A support device of an embodiment includes a magnet unit, a first member, a second member, a magnetic member, and a magnetic fluid. The magnet unit generates a magnetic force. The first member is formed of a non-magnetic material and is disposed in a first direction of the magnet unit. The second member is formed of a non-magnetic material and is disposed in the first direction of the first member. The magnetic member is formed of a magnetic material and is disposed in the first direction of the second member. The magnetic fluid is disposed between the first member and the second member.

An electronic device and a protective cover having a magnetic structure with multiple opposing poles on a surface for use with magnetically sensitive components is provided. The magnetic structure is configured for aligning the electronic device and the protective cover and for creating a separable magnetic attachment between the electronic device and the protective cover. The magnetic structure includes more than three magnetic sections arranged in a linear configuration, with each of the magnetic sections magnetized in a direction perpendicular to first and second surfaces of the magnetic structure. Adjacent magnetic sections are magnetized in opposing directions such that the magnetic structure does not impair normal operation of a camera, a compass, and an inductive charger in the electronic device.

An accessory for improving wireless power transfer efficiency in a wireless power transfer system can include a magnetic (e.g., ferrite) core dimensioned and positioned so as to reduce flux coupling from the PTx winding into friendly metal of the PRx and/or to enhance flux coupling from the PTx winding to the PRx winding. The core may define an aperture corresponding to an outer dimension (e.g., outer diameter) of the PRx winding. The core may further have an outer dimension selected to intercept sufficient flux to reduce flux coupling into the friendly metal of the PRx, such as an outer dimension corresponding to an outer dimension (e.g., outer diameter) of the PTx winding. The accessory may be a case for the PRx device or may be configured to be affixed to the face of the PTx device and may also include one or more alignment fixtures.

A system for inductive charging is provided. In accordance with an embodiment, the system comprises a permanent magnet structure having two or more discontinuous permanent magnet sections assembled to form a full or partial ring shape. The sections are each magnetized in a direction perpendicular to their top and bottom surfaces in a pattern comprising multiple opposing poles at each surface to reduce an effect of a magnetic field generated by the permanent magnet structure on magnetically sensitive components of the portable device or battery or other nearby devices.

In the present invention, junction capacitance is increased by stabilizing the junction capacitance of rotating electrodes such that a short circuit does not occur between the electrodes. Provided is a rotating electrode unit comprising a rotor electrode unit in which one or more rotor electrodes and one or more rotor spacers are alternately stacked, and a stator electrode unit in which one or more stator electrodes and one or more stator spacers are alternately stacked, wherein the rotating electrode unit is configured such that when the rotor electrodes are power transmitting electrodes, the stator electrodes are power receiving electrodes, when the rotor electrodes are power receiving electrodes, the stator electrodes are power transmitting electrodes, the rotor electrode unit and the stator electrode unit are combined in a nesting arrangement so as to be mutually rotatable, at least the outer peripheral section of the rotor electrodes is constituted by a member comprising a magnetic body, and the stator spacers have a magnet which attracts the outer peripheral section of the rotor electrodes via magnetic force.

Battery packs that can provide power to an electronic device, can be easy to use and simple to connect to the electronic device, have a small and efficient form factor, and can readily be powered for use.

A magnetic eraser can be used for erasing markings drawn on a magnetic sheet. The magnetic eraser includes a housing with a magnet placed in the housing. The magnetic eraser also includes a first magnetic body placed between a first surface of the housing and the magnet. The first surface of the housing can provide a first erasing surface.

An adsorption device includes a substrate, a plurality of magnetic films, and a plurality of magnets. The substrate defines a plurality of receiving grooves spaced apart from each other. Each receiving groove defines a bottom wall and a side wall. Each magnetic film is in one receiving groove and covers the bottom wall and the side wall. The magnetic films are made of magnetic material. Each magnet is in one receiving groove. Each magnetic film is between the substrate and one magnet, a large number of magnetized LEDs of very small size are attracted on a one-to-one basis to the receiving grooves for transfer and placement of the LEDs onto a display panel which is in the course of being manufactured.

A method of steering a moving metal strip by positioning one or more magnetic rotors near a metal strip. Each rotor includes one or more permanent magnets and rotates to impart a changing magnetic field on the metal strip passing nearby. The magnetic rotors can rotate around an axis of rotation that is parallel to the longitudinal direction of travel of the metal strip. The magnetic rotors can be positioned to impart forces on the strip in any combination of laterally, vertically, or longitudinally. A control mechanism can control the rotor speed, rotor direction, vertical position of the rotors, vertical spacing between rotors, and/or lateral position of the rotors. In some cases, the control mechanism can be coupled to sensors, such as a light curtain and a laser distance sensor, in order to provide closed loop feedback control of a metal strip passing through the non-contact magnetic rotor steering device.

A movement device comprising a first and a second assembly, the first assembly being composed of a plurality of subassemblies. Two directly adjacent subassemblies are conterminous with each other at a boundary line. The two subassemblies form at least one first pair of directly adjacent first permanent-magnet arrangements that are separated from each other by the boundary line. The two first permanent-magnet arrangements of the first pair are each arranged with a boundary distance from the boundary line that is reduced with respect to a spacing distance, such that they mutually have the spacing distance. There are present in each case within the said two subassemblies at least one second pair of directly adjacent first permanent-magnet arrangements that mutually have the spacing distance.