Electronic device and control method therefor

1. An electronic device that receives a radio signal according to specific conditions and displays specific information, comprising:

a reception unit that receives the radio signal;

an electrophoretic display unit that displays the specific information;

a display drive unit that supplies a drive signal corresponding to content of the specific information to be displayed to the electrophoretic display unit; and

a control unit that instructs the reception unit to receive the radio signal and instructs the display drive unit to supply the drive signal to the electrophoretic display unit,

instructs the display drive unit to supply a drive signal for displaying an indication that the reception unit is receiving the radio signal to the electrophoretic display unit before instructing the reception unit to receive the radio signal, and

controls the display drive unit to stop supplying the drive signal while the reception unit is receiving the radio signal.

2. The electronic device described in claim 1 , wherein:

the electronic device further comprises a power supply unit that supplies electric power to the display drive unit; and

the control unit stops the display drive unit from supplying the drive signal while the reception unit is receiving the radio signal by instructing the power supply unit to stop supplying power to the display drive unit.

3. The electronic device described in claim 1 , wherein:

the electrophoretic display unit can display at least a first color and a second color; and

the first color or the second color is displayed over the entire display to indicate that signal reception is in progress.

4. The electronic device described in claim 1 , wherein:

the electrophoretic display unit can display at least a first color, a second color, and an intermediate color of the first color and second color; and

the intermediate color is displayed over the entire display to indicate that signal reception is in progress.

5. The electronic device described in claim 1 , wherein:

the electronic device further comprises a timekeeping unit for keeping the current time;

the reception unit receives a radio signal containing time information;

the electrophoretic display unit displays the current time as the specific information; and

the control unit adjusts the current time kept by the timekeeping unit based on the received time information, and controls the display drive unit to resume supplying the drive signal related to displaying the current time after the reception unit completes reception of the radio signal, when acquisition of the time information by the reception unit is determined successful.

6. The electronic device described in claim 1 , wherein:

the electrophoretic display unit is an electrophoretic display panel that has an electrophoretic display layer containing electrophoretic elements disposed between a common electrode layer where a common electrode is formed, and a drive electrode layer where a drive electrode for driving the electrophoretic display layer is formed;

the display drive unit supplies common electrode drive pulses repeating a first potential and a second potential to the common electrode; and

the control unit controls the display drive unit to stop supplying the common electrode drive pulses while the reception unit is receiving the radio signals.

7. A control method for an electronic device that uses a reception unit to receive radio signals and displays specific information on an electrophoretic display unit using a drive signal supplied from a display drive unit, comprising:

instructing the reception unit to receive the radio signal, and instructing the display drive unit to supply the drive signal to the electrophoretic display unit; and

instructing the display drive unit to supply a drive signal for displaying an indication that the reception unit is receiving the radio signal to the electrophoretic display unit before instructing the reception unit to receive the radio signal, and controlling the display drive unit to stop supplying the drive signal while the reception unit is receiving the radio signal, when the reception unit is instructed to receive the radio signal.