Abstract: A method for washing laundry and a washing machine, in which balancing of the laundry load is effectively carried out. The method for washing includes supplying wash water mixed with a detergent, spinning or rinsing the laundry by rotating the washing machine drum in which the laundry is located, thereby causing the laundry to be repeatedly lifted within and then fall towards the bottom of the drum. The method further involves balancing the laundry by repeatedly accelerating and decelerating the drum. The wash water is then drained.

Abstract: A washing method and a washing machine are provided. Wash water is drained from a tub prior to initiating a main spinning process, and wash water is supplied into a drum to decrease the volume of the laundry which is increased by the draining. Therefore, it is possible to effectively reduce the volume of laundry and thus to improve the mobility of the laundry. Then, a main spinning process is performed by spinning the drum at high speed.

Abstract: There is provided a semiconductor light-emitting device including a substrate having a first refractive index, a nitride semiconductor layer formed on the substrate and having a second refractive index that is different from the first refractive index, a light-emitting structure formed on the nitride semiconductor layer and including a first conductive semiconductor layer, an active layer, and a second conductive semiconductor layer, and an optical extraction film disposed between the substrate and the nitride semiconductor layer and having a refractive index between the first refractive index and the second refractive index.

Abstract: A washing machine and associated washing method are provided. The method may include rotating a drum, measuring and storing a vibration level of a cabinet while increasing a rotational speed of the drum, and measuring the vibration level of the cabinet after the rotational speed of the drum reaches a target rotational speed and determining whether or not the vibration level of the cabinet is greater than a set value. The method may then include adjusting the rotational speed of the drum if the vibration level is greater than the set value so as to minimize vibration and resonance in a support surface on which the washing machine is positioned.

Abstract: A method and apparatus for controlling a motor, a washing machine, and a method of controlling the washing machine that efficiently calculate an amount of laundry within a drum are provided. The method of controlling a washing machine that calculates an amount of laundry housed within a drum rotating by a motor, the method includes: accelerating the drum from a first rotation speed to a second rotation speed by enabling the motor to apply torque to the drum in a predetermined direction and decelerating the drum from the second rotation speed to the first rotation speed by enabling the motor to apply torque to the drum in an opposite direction; and calculating the laundry amount from the sum of currents applied to the motor at the accelerating of the drum.

Abstract: A washing machine and a controlling method of the same are disclosed. A washing machine includes a cabinet (10) defining an exterior appearance thereof, a tub (20) provided in the cabinet (10), the tub (20) receiving wash water therein, a drum (30) rotatable inside the tub (20), the drum (30) receiving laundry therein, a plurality of sensor members (100,102,104,112,116,120,130) installed in at least one of the drum (30) and tub (20), each of the sensor members (100,102,104,112,116,120,130) sensing the distance between the drum (30) and the tub (20), and a control part controlling the drum (30) based on a sensing value sensed by the sensor members (100,102,104,112,116,120,130). An object of the present invention is to provide a washing machine having a secured tub (20) that is able to prevent collision between a drum (30) and the tub (20), and a controlling method thereof.

Abstract: A method for sensing vibration of a washing machine including an outer tub installed within a main body, an inner tub rotatably installed within the outer tub, and a motor that drives the inner tub, includes: distributing the laundry put in the inner tub; sensing actual vibration generated when the motor is acceleratedly operated; sensing unbalance mass generated during the accelerated operation of the motor; comparing the sensed actual vibration and the sensed unbalance mass with a reference vibration and a reference unbalance mass; and driving the motor based on the comparison result of the vibration and the unbalance mass.

Abstract: A washing method and a washing machine are provided. Wash water is drained from a tub prior to initiating a main spinning process, and wash water is supplied into a drum to decrease the volume of the laundry which is increased by the draining. Therefore, it is possible to effectively reduce the volume of laundry and thus to improve the mobility of the laundry. Then, a main spinning process is performed by spinning the drum at high speed.

Abstract: A method for washing laundry and a washing machine, in which balancing of the laundry load is effectively carried out. The method for washing includes supplying wash water mixed with a detergent, spinning or rinsing the laundry by rotating the washing machine drum in which the laundry is located, thereby causing the laundry to be repeatedly lifted within and then fall towards the bottom of the drum. The method further involves balancing the laundry by repeatedly accelerating and decelerating the drum. The wash water is then drained.

Abstract: A washing machine and associated washing method are provided. The method may include rotating a drum, measuring and storing a vibration level of a cabinet while increasing a rotational speed of the drum, and measuring the vibration level of the cabinet after the rotational speed of the drum reaches a target rotational speed and determining whether or not the vibration level of the cabinet is greater than a set value. The method may then include adjusting the rotational speed of the drum if the vibration level is greater than the set value so as to minimize vibration and resonance in a support surface on which the washing machine is positioned.

Abstract: A washing machine is provided. The washing machine controls a dehydration rotation speed by detecting a phase difference between a ball balancer and the laundry. Further, the washing machine controls a dehydration rotation speed at a dehydration segment based on a dehydration rotation speed of a driving device. Thereby, the washing machine minimizes energy using in a dehydration process by accelerating the dehydration rotation speed at a point at which a phase difference between the ball balancer and the laundry is a maximum. Further, by accelerating the dehydration rotation speed at a point at which the phase difference is a maximum, a vibration of the washing machine is remarkably reduced.

Abstract: A method for sensing vibration of a washing machine including an outer tub installed within a main body, an inner tub rotatably installed within the outer tub, and a motor that drives the inner tub, includes: distributing the laundry put in the inner tub; sensing actual vibration generated when the motor is acceleratedly operated; sensing unbalance mass generated during the accelerated operation of the motor; comparing the sensed actual vibration and the sensed unbalance mass with a reference vibration and a reference unbalance mass; and driving the motor based on the comparison result of the vibration and the unbalance mass.

Abstract: A washing machine and a method of controlling spin drying thereof are provided. The method includes detecting an imbalance of a washing tub while rotating the washing tub after rinsing is completed, injecting water into the laundry in the washing tub based upon the imbalance of the washing tub, and detecting the imbalance of a washing tub while rotating the washing tub after the injecting of water. Therefore, since the imbalance detecting process of the washing tub can be reduced after rinsing is completed, the time necessary for beginning main spin drying of the laundry can be reduced.