Touch input sensing apparatus for housing of electric device

Abstract

The present invention provides a touch input sensing apparatus for a housing of electric device. The 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 resonancesignal 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, orcount 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.

Description

[0001] This application claims Korean Patent Application No. 10-2019-0064765 filed with the Korean Intellectual Property Office on May 31, 2019 and Korean Patent Application No. 10-2019-0106882 filed with the Korean Intellectual Property Office on August 29, 2019 Benefit of Priority to Patent Application, the entire disclosure of said Korean Patent Application is hereby incorporated by reference for all purposes. technical field [0002] The present application relates to a touch input sensing device for a housing of an electronic device. Background technique [0003] In general, it is expected that a wearable device can be thin and light and have a simple and clean design. To achieve this, existing mechanical switches in wearable devices have been replaced with non-mechanical switches implemented using dust- and water-resistant technologies, enabling the production of wearable devices with seamless casings. [0004] For the purpose of realizing and developing non-mechanica...

AI Technical Summary

Problems solved by technology

[0005] In the case of existing mechanical switches, large size and internal space are required to realize the switch function, and due to the outwardly protruding shape of the switch, the structure of the switch is not integrated with the outer casing, and other problems, the design may be somewhat inappropriate. Uncluttered and may require a lot of space

[0006] Also, there is a risk of electric shock due to direct contact with mechanical switches that are electrically connected

In addition, the structure of the mechanical switch makes it difficult to achieve dustproof and waterproof

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