Optical communication system

1. An optical communication system, comprising:

a transmitter including a display panel, which has a curved surface and is capable of emitting light, and a transmission controller, which causes the display panel to emit light representing an information signal; and

a receiver including an image sensor, which receives the light emitted from the display panel, and a reception controller, which extracts the information signal from the light received by the image sensor,

wherein the transmitter is provided on a first moving body and the receiver is provided on a second moving body,

the transmission controller causes the display panel to display a first two-dimensional code representing the information signal in a two-dimensional array, the two-dimensional array including pixels which emit light and pixels which do not emit light, and

the reception controller determines, based on a difference between a second shape of a second two-dimensional code captured by the image sensor and a first shape of the first two-dimensional code displayed on the display panel, whether a region of the display panel in which the first two-dimensional code is displayed faces the image sensor.

2. The optical communication system according to claim 1 ,

wherein the reception controller extracts the information signal only from the two-dimensional code displayed in the region of the display panel determined to face the image sensor.

3. The optical communication system according to claim 1 ,

wherein the display panel is an organic electroluminescent (EL) display panel.

4. The optical communication system according to claim 3 ,

wherein

the organic EL display panel is fixed to a member which constitutes an outer surface of the first moving body, and

an entire surface of the organic EL display panel and at least a part of the member are covered with a transparent resin.

5. The optical communication system according to claim 4 ,

wherein the member includes a through hole in a position corresponding to a rear surface of the organic EL display panel, and

the organic EL display panel is connected to the transmission controller with a cable which extends through the through hole.

6. The optical communication system according to claim 1 ,

wherein the transmission controller temporally changes intensity of the light emitted by the display panel according to the information signal.

7. The optical communication system according to claim 1 ,

wherein the display panel is a color display panel which is capable of emitting visible light of a color, and

the transmission controller temporally changes the color of the visible light emitted by the display panel according to the information signal.

8. The optical communication system according to claim 1 ,

wherein the transmission controller periodically inverts emission and non-emission of light from the pixels in the two-dimensional array, the pixels constituting the two-dimensional code.

9. The optical communication system according to claim 1 ,

wherein the transmitter is disposed in a first vehicle, and the receiver is disposed in a second vehicle.

10. The optical communication system according to claim 1 ,

wherein the transmitter is disposed in a first drone, and the receiver is disposed in a second drone.

11. The optical communication system according to claim 1 ,

wherein one of the transmitter and the receiver is disposed in a drone, and a remaining one of the transmitter and the receiver is disposed in an airship.

12. The optical communication system according to claim 1 ,

wherein the transmitter further includes a wireless communicator which transmits a signal using radio waves.

13. The optical communication system according to claim 1 , further comprising:

a camera including an image sensor for image capturing which captures an image and an image capturing controller which controls the image sensor for image capturing.

14. The optical communication system according to claim 13 , wherein the camera further includes a switch for starting and stopping an operation of the camera.

15. The optical communication system according to claim 1 ,

wherein the two-dimensional code includes a test pattern having a predetermined shape, and

the reception controller stores a third shape of the test pattern, and determines, based on a difference between a fourth shape of the test pattern captured by the image sensor and the third shape of the test pattern, which is store by the controller, whether the region of the display panel in which the two-dimensional code is displayed faces the image sensor.