Abstract: A load sharing device for load balancing among a plurality of power supply modules connected in parallel to a single load includes a common voltage control signal output unit and output voltage control units corresponding to the power supply modules, respectively. The common voltage control signal output unit generates a common voltage control signal from output voltages of the power supply modules and outputs the common voltage control signal to the power supply modules. The output voltage control units detect output currents of the power supply modules and control the output voltages of the power supply modules to be in a predetermined voltage range according to the common voltage control signal and the detected output currents.

Abstract: A phase shift full bridge converter with a reduced current stress includes: a switching unit that switches an input voltage; a transformer that includes a first capacitor serially connected to, and having a primary side and a secondary side; an auxiliary circuit unit that includes a first switch, a second switch, and a second capacitor, which are connected in parallel to the secondary side of the transformer; and a rectification unit that is connected to the auxiliary circuit unit, with an output inductor being removed.

Abstract: There is provided a transformer improved in leakage inductance including: a core having first, second and third legs electromagnetically coupled to one another; a primary winding formed of a conductor having one end and another end receiving power from the outside and dividedly wound around the first, second and third legs; and a secondary winding wound around at least one of the first, second and third legs and receiving induced power by electromagnetic induction with the primary winding.

Abstract: The present invention relates to a load sharing device and a parallel power supply therewith. There is provided a parallel power supply, including: a plurality of power supply modules each connected to a single load in parallel to provide balanced output currents to the single load; a common voltage control signal output unit that generates a common voltage control signal from output voltages of the plurality of power supply modules and outputs the common voltage control signals to the plurality of power supply modules; and output voltage control units that are provided in the respective plurality of power supply modules to detect output currents of the plurality of power supply modules and to control output voltages of the plurality of power supply modules according to the detected signals, controlling the output voltages to be in a predetermined voltage range according to the common voltage control signals.

Abstract: A linear motor and a camera module having the linear motor are provided. The linear motor includes: a piezoelectric substrate generating a vibration mode in a longitudinal direction on the basis of an applied voltage; first and second shafts coupled to both sides of the piezoelectric substrate with the piezoelectric substrate interposed therebetween; and a moving member coupled to at least one of the first and second shafts to be movable in the longitudinal direction of the first and second shafts and connected to a camera lens on one side. Accordingly, it is possible to remove a dead zone with a simple structure, to prevent an unnecessary increase in thickness, not to cause a stoppage at the time of moving a camera lens, to cause a small amount of tilt to enable a linear control, and to contribute to a decrease in thickness and a compactness of a mobile terminal.

Abstract: A phase shift full bridge converter with a reduced current stress includes: a switching unit that switches an input voltage; a transformer that includes a first capacitor serially connected to, and having a primary side and a secondary side; an auxiliary circuit unit that includes a first switch, a second switch, and a second capacitor, which are connected in parallel to the secondary side of the transformer; and a rectification unit that is connected to the auxiliary circuit unit, with an output inductor being removed.

Abstract: There is provided a transformer improved in leakage inductance including: a core having first, second and third legs electromagnetically coupled to one another; a primary winding formed of a conductor having one end and another end receiving power from the outside and dividedly wound around the first, second and third legs; and a secondary winding wound around at least one of the first, second and third legs and receiving induced power by electromagnetic induction with the primary winding.

Abstract: A linear motor and a camera module having the linear motor are provided. The linear motor includes: a piezoelectric substrate generating a vibration mode in a longitudinal direction on the basis of an applied voltage; first and second shafts coupled to both sides of the piezoelectric substrate with the piezoelectric substrate interposed therebetween; and a moving member coupled to at least one of the first and second shafts to be movable in the longitudinal direction of the first and second shafts and connected to a camera lens on one side. Accordingly, it is possible to remove a dead zone with a simple structure, to prevent an unnecessary increase in thickness, not to cause a stoppage at the time of moving a camera lens, to cause a small amount of tilt to enable a linear control, and to contribute to a decrease in thickness and a compactness of a mobile terminal.

Abstract: A structure for damping vibration of a shadow mask fitted to a mask supporting body in a flat cathode ray tube is provided. The structure includes a plurality of damper wires each fastened under tension to the mask supporting body for strapping the shadow mask between beam pass through holes in the shadow mask. The damper wires and the shadow mask are configured such that a first order natural frequency of vibration of the damper wire falls outside a range within ±10% of a third order natural frequency of vibration of the shadow mask. The structure improves vibration damping, reduces the number of required components and simplifies the fabrication process.

Abstract: The present invention relates to a flat tension mask type CRT which improves structures of a shadow mask and a panel, herein the shadow mask has a thickness of 50 &mgr;m˜80 &mgr;m, the panel has a transmittance of 47%˜50%, the flat CRT has a luminance of not less than 31FL, and the panel has a thickness of 13 mm˜14.5 mm, accordingly the present invention is capable of heightening productivity and durability, and at the same time improving overall luminance and color vividness by increasing the thickness of the shadow mask.

Abstract: Structure for damping vibration of a shadow mask in a flat cathode ray tube including the shadow mask fitted to a mask supporting body, and a plurality of damper wires each fastened to the mask supporting body for strapping the shadow mask between beam pass through holes in the shadow mask under tension, wherein a first order natural frequency of the damper wire falls on a range outside of a range within ±10% of a third order natural frequency of the shadow mask, thereby improving vibration damping effect, reducing the number of required components and simplifying a fabrication process.

Abstract: In a device for fixing a shadow mask placed between a panel and a shadow mask of a flat CRT (Cathode Ray Tube) and adhered to the panel by a bonding member so as to maintain a constant distance between the panel and the shadow mask, an optimum width of a device for fixing a shadow mask can be calculated in accordance with a tensile force worked on the shadow mask or a variation of a height of the device itself, and a permitted limit of a width of the device can be provided.

Abstract: The present invention relates to a flat tension mask type CRT which improves structures of a shadow mask and a panel, herein the shadow mask has a thickness of 50 &mgr;m˜80 &mgr;m, the panel has a transmittance of 47%˜50%, the flat CRT has a luminance of not less than 31 FL, and the panel has a thickness of 13 mm˜14.5 mm, accordingly the present invention is capable of heightening productivity and durability, and at the same time improving overall luminance and color vividness by increasing the thickness of the shadow mask.