US 9,809,228 B2
Wearable device and method of operating the same
Seungbum Hong, Seoul (KR); Sungwook Hong, Seoul (KR); and Seungyong Lee, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on Aug. 4, 2015, as Appl. No. 14/817,368.
Claims priority of application No. 10-2014-0103845 (KR), filed on Aug. 11, 2014.
Prior Publication US 2016/0039424 A1, Feb. 11, 2016
Int. Cl. B60W 40/08 (2012.01); B60K 28/02 (2006.01); G08B 21/06 (2006.01); G08B 5/36 (2006.01); G08B 6/00 (2006.01); G08B 21/04 (2006.01); G08B 25/08 (2006.01)
CPC B60W 40/08 (2013.01) [B60K 28/02 (2013.01); G08B 5/36 (2013.01); G08B 6/00 (2013.01); G08B 21/0453 (2013.01); G08B 21/06 (2013.01); G08B 25/08 (2013.01); B60W 2040/0872 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A wearable device comprising:
a main body configured to be worn by a user;
a sensing unit configured to sense a biological signal of the user;
a controller configured to:
collect log information including information relating to the biological signal of the user and information relating to a state of the user;
store an index pattern that indicates a correspondence between the information relating to the biological signal of the user with the information relating to the state of the user that are included in the collected log information;
determine a reference driving index that indicates values of the stored index pattern that are suitable for the user to drive a vehicle, wherein when the stored index pattern is changed based on the biological signal that is accumulated for a predetermined period of time, the reference driving index is updated;
based on detecting a vehicle entry event for the user, determine, relative to the reference driving index, a current driving index corresponding to the biological signal of the user that is sensed during a period of time extending before and after the vehicle entry event for the user; and
output feedback for notifying the user of the state of the user corresponding to a result of determining the current driving index,
wherein the reference driving index and the current driving index each includes a stress index and a drowsiness index,
wherein the reference driving index includes threshold values of the stress index and the drowsiness index for which the stress index and the drowsiness index are suitable for the user to safely drive a vehicle,
wherein the stress index and the drowsiness index each includes an index ascending section and an index recovering section, and
wherein the controller is further configured to, based on determining that the current driving index is not suitable for the user to drive:
search the collected log information for information related to a situation that is recorded in the index recovering section corresponding to a current state of the user for which the current driving index is not suitable for the user to drive, and
output, based on the searched log information, the feedback in a manner configured to recreate the situation that is recorded in the index recovering section corresponding to the current state of the user.