An electronic device according to various embodiment disclosed in the disclosure may include a digitizer panel, a first shielding member which includes a first first shielding member and a second first shielding member disposed on the digitizer panel, the first shielding member being disposed on the rear surface of the digitizer panel, a reinforced plate disposed on the rear surface of the first shielding member, a second shielding member at least a part of which is disposed on the rear surface of the first shielding member, and a waterproof structure, at least a part of which is disposed on the rear surface of the reinforced plate, comprising a waterproof material including a first waterproof member, and a second waterproof member.

A magnetic detection module is provided so as to be selectively mountable in any of housings having a plurality of specifications having different shapes or sizes of mounting portions, and detects magnetic flux generated in the housing. The magnetic detection module includes one or more magnetic sensors that detect magnetic flux, a case in which the magnetic sensors are housed, and a cap that can be attached to an end of the case and is provided with a sealing member. The magnetic detection module can be attached to the housing of the first specification with the cap not attached to the case, and can be attached to the housing of the second specification through a sealing member with the cap attached to the case.

A magnetic read head is provided, comprising a bottom magnetic shield, a first free magnetic layer, a second free magnetic layer, and a top magnetic shield, arranged from bottom to top in this order in a stacking direction from a leading side to a trailing side of the read head. A non-soft bias layer is positioned below the top magnetic shield and on a back side of the first and the second free magnetic layers. The top magnetic shield has a unidirectional anisotropy, the magnetic moments of the top and the bottom magnetic shields are canted relative to a plane of the first and the second free magnetic layers, and the top and the bottom magnetic shields are decoupled from the non-soft bias layer and not magnetically coupled to a soft bias layer.

A magnet-based angular displacement measuring system for detecting a rotational movement of a driveshaft. The magnet-based angular displacement measuring system includes the driveshaft which includes an axial first shaft end region. The axial first shaft end region includes a magnetically non-conductive material. An exciter unit is rotationally coupled to the axial first shaft end region of the driveshaft. A stationary sensor unit functionally cooperates with the exciter unit to detect a rotational movement of the driveshaft.

A device component has a magnetorheological brake device with a static holder and with two brake components. A first brake component is rotationally fixedly to the holder and extends in an axial direction. A second brake component has a hollow, rotary part which is rotatable about the first brake component. An encircling gap between the first and second brake components is filled with a magnetorheological medium. The first brake component has a core of magnetically conductive material which extends in the axial direction. An electrical coil is wound axially around the core and spans a coil plane. A magnetic field of the coil extends transversely through the first brake component. A maximum outer diameter of the electrical coil in a radial direction within the coil plane is greater than a minimum outer diameter of the core in a radial direction transversely to the coil plane.

A magnetic sensor capable of reducing noise caused by an interference magnetic field and capable of outputting a highly accurate signal in accordance with changes in a detected magnetic field includes a magnetic detection element, a first magnetic body having a first surface and a second surface, which is opposite to the first surface, and a second magnetic body positioned approximately in the center of the first magnetic body in the short direction on the first surface of the first magnetic body. The magnetic detection element is provided to be opposite to the second magnetic body with the first magnetic body interposed in between and positioned approximately in the center of the first magnetic body in the short direction. The magnetic sensing direction of the magnetic detection element is a direction approximately parallel to the short direction of the first magnetic body and the second magnetic body, and a width W1 of the first magnetic body is larger than a width W2 of the second magnetic body.

An actuator assembly comprises: a rotatable shaft, a magnet mounted to the rotatable shaft, non-magnet material positioned between the magnet and the shaft, a rotary sensor configured to be responsive to rotation of the magnet for generating a signal, and a housing comprising a magnetic shield surrounding at least a part of the rotary sensor and at least a part of the magnet mounted to the shaft to shield the sensor and the magnet from an external magnetic field. The actuator assembly further comprises a magnet holder fixing the magnet to the shaft. The magnetic shield encompasses the magnetic flux from the magnet to the rotary sensor and also shields the rotary sensor from any external magnetic field such as stray field or magnetic field from the outside of the housing. The non-magnetic material may reduce leakage magnetic flux from the magnet to the shaft.

A control assembly for controlling a speed or torque of operation of an electric device includes a control assembly housing, a magnetic sensor, a magnetic element; and an actuator. The actuator moves relative to the control assembly and, responsive to that movement, the magnetic sensor and magnetic element are moved relative to each other between a first position and a second position so that the magnetic sensor senses a first magnetic field reading when in the first position and senses a second magnetic field reading when in the second position. A control module is operably connected to the magnetic sensor and configured for controlling the electric device, and a magnetic shielding element is positioned within the control assembly housing to alleviate a magnetic signal source external to the control assembly from interfering with the sensing by the magnetic sensor.

An electromagnetic gradiometer that includes multiple torsionally operated MEMS-based magnetic and/or electric field sensors with control electronics configured to provide magnetic and/or electric field gradient measurements. In one example a magnetic gradiometer includes a first torsionally operated MEMS magnetic sensor having a capacitive read-out configured to provide a first measurement of a received magnetic field, a second torsionally operated MEMS magnetic sensor coupled to the first torsionally operated MEMS magnetic sensor and having the capacitive read-out configured to provide a second measurement of the received magnetic field, and control electronics coupled to the first and second torsionally operated MEMS magnetic sensors and configured to determine a magnetic field gradient of the received magnetic field based the first and second measurements from the first and second torsionally operated MEMS electromagnetic sensors.

A brain measurement apparatus configured to generate an MR image and a brain's magnetic field distribution of a subject includes: an MRI module having a transmission coil configured to transmit a transmission pulse toward the subject and a detection coil configured to detect a nuclear magnetic resonance signal generated in the subject by the transmission pulse; an optically pumped magnetometer configured to detect a brain's magnetic field of the subject; a generator configured to generate the MR image based on the nuclear magnetic resonance signal detected by the detection coil and generating the brain's magnetic field distribution based on the brain's magnetic field detected by the optically pumped magnetometer; a marker displayed on the MR image generated by the generator; and a helmet-type frame to which the detection coil, the optically pumped magnetometer, and the marker are attached and which is attached to a head of the subject.