Patent ID: 11905645
Assignee: LG ELECTRONICS INC.
Field: Other consumer goods (Other fields)
Classification: CPC D | IPC D

Claim 17:
18. A laundry treating apparatus comprising:
a cabinet;
a tub configured to receive water;
a drum rotatably disposed inside the tub, the drum having an open surface configured to receive clothes therethrough and a bottom surface located at an opposite side of the open surface;
a rotator rotatably disposed inside the drum;
a motor configured to drive the drum and the rotator; and
a controller configured to control operation of the motor,
wherein the rotator comprises:
a bottom portion disposed at the bottom surface of the drum,
a pillar that protrudes from the bottom portion toward the open surface of the drum, and
a plurality of blades that are spaced apart from one another along a circumferential direction of the pillar and extend toward the open surface along a direction inclined with respect to a longitudinal direction of the pillar, and

wherein the controller is configured to:
supply power to the motor to rotate the rotator at a predetermined target revolution per minute (rpm) in a state in which water is supplied in the tub,
determine an actual rpm of the rotator,
determine a rpm gap that is a difference between the target rpm of the rotator and the actual rpm, and
determine a cloth material of the clothes based on the rpm gap and whether the motor is in a motor-constrained state in which rotation of the motor is restricted.