A switching device including: a housing; a moveable element made of a header, a first magnet and a second magnet and slidably mounted in the housing, the moveable element being adapted to move relative to the housing between a released position and an engaged position; and a printed circuit board including a microcontroller and an upper face on which are mounted upfront a first magnetic sensing element and a second magnetic sensing element positioned to face the first magnet and the second magnet, wherein the first magnetic sensing element and the second magnetic sensing element are configured to detect respectively a first magnetic field and a second magnetic field generated respectively by the first magnet and the second magnet, wherein the moveable element is closer to the first magnetic sensing element and the second magnetic sensing element in the engaged position than in the resting position, wherein the pole configuration of the first magnet is opposed to the pole configuration of the second magnet and the first magnetic field generated by the first magnet is reversed and equal in magnitude with respect to the second magnetic field generated by the second magnet, wherein the first magnetic sensing element and the second magnetic sensing element are able to produce respectively a first output signal and a second output signal from the first magnetic field and the second magnetic field, wherein the microcontroller is able to validate a reliable position of the moveable element: if the first output signal is included in a first range of values and if the second output signal is included in a second range of values, and if the sum of the first output signal and the second output signal is substantially equal to a predefined value derived from the difference between the magnitude of the first magnetic field and the magnitude of the second magnetic field.

A pressure sensing display module has a display area and a wiring area surrounding a periphery of the display area. The pressure sensing display module includes a force sensitive unit provided in the wiring area; and a display unit provided corresponding to the display area. Information generated by the display unit is displayed on the display area.

A switching device includes: a header, a first magnet and a second magnet, a first magnetic sensing element and a second magnetic sensing element, a first inductor and a second inductor, a printed circuit board including an upper face on which are mounted upfront the first magnetic sensing element and the second magnetic sensing element and a lower face on which are mounted upfront the first inductor and the second inductor, a first microcontroller unit and a second microcontroller unit, wherein the first microcontroller unit and the second microcontroller unit are configured to send a stimulus signal respectively to the second conductor and to the first conductor, wherein the first microcontroller unit is configured to read a response produced by the first magnetic sensing element, the response corresponding to a magnetic field produced by the first inductor having received the stimulus signal sent by the second microcontroller unit, wherein the second microcontroller unit is configured to read a response produced by the second magnetic sensing element, the response corresponding to a magnetic field produced by the second inductor having received the stimulus signal sent by the first microcontroller unit, wherein the first microcontroller unit and the second microcontroller unit are configured to determine a state of the switching device based on the read responses.

A circuit for operating a capacitive sensor configured to be operated alternately in a first mode over a first time interval and in a second mode over a second time interval. The circuit includes a GM stage configured to receive a sensor voltage of the capacitive sensor at a first input contact and convert the sensor voltage into a sensor current to charge a first boxing capacitor with the sensor current in the second time interval, an integrator that is configured to, in the second interval, integrate a voltage applied across the first boxing capacitor over its time curve and output a resulting output voltage at a first output, and a hold circuit configured to tap the output voltage of the integrator in the second interval and hold it as a hold voltage.

A method is provided for actuating a hand-held machine tool including a drive device, with a control device for actuating the drive device and at least two capacitive sensor elements operatively connected to the control device being provided. The method includes the following method steps of determining an electrical charge of the first and second sensor element comparing the determined first electrical charge with a defined first threshold value and the determined second electrical charge with a defined second threshold value; enabling the actuation of the drive device and/or defined activation of the drive device via the control device when a predefined condition exists between the determined first electrical charge of the first sensor element and the determined detected second electrical charge of the second sensor element. A machine tool for carrying out a method of this kind is also described.

A calibration system for induction keys includes a signal source and a computing device. The signal source is configured to generate a low frequency (LF) signal and a magnetic field signal at intervals. The computing device is configured to receive the magnetic field signal transmitted by an induction key when the induction key senses the LF signal. The computing device is configured to obtain a magnetic field strength from the magnetic field signal, and then comparing the magnetic field strength with a pre-stored standard strength of the magnetic field to achieve an offset. The computing device sends the offset value to the induction key and enables the induction key to get a calibrated strength value of the magnetic field according to the offset value. This disclosure further provided an induction key and a calibration method.

A control circuit for controlling a data input/output is provided. The control circuit comprises a plurality of control level circuits that include a first control level circuit and a last control level circuit. Each control level circuit has a control element, with a number of control elements of the last control level circuit being greater than a number of control elements of the first control level circuit. Each control element is configured to receive a first control signal and a second control signal, and controls a current for the data input/output depending on the first and second control signals. The control circuit is configured to provide the first control signal to the control elements in a sequence starting at the first control level circuit and ending at the last control level circuit, and then to provide the second control signal to the last control level circuit in reverse order.

Embodiments of the present disclosure provide a method and apparatus for determining a pressure reference value, and a chip and an electronic device. The method includes: consecutively acquiring N pressure signals by a pressure sensor; acquiring consecutive N pressure values on the basis of the N pressure signals; and determining a latest pressure reference value on the basis of the consecutive N pressure values and time characteristics of the consecutively acquired N pressure signals; wherein each of the pressure values is a difference between a sampling value corresponding to a pressure signal and the pressure reference value, and the consecutively acquired N pressure signals are acquired within a duration where a pressure is applied to the pressure sensor once, N being a positive integer greater than 0.

A pressure sensing display module has a display area and a wiring area surrounding a periphery of the display area. The pressure sensing display module includes a force sensitive unit provided in the wiring area; and a display unit provided corresponding to the display area. Information generated by the display unit is displayed on the display area.

The present invention provides a low-pressure capacitive tactile sensor for measuring tactile pressures in a range of approximately 0.5 kPa to approximately 20 kPa, the sensor including a first flexible electrode layer; a second flexible electrode layer; a micro-patterned, discontinuous, flexible, UV-curable in approximately 60 seconds or less, elastic polymer nano-imprinted dielectric layer; and a ground shielding layer disposed above the first flexible electrode layer and below the second flexible electrode layer of the capacitive tactile sensor respectively to minimize electromagnetic and capacitive interference. The pressure sensing range of the capacitive tactile sensor is approximately 0.5-20 kPa, the sensitivity is approximately greater than 0.12 pF/kPa. A method for fabricating the capacitive tactile sensor is also provided.