Abstract: A touch sensing method includes: generating respective oscillation signals having a resonant frequency, the respective oscillation signals being changeable according to a plurality of touch inputs applied to a first touch switch unit and a second touch switch unit, formed in a housing of an electronic device; analyzing the applied plurality of touch inputs, based on a change in the resonant frequency of the generated oscillation signals; and discerning and sensing a type of a touch operation according to a pattern of the plurality of touch inputs, based on results of the analyzing of the applied plurality of touch inputs.

Abstract: A touch sensing device includes: a first touch sensing unit including a first sensing electrode and a first sensing inductor electrically connected to each other, wherein capacitance of the first touch sensing unit varies depending on parasitic capacitance formed between the first sensing electrode and a human body according to a contact of the human body; a first force sensing unit including a first sensing coil spaced apart from an internal side surface of a frame, wherein inductance of the first force sensing unit varies depending on a change in distance between the first sensing coil and the frame according to a pressing touch; and a circuit unit configured to detect whether a touch of the human body is input, based on variations in the capacitance of the first touch sensing unit and variations in the inductance with the force sensing unit.

Abstract: A touch sensing device configured to be installed in an electronic device, the electronic device including a side unit and a touch switch unit, the side unit including a non-conductive cover and a conductive frame coupled to the cover, the touch switch unit including a first touch member that is a portion of the cover, the touch sensing device including a first sensing electrode configured to be disposed inside the electronic device near the first touch member; a first sensing coil configured to be disposed inside the electronic device; and a first connection wire including one end connected to the first sensing electrode and another end connected to the first sensing coil, thereby electrically connecting the first sensing electrode to the first sensing coil.

Abstract: A switching operation sensing device includes an input operation unit, an oscillator circuit, a frequency digital converter, and a touch-force detector circuit. The input operation unit, integrally formed with a housing, includes a first switch member and a second switch member disposed in different positions. The oscillator circuit is configured to generate a first oscillation signal based on varying capacitance when the first switch member is touched, and a second oscillation signal based on varying inductance when an input force is applied to the second switch member. The frequency digital converter is configured to convert the first oscillation signal to a first count value, and convert the second oscillation signal to a second count value.

Abstract: A touch sensing device includes: first and second touch sensor devices disposed on internal surfaces of first and second touch sensing members, respectively; a force sensor device spaced apart from an internal surface of a force sensing member; an oscillation circuit configured to generate a first oscillation signal, based on a change in capacitance in response to the first touch sensing member being touched; generate a second oscillation signal, based on a change in capacitance in response to the second touch sensing member being touched; and generate a third oscillation signal, based on a change in inductance depending on a change in spacing between the force sensing member and the force sensor device; and a touch detection circuit configured to adjust a threshold for force sensing through the force sensor device depending on positions of the first and second touch sensing members, based on the first and second oscillation signals.

Abstract: A force operation sensing device is provided. The device includes an input operation unit comprising a first operating member integrally formed with a housing, a magnetic member disposed inside the input operation unit, and an oscillating circuit comprising a first inductor element and a second inductor element, wherein when a force operation is applied to the first operating member, the oscillating circuit is configured to generate a first variable resonant frequency based on an interaction between the first operating member and the first inductor element, and generate a second variable resonant frequency based on an interaction between the magnetic member and the second inductor element.

Abstract: A self-checking circuit includes: an edge detector configured to output an edge detection signal having a pulse generated during detection of an edge of a pulse signal having a pulse train; a charging and discharging circuit configured to perform a charging operation and a discharging operation based on the edge detection signal to generate a detection voltage; and a comparison circuit configured to check whether the pulse signal is normal, based on the detection voltage, to output a checking signal.

Abstract: A moving object sensing control circuit includes: a control circuit configured to determine, based on a mode signal, whether to operate in a sensing mode or a power saving mode, and control, in the power saving mode, a sensing operation in a sensing stage and a standby operation in a standby stage; an LC oscillation circuit configured to generate an oscillation signal based on an impedance value corresponding to relocation of a moving object, by performing the sensing operation or the standby operation in response to control of the control circuit; and a sensing circuit configured to obtain a period count value of the sensing oscillation signal using a reference oscillation signal and a main oscillation signal, and output an output signal having movement information of the moving object based on the period count value, by performing the sensing operation in response to the control of the control circuit.

Abstract: A force sensing device includes: a substrate disposed inside a housing and spaced apart from inner side surfaces of a first force member and a second force member; a first inductor element mounted on a first surface of the substrate and spaced apart from the first force member, the first inductor element having a first inductance, variable at a time of force input pressing the first force member; a second inductor element mounted on the first surface of the substrate and spaced apart from the second force member, the second inductor element having a second inductance, variable at a time of force input; and a support member having one end contacting the first surface of the substrate between the first inductor element and the second inductor element and another end contacting an inner side surface of the housing between the first force member and the second force member.

Abstract: A switching operation sensing apparatus includes an input operation unit, an oscillation circuit, a frequency digital converter, and a touch detection circuit. The input operation unit includes a first switching member integrally formed with a housing. The oscillation circuit is configured to generate an oscillation signal having a resonant frequency, varying based on a capacitive change or an inductive change, depending on a touch input member in contact with the first switching member during an input operation. The frequency digital converter is configured to convert the oscillation signal into a count value. The touch detection circuit is configured to detect capacitive sensing and inductive sensing based on a slope change of the count value received from the frequency digital converter, and output corresponding touch detection signals of different levels based on the detection.

Abstract: A touch sensing device applied to an electronic device including a side portion having a cover that is nonconductive, and a frame that is conductive, includes: a first touch sensing portion including a first sensing electrode and a first sensing inductor disposed inside the cover and electrically connected to each other, wherein, in response to a touch applied through the cover by a human body, a capacitance is varied by the first touch sensing portion according to parasitic capacitance generated between the first sensing electrode and the human body according to the touch applied through the cover; and a reference sensing portion including a reference coil disposed inside the side portion and configured to provide reference inductance of the reference coil that is constant, regardless of a touch applied through the frame.

Abstract: A touch sensing device includes a touch switching unit including first and second touch members, an oscillator circuit generating a first oscillation signal having a variable resonant frequency based on an application of a touch to the first touch member, and generate a second oscillation signal having a variable resonant frequency based on an application of a touch to the second touch member; a detector circuit generating a first count value by converting the first oscillation signal to a first digital value, and generating a second count value by converting the second oscillation signal to a second digital value, detect an individual touch input based on the first count value and the second count value, and detect a slide touch input when a first touch input to the first touch member and a second touch input to the second touch member are detected within a predetermined slide reference time.

Abstract: A switching operation sensing device is provided. The device includes a touch operation unit that is integrally formed with a housing and includes first and second touch members disposed in different regions; an oscillator circuit configured to generate a first oscillation signal including a variable resonant frequency when the first touch member is touched and a second oscillation signal including a variable resonant frequency when the second touch member is touched; and a touch detector circuit configured to detect whether at least one of the first and second touch members has been touched, and distinguish touch regions based on the first oscillation signal and the second oscillation signal.

Abstract: A controller IC of a touch sensing apparatus includes an oscillation circuit including a capacitor connected to a sensing coil, a digital converter configured to count an oscillation signal output from the oscillation circuit and to output a count value, and a contact detector configured to calculate variations in the count value during delay times, and to detect a contact strength of an object according to the variations.

Abstract: A touch operation sensing device includes a touch interaction switch integrally formed with a housing and including a conductive first touch member having a first insulated hole, and a sensing coil disposed inside the first touch member. The touch operation sensing device includes an oscillation circuit and a touch detection circuit. The oscillation circuit is configured to generate an oscillation signal having a variable resonance frequency based on a touch capacitance generated by an interaction with a touch body touching the first touch member, the first insulated hole, and the sensing coil. The touch detection circuit is configured to detect a touch interaction using the oscillation signal from the oscillation circuit.

Abstract: A force operation sensing device is provided. The device includes an input operation unit comprising a first operating member integrally formed with a housing, a magnetic member disposed inside the input operation unit, and an oscillating circuit comprising a first inductor element and a second inductor element, wherein when a force operation is applied to the first operating member, the oscillating circuit is configured to generate a first variable resonant frequency based on an interaction between the first operating member and the first inductor element, and generate a second variable resonant frequency based on an interaction between the magnetic member and the second inductor element.

Abstract: A switching operation sensing apparatus includes an input operation unit including a first detector integrally formed with a housing; a current variable oscillation circuit generating an oscillation signal having a frequency that varies based on a change in a capacitance from a human body touch on the operating unit, or a change in an inductance from a non-human body touch on the operating unit, and regulate an operating current in response to a control signal; an input operation detection circuit identifying the touch to be from the human body touch, and identifying the touch to be from the non-human body touch based on characteristics of the varied frequency, and generating detection signals having different levels based on the identification of the touch; and a control circuit that determines a sensing manner based on the detection signals and generating the control signal current based on the determined sensing manner.

Abstract: A touch sensing device includes a conductor disposed inside a housing and spaced apart from the housing by a predetermined first distance, a touch member integrated with the housing and including an inductor element disposed inside the housing spaced apart from the conductor by a predetermined second distance, an oscillation circuit including the inductor element, and configured to generate an oscillating signal having different frequency change characteristics for each of a touch input and a touch-force input through the touch member, and an operation detection circuit configured to detect one or more of the touch input and the touch-force input in response to the frequency change characteristics of the oscillating signal from the oscillation circuit.

Abstract: A touch sensing device in an electronic device, the electronic device including a touch manipulation unit disposed in a housing of the electronic device, the touch manipulation unit including a first insulating member penetrating through the housing, the touch sensing device including a first sensor unit disposed on an internal surface of the first insulating member, and an oscillation circuit connected to the first sensor unit, the oscillation circuit being configured to generate a first oscillation signal having a first resonance frequency that varies in response to a touch capacitance generated in response to the first insulating member being touched, wherein the first sensor unit contacts the internal surface of the first insulating member, and does not contact the housing.

Abstract: A moving object sensing control circuit includes: a control circuit configured to determine, based on a mode signal, whether to operate in a sensing mode or a power saving mode, and control, in the power saving mode, a sensing operation in a sensing stage and a standby operation in a standby stage; an LC oscillation circuit configured to generate an oscillation signal based on an impedance value corresponding to relocation of a moving object, by performing the sensing operation or the standby operation in response to control of the control circuit; and a sensing circuit configured to obtain a period count value of the sensing oscillation signal using a reference oscillation signal and a main oscillation signal, and output an output signal having movement information of the moving object based on the period count value, by performing the sensing operation in response to the control of the control circuit.