the second terminal device 40 to the projection device 10 via the wireless network L3, the access point 20, and the LAN cable L1.

[0031] 3 is a functional block diagram showing the functions of the second execution unit 132. The second execution unit 132 includes a first image projection unit 132[1], a reception unit 132[2], an initialization unit 132[3], a second image projection unit 132[4], and a connection release unit 132[5].

[0032] The first image projection unit 132[1] causes the optical device 110 to project a message image MI1 that asks whether or not to permit initialization of a plurality of setting values ​​that define the appearance of the projection image.

[0033] The “plurality of setting values” does not include setting values ​​corresponding to parameters used by the first terminal device 30 to control the projection device 10 . The parameter is a parameter that can be controlled by the first terminal device 30. The parameter is also an example of a “first parameter.” A setting value corresponding to the first parameter is an example of a “first setting value.”

[0034] Furthermore, the above-mentioned "plurality of setting values" includes setting values ​​corresponding to parameters used by the second terminal device 40 to define the appearance of the projection image projected by the projection device 10. The parameter is a parameter that can be adjusted by the application installed on the second terminal device 40. The parameter is also an example of a "second parameter." A setting value corresponding to the second parameter is an example of a "second setting value."

[0035] The second setting value includes, for example, at least one of a setting value related to the electronic zoom and electronic shift functions in the projection device 10, a setting value related to the brightness of the projection image projected from the projection device 10, and a setting value related to the dynamic contrast in the projection device 10.

[0036] Here, "electronic zoom" does not refer to a zoom function that changes the focal length using the optical device 110, but rather refers to enlarging the projected image itself. Specifically, it refers to increasing the size of the original image on the liquid crystal panel. Furthermore, "electronic shift" refers to shifting the position of the projected image electronically, rather than shifting the position of the projected image on the projection surface by the operation of the optical device 110. Specifically, it refers to changing the position of the original image on the liquid crystal panel.

[0037] Furthermore, "dynamic contrast" refers to the improved contrast ratio of the projected image when the contrast ratio of the projected image is improved by adding a brightness diaphragm mechanism to the lens portion of the optical device 110.

[0038] 4 is a diagram showing an example of a message image MI1 projected onto the projection surface. The message image MI1 includes a message M1 that asks the user whether or not to initialize the above-mentioned multiple setting values. The message image MI1 also includes a permission button YB that the user selects if they want to allow the initialization of the above-mentioned multiple setting values, and a rejection button NB that the user selects if they want to reject the initialization of the above-mentioned multiple setting values. The message image MI1 is an example of an application image generated by executing the above application on the second terminal device 40. The message image MI1 is also an example of a "confirmation image."

[0039] In FIG. 3, the reception unit 132[2] receives from the second terminal device 40, via an operation on the message image MI1, either a response that allows the initialization of the above-mentioned multiple setting values ​​or a response that denies the initialization of the above-mentioned multiple setting values.

[0040] 4, when the user permits the initialization of the plurality of setting values, the user selects the permission button YB included in the message image MI1 by operating the second terminal device 40. When the user selects the permission button YB, the receiving unit 132[2] receives a response from the second terminal device 40 permitting the initialization of the plurality of setting values.

[0041] On the other hand, if the user refuses to initialize the multiple setting values, the user selects the reject button NB included in the message image MI1 by operating the second terminal device 40. When the user selects the reject button NB, the reception unit 132[2] receives a response from the second terminal device 40 refusing to initialize the multiple setting values.

[0042] 3, when the receiving unit 132[2] receives a response permitting the initialization of the plurality of setting values, the initializing unit 132[3] initializes the plurality of setting values. Details of the initialization of the plurality of setting values ​​will be described later in the description of the operation of the projection system 1.

[0043] Furthermore, if the reception unit 132[2] receives a response permitting initialization of the above-mentioned multiple setting values, the second image projection unit 132[4] projects the above-mentioned application image onto the optical device 110 by using the interface 120 as the source of the application image.

[0044] An example of the application image will be described later with reference to FIG.

[0045] On the other hand, if the reception unit 132[2] receives a response refusing to initialize the above-mentioned multiple setting values, the disconnection unit 132[5] disconnects the interface 120 of the projection device 10 from the second terminal device 40 via the access point 20. Here, disconnecting the connection between the interface 120 and the second terminal device 40 means disconnecting their network connection. Therefore, even when the connection between the interface 120 and the second terminal device 40 is disconnected, the physical connection may remain established.

[0046] As an example, the connection release unit 132[5] disables the protocol that establishes the connection between the projection device 10 and the second terminal device 40.

[0047] The first mode executed by the first execution unit 131 and the second mode executed by the second execution unit 132 may be executed mutually exclusively.

[0048] Furthermore, as an example, the processing device 130 may function as either the first execution unit 131 or the second execution unit 132 depending on the type of data input to the interface 120 from an external device.

[0049] 2, a communication control unit 133 causes a communication device 150 to transmit and receive various types of information to and from the first terminal device 30, the second terminal device 40, and other external devices not shown in FIG.

[0050] The aspect adjustment unit 134 adjusts the aspect of the projection image projected onto a projection surface such as a screen or wall based on a correction value calculated by an application that adjusts the aspect of the projection image, which is executed on the second terminal device 40.

[0051] The projection control unit 135 causes the optical device 110 to project various projection images onto a projection surface such as a screen or a wall. As one example, the projection images may be projection images stored in the storage device 140. Alternatively, as another example, the projection images may be projection images supplied from the first terminal device 30. Alternatively, as another example, the projection images may be projection images supplied from another external device not shown in FIG. 1.

[0052] In this embodiment, the projection control unit 135 causes the optical device 110 to project various projection images onto a projection surface such as a screen or a wall in the manner adjusted by the manner adjustment unit .

[0053] By having the above configuration, the projection device 10, for example, when the OSD (On Screen Display) projected from the projection device 10 onto the projection surface does not display a case in which the interface 120 is used as a source of a video signal, when the application is installed in the second terminal device 40 and executed, it becomes possible to use the interface 120 as a source of a video signal.

[0054] When the projection device 10 executes the second mode, if the video source is switched while the projection device 10 is connected to the second terminal device 40, the projection device 10 prioritizes the switching of the video source. In other words, the projection device 10 uses the video supplied from the external device as the video source, rather than the application image transmitted from the second terminal device 40.

[0055] For example, if a user of the projection device 10 wants the projection device 10 to project an image supplied from an external device via HDMI (High-Definition Multimedia Interface), the user inputs an instruction to switch the image source to HDMI from the interface 120 connected to the second terminal device 40. In this case, the projection device 10 switches the image source to HDMI. Note that "HDMI" is a registered trademark.

[0056] 1-2: Operation of the first embodiment The operation of the projection system 1 according to the first embodiment will be described below with reference to Figs. 5 to 13. More specifically, the operation of the projection system 1 when the projection device 10 executes the second mode will be described below. Figs. 5 to 10 are sequence diagrams showing the operation of the projection system 1. Figs. 11 to 13 are diagrams showing examples of a message image MI projected onto the projection surface.

[0057] As a prerequisite for executing the operations of the projection system 1 shown in FIGS. 5 to 10, an application for adjusting the appearance of a projection image must be installed in the second terminal device 40. FIG. 11 shows an example of a message image MI2 projected onto the projection surface from the projection device 10 when the application is not installed in the second terminal device 40. The message image MI2 includes a message M2 that prompts the user of the projection system 1 to install the application. The message image MI2 also includes a first QR code C1 and a second QR code C2. The message image MI2 also includes a back button PB for transitioning the projection image projected onto the projection surface from the currently projected message image MI2 to the previous projection image, and a forward button XB for transitioning to the next screen. Note that "QR code" is a registered trademark.

[0058] If the second terminal device 40 is an iPhone, the user of the projection system 1 captures the first QR code C1 with an imaging device (not shown) provided in the second terminal device 40. If the second terminal device 40 is an Android terminal, the user of the projection system 1 captures the second QR code C2 with an imaging device (not shown) provided in the second terminal device 40. The user of the projection system 1 then downloads an application stored in the link destination indicated by the captured image, and installs the application in the second terminal device 40. Note that "iPhone" and "Android" are registered trademarks.

[0059] After the application is installed in the second terminal device 40, the user of the projection system 1 operates an input device (not shown) provided in the projection device 10 to select the proceed button XB.

[0060] When the application is installed in the second terminal device 40, a message image MI3, as shown in Fig. 12, is projected onto the projection surface from the projection device 10. The message image MI3 includes a message M3 that prompts the user of the projection system 1 to start the application. The message image MI3 also includes a cancel button CB1 that stops the projection of the message image MI3.

[0061] A message image MI2 illustrated in FIG. 11 and a message image MI3 illustrated in FIG.

[0062] 5, the control module CM and projection library PL provided in the second terminal device 40 are software modules provided in the above-mentioned application. The control module CM is a software module that controls the operation of the above-mentioned application. The projection library PL is a library for connecting and disconnecting between the second terminal device 40 and the projection device 10, and for sending and receiving image data, etc.

[0063] In step S1, the control module CM outputs a projector search request, which is a request to search for a projector, to the projection library PL. The projector search request is input from the control module CM to the projection library PL.

[0064] In step S2, the projection library PL transmits the above-mentioned projector search request to the projection device 10. The processing device 130 provided in the projection device 10 functions as a communication control unit 133. The processing device 130 receives the above-mentioned projector search request from the second terminal device 40.

[0065] In step S3, the processing device 130 included in the projection device 10 functions as a communication control unit 133. The processing device 130 transmits the projector search result indicating that the projection device 10 has been detected to the second terminal device 40. The projection library PL included in the second terminal device 40 receives the projector search result from the second terminal device 40.

[0066] In step S4, the projection library PL outputs the projector search results to the control module CM, which receives the projector search results from the projection library PL.

[0067] In step S5, the control module CM outputs a projector connection request to the projection library PL, which is a connection request to the projection device 10 indicated by the projector search result received in step S4. The projector connection request is input to the projection library PL from the control module CM.

[0068] In step S6, the projection library PL transmits the above-mentioned projector connection request to the projection device 10. The processing device 130 provided in the projection device 10 functions as a communication control unit 133. The processing device 130 receives the above-mentioned projector connection request from the second terminal device 40. As a result, the second terminal device 40 and the projection device 10 are connected via the wireless network L3, the access point 20, and the LAN cable L1 shown in FIG. 1.

[0069] In step S7, the processing device 130 included in the projection device 10 functions as a communication control unit 133. The processing device 130 transmits a projector connection response indicating that the second terminal device 40 and the projection device 10 have been connected to the second terminal device 40. The projection library PL included in the second terminal device 40 receives the projector connection response from the projection device 10.

[0070] In step S8, the projection library PL outputs the above projector connection response to the control module CM, which receives the above projector connection response from the projection library PL.

[0071] After step S8, the projection device 10 projects a message image MI4 shown in FIG. 13 onto the projection surface. The message image MI4 includes a message M4 indicating that connection has been established with the second terminal device 40. The message image MI4 also includes a cancel button CB2 for interrupting the connection between the projection device 10 and the second terminal device 40. The message image MI4 is an image generated by an application installed on the second terminal device 40. In FIG. 1, the message image MI4 generated by the second terminal device 40 is transmitted to the projection device 10 via the wireless network L3, the access point 20, and the LAN cable L1. At this time, the interface 120 of the projection device 10 functions as the source of the message image MI4 generated by the application.

[0072] 6 and 7 are processes for resetting the current setting values. Before executing step S9, the projection device 10 projects the message image MI1 shown in Fig. 4 onto the projection surface. While the projection device 10 is projecting the message image MI1, if the reception unit 132[2] receives a response permitting the initialization of the multiple setting values, the processes from step S9 onwards are executed.

[0073] In step S9, the control module CM transmits a first initialization request to the projection device 10 to request initialization of curvature correction. Here, "curvature correction" refers to correcting a projection image so that it is not distorted when the projection image is projected onto a curved projection surface, even when the projection image is directly facing the curved projection surface. Also, "initialization of curvature correction" refers to resetting the curvature correction function. The processing device 130 provided in the projection device 10 functions as a communication control unit 133. The processing device 130 receives the first initialization request from the second terminal device 40.

[0074] Furthermore, the processing device 130 provided in the projection device 10 functions as an initialization unit 132[3]. The processing device 130 initializes the curvature correction.

[0075] In step S10, the processing device 130 included in the projection device 10 functions as a communication control unit 133. The processing device 130 transmits a first initialization response to the second terminal device 40 to notify that the curvature correction has been initialized. The control module CM included in the second terminal device 40 receives the first initialization response from the second terminal device 40.

[0076] In step S11, the control module CM transmits a second initialization request to the projection device 10 to request initialization of point correction. Here, "point correction" refers to correcting points arranged in a grid pattern to adjust a distorted projection surface or blending. Also, "initialization of point correction" refers to resetting the point correction function. The processing device 130 provided in the projection device 10 functions as a communication control unit 133. The processing device 130 receives the second initialization request from the second terminal device 40.

[0077] The processing device 130 provided in the projection device 10 also functions as an initialization unit 132[3]. The processing device 130 initializes point correction.

[0078] In step S12, the processing device 130 included in the projection device 10 functions as the communication control unit 133. The processing device 130 transmits a second initialization response to the second terminal device 40 to notify that the point correction has been initialized. The control module CM included in the second terminal device 40 receives the second initialization response from the second terminal device 40.

[0079] In step S13, the control module CM transmits a third initialization request to the projection device 10, requesting initialization of corner correction. Here, "corner correction" refers to correcting a projected image so that all four corners of the image fit within the projection surface when the projected image is distorted in at least one of the vertical and horizontal directions and has become a trapezoid. Also, "initialization of corner correction" refers to resetting the corner correction function. The processing device 130 provided in the projection device 10 functions as a communication control unit 133. The processing device 130 receives the third initialization request from the second terminal device 40.

[0080] The processing device 130 provided in the projection device 10 also functions as an initialization unit 132[3]. The processing device 130 initializes the corner correction.

[0081] In step S14, the processing device 130 included in the projection device 10 functions as the communication control unit 133. The processing device 130 transmits a third initialization response to the second terminal device 40 to notify that the corner correction has been initialized. The control module CM included in the second terminal device 40 receives the third correction initialization response from the second terminal device 40.

[0082] In step S15, the control module CM transmits a fourth initialization request to the projection device 10 to request initialization of the electronic zoom and electronic shift. Here, "initialization of the electronic zoom and electronic shift" means resetting the functions of the electronic zoom and electronic shift. The processing device 130 provided in the projection device 10 functions as a communication control unit 133. The processing device 130 receives the fourth initialization request from the second terminal device 40.

[0083] The processing device 130 provided in the projection device 10 also functions as an initialization unit 132[3]. The processing device 130 initializes the electronic zoom and electronic shift.

[0084] In step S16, the processing device 130 included in the projection device 10 functions as the communication control unit 133. The processing device 130 transmits a fourth initialization response to the second terminal device 40, notifying the second terminal device 40 that the electronic zoom and electronic shift have been initialized. The control module CM included in the second terminal device 40 receives the fourth initialization response from the second terminal device 40.

[0085] In step S17, the control module CM transmits a fifth initialization request to the projection device 10 to request initialization of brightness. Here, "initialization of brightness" means setting the brightness of the projection image to the maximum value. The processing device 130 provided in the projection device 10 functions as a communication control unit 133. The processing device 130 receives the fifth initialization request from the second terminal device 40.

[0086] Furthermore, the processing device 130 provided in the projection device 10 functions as an initialization unit 132[3]. The processing device 130 initializes the brightness of the projection image.

[0087] In step S18, the processing device 130 included in the projection device 10 functions as the communication control unit 133. The processing device 130 transmits a fifth initialization response to the second terminal device 40 to notify the second terminal device 40 that the brightness has been initialized. The control module CM included in the second terminal device 40 receives the fifth initialization response from the second terminal device 40.

[0088] In step S19, the control module CM transmits a sixth initialization request to the projection device 10 to request initialization of the dynamic contrast. Here, "initialization of the dynamic contrast" means setting a limit on the dynamic contrast. The processing device 130 provided in the projection device 10 functions as a communication control unit 133. The processing device 130 receives the sixth initialization request from the second terminal device 40.

[0089] The processing device 130 provided in the projection device 10 also functions as an initialization unit 132[3]. The processing device 130 initializes the dynamic contrast.

[0090] In step S20, the processing device 130 included in the projection device 10 functions as the communication control unit 133. The processing device 130 transmits a sixth initialization response to the second terminal device 40 to notify the second terminal device 40 that the dynamic contrast has been initialized. The control module CM included in the second terminal device 40 receives the sixth initialization response from the second terminal device 40.

[0091] Steps S21 to S28 shown in Fig. 8 are processes from creating a first pattern to analyzing the first pattern projected from the projection device 10. Here, the first pattern is a pattern image projected from the projection device 10 in order to calculate a correction value for correcting the projected image. The pattern image is, for example, a checkered image or a checkered image. When the first pattern is compared with a second pattern described below, the first pattern is a coarser image than the second pattern. Both the first pattern and the second pattern are application images generated by the above-mentioned application installed in the second terminal device 40.

[0092] In step S21, the control module CM creates a first pattern.

[0093] In step S22, the control module CM outputs the first pattern created in step S21 to the projection library PL. The first pattern is input from the control module CM to the projection library PL.

[0094] In step S23, the projection library PL transmits the first pattern to the projection device 10. The processing device 130 provided in the projection device 10 functions as a communication control unit 133. The processing device 130 receives the first pattern from the second terminal device 40.

[0095] In step S24, the processing device 130 provided in the projection device 10 functions as the second image projection unit 132[4]. The processing device 130 causes the optical device 110 to project the first pattern onto the projection surface.

[0096] In step S25, the processing device 130 included in the projection device 10 functions as the communication control unit 133. The processing device 130 transmits a first projection response notifying the second terminal device 40 that the first pattern has been projected. The projection library PL receives the first projection response from the projection device 10.

[0097] In step S26, the projection library PL outputs the first projection response to the control module CM, which receives the first projection response from the projection library PL.

[0098] In step S27, the control module CM uses an imaging device (not shown) provided in the second terminal device 40 to capture an image of the first pattern projected onto the projection surface by the projection device 10.

[0099] In step S28, the control module CM analyzes the imaging result of the first pattern imaged in step S27, and calculates a correction value based on the result of the analysis.

[0100] Steps S29 to S36 shown in FIG. 9 are the processes from creating the second pattern to analyzing the second pattern projected from the projection device 10.

[0101] In step S29, the control module CM creates a second pattern.

[0102] In step S30, the control module CM outputs the second pattern created in step S29 to the projection library PL. The second pattern is input from the control module CM to the projection library PL.

[0103] In step S31, the projection library PL transmits the second pattern to the projection device 10. The processing device 130 provided in the projection device 10 functions as a communication control unit 133. The processing device 130 receives the second pattern from the second terminal device 40.

[0104] In step S32, the processing device 130 provided in the projection device 10 functions as a second image projection unit 132[4]. The processing device 130 causes the optical device 110 to project a second pattern onto the projection surface.

[0105] In step S33, the processing device 130 included in the projection device 10 functions as the communication control unit 133. The processing device 130 transmits a second projection response notifying the second terminal device 40 that the second pattern has been projected. The projection library PL receives the second projection response from the projection device 10.

[0106] In step S34, the projection library PL outputs the second projection response to the control module CM, which receives the second projection response from the projection library PL.

[0107] In step S35, the control module CM uses an imaging device (not shown) provided in the second terminal device 40 to capture an image of the second pattern projected onto the projection surface by the projection device 10.

[0108] In step S36, the control module CM analyzes the imaging result of the second pattern imaged in step S35, and calculates a correction value based on the result of this analysis.

[0109] In step S37, the control module CM transmits the correction values ​​calculated in steps S28 and S36 to the projection device 10. The processing device 130 provided in the projection device 10 functions as a communication control unit 133. The processing device 130 receives the correction values ​​from the second terminal device 40.

[0110] In step S38, the processing device 130 included in the projection device 10 functions as the aspect adjustment unit 134. The processing device 130 adjusts the aspect of the projection image based on the correction value received in step S37. As an example, the processing device 130 adjusts the position of a corner of the projection image.

[0111] In step S39, the processing device 130 included in the projection device 10 functions as the communication control unit 133. The processing device 130 transmits an aspect adjustment response to the second terminal device 40 to notify the second terminal device 40 that the aspect of the projection image has been adjusted. The control module CM included in the second terminal device 40 receives the aspect adjustment response from the projection device 10.

[0112] 2: Variation The above embodiments can be modified in various ways. Specific modified embodiments are exemplified below. The embodiments exemplified below and the embodiments described above can be combined as appropriate within the scope of not mutually contradicting each other. Note that for elements in the modified embodiments exemplified below that have the same actions and functions as the embodiments, the reference numerals referenced in the above explanation will be used and detailed explanations of each element will be omitted as appropriate.

[0113] 2-1: Variation 1 In the above embodiment, the above "multiple setting values" do not include setting values ​​corresponding to parameters used by the first terminal device 30 to control the projection device 10, but include setting values ​​corresponding to parameters used by the second terminal device 40 to define the appearance of the projection image projected by the projection device 10.

[0114] However, the above-mentioned "multiple setting values" may include both setting values ​​corresponding to parameters used by the first terminal device 30 to control the projection device 10 and setting values ​​corresponding to parameters used by the second terminal device 40 to define the appearance of the projection image projected by the projection device 10.

[0115] As an example, after the projection device 10 and the second terminal device 40 are connected, the second execution unit 132 may initialize the settings corresponding to parameters used by the first terminal device 30 to control the projection device 10. The settings may include, for example, a color mode and a color temperature.

[0116] 2-2: Variation 2 In the above embodiment, the parameters used by the first terminal device 30 to control the projection device 10 may be the same as or different from the parameters adjustable by the above application installed on the second terminal device 40.

[0117] 3: Summary of this disclosure A summary of this disclosure is provided below.

[0118] (Appendix 1) A control method for a projection device that has an interface and projects a projection image onto a projection target, the control method comprising: when a first terminal device that controls the projection device via an access point is connected to the interface via the access point, executing a first mode that causes the interface to function as a communication interface that receives control signals for controlling the projection device; when a second terminal device that runs an application for adjusting the aspect of the projection image is connected to the interface via the access point, executing a second mode that causes the interface to function as a source of an application image generated by the application; and in the first mode, the interface is configured not to function as a source of an image supplied from an external device to the projection device.

[0119] The control method of this embodiment has the above-mentioned configuration, and when adjusting the aspect of the projection image projected by the projection device 10 using an application installed on the second terminal device 40, which is, for example, a smartphone, it is possible to appropriately change the settings of the interface 120 provided in the projection device 10.

[0120] More specifically, the control method described above allows the interface 120, which does not function as an image source in the first mode, to function as an image source in the second mode. This makes the control method applicable to both cases where the first terminal device 30 controls the projection device 10 via a network and where the projection image is adjusted using an application image generated by an application on the second terminal device 40.

[0121] (Appendix 2) The control method of Appendix 1, wherein executing the second mode includes initializing a plurality of setting values ​​that define the appearance of the projected image and are set in the projection device before starting to adjust the appearance of the projected image by the application.

[0122] The control method of this embodiment has the above-mentioned configuration, and therefore can save the user the trouble of performing initialization by initializing multiple setting values ​​before adjusting the aspect of the projected image using an application installed on the second terminal device 40.

[0123] (Appendix 3) The control method of Appendix 2, wherein the plurality of setting values ​​does not include a first setting value corresponding to a first parameter controllable by the first terminal device, and includes a second setting value corresponding to a second parameter adjustable by the application.

[0124] The control method of this embodiment has the above configuration, and thus can prevent the first setting value previously set by the first terminal device 30 from being initialized.

[0125] (Appendix 4) The control method of Appendix 2 or Appendix 3, wherein executing the second mode includes, before initializing the plurality of setting values, having an optical device provided in the projection device project a confirmation image to confirm whether or not to allow initialization of the plurality of setting values, and accepting, via the confirmation image, either a response allowing initialization of the plurality of setting values ​​or a response denying initialization of the plurality of setting values.

[0126] The control method of this embodiment has the above configuration, allowing the user to select whether or not to initialize a plurality of setting values.

[0127] (Appendix 5) The control method of claim 4, wherein executing the second mode includes, when a response allowing initialization of the plurality of setting values ​​is received via the confirmation image, projecting the application image onto the optical device using the interface as a source of the application image, and when a response denying initialization of the plurality of setting values ​​is received via the confirmation image, disconnecting the projection device from the second terminal device via the interface and the access point.

[0128] The control method of this embodiment has the above configuration, and can therefore execute an appropriate control method according to the content of the answer given via the confirmation image.

[0129] (Appendix 6) A projection device that projects a projection image onto a projection target, comprising an interface and one or more processors, wherein the one or more processors execute two modes: a first mode in which, when a first terminal device that controls the projection device via an access point is connected to the interface via the access point, the interface functions as a communication interface that receives control signals for controlling the projection device; and a second mode in which, when a second terminal device that runs an application for adjusting aspects of the projection image is connected to the interface via the access point, the interface functions as a source of an application image generated by the application; and in the first mode, the interface is configured not to function as a source of an image supplied to the projection device from an external device.

[0130] The projection device 10 of this embodiment has the above-mentioned configuration, so that when adjusting the aspect of the projection image projected by the projection device 10 using an application installed on the second terminal device 40, it is possible to appropriately change the settings of the interface 120 provided in the projection device 10.

[0131] More specifically, the projection device 10 can cause the interface 120, which does not function as an image source in the first mode, to function as an image source in the second mode. This makes the control method applicable to both cases where the projection device 10 is controlled by the first terminal device 30 via a network and where the projection image is adjusted using an application image generated by an application on the second terminal device 40. [Explanation of symbols]

[0132] 1: projection system, 10: projection device, 20: access point, 30: first terminal device, 40: second terminal device, 110: optical device, 120: interface, 130: processing device, 131: first execution unit, 132: second execution unit, 132[1]: first image projection unit, 132[2]: reception unit, 132[3]: initialization unit, 132[4]: connection release unit, 132[5]: second image projection unit, 133: communication control unit, 134: aspect adjustment unit, 135: projection control unit, 140: storage device, 150: communication device, C1: first QR code, C2: second QR code, CB1: Cancel button, CB2: Cancel button, CM: Control module, L1: LAN cable, L2: LAN cable, L3: Wireless network, M1: Message, M2: Message, M3: Message, M4: Message, MI: Message image, MI1: Message image, MI2: Message image, MI3: Message image, MI4: Message image, NB: Reject button, PB: Reverse button, PL: Projection library, PR1: Control program, XB: Proceed button, YB: Allow button

Claims

1. A control method for a projection device that includes an interface and projects a projection image onto a projection target, comprising: When a first terminal device that controls the projection device via an access point is connected to the interface via the access point, a first mode is executed in which the interface functions as a communication interface that receives a control signal for controlling the projection device; When a second terminal device that executes an application for adjusting aspects of the projection image is connected to the interface via the access point, the second terminal device executes a second mode that causes the interface to function as a source of an application image generated by the application; A control method according to claim 1, wherein in the first mode, the interface is configured not to function as a source of an image supplied from an external device to the projection device.

2. 2. The control method according to claim 1, wherein executing the second mode includes initializing a plurality of setting values ​​that are set in the projection device and that define aspects of the projected image before starting to adjust aspects of the projected image by the application.

3. 3. The control method of claim 2, wherein the plurality of setting values ​​does not include a first setting value corresponding to a first parameter controllable by the first terminal device, and includes a second setting value corresponding to a second parameter adjustable by the application.

4. Executing the second mode includes: before initializing the plurality of setting values, projecting a confirmation image by an optical device included in the projection device to confirm whether or not to allow initialization of the plurality of setting values; receiving, via the confirmation image, either a response to allow initialization of the plurality of setting values ​​or a response to deny initialization of the plurality of setting values; The control method according to claim 2 or 3, comprising:

5. Executing the second mode includes: When a response permitting initialization of the plurality of setting values ​​is received via the confirmation image, the application image is projected onto the optical device using the interface as a source of the application image.

5. The control method according to claim 4, further comprising: when a response refusing to initialize the plurality of setting values ​​is received via the confirmation image, disconnecting the projection device from the second terminal device via the interface and the access point.

6. A projection device that projects a projection image onto a projection target, the projection device comprising: an interface; and one or more processors, the one or more processors: a first mode in which, when a first terminal device that controls the projection device via an access point is connected to the interface via the access point, the interface functions as a communication interface that receives a control signal for controlling the projection device; a second mode in which, when a second terminal device running an application for adjusting aspects of the projection image is connected to the interface via the access point, the interface functions as a source of an application image generated by the application; Run In the first mode, the interface is configured not to function as a source of an image supplied from an external device to the projection device.

Images