Mobile apparatus including input sections capable of displaying one or more images

1. A mobile apparatus comprising:

a plurality of input sections each configured to display at least one image that corresponds to an input value assigned thereto;

a plurality of label areas provided correspondingly to the plurality of input sections, each of the label areas labeled with at least one character associated with the input value that is assigned to a corresponding one of the plurality of input sections;

a photosensor configured to measure ambient illuminance; and

a display controller configured to control turn-off and turn-on of image-display at the plurality of input sections based on the ambient illuminance, wherein:

the display controller is configured to turn off the image-display when the ambient illuminance is a threshold value or more, and to turn on the image-display when the ambient illuminance is less than the threshold value;

the display controller is configured to turn off the image-display when a character type of the image-display is the same as a character type labeled in the label areas, and when the ambient illuminance is the threshold value or more;

the display controller is configured to turn on the image-display when the character type of the image-display is the same as the character type labeled in the label areas, and when the ambient illuminance is less than the threshold value; and

the display controller is configured to turn on the image-display when the character type of the image-display is different from the character type labeled in the label areas.

2. The mobile apparatus of claim 1 , wherein the display controller is configured to turn on the image-display when the ambient illuminance is less than the threshold value and when at least one of the input sections are operated.

3. The mobile apparatus of claim 2 , wherein the display controller is configured to turn off the image-display when the input sections are not operated before a threshold time elapses.

4. The mobile apparatus of claim 3 , wherein the display controller is configured to turn on the image-display when the character type of the image-display is different from the character type labeled in the label areas and when at least one of the input sections is operated.

5. The mobile apparatus of claim 4 , wherein the display controller is configured to turn on the image-display more brightly as the ambient illuminance becomes smaller, when the ambient illuminance is less than the threshold value.

6. The mobile apparatus of claim 2 , wherein the display controller is configured to turn on the image-display more brightly as the ambient illuminance becomes smaller, when the ambient illuminance is less than the threshold value.

7. The mobile apparatus of claim 3 , wherein the display controller is configured to turn on the image-display more brightly as the ambient illuminance becomes smaller, when the ambient illuminance is less than the threshold value.

8. The mobile apparatus of claim 1 , wherein, the display controller is configured to turn on the image-display when a direction of the image-display is different from a direction of the at least one characters labeled in the label area.

9. The mobile apparatus of claim 8 , wherein the display controller is configured to turn on the image-display more brightly as the ambient illuminance becomes smaller, when the ambient illuminance is less than the threshold value.

10. The mobile apparatus of claim 1 , wherein the display controller is configured to turn on the image-display more brightly as the ambient illuminance becomes smaller, when the ambient illuminance is less than the threshold value.