US 11,901,756 B2
Charging cable with charge state indication
Shaheen Moubedi, Los Angeles, CA (US)
Assigned to SNAP INC., Santa Monica, CA (US)
Filed by Snap Inc., Santa Monica, CA (US)
Filed on Dec. 19, 2022, as Appl. No. 18/083,715.
Application 18/083,715 is a continuation of application No. 16/796,651, filed on Feb. 20, 2020, granted, now 11,552,490, issued on Jan. 10, 2023.
Claims priority of provisional application 62/809,805, filed on Feb. 25, 2019.
Prior Publication US 2023/0119852 A1, Apr. 20, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H02J 7/00 (2006.01); G01R 31/385 (2019.01); G01R 31/382 (2019.01); H03K 19/0175 (2006.01)
CPC H02J 7/0047 (2013.01) [G01R 31/382 (2019.01); G01R 31/385 (2019.01); H02J 7/0019 (2013.01); H02J 7/00041 (2020.01); H02J 7/0068 (2013.01); H02J 7/007184 (2020.01); H03K 19/0175 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system, comprising:
a chargeable device including:
a battery charger circuit; and
a receiver including contact pads coupled to the battery charger circuit and to ground of the chargeable device;
a charging cable including:
power and ground buses;
a cable head having power and ground pins coupled respectively to the power and ground buses and configured to engage the contact pads, when the cable head is coupled to the receiver of the chargeable device;
a current sensor coupled to at least one of the buses to detect current flow via the pins of the cable head;
a state indicator for providing an output perceptible to a user; and
logic circuitry coupled to operate the state indicator, the logic circuitry configured to compare level of current detected by the current sensor to a threshold and, in response to results of the comparison, control the state indicator to provide a perceptible output and maintain the perceptible output while the current sensor periodically detects peaks of modulated current pulses at or above the threshold.