Abstract:
The present invention pertains to a remote control system, the objective being to improve operability. A main body communication control unit  13  of a display device  7  permits connection to a remote controller  8  when not being in a connected state to a remote controller  9  when the connection is requested from the remote controller  8,  and on the other hand, disapproves the connection to the remote controller  8  and prompts the remote controller  8  to be connected to the remote controller  9  when being in the connected state to the remote controller  9  when the connection is requested from the remote controller  8.

Description:
TECHNICAL FIELD 
       [0001]    The present invention relates to a remote control system that remotely controls display contents of a display unit, for instance. 
       BACKGROUND ART 
       [0002]    As a conventional remote control system of this kind, a system of remotely controlling a display unit of a display device by a plurality of remote controllers has been proposed. That is, since multiple people can simultaneously operate display contents of one display unit, a game can be enjoyed by multiple people for instance (for instance, Patent Literature 1 below). 
       CITATION LIST 
     Patent Literature 
       [0003]    Patent Literature 1: Japanese Patent Laid-Open No. 2011-10222 
       SUMMARY OF INVENTION 
     Technical Problem 
       [0004]    In the above-described conventional example, since display contents of one display unit are remotely controlled by a plurality of remote controllers, it is effective when a game is played by multiple people or the like, for instance. 
         [0005]    However, in the system provided with a plurality of display units, since the display unit that is being viewed is set for each individual, when a person next to the individual operates the display unit, an unpleasant situation sometimes occurs. Accordingly, in such a system provided with the plurality of display units, for instance, exclusive remote controllers for the right and for the left are provided or one exclusive remote controller is switched for the right or for the left. 
         [0006]    That is, in the conventional example, there has been a need for operating each of the plurality of display units by the exclusive remote controller, causing a situation with poor operability. 
         [0007]    Therefore, an object of the present invention is to improve operability of a system. 
       Solution to Problem 
       [0008]    In order to achieve the object, the present invention includes a display device and first and second remote controllers that remotely control the display device, the display device includes a display control unit, a plurality of display units connected to the display control unit, a main body communication control unit connected to the display control unit, and a main body command reception unit and a main body command transmission unit connected to the main body communication control unit, the first remote controller includes a first command reception unit and a first command transmission unit that perform transmission and reception to/from the main body command reception unit and the main body command transmission unit of the display device, a first communication control unit connected to the first command reception unit and the first command transmission unit, and a first operation unit connected to the first communication control unit, the second remote controller comprises a second command reception unit and a second command transmission unit that perform transmission and reception to/from the main body command reception unit and the main body command transmission unit of the display device, a second communication control unit connected to the second command reception unit and the second command transmission unit, and a second operation unit connected to the second communication control unit, the main body communication control unit of the display device is configured to permit connection to the first remote controller when not being in a connected state to the second remote controller when the connection is requested from the first remote controller, and to disapprove the connection to the first remote controller and prompt the first remote controller to be connected to the second remote controller when being in the connected state to the second remote controller when the connection is requested from the first remote controller, and thus the intended object is achieved. 
       Advantageous Effect of Invention 
       [0009]    As described above, the present invention includes a display device and first and second remote controllers that remotely control the display device, the display device includes a display control unit, a plurality of display units connected to the display control unit, a main body communication control unit connected to the display control unit, and a main body command reception unit and a main body command transmission unit connected to the main body communication control unit, the first remote controller includes a first command reception unit and a first command transmission unit that perform transmission and reception to/from the main body command reception unit and the main body command transmission unit of the display device, a first communication control unit connected to the first command reception unit and the first command transmission unit, and a first operation unit connected to the first communication control unit, the second remote controller comprises a second command reception unit and a second command transmission unit that perform transmission and reception to/from the main body command reception unit and the main body command transmission unit of the display device, a second communication control unit connected to the second command reception unit and the second command transmission unit, and a second operation unit connected to the second communication control unit, the main body communication control unit of the display device is configured to permit connection to the first remote controller when not being in a connected state to the second remote controller when the connection is requested from the first remote controller, and to disapprove the connection to the first remote controller and prompt the first remote controller to be connected to the second remote controller when being in the connected state to the second remote controller when the connection is requested from the first remote controller, so that operability is improved. 
         [0010]    That is, since the main body communication control unit of the display device in the present invention is configured to permit the connection to the first remote controller when not being in the connected state to the second remote controller when the connection is requested from the first remote controller, and to disapprove the connection to the first remote controller and prompt the first remote controller to be connected to the second remote controller when being in the connected state to the second remote controller when the connection is requested from the first remote controller, cellular phones owned by individuals for instance can be used as the first and second remote controllers that remotely control the display device, and the operability is improved since there is no need of taking the trouble to prepare exclusive remote controllers. 
     
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         [0011]      FIG. 1  is a diagram illustrating an automobile loaded with a remote control system according to one embodiment of the present invention. 
           [0012]      FIG. 2  is a control block diagram of the same. 
           [0013]      FIG. 3  is an operation flowchart on a remote controller side. 
           [0014]      FIG. 4  is an operation flowchart on a display device side. 
       
    
    
     DESCRIPTION OF EMBODIMENTS 
       [0015]    Hereinafter, one embodiment of the present invention will be described using attached drawings. 
         [0016]    In  FIG. 1 , reference numeral  1  denotes an automobile, a driver&#39;s seat  3  and a front passenger&#39;s seat  4  are disposed at the front of car interior  2 , and a handle  5  is disposed at the front of the driver&#39;s seat  3 . Also, at the back of the car interior  2 , a rear seat  6  is disposed. 
         [0017]    Further, a display device  7  is disposed between the driver&#39;s seat  3  and the front passenger&#39;s seat  4 , and remote controllers  8  and  9  that remotely control the display device  7  are disposed on the left and right of the rear seat  6 . 
         [0018]    Here, the remote controllers  8  and  9  are individually owned as cellular phones by passengers seated on the left and right of the rear seat  6  for instance, and have a remote control function as well. 
         [0019]      FIG. 2  is a control block diagram of the above-described remote control system. 
         [0020]    The display device  7  includes, as illustrated in  FIG. 2 , a display control unit  10 , a plurality of display units  11  and  12  connected to the display control unit  10 , a main body communication control unit  13  connected to the display control unit  10 , and a main body command reception unit  14 , a main body command transmission unit  15  and a transmission sequence storage unit  13   a  connected to the main body communication control unit  13 . 
         [0021]    The remote controller  8  includes a command reception unit  16  and a command transmission unit  17  that perform transmission and reception to/from the main body command reception unit  14  and the main body command transmission unit  15 , a communication control unit  18  connected to the command reception unit  16  and the command transmission unit  17 , and an operation unit  19  and a transmission sequence storage unit  20  connected to the communication control unit  18 . 
         [0022]    Further, the remote controller  9  includes a command reception unit  21  and a command transmission unit  22  that perform transmission and reception to/from the main body command reception unit  14  and the main body command transmission unit  15 , a communication control unit  23  connected to the command reception unit  21  and the command transmission unit  22 , and an operation unit  24  and a transmission sequence storage unit  25  connected to the communication control unit  23 . 
         [0023]    The remote controllers  8  and  9  are the cellular phones owned by the passengers seated on the left and right of the rear seat  6  as described above, and since functions of the cellular phones are well-known, descriptions are omitted in order to avoid complication of the descriptions. 
         [0024]    In the above-described configuration, the display unit  11  is provided on a back surface side of the front passenger&#39;s seat  4 , and the display unit  12  is provided on a back surface of the driver&#39;s seat  3 . 
         [0025]    The transmission sequence storage units  13   a,    20  and  25  are for storing a transmission sequence beforehand. 
         [0026]      FIG. 3  is an operation flowchart on a remote controller side in the above-described remote control system. 
         [0027]    In the following operation descriptions, a present state is assumed to be a situation where, in  FIG. 1 , the remote controller  8  is connected to the main body communication control unit  13  of the display device  7  in one-to-one correspondence by Bluetooth, and remote control is performed while the display unit  11  is being viewed. 
         [0028]    Prior to this, the remote controller  8  and the display device  7  are connected first. That is, on the side of the remote controller  8 , the remote control function thereof is activated. 
         [0029]    The activation of the remote control function is not remote control by the operation unit  19 . That is, since it is not an “operation request” (S 1 : No), an operation is shifted to step S 2  to receive (Bluetooth) a connection request from the main body command transmission unit  15  of the display device  7  (S 2 : Yes). 
         [0030]    This state is, for the remote controller  8 , the state without a connection request from the remote controller  9  which is a downstream side connection device relative to the remote controller  8  (S 3 : No). Therefore, the operation is shifted to step S 4  to transmit (Bluetooth) connection permission to the command reception unit  16  of the display device  7 , and thus connection processing is completed (S 5 ). 
         [0031]    In the state that the connection processing is completed in such a manner, when the remote control is performed in the operation unit  19  of the remote controller  8 , “connection requested” is determined in step S 1  (S 1 : Yes), the operation is shifted to step S 6 , and since it is already “connection processing completed” (S 6 : Yes), the operation is shifted to step S 7 . In step S 7 , processing of transmitting an operation command to an upstream side connection device is performed. Specifically, the communication control unit  18  transmits (Bluetoothes) the operation command from the command transmission unit  17  to the main body command reception unit  14  of the display device  7 , according to a transmission sequence stored in the transmission sequence storage unit  20 . 
         [0032]      FIG. 4  is an operation flowchart on a display device side in the above-described remote control system. 
         [0033]    On the side of the display device  7 , when the connection is requested from the remote controller  8 , since it is not the operation command (S 21 : No), the main body communication control unit  13  shifts to step S 22  and determines reception of the connection request (S 22 : Yes). Since this state is the state without the connection to the remote controller  9  (S 23 : No), the main body communication control unit  13  shifts to step S 24  to transmit (Bluetooth) the connection permission to the remote controller  8 , and executes the connection processing (S 25 ). 
         [0034]    In this state, when the remote controller  8  performs the remote control, “operation command reception” is determined in step S 21  (S 21 : Yes), and the operation is shifted to step S 26 . In step S 21 , the main body communication control unit  13  processes the operation command and remotely controls the display contents of the display unit  11  through the display control unit  10 . 
         [0035]    Then, in the state of remotely controlling the display unit  11  by the remote controller  8  in such a manner, when another person who owns the remote controller  9  is to remotely control the display unit  12  present in front of the person himself/herself, the main body communication control unit  13  of the display device  7  shifts to step S 23  by determining “No” in determination of “operation command received?” (S 21 ) and determining “Yes” in determination of “connection requested?” (S 22 ) further. Then, the main body communication control unit  13  determines “presence” of the downstream side connection device in step S 23  (S 23 : Yes), and shifts to step S 27 . 
         [0036]    In step S 27 , the main body communication control unit  13  disapproves the connected state to the remote controller  9 , and replies to the remote controller  9  that the remote controller  8  is already connected. 
         [0037]    Referring to  FIG. 3  again here, in such a situation, the remote controller  9  is determined as not being in the connected state yet in determination in step S 6  (S 6 : No), and shifts to step S 8  to transmit (Bluetooth) the connection request to the main body communication control unit  13  of the display device  7 . 
         [0038]    After processing of step S 8 , the operation is shifted to step S 9 , and in the step, since the remote controller  8  is already connected as described above, connection disapproval is received (Bluetoothed). 
         [0039]    Then, the communication control unit  23  of the remote controller  9  requests the connection to the remote controller  8  already connected to the main body communication control unit  13  of the display device  7 , according to the sequence stored in the transmission sequence storage unit  25  (S 10 ). 
         [0040]    When the connection is permitted from the remote controller  8 , the connection processing is executed by step S 11  through step S 9 , and then the operation command to the remote controller  8  is transmitted (Bluetoothed) (S 7 ). 
         [0041]    That is, though the main body communication control unit  13  of the display device  7  cannot be remotely controlled directly by the remote controller  9 , the main body communication control unit  13  of the display device  7  is remotely controlled through the remote controller  8 , and the display unit  12  can be remotely controlled as a result. 
         [0042]    In the meantime, when a cellular phone of another person is to be utilized as a remote controller further, since the remote controller  9  is already connected to the remote controller  8 , “Yes” is determined in step S 3 , resulting in advancing to step S 12 . 
         [0043]    That is, at the time, the cellular phone of another person advances through steps S 1 , S 6 , S 8 , S 9 , S 11  and S 7  in the flow illustrated in  FIG. 3 , and is connected to the remote controller  9 . Then, the remote controller  9  can remotely control the main body communication control unit  13  of the display device  7  through the remote controller  8 . 
         [0044]    While the case with two remote controllers has been described in the embodiment described thus far, the present invention is not limited to this aspect. Three or more remote controllers may remotely control the display device. 
         [0045]    For instance, when three remote controllers are to utilize the remote control system according to the present invention, the third remote controller includes, similarly to the first and second remote controllers described above, a third command reception unit and a third command transmission unit that perform transmission and reception to/from the main body command reception unit and the main body command transmission unit of the display device, a third communication control unit connected to the third command reception unit and the third command transmission unit, and a third operation unit connected to the third communication control unit. 
       INDUSTRIAL APPLICABILITY 
       [0046]    As described above, the main body communication control unit of the display device in the present invention is configured to permit the connection to a first remote controller when not being in the connected state to a second remote controller when the connection is requested from the first remote controller, and to disapprove the connection to the first remote controller and prompt the first remote controller to be connected to the second remote controller when being in the connected state to the second remote controller when the connection is requested from the first remote controller. 
         [0047]    By attaining such a configuration, cellular phones owned by individuals for instance can be used as the first and second remote controllers that remotely control the display device, and the operability is improved since there is no need of taking the trouble to prepare exclusive remote controllers. 
         [0048]    Therefore, utilization as various kinds of remote control systems can be expected. 
       REFERENCE SIGNS LIST 
       [0000]    
       
           1  Automobile 
           2  Car interior 
           3  Driver&#39;s seat 
           4  Front passenger&#39;s seat 
           5  Handle 
           6  Rear seat 
           7  Display device 
           8  Remote controller 
           9  Remote controller 
           10  Display control unit 
           11  Display unit 
           12  Display unit 
           13  Main body communication control unit 
           13   a  Transmission sequence storage unit 
           14  Main body command reception unit 
           15  Main body command transmission unit 
           16  Command reception unit 
           17  Command transmission unit 
           18  Communication control unit 
           19  Operation unit 
           20  Transmission sequence storage unit 
           21  Command reception unit 
           22  Command transmission unit 
           23  Communication control unit 
           24  Operation unit 
           25  Transmission sequence storage unit