Abstract: A light-emitting element includes a first semiconductor layer doped to have a first polarity, a second semiconductor layer doped to have a second polarity different from the first polarity, a light-emitting layer disposed between the first and second semiconductor layers, a shell layer formed on side surfaces of the first semiconductor layer, the light-emitting layer, and the second semiconductor layer, the shell layer including a divalent metal element, and an insulating film covering an outer surface of the shell layer and surrounding the side surface of the light-emitting layer.

Abstract: Provided is a washing machine including: a washing tub connected with an outer rotor and an outer shaft; a pulsator connected with an inner rotor and an inner shaft; and a planetary gear set mounted between the inner rotor and the pulsator and between the outer rotor and the washing tub, to thus reduce a rotational force of the inner shaft, wherein at least one of the pulsator and the washing tub is rotated during performing a washing stroke by allowing the washing tub to be rotated for a period of time when the pulsator is stopping, to thus minimize a washing machine stop time during performing a washing stroke to thereby enhance a running rate and improve washing efficiency.

Abstract: Provided is a stator including: a plurality of stator cores; a bobbin wrapped around an outer circumferential surface of the stator core; and a coil wound around an outer circumferential surface of the bobbin, wherein each of the plurality of stator cores includes a first core portion that is formed by laminating a plurality of iron pieces, and around which a coil is wound, and a second core portion coupled to one end of the first core portion and disposed to face a magnet of a rotor and formed to be wider than an end surface area of the first core portion, and a motor having the same, to thus improve the efficiency of the motor.

Abstract: Provided is a washing machine including: a washing tub connected with an outer rotor and an outer shaft; a pulsator connected with an inner rotor and an inner shaft; and a planetary gear set mounted between the inner rotor and the pulsator and between the outer rotor and the washing tub, to thus reduce a rotational force of the inner shaft, wherein the rotational force of the inner rotor is transmitted to the washing tub by the planetary gear set when a load is applied to the pulsator at the time of an initial start of the inner rotor, to thus lower a starting current and lower an end current at a time when the inner rotor is stopped, to thereby reduce power consumption.

Abstract: A washing machine driving apparatus comprises: a drive motor of a double rotor-double stator structure where the drive motor comprises an inner rotor and an outer rotor controllable independently by a double stator, and optionally generating inner rotor output and outer rotor output; a first inner shaft transferring the inner rotor output as a first input; a first outer shaft rotatably coupled to an outer periphery of the first inner shaft, and transferring the outer rotor output as a second input; a planetary gear unit where a gear ratio of a transmission output generated from a carrier is controlled by the second input applied to a ring gear through the first outer shaft, when the first input is applied to a sun gear through the first inner shaft; and a protection unit protecting the inner rotor where an outer peripheral portion of protection unit is supported by the double stator.

Abstract: Provided is a washing machine including: a washing tub connected with an outer rotor and an outer shaft; a pulsator connected with an inner rotor and an inner shaft; and a planetary gear set mounted between the inner rotor and the pulsator and between the outer rotor and the washing tub, to thus reduce a rotational force of the inner shaft, wherein the rotational force of the inner rotor is transmitted to the washing tub by the planetary gear set when a load is applied to the pulsator at the time of an initial start of the inner rotor, to thus lower a starting current and lower an end current at a time when the inner rotor is stopped, to thereby reduce power consumption.

Abstract: Provided are a stator having a three-coil wiring structure, a BLDC motor using the same, and a driving method thereof, in which coils are wound by using a three-coil wiring method, to thus minimize a ratio between slots and poles, and to thereby reduce cogging noise, and a gap between cores is set small, to thus increase an effective area between a magnet and a core and to thereby reduce leakage magnetic flux. The BLDC motor includes: a stator having a plurality of split cores that are disposed between an inner rotor and an outer rotor, and on which coils of three phases are connected and wound in a three-phase drive method, in which the plurality of split cores include a number of core groups in which the coils of the respective phases are wound on three consecutive split cores in sequence of a forward direction, a reverse direction, and a forward direction, and the three consecutive split cores generate magnetic flux in opposite directions to each other.

Abstract: Provided is a washing machine including: a washing tub connected with an outer rotor and an outer shaft; a pulsator connected with an inner rotor and an inner shaft; and a planetary gear set mounted between the inner rotor and the pulsator and between the outer rotor and the washing tub, to thus reduce a rotational force of the inner shaft, wherein at least one of the pulsator and the washing tub is rotated during performing a washing stroke by allowing the washing tub to be rotated for a period of time when the pulsator is stopping, to thus minimize a washing machine stop time during performing a washing stroke to thereby enhance a running rate and improve washing efficiency.

Abstract: Provided is a stator including: a plurality of stator cores; a bobbin wrapped around an outer circumferential surface of the stator core; and a coil wound around an outer circumferential surface of the bobbin, wherein each of the plurality of stator cores includes a first core portion that is formed by laminating a plurality of iron pieces, and around which a coil is wound, and a second core portion coupled to one end of the first core portion and disposed to face a magnet of a rotor and formed to be wider than an end surface area of the first core portion, and a motor having the same, to thus improve the efficiency of the motor.

Abstract: A washing machine driving apparatus comprises: a drive motor of a double rotor-double stator structure where the drive motor comprises an inner rotor and an outer rotor controllable independently by a double stator, and optionally generating inner rotor output and outer rotor output; a first inner shaft transferring the inner rotor output as a first input; a first outer shaft rotatably coupled to an outer periphery of the first inner shaft, and transferring the outer rotor output as a second input; a planetary gear unit where a gear ratio of a transmission output generated from a carrier is controlled by the second input applied to a ring gear through the first outer shaft, when the first input is applied to a sun gear through the first inner shaft; and a protection unit protecting the inner rotor where an outer peripheral portion of protection unit is supported by the double stator.

Abstract: Provided is a motor for a washing machine including: an inner rotor connected to a dehydrating tub rotating shaft and rotated together; an outer rotor connected to a pulsator rotating shaft and rotated together; and a double stator having a first coil arranged to leave a gap between the inner rotor and the outer rotor and which interacts with the outer rotor, to thereby form a first magnetic circuit and a second coil which interacts with the inner rotor to thereby form a second magnetic circuit, in which a first drive signal is applied to the first coil and a second drive signal different from the first drive signal is applied to the second coil.

Abstract: Provided are a stator having a three-coil wiring structure, a BLDC motor using the same, and a driving method thereof, in which coils are wound by using a three-coil wiring method, to thus minimize a ratio between slots and poles, and to thereby reduce cogging noise, and a gap between cores is set small, to thus increase an effective area between a magnet and a core and to thereby reduce leakage magnetic flux. The BLDC motor includes: a stator having a plurality of split cores that are disposed between an inner rotor and an outer rotor, and on which coils of three phases are connected and wound in a three-phase drive method, in which the plurality of split cores include a number of core groups in which the coils of the respective phases are wound on three consecutive split cores in sequence of a forward direction, a reverse direction, and a forward direction, and the three consecutive split cores generate magnetic flux in opposite directions to each other.

Abstract: Provided is a motor having an integral stator core, which includes: stators including a plurality of split stator cores that are annularly disposed, bobbins that are surrounded on respective outer circumferential surfaces of the stator cores, and coils wound on an outer circumferential surface of each bobbin; and rotors that are arranged with a gap from each stator, in which the stator core is integrally molded to include a yoke around which the coils are wound, and a first flange and a second flange that are formed at both ends of the yoke, and in which coil winding grooves that are formed at height lower than those of the upper and lower surfaces of the first and second flanges, are formed on the upper and lower surfaces as well as the left and right surfaces of the yoke in order to reduce height of the stator core, to thereby enable the motor to be slimmed.

Abstract: Provided is a motor for a washing machine including: an inner rotor connected to a dehydrating tub rotating shaft and rotated together; an outer rotor connected to a pulsator rotating shaft and rotated together; and a double stator having a first coil arranged to leave a gap between the inner rotor and the outer rotor and which interacts with the outer rotor, to thereby form a first magnetic circuit and a second coil which interacts with the inner rotor to thereby form a second magnetic circuit, in which a first drive signal is applied to the first coil and a second drive signal different from the first drive signal is applied to the second coil.