Control method, control device and electronic device

A control device for an electronic device, wherein the electronic device comprises a transparent display screen comprising a display area and an infrared sensor which is disposed below the display area;

• wherein the control device comprises:
• an acquisition module, configured to acquire continuous multi-frame environmental images when the electronic device is in a state of incoming call;
• a processing module, configured to process the continuous multi-frame environmental images to collect a plurality of feature points in the environmental images;
• a determining module, configured to determine whether the plurality of feature points in the continuous multi-frame environmental images have changed;
• and
• a control module, configured to control the transparent display screen to be off when the plurality of feature points have changed;
• wherein the control module is further configured to control the infrared sensor to be on to detect a distance of an object to the electronic device.

An electronic device, comprising:

• a transparent display screen comprising a display area;
• an infrared sensor disposed below the display area, and configured to emit infrared light and receive infrared light reflected by an object to detect a distance of the object to the electronic device;
• a camera module for capturing images;
• and
• a processor configured to acquire continuous multi-frame environmental images captured by the camera module, when the electronic device is in a state of incoming call;
• process the continuous multi-frame environmental images to collect a plurality of feature points in the environmental images;
• determine whether the plurality of feature points in the continuous multi-frame environmental images have changed;
• control the transparent display screen to be off when the plurality of feature points have changed;
• and
• control the infrared sensor to be on to detect a distance of an object to the electronic device.