TWS Case Opening / Closing
and Earbuds Case-in / Case-out Detection
Tri-axis Magnetic Sensors
In this section, we explain, by using the Tri-axis Magnetic Smart Switch, how to simultaneously detect the opening / closing of the True Wireless Stereo case that is used primarily for triggering Bluetooth pairing / unpairing between the Earbuds and smartphone and case-in / case-out of the right and left Earbuds.
Detection of the open / close status of the True Wireless Stereo case and detection of whether the right and left Earbuds are housed in the case are achieved by using a Tri-axis Magnetic Smart Switch and existing magnets. This technique is used as a trigger for smooth Bluetooth pairing / unpairing between a True Wireless Stereo case or Earbuds and a smartphone.
Tri-axis Magnetic Smart Switch mounted on the case body acquires the magnetic field generated by the magnets on the lid of the True Wireless Stereo case and the magnets (speaker magnets) built into the Earbuds. Whenever the lid is opened or closed or Earbuds are in / out case, the magnetic field that is applied to the Tri-axis Magnetic Switch changes. The status of the Earbuds can be checked by detecting and analyzing the change.
Advantage of this solution
Advantages of tri-axis Magnetic Smart Switch in this application are: