Electronic apparatus and control method

1. An electronic apparatus comprising:

a detection sensor which detects a wave motion coming from an object present within a predetermined range and outputs a detection signal;

an object detection unit which detects an object present within the predetermined range based on the detection signal output from the detection sensor;

a gesture detection unit which detects a gesture according to movement of the object based on the detection signal output from the detection sensor; and

a detection mode control unit that switches between an approach detection mode, a leave detection mode, and a gesture detection mode based on a detection result of the object detection unit, wherein

the detection mode control unit sets a detection resolution of the detection sensor to a first resolution during the approach detection mode and the leave detection mode, and sets the detection resolution of the detection sensor to a second resolution equal in field of view to the first resolution and higher in resolution than the first resolution during the gesture detection mode, and

the detection mode control unit switches to the gesture detection mode upon the object detection unit simultaneously detecting, during the approach detection mode or the leave detection mode, both a first object within the predetermined range and a second object at a distance closer than the first object.

2. The electronic apparatus according to claim 1 , wherein when the second object is further detected at a distance closer than the first object in a state where the first object is being detected within the predetermined range by the object detection unit, the detection mode control unit changes the detection resolution from the first resolution to the second resolution.

3. The electronic apparatus according to claim 1 , wherein the detection mode control unit changes the detection resolution from the first resolution to the second resolution when a first object is detected from a state where the first object is not detected within the predetermined range by the object detection unit, and after the change, continues setting of the second resolution when a second object is detected at a distance closer than the first object within a predetermined period, or returns from the second resolution to the first resolution when the second object is not detected at the distance closer than the first object within the predetermined period.

4. The electronic apparatus according to claim 1 , wherein the detection mode control unit returns the detection resolution from the second resolution to the first resolution based on a fact that the second object is no longer detected from a state where the second object is being detected at the distance closer than the first object by the object detection unit.

5. The electronic apparatus according to claim 1 , wherein

the gesture detection unit detects a gesture according to movement of the second object, and

the detection mode control unit returns the detection resolution from the second resolution to the first resolution based on a fact that the gesture according to the movement of the second object is detected by the gesture detection unit.

6. The electronic apparatus according to claim 1 , wherein the detection mode control unit changes the detection resolution from the first resolution to the second resolution when the second object is detected at a distance closer by a fixed distance or more than the first object.

7. An electronic apparatus, comprising:

a detection sensor which detects a wave motion coming from an object present within a predetermined range and outputs a detection signal;

an object detection unit which detects an object present within the predetermined range based on the detection signal output from the detection sensor;

a gesture detection unit which detects a gesture according to movement of the object based on the detection signal output from the detection sensor;

a detection resolution control unit which sets a detection resolution of the detection sensor to a first resolution when detecting the object present within the predetermined range, and sets the detection resolution of the detection sensor to a second resolution higher in resolution than the first resolution when detecting the gesture;

a first chassis with the detection sensor provided therein;

a second chassis connected to the first chassis in a manner to be rotatable relative to the first chassis, and on which an operation unit for accepting user's operations is provided; and

an angle detection unit which detects an open angle between the first chassis and the second chassis,

wherein when the open angle detected by the angle detection unit is less than a predetermined value, the object detection unit excludes a partial range in the predetermined range from a detection target.

8. A control method for an electronic apparatus including a detection sensor which detects a wave motion coming from an object present within a predetermined range and outputs a detection signal, the control method comprising:

a step of causing an object detection unit to detect an object present within the predetermined range based on the detection signal output from the detection sensor;

a step of causing a gesture detection unit to detect a gesture according to movement of the object based on the detection signal output from the detection sensor; and

a step of causing a detection mode control unit to switch between an approach detection mode, a leave detection mode, and a gesture detection mode based on a detection result of the object detection unit;

a step of causing the detection mode control unit to set a detection resolution of the detection sensor to a first resolution during the approach detection mode and the leave detection mode, and set the detection resolution of the detection sensor to a second resolution equal in field of view to the first resolution and higher in resolution than the first resolution during the gesture detection mode; and

a step of causing the detection mode control unit to switch to the gesture detection mode upon the objection detection unit simultaneously detecting, during the approach detection mode or the leave detection mode, both a first object within the predetermined range and a second object at a distance closer than the first object.

9. A computing device comprising:

a detection sensor that detects a wave motion coming from an object present within a predetermined range and outputs a detection signal; and

at least one processor that is coupled to the detection sensor and that:

switches between an approach detection mode, a leave detection mode, and a gesture detection mode based on the detection signal output from the detection sensor;

sets a detection resolution of the detection sensor to a first resolution during the approach detection mode and the leave detection mode, and sets the detection resolution of the detection sensor to a second resolution equal in field of view to the first resolution and higher in resolution than the first resolution when detecting the gesture; and

upon detecting, during the approach detection mode or the leave detection mode, a first object within the predetermined range and a second object at a distance closer than the first object, switches to the gesture detection mode, wherein

during the approach detection mode, the at least one processor detects an object entering the predetermined range,

during the leave detection mode, the at least one processor detects an object leaving the predetermined range, and

during the gesture detection mode, the at least one processor detects a gesture according to movement of an object within the predetermined range.