JP6834163B2 - Display system and display method - Google Patents

Description

The present invention relates to a display system and Table How to Display.

As an invention for displaying a plurality of images in a predetermined order, for example, there is an apparatus disclosed in Patent Document 1. This device can display the images of the image data included in the data file for presentation side by side in the order specified for each image. For example, the previous and next pages are displayed side by side. can do.

JP-A-2009-129223

In the device for displaying an image, there is a technique for writing the displayed image with an indicator. When this technique is used, the drawn image displayed in response to the operation of the indicator is generated separately from the image for presentation and displayed superimposed on the image for presentation. Therefore, when the displayed page is advanced, the written drawing image remains even if the displayed page is changed, and the remaining drawing image becomes meaningless to the image of the advanced page.

The present invention provides a technique for displaying a drawn image corresponding to a changed image even if the displayed image is changed when the displayed image is drawn by an indicator.

The present invention is a display system including a first display device and a second display device, wherein the first display device has a first display unit that displays a first display image on a display surface, and instructions for the display surface. A position specifying unit that specifies the position of the body, a drawing unit that generates a drawn image based on the position specified by the position specifying unit, a first acquisition unit that acquires a first background image supplied from an external device, and the above. It has a first image processing unit that supplies the first display image in which the drawn image is superimposed on the first background image to the first display unit, and a first supply unit that supplies the drawn image. The display device includes a second display unit that displays the second display image on the display surface, a drawn image acquisition unit that acquires the drawn image, a second acquisition unit that acquires the first background image, and the first background. Provided is a display system including a second image processing unit that supplies the second display image in which the drawn image is superimposed on the image to the second display unit.
According to the present invention, when the displayed image is drawn by the indicator, even if the displayed image is changed, the drawn image corresponding to the changed image can be displayed.

In the present invention, the first supply unit may be configured to supply the drawn image and the first background image to the second display device.
According to this configuration, when an image is supplied from the first display device and the image displayed on the second display device is changed, even if the displayed image is changed, the drawn image corresponding to the changed image is displayed. be able to.

Further, in the present invention, the first display device and the information processing device for supplying the first background image to the second display device are provided, and the first supply unit outputs the drawn image to the information processing device. The information processing device may be configured to have a third acquisition unit for supplying the drawn image and a second supply unit for supplying the drawn image to the second display device.
According to this configuration, when an image is supplied from the information processing device and the image displayed on the display device is changed, even if the displayed image is changed, the drawn image corresponding to the changed image can be displayed. ..

Further, in the present invention, the third acquisition unit acquires an image generated by the drawing unit when the information processing device displays the first background image on the first display unit, and obtains the information. The processing device stores the drawn image acquired by the third acquisition unit in association with the first background image supplied to the first display device when the drawn image is generated. The second supply unit has the first background image supplied to the second display device and the drawn image stored in the storage unit in association with the first background image. It may be configured to supply to the display device.
According to this configuration, it is possible to display the drawing according to the change of the image to be displayed with respect to the image to be displayed.

Further, in the present invention, when the first display device is displaying the first display image, the second display device includes a second background image different from the first background image. May be configured to display.
According to this configuration, a plurality of different images can be displayed side by side.

Further, the present invention is a drawing that generates a display unit that displays a display image on a display surface, a position specifying unit that specifies the position of an indicator with respect to the display surface, and a drawn image based on the position specified by the position specifying unit. A unit, an acquisition unit that acquires a background image supplied from an external device, an image processing unit that supplies the display image obtained by superimposing the drawn image on the background image to the display unit, and a supply unit that supplies the drawn image. A display device including a unit is provided.
Further, the present invention includes a display unit that displays a display image on a display surface, a drawing image acquisition unit that acquires a drawing image supplied from an external device, and an acquisition unit that acquires a background image supplied from the external device. Provided is a display device including an image processing unit that supplies an image in which the drawn image is superimposed on the background image to the display unit.
According to these display devices, when the displayed image is drawn by the indicator, even if the displayed image is changed, the drawn image corresponding to the changed image can be displayed.

Further, in the present invention, the first display device generates a position specifying step for specifying the position of the indicator with respect to the display surface, and the first display device generates a drawn image based on the position specified in the position specifying step. The drawing step, the first acquisition step in which the first display device acquires the first background image supplied from the external device, and the first background acquired by the first display device in the first acquisition step. A first display step of displaying a first display image on which the drawn image generated in the drawing step is superimposed on an image on the display surface, a supply step in which the first display device supplies the drawn image, and a first. A drawing image acquisition step in which the two display devices acquire the drawn image, a second acquisition step in which the second display device acquires the first background image, and a second acquisition step in which the second display device acquires the first background image. Provided is a display method including a second display step of displaying an image obtained by superimposing the drawn image acquired in the drawn image acquisition step on the first background image acquired in the above on a display surface.
According to the present invention, when the displayed image is drawn by the indicator, even if the displayed image is changed, the drawn image corresponding to the changed image can be displayed.

The figure which showed the apparatus which comprises the display system 1. The block diagram which showed the hardware composition of the projectors 10A and 10B. The functional block diagram of the control unit 110. The block diagram which showed the hardware configuration of the server apparatus 30. The functional block diagram of the control unit 301. The figure which showed an example of the image projected by the projectors 10A and 10B. The figure which showed an example of the image projected by the projectors 10A and 10B. The figure which showed an example of the image projected by the projectors 10A and 10B. The figure which showed an example of the image projected by the projectors 10A and 10B. The flowchart which showed the flow of the process performed by the control unit 301. The figure which showed the apparatus which comprises the display system 1A. The functional block diagram of the control unit 110C, 110D. The flow of processing performed by the control unit 110C is shown.

[First Embodiment]
FIG. 1 is a diagram showing a device constituting the display system 1 according to the first embodiment of the present invention. The projectors 10A and 10B are examples of display devices that project an image supplied from an external device onto a projection surface such as a screen or a wall surface. Since the configurations of the projectors 10A and 10B are the same, hereinafter, when it is not necessary to distinguish each of the projectors 10A and 10B, it is referred to as a projector 10. The projectors 10A and 10B are connected to the wired communication network 2, and by communicating with the device connected to the communication network 2, images are supplied to the external device connected to the communication network 2 and from the external device. Acquire the image of. Further, the projectors 10A and 10B have a drawing function of drawing an image according to the movement locus of the indicator body 20.

The pen-shaped indicator 20 functions as a pointing device when the above-mentioned drawing function is used, and is used when the user draws on the projected image. The indicator body 20 is provided with a light emitting unit that emits infrared light at the tip thereof, and emits infrared light when a button provided on the indicator body 20 is operated.

The server device 30, which is an example of the information processing device, is connected to the communication network 2 and communicates with the projector 10 to supply an image to the projector 10 and acquire an image from the projector 10. The communication network 2 may be a wireless communication network, or may be a communication network including both wired and wireless communication paths.

In the present embodiment, the server device 30 supplies an image to the projectors 10A and 10B, and the projector 10A and the projector 10B project the image supplied from the server device 30. The projector 10A and the projector 10B are installed so that the projected images are arranged side by side on the projection surface. On the projection surface, as shown in FIG. 1, the image projected by the projector 10A is on the left side, and the image projected by the projector 10B is on the right side.

(Structure of projectors 10A and 10B)
FIG. 2 is a diagram showing the hardware configuration of the projectors 10A and 10B. In this embodiment, the basic hardware configurations of the projectors 10A and 10B are the same. Hereinafter, when it is necessary to distinguish each part of the projectors 10A and 10B, "A" is added to the end of the code of each part of the projector 10A and "B" is added to the end of the code of each part of the projector 10B for convenience of explanation. The explanation will be given with. When it is not necessary to distinguish each part, the description will be made by omitting the addition of "A" and "B" to the end of the code.

The projector 10 includes a control unit 110, a storage unit 120, an operation unit 130, and a projection unit 140. Further, the projector 10 includes a video processing unit 150, a video interface 160, an imaging unit 170, and a communication unit 180.

The control unit 110 is a microcomputer provided with a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory). In the projector 10, when the CPU executes a program stored in the ROM, the control unit 110 controls each unit to realize various functions such as a function of projecting an image, a function of communicating with an external device, and a drawing function. The storage unit 120 stores information related to settings related to the image quality of the projected image and settings related to various functions.

The operation unit 130 includes a plurality of buttons for operating the projector 10. By controlling each unit according to the operated buttons, the projected image can be adjusted and various functions of the projector 10 can be set. Further, the operation unit 130 has a light receiving unit that receives infrared light emitted by a remote controller (not shown). The operation unit 130 receives an infrared light signal emitted by the remote controller, and supplies an electric signal representing the received signal to the control unit 110. The control unit 110 controls each unit according to the signal supplied from the operation unit 130.

The communication unit 180 includes a wired communication communication interface, a wireless communication communication interface according to the IEEE802.11 standard, a Bluetooth (registered trademark) communication interface, a USB (Universal Serial Bus) communication interface, and the like. The interface communicates with other computer devices and other projectors 10. The communication unit 180 communicates with the external device, acquires an image supplied from the external device, and supplies the image to the external device. The communication unit 180 is an example of an acquisition unit that acquires an image supplied from an external device.

The video interface 160 has connectors such as RCA, D-Sub, HDMI (registered trademark), and USB, and supplies an image supplied to the connector from an external device to the video processing unit 150. The video processing unit 150 acquires an image acquired by the communication unit 180 from an external device and an image supplied from the video interface 160. Further, the video processing unit 150 acquires an on-screen image from the control unit 110. The image processing unit 150 is provided with various image processing functions, and performs image processing on an image acquired by the communication unit 180 from another device or an image supplied from the image interface 160 to adjust the image quality of the projected image. To do. The image processing unit 150 supplies an image whose image quality has been adjusted to the projection unit 140. When the on-screen image is supplied from the control unit 110, the image processing unit 150 supplies the superimposed image of the on-screen image to the projection unit 140. The image processing unit 150 is an example of an image processing unit that supplies an image obtained by superimposing an on-screen image on an image supplied from an external device to a projection unit 140, which is a display unit.

The projection unit 140 for projecting an image includes a light source 141, a light bulb 142, a drive circuit 144, and a projection optical system 143. The projection unit 140 is an example of a display unit that displays an image. The light source 141 is a lamp that emits light, and the light emitted by the light source 141 is dispersed into red, green, and blue light by a plurality of dichroic mirrors and mirrors (not shown), and the separated red, green, and blue lights are used. The light is guided to the light valve 142. The light source 141 may be a light emitting diode or a semiconductor laser device that emits laser light instead of a lamp.

The drive circuit 144 acquires an image supplied from the video processing unit 150. The image supplied to the drive circuit 144 includes gradation data representing the gradation of the red component in the projected image, gradation data representing the gradation of the green component in the projected image, and the blue component in the projected image. It has gradation data representing gradation. The drive circuit 144 extracts gradation data of each color of red, green, and blue, and drives the light bulb 142 based on the gradation data of each extracted color.

The light valve 142 includes the above-mentioned liquid crystal light valve in which red light is incident, the above-mentioned liquid crystal light valve in which green light is incident, and the above-mentioned liquid crystal light valve in which blue light is incident. The liquid crystal light bulb is a transmissive liquid crystal panel, and includes pixels arranged in a matrix with a plurality of rows and a plurality of columns. The liquid crystal light valve that receives red light is driven based on the red gradation data, and the liquid crystal light valve that receives green light is driven based on the green gradation data, and the liquid crystal light that receives blue light. The valve is driven based on the blue gradation data. In each liquid crystal light bulb, each pixel is controlled by the drive circuit 144, and the transmittance of the pixel changes. By controlling the transmittance of the pixels, the light of each color transmitted through the liquid crystal light bulb becomes an image corresponding to each gradation data. Images of red, green, and blue light transmitted through the liquid crystal light valve are combined by a dichroic prism (not shown) and incident on the projection optical system 143. The projection optical system 143 is an optical system that magnifies an incident image, and enlarges and projects the incident image with a lens or a mirror.

The image pickup unit 170 includes an image pickup element (CMOS, CCD, etc.) that receives infrared light emitted by the indicator body 20, an optical system that forms an image on the image pickup element, a diaphragm that limits the light incident on the image pickup element, and the like. There is. The imaging unit 170 sets the projection range of the projection unit 140 as the imaging range, generates an image of the captured range, and outputs the generated image to the control unit 110. In this embodiment, since the projector 10 is installed diagonally above the projection surface, the image pickup unit 170 takes an image of the projection range from diagonally above.

FIG. 3 is a functional block diagram showing a configuration of functions realized by the control unit 110 executing a ROM program. The position specifying unit 1001 analyzes the image supplied from the imaging unit 170 and specifies the position of the indicator in the display area of the image projected by the projection unit 140. The drawing unit 1002 generates a drawn image which is an on-screen image according to the position specified by the position specifying unit 1001. The supply unit 1003 supplies the image generated by the drawing unit 1002 to an external device. The acquisition unit 1004 is an example of an acquisition unit that acquires an image to be projected. The image acquired by the acquisition unit 1004 also includes a drawn image. The acquisition unit 1004 is also an example of a drawn image acquisition unit. The acquisition unit 1004 supplies the acquired image to the video processing unit 150.

(Configuration of server device 30)
FIG. 4 is a diagram showing a hardware configuration of the server device 30. The communication unit 305 functions as a communication interface for performing data communication via the communication network 2. The storage unit 302 has a hard disk device, and stores a program executed by the control unit 301. Further, in the present embodiment, the storage unit 302 stores an image file representing a multi-page slide used in the presentation. Further, the storage unit 302 stores the data of the drawn image drawn by the drawing function in the projector 10.

The control unit 301 has a CPU, a ROM, and a RAM. When the CPU executes a program stored in the storage unit 302, the server device 30 communicates with the projector 10 via the communication network 2 to supply an image to the projector 10 and data of a drawn image. The function acquired from the projector 10 is realized.

FIG. 5 is a block diagram showing the configuration of the functions according to the present embodiment among the functions realized by the control unit 301 executing the program. The acquisition unit 3001 acquires the data of the drawn image supplied from the projector 10. The supply unit 3002 supplies the drawn image data acquired from the projector 10 to the projector 10.

(Operation example of the first embodiment)
Next, an operation example of this embodiment will be described. In the present embodiment, the server device 30 supplies the images of two pages before and after the images of the slides of the plurality of pages included in the image file stored in the storage unit 302 to the projector 10. Specifically, the server device 30 is set to supply the image of the page having the smaller page number to the projector 10A and the image of the page having the larger page number to the projector 10B among the two pages before and after. ing.

When the user performs an operation to access the image file stored in the server device 30 in the projector 10A, the server device 30 displays the image of the slide of the first page included in the accessed image file in the projector 10A. The image of the slide on the second page is supplied to the projector 10B. When the projectors 10A and 10B acquire the image supplied from the server device 30, the projector 10A shifts the image (second background image) of the first page supplied from the server device 30 to the left side as illustrated in FIG. Projecting, the projector 10B projects the image (first background image) of the second page supplied from the server device 30 to the right side.

Next, when the user moves the indicator body 20 onto the screen projected by the projector 10A, the imaging unit 170A photographs the infrared light emitted by the indicator body 20 and supplies the image obtained by the photographing to the control unit 110A. To do. The control unit 110A analyzes the image supplied from the image pickup unit 170A and identifies the position of the indicator body 20. Next, when the user moves the indicator body 20 on the screen, the control unit 110A analyzes the image supplied from the image pickup unit 170A, identifies the position of the indicator body 20 after the movement, and connects the specified positions. On-screen image (an example of a drawn image) is supplied to the image processing unit 150A. The image processing unit 150A generates an image in which the on-screen image is superimposed on the image of the first page supplied from the server device 30, and supplies the generated image to the projection unit 140A. When the projected image 140A projects the supplied image, for example, as shown in FIG. 7, a drawn image G11 (third display image) corresponding to the movement of the indicator 20 is projected.

Further, when the user moves the indicator body 20 onto the screen projected by the projector 10B, the imaging unit 170B photographs the infrared light emitted by the indicator body 20 and supplies the image obtained by the photographing to the control unit 110B. .. The control unit 110B analyzes the image supplied from the image pickup unit 170B and identifies the position of the indicator body 20. Next, when the user moves the indicator body 20 on the screen, the control unit 110B analyzes the image supplied from the image pickup unit 170B, identifies the position of the indicator body 20 after the movement, and connects the specified positions. On-screen image (an example of a drawn image) is supplied to the image processing unit 150B. The image processing unit 150B generates an image in which this on-screen image is superimposed on the image on the second page supplied from the server device 30, and supplies the generated image (first display image) to the projection unit 140B. When the projected image 140B projects the supplied image, for example, as shown in FIG. 8, the drawn image G12 corresponding to the movement of the indicator body 20 is projected.

Next, when the user operates the remote controller to change the displayed page to the projector 10A, the page change instruction is sent from the projector 10A to the server device 30. When the communication unit 305 acquires this change instruction, the control unit 301 executes the process shown in FIG.

First, the control unit 301 acquires the data of the drawn image projected by the projectors 10A and 10B (step S1). Specifically, the control unit 301 transmits a request message requesting the data of the drawn image to the projectors 10A and 10B. When the communication unit 180A acquires this request message, the control unit 110A supplies the data of the projected image G11 to the server device 30. When the communication unit 180B acquires this request message, the control unit 110B supplies the data of the projected image G12 to the server device 30. The communication unit 305 acquires the data of the drawn image supplied from the projectors 10A and 10B via the communication network 2.

Next, the control unit 301 stores the drawn image data supplied from the projector 10 in the storage unit 302 in association with the image supplied to the projector 10 (step S2). Here, the control unit 301 stores the data of the drawn image G11 supplied from the projector 10A in the storage unit 302 in association with the image of the first page supplied to the projector 10A. Further, the control unit 301 stores the data of the drawn image G12 supplied from the projector 10B in the storage unit 302 in association with the image on the second page supplied to the projector 10B.

Next, the control unit 301 transmits an erasing message instructing the erasing of the drawn image to the projectors 10A and 10B (step S3). When the communication unit 180A acquires this erasure message, the control unit 110A erases the projected image G11. When the communication unit 180B acquires this erase message, the control unit 110B erases the projected image G12.

Next, the control unit 301 supplies a new image to the projectors 10A and 10B in response to the change instruction (step S4). Specifically, when the page change instruction is the content of advancing the page, the control unit 301 transfers the image of the second page and the data of the drawn image G12 stored in association with the image of the second page to the projector 10A. The image on the third page is supplied to the projector 10B. At this point, since the drawn image data is not stored in association with the image on the third page, the control unit 301 does not supply the drawn image data to the projector 10B.

When the communication unit 180A acquires the data of the second page image and the drawn image G12, the control unit 110A supplies the acquired data of the second page image and the drawn image G12 to the image processing unit 150A. The image processing unit 150A generates an image (second display image) in which the drawn image G12 is superimposed on the image on the second page, and supplies the generated image to the projection unit 140A. When the projection unit 140A projects the supplied image, for example, as shown in FIG. 9, the image on the second page and the drawn image G12 are projected on the left side.

When the communication unit 180B acquires the image on the third page, the control unit 110B supplies the acquired image on the third page to the video processing unit 150B. The image processing unit 150B supplies the image on the third page to the projection unit 140B. When the projection unit 140B projects the supplied image, for example, as shown in FIG. 9, the image on the third page is projected on the right side.

As described above, according to the present embodiment, even if the displayed image is changed after the displayed image is drawn by the indicator body 20, the drawn image corresponding to the changed image is displayed. can do.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. FIG. 11 is a diagram showing a device constituting the display system 1A according to the second embodiment of the present invention. The display system 1A differs from the display system 1 in that it does not include the server device 30. The projectors 10C and 10D are examples of display devices that project an image onto a projection surface such as a screen or a wall surface. The projectors 10C and 10D are connected to the communication network 2. Since the hardware configuration of the projectors 10C and 10D is the same as that of the projector 10A (10B), the description of the hardware configuration will be omitted. When it is necessary to distinguish each part of the projectors 10C and 10D, for convenience of explanation, "C" is added to the end of the code of each part of the projector 10C, and "D" is added to the end of the code of each part of the projector 10D. The explanation will be given with. When it is not necessary to distinguish each part, the description will be made by omitting the addition of "C" and "D" to the end of the code.

In the present embodiment, the projector 10C supplies an image to the projector 10D and acquires an image from the projector 10D. The projector 10D projects an image supplied from the projector 10C and supplies the drawn image data to the projector 10C. The projector 10C and the projector 10D are installed so that the projected images are arranged side by side on the projection surface. On the projection surface, as shown in FIG. 11, the image projected by the projector 10D is on the left side, and the image projected by the projector 10C is on the right side.

FIG. 12 is a functional block diagram of projectors 10C and 10D. The supply unit 1003A supplies the drawn image generated by the drawing unit 1002 to another projector 10. Further, the supply unit 1003A supplies the image acquired from the video interface to another projector 10. The acquisition unit 1004 acquires an image supplied from another projector 10. Further, the acquisition unit 1004 supplies the acquired image to the video processing unit 150.

(Operation example of the second embodiment)
Next, an operation example of this embodiment will be described. In the present embodiment, a USB memory storing an image file used in the presentation is attached to the USB connector of the video interface 160C. The display system 1A projects images of two pages before and after the images of the slides of a plurality of pages included in the image file stored in the USB memory with the projectors 10C and 10D. Specifically, in the display system 1A, the projector 10C is set to project an image of a page having a large page number among two pages before and after, and supply an image of a page having a small page number to the projector 10B. Has been done.

When the user performs an operation to access the image file stored in the USB memory in the projector 10C, the projector 10C projects the image of the second page slide included in the accessed image file and 1 The image of the slide of the page is supplied to the projector 10D. The projector 10D projects an image supplied from the projector 10C. As a result, as illustrated in FIG. 6, the projector 10C projects the image on the first page to the right side, and the projector 10D projects the image on the second page to the right side.

Next, when the user moves the indicator body 20 onto the screen projected by the projector 10D, the imaging unit 170D photographs the infrared light emitted by the indicator body 20 and supplies the image obtained by the photographing to the control unit 110D. To do. The control unit 110D analyzes the image supplied from the image pickup unit 170D to specify the position of the indicator body 20. Next, when the user moves the indicator body 20 on the screen, the control unit 110D analyzes the image supplied from the image pickup unit 170D, identifies the position of the indicator body 20 after the movement, and connects the specified positions. On-screen image (an example of a drawn image) is supplied to the image processing unit 150D. The image processing unit 150D generates an image in which this on-screen image is superimposed on the image of the first page supplied from the projector 10C, and supplies the generated image to the projection unit 140D. When the projection unit 140D projects the supplied image, for example, as shown in FIG. 7, the drawn image G11 corresponding to the movement of the indicator body 20 is projected.

Further, when the user moves the indicator body 20 onto the screen projected by the projector 10C, the imaging unit 170C photographs the infrared light emitted by the indicator body 20 and supplies the image obtained by the photographing to the control unit 110C. .. The control unit 110C analyzes the image supplied from the image pickup unit 170C and identifies the position of the indicator body 20. Next, when the user moves the indicator body 20 on the screen, the control unit 110C analyzes the image supplied from the image pickup unit 170C, identifies the position of the indicator body 20 after the movement, and connects the specified positions. On-screen image (an example of a drawn image) is supplied to the image processing unit 150C. The image processing unit 150C generates an image in which the on-screen image is superimposed on the image on the second page acquired from the USB memory, and supplies the generated image to the projection unit 140C. When the projection unit 140C projects the supplied image, for example, as shown in FIG. 8, the drawn image G12 corresponding to the movement of the indicator body 20 is projected.

Next, when the user operates the remote controller to change the displayed page on the projector 10C, the control unit 110C executes the process shown in FIG.

First, the control unit 110C acquires the data of the drawn image projected by the projector 10D (step S11). Specifically, the control unit 110C transmits a request message requesting the data of the drawn image to the projector 10D. When the communication unit 180D acquires this request message, the control unit 110D supplies the data of the projected image G11 to the projector 10C. The communication unit 180C acquires the data of the drawn image supplied from the projector 10D via the communication network 2.

Next, the control unit 110C stores the drawn image data in association with the projected image in the USB memory (step S12). Here, the control unit 110C stores the data of the drawn image G11 supplied from the projector 10D in the USB memory in association with the image of the first page supplied to the projector 10D. Further, the control unit 110C stores the generated data of the drawn image G12 in the USB memory in association with the image of the second page projected by the projector 10C.

Next, the control unit 110C erases the drawn image (step S13). Specifically, the control unit 110C erases the drawn image G12. Further, the control unit 110C transmits an erasing message instructing the erasing of the drawn image to the projector 10C. When the communication unit 180C acquires this erasure message, the control unit 110C erases the projected image G11.

Next, the control unit 110C supplies a new image to the projector 10D (step S14). Specifically, when the operation by the remote controller is the content of advancing the page, the control unit 110C uses the image of the second page and the data of the drawn image G12 stored in association with the image of the second page in the projector 10D. Supply to.

When the communication unit 180D acquires the data of the second page image and the drawn image G12, the control unit 110D supplies the acquired data of the second page image and the drawn image G12 to the image processing unit 150D. The image processing unit 150D generates an image in which the drawn image G12 is superimposed on the image on the second page, and supplies the generated image to the projection unit 140D. When the projection unit 140D projects the supplied image, for example, as shown in FIG. 9, the image on the second page and the drawn image G12 are projected on the left side.

Next, the control unit 110C projects a new image in response to an operation by the remote controller (step S15). Specifically, the control unit 110C acquires the image of the third page from the USB memory and supplies the acquired image to the image processing unit 150C. At this point, since the drawn image data is not stored in association with the image on the third page, the control unit 110C does not supply the drawn image data to the image processing unit 150C.

Further, the image processing unit 150C supplies the supplied image to the projection unit 140C. When the projection unit 140C projects the supplied image, for example, as shown in FIG. 9, the image on the third page is projected on the right side.

As described above, according to the present embodiment, even if the displayed image is changed after the displayed image is drawn by the indicator 20, the drawn image corresponding to the changed image is displayed. can do.

[Modification example]
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be implemented in various other embodiments. For example, the present invention may be carried out by modifying the above-described embodiment as follows. In addition, each of the above-described embodiments and the following modifications may be carried out by appropriately combining one or a plurality of them.

In the above-described embodiment, the projector 10 displays an image, but the display device that displays the image is not limited to the projector 10, and may be, for example, a direct-view type display device. When the device for displaying an image is a direct-view type display device, for example, a touch panel capable of detecting the position of a finger is adopted, and the position of a finger as an indicator is detected by the touch panel. The display device displays a drawn image according to the detected finger position.

1, 1A ... Display system, 10, 10A, 10B, 10C, 10D ... Projector, 20 ... Indicator, 30 ... Server device, 110, 110A, 110B ... Control unit, 120 ... Storage unit, 130 ... Operation unit, 140 ... Projection unit, 150, 150A, 150B, 150C, 150D ... Video processing unit, 160, 160C ... Video interface, 170, 170A, 170B, 170C, 170D ... Imaging unit, 180, 180A, 180B, 180C, 180D ... Communication unit, 301 ... control unit, 302 ... storage unit, 305 ... communication unit, 1001 ... position identification unit, 1002 ... drawing unit, 1003, 1003A ... supply unit, 1004 ... acquisition unit, 3001 ... acquisition unit, 3002 ... supply unit.

Claims (6)

A display system having a first display device and a second display device.
The first display device is
The first display unit that displays an image on the display surface,
A position specifying unit that specifies the position of the indicator with respect to the display surface, and
A drawing unit that generates a drawing image based on the position specified by the position specifying unit, and a drawing unit.
The first acquisition unit that acquires the background image supplied from the external device,
When the first background image acquired by the first acquisition unit is displayed on the first display unit, the first display image obtained by superimposing the drawn image generated by the drawing unit on the first background image is displayed. The first image processing unit supplied to the first display unit and
It has a first supply unit that supplies the drawn image to the information processing device.
The second display device is
A second display unit that displays an image on the display surface,
A drawing image acquisition unit that acquires the drawing image supplied from the information processing device,
A second acquisition unit that acquires a background image supplied from the information processing device, and
With the second image processing unit that supplies the second display image in which the drawn image is superimposed on the background image acquired by the second acquisition unit to the second display unit.
It has a third acquisition unit that acquires an erasing message for erasing the drawn image from the information processing device.
In a state where the first background image is supplied to the first display device and the second background image is supplied to the second display device, the first display device converts the drawn image into the first background image. Display the superimposed first display image,
The third acquisition unit acquires the erasure message transmitted when the device for displaying the first background image is switched from the first display device to the second display device.
When the third acquisition unit acquires the erasure message, the second image processing unit erases the first drawing image displayed at that time.
The second image processing unit displays an image obtained by superimposing the first drawing images the drawing image acquisition unit has acquired after the first drawing image is erased in the first background image as the second display image Display system. The display system according to claim 1, wherein the first supply unit supplies the drawn image and the first background image to the second display device. It has an information processing device that supplies the first background image to the first display device and the second display device.
The information processing device
The fourth acquisition unit that acquires the drawn image and
The display system according to claim 1, further comprising a second supply unit that supplies the drawn image to the second display device. The fourth acquisition unit acquires an image generated by the drawing unit when the information processing device displays the first background image on the first display unit.
The information processing device stores the drawn image acquired by the fourth acquisition unit in association with the first background image supplied to the first display device when the drawn image is generated. Has a storage unit
The second supply unit supplies the first background image supplied to the second display device and the drawn image stored in the storage unit in association with the first background image to the second display device. The display system according to claim 3. From claim 1, when the first display device is displaying the first display image, the second display device displays a third display image including a second background image different from the first background image. The display system according to any one of claims 4. A position specifying step in which the first display device specifies the position of the indicator with respect to the first display surface,
A drawing step in which the first display device generates a drawn image based on the position specified in the position specifying step.
The first acquisition step in which the first display device acquires the first background image supplied from the external device,
When the first background image acquired in the first acquisition step is displayed on the first display device, the first display image obtained by superimposing the drawn image generated in the drawing step on the first background image is displayed. , The first image processing step of supplying to the first display surface,
The first supply step in which the first display device supplies the drawn image to the external device,
A second display step in which the second display device acquires the drawn image supplied from the external device, and
A drawing image acquisition step in which the second display device acquires a background image supplied from the external device, and
The second acquisition step to acquire the background image and
A second image process in which the second display device supplies a second display image obtained by superimposing the drawn image acquired in the drawn image acquisition step on the background image acquired in the second acquisition step to the second display surface. Steps and
It has a third acquisition step of acquiring an erasing message for erasing the drawn image from the external device.
In a state where the first background image is supplied to the first display device and the second background image is supplied to the second display device, the first display device converts the drawn image into the first background image. Display the superimposed first display image,
In the third acquisition step, the erase message to be transmitted is acquired when the device for displaying the first background image is switched from the first display device to the second display device.
When the erasure message is acquired, in the second image processing step, the first drawing image displayed at that time is erased.
In the second image processing step, the image superimposed with the first drawing images obtained in the drawing image obtaining step after the first drawing image is erased in the first background image as the second display image Display display method.

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