Touch Pen Pressure Detection for First Touch Sound Reproduction
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Solution Overview
Problem
Conventional writing input systems on touch panels fail to accurately reproduce the first touch sound when an electronic pen contacts the input surface, leading to a sense of incongruity and reduced reproducibility of the writing sound.
Innovation Solution
A writing input device equipped with a writing pressure detector, sound producer, and sound outputter that generates and outputs a pseudo sound based on the detected writing pressure, allowing for the reproduction of the first touch sound and friction sound during writing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional pseudo sound generation based on pen speed is used, then friction sound during writing can be reproduced, but the first touch sound cannot be reproduced
Solution Approach 1:
The writing sound is segmented into two distinct components: first touch sound (impact sound) and friction sound. The patent applies different sound generation methods for each segment - impact sound is generated based on pressure detection at contact moment, while friction sound is generated based on pen movement speed. This segmentation allows both sound types to be reproduced accurately without interfering with each other.
Solution Approach 2:
The patent dynamically switches between different sound generation modes based on the writing state. When the pen first contacts the input surface, the system detects the impact and generates first touch sound. During continuous writing, the system generates friction sound based on pen speed. This dynamic adaptation ensures appropriate sound reproduction for each writing phase.
2Ease of operation
If only friction sound is generated based on pen speed, then writing movement sound is reproduced, but the authenticity of writing experience is reduced
Solution Approach 1:
The patent merges two sound generation approaches - impact sound based on pressure detection and friction sound based on speed detection - into a unified sound output system. Both sound components are combined and output simultaneously or sequentially depending on the writing phase, creating a comprehensive and authentic writing sound experience that closely mimics traditional chalk-on-blackboard writing.
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
Enhances the reproducibility of the writing sound by accurately simulating the first touch and friction sounds, providing a more authentic experience by adjusting sound volume and quality based on writing pressure and speed.
Implementation Method 1
a writing pressure detector that detects a writing pressure generated by a tip end of the writing input device contacting a contact target
Implementation Method 2
a sound producer that produces a pseudo sound, based on the writing pressure detected by the writing pressure detector
Data Source
AI summary
The present invention provides a touch pen including a writing pressure detector that detects a writing pressure generated by a nib contacting an input surface of a touch panel, a sound producer that produces a pseudo sound of a first touch, based on the writing pressure detected by the writing pressure detector, and a sound outputter that outputs the pseudo sound produced by the sound producer.