Video display device and video display method

1. A video display device, comprising:

a video display unit that displays video in accordance with a video signal;

a display control unit that stops video display by the video display unit when a predetermined operation is instructed;

a switching process signal output unit that outputs a predetermined switching process signal when the predetermined operation is instructed, the switching process signal output unit stopping the output of the switching process signal when the predetermined operation is complete;

a switching detection signal input and output unit that outputs a switching detection signal, the switching detection signal taking a first state in a case where the switching process signal is being output by the switching process signal output unit of the display device, the switching detection signal taking the first state in a case where the switching process signal is being output by a switching process signal output unit of an other display device, the switching detection signal taking a second state in a case where the switching process signal is not being output by either the switching process signal output unit of the display device or the switching process signal output unit of the other display device; and

a switching detection signal input unit that releases the stoppage of the video display by the video display unit when the switching detection signal is in the second state,

wherein the first state includes that at least one of the video display unit of the video display device and a video display unit of the other video display device is switching a display video image; and

wherein the second state indicates that the video display unit of the video display device has completed switching of a display video image and a video display unit of the other video display device has completed switching of the display video image.

2. The video display device according to claim 1 , wherein the predetermined operation is instructed by a radio signal, and

wherein the video display device further comprises a reception unit that receives the radio signal instructing the predetermined operation.

3. The video display device according to claim 1 , wherein the predetermined operation comprises a switching operation of the video signal.

4. The video display device according to claim 1 , wherein the predetermined operation comprises an activation operation of an own device.

5. A video display method performed by a video display device including a video display unit, the video display method comprising:

displaying, by the video display unit, video in accordance with a video signal;

stopping video display by the video display unit when a predetermined operation is instructed;

outputting a predetermined switching process signal when the predetermined operation is instructed;

stopping the output of the switching process signal when the predetermined operation is complete;

outputting a switching detection signal, the switching detection signal taking a first state in a case where the switching process signal is being output by the display device, the switching detection signal taking the first state in a case where the switching process signal is being output by an other display device, the switching detection signal taking a second state in a case where the switching process signal is not being output by either the display device or the other display device; and

releasing a stoppage of the video display by the video display unit when the switching detection signal is in the second state,

wherein the first state indicates that at least one of the video display unit of the video display device and a video display unit of the other video display device is switching a display video image; and

wherein the second state indicates that the video display unit of the video display device has completed switching of a display video image and a video display unit of the other video display device has completed switching of the display video image.

6. The video display device according to claim 1 , wherein the switching process signal outputted by the switching process signal output unit of the video display device indicates whether the video display unit of the video display device is switching a display video image.

7. The video display device according to claim 1 , wherein the switching detection signal input and output unit comprises a transistor and a resistor, and

wherein the predetermined switching process signal, outputted from the switching process signal output unit, is input to a base of the transistor.

8. The video display device according to claim 7 , wherein a collector of the transistor is connected to a switching detection signal input and output terminal that is coupled to an output of a transistor of the other display device that is coupled to the switching process signal output unit of the other display device.

9. The video display device according to claim 8 , wherein the collector of the transistor and the switching detection signal input and output terminal are connected to one end of the resistor.

10. The video display device according to claim 9 , wherein an other end of the resistor is connected to a power source, and an emitter of the transistor is connected to ground.

11. The video display method according to claim 5 , wherein the switching process signal outputted by the video display device indicates whether the video display device is switching a display video image.

12. The video display method according to claim 5 , wherein the video display unit further includes a switching detection signal input and output unit that outputs the switching detection signal, and

wherein the switching detection signal input and output unit comprises a transistor and a resistor.

13. The video display method according to claim 12 , wherein the video display unit further includes a switching process signal output unit, and

wherein the predetermined switching process signal, outputted from the switching process signal output unit, is input to a base of the transistor.

14. The video display method according to claim 13 , wherein a collector of the transistor is connected to a switching detection signal input and output terminal that is coupled to an output of a transistor of the other display device that is coupled to a switching process signal output unit of the other display device.

15. The video display method according to claim 14 , wherein the collector of the transistor and the switching detection signal input and output terminal are connected to one end of the resistor.

16. The video display method according to claim 15 , wherein an other end of the resistor is connected to a power source, and an emitter of the transistor is connected to ground.