US 12,382,392 B2
Bluetooth device
Chang Hoon Yoo, Seoul (KR); Kyeng Suk Kim, Seoul (KR); and Seung Taek Woo, Seoul (KR)
Assigned to LG INNOTEK CO., LTD., Seoul (KR)
Appl. No. 17/921,209
Filed by LG INNOTEK CO., LTD., Seoul (KR)
PCT Filed Apr. 27, 2021, PCT No. PCT/KR2021/005288
§ 371(c)(1), (2) Date Oct. 25, 2022,
PCT Pub. No. WO2021/225320, PCT Pub. Date Nov. 11, 2021.
Claims priority of application No. 10-2020-0053308 (KR), filed on May 4, 2020.
Prior Publication US 2023/0171696 A1, Jun. 1, 2023
Int. Cl. H04W 52/02 (2009.01); H04W 4/80 (2018.01); H04W 76/30 (2018.01); H04W 84/20 (2009.01)
CPC H04W 52/0225 (2013.01) [H04W 76/30 (2018.02); H04W 84/20 (2013.01); H04W 4/80 (2018.02)] 20 Claims
OG exemplary drawing
 
1. A Bluetooth device comprising a master module and at least one slave module,
wherein the master module operates in an active mode when a mobile communication device is positioned within a preset range and switches to a power saving mode when the mobile communication device deviates from the preset range,
in the active mode, the master module is connected to the mobile communication device positioned within the preset range to perform data communication and operates the Bluetooth device by periodically exchanging a packet with the slave module, and
in the power saving mode, the master module operates in at least one of a first mode in which a packet exchange cycle with the slave modules is adjusted from a first interval to a second interval and a second mode in which a connection between the master module and the slave module are released.