System and method for detecting ear location of earphone and rechanneling connections accordingly and earphone using same

A wearing state detection system for an earphone, comprising

• at least one processing unit;
• and
• a non-transitory computer readable medium coupled to the at least one processing unit and configured to store instructions for execution by the at least one processing unit, the instructions causing the at least one processing unit to:
• capture auditory meatus images of an external ear of a user and obtaining an auditory meatus feature point from the captured auditory meatus images;
• and
• detect a first contact point and a second contact point;
• the first contact point being where the touch sensor contacts an antitragus of the external ear of the user;
• and the second contact point being where the touch sensor contacts a tragus of the external ear of the user;
• draw an imaginary circle digitally, wherein the imaginary circle has a default radius, the imaginary circle intersects the first contact point and the second contact point, and the auditory meatus feature point is within the imaginary circle;
• rotate the imaginary circle together with the first contact point, the second contact point and the auditory meatus feature point about a center of the imaginary circle until the auditory meatus feature point is just above the center;
• determine that the earphone is worn on a left ear of the user when the auditory meatus feature point is just above the center and the second contact point is on a left side of an imaginary line defining between the center and the auditory meatus feature point;
• determine that the earphone is worn on a right ear of the user when the second contact point is on a right side of the imaginary line;
• switch to a left channel to output sound data when the earphone is worn on the left ear;
• and
• switch to a right channel to output the sound data when the earphone is worn on the right ear.

A wearing state detection method for an earphone, comprising

• capturing auditory meatus images of an external ear of a user and obtaining an auditory meatus feature point from the captured auditory meatus images;
• detecting a first contact point and a second contact point;
• the first contact point being where the touch sensor contacts an antitragus of the external ear of the user;
• and the second contact point being where the touch sensor contacts a tragus of the external ear of the user;
• drawing an imaginary circle digitally, wherein the imaginary circle has a predefined radius, the imaginary circle intersects the first contact point and the second contact point, and the auditory meatus feature point is in the imaginary circle;
• rotating the imaginary circle together with the first contact point, the second contact point and the auditory meatus feature point about a center of the imaginary circle until the auditory meatus feature point is just above the center;
• determining that the earphone is worn on a left ear of the user when the auditory meatus feature point is just above the center and the second contact point is on a left side of an imaginary line defining between the center and the auditory meatus feature point;
• determining that the earphone is worn on a right ear of the user when the second contact point is on a right side of the imaginary line;
• switching to a left channel to output sound when the earphone is worn on the left ear;
• and
• switching to a right channel to output sound when the earphone is worn on the right ear.