Abstract: A low power sensing device includes a sensor including key sensors configured to generate sensing signals, respectively, a reference sensor configured to generate a reference sensing signal, a two-state clock generator configured to generate a first clock signal and a second clock signal having clock frequencies different from each other, and a controller. The controller is configured to receive the sensing signals and the reference sensing signal, control enable operations and disable operations of the sensor and the reference sensor based on a first operation mode and a second operation mode each repeatedly performed for a predetermined time, receive the first clock signal during the first operation mode, and receive the second clock signal during the second operation mode.

Abstract: A touch input sensing device configured to be added to an electronic device, the electronic device including a touch input unit, the touch input unit including a first touch member integrated with a housing. The touch input sensing device includes a resonant circuit configured to generate a resonance signal having a resonant frequency that varies based on a touch of the touch input unit, a digital frequency counter configured to count a reference frequency signal based on the resonance signal, or count the resonance signal based on the reference frequency signal, to generate a count value, and a touch detector configured to detect whether the touch of the touch input unit has occurred based on the count value generated by the digital frequency counter, and output a touch detection signal indicating whether the touch has occurred.

Abstract: A touch sensing device includes: an oscillation circuit including a sensing inductor disposed inside a touch member, a part of a cover of an electronic device, and generating an oscillation signal according to whether a touch has occurred through the touch member; a signal processor converting the oscillation signal into a digital sensing signal; a reference signal generator updating a reference signal based on the digital sensing signal; and a signal detector outputting a detection signal by detecting whether a touch has occurred through the touch member, using the reference signal and the digital sensing signal.

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 touch sensing device includes: a first signal conversion circuit configured to convert a first sensing signal from a first sensor unit into a first detection signal, the first detection signal being a digital signal; a signal operation circuit configured to operate the first detection signal and a high-frequency signal based on the first detection signal, to generate an operation output signal; and a touch detector configured to determine whether a touch manipulation has occurred, based on the operation output signal, to generate a touch detection signal having determination result information.

Abstract: A touch sensing device includes: an oscillation circuit including a sensing inductor disposed inside a touch member, a part of a cover of an electronic device, and generating an oscillation signal according to whether a touch has occurred through the touch member; a signal processor converting the oscillation signal into a digital sensing signal; a reference signal generator updating a reference signal based on the digital sensing signal; and a signal detector outputting a detection signal by detecting whether a touch has occurred through the touch member, using the reference signal and the digital sensing signal.

Abstract: A touch sensing device includes: a first signal conversion circuit configured to convert a first sensing signal from a first sensor unit into a first detection signal, the first detection signal being a digital signal; a signal operation circuit configured to operate the first detection signal and a high-frequency signal based on the first detection signal, to generate an operation output signal; and a touch detector configured to determine whether a touch manipulation has occurred, based on the operation output signal, to generate a touch detection signal having determination result information.

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 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 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 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 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 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 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 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.