Patent Publication Number: US-11042343-B2

Title: Data transfer system, display device, portable information terminal, and data transfer method

Description:
The present application is a Continuation Application of U.S. patent application Ser. No. 15/305,017, filed on Oct. 18, 2016, which is based on International Patent Application No. PCT/JP2014/062830, filed on May 14, 2014, the entire contents of which are incorporated herein by reference. 
    
    
     TECHNICAL FIELD 
     The present invention relates to a data transfer system, a display device, a portable information terminal, a data transfer method, and a program for transferring data between a portable information terminal and a display device including a display panel. 
     BACKGROUND ART 
     A data transfer system transfers data between a display device and a portable information terminal (see Patent Literature 1). The data transfer system described in Patent Literature 1 directly connects the display device and the portable information terminal, and data is transmitted and received between the display device and the portable information terminal. 
     DOCUMENTS OF THE PRIOR ART 
     Patent Literature 
     [Patent Literature 1] Japanese Unexamined Patent Application, First Publication No. 2011-90477 
     DISCLOSURE OF INVENTION 
     Problem to be Solved by the Invention 
     As disclosed in the above-mentioned Patent Literature 1, in order to transfer data between the display device and the portable information terminal, it is only necessary to directly connect the display device and the portable information terminal and perform transmission/reception of data. However, a cable connection, a wireless pairing manipulation, or the like is necessary to directly connect the display device and the portable information terminal and settings are complicated. 
     An objective of the present invention is to provide a data transfer system, a display device, a portable information terminal, a data transfer method, and a program capable of transferring data between a display device and a portable information terminal without a cable connection, a wireless pairing manipulation, or the like between the portable information terminal and the display device being performed. 
     Means for Solving the Problem 
     A data transfer system of a first aspect of the present invention includes a display device and a portable information terminal, the display device including: a first display panel having a first display screen for displaying an image; a terminal detection unit configured to detect that the portable information terminal has approached the first display screen; and a first display processing unit configured to cause the first display screen to display a storage location image which is an image indicating information about a storage location of data in another when the approach of the portable information terminal is detected by the terminal detection unit. 
     Also, a display device of a second aspect of the present invention is the display device included in a data transfer system including a portable information terminal and the display device, the display device including a first display panel having a first display screen for displaying an image, a terminal detection unit configured to detect that the portable information terminal has approached the first display screen, and a first display processing unit configured to cause the first display screen to display a storage location image which is an image indicating information about a storage location of data in another device when the terminal detection unit detects that the portable information terminal has approached the first display screen. 
     Also, a portable information terminal of a third aspect of the present invention is the portable information terminal included in a data transfer system including a display device and the portable information terminal, the portable information terminal including an imaging unit, and an information acquisition unit configured to acquire information about a storage location of data in another device on the basis of a storage location image captured by the imaging unit, wherein the storage location image is an image indicating information about the storage location of the data and is displayed on a display screen of the display device when the portable information terminal has approached the display screen. 
     Also, a data transfer method of a fourth aspect of the present invention is a data transfer method used in a data transfer system including a display device and a portable information terminal, wherein the display device includes a first display panel having a first display screen for displaying an image and a terminal detection unit configured to detect that the portable information terminal has approached the first display screen, the data transfer method including the step of: causing the first display screen to display a storage location image which is an image indicating information about a storage location of data in another device when the approach of the portable information terminal is detected by the terminal detection unit. 
     Effect of the Invention 
     According to the present invention, there is an advantage in that it is possible to transfer data between a display device and a portable information terminal without a cable connection, a wireless pairing manipulation, or the like between the portable information terminal and the display device being performed. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is an explanatory diagram illustrating a schematic configuration of a data transfer system of the present invention. 
         FIG. 2A  is an explanatory diagram illustrating a first arrangement example of a portable information terminal  100  in the data transfer system  1 . 
         FIG. 2B  is an explanatory diagram illustrating a second arrangement example of the portable information terminal  100  in the data transfer system  1 . 
         FIG. 3A  is an explanatory diagram illustrating a drag-and-drop manipulation of data in a display device  200 . 
         FIG. 3B  is an explanatory diagram illustrating a drag-and-drop manipulation of data in the portable information terminal  100 . 
         FIG. 4  is a configuration diagram illustrating a configuration example of the portable information terminal  100 , the display device  200 , and a cloud server  300  in the data transfer system  1 . 
         FIG. 5  is a flowchart illustrating an overview of a data transmission/reception process performed in the data transfer system  1 . 
         FIG. 6  is a sequence diagram illustrating a flow of a connection process between the portable information terminal  100  and the display device  200 . 
         FIG. 7  is a sequence diagram illustrating a flow of a disconnection process between the portable information terminal  100  and the display device  200 . 
         FIG. 8  is a sequence diagram illustrating a flow of a process of transmitting data of the display device  200  to the portable information terminal  100 . 
         FIG. 9  is a sequence diagram illustrating a flow of a process of transmitting data of the cloud server  300  to the portable information terminal  100 . 
         FIG. 10  is a sequence diagram illustrating a flow of a process of transmitting data of the portable information terminal  100  to the display device  200 . 
         FIG. 11  is an explanatory diagram illustrating an example in which the data transfer system of the present invention is applied to a projector. 
     
    
    
     EMBODIMENTS FOR CARRYING OUT THE INVENTION 
     Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to the following embodiments. For example, components of the embodiments may be appropriately combined. 
       FIG. 1  is an explanatory diagram illustrating a schematic configuration of a data transfer system of the present invention. 
     In a data transfer system  1  of the present invention, a portable information terminal  100  manipulated by a user U 1  and a display device  200  manipulated by a user U 2  transfer data using a cloud service  301 . The portable information terminal  100  includes an imaging unit such as a CCD camera, and the display device  200  includes a display screen having a touch panel such as an optical touch panel. This display device  200  may be a tablet terminal or a desktop personal computer as well as a notebook personal computer. 
     In this data transfer system  1 , the portable information terminal  100  is arranged on a touch panel type display screen  202  of the display device  200  or the portable information terminal  100  is arranged in proximity to the display screen  202  of the display device  200 , so that the portable information terminal  100  and the display device  200  automatically cooperate with each other. The portable information terminal  100  and the display device  200  in cooperation with each other perform the transmission/reception of data via the cloud service  301 . 
     Also, the number of sets of portable information terminals  100  and display devices  200  in cooperation with each other may be two or more. 
     Also, data transmitted via the cloud service  301  also includes data of a non-file format (for example, streaming type moving-image data) as well as data of a file format. 
     Services provided by cloud computing are collectively referred to as the above-mentioned cloud service  301 , and a plurality of cloud servers  300   a ,  300   b , . . . ,  300   c  cooperate with one another and are formed as a single computer resource referred to as a cloud. 
     Also, an example in which the plurality of cloud servers  300   a ,  300   b , . . . ,  300   c  are in cooperation with one another to provide the cloud service  301  is illustrated in  FIG. 1 , but the provision of the cloud service  301  may be performed by one cloud server. Also, in the following description, the plurality of cloud servers  300   a ,  300   b , . . . ,  300   c  are referred to as a “cloud server  300 .” 
     In the above-mentioned data transfer system  1 , uniform resource locator (URL) information including a storage location of data in the cloud server  300  (another device) or the like is displayed as image information (a storage location image) on the display screen  202  (a first display screen) when the display device  200  detects the approach of the portable information terminal  100 . For example, the display device  200  transmits the URL information or the like to the portable information terminal  100  by displaying an image displayed on the display screen while changing a luminance value according to the passage of time (hereinafter also referred to as “blinking display”). For example, the display device  200  can transmit the URL information or the like to the portable information terminal  100  by pre-coding a combination of lengths of time for which the light is on and off when blinking display of the image is performed. 
     The portable information terminal  100  captures image information displayed on the display screen  202  and acquires the URL information or the like indicating the storage location of the data in the cloud server  300  from the captured image information. The portable information terminal  100  acquires data stored in the cloud server  300  on the basis of the URL information indicating the storage location of the data. Alternatively, the portable information terminal  100  transmits the data to the cloud server  300  on the basis of the URL information indicating the storage location of the data and causes the cloud server  300  to store the transmitted data. 
     Thus, the display device  200  can transmit information to the portable information terminal  100  by displaying the image information on the display screen  202 . Thus, the data transfer system  1  can transfer the data between the portable information terminal  100  and the display device  200  via the cloud server  300  without a cable connection, a wireless pairing manipulation, or the like being performed. 
       FIG. 2A  is an explanatory diagram illustrating a first arrangement example of a portable information terminal  100  in the data transfer system  1 , and illustrates an example in which the portable information terminal  100  is directly arranged on the touch panel type display screen  202  in the display device  200 . 
     As illustrated in  FIG. 2A , for example, by arranging the portable information terminal  100  on the touch panel type display screen  202 , the display device  200  detects that the portable information terminal  100  is arranged on the display screen  202 . The display device  200  displays a window  203  in a circular area surrounding the portable information terminal  100  arranged on the display screen  202 . Also, when the portable information terminal  100  is removed from the display screen  202 , the display device  200  removes the display of the circular window  203 . Also, the circular window  203  is not limited to a circular shape, and may be an oval shape or a polygonal shape. Also, the circular window  203  may be simply referred to as the “window  203 .” 
     Thus, the display device  200  detects an operation of placing the portable information terminal  100  on the touch panel type display screen  202  and an operation of removing the portable information terminal  100  from the touch panel type display screen  202  and can link these operations with activation and termination manipulations of a data transmission application. Thus, the activation and termination manipulations of the data transmission application can be simplified. 
     Also, when the portable information terminal  100  is arranged on the touch panel type display screen  202 , the detection of the shape and the location of the portable information terminal  100  is possible regardless of the shape (size) or location of the portable information terminal  100  arranged on the display screen  202 . 
     Also, when information is transmitted to the portable information terminal  100  by causing blinking display of the window  203  to be performed, the display device  200  can use a short URL displayed by shortening the display of the URL as URL information indicating the storage location of the data in the cloud service  301  to reduce an amount of information to be transmitted. 
     Thus, because the display device  200  transmits information to the portable information terminal  100  by the blinking display of the window  203 , communication is possible even when the focus of a CCD camera of the imaging unit is not adjusted in a state in which the portable information terminal  100  is placed on the display screen  202 . 
     Also, for example, by generating the window  203  displayed at a terminal position on the display screen  202  in a circular shape, a communication error due to detection deviation of the terminal position is prevented and unnecessary areal occupation on the display screen  202  is prevented, so that the inhibition of a file movement manipulation can be avoided. 
       FIG. 2B  is an explanatory diagram illustrating a second arrangement example of the portable information terminal  100  in the data transfer system  1 .  FIG. 2B  illustrates an example in which the portable information terminal  100  is arranged at a predetermined position A on the surface of a manipulation unit side on which a keyboard or the like is arranged in a display device  200 A. 
     As illustrated in  FIG. 2B , when the portable information terminal  100  is arranged at the predetermined position A of the manipulation unit side, the user arranges the portable information terminal  100  so that the imaging unit (not illustrated) faces the direction of the display screen  202 . The display device  200 A detects that the portable information terminal  100  is arranged at the predetermined position A with a sensor (for example, a pressure sensor or the like). Thereby, the display device  200 A detects that the portable information terminal  100  is arranged in proximity to the display screen  202 , and an image  204  indicating that the portable information terminal  100  is detected and the window  203  in the circular area surrounding the image  204  are displayed in a predetermined area on the display screen  202 . Also, when the portable information terminal  100  is removed from the predetermined position A, the display device  200 A deletes the image  204  and the circular window  203  displayed on the display screen  202 . 
     The display device  200 A detects an operation of placing the portable information terminal  100  in proximity to the touch panel type display screen  202  and an operation of removing the portable information terminal  100  from the touch panel type display screen  202 , and can link these operations with activation and termination manipulations of a data transmission application. Thus, the activation and termination manipulations of the data transmission application can be simplified. Also, the display screen  202  is formed as the touch panel type display screen in the display device  200 A as well. 
     Also, the display device  200  illustrated in  FIG. 2A  and the display device  200 A illustrated in  FIG. 2B  are different in terms of only a method of arranging the portable information terminal  100  and a method of detecting the portable information terminal  100  and are the same in terms of other basic operations. Thus, the display device  200  and the display device  200 A are collectively referred to as the display device  200 . When it is necessary to specifically distinguish the display device  200 A, it is referred to as the display device  200 A. 
       FIG. 3A  is an explanatory diagram illustrating a drag-and-drop manipulation of data in the display device  200 . 
     As illustrated in  FIG. 3A , for example, an image  205  indicating data serving as a target to be transmitted to the portable information terminal  100  is displayed on the display screen  202  which is a desktop screen or a manipulation screen for performing a file manipulation of an explorer or the like in the display device  200 . The user drags the image  205  in a direction indicated by an arrow A according to a manipulation using a mouse or the like or a touch manipulation and drops the image  205  on the circular window  203  or drops the image  205  on an area in the vicinity thereof, and the transmission of data from the display device  200  to the portable information terminal  100  via the cloud server  300  starts. 
     Thus, because the transmission of data starts according to the drag-and-drop manipulation on the display screen  202  in the display device  200 , a simple and intuitive manipulation is possible for the user. 
       FIG. 3B  is an explanatory diagram illustrating a drag-and-drop manipulation of data in the portable information terminal  100 . As illustrated in  FIG. 3B , the portable information terminal  100  displays an image  103  indicating data serving as a target to be transmitted to the display device  200  as its own stored data on the display screen  102 . The user drags the image  103  in an out-of-frame direction indicated by the arrow A according to the touch manipulation and therefore the transmission of data from the portable information terminal  100  to the display device  200  via the cloud server  300  starts. 
     Alternatively, an image  104  indicating the display device  200  is displayed on the display screen  102 . The user drags the image  103  in a direction indicated by an arrow B according to the touch manipulation and drops the image  103  on an image  104  indicating the display device  200  or in an area in the vicinity thereof, and the transmission of data from the portable information terminal  100  to the display device  200  via the cloud service  301  starts. 
     Thus, because the transmission of data is started by the drag-and-drop manipulation on the display screen  102  in the portable information terminal  100 , a simple and intuitive manipulation is possible for the user. 
       FIG. 4  is a configuration diagram illustrating a configuration example of the portable information terminal  100 , the display device  200 , and the cloud server  300  in the data transfer system  1 . In  FIG. 4 , only parts directly related to the present invention are illustrated for the portable information terminal  100 , the display device  200 , and the cloud server  300 . 
     [Configuration of Portable Information Terminal  100 ] 
     In the data transfer system  1  illustrated in  FIG. 4 , the portable information terminal  100  includes a second display panel  101 , a display screen  102 , a communication processing unit  111 , a data input/output processing unit  112 , a display processing unit  113 , a manipulation detection unit  114 , an image information acquisition unit  115 , an imaging unit  116 , and a storage unit  121 . 
     The second display panel  101  includes the display screen  102  (a second display screen) and the display screen  102  is a touch panel type display screen constituted of a liquid crystal display panel and a touch panel arranged on a display surface of the liquid crystal display panel. The touch panel is, for example, an optical touch panel. The user performs a touch manipulation on the touch panel, and the display screen  102  detects a position at which the touch manipulation is performed. 
     The communication processing unit  111  transmits and receives data to and from the cloud server  300  via the communication network  10 . 
     The imaging unit  116  includes a CCD camera, etc. and captures a window  203  displayed on the display screen  202  of the display device  200  as image information. 
     The image information acquisition unit  115  (an information acquisition unit) acquires URL information indicating a storage location of data stored in the cloud server  300  on the basis of the image information captured by the imaging unit  116 . Also, instruction information about a data storage instruction issued from the display device  200  or the like is acquired. 
     The data input/output processing unit  112  (a second input/output processing unit) acquires data from the cloud server  300  on the basis of URL information indicating the storage location of the data stored in the cloud server  300 . Also, the data input/output processing unit  112  transmits its own stored data to the cloud server  300  and causes the cloud server  300  to store the transmitted data. 
     As illustrated in  FIG. 3B , the display processing unit  113  (a second display processing unit) causes the image  103  indicating data serving as a target to be transmitted to the display device  200  as its own stored data to be displayed at a predetermined position on the display screen  102  and causes a predetermined image  104  indicating the display device  200  to be displayed at a predetermined position on the display screen  102 . 
     The manipulation detection unit  114  (a second manipulation detection unit) detects a manipulation of moving the image  103  indicating data displayed on the display screen  102  by a touch manipulation. For example, as illustrated in  FIG. 3B , the manipulation detection unit  114  detects that the image  103  is dragged in the out-of-frame direction by the touch manipulation. The manipulation detection unit  114  detects that an operation is performed in a manner that the image  103  is dragged by the touch manipulation and dropped on the image  104  indicating the display device  200  or on an area in the vicinity thereof. 
     [Configuration of Display Device  200 ] 
     The display device  200  includes a first display panel  201 , a communication processing unit  211 , a terminal detection unit  212 , a display processing unit  213  (a first display processing unit), an instruction information generation unit  214 , a manipulation detection unit  215 , a data input/output processing unit  216  (a first input/output processing unit), and a storage unit  221 . 
     The first display panel  201  includes the display screen  202  (a first display screen), and the display screen  202  is a touch panel type display screen constituted of a liquid crystal display panel and a touch panel arranged on a display surface of the liquid crystal display panel. The touch panel is, for example, an optical touch panel. When the user performs a touch manipulation on the touch panel, the display screen  102  detects a position at which the touch manipulation is performed. 
     The communication processing unit  211  transmits and receives data to and from the cloud server  300  via the communication network  10 . 
     The terminal detection unit  212  detects that the portable information terminal  100  is arranged in proximity to the display screen  202 . For example, the terminal detection unit  212  detects that the portable information terminal  100  is arranged on the touch panel type display screen  202 . Alternatively, in the case of the display device  200 A (see  FIG. 2B ), the terminal detection unit  212  detects that the portable information terminal  100  is arranged at a predetermined position in proximity to the display screen  202 . 
     The display processing unit  213  (the first display processing unit) displays image information to be transmitted toward the portable information terminal  100  on the display screen  202  (the first display screen). The display processing unit  213  displays the window  203  indicating that the portable information terminal  100  is detected in an area on the display screen  102  according to a position of the portable information terminal  100  when the terminal detection unit  212  detects that the portable information terminal  100  is arranged in proximity to the display screen  202 . Alternatively, in the case of the display device  200 A, as illustrated in  FIG. 2B , the display processing unit  213  displays the window  203  indicating that the portable information terminal  100  is detected in a predetermined area on the display screen  102  according to a position A of the portable information terminal  100 . 
     Also, in the display processing unit  213 , the instruction information generation unit  214  generates “storage instruction information” including URL information about a storage location of data stored in the cloud server  300 , and the display processing unit  213  changes a luminance value of an image displayed in the window  203  (image information) to indicate the “storage instruction information” in response to the passage of time, and transmits the generated “storage instruction information” toward the portable information terminal  100 . That is, the display processing unit  213  transmits information toward the portable information terminal  100  by causing blinking display of the window  203  to be performed. 
     Also, as illustrated in  FIG. 3A , the display processing unit  213  (the first display processing unit) causes an image  205  (a first data image) indicating data (first data) serving as a target to be transmitted to the portable information terminal  100  to be displayed at a predetermined position on the display screen  202  (the first display screen). The manipulation detection unit  215  (a first manipulation detection unit) detects that a manipulation (a first manipulation) in which the image  205  is subjected to the drag-and-drop manipulation and moved toward an area (a first area) in which the window  203  is displayed is performed on the display screen  202 . 
     The movement of the image indicating the data may be performed by the drag-and-drop manipulation by the manipulation input device such as the mouse or the drag-and-drop manipulation may be performed by the touch manipulation of the touch panel on the display screen  202 . 
     When the manipulation detection unit  215  detects a manipulation (the first manipulation) of moving the image  205  indicating the data to the area (the first area) of the window  203 , the instruction information generation unit  214  generates “storage instruction information” including URL information about a storage location of data stored in the cloud server  300  and information for issuing an instruction for storing the data. The display processing unit  213  (an instruction image display unit) transmits the “storage instruction information” (an instruction image) generated by the instruction information generation unit  214  to the portable information terminal  100  by causing blinking display of the window  203  to be performed. 
     When the display device  200  transmits its own stored data to the portable information terminal  100 , the data input/output processing unit  216  (the first input/output processing unit) transmits its own stored data to the cloud server  300  and causes the transmitted data to be stored in the cloud server  300  (a storage location). In this case, the display processing unit  213  transmits “storage instruction information” including URL information about the storage location of the data transmitted to the cloud server  300  and stored in the cloud server  300  to the portable information terminal  100  by causing blinking display of the window  203  on the display screen  202  to be performed. Also, the data input/output processing unit  216  receives data transmitted from the portable information terminal  100  to the cloud server  300  via the cloud server  300 . 
     [Configuration of Cloud Server  300 ] 
     The cloud server  300  includes a communication processing unit  311 , a data input/output processing unit  312 , and a storage unit  321 . 
     The communication processing unit  311  performs the transmission/reception of data between the portable information terminal  100  and the display device  200  via the communication network  10 . 
     The data input/output processing unit  312  receives data from the display device  200 , stores the received data in the data area  322 , and notifies the display device  200  of the URL information indicating the storage location of the stored data. Also, the data input/output processing unit  312  receives data from the portable information terminal  100 , stores the received data in the data area  322 , and notifies the display device  200  of the URL information indicating the storage location of the stored data. 
     Also, the data input/output processing unit  312  receives a data transmission request from the portable information terminal  100  and the display device  200  and transmits the data stored in the data area  322  or its own stored data to the portable information terminal  100  or the display device  200  transmitting the data transmission request. 
     [Flow of Process in Data Transfer System  1 ] 
       FIG. 5  is a flowchart illustrating an overview of a data transmission/reception process performed in the data transfer system  1 . Hereinafter, the flow of the process will be described with reference to  FIG. 5 . 
     First, when the portable information terminal  100  is arranged at a position close to the display screen  202  of the display device  200  and the process starts (step S 10 ), the portable information terminal  100  and the display device  200  perform a connection process for cooperation with each other (step S 20 ). Details of the connection process will be described below. 
     When the connection process between the display device  200  and the portable information terminal  100  is completed, a process of transmitting and receiving data between the display device  200  and the portable information terminal  100  is performed via the cloud server  300  (step S 30 ). In the data transmission/reception process in step S 30 , data may be transmitted from the display device  200  to the portable information terminal  100  via the cloud server  300  as a first case (case  1 ). Also, as a second case (case  2 ), data may be transmitted from the cloud server  300  to the portable information terminal  100 . Also, as a third case (case  3 ), data may be transmitted from the portable information terminal  100  to the display device  200  via the cloud server  300 . The portable information terminal  100 , the display device  200 , and the cloud server  300  execute a process corresponding to each case mentioned above. Details of the process to be performed in each of the first case, the second case, and the third case will be described below. 
     Also, the data to be transmitted via the cloud server  300  also includes data of a non-file format (for example, streaming type moving-image data) as well as data of a file format. 
     When the data transmission/reception process in step S 30  ends, the portable information terminal  100  and the display device  200  perform a disconnection process for ending cooperation (step S 40 ). Details of the disconnection process will be described below. 
     After the disconnection process of step S 40  is performed, the portable information terminal  100  and the display device  200  end the data transmission/reception process (step S 50 ). 
       FIG. 6  is a sequence diagram illustrating a flow of a connection process between the portable information terminal  100  and the display device  200 . The sequence diagram illustrated in  FIG. 6  illustrates a detailed flow of the connection process of step S 20  of the flowchart illustrated in  FIG. 5 . Also, the connection process illustrated in  FIG. 6  illustrates the flow of the connection process when the portable information terminal  100  is arranged on the touch panel type display screen  202  (see  FIG. 2A ), but a similar process is performed when it is detected that the portable information terminal  100  is arranged at a predetermined position in proximity to the display screen  2002  (see  FIG. 2B ). 
     Hereinafter, the flow of the connection process between the portable information terminal  100  and the display device  200  will be described with reference to  FIG. 6 . 
     Start of the process in the portable information terminal  100  becomes possible (step S 101 ) and the portable information terminal  100  is arranged on the display screen  202  (step S 102 ). 
     Next, in the display device  200 , the terminal detection unit  212  detects that the portable information terminal  100  is arranged on the display screen  202  (step S 103 ), and the display processing unit  213  displays a circular window  203  indicating that the portable information terminal  100  is detected in an area of the display screen  202  according to the position of the portable information terminal  100  (step S 104 ). 
     As illustrated in  FIG. 2B , in a case that it is detected that the portable information terminal  100  is arranged at a predetermined position A in proximity to the display screen  202 , the above-mentioned step S 102  becomes an operation in which the portable information terminal  100  is arranged at the predetermined position A of the display device  200 A. In the same case, the process of the above-mentioned step S 103  becomes a process in which the terminal detection unit  212  detects that the portable information terminal  100  is arranged at the predetermined position A of the display device  200 A. Also in the same case, the process of the above-mentioned step S 104  becomes a process of displaying the circular window  203  indicating that the portable information terminal  100  is detected in a preset predetermined area on the display screen  202 . 
     Next, the data input/output processing unit  216  transmits “data area generation instruction information” for issuing an instruction for securing the data area  322  in the storage unit  321  to the cloud server  300  (step S 105 ). This data area  322  is used when the transmission/reception of data is performed between the portable information terminal  100  and the display device  200 . 
     Next, when the cloud server  300  receives the “data area generation instruction information” from the display device  200 , the data input/output processing unit  312  generates the data area  322  in the storage unit  321  (step S 106 ). Next, the data input/output processing unit  312  transmits “data area generation completion information” indicating that the data area  322  is generated in the storage unit  321  to the display device  200  (step S 107 ). This “data area generation completion information” includes “URL information about the data area” indicating a location of the data area  322 . 
     Next, when the display device  200  receives the “data area generation completion information” indicating that the data area  322  is generated from the cloud server  300 , the instruction information generation unit  214  generates “storage instruction information” including the “URL information about the data area.” Next, the display processing unit  213  transmits the “storage instruction information” to the portable information terminal  100  by causing blinking display of the window  203  to be performed (step S 108 ). 
     Next, the portable information terminal  100  reads the blinking display of the window  203 , that is, a temporal change of a luminance value, with the CCD camera of the imaging unit  116  and receives the “storage instruction information” transmitted from the display device  200  (step S 109 ). 
     By executing the process of step S 109 , the connection process between the portable information terminal  100  and the display device  200  is completed (step S 110 ). 
     Thus, when it is detected that the portable information terminal  100  has been arranged on the display screen  202  or it is detected that the portable information terminal  100  has been arranged at a predetermined position in proximity to the display screen  202 , the display device  200  can link the detection with a manipulation of starting a data transmission application. Thus, it is possible to simplify the manipulation of starting the data transmission application. 
       FIG. 7  is a sequence diagram illustrating a flow of a disconnection process between the portable information terminal  100  and the display device  200 . The flowchart illustrated in  FIG. 7  illustrates a detailed flow of the disconnection process of step S 40  of the flowchart illustrated in  FIG. 5 . 
     Also, the disconnection process illustrated in  FIG. 7  shows a flow of the disconnection process when the portable information terminal  100  (see  FIG. 2A ) arranged on the display screen  202  is removed, but a similar process is performed when the portable information terminal  100  (see  FIG. 2B ) arranged at a predetermined position in proximity to the display screen  202  is removed. 
     Hereinafter, the flow of the disconnection process between the portable information terminal  100  and the display device  200  will be described with reference to  FIG. 7 . 
     Start of the disconnection process becomes possible (step S 201 ) and the portable information terminal  100  is removed from the display screen  202  (step S 202 ). 
     Next, in the display device  200 , the terminal detection unit  212  detects that the portable information terminal  100  is removed from the display screen  202  (step S 203 ) and the display processing unit  213  deletes the display of the window  203  on the display screen  202  (step S 204 ). 
     Also, as illustrated in  FIG. 2B , in a case that it is detected that the portable information terminal  100  is arranged at the predetermined position A in proximity to the display screen  202 , the above-mentioned step S 202  becomes an operation in which the portable information terminal  100  is removed from the predetermined position A of the display device  200 A. In the same case, the process of the above-mentioned step S 203  is a process in which the terminal detection unit  212  detects that the portable information terminal  100  is removed from the predetermined position A of the display device  200 A. Also in the same case, the process of the above-mentioned step S 204  becomes a process of deleting the window  203  displayed in the predetermined area on the display screen  202 . 
     Next, the data input/output processing unit  216  transmits “data area deletion instruction information” for issuing an instruction for deleting the data area  322  used when the transmission/reception of data is performed by the portable information terminal  100  and the display device  200  from the storage unit  321  to the cloud server  300  (step S 205 ). 
     Next, when the cloud server  300  receives the “data area deletion instruction information” from the display device  200 , the data input/output processing unit  312  deletes the data of the data area  322  in the storage unit  321  (step S 206 ) and also deletes the data area  322  (step S 207 ). 
     Next, the data input/output processing unit  312  of the cloud server  300  transmits the “data area deletion completion information” indicating that the deletion of the data area  322  is completed to the display device  200  (step S 208 ). After the transmission process of the “data area deletion completion information” of step S 208  is executed, the cloud server  300  ends the disconnection process (step S 209 ). 
     Next, when the display device  200  receives “deletion completion information” indicating that the data area  322  is deleted from the cloud server  300  (step S 210 ), the display device  200  ends the disconnection process (step S 211 ). 
     On the other hand, when the display of the window  203  is deleted in the display device  200 , the image information acquisition unit  115  detects that a luminance change of the window  203  read by the imaging unit  116  stops for a fixed time in the portable information terminal  100  (step S 212 ) and upload and download of data to and from the cloud server  300  stop (step S 213 ). After the process of step S 213  is executed, the portable information terminal  100  ends the disconnection process (step S 214 ). 
     Thus, when it is detected that the portable information terminal  100  has been removed from the touch panel type display screen  202  or it is detected that the portable information terminal  100  has been removed from a predetermined position in proximity to the display screen  202 , the display device  200  can link the detection with a manipulation of stopping a data transmission application. Thus, it is possible to simplify the operation of stopping the data transmission application. 
     Further, every time the portable information terminal  100  is arranged on or near the display screen, the data area  322  for storing data to be moved between the display device  200  and the portable information terminal  100  is generated on the cloud server  300 . Simultaneously, every time the portable information terminal  100  is removed, the data area  322  and the data stored therein are deleted each time. Therefore, it is possible to avoid the leakage of information from the cloud server  300 . 
       FIG. 8  is a sequence diagram illustrating a flow of a process of transmitting data of the display device  200  to the portable information terminal  100 . The sequence diagram illustrated in  FIG. 8  illustrates a detailed flow of the process of case  1 , that is, a process of transmitting data stored in the display device  200  to the portable information terminal  100  via the cloud server  300 , in the process of step S 30  of the flowchart illustrated in  FIG. 5 . Hereinafter, the flow of the process will be described with reference to  FIG. 8 . 
     First, start of a process of transmitting data in the display device  200  becomes possible (step S 301 ), the user performs the drag-and-drop manipulation of the image  205  (see  FIG. 3A ) indicating data to be moved on the display screen  202 , and the manipulation detection unit  215  detects that a data movement instruction is issued (step S 302 ). The data movement instruction on the display screen  202  is issued by the drag-and-drop manipulation using the mouse or the like or the drag-and-drop manipulation based on the touch manipulation on the touch panel of the display screen  202 . 
     Next, the data input/output processing unit  216  of the display device  200  uploads the data to be moved to the cloud server  300  (step S 303 ). 
     Next, the data input/output processing unit  312  of the cloud server  300  receives data uploaded from the display device  200  (step S 304 ) and stores the received data in the data area  322 . 
     Next, the data input/output processing unit  312  of the cloud server  300  transmits “reception completion information” including information indicating that data uploaded from the display device  200  is stored in the data area  322  and URL information indicating a storage location of data to the display device  200  (step S 305 ). 
     Next, when the display device  200  receives the “reception completion information” from the cloud server  300 , the display processing unit  213  causes blinking display of the window  203  on the display screen  202  to be performed and transmits “download instruction information” indicating a download instruction including the URL information indicating the storage location of the data to the portable information terminal  100  (step S 306 ). 
     Next, the portable information terminal  100  reads the blinking display of the window  203  on the display screen  202  of the display device  200 , that is, a temporal change of a luminance value of the window  203 , with the imaging unit  116 , and the image information acquisition unit  115  receives the “download instruction information” (step S 307 ). 
     Next, the data input/output processing unit  112  of the portable information terminal  100  is linked to the cloud server  300  on the basis of URL information and transmits “data request information” for requesting the transmission of data stored in the data area  322  to the cloud server  300  (step S 308 ). 
     Next, when the cloud server  300  receives the “data request information” from the portable information terminal  100  (step S 309 ), the data input/output processing unit  312  transmits the data stored in the data area  322  of the storage unit  321  to the portable information terminal  100  (step S 310 ). 
     Next, the portable information terminal  100  downloads data to be transmitted from the cloud server  300  with the data input/output processing unit  112  and stores the downloaded data in the storage unit  121  (step S 311 ). After the process of step S 312  is executed, the portable information terminal  100  ends the transmission/reception process of data between the portable information terminal  100  and the display device  200  (step S 312 ). 
     Through the procedure of the above-mentioned processes, the display device  200  can store its own stored data in the portable information terminal  100  via the cloud server  300  by a simple method using the drag-and-drop manipulation. 
       FIG. 9  is a sequence diagram illustrating a flow of a process of transmitting data of the cloud server  300  to the portable information terminal  100 . The sequence diagram illustrated in  FIG. 9  illustrates a detailed flow of the process of case  2 , that is, a process of transmitting data stored in the cloud server  300  to the portable information terminal  100 , in the process of step S 30  of the flowchart illustrated in  FIG. 5 . Hereinafter, the flow of the process will be described with reference to  FIG. 9 . 
     First, when start of a process of transmitting data in the display device  200  becomes possible (step S 401 ), the user performs the drag-and-drop manipulation of the image  205  (see  FIG. 3A ) indicating data to be moved on the display screen  202 , and the manipulation detection unit  215  detects that a data movement instruction is issued (step S 402 ). The data movement instruction on the display screen  202  is issued by the drag-and-drop manipulation using the mouse or the like or the drag-and-drop manipulation by the touch manipulation on the touch panel of the display screen  202 . 
     Next, the data input/output processing unit  216  of the display device  200  transmits “link request information” indicating a link request for data to be moved to the cloud server  300  (step S 403 ). 
     Next, when the data input/output processing unit  312  of the cloud server  300  receives the “link request information” from the display device  200  (step S 404 ), “link information” indicating permission of a link for the data and URL information about a link destination is transmitted to the display device  200  (step S 405 ). 
     Next, when the display device  200  receives the “link information” from the cloud server  300  (step S 406 ), the data input/output processing unit  216  transmits the “link information” received from the cloud server  300  to the portable information terminal  100  (step S 407 ). The transmission of the “link information” is performed by the display processing unit  213  causing blinking display of the window  203  on the display screen  202  to be performed. 
     Next, the portable information terminal  100  reads the blinking display of the window  203  on the display screen  202  of the display device  200 , that is, a temporal change of a luminance value of the window  203 , with the imaging unit  116 , and the image information acquisition unit  115  receives the “link information” from the display device  200  (step S 408 ). 
     Next, the data input/output processing unit  112  of the portable information terminal  100  transmits “data request information” for requesting the cloud server  300  to transmit data to be moved to the cloud server  300  on the basis of the “link information” received from the display device  200  (step S 409 ). 
     Next, when the cloud server  300  receives the “data request information” from the portable information terminal  100  (step S 410 ), the data input/output processing unit  312  extracts requested data from the storage unit  321  and transmits the extracted data to the portable information terminal  100  (step S 411 ). 
     Next, the portable information terminal  100  downloads data transmitted from the cloud server  300  with the data input/output processing unit  112  and stores the downloaded data in the storage unit  121  (step S 412 ). After the process of step S 412  is executed, a process of transmitting and receiving data between the cloud server  300  and the portable information terminal  100  ends (step S 413 ). 
     Through the procedure of the above-mentioned processes, the display device  200  can cause the portable information terminal  100  to store the data stored in the cloud server  300  by a simple method using the drag-and-drop manipulation. 
       FIG. 10  is a sequence diagram illustrating a flow of a process of transmitting data of the portable information terminal  100  to the display device  200 . The sequence diagram illustrated in  FIG. 10  illustrates a detailed flow of the process of case  3 , that is, a process of transmitting data stored in the portable information terminal  100  to the display device  200 , in the process of step S 30  of the flowchart illustrated in  FIG. 5 . Hereinafter, the flow of the process will be described with reference to  FIG. 10 . 
     First, when a process of transmitting data in the portable information terminal  100  is started (step S 501 ), the user performs the drag-and-drop manipulation of the image  103  (see  FIG. 3B ) indicating data to be moved on the display screen  102 , and the manipulation detection unit  114  detects that a data movement instruction is issued (step S 502 ). The data movement instruction on the display screen is issued, for example, by the drag-and-drop manipulation based on the touch manipulation on the touch panel of the display screen  102 . 
     Next, the data input/output processing unit  112  of the portable information terminal  100  uploads data to be moved to the cloud server  300  (step S 503 ). 
     Next, the data input/output processing unit  312  of the cloud server  300  receives the data uploaded from the portable information terminal  100  (step S 504 ) and stores the received data in the data area  322 . 
     Next, the data input/output processing unit  312  of the cloud server  300  notifies the display device  200  of “data reception information” indicating that the data uploaded from the portable information terminal  100  is received and stored in the data area  322  (step S 505 ). 
     Next, when the display device  200  receives the “data reception information” from the cloud server  300  (step S 506 ), the data input/output processing unit  216  transmits “data request information” for requesting the transmission of data to the cloud server  300  (step S 507 ). 
     Next, when the cloud server  300  receives the “data request information” from the display device  200  (step S 508 ), the data input/output processing unit  312  transmits data stored in the data area  322  of the storage unit  321  to the display device  200  (step S 509 ). 
     Next, the display device  200  downloads data transmitted from the cloud server  300  with the data input/output processing unit  216  and stores the downloaded data in the storage unit  221  (step S 510 ). After the process of step S 510  is executed, a process of transmitting and receiving data between the portable information terminal  100  and the display device  200  ends (step S 511 ). 
     Through the procedure of the above-mentioned processes, the display device  200  can be caused to store the data stored in the portable information terminal  100  by a simple method using the drag-and-drop manipulation. 
     The embodiment of the present invention has been described above, but processing units constituting the portable information terminal  100 , the display device  200 , the display device  200 A, and the cloud server  300  mentioned above may be implemented by dedicated hardware or functions of the processing units may be implemented by recording a program for implementing the functions on a computer-readable recording medium and causing the computer system to read and execute the program recorded on the recording medium. 
     That is, the portable information terminal  100 , the display device  200 , the display device  200 A, and the cloud server  300  internally include a computer system. A process related to a series of the above-mentioned processes is stored in a computer-readable recording medium in the form of program and the above-mentioned processes are performed by the computer reading and executing the program. Here, the computer-readable recording medium is referred to as a magnetic disk, a magneto-optical disc, a compact disc read-only memory (CD-ROM), a digital versatile disc-read only memory (DVD-ROM), a semiconductor memory, or the like. Also, the computer program may be distributed to the computer by a communication line and the computer receiving the distributed computer program may execute the program. Also, the “computer system” mentioned here is assumed to include an operating system (OS) and hardware such as peripheral devices. 
     Also, here, correspondence relationships between the present invention and the above-mentioned embodiments will be additionally described. 
     That is, the portable information terminal in the present invention corresponds to the portable information terminal  100 , the display device in the present invention corresponds to one or both of the display device  200  and the display device  200 A (see  FIG. 2B ), and the display device  200  and the display device  200 A are collectively referred to as the display device  200 . Also, the first display panel in the present invention corresponds to the first display panel  201  of the display device  200  and the second display panel in the present invention corresponds to the second display panel  101  of the portable information terminal  100 . 
     Also, the first display processing unit in the present invention corresponds to the display processing unit  213  of the display device  200  and the second display processing unit in the present invention corresponds to the display processing unit  113  of the portable information terminal  100 . Also, the first input/output processing unit in the present invention corresponds to the data input/output processing unit  216  of the display device  200  and the second input/output processing unit in the present invention corresponds to the data input/output processing unit  112  of the portable information terminal  100 . Also, the first manipulation detection unit in the present invention corresponds to the manipulation detection unit  215  of the display device  200  and the second manipulation detection unit in the present invention corresponds to the manipulation detection unit  114  of the portable information terminal  100 . Also, the imaging unit in the present invention corresponds to the imaging unit  116  of the portable information terminal  100  and the information acquisition unit in the present invention corresponds to the image information acquisition unit  115  of the portable information terminal  100 . 
     (1) In the above-mentioned embodiment, the data transfer system  1  includes the display device  200  and the portable information terminal  100 . The display device  200  in the data transfer system  1  includes: the first display panel  201  having the display screen  202  (the first display screen) for displaying an image; the terminal detection unit  212  configured to detect that the portable information terminal  100  has approached the display screen  202  (the first display screen); and the display processing unit (the first display processing unit)  213  configured to cause the window  203  (the storage location image) which is an image indicating information about a storage location of data in the cloud server  300  (another device) to be displayed on the display screen  202  (the first display screen) when the approach of the portable information terminal  100  is detected by the terminal detection unit  212 . 
     In the data transfer system  1  with such a configuration, when it is detected that the portable information terminal  100  has approached the display screen  202  (the first display screen), the display device  200  displays the window  203  (the storage location image) indicating information about the data storage location in the cloud server  300  (the other device) on the display screen  202 . 
     Thus, in the data transfer system  1 , the display device  200  can detect the approach of the portable information terminal  100  and display information about the data storage location in the other device on the display screen  202  (the first display screen) in an image according to the detection. The information about the data storage location is displayed as the window  203  (the storage location image) in the display screen  202 . 
     Thereby, the data transfer system  1  can transfer data via another device between the portable information terminal  100  and the display device  200  without a cable connection, a wireless pairing manipulation, or the like between the portable information terminal  100  and the display device  200  being performed. For example, the cloud server  300  may be applied to the other device. 
     (2) Also, in the above-mentioned embodiment, the portable information terminal  100  includes the imaging unit  116 ; and the image information acquisition unit (information acquisition unit)  115  configured to acquire the information about the cloud server  300  which is the storage location on the basis of the storage location image captured by the imaging unit  116 . 
     According to the portable information terminal  100  with such a configuration, the image information acquisition unit (information acquisition unit)  115  acquires the information about the cloud server  300  which is the storage location on the basis of the storage location image captured by the imaging unit  116 . 
     Thereby, the data transfer system  1  can transfer data via the cloud server  300  (the other device) between the portable information terminal  100  and the display device  200  without a cable connection, a wireless pairing manipulation, or the like between the portable information terminal  100  and the display device  200  being performed. 
     (3) Also, in the above-mentioned embodiment, the display device  200  further includes a data input/output processing unit  216  (the first input/output processing unit) configured to acquire data stored in the cloud server  300  which is the storage location or store data in the storage location, wherein the portable information terminal  100  includes the data input/output processing unit  112  (the second input/output processing unit) configured to acquire data stored in the storage location or store the data in the storage location. 
     According to the display device  200  with such a configuration, the data input/output processing unit  216  acquires data stored in the cloud server  300  which is the storage location or stores the data in the storage location. Also, according to the portable information terminal  100  with such a configuration, the data input/output processing unit  112  acquires the data stored in the storage location or stores the data in the storage location. 
     Thereby, the data transfer system  1  can transfer data via the cloud server  300  (the other device) between the portable information terminal  100  and the display device  200  without a cable connection, a wireless pairing manipulation, or the like between the portable information terminal  100  and the display device  200  being performed. 
     (4) Also, in the above-mentioned embodiment, the display processing unit  213  (the first display processing unit) causes a first data image which is an image indicating first data to be sent to the portable information terminal  100  to be displayed on the display screen  202  (the first display screen), and the display processing unit  213  (the first display processing unit) further includes: the manipulation detection unit  215  (the first manipulation detection unit) configured to detect a first manipulation of moving the first data image to a predetermined first area; and the instruction information generation unit  214  (the instruction image display unit) configured to cause an instruction image which is an image indicating information about an instruction for acquiring the first data to be displayed on the display screen  202  (the first display screen) when the first manipulation detection unit  215  detects the first manipulation. The image information acquisition unit  115  (the information acquisition unit) further acquires the instruction information on the basis of the instruction image captured by the imaging unit  116 . 
     According to the display device  200  with such a configuration, the display processing unit  213  (the first display processing unit) causes the first data image which is the image indicating the first data to be sent to the portable information terminal  100  to be displayed on the display screen  202  (the first display screen). The manipulation detection unit  215  (the first manipulation detection unit) detects the first manipulation of moving the first data image to the predetermined first area. The instruction information generation unit  214  causes the instruction image which is the image indicating information about the instruction for acquiring the first data to be displayed on the display screen  202  (the first display screen) when the first manipulation detection unit  215  detects the first manipulation. 
     Thereby, the data transfer system  1  can transfer data via the cloud server  300  (the other device) between the portable information terminal  100  and the display device  200  without a cable connection, a wireless pairing manipulation, or the like between the portable information terminal  100  and the display device  200  being performed. 
     (5) Also, in the above-mentioned embodiment, the data input/output processing unit  216  (the first input/output processing unit) stores the first data in the storage location when the manipulation detection unit  215  (the first manipulation detection unit) detects the first manipulation, and the data input/output processing unit  112  (the second input/output processing unit) acquires the first data stored in the storage location when the image information acquisition unit  115  (the information acquisition unit) acquires the instruction information. 
     Thereby, the data transfer system  1  can transfer the above-mentioned first data via the cloud server  300  (the other device) between the portable information terminal  100  and the display device  200  without a cable connection, a wireless pairing manipulation, or the like between the portable information terminal  100  and the display device  200  being performed. 
     (6) Also, in the above-mentioned embodiment, the predetermined first area is an area of part of the display screen  202  (the first display screen) that the portable information terminal  100  has approached. 
     According to the display device  200  with such a configuration, the manipulation detection unit  215  (the first manipulation detection unit) detects the first manipulation of causing the first data image to be moved to the area of the part of the display screen  202  (the first display screen) which is the predetermined first area. 
     Thereby, the data transfer system  1  can transfer data via the cloud server  300  (the other device) between the portable information terminal  100  and the display device  200  by detecting the first manipulation of causing the image to be moved to the area of the part of the display screen  202  (the first display screen) without a cable connection, a wireless pairing manipulation, or the like between the portable information terminal  100  and the display device  200  being performed. 
     (7) Also, in the above-mentioned embodiment, the portable information terminal  100  further includes the second display panel  101  having a second display screen for displaying an image; the display processing unit  113  (the second display processing unit) configured to cause a second data image which is an image indicating second data to be sent to the display device  200  to be displayed on the second display screen; and the manipulation detection unit  114  (the second manipulation detection unit) configured to detect a second manipulation of moving the second data image to a predetermined second area. The data input/output processing unit  112  (the second input/output processing unit) stores the second data in the storage location when the second manipulation detection unit  114  detects the second manipulation. The data input/output processing unit  216  (the first input/output processing unit) acquires the second data stored in the storage location. 
     According to the portable information terminal  100  with such a configuration, the second display panel  101  has the second display screen for displaying an image. The display processing unit  113  (the second display processing unit) causes the second data image which is the image indicating second data to be sent to the second display panel  101  and the display device  200  to be displayed on the second display screen. The manipulation detection unit  114  (the second manipulation detection unit) detects the second manipulation of moving the second data image to the predetermined second area. The data input/output processing unit  112  (the second input/output processing unit) stores the second data in the storage location when the second manipulation detection unit  114  detects the second manipulation. The data input/output processing unit  216  (the first input/output processing unit) acquires the second data stored in the storage location. 
     Thereby, the data transfer system  1  can transfer data via the cloud server  300  (the other device) between the portable information terminal  100  and the display device  200  without a cable connection, a wireless pairing manipulation, or the like between the portable information terminal  100  and the display device  200  being performed. 
     (8) Also, in the above-mentioned embodiment, the display processing unit  113  (the second display processing unit) causes a display device image which is an image indicating the display device  200  to be displayed on the display screen  102  (the second display screen). The predetermined second area is an area of part of the second display screen in which the display device image is displayed. 
     According to the portable information terminal  100  with such a configuration, the display processing unit  113  (the second display processing unit) causes the display device image which is the image indicating the display device  200  to be displayed on the display screen  102  (the second display screen). The predetermined second area which is a destination to which the second data image is moved is an area of part of the display screen  102  (the second display screen) in which the display device image is displayed. 
     Thereby, the data transfer system  1  can transfer data via the cloud server  300  (the other device) between the portable information terminal  100  and the display device  200  on the basis of information displayed on the display screen  102  without a cable connection, a wireless pairing manipulation, or the like between the portable information terminal  100  and the display device  200  being performed. 
     (9) Also, in the above-mentioned embodiment, the storage location image is an image obtained by changing a luminance value according to the passage of time. 
     The display device  200  with such a configuration displays the storage location image with changing a luminance value of the storage location image according to the passage of time. 
     Thereby, the data transfer system  1  can transmit information to the portable information terminal  100  with changing the luminance value of the storage location image displayed on the display screen  202  and transfer data via the cloud server  300  (the other device) between the portable information terminal  100  and the display device  200  without a cable connection, a wireless pairing manipulation, or the like between the portable information terminal  100  and the display device  200  being performed. 
     Although embodiments of the present invention have been described above, the data transfer system of the present invention is not limited to the above-mentioned illustrated examples and, of course, various changes can be made without departing from the scope of the present invention. 
     For example, the present invention can also be preferably used in a projector. 
       FIG. 11  is an explanatory diagram illustrating an example in which the data transfer system of the present invention is applied to the projector. The projector  400  illustrated in  FIG. 11  causes light emitted from a light source lamp (not illustrated) to transmit through a liquid crystal panel (not illustrated) and projects a display image  403  on a screen  402  through a lens  401 . Also, the projector  400  includes an embedded display device  410  and an imaging unit  420  for image correction. 
     This projector  400  detects the approach of the portable information terminal  100  with the imaging unit  420 . When the approach of the portable information terminal  100  is detected, the projector  400  displays an image  405  indicating that the portable information terminal  100  is detected and a circular window  404  surrounding the image  405  in a predetermined area of the display image  403  by control of the embedded display device  410 . Also, when it is detected by the imaging unit  420  that the portable information terminal  100  is removed, the projector  400  deletes the image  405  and the circular window  404  displayed in the display image  403 . 
     For example, as in the case of the above-mentioned display device  200 , the projector  400  generates “storage instruction information” including URL information about a storage location of data stored in the cloud server  300  and transmits the “storage instruction information” to the portable information terminal  100  by causing blinking display of the window  203  to be performed. 
     Thereby, the projector  400  and the portable information terminal  100  can transfer data via the cloud server  300  without a cable connection, a wireless pairing manipulation, or the like being performed. 
     INDUSTRIAL APPLICABILITY 
     The present invention can be applied to a data transfer system, an information processing device, a portable information terminal, a data transfer method, and a program because it is possible to transfer data between a portable information terminal and an information processing device without a cable connection, a wireless pairing manipulation, or the like being performed. 
     REFERENCE SYMBOLS 
     
         
         
           
               1  Data transfer system 
               10  Communication network 
               100  Portable information terminal 
               101  Second display panel 
               102  Display screen (second display screen) 
               111  Communication processing unit 
               112  Data input/output processing unit (second input/output processing unit) 
               113  Display processing unit (second display processing unit) 
               114  Manipulation detection unit (second manipulation detection unit) 
               115  Image information acquisition unit (information acquisition unit) 
               116  Imaging unit 
               121  Storage unit 
               200 ,  200 A Display device 
               201  First display panel 
               202  Display screen (first display screen) 
               211  Communication processing unit 
               212  Terminal detection unit 
               213  Display processing unit (first display processing unit), 
               214  Instruction information generation unit 
               215  Manipulation detection unit (first manipulation detection unit) 
               216  Data input/output processing unit (first input/output processing unit) 
               221  Storage unit 
               300  Cloud server 
               311  Communication processing unit 
               312  Data input/output processing unit 
               321  Storage unit 
               322  Data area 
               400  Projector