Abstract: An optical radar includes an optical-signal receiving unit and an optical-signal pickup unit. The optical-signal receiving unit is configured to receive a reflected light. The optical-signal pickup unit is coupled to the optical-signal receiving unit and includes a first optical-signal filtering circuit and a second optical-signal filtering unit. The first optical-signal filtering circuit is configured to filter out a first interference pulse of the reflected light, wherein the first interference pulse has a first interference voltage value higher than a reference voltage. The second optical-signal filtering circuit is coupled to the first optical-signal filtering circuit and configured to generate a clock signal comprising a clock pulse; and filter out a second interference pulse that does not match the clock pulse in time point from the reflected light.

Abstract: In order to increase an adsorption rate of softener for laundry, a method of controlling a washing machine according to an embodiment includes performing a first rinsing process based on a first target water level and a first duty ratio of a motor; when a second rinsing process is started, supplying water to an intermediate water level of a fixed tub; additionally supplying water to a second target water level together with the softener; setting a duty ratio of the motor to a second duty ratio higher than the first duty ratio; and driving the motor based on the second duty ratio.

Abstract: A washing machine including an auxiliary washing tub in a washing tub, and a method for controlling the same are disclosed. The washing machine includes a main washing tub and an auxiliary washing tub through which different laundry can be classified according to the weight or category of laundry such that the classified laundry can be separately washed. As a result, user convenience increases, and the entire washing time and unnecessary energy consumption can be reduced. When the main washing tub and the auxiliary washing tub are simultaneously operated, when only the main washing tub is independently operated, or when only the auxiliary washing tub is independently operated, laundry can be effectively washed in different ways in the washing tub and the auxiliary washing tub according to an optimum washing algorithm achieved by a combination of washing-tub rotation and pulsator rotation, such that laundry can be less damaged and washing performance can be improved.

Abstract: In order to increase an adsorption rate of softener for laundry, a method of controlling a washing machine according to an embodiment includes performing a first rinsing process based on a first target water level and a first duty ratio of a motor; when a second rinsing process is started, supplying water to an intermediate water level of a fixed tub; additionally supplying water to a second target water level together with the softener; setting a duty ratio of the motor to a second duty ratio higher than the first duty ratio; and driving the motor based on the second duty ratio.

Abstract: A washing machine including an auxiliary washing tub in a washing tub, and a method for controlling the same are disclosed. The washing machine includes a main washing tub and an auxiliary washing tub through which different laundry can be classified according to the weight or category of laundry such that the classified laundry can be separately washed. As a result, user convenience increases, and the entire washing time and unnecessary energy consumption can be reduced. When the main washing tub and the auxiliary washing tub are simultaneously operated, when only the main washing tub is independently operated, or when only the auxiliary washing tub is independently operated, laundry can be effectively washed in different ways in the washing tub and the auxiliary washing tub according to an optimum washing algorithm achieved by a combination of washing-tub rotation and pulsator rotation, such that laundry can be less damaged and washing performance can be improved.

Abstract: Disclosed herein is a washing machine capable of realizing a circulation function and a bubble function at the same time. The washing machine includes a main body, a tub provided in the main body, a pump provided to circulate wash water into the tub, and a circulation bubble unit provided on a flowing route of the wash water flowing out from the pump, wherein the circulation bubble unit is provided to be connected with the tub, and includes a first fluid path provided so that some of the wash water flowing out from the pump is circulated into the tub, and a second fluid path provided to generate bubbles in the wash water using another some of the wash water.

Abstract: A pulsator device that generates a composite stream of water to improve performance of a washing machine. The pulsator device includes a first pulsator configured to be rotated about a rotary shaft, a shaft connected to the first pulsator such that the shaft is rotated with the first pulsator, the shaft being eccentric with respect to the rotary shaft, and a second pulsator rotatably coupled to the shaft.

Abstract: A washing machine capable of increasing the washing capacity without enlarging the external appearance and also discharging a washing water during a washing operation or a spin-dry operation while completely isolated from electronic parts and thus reducing the risk of a power failure and fire, the washing machine including a body, a rotating tub rotatably disposed inside the body, a pulsator rotatably disposed inside the rotating tub, a driving part provided on a lower portion of the rotating tub to selectively rotate the rotating tub and the pulsator, a base plate to which the driving part is fixed, wherein a waterproofing member is provided between the base plate and a bottom of the body to seal the driving part and to prevent water from reaching the driving part.

Abstract: Disclosed herein is a washing machine capable of realizing a circulation function and a bubble function at the same time. The washing machine includes a main body, a tub provided in the main body, a pump provided to circulate wash water into the tub, and a circulation bubble unit provided on a flowing route of the wash water flowing out from the pump, wherein the circulation bubble unit is provided to be connected with the tub, and includes a first fluid path provided so that some of the wash water flowing out from the pump is circulated into the tub, and a second fluid path provided to generate bubbles in the wash water using another some of the wash water.

Abstract: A washing machine includes a cabinet forming an external appearance of the washing machine, a rotary tub disposed to rotate around a driving shaft vertically provided inside the cabinet and including a sidewall, which extends with inclination to have a diameter increasing from a lower side to an upper side of the washing machine, and at least one protrusion part, which protrudes from the sidewall with inclination to have a diameter increasing from an upper side to a lower side of the sidewall. A guide water filter is mounted on at least one protrusion part inside the rotary tub and provided at a rear surface thereof with a drain passage to discharge the washing water discharged from the balance ring to outside. A base is installed at the lower side of the rotary tub and includes a guide part and a support plate.

Abstract: A pulsator device in which a second pulsator performs different movements according to rotating directions of a first pulsator so as to reduce water consumption and improve washing performance.

Abstract: A washing machine includes a cabinet forming an external appearance of the washing machine, a rotary tub disposed to rotate around a driving shaft vertically provided inside the cabinet and including a sidewall, which extends with inclination to have a diameter increasing from a lower side to an upper side of the washing machine, and at least one protrusion part, which protrudes from the sidewall with inclination to have a diameter increasing from an upper side to a lower side of the sidewall. A guide water filter is mounted on at least one protrusion part inside the rotary tub and provided at a rear surface thereof with a drain passage to discharge the washing water discharged from the balance ring to outside. A base is installed at the lower side of the rotary tub and includes a guide part and a support plate.

Abstract: A washing machine capable of increasing the washing capacity without enlarging the external appearance and also discharging a washing water during a washing operation or a spin-dry operation while completely isolated from electronic parts and thus reducing the risk of a power failure and fire, the washing machine including a body, a rotating tub rotatably disposed inside the body, a pulsator rotatably disposed inside the rotating tub, a driving part provided on a lower portion of the rotating tub to selectively rotate the rotating tub and the pulsator, a base plate to which the driving part is fixed, wherein a waterproofing member is provided between the base plate and a bottom of the body to seal the driving part and to prevent water from reaching the driving part.

Abstract: A Washing machine washes laundry in a wobbling fashion to improve washing force and to prevent damage to the laundry. The washing machine includes a pulsator rotatably mounted at the lower part of a rotary tub to generate a water current and to move laundry, a plurality of lifters protruding from the top of the pulsator to raise the laundry during rotation of the pulsator, and a movement changing member formed at the upper end of each of the lifters to drop the laundry raised by a corresponding one of the lifters. The movement changing member includes a roller rotated by friction with the laundry.

Abstract: A control method of a washing machine including receiving purpose data of laundry, determining an operating course based on the purpose data of the laundry, and controlling washing of the laundry according to the determined operating course. The operating course is determined by confirming a material of laundry and predicting kind and amount of contamination of the laundry based on the purpose data of the laundry, thereby performing proper washing according to the purpose of the laundry whenever washing of the laundry is performed. Further, proper washing is performed according to the kind and amount of contamination of the laundry, thereby improving utility of the washing machine. Contamination degrees of wash water and rinse water during washing and rinsing cycles are detected, and a washing time and a frequency of times of the rinsing cycle are adjusted based on the contamination degrees, thereby increasing washing efficiency.

Abstract: A pulsator device in which a second pulsator performs different movements according to rotating directions of a first pulsator so as to reduce water consumption and improve washing performance.

Abstract: A pulsator device that generates a composite stream of water to improve performance of a washing machine. The pulsator device includes a first pulsator configured to be rotated about a rotary shaft, a shaft connected to the first pulsator such that the shaft is rotated with the first pulsator, the shaft being eccentric with respect to the rotary shaft, and a second pulsator rotatably coupled to the shaft.