Sound Wave Keyboard Input System for Portable Terminals

Solution Overview

Problem

Portable terminal devices face challenges in information input due to limitations in recognition rates and potential human body harm from electromagnetic waves associated with wireless keyboards, and they require power for operation.

Innovation Solution

An information input system and method using sound waves, where a keyboard generates unique sound waves upon key strokes, allowing for key value detection and input to a device without the need for power or wired/wireless connections, using a combination of acoustic and electronic sound output units.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a wireless keyboard using Bluetooth is used to input information to a portable terminal, then information input capability is improved, but recognition rate decreases due to crosstalk and electromagnetic waves cause harm to the human body

Engineering Contradiction:

Improveinformation input capabilityVSAvoidrecognition rate

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent replaces the electromagnetic wave-based wireless communication system with an acoustic sound wave-based system. The keyboard generates unique sound waves when keys are pressed, and these sound waves are detected by a microphone in the portable terminal to input information. This substitution of the transmission medium from electromagnetic waves to sound waves eliminates crosstalk interference and electromagnetic radiation harm while maintaining wireless information input capability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Ease of operation

If a wireless keyboard using Bluetooth is used to input information to a portable terminal, then information input capability is improved, but electromagnetic waves cause harm to the human body

Engineering Contradiction:

Improveinformation input capabilityVSAvoidelectromagnetic radiation harm

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the electromagnetic wave-based wireless communication system with an acoustic sound wave-based system. The keyboard generates unique sound waves when keys are pressed, and these sound waves are detected by a microphone in the portable terminal to input information. This substitution of the transmission medium from electromagnetic waves to sound waves eliminates crosstalk interference and electromagnetic radiation harm while maintaining wireless information input capability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Ease of operation

If a conventional keyboard is used for information input, then information input is possible, but the device requires power supply to operate

Engineering Contradiction:

Improveinformation input functionalityVSAvoidpower consumption

Core Design Contradiction:

Ease of operationVSUse of energy by moving object

Solution Approach 1:

The keyboard in the patent is designed as a passive device that does not require power supply. It generates sound waves mechanically when keys are pressed, and these sound waves are detected by the portable terminal's microphone. The system uses the portable terminal's existing power and processing capabilities, while the keyboard itself remains power-free, eliminating the need for batteries or power connections in the keyboard.

Inventive Principle:

Principle #25Self-service

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enables efficient information input without the limitations of wireless keyboards, such as crosstalk and electromagnetic hazards, and allows input without power supply, using sound waves as a medium for information transmission.

Implementation Method 1

a resonance part outputting an acoustic sound wave of a unique frequency corresponding to the stroked input key when the resonance part comes into contact with one side of the stroked input key

Methodology Applied

Scientific EffectResonance: Resonance

Data Source

PatentUS11086409B2System, device, and method for inputting information on basis of sound wave

Publication Date: 2021.08.10 CAFE24 CORP

AI summary

Disclosed herein is a system, device, and method for inputting information on the basis of a sound wave. The system for inputting information on the basis of a sound wave may comprise: a keyboard including a plurality of input keys, each of which generates a unique key sound wave as the input key is struck by a user; and an information input unit for acquiring at least one key sound wave generated as at least one of the input keys on the keyboard is struck, detecting at least one key value corresponding to the acquired at least one key sound wave, and inputting the detected key value to a device.