Abstract: Disclosed is a temperature control method for a refrigerator which can minimize a deviation in refrigerant compartment temperature while minimizing the power consumption of the refrigerator.

Abstract: An electrodeless lighting system includes: a resonator which is installed at an exit of a wave guide for guiding microwave generated from a magnetron and making light pass and microwave resonate therein; a bulb positioned in the resonator and having a luminous portion filled with a luminous material emitting light by the microwave energy and a shaft portion integrally extended from the luminous portion; a resonance control member disposed inside the resonator and having a height controlled according to a position of the luminous portion of the bulb and the entire length of the resonator so as to make optimum resonance of the microwave; and a reflector positioned around the resonator for reflecting light emitted from the bulb. Accordingly, the electrodeless lighting system can facilitate light distribution for achieving lateral lighting and a wider range of lighting and simultaneously improve lighting efficiency.

Abstract: Disclosed is an electrodeless lighting system capable of being used as an optical source of an electronic device by being minimized and capable of obtaining an optimum impedance matching and controlling a resonance frequency.

Abstract: A low-output microwave lighting system includes: a rectifier for rectifying general AC power inputted through a power source unit and outputting a DC voltage; a power factor compensator for compensating a power factor of the DC voltage inputted through the rectifier; and an inverter circuit unit for receiving the power factor-compensated DC voltage and outputting an AC voltage through frequency varying. 120 Hz of ripple generated at a low output can be reduce, and it is driven at a frequency of 20 KHz or higher, so that a flicker phenomenon does not occur and a volume and weight in facility can be reduced.

Abstract: An oscillating motor is provided which can be reciprocally rotated within a predetermined rotation region without any conversion device for changing to a linear movement, and which can be simply connected to an existing apparatus. The oscillating motor includes a set of teeth formed on the stator which are configured to engage with a corresponding set of teeth formed on the rotor when the motor is in operation. Alternately formed concave and convex regions on the teeth increase a contact area between the rotor and stator, thus increasing torque and operating efficiency of the motor without increasing size.

Abstract: Disclosed herein is a refrigerator that is capable of rapidly handling a load in a freezing chamber of the refrigerator or a refrigerating chamber of the refrigerator, and preventing stored goods in a rapid cooling chamber from being excessively cooled. The present invention also provides a method of controlling such a refrigerator. The refrigerator comprises a rapid cooling chamber mounted in at least one of the freezing and refrigerating chambers, a rapid cooling channel having one end communicating with an entering channel of the refrigerating chamber and the other end communicating with the rapid cooling channel, and a damper for controlling the flow of cool air passing through the entering channel of the refrigerating chamber and the rapid cooling channel. The damper is controlled on the basis of the load in the freezing or refrigerating chamber and a load in the rapid cooling chamber.

Abstract: In a plasma lamp system, a bulb is filled with both metal halide and mercury as primary light-emitting materials, operating pressure of the metal halide is 0.1˜10 atm, and operating pressure of the mercury is 30˜150 atm, thereby improving a point source of light characteristic and a spectrum characteristic of light. Therefore, the plasma lamp system can be optimally applied to an optical system that requires a point source of light, and can maximize its lighting efficiency.

Abstract: A resonator of an electrodeless lighting system includes a body part formed in a prescribed shape; a transmission space part formed at one side of the body part and having an antenna of an microwave generator therein; a multi-step type resonating space part formed to be opened at one side, having a section gradually widening toward the opened side, receiving the microwave radiated from the antenna by means of an microwave feeder and resonating the microwave; and a stub formed at a certain height at an inner wall of the multi-step type resonating space part. Since the reflector for reflecting light has the enlarged size and is varied in its form to increase the amount of reflected parallel light, an illumination performance is enhanced. In addition, the impedance matching of the microwave exciting the gas filled in the electrodeless bulb and the resonance frequency are controllable.

Abstract: Disclosed is a temperature control method for a refrigerator which can minimize a deviation in refrigerant compartment temperature while minimizing the power consumption of the refrigerator.

Abstract: A concentration cooling apparatus for a refrigerator, including a housing which is respectively mounted in one or more cold air guiding paths formed on a side wall of the chilling chamber to guide cold air to the side wall of the chilling chamber, a nozzle which is rotatably supported in the housing, for concentratedly injecting cold air to a region where a high temperature load is occurred in the chilling chamber, a temperature sensor which is mounted at the front of the nozzle, for sensing the region where the high temperature load is occurred, rotating together with the nozzle, and a nozzle driving portion for rotating the nozzle up and down as well as in the circumferential direction of the nozzle, can swiftly maintain a temperature inside of a chilling chamber as a uniform temperature by concentratedly discharging cold air into a region where a high temperature load is occurred inside the chilling chamber.

Abstract: Disclosed is an optical fiber having a desired dispersion value to sufficiently suppress a non-linearity phenomenon, that is, a four-wave mixing phenomenon, occurring at a channel spacing of 50 GHz while minimizing the expense consumed for a compensation for dispersion. The optical fiber satisfies optical characteristics defined by a dispersion value of 7 to 10 ps/nm-km at a wavelength of 1,550 nm, a zero dispersion wavelength of 1,450 nm or less, and a cut-off wavelength of 1,250 nm or less. The optical fiber includes a core having a desired diameter (d1) and a desired refractive index (n1), the cladding surrounding the core and having a refractive index (ncl) less than the (n1), of the core (ncl<n1) or (n2) less than the outer cladding (n2<ncl). The (n2) of the inner cladding may also be less than the (n1) of the core and more than the (ncl) of the outer cladding.

Abstract: Disclosed is an optical fiber having a desired dispersion value to sufficiently suppress a non-linearity phenomenon, that is, a four-wave mixing phenomenon, occurring at a channel spacing of 50 GHz while minimizing the expense consumed for a compensation for dispersion. The optical fiber satisfies optical characteristics defined by a dispersion value of 7 to 10 ps/nm-km at a wavelength of 1,550 nm, a zero dispersion wavelength of 1,450 nm or less, and a cut-off wavelength of 1,250 nm or less. The optical fiber includes a core having a desired diameter (d1) and a desired refractive index (n1), the cladding surrounding the core and having a refractive index (ncl) less than the (n1), of the core (ncl<n1) or (n2) less than the outer cladding (n2<ncl). The (n2) of the inner cladding may also be less than the (n1) of the core and more than the (ncl) of the outer cladding.

Abstract: An oscillating motor includes: a first teeth having a concave portion and a convex portion at its front surface; a stator having the first teeth by pairs formed at an inner circumferential surface; and a rotor having a concave portion and a convex portion at the front surface of a second teeth in a manner of being engaged with the concave portion and the convex portion formed at the first teeth of the stator. The motor can be reciprocally rotated in the rotation region without any conversion device for changing to a linear movement. In addition, it can be simply connected for use to the existing apparatus.

Abstract: The present invention relates to a driving of a switched reluctance motor, and in particular to a driving device for an SR motor which can detect a position of a rotor of the SR motor by using a smaller number of sensors than phases, and which can drive the SR motor on the basis of the detected result. At an initial stage of the starting of the SR motor, the position detection is not performed, and a microprocessor sequentially outputs a plurality of control signals, thereby aligning the rotor. After the starting, the microprocessor sequentially outputs the plurality of control signals according to a result detected from a position detection unit.