Force operation sensing device with common noise cancellation
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsJoo Hyoung Lee, Joo Yul Ko
Life of this patent
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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.
Claims20
A force operation sensing device to be added to an electronic device, the electronic device comprising an input operation unit comprising a first operating member disposed in a housing, the force operation sensing device comprising:
- 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, which is inversely varied with the variation of the first variable resonant frequency, based on an interaction between the magnetic member and the second inductor element.
An apparatus comprising:
- an input operation unit;
- an oscillating circuit configured to generate at least a first oscillating signal comprising a first resonant frequency, and generate a second oscillating signal comprising a second resonant frequency based on an application of a force to an operating member, wherein the second resonant frequency is inversely varied with the variation of the first resonant frequency;
- and
- a force detection circuit configured to:
- convert the first oscillating signal into a first count value, and convert the second oscillating signal into a second count value;
- determine a frequency difference of the first oscillating signal and the second oscillating signal based on the first count value and the second count value;
- and
- detect the application of the force based on the determined frequency difference.
Dependencies are inferred from the claim text.