JP2008009253A - Image display system, image supply device, and image display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image display system, an image supply system, and an image display device, permitting simplifying of device configuration and acquiring of a display image of the image display device. <P>SOLUTION: The image supply device 100 comprises a 1st data transmission part (USB display host 12) which transmits a 1st image data as an image data to the image display device 200; and a 2nd data receiving part (USB camera host 13) which receives a 2nd image data transmitted from the image display device 200, and the image display device 200 comprises: a 1st data-receiving part (USB display device 20) which receives the 1st image data transmitted from the image supply device 100; a display part 23 which displays the 1st image data; an image data capture part 24 which captures the 1st image data and uses it as a 2nd image data; and a 2nd data transmission part (USB camera device 25) which transmits the 2nd image data to the image supply device 100. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an image display system, an image supply device, and an image display device that include an image supply device that supplies image data and an image display device that displays an image based on the image data supplied from the image supply device. Is.

  Conventionally, a video projected by a projector or the like has been acquired and recorded as a conference record for a presentation or the like. For example, a presenter who makes a presentation inputs video information captured using a digital video camera, etc., presentation material information from a presentation terminal such as a personal computer, etc. A multimedia content generation device that generates a file and outputs information such as the document information to a video output device such as a projector is disclosed (Patent Document 1).

JP 2005-252574 A

  However, in Patent Document 1, in order to acquire and record an image projected by a projector or the like, in addition to an image supply device such as a personal computer or an image display device such as a projector, a digital video camera or an image is recorded. A device (multimedia content generation device) must be prepared, many devices are required, installation and wiring are complicated, and there is a problem in simplifying the device configuration.

  The present invention has been made to solve such a problem, and can simplify the apparatus configuration and can acquire a display image of an image display apparatus, an image supply apparatus, and an image An object is to provide a display device.

  In order to achieve the above object, an image display system of the present invention is connected to an image supply device that supplies image data, and the image supply device via a connection means, and is based on image data supplied from the image supply device An image display system including an image display device that performs display, wherein the image supply device is transmitted from a first data transmission unit that transmits first image data as image data to the image display device, and the image display device. A second data receiving unit that receives the second image data, and the image display device includes a first data receiving unit that receives the first image data transmitted from the image supply device, and a first data receiving unit. A display unit that displays the image data, an image data capture unit that captures the first image data and sets the second image data, and a second image captured by the image data capture unit A second data transmitter for transmitting data to the image supply apparatus, further comprising a a gist.

  According to such an image display system, the first data transmission unit in the image supply device transmits the first image data to the image display device via the connection unit. The first data receiving unit in the image display device receives the first image data, and the display unit displays the first image data. The image data capture unit captures the first image data and sets it as second image data. The second data transmission unit transmits the second image data to the image supply device via the connection unit. A second data receiving unit in the image supply device receives the second image data. Therefore, the display image of the image display device can be acquired by a system having a simple device configuration of the image supply device and the image display device without using many devices as in the prior art.

  In the image display system, the image display device includes an external input unit that receives one or a plurality of externally input image data, and at least one of the first image data and the externally input image data. Preferably, the display unit displays the image data selected by the image data input switching unit.

  According to such an image display system, the external input unit in the image display apparatus receives the externally input image data, and the image data input switching unit stores the image data from the first image data and the externally input image data. Select and switch. The display unit displays the selected image data. Therefore, the image display device can select and display image data not only from the first image data transmitted from the image supply device but also from image data input from the outside.

  In the image display system, it is preferable that the image data capture unit captures the image data selected by the image data input switching unit, and sets the second image data.

  According to such an image display system, the image data capture unit in the image display device captures the image data selected by the image data input switching unit to obtain the second image data, and the second data transmission unit includes the connection means. Then, the second image data is transmitted to the image supply device. A second data receiving unit in the image supply device receives the second image data. Therefore, the image supply device can receive and acquire not only the transmitted first image data but also externally input image data. At this time, since the second image data received by the image supply device is obtained by capturing an image displayed by the image display device, the display image of the image display device and the image acquired by the image supply device are the same. Become.

  In the image display system, it is preferable that the connection unit uses communication conforming to the USB standard.

  According to such an image display system, the image supply device and the image display device are connected by communication conforming to the USB (Universal Serial Bus) standard. For example, when an image supply device and an image display device are connected using a USB cable, transmission and reception can be performed simultaneously using a single cable, and a plurality of wirings are not necessary. Therefore, the connection between the image supply device and the image display device can be simplified.

  In the image display system, the connection means preferably uses IP network communication.

  According to such an image display system, the image supply device and the image display device are connected by communication using IP network communication. For example, when an image supply device and an image display device are connected by IP network communication using a network cable, transmission and reception can be performed simultaneously only by connecting the network cable. Wiring becomes unnecessary. Therefore, the connection between the image supply device and the image display device can be simplified.

  In the image display system, the image supply device preferably includes a network connection unit that enables IP network communication for information communication used in addition to the connection unit with the image display device.

  According to such an image display system, the second data receiving unit in the image supply device receives the second image data from the image display device, and the network connection means transmits the second image data to the IP for information communication. Send to the network using network communication. Therefore, for example, the image supply device can transmit the image data currently displayed by the image display device to the network almost in real time.

  In the image display system, the image supply device preferably includes a software program unit for performing bidirectional simultaneous communication of audio data and video data as information communication via a network connection unit.

  According to such an image display system, the second data receiving unit in the image supply device receives the second image data from the image display device, and the software program unit uses the network connection means to transmit audio data as information communication. And two-way simultaneous communication of video data. For example, the image supply device includes an existing video conference software program, and uses the video conference software program to distribute image data currently displayed on the image display device to a third party in almost real time. You can hold a video conference.

  In order to achieve the above object, an image supply apparatus according to the present invention includes a first data transmission unit and a second data reception unit.

  According to such an image supply device, the first data transmission unit of the image supply device transmits the first image data to the image display device, and the image display device displays the received first image data. The second image data is transmitted to the image supply device. The image display apparatus also receives externally input image data, displays the received externally input image data, and transmits the received image data as second image data to the image supply apparatus. The second data receiving unit of the image supply device receives the second image data from the image display device. Therefore, the image supply device can acquire the first image data or the externally input image data as the second image data.

  In the image supply device, the image supply device is preferably connected to the image display device by connection means using communication conforming to the USB standard.

  According to such an image supply device, the image supply device is connected to the image display device by communication conforming to the USB standard. For example, when a USB cable is used to connect to the image display apparatus, it is possible to perform transmission and reception simultaneously with a single cable, and a plurality of wires are not necessary. Therefore, the connection with the image display apparatus can be simplified.

  In the image supply device, it is preferable that the image supply device is connected to the image display device by connection means using IP network communication.

  According to such an image supply device, the image supply device is connected to the image display device by communication using IP network communication. For example, when connected to the image display apparatus by IP network communication using a network cable, transmission and reception can be performed simultaneously by connecting only one network cable, and a plurality of wirings are not necessary. Therefore, the connection with the image display apparatus can be simplified.

  In the image supply apparatus, it is preferable that the image supply apparatus includes a network connection unit that enables IP network communication for information communication used in addition to the connection unit with the image display device.

  According to such an image supply device, the second data receiving unit in the image supply device receives the second image data from the image display device, and the network connection means transmits the second image data to the IP for information communication. Send to the network using network communication. Therefore, the image supply device can transmit the acquired second image data to the network in substantially real time.

  In the image supply apparatus, the image supply apparatus preferably includes a software program unit for performing bidirectional simultaneous communication of audio data and video data as information communication via a network connection unit.

  According to such an image supply device, the second data receiving unit in the image supply device receives the second image data from the image display device, and the software program unit uses the network connection means as audio data as information communication. And two-way simultaneous communication of video data. For example, the image supply device includes an existing video conference software program, and uses the video conference software program to distribute image data currently displayed on the image display device to a third party in almost real time. You can hold a video conference.

  In order to achieve the above object, an image display apparatus according to the present invention includes a first data receiving unit, a display unit, an image data capturing unit, and a second data transmitting unit.

  According to such an image display device, the first data receiving unit in the image display device receives the first image data from the image supply device via the connecting means, and the display unit displays the first image data. . The image data capture unit captures the first image data and sets it as second image data. The second data transmission unit transmits the second image data to the image supply device via the connection unit. Therefore, the image display device displays the first image data received from the image supply device, and transmits the first image data similar to the displayed image data to the image supply device in the form of second image data. Can do.

  The image display device preferably includes an external input unit and an image data input switching unit, and the display unit displays the image data selected by the image data input switching unit.

  According to such an image display device, the external input unit in the image display device receives the externally input image data, and the image data input switching unit receives the image data from the first image data and the externally input image data. Select and switch. The display unit displays the selected image data. Therefore, the image display device can select and display image data not only from the first image data transmitted from the image supply device but also from image data input from the outside.

  In the image display device, it is preferable that the image data capture unit captures the image data selected by the image data input switching unit to obtain second image data.

  According to such an image display device, the image data capture unit in the image display device captures the image data selected by the image data input switching unit to obtain the second image data, and the second data transmission unit includes the connection means. Then, the second image data is transmitted to the image supply device. Therefore, the image display apparatus can transmit not only the first image data but also the externally input image data as the second image data to the image supply apparatus. At this time, since the second image data is obtained by capturing an image displayed by the image display device, the image data displayed by the image display device and the image data transmitted to the image supply device are the same.

  In the image display device, the image display device is preferably connected to the image supply device by connection means using communication conforming to the USB standard.

  According to such an image display device, the image display device is connected to the image supply device by communication conforming to the USB standard. For example, when a USB cable is used to connect to the image supply apparatus, transmission and reception can be performed simultaneously using a single cable, and a plurality of wirings are not necessary. Therefore, the connection with the image supply device can be simplified.

  In the image display device, the image display device is preferably connected to the image supply device by connection means using IP network communication.

  According to such an image display device, the image display device is connected to the image supply device by communication using IP network communication. For example, when an image supply apparatus is connected by IP network communication using a network cable, it is possible to perform transmission and reception simultaneously only by connecting the network cable, and a plurality of wirings are not necessary. Therefore, the connection with the image supply device can be simplified.

(First embodiment)
Hereinafter, the first embodiment of the present invention will be described with reference to FIGS. 1 and 2.

FIG. 1 is a configuration diagram of an image display system according to the first embodiment of the present invention. The configuration of the image display system 1 will be described with reference to FIG.
The image display system 1 includes an image supply device 100 and an image display device 200. The image supply device 100 and the image display device 200 are connected as a connection means via a communication path compliant with the USB standard. In the present embodiment, as illustrated, the image supply device 100 uses a personal computer, and the image display device 200 uses a projector. The connection means uses a USB cable 110. Further, the image display device 200 projects the image data transmitted from the image supply device 100 on the screen 500 as an image.

  FIG. 2 is a functional block diagram showing a functional configuration of the image display system according to the first embodiment of the present invention. As shown in the figure, in the image display system 1, the image supply device 100 functions as a host side in USB communication and the image display device 200 functions as a device side in USB communication. In this embodiment, it is assumed that two USB functions, a USB display and a USB camera, are mounted and function as a multi-function. Here, the USB display virtually realizes a display that displays a screen by USB. Therefore, when the device side is viewed from the USB host side, screen display data communication can be performed on the assumption that the display is connected. The USB camera is a virtual camera realized by USB. Therefore, when the device side is viewed from the USB host side, data communication can be performed assuming that the camera is connected.

A functional configuration of the image supply apparatus 100 in the image display system 1 will be described.
The image supply apparatus 100 includes a presentation software program unit 10, a screen transfer driver 11, a USB display host 12 as a first data transmission unit of a USB host (communication unit), and a second data reception of the USB host (communication unit). A USB camera host 13 and a USB camera driver 14 are provided.

A functional configuration of the image display apparatus 200 in the image display system 1 will be described.
The image display device 200 includes a USB display device 20 as a first data receiving unit of a USB device (communication unit), a screen configuration unit 21, a DAC (D / A converter) unit 22, a display unit 23, and image data. A capture unit 24 and a USB camera device 25 as a second data transmission unit of the USB device (communication unit) are provided.

  Hereinafter, the operation of the image display system 1 will be described. In the following description, the first image data refers to the screen transfer driver 11, the USB display host 12, the USB display device 20, the screen configuration unit 21, and the DAC unit from the presentation software program unit 10 in the image supply apparatus 100. 22, the image data on the data transmission path to the display unit 23 and the image data capture unit 24 are collectively referred to, and the data format is not limited. The second image data is a general term for image data on the data transmission path from the image data capture unit 24 to the USB camera device 25, the USB camera host 13, and the USB camera driver 14, and the data format is not limited. Make it not exist.

  The presentation software program unit 10 in the image supply apparatus 100 functions as application software for displaying a screen such as a presentation. For example, software dedicated to presentation, such as POWERPOINT (registered trademark), or application software that the user desires to display on the screen is not limited. The screen transfer driver 11 transfers screen image data displayed by the presentation software program unit 10 to the USB display host 12 as first image data. The USB display host 12 transmits the transferred first image data to the USB display device 20 in the image display device 200 via the USB cable 110. At this time, in the USB communication of this embodiment, when the screen displayed by the presentation software program unit 10 is updated and a difference occurs, the first image data is transmitted as a digital data format representing the update difference. And

  The USB display device 20 in the image display apparatus 200 outputs the received first image data to the screen configuration unit 21. The screen configuration unit 21 sequentially develops the first image data input as the screen update difference and configures it in the form of a screen image. The first image data of the constructed screen image is converted from the digital data format to the first image data in the analog data format by the DAC unit 22 which is a D / A converter. The first image data of the screen image converted into the analog data format is input to the display unit 23 and displayed. Here, in the present embodiment, since the image display apparatus 200 uses a projector, the display unit 23 corresponds to a projection unit that projects an image of the projector. An image projected from the projection unit can be visually recognized by being projected on the screen 500 or the like.

  On the other hand, the first image data of the screen image converted into the analog data format is captured at any time by the image data capture unit 24 and converted into image data in the digital data format. The image data capture unit 24 transfers the captured image data to the USB camera device 25 as second image data. The USB camera device 25 transmits the second image data as data virtually captured by the camera to the USB camera host 13 in the image supply apparatus 100 via the USB cable 110. The USB camera driver 14 acquires the second image data received by the USB camera host 13.

According to the first embodiment described above, the following effects can be obtained.
(1) According to the image display system 1 of the present embodiment, the first image data transmitted from the image supply device 100 to the image display device 200 is displayed by the image display device 200 and displayed by the image display device 200. Is captured and transmitted to the image supply apparatus 100 as second image data, and the image supply apparatus 100 can acquire the received second image data. Therefore, supply of image data, display, and acquisition of displayed image data can be realized with a simple apparatus configuration. The acquired image data can be recorded in a recording medium (not shown), for example, as a recorded content of the presentation.

  (2) According to the image display system 1 of the present embodiment, the image display device 200 performs, for example, image processing such as enlargement or reduction, or color correction processing on the first image data received from the image supply device 100. In such a case, the image supply apparatus 100 can acquire image data similar to the processed image data as the second image data. Even when the acquired image data is used as the recorded content, the same image data as that displayed on the image display device 200 is recorded, so that the recorded content can be faithful to the presentation content.

  (3) According to the image display system 1 of the present embodiment, two USB functions of a USB display and a USB camera are mounted and function as a multi-function. Can be realized simultaneously with a single cable. Therefore, the wiring between the image supply device 100 and the image display device 200 is simplified, and the user can easily realize the image display system.

(Second Embodiment)
Next, the second embodiment will be described with reference to FIGS. In the description of this embodiment, differences from the first embodiment are mainly described.

FIG. 3 is a configuration diagram of an image display system according to the second embodiment of the present invention. In FIG. 3, an external image output device 300 is added to FIG. 1 showing the first embodiment, and other components are the same as those in FIG. Reference numerals are added.
Here, the external image output device 300 indicates an image output device such as a DVD player or a video player. In this embodiment, a DVD player is used as the external image output device 300 as shown in FIG. The external image output device 300 is connected to the image display device 200 via the connection cable 120 and outputs image data. The number of external image output devices 300 is not limited to one, and there may be a plurality of cases. For the connection cable 120, for example, a video cable such as a video cable, an S video cable, or a component cable is appropriately used according to the video output standard of the external image output device 300 to be connected.

  FIG. 4 is a functional block diagram showing a functional configuration of an image display system according to the second embodiment of the present invention. In FIG. 4, an external image output device 300 is added to FIG. 2 showing the first embodiment. The external image output device 300 is connected to the image display device 200 via the connection cable 120. Further, an external input unit 26 and an image data input switching unit 27 are added in the image display device 200. Other functional components are the same as those in FIG. 2, and the same functional components are denoted by the same reference numerals.

Hereinafter, the operation of the image display system 2 will be described.
The image data output from the external image output device 300 is input to the external input unit 26 in the image display device 200 via the connection cable 120. The external input unit 26 sends externally input image data to the image data input switching unit 27. The image data input switching unit 27 displays from the externally input image data input from the external input unit 26 and the first image data transmitted from the image supply device 100 and input through the DAC unit 22. Select image data. The selected image data is input to the display unit 23 and displayed. As means for instructing the image data input switching unit 27 to select image data, for example, an operation button (not shown) provided on the main body of the image display device 200 or an operation function of the image display device 200 is used. An operating remote controller (not shown) can be used. Here, the number of image data to be selected is not limited to one, and may be plural. For example, the image data input switching unit 27 includes an image composition unit (not shown) that selects a plurality of image data and divides the selected image data into a single screen data size and arranges them. Thus, composite image data is generated. And it can display by inputting synthetic image data into the display part 23. FIG.

  The image data capture unit 24 captures the image data selected by the image data input switching unit 27 as needed, and generates the second image data in the digital data format. The image data capture unit 24 transfers the captured second image data to the USB camera device 25. The USB camera device 25 transmits the second image data to the USB camera host 13 in the image supply apparatus 100 as data obtained by virtually capturing the image with the camera. The USB camera driver 14 acquires the second image data received by the USB camera host 13.

According to 2nd Embodiment mentioned above, there can exist an effect similar to effect (1)-(3) in 1st Embodiment. In addition, the following effects can be obtained.
According to the image display system 2 of the present embodiment, the image display device 200 displays not only the first image data transmitted from the image supply device 100 but also the image data of external input from the external image output device 300. can do. Therefore, the user can select and display desired image data. In addition, the image supply apparatus 100 can acquire image data displayed on the image display apparatus 200. Therefore, for example, even when the display is switched to the externally input image data by the user's intention while the first image data transmitted from the image supply device 100 is being displayed, the image supply device 100 acquires the image data. The second image data is switched from the first image data transmitted from the image supply device 100 to the image data of external input. Therefore, it is possible to acquire image data reflecting the user's intention. The image data acquired in this way is suitable for saving as recorded content because the video from the image supply device 100 and the video from the external image output device 300 are smoothly switched.

(Third embodiment)
Next, the third embodiment will be described with reference to FIGS. In the description of the present embodiment, differences from the second embodiment are mainly described.

FIG. 5 is a configuration diagram of an image display system according to the third embodiment of the present invention. In FIG. 5, a network 600 and a third-party information processing device 400 connected to the network are added to FIG. 3 illustrating the second embodiment. Other components are the same as those in FIG. 3, and the same components are denoted by the same reference numerals.
Here, the network 600 indicates, for example, an IP network communication path. The third-party information processing apparatus 400 uses a personal computer, for example. The third-party information processing apparatus 400 is not limited to one, and may be a plurality.

  FIG. 6 is a functional block diagram showing a functional configuration of an image display system according to the third embodiment of the present invention. In FIG. 6, a network 600 and a third-party information processing device 400 connected to the network are added to FIG. 4 showing the second embodiment. The network 600 is connected to the image supply device 100. Further, a microphone 30 and a speaker 31 are added in a form connected to the image supply apparatus 100. Further, in the image supply apparatus 100, a video conference software program unit 15, a network connection unit 16, an audio input unit 17, and an audio output unit 18 are added. Other functional components are the same as those in FIG. 4, and similar functional components are denoted by the same reference numerals.

Hereinafter, the operation of the image display system 3 will be described.
The second image data acquired by the USB camera driver 14 in the image supply apparatus 100 is sent to the video conference software program unit 15. The video conference software program unit 15 has a function of realizing a video conference with a third party information processing apparatus 400 connected to the network 600 using the network connection unit 16. In video conferencing, two-way simultaneous audio and video communication is performed. The video of the video conference is transmitted by transmitting the second image data acquired by the USB camera driver 14. The video conference video is received from the third-party information processing apparatus 400. As for the audio transmission of the video conference, the audio input unit 17 inputs the audio from the microphone 30 and sends the audio data to the video conference software program unit 15. The video conference software program unit 15 transmits the audio data to the third party information processing apparatus 400. For the audio reception of the video conference, the audio data received from the third-party information processing apparatus 400 is sent from the video conference software program unit 15 to the audio output unit 18 and output by the speaker 31. Here, the network connection unit 16 is connected to the network 600 using a protocol such as TCP / IP, for example, and performs communication.

According to 3rd Embodiment mentioned above, there can exist an effect similar to the effect (1)-(3) in 1st Embodiment, and the effect in 2nd Embodiment. In addition, the following effects can be obtained.
(1) According to the image display system 3 of the present embodiment, an image displayed on the image display device 200 can be distributed to a third party information processing device 400 connected to the network 600 in almost real time. . Therefore, for example, when presentation software is executed by the image supply apparatus 100 and the presentation contents are displayed by the image display apparatus 200 at the venue where the presentation is performed, the third party is assumed to be at a remote place. In addition, the presentation contents can be viewed by the information processing apparatus 400 via the network 600. Further, even when the image data to be displayed is switched to the external input image data of the external image output device 300 such as a DVD player during the presentation, the video of the external input image data is transferred to the third party information processing device 400. Since it is distributed, the third party can view the image data of the external input. That is, the third party can view the same video as the video viewed by the attendee at the presentation venue in almost real time.

  (2) According to the image display system 3 of the present embodiment, since the USB camera is used as the USB function, the video conference software program unit 15 can use the video conference software compatible with the USB camera. . Therefore, commercially available general-purpose video conference software can be used. In addition, if it is compatible with a USB camera, videophone software using a network can also be used.

(Fourth embodiment)
Next, the fourth embodiment will be described with reference to FIG. In the description of the present embodiment, differences from the third embodiment are mainly described.

  FIG. 7 is a functional block diagram showing a functional configuration of an image display system according to the fourth embodiment of the present invention. The fourth embodiment is obtained by changing the connection means for connecting the image supply device 100 and the image display device 200 to USB in the third embodiment to IP network communication. 7 is different from FIG. 6 showing the third embodiment in that the connection means is changed from the USB cable 110 to the IP network communication path 110a. Note that the IP network communication used here indicates a communication path different from the network communication using the network connection means 16 in the image supply apparatus 100a.

A difference in functional configuration between the image supply device 100 of the image display system 3 and the image supply device 100a of the image display system 4 will be described.
In the image supply apparatus 100, the function configuration unit that is the USB display host 12 as the first data transmission unit of the USB host (communication unit) is replaced with the first data transmission of the TCP / IP stack (communication unit) in the image supply apparatus 100a. The network display host 12a as a unit is changed. In addition, in the image supply apparatus 100, the function configuration unit that is the USB camera host 13 as the second data reception unit of the USB host (communication unit) is replaced with the second TCP / IP stack (communication unit) of the TCP / IP stack (communication unit). The network camera client 13a as a data receiving unit is changed. Further, in the image supply apparatus 100, the function configuration unit that has been the USB camera driver 14 is changed to the network camera driver 14a in the image supply apparatus 100a. The other functional components of the image supply device 100a are the same as those of the image supply device 100, and the same functional components are denoted by the same reference numerals.

A difference in functional configuration between the image display device 200 of the image display system 3 and the image display device 200a of the image display system 4 will be described.
In the image display device 200, the function configuration unit that is the USB display device 20 as the first data reception unit of the USB device (communication unit) is replaced with the first data reception of the TCP / IP stack (communication unit) in the image display device 200a. The network display client 20a as a unit is changed. In the image display device 200, the function configuration unit that is the USB camera device 25 as the second data transmission unit of the USB device (communication unit) is replaced with the second data transmission of the TCP / IP stack (communication unit) in the image display device 200a. The network camera host 25a as a unit is changed. Other functional components of the image display device 200a are the same as those of the image display device 200, and the same reference numerals are appended to the same functional components.

  The IP network communication between the image supply device 100a and the image display device 200a uses, for example, an IP network communication protocol such as TCP / IP. Further, the image display system 4 of the present embodiment supports both the network display protocol and the network camera protocol. As the network display protocol, for example, RDP (Remote Desktop Protocol) protocol or the like can be used. Accordingly, the first image data can be transmitted from the image supply device 100a to the image display device 200a. Further, as the network camera protocol, for example, RTP (Real-time Transport Protocol) protocol or the like can be used. Thereby, it can be assumed that a network camera is mounted, and the image supply device 100a can receive the second image data from the image display device 200a as data captured by the camera.

Hereinafter, the operation of the image display system 4 will be described.
In the present embodiment, the screen transfer driver 11 in the image supply device 100a transfers the image data of the screen displayed by the presentation software program unit 10 to the network display host 12a as the first image data. The network display host 12a transmits the transferred first image data to the network display client 20a in the image display device 200a via the IP network communication path 110a. At this time, in the IP network communication of the present embodiment, when the screen displayed by the presentation software program unit 10 is updated and a difference occurs, the first image data is transmitted as a digital data format representing the update difference. Shall.

  The network display client 20a in the image display device 200a outputs the received first image data to the screen configuration unit 21. The operations of the screen configuration unit 21, the DAC unit 22, the external input unit 26, the image data input switching unit 27, the display unit 23, and the image data capture unit 24 are the same as those in the first to third embodiments. The image data capture unit 24 transfers the captured image data to the network camera host 25a as second image data. The network camera host 25a transmits the second image data as data virtually captured by the camera to the network camera client 13a in the image supply device 100a via the IP network communication path 110a. The network camera driver 14a acquires the second image data received by the network camera client 13a. The operations of the video conference software program unit 15, the network connection unit 16, the microphone 30, the audio input unit 17, the audio output unit 18, and the speaker 31 are the same as those in the third embodiment.

According to the fourth embodiment described above, the effects (1) to (2) in the first embodiment, the effects in the second embodiment, and the effects (1) in the third embodiment are the same. There is an effect. In addition, the following effects can be obtained.
(1) According to the image display system 4 of the present embodiment, since the network display protocol and the network camera protocol are supported together, the IP network communication path 110a as the connection means can simultaneously realize transmission and reception. it can. Therefore, the wiring of the image supply device 100a and the image display device 200a can be simplified because only one network cable is connected to each other. That is, the user can easily realize the image display system.

  (2) According to the image display system 4 of the present embodiment, since the network camera protocol is used, the video conference software program unit 15 can use the video conference software corresponding to the network camera. Therefore, commercially available general-purpose video conference software can be used. If the network camera is supported, videophone software using a network can also be used.

  The first to fourth embodiments of the present invention have been described above. However, the present invention is not limited to these embodiments, and can be implemented in various forms without departing from the gist of the present invention. Of course you can. A modification is described below.

  (Modification 1) In the above embodiment, the image display device 200 and the image display device 200a are projectors, but they may be rear projection televisions, liquid crystal displays, CRTs (Cathode Ray Tubes), PDPs (Plasma Display Panels), It is good also as an image display apparatus which has display parts, such as OLED (Organic * Light * Emitting * Diode) and FED (Field * Emission * Display).

  (Modification 2) In the first to third embodiments, the connection means between the image supply device 100 and the image display device 200 is the USB cable 110, but it may be a wireless WIRELESS USB (registered trademark). . In the fourth embodiment, the connection means between the image supply device 100a and the image display device 200a is the IP network communication path 110a. However, a wireless LAN may be used. In this way, since a cable is not used, wiring between devices is not necessary, and a simple and trouble-free image display system can be configured without limiting the installation location of the device.

  (Modification 3) In the first to fourth embodiments, digital data is transferred from the image supply device 100 or the image supply device 100a to the image display device 200 or the image display device 200a using a USB display or a network display. Although the first image data is transmitted in the format, the first image data is output in the analog data format from the image supply device 100 or the image supply device 100a, and the image display device 200 or the It is good also as what inputs into the image display apparatus 200a. For example, an analog RGB format may be used. The change in this case will be described with reference to FIG. 2. The communication path and communication unit of the first image data from the image supply device 100 to the image display device 200 are changed from USB to analog RGB. The first data transmission unit is an analog RGB output unit, and the first data reception unit is an analog RGB input unit. Further, the screen configuration unit 21 and the DAC unit 22 are not necessary, and the image data capture unit 24 may capture the input analog first image data. Thus, by transmitting the first image data in the analog data format, the processing load on the CPU of the image supply device 100 or the image supply device 100a can be reduced. Therefore, for example, it is suitable when a personal computer having a low CPU processing capacity is used as the image supply apparatus 100 or the image supply apparatus 100a.

  (Modification 4) In the third embodiment, the microphone 30 is connected to the image supply apparatus 100, but the microphone may be connected to or built in the image display apparatus 200. In this case, the microphone is a USB microphone and is mounted as a USB audio device. In other words, it is assumed that three functions of a USB display, a USB camera, and a USB audio are implemented simultaneously. As a result, a single USB cable 110 enables communication between the video of the USB display and the USB camera and the audio of the USB audio. Therefore, it is possible to realize an image display system that allows voice input by the image display apparatus 200 without adding wiring between the apparatuses. In this way, even when the image supply device 100 is installed at a location away from the presentation venue, the audio of the presentation venue is input by the microphone 30 of the image display device 200 installed at the presentation venue and a video conference is used. Can be distributed to third parties.

  (Modification 5) In the first to fourth embodiments, the projector that is the image display device 200 or the image display device 200a may be mounted with a camera mechanism such as a CCD camera. At this time, the CCD camera mounted on the projector images the screen projected by the projector and its surroundings. The captured image data is transferred as second image data to the USB camera device 25 or the network camera host 25a as the second data transmission unit by enabling the image data capture unit 24 to capture the image data. The USB camera device 25 or the network camera host 25a transmits the second image data to the image supply device 100 or the image supply device 100a. In this way, the CCD camera mounted on the projector, for example, simultaneously captures the screen displaying the presentation screen and the presenter explaining the content, and the image supply device 100 or the image supply device 100a The imaged image data can be acquired. Therefore, the user can acquire not only the presentation screen but also the presentation status including the presenter and record it as content or distribute it to a third party using a video conference.

1 is a configuration diagram of an image display system according to a first embodiment. The functional block diagram which shows the function structure of an image display system. The block diagram of the image display system which concerns on 2nd Embodiment. The functional block diagram which shows the function structure of an image display system. The block diagram of the image display system which concerns on 3rd Embodiment. The functional block diagram which shows the function structure of an image display system. The functional block diagram which shows the function structure of the image display system which concerns on 4th Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1-4 ... Image display system, 100 ... Image supply apparatus, 110 ... USB cable, 120 ... Connection cable, 200 ... Image display apparatus, 300 ... External image output apparatus, 400 ... Information processing apparatus, 500 ... Screen, 600 ... Network , 100a ... Image supply device, 110a ... IP network communication path, 200a ... Image display device, 10 ... Presentation software program part, 11 ... Screen transfer driver, 12 ... USB display host, 13 ... USB camera host, 14 ... USB camera driver 15 ... Video conferencing software program unit, 16 ... Network connection means, 17 ... Audio input unit, 18 ... Audio output unit, 20 ... USB display device, 21 ... Screen configuration unit, 22 ... DAC unit, 23 ... Display unit, 24 ... Image data capture unit, 5 ... USB camera device, 26 ... external input unit, 27 ... image data input switching unit, 30 ... microphone, 31 ... speaker, 12a ... network display host, 13a ... network camera client, 14a ... network camera driver, 20a ... network display Client, 25a ... Network camera host.

Claims (17)

An image display system comprising: an image supply device that supplies image data; and an image display device that is connected to the image supply device via a connection unit and that performs display based on the image data supplied from the image supply device. There,
The image supply device includes:
A first data transmission unit for transmitting first image data as the image data to the image display device;
A second data receiving unit for receiving second image data transmitted from the image display device;
With
The image display device includes:
A first data receiving unit for receiving the first image data transmitted from the image supply device;
A display unit for displaying the first image data;
An image data capture unit that captures the first image data and sets the second image data;
A second data transmission unit that transmits the second image data captured by the image data capture unit to the image supply device;
An image display system comprising: The image display system according to claim 1,
The image display device includes:
An external input unit for receiving image data of one or more external inputs;
An image data input switching unit that selects and switches at least one image data from the first image data and the externally input image data;
The display unit displays the image data selected by the image data input switching unit. The image display system according to claim 2,
The image display system, wherein the image data capture unit captures the image data selected by the image data input switching unit and uses the captured image data as the second image data. The image display system according to any one of claims 1 to 3,
An image display system characterized in that the connection means uses communication conforming to the USB standard. The image display system according to any one of claims 1 to 3,
An image display system characterized in that the connection means uses IP network communication. An image display system according to any one of claims 1 to 5,
The image supply apparatus includes a network connection unit that enables IP network communication for information communication used in addition to the connection unit with the image display device. The image display system according to claim 6,
The image supply system includes a software program unit for performing bidirectional simultaneous communication of audio data and video data as the information communication via the network connection unit. An image supply device in the image display system according to any one of claims 1 to 3,
An image supply apparatus comprising the first data transmission unit and the second data reception unit. An image supply device in the image display system according to claim 4,
The image supply device is connected to the image display device by connection means using communication conforming to the USB standard. An image supply device in the image display system according to claim 5,
The image supply device is connected to the image display device by connection means using the IP network communication. An image supply device in the image display system according to claim 6,
The image supply device includes the network connection unit that enables IP network communication for the information communication used in addition to the connection unit with the image display device. An image supply device in the image display system according to claim 7,
The image supply apparatus includes the software program unit for performing bidirectional simultaneous communication of audio data and video data as the information communication via the network connection unit. An image display device in the image display system according to claim 1,
An image display device comprising: the first data receiving unit, the display unit, the image data capturing unit, and the second data transmitting unit. An image display device in the image display system according to claim 2,
The external input unit, and the image data input switching unit,
The display unit displays the image data selected by the image data input switching unit. An image display device in the image display system according to claim 3,
The image display device is characterized in that the image data capture unit captures image data selected by the image data input switching unit and uses the captured image data as the second image data. An image display device in the image display system according to claim 4,
The image display device is connected to the image supply device by connection means using communication conforming to the USB standard. An image display device in the image display system according to claim 5,
The image display device is connected to the image supply device by connection means using the IP network communication.

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