Display system, projector, and program

Abstract

To shorten the time since a projector receives operation to log in to an external server until the projector displays a log-in screen.SOLUTION: A display system comprises: a projector including one or more processors that instruct an optical device to display a drawing screen; and a communication device that is connected to the first video input terminal of the projector. When receiving an instruction signal from the processors, the communication device acquires, from the external server, log-in screen data indicating a log-in screen for logging in to the external server. In a state where the drawing screen is displayed after transmitting the instruction signal to the communication device, the processors set the state of the first video input terminal to an active state, and when receiving log-in operation for logging in to the external server after setting the state of the first video input terminal to the active state, instructs the optical device to display the log-in screen based on the log-in screen data.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a display system, a projector, and a program. [Background technology]

[0002] Patent document 1 discloses a projector that includes a drawing unit that generates a drawn image according to the position of a pointer, a display unit that displays a display image supplied from an external device and the drawn image on a display surface, and a memory unit that stores the drawn image displayed on the display surface when the display image was displayed on the display surface. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-173675 A Summary of the Invention [Problem to be solved by the invention]

[0004] In some cases, an online server such as a cloud drive is selected as a storage device for storing a drawn image, instead of the storage unit of the projector. In this case, a communication device capable of accessing the online server via a network is connected to the projector. In order to display a login screen for logging in to the online server by the projector, it is necessary to set the image source of the projector to the communication device. However, depending on the timing of setting the communication device to the image source, it may take a long time for the projector to display the login screen after accepting an operation for logging in to the server. [Means for solving the problem]

[0005] A display system according to one embodiment of the present invention comprises a projector including an optical device for displaying an image on a display surface and one or more processors for instructing the optical device to display a drawing screen for drawing an object based on position information of a pointer, and a communication device having an operating system for controlling communications and connected to a first video input terminal of the projector, wherein the communication device is connected via a network to an external server that provides an online storage service for saving the drawing screen, and when an instruction signal is received from the one or more processors, the communication device acquires login screen data from the external server indicating a login screen into which authentication information for logging in to the external server is input, and after sending the instruction signal to the communication device, the one or more processors set a state of the first video input terminal to an active state for accepting the login screen data output from the communication device while the drawing screen is displayed, and after setting the state of the first video input terminal to the active state, when a login operation for logging in to the external server is received, instructs the optical device to display the login screen based on the login screen data on the display surface.

[0006] A projector according to one embodiment of the present invention comprises an optical device that displays an image on a display surface, one or more processors that instruct the optical device to display a drawing screen for drawing an object based on position information of a pointer, and a first video input terminal connected to a communication device that is connected via a network to an external server that provides an online storage service for saving the drawing screen, wherein after sending an instruction signal to the communication device, the one or more processors set a state of the first video input terminal to an active state that accepts login screen data indicating a login screen output from the communication device and into which authentication information for logging in to the external server is input, while the drawing screen is displayed, and after setting the state of the first video input terminal to the active state, when a login operation for logging in to the external server is received, instruct the optical device to display the login screen based on the login screen data on the display surface.

[0007] A program of one embodiment of the present invention causes a computer to execute the following steps: instruct an optical device to display on a display surface a drawing screen for drawing an object based on position information of a pointer; after sending an instruction signal to a communication device connected to a first video input terminal, while the drawing screen is displayed, set a state of the first video input terminal to an active state for accepting login screen data indicating a login screen output from the communication device and into which authentication information for logging in to an external server is input; and after setting the state of the first video input terminal to the active state, when a login operation for logging in to the external server is accepted, instruct the optical device to display the login screen based on the login screen data on the display surface. [Brief description of the drawings]

[0008] [Figure 1] 1 is a diagram illustrating a schematic configuration of a display system according to an embodiment of the present invention. [Diagram 2] FIG. 1 is a block diagram illustrating a schematic configuration of a projector. [Diagram 3] FIG. 2 is a diagram showing an example of a drawing screen. [Figure 4] FIG. 2 is a diagram showing an example of a drawing screen on which an object is drawn in a first area. [Diagram 5] 4 is a sequence chart showing the operations of the projector and the communication device. [Figure 6] FIG. 13 is a diagram showing an example of a drawing screen on which a menu image is displayed. [Figure 7] FIG. 13 is a diagram showing an example of a drawing screen on which a save destination list image is displayed. [Figure 8] FIG. 13 is a diagram showing an example of a login screen displayed alongside a drawing screen. [Figure 9] FIG. 13 is a diagram showing an example of a drawing screen on which an attribute editing image is displayed. [Figure 10] FIG. 13 is a diagram showing an example of a drawing screen displayed alongside an attribute editing image instead of the login screen. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. In the drawings, the dimensions of the components may be shown on different scales in order to make the components easier to see.

[0010] 1 is a diagram illustrating a schematic configuration of a display system 1 according to the present embodiment. As illustrated in FIG. 1, the display system 1 includes a projector 10, a pointer 20, a light-emitting device 30, and a communication device 40.

[0011] The projector 10 displays an image based on image data on a screen SC. For example, the projector 10 is fixed to a wall surface (not shown). The screen SC is installed below the projector 10. The screen SC is an example of a display surface on which an image is displayed by the projector 10. Instead of the screen SC, a wall surface may be used as the display surface. In this case, the projector 10 displays an image based on image data on the wall surface.

[0012] The projector 10 displays on the screen SC a drawing screen WB for drawing an object based on position information of the electronic pen 20 or the user's finger F. As will be described later, drawing screen data, which is image data showing the drawing screen WB, is stored in advance in the storage device 170 of the projector 10. The projector 10 displays on the screen SC the drawing screen WB based on the drawing screen data.

[0013] FIG. 2 is a diagram showing an example of a drawing screen WB. As shown in FIG. 2, the drawing screen WB is a rectangular image. The drawing screen WB includes a first area W1 which is a white area, and a second area W2 which is an area for displaying the toolbar TB. The toolbar TB is disposed at the bottom end of the drawing screen WB and extends in the horizontal direction of the drawing screen WB. The toolbar TB includes a menu display icon C1 which is an operation icon for instructing to display a menu. The toolbar TB includes a plurality of operation icons (not shown) other than the menu display icon C1.

[0014] The first area W1 is an area inside the drawing screen WB other than the second area W2. The first area W1 is larger than the second area W2. The projector 10 has a drawing function for drawing objects such as lines, characters, and figures in the first area W1 of the drawing screen WB based on position information of the electronic pen 20 or the user's finger F. In this way, the drawing screen WB is used as an electronic whiteboard.

[0015] Returning to Figure 1, we will continue with the explanation below. The electronic pen 20 is a pointing device used by a user to operate a GUI (Graphical User Interface) displayed on the screen SC or to draw an object in a first area W1 of the drawing screen WB. The electronic pen 20 has a function of emitting infrared light from its pen tip in synchronization with a synchronization signal transmitted from a synchronization device 130 of the projector 10.

[0016] As will be described in more detail below, the projector 10 has the function of capturing infrared light emitted from the electronic pen 20 with a first camera 140 and a second camera 150, and acquiring position information of the electronic pen 20 based on the captured images obtained from the first camera 140 and the second camera 150.

[0017] The light-emitting device 30 is disposed between the projector 10 and the screen SC, and emits diffused infrared light downward within a range of angle θ. The infrared light emitted from the light-emitting device 30 forms a layer of light along the screen SC. In this embodiment, the angle θ reaches approximately 180 degrees, and the layer of light is formed over almost the entire screen SC. It is preferable that the surface of the screen SC and the layer of light formed by the light-emitting device 30 are close to each other. The timing of emission of infrared light from the light-emitting device 30 is controlled by the processor 180 of the projector 10.

[0018] Although details will be described later, the projector 10 has a function of capturing reflected light generated when infrared light emitted from the light-emitting device 30 is reflected by the user's finger F with the first camera 140 and the second camera 150, and acquiring position information of the user's finger F based on the captured images obtained from the first camera 140 and the second camera 150. The electronic pen 20 and the user's finger F are examples of a pointer.

[0019] The communication device 40 has an operating system for controlling communication, and is connected to a first video input terminal 11 of the projector 10. The first video input terminal 11 is one of a plurality of video input terminals that the projector 10 has. In this embodiment, the first video input terminal 11 is an HDMI (High-Definition Multimedia Interface: registered trademark) terminal. In other words, the communication device 40 is connected to the first video input terminal 11 of the projector 10 via an HDMI cable.

[0020] The communication device 40 is connected to external servers 50 and 60 that provide an online storage service for saving the drawing screen WB via a network NW. The communication device 40 accesses the network NW by wireless communication. For example, the network NW is the Internet, and the external servers 50 and 60 are each a cloud drive. In the following description, the external server 50 may be referred to as the "first cloud drive 50," and the external server 60 may be referred to as the "second cloud drive 60."

[0021] The first cloud drive 50 and the second cloud drive 60 are cloud drives that can be accessed by a web browser. The communication device 40 accesses the first cloud drive 50 and the second cloud drive 60 by launching the web browser.

[0022] The communication device 40 transmits image data acquired from the first cloud drive 50 to the projector 10 via an HDMI cable. For example, the image data acquired from the first cloud drive 50 is image data showing images such as a login screen where authentication information for logging in to the first cloud drive 50 is input and a home screen of the online storage service provided by the first cloud drive 50.

[0023] Furthermore, the communication device 40 transmits image data acquired from the second cloud drive 60 to the projector 10 via an HDMI cable. For example, the image data acquired from the second cloud drive 60 is image data showing images such as a login screen where authentication information for logging in to the second cloud drive 60 is input, and a home screen of an online storage service provided by the second cloud drive 60.

[0024] The projector 10 has a function of displaying an image based on image data transmitted from the communication device 40 on the screen SC as described above. The projector 10 also has an online storage function of storing the drawing screen WB in at least one of the first cloud drive 50 and the second cloud drive 60 via the communication device 40.

[0025] Note that the communication device 40 may be connected to the projector 10 not only via an HDMI cable, but also via a Universal Serial Bus (USB) cable and a communication cable that complies with a power-supplying communication standard such as USB-Type C. In this case, a power supply voltage can be supplied from the projector 10 to the communication device 40, and communication of signals other than video signals including image data can be performed between the projector 10 and the communication device 40.

[0026] Hereinafter, the configuration of the projector 10 will be described in detail with reference to FIG. Fig. 3 is a block diagram showing a schematic configuration of the projector 10. As shown in Fig. 3, the projector 10 includes an optical device 110, an input device 120, a synchronization device 130, a first camera 140, a second camera 150, a video interface device 160, a storage device 170, and a processor 180.

[0027] The optical device 110 displays an image on the screen SC in accordance with an instruction from the processor 180. More specifically, the optical device 110 generates image light L representing an image in accordance with an instruction from the processor 180, and projects the generated image light L onto the screen SC. By projecting the image light L onto the screen SC, an image such as a drawing screen WB is displayed on the screen SC. The optical device 110 has a first image generating panel 111, a second image generating panel 112, a third image generating panel 113, a dichroic prism 114, and a projection optical system 115.

[0028] The first image generating panel 111 generates red image light LR representing a red image and outputs the red image light LR to the dichroic prism 114. The first image generating panel 111 has a plurality of pixels arranged in a matrix, and each of the plurality of pixels emits red light. The first image generating panel 111 generates the red image light LR by controlling the amount of emitted red light for each pixel in accordance with an instruction from the processor 180.

[0029] The second image generating panel 112 generates green image light LG representing a green image and outputs the green image light to the dichroic prism 114. The second image generating panel 112 has a plurality of pixels arranged in a matrix, and each of the plurality of pixels outputs green light. The second image generating panel 112 generates the green image light LG by controlling the amount of emitted green light for each pixel in accordance with an instruction from the processor 180.

[0030] The third image generating panel 113 generates blue image light LB representing a blue image and emits it to the dichroic prism 114. The third image generating panel 113 has a plurality of pixels arranged in a matrix, and each of the plurality of pixels emits blue light. The third image generating panel 113 generates the blue image light LB by controlling the amount of emitted blue light for each pixel in accordance with instructions from the processor 180.

[0031] For example, each of the image generating panels 111, 112, and 113 is a self-luminous electro-optical device such as an OLED (Organic Light Emitting Diode) panel or a μLED (Micro Light Emitting Diode) panel. Note that each of the image generating panels 111, 112, and 113 may be a non-self-luminous electro-optical device such as a liquid crystal panel or a DMD (Digital Micromirror Device). When each of the image generating panels 111, 112, and 113 is a non-self-luminous electro-optical device, light from a light source (not shown) such as an LED is separated into red light, green light, and blue light, respectively. The red light is incident on the first image generating panel 111. The green light is incident on the second image generating panel 112. The blue light is incident on the third image generating panel 113. Also, a single-panel image generating panel may be used to emit light of each color in a time-division manner.

[0032] The dichroic prism 114 generates image light L representing a color image by combining the red image light LR, the green image light LG, and the blue image light LB, and outputs the image light L to the projection optical system 115. The projection optical system 115 is composed of a plurality of optical elements such as lenses, and enlarges and projects the image light L output from the dichroic prism 114 onto the screen SC. Although not shown, the projection optical system 115 is provided with mechanisms that can adjust optical parameters such as the lens shift amount, lens focus amount, and lens zoom amount. These mechanisms are controlled by the processor 180, so that the optical parameters of the projection optical system 115 are adjusted.

[0033] The input device 120 is a device that accepts an input operation of the user to the projector 10. As an example, the input device 120 includes an operation unit 121 and a light receiving unit 122. The operation unit 121 is composed of a plurality of operation keys provided on the projector 10. For example, the operation keys include a power key, a menu call key, direction keys, a confirmation key, and a volume adjustment key. The operation keys may be hardware keys or software keys displayed on a touch panel provided on the projector 10. The operation unit 121 outputs an electric signal generated by the user operating each operation key to the processor 180 as an operation signal.

[0034] The light receiving unit 122 includes a photoelectric conversion circuit that receives infrared light transmitted from a remote controller (not shown) of the projector 10 and converts it into an electric signal. The light receiving unit 122 outputs an electric signal obtained by photoelectric conversion of the infrared light to the processor 180 as a remote operation signal. The remote controller is provided with a plurality of operation keys, similar to the operation unit 121. The remote controller converts an electric signal generated when each operation key provided on the remote controller is operated by the user into infrared light and transmits it to the projector 10. In other words, the remote operation signal output from the light receiving unit 122 is substantially the same as the electric signal generated when each operation key on the remote controller is operated by the user. Note that, in the case where the remote controller transmits a radio signal in accordance with a short-range wireless communication standard such as Bluetooth (registered trademark), a receiving device for receiving the radio signal may be provided instead of the light receiving unit 122.

[0035] The synchronization device 130 transmits infrared light as a synchronization signal in accordance with instructions from the processor 180. As already described, the electronic pen 20 has a function of emitting infrared light from its pen tip in synchronization with the synchronization signal transmitted from the synchronization device 130.

[0036] The projector 10 includes a first camera 140 and a second camera 150 to obtain position information of the electronic pen 20 or the user's finger F by a stereo system. The first camera 140 and the second camera 150 each include an imaging element that receives infrared light emitted by the electronic pen 20 and reflected light generated when the infrared light emitted from the light-emitting device 30 is reflected by the user's finger F, an optical system that forms an image on the imaging element, and an aperture that limits the light incident on the imaging element. The first camera 140 and the second camera 150 capture an image of an area including the screen SC according to an instruction from the processor 180, and output captured image data indicating the captured image to the processor 180.

[0037] As already described, the projector 10 includes a plurality of video input terminals. The video interface device 160 transitions the state of at least one of the plurality of video input terminals to an active state in accordance with an instruction from the processor 180. For example, when the state of the first video input terminal 11 connected to the communication device 40 among the plurality of video input terminals is an active state, the first video input terminal 11 accepts image data output from the communication device 40. On the other hand, when the state of the first video input terminal 11 is an inactive state, the first video input terminal 11 does not accept image data output from the communication device 40.

[0038] The storage device 170 includes a non-volatile memory that stores programs and various setting data required for the processor 180 to execute various processes, and a volatile memory that is used as a temporary storage destination for data when the processor 180 executes various processes. For example, the non-volatile memory is an EEPROM (Electrically Erasable Programmable Read-Only Memory) or a flash memory. For example, the volatile memory is a RAM (Random Access Memory). The storage device 170 pre-stores drawing screen data, which is image data showing the drawing screen WB.

[0039] The processor 180 is an arithmetic processing device that controls the operation of the projector 10 according to a program prestored in the storage device 170. As an example, the processor 180 is configured with one or more central processing units (CPUs). Some or all of the functions of the processor 180 may be configured with circuits such as a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA). The processor 180 executes various types of processing in parallel or sequentially.

[0040] The following describes a drawing function that is realized by processor 180 executing a program pre-stored in storage device 170. As already described, the drawing function is a function for drawing an object in first area W1 of drawing screen WB based on position information of electronic pen 20 or a user's finger F.

[0041] When the processor 180 receives an operation to turn on the drawing function, it reads out drawing screen data from the storage device 170 and instructs the optical device 110 to display the drawing screen WB based on the drawing screen data. In accordance with the instruction from the processor 180, the optical device 110 displays the drawing screen WB shown in FIG. 2 on the screen SC.

[0042] With the drawing screen WB displayed on the screen SC, the processor 180 acquires position information of the electronic pen 20 or the user's finger F. Specifically, the processor 180 instructs the synchronization device 130 to transmit a synchronization signal, and instructs the light-emitting device 30 to emit infrared light at a predetermined timing.

[0043] The electronic pen 20 emits infrared light from its pen tip in synchronization with a synchronization signal transmitted from the synchronization device 130 of the projector 10. The light emitting device 30 emits infrared light at a timing instructed by the processor 180.

[0044] The processor 180 controls the synchronization device 130 and the light emitting device 30 as described above, and also instructs the first camera 140 and the second camera 150 to perform a photographing operation at a predetermined timing.

[0045] First camera 140 and second camera 150 capture an image of an area including screen SC at a timing instructed by processor 180, and output captured image data indicating the captured image to processor 180. The captured image includes an image area indicating reflected light generated when infrared light emitted by electronic pen 20 or infrared light emitted from light-emitting device 30 is reflected by user's finger F.

[0046] The processor 180 acquires position information of the electronic pen 20 or the user's finger F based on the captured images obtained from the first camera 140 and the second camera 150. As a method for the processor 180 to acquire the position information of the electronic pen 20 or the user's finger F, the method disclosed in Patent Document 1 can be adopted. Therefore, in this embodiment, a description of the method for the processor 180 to acquire the position information of the electronic pen 20 or the user's finger F will be omitted.

[0047] The processor 180 instructs the optical device 110 to draw objects such as lines, characters, and figures in the first area W1 of the drawing screen WB based on the position information of the electronic pen 20 or the user's finger F. The optical device 110 displays the drawing screen WB on which the object is drawn in the first area W1 on the screen SC in accordance with the instruction from the processor 180. Fig. 4 is a diagram showing an example of the drawing screen WB on which the object is drawn in the first area W1.

[0048] Next, an online saving function that is realized by the processor 180 executing a program pre-stored in the storage device 170 will be described with reference to Fig. 5. As already described, the online saving function is a function for saving the drawing screen WB in at least one of the first cloud drive 50 and the second cloud drive 60 via the communication device 40.

[0049] Fig. 5 is a sequence chart showing the operations of the projector 10 and the communication device 40. As shown in Fig. 5, when a menu display operation instructing to display a menu image B1 is received while the drawing screen WB is being displayed (step S1), the processor 180 instructs the optical device 110 to display the menu image B1 on the drawing screen WB (step S2).

[0050] The menu display operation for instructing to display the menu image B1 is to press the menu display icon C1 displayed on the drawing screen WB with the electronic pen 20 or the user's finger F. Fig. 6 is a diagram showing an example of the drawing screen WB on which the menu image B1 is displayed in a state in which an object is drawn in the first area W1. As shown in Fig. 6, for example, the menu image B1 is displayed at a position above the menu display icon C1 in the first area W1.

[0051] 5, when processor 180 receives a save operation for selecting a save setting item for instructing to save drawing screen WB from among a plurality of items included in menu image B1 (step S3), processor 180 transmits a browser activation signal to communication device 40 (step S4). The browser activation signal is an instruction signal that instructs communication device 40 to activate a Web browser.

[0052] 6, among a plurality of items included in the menu image B1, the save setting item for instructing to save the drawing screen WB is the item "Save" included in the menu image B1. The save operation for selecting the save setting item is to press the item "Save" included in the menu image B1 with the electronic pen 20 or the user's finger F.

[0053] As shown in FIG. 5, when the communication device 40 receives a browser activation signal, it activates a Web browser (step S5). On the other hand, after transmitting the browser activation signal to the communication device 40, the processor 180 sets the state of the first video input terminal 11 to an active state in which image data output from the communication device 40 is accepted while the drawing screen WB is being displayed (step S6). That is, the processor 180 sets the state of the first video input terminal 11 from an inactive state in which image data output from the communication device 40 cannot be accepted to an active state in which image data output from the communication device 40 can be accepted. For example, the processor 180 turns on the power supply to the first video input terminal 11 to set the state of the first video input terminal 11 to an active state, and turns off the power supply to the first video input terminal 11 to set the state of the first video input terminal 11 to an inactive state.

[0054] When the communication device 40 launches the web browser, it outputs home screen data, which is image data showing a home screen of the web browser, to the projector 10. Therefore, when the state of the first video input terminal 11 of the projector 10 is set to an active state, the home screen data output from the communication device 40 is input to the projector 10. The processor 180 stores the home screen data input from the communication device 40 in the storage device 170, but does not instruct the optical device 110 to display a home screen based on the home screen data.

[0055] After setting the state of the first video input terminal 11 to the active state, the processor 180 instructs the optical device 110 to display a destination list image B2 indicating a list of destinations for the drawing screen WB on the drawing screen WB (step S7). Fig. 7 is a diagram showing an example of the drawing screen WB on which the destination list image B2 is displayed with an object drawn in the first area W1. As shown in Fig. 7, for example, the destination list image B2 is displayed in a position above the menu display icon C1 in the first area W1.

[0056] 7, for example, the destination list shown by the destination list image B2 includes "Drive A," "Drive B," "USB," and "Network" as candidates for destinations to save the drawing screen WB. "Drive A" indicates that the first cloud drive 50 is the destination to save the drawing screen WB. "Drive B" indicates that the second cloud drive 60 is the destination to save the drawing screen WB. "USB" indicates that the USB memory is the destination to save the drawing screen WB.

[0057] The save destination list image B2 also includes a message that prompts the user to perform a login operation. For example, the message is "Login has not been performed. Please perform login." The save destination list image B2 includes a login instruction icon C2 for instructing the user to perform login.

[0058] As shown in FIG. 5, when processor 180 receives a login operation to log in to a cloud drive while destination list image B2 is displayed on drawing screen WB (step S8), processor 180 sends a login notification to the selected cloud drive to communication device 40 (step S9).

[0059] A login operation is when one of "Drive A" and "Drive B" included in the destination list shown by the destination list image B2 is selected, and the login instruction icon C2 included in the destination list image B2 is pressed with the electronic pen 20 or the user's finger F.

[0060] In the following description, it is assumed that the login instruction icon C2 is pressed while “Drive A” included in the storage destination list is selected. In this case, in step S9, the processor 180 transmits a login notification to the first cloud drive 50 to the communication device 40.

[0061] When the communication device 40 receives a login notification to the first cloud drive 50, the communication device 40 outputs login screen data, which is image data showing a login screen LS on which authentication information for logging in to the first cloud drive 50 is input, to the projector 10 (step S10).

[0062] After transmitting the login notification to the communication device 40, the processor 180 instructs the optical device 110 to display a login screen LS based on login screen data input from the communication device 40 via the first video input terminal 11 alongside the drawing screen WB (step S11). Fig. 8 is a diagram showing an example of the login screen LS displayed alongside the drawing screen WB. As shown in Fig. 8, the login screen LS is a screen into which an account and a password are input as authentication information for logging in to the first cloud drive 50.

[0063] Although not shown in FIG. 5, the processor 180 transmits the account and password entered on the login screen LS to the first cloud drive 50 via the communication device 40.

[0064] When the communication device 40 receives a login completion notification from the first cloud drive 50 (step S12), the communication device 40 transmits a login completion notification indicating that the login to the first cloud drive 50 has been completed to the projector 10 (step S13).

[0065] After receiving a login completion notification from the communication device 40, the processor 180 instructs the optical device 110 to erase the login screen LS (step S14), and further instructs the optical device 110 to display an attribute editing image B3 for editing attribute information of the drawing screen WB on the drawing screen WB without accepting a menu display operation (step S15).

[0066] Fig. 9 is a diagram showing an example of the drawing screen WB on which the attribute editing image B3 is displayed. As shown in Fig. 9, by using the attribute editing image B3, for example, the directory name of the folder, the file name, the page range, the file format, and whether or not encryption is performed can be edited as attribute information of the drawing screen WB.

[0067] When the processor 180 receives an operation of pressing the save button C3 included in the attribute edited image B3, the processor 180 saves the drawing screen WB in the first cloud drive 50 based on the attribute information of the drawing screen WB.

[0068] (Effects of this embodiment) As described above, the display system 1 of this embodiment includes a projector 10 including an optical device 110 that displays an image on a screen SC and a processor 180 that instructs the optical device 110 to display a drawing screen WB for drawing an object based on position information of an electronic pen 20 or a user's finger F, and a communication device 40 having an operating system for controlling communications and connected to the first video input terminal 11 of the projector 10. The communication device 40 is connected via a network NW to a first cloud drive 50 that provides an online storage service for saving a drawing screen WB, and when an instruction signal is received from the processor 180, the communication device 40 obtains login screen data from the first cloud drive 50 that indicates a login screen LS into which authentication information for logging in to the first cloud drive 50 is entered. After sending an instruction signal to the communication device 40, the processor 180 sets the state of the first video input terminal 11 to an active state for accepting login screen data output from the communication device 40 while the drawing screen WB is displayed, and after setting the state of the first video input terminal 11 to the active state, when a login operation for logging in to the first cloud drive 50 is accepted, instructs the optical device 110 to display a login screen LS based on the login screen data on the screen SC.

[0069] In the display system 1 as described above, the projector 10 sets the state of the first video input terminal 11 connected to the communication device 40 to an active state before accepting a login operation for logging in to the first cloud drive 50. This allows the projector 10 to acquire login screen data from the communication device 40 before accepting the login operation, and therefore, when the login operation is accepted, the login screen LS based on the login screen data can be displayed on the screen SC in a short time. As described above, according to the display system 1 of the present embodiment, the time from when the projector 10 accepts a login operation for logging in to the first cloud drive 50 until when the login screen LS is displayed can be shortened.

[0070] In the display system 1 of this embodiment, when a login operation is accepted, the processor 180 instructs the optical device 110 to display the login screen LS side by side with the rendering screen WB.

[0071] According to the above-described display system 1, the login screen LS is displayed alongside the drawing screen WB, so that the user can input authentication information into the login screen LS while checking the drawing screen WB. Therefore, according to the above-described display system 1, it is possible to improve user convenience.

[0072] In the display system 1 of this embodiment, when the processor 180 receives a menu display operation to instruct the display of the menu image B1, it instructs the optical device 110 to display the menu image B1 on the drawing screen WB, and when it receives a save operation to select a save setting item from among the multiple items included in the menu image B1 to instruct the saving of the drawing screen WB, it transmits a browser startup signal to the communication device 40.

[0073] According to the display system 1 described above, when the processor 180 receives a save operation to select a save setting item included in the menu image B1, the processor 180 transmits a browser startup signal to the communication device 40, thereby reducing the processing load of the processor 180.

[0074] In the display system 1 of this embodiment, when the processor 180 receives a login completion notification from the communication device 40 indicating that login to the first cloud drive 50 has been completed, it instructs the optical device 110 to display an attribute editing image B3 for editing attribute information of the drawing screen WB on the drawing screen WB without accepting a menu display operation.

[0075] According to the display system 1 as described above, the user does not need to perform a menu display operation to display the attribute edited image B3 on the drawing screen WB, so that user convenience can be improved.

[0076] The technical scope of the present disclosure is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit and scope of the present disclosure.

[0077] In the above embodiment, the processor 180 has been described as instructing the optical device 110 to display the login screen LS side by side with the drawing screen WB when a login operation is accepted. In addition, after instructing the optical device 110 to display the login screen LS side by side with the drawing screen WB, the processor 180 may instruct the optical device 110 to display an attribute editing image B3 for editing attribute information of the drawing screen WB side by side with the drawing screen WB instead of the login screen LS when a login completion notification indicating that login to the first cloud drive 50 has been completed is received from the communication device 40.

[0078] Fig. 10 is a diagram showing an example of a drawing screen WB displayed alongside an attribute editing image B3 instead of a login screen LS. As shown in Fig. 10, when a login completion notification is received from the communication device 40, the attribute editing image B3 is displayed alongside the drawing screen WB instead of the login screen LS, allowing the user to edit the attribute information of the drawing screen WB while checking the drawing screen WB. Therefore, the above-described modified example can improve user convenience.

[0079] In the above embodiment, a form has been described in which the processor 180 instructs the optical device 110 to display the menu image B1 on the drawing screen WB when a menu display operation is received, and transmits a browser activation signal to the communication device 40 when a save operation for selecting a save setting item included in the menu image B1 is received. Alternatively to this form, the processor 180 may instruct the optical device 110 to display the menu image B1 on the drawing screen WB when a menu display operation is received, instruct the optical device 110 to display a save destination list image B2 indicating a save destination list of the drawing screen WB when a save operation for selecting a save setting item included in the menu image B1 is received, and transmit a browser activation signal to the communication device 40 when a focus operation for focusing on the save destination list is received.

[0080] According to this modified example, when a focus operation to focus on the save destination list included in save destination list image B2 is received, a browser activation signal is transmitted to communications device 40, which can reduce the processing load on processor 180 compared to a configuration in which a browser activation signal is transmitted to communications device 40 when a save operation to select a save setting item included in menu image B1 is received. Note that the focus operation to focus on the save destination list refers to moving electronic pen 20 or the user's finger F in a manner to trace the area of ​​the save destination list included in save destination list image B2.

[0081] In the above embodiment, a drawing function of drawing an object in the first area W1 of the drawing screen WB based on position information of the electronic pen 20 or the user's finger F has been described as one of the functions of the projector 10. The present disclosure is not limited to this, and the projector 10 may have a function of displaying an image based on a video signal supplied from a video supply device such as a personal computer in the first area W1 of the drawing screen WB, and drawing an object in the first area W1 of the drawing screen WB based on position information of the electronic pen 20 or the user's finger F.

[0082] Summary of the Disclosure The following is a summary of this disclosure.

[0083] (Supplementary Note 1) A display system comprising: a projector including an optical device that displays an image on a display surface, and one or more processors that instruct the optical device to display a drawing screen for drawing an object based on position information of a pointer; and a communication device having an operating system for controlling communications and connected to a first video input terminal of the projector, wherein the communication device is connected via a network to an external server that provides an online storage service for saving the drawing screen, and when an instruction signal is received from the one or more processors, the communication device obtains login screen data from the external server indicating a login screen into which authentication information for logging in to the external server is input, and after sending the instruction signal to the communication device, the one or more processors set a state of the first video input terminal to an active state that accepts the login screen data output from the communication device while the drawing screen is displayed, and after setting the state of the first video input terminal to the active state, when a login operation for logging in to the external server is received, instructs the optical device to display the login screen based on the login screen data on the display surface.

[0084] In the display system described in Supplementary Note 1, the projector sets the state of the first video input terminal connected to the communication device to an active state before accepting a login operation for logging in to an external server. This allows the projector to obtain login screen data from the communication device before accepting the login operation, and therefore, when the login operation is accepted, the login screen based on the login screen data can be displayed on the display surface in a short time. As described above, according to the display system of Supplementary Note 1, the time from when the projector accepts a login operation for logging in to an external server to when it displays the login screen can be shortened.

[0085] (Supplementary Note 2) The display system described in Supplementary Note 1, wherein the one or more processors instruct the optical device to display the login screen alongside the drawing screen when the login operation is accepted.

[0086] According to the display system described in Supplementary Note 2, the login screen is displayed alongside the drawing screen, so that the user can input authentication information into the login screen while checking the drawing screen. Therefore, the display system of Supplementary Note 2 can improve user convenience.

[0087] (Appendix 3) The display system described in Appendix 2, wherein, after instructing the optical device to display the login screen alongside the drawing screen, when a login completion notification indicating that login to the external server has been completed is received from the communication device, the one or more processors instruct the optical device to display an attribute editing image for editing attribute information of the drawing screen alongside the drawing screen instead of the login screen.

[0088] According to the display system described in Supplementary Note 3, when a login completion notification is received from a communication device, an attribute editing image is displayed side by side with a drawing screen instead of a login screen, so that the user can edit the attribute information of the drawing screen while checking the drawing screen. Therefore, the display system of Supplementary Note 3 can improve user convenience.

[0089] (Appendix 4) A display system described in any one of Appendices 1 to 3, wherein when a menu display operation to instruct the display of a menu image is received, the one or more processors instruct the optical device to display the menu image on the drawing screen, and when a save operation to select a save setting item from among multiple items included in the menu image to instruct the display of the drawing screen is received, the processors transmit the instruction signal to the communication device.

[0090] According to the display system described in Appendix 4, when a save operation to select a save setting item included in a menu image is received, the one or more processors send an instruction signal to a communication device, thereby reducing the processing load of the one or more processors.

[0091] (Appendix 5) The display system described in any one of Appendices 1 to 3, wherein when a menu display operation to instruct the display of a menu image is received, the one or more processors instruct the optical device to display the menu image on the drawing screen, when a save operation to select a save setting item from among multiple items included in the menu image to instruct the display of the drawing screen, instruct the optical device to display a save destination list image indicating a list of save destinations for the drawing screen, and when a focus operation to focus on the save destination list is received, transmit the instruction signal to the communication device.

[0092] According to the display system described in Appendix 5, when a focus operation to focus on a save destination list included in a save destination list image is received, the one or more processors send an instruction signal to the communications device. Therefore, the processing load of the one or more processors can be reduced more than in the display system of Appendix 4, in which an instruction signal is sent to the communications device when a save operation to select a save setting item included in a menu image is received.

[0093] (Appendix 6) A display system as described in Appendix 4 or 5, wherein when the one or more processors receive a login completion notification from the communication device indicating that login to the external server has been completed, the one or more processors instruct the optical device to display an attribute editing image for editing attribute information of the drawing screen on the drawing screen without accepting the menu display operation.

[0094] According to the display system described in Supplementary Note 6, the user does not need to perform a menu display operation to display the attribute edited image on the drawing screen, thereby improving user convenience.

[0095] (Supplementary Note 7) A projector comprising: an optical device that displays an image on a display surface; one or more processors that instruct the optical device to display a drawing screen for drawing an object based on position information of a pointer; and a first video input terminal connected to a communications device that is connected via a network to an external server that provides an online storage service for saving the drawing screen, wherein after sending an instruction signal to the communications device, the one or more processors set a state of the first video input terminal to an active state that accepts login screen data output from the communications device and indicating a login screen into which authentication information for logging in to the external server is input, while the drawing screen is displayed, and after setting the state of the first video input terminal to the active state, when a login operation for logging in to the external server is accepted, instruct the optical device to display the login screen based on the login screen data on the display surface.

[0096] In the projector described in Supplementary Note 7, one or more processors set the state of the first video input terminal connected to the communication device to an active state before accepting a login operation for logging in to an external server. This allows the projector to obtain login screen data from the communication device before accepting the login operation, so that when the login operation is accepted, the login screen based on the login screen data can be displayed on the display surface in a short time. As described above, according to the projector of Supplementary Note 7, the time from accepting a login operation for logging in to an external server to displaying the login screen can be shortened.

[0097] (Appendix 8) A program that causes a computer to execute the following steps: instructing an optical device to display on a display surface a drawing screen for drawing an object based on position information of a pointer; after sending an instruction signal to a communication device connected to a first video input terminal, while the drawing screen is displayed, setting a state of the first video input terminal to an active state that accepts login screen data output from the communication device and indicating a login screen into which authentication information for logging in to an external server is input; and after setting the state of the first video input terminal to the active state, when a login operation for logging in to the external server is accepted, instructing the optical device to display on the display surface the login screen based on the login screen data.

[0098] According to the program described in Supplementary Note 8, the computer sets the state of the first video input terminal connected to the communication device to an active state before accepting a login operation for logging in to an external server. This allows the computer to obtain login screen data from the communication device before accepting the login operation, so that when the login operation is accepted, a login screen based on the login screen data can be displayed on the display surface in a short time. As described above, according to the program in Supplementary Note 8, it is possible to shorten the time from accepting a login operation for logging in to an external server to displaying the login screen. [Explanation of symbols]

[0099] 1...display system, 10...projector, 11...first video input terminal, 20...electronic pen (pointer), 30...light-emitting device, 40...communication device, 50...first cloud drive (external server), 60...second cloud drive (external server), 110...optical device, 180...processor, NW...network, SC...screen (display surface)

Claims

1. an optical device for displaying an image on a display surface; one or more processors that instruct the optical device to display a drawing screen for drawing an object based on position information of a pointer; a projector including: a communication device having an operating system for controlling communication and connected to a first video input terminal of the projector; Equipped with The communication device includes: an external server that provides an online storage service for storing the drawing screen is connected via a network; When an instruction signal is received from the one or more processors, login screen data indicating a login screen into which authentication information for logging in to the external server is input is acquired from the external server; The one or more processors: after transmitting the instruction signal to the communication device, while the drawing screen is being displayed, setting a state of the first video input terminal to an active state for receiving the login screen data output from the communication device; instructing the optical device to display the login screen based on the login screen data on the display surface when a login operation for logging in to the external server is accepted after the state of the first video input terminal is set to the active state; Display system.

2. The one or more processors: The display system according to claim 1 , wherein when the login operation is accepted, the display system instructs the optical device to display the login screen side by side with the drawing screen.

3. The one or more processors: The display system of claim 2, wherein after instructing the optical device to display the login screen alongside the drawing screen, when a login completion notification indicating that login to the external server has been completed is received from the communication device, the display system instructs the optical device to display an attribute editing image for editing attribute information of the drawing screen alongside the drawing screen instead of the login screen.

4. The one or more processors: when a menu display operation for instructing to display a menu image is received, instructing the optical device to display the menu image on the drawing screen; The display system according to claim 1, wherein the instruction signal is transmitted to the communication device when a save operation is received that selects a save setting item from among a plurality of items included in the menu image to instruct saving the drawing screen.

5. The one or more processors: when a menu display operation for instructing to display a menu image is received, instructing the optical device to display the menu image on the drawing screen; instructing the optical device to display, on the drawing screen, a save destination list image indicating a list of save destinations for the drawing screen when a save operation is received that selects a save setting item for instructing to save the drawing screen from among a plurality of items included in the menu image; The display system according to claim 1 , wherein the instruction signal is transmitted to the communication device when a focus operation for focusing on the storage destination list is received.

6. The one or more processors: A display system as described in claim 4 or 5, wherein when a login completion notification indicating that login to the external server has been completed is received from the communication device, the optical device is instructed to display an attribute editing image for editing attribute information of the drawing screen on the drawing screen without accepting the menu display operation.

7. an optical device for displaying an image on a display surface; one or more processors that instruct the optical device to display a drawing screen for drawing an object based on position information of a pointer; a first video input terminal connected to a communication device connected via a network to an external server providing an online storage service for storing the drawing screen; Equipped with The one or more processors: after transmitting an instruction signal to the communication device, while the drawing screen is being displayed, setting a state of the first video input terminal to an active state for accepting login screen data output from the communication device and showing a login screen into which authentication information for logging in to the external server is input; instructing the optical device to display the login screen based on the login screen data on the display surface when a login operation for logging in to the external server is accepted after the state of the first video input terminal is set to the active state; projector.

8. instructing the optical device to display on a display surface a drawing screen for drawing an object based on position information of the pointer; after transmitting an instruction signal to a communication device connected to a first video input terminal, while the drawing screen is being displayed, setting a state of the first video input terminal to an active state for accepting login screen data output from the communication device and showing a login screen into which authentication information for logging in to an external server is input; instructing the optical device to display the login screen based on the login screen data on the display surface when a login operation for logging in to the external server is received after the state of the first video input terminal is set to the active state; A program that causes a computer to execute the following.

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