Mobile terminal device and input operation receiving method for switching input methods

1. A mobile terminal device comprising:

a first input apparatus configured to receive input operations via a first input method;

a second input apparatus configured to receive input operations via a second input method that is different than the first input method; and

at least one processor configured to

receive a refusal operation, and

while input operations are being received by the first input apparatus via the first input method, determine when reception of input operations via the first input method has become difficult by determining that the refusal operation has not been received, and,

when receiving input operations via the first input method is determined to have become difficult, start operation of the second input apparatus to begin receiving input operations via the second input method, and stop operation of the first input apparatus to stop receiving input operations via the first input method.

2. The mobile terminal device according to claim 1 , wherein the first input method comprises sound recognition, wherein the first input apparatus comprises a microphone and converts sound, received via the microphone, into text, and wherein determining when reception of input operations via the first input method has become difficult comprises determining when a volume of ambient sound, received via the microphone, exceeds a predetermined level.

3. The mobile terminal device according to claim 1 , wherein the first input method comprises gesture detection, wherein the first input apparatus comprises a camera and detects a gesture based on an image photographed by the camera, and wherein determining when reception of input operations via the first input method has become difficult comprises determining when an ambient brightness is lower than or equal to a predetermined brightness.

4. The mobile terminal device according to claim 1 , further comprising a display, wherein the first input method comprises line-of-sight detection, wherein the first input apparatus comprises a camera and detects a position on the display corresponding to a line of sight of a user based on eyes of the user photographed by the camera, and wherein determining when reception of input operations via the first input method has become difficult comprises determining if the mobile terminal device is moving.

5. The mobile terminal device according to claim 1 , wherein determining when reception of input operations via the first input method has become difficult comprises determining when a number of false input operations exceeds a predetermined number.

6. A mobile terminal device comprising:

a first input apparatus configured to receive input operations via a first input method;

a second input apparatus configured to receive input operations via a second input method that is different than the first input method;

a third input apparatus configured to receive input operations via a third input method that is different than both the first input method and the second input method, and

at least one processor configured to

while input operations are being received by the first input apparatus via the first input method, determine when reception of input operations via the first input method has become difficult, and,

when receiving input operations via the first input method is determined to have become difficult:

receive a user operation that indicates an input method to be used;

when the user operation indicates the second input method, start operation of the second input apparatus to begin receiving input operations via the second input method;

when the user operation indicates the third input method, start operation of the third input apparatus to begin receiving input operations via the third input method; and

stop operation of the first input apparatus to stop receiving operations via the first input method.

7. The mobile terminal device according to claim 6 , wherein the first input method comprises sound recognition, wherein the first input apparatus comprises a microphone and converts sound, received via the microphone, into text, and wherein determining when reception of input operations via the first input method has become difficult comprises determining when a volume of ambient sound, received via the microphone, exceeds a predetermined level.

8. The mobile terminal device according to claim 6 , wherein the first input method comprises gesture detection, wherein the first input apparatus comprises a camera and detects a gesture based on an image photographed by the camera, and wherein determining when reception of input operations via the first input method has become difficult comprises determining when an ambient brightness is lower than or equal to a predetermined brightness.

9. The mobile terminal device according to claim 6 , further comprising a display, wherein the first input method comprises line-of-sight detection, wherein the first input apparatus comprises a camera and detects a position on the display corresponding to a line of sight of a user based on eyes of the user photographed by the camera, and wherein determining when reception of input operations via the first input method has become difficult comprises determining if the mobile terminal device is moving.

10. The mobile terminal device according to claim 6 , wherein determining when reception of input operations via the first input method has become difficult comprises determining when a number of false input operations exceeds a predetermined number.

11. An input operation receiving method comprising:

while input operations are being received by a first input apparatus, configured to receive input operations via a first input method and receive a refusal operation, determining when reception of input operations via the first input method has become difficult by determining that the refusal operation has not been received; and

when receiving input operations via the first input method is determined to have become difficult,

starting operation of a second input apparatus, configured to receive input operations via a second input method that is different than the first input method, to begin receiving input operations via the second input method, and

stopping operation of the first input apparatus to stop receiving input operations via the first input method.

12. The method according to claim 11 , wherein determining when reception of input operations via the first input method has become difficult comprises determining when a volume of ambient sound, received via a microphone, exceeds a predetermined level.

13. The method according to claim 11 , wherein determining when reception of input operations via the first input method has become difficult comprises determining when an ambient brightness is lower than or equal to a predetermined brightness.

14. The method according to claim 11 , wherein determining when reception of input operations via the first input method has become difficult comprises determining if the first input apparatus is moving.

15. The method according to claim 11 , wherein determining when reception of input operations via the first input method has become difficult comprises determining when a number of false input operations exceeds a predetermined number.