Display apparatus and display method

1. A display apparatus capable of performing wireless connection with a first terminal device and with a second terminal device, the display apparatus comprising:

a display configured to display an image;

a communication unit configured to communicate with the first terminal device and with the second terminal device by wireless communication; and

a management controller configured to manages the wireless communication with the first terminal device and with the second terminal device,

wherein the management controller generates a terminal connection image including permission information for connecting the second terminal device to the display apparatus, based on terminal connection permission information for connection of the second terminal device whose wireless connection with the display apparatus is permitted, after receiving the terminal connection permission information being transmitted from the first terminal device that is previously wireless-connected to the display apparatus,

wherein the display displays the terminal connection image generated by the management controller,

wherein the communication unit receives second information for connecting the second terminal device with the display apparatus, which is generated by capturing the terminal connection image by the second terminal device and transmitted from the second terminal device, and

wherein the management controller allows the second terminal device to connect the display apparatus based on the second information received from the second terminal device.

2. The display apparatus according to claim 1 ,

wherein, when the communication unit and the first terminal device start communicating with each other, the management controller performs a process different from a process including generation and display of the terminal connection image.

3. The display apparatus according to claim 1 further comprising

a time configured to output information of current date and time,

wherein, when generating the terminal connection image, the management controller acquires the information of current date and time from the time, and adds the acquired information of current date and time to the terminal connection image.

4. The display apparatus according to claim 1 ,

wherein the management controller permits wireless connection of the first terminal device if previously-registered identification information that identifies the first terminal device whose wireless connection is permitted matches externally-input identification information added to the first terminal device.

5. The display apparatus according to claim 1 ,

wherein the terminal connection image generated by the management controller is a QR code.

6. The display apparatus according to claim 5 further comprising

an information storage configured to store operation permission information indicating a permitted status of the second terminal device,

wherein the management controller compares the operation permission information stored in the information storage unit and the status of the second terminal device transmitted from the second terminal device, and generates an image indicating that the second terminal device is performing such an operation as not matching the operation permission information if the status includes a status not matching the operation permission information, and

the display displays the image indicating that the second terminal device is performing such an operation as not matching the operation permission information.

7. The display apparatus according to claim 6 ,

wherein the operation permission information stored in the information storage is transmitted from the first terminal device.

8. The display apparatus according to claim 1 ,

wherein, when the display apparatus receives terminal setting information from the first terminal device, the terminal setting information indicating the number of the second terminal devices that transmit images to be displayed on the display, the management controller sets a display position of each of the images in accordance with the number of the second terminal devices, and generates the terminal connection image to which information of the display position of each of the images is added, and

the display apparatus displays the terminal connection image generated by the management controller, based on the information of the display position.

9. A display method of an image, performed by a display apparatus including a display that displays the image, a communication unit that communicates by wireless communication with a first terminal device and with a second terminal device, and a management controller that manages the wireless communication with the first terminal device and with the second terminal device, the display apparatus being capable of performing wireless connection with the first terminal device and with the second terminal device, the display method comprising steps of:

causing the communication unit to receive terminal connection permission information from the first terminal device that is previously wireless-connected to the display apparatus, the terminal connection permission information for connecting the second terminal device whose wireless connection with the display apparatus is permitted;

causing the management controller to generate a terminal connection image including permission information for connecting the second terminal device with the display apparatus, based on the terminal connection permission information;

causing the display to display the terminal connection image generated by the management controller;

causing the communication unit to receive second information for connecting the second terminal device with the display apparatus, which is generated by capturing the terminal connection image by the second terminal device and transmitted from the second terminal device; and

causing the management controller to allow the second terminal device to connect the display apparatus based on the second information received from the second terminal device.

10. The display method according to claim 9 further comprising a step of

causing the management controller to perform a process different from a process including generation and display of the terminal connection image when the communication unit and the first terminal device start communicating with each other.

11. The display method according to claim 9 further comprising a step of

causing the management controller to acquire information of current date and time and add the acquired information of current date and time to the terminal connection image when the terminal connection image is generated.

12. The display method according to claim 9 further comprising a step of

causing the management controller to permit wireless connection of the first terminal device if previously-registered identification information that identifies the first terminal device whose wireless connection is permitted matches externally-input identification information added to the first terminal device.

13. The display method according to claim 9 further comprising steps of:

causing the communication unit to receive a current status of the second terminal device transmitted from the second terminal device;

causing the management controller to compare previously-registered operation permission information indicating a status permitted for the second terminal device and the status received by the management controller itself from the second terminal device, and generating an image indicating that the second terminal device is performing such an operation as not matching the operation permission information if the status includes a status not matching the operation permission information; and

causing the display to display the image indicating that the second terminal device is performing such an operation as not matching the operation permission information.

14. The display method according to claim 9 further comprising steps of:

causing the management controller to set a display position of each image in accordance with the number of the second terminal devices when the display apparatus receives terminal setting information from the first terminal device, the terminal setting information indicating the number of the second terminal devices that transmit the images to be displayed on the display, and to generate the terminal connection image to which information of the display position of each of the images is added; and

causing the display apparatus to display the terminal connection image generated by the management controller, based on the information of the display position.