Capacitive Stylus With Detachable Piezoelectric Eraser
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Solution Overview
Problem
Existing capacitive styluses do not provide an efficient method for users to erase handwriting on touch-sensitive devices, limiting convenience for certain operations.
Innovation Solution
A capacitive stylus with a detachable eraser that includes an erasing circuit and an emitting electrode, allowing the user to emit an erasing signal to the touch-sensitive device, enabling the erasure of handwriting by connecting the eraser to the stylus and compressing it against the screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a capacitive stylus is used for writing on touch-sensitive devices, then writing capability is improved, but erasing capability is lacking
Solution Approach 1:
The capacitive stylus is designed to perform multiple functions: writing on the touch-sensitive device and erasing handwriting. By integrating both writing tip and eraser components into a single stylus unit, the device achieves multi-functionality, allowing users to switch between writing and erasing modes without needing separate tools.
Solution Approach 2:
The stylus is divided into distinct functional segments: a writing tip for input and an eraser portion for deletion. The eraser can be detached or separated from the main stylus body, allowing independent use of each function. This segmentation enables the erasing capability while maintaining the writing function.
2Adaptability or versatility
If an eraser is integrated into the capacitive stylus, then erasing function is added, but device complexity increases
Solution Approach 1:
The control circuit serves dual purposes: it controls the writing function when the writing tip is used and controls the erasing function when the eraser is activated. This multi-functionality of the control circuit adds erasing capability without requiring a completely separate control system, thereby limiting the increase in device complexity.
Solution Approach 2:
The eraser circuit is integrated with the existing control circuit of the stylus, merging the erasing function into the current device architecture. By combining the eraser circuit with the control circuit rather than adding entirely separate components, the patent minimizes the increase in device complexity while still achieving the desired erasing function.
3Adaptability or versatility
If the eraser is detachable, then versatility is improved, but connection reliability may decrease
Solution Approach 1:
The eraser is designed as a detachable component that can be separated from the main stylus body. This segmentation allows the eraser to be used independently or attached to the stylus, providing versatility. The detachable design includes connection interfaces that maintain electrical contact when attached, enabling the eraser to function reliably when connected while preserving the ability to detach for storage or replacement.
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 convenient erasure of handwriting on touch-sensitive devices by distinguishing the erasing signal from writing signals, allowing precise removal of input within a predetermined area.
Implementation Method 1
a second end for being compressed so as to emit an erasing signal transmitted from the control circuit
Data Source
AI summary
A capacitive stylus, as an inputting device of a touch sensitive device, comprises a pen and a detachable eraser. The pen comprises a tip for writing on a screen of the touch sensitive device, a control circuit for emitting signals to the touch sensitive device, and a battery for providing electricity to the control circuit. The eraser includes an erasing circuit and a first end to combine with the pen, so that the erasing circuit electrically connects with the control circuit. The eraser includes a second end that is compressible, so that the control circuit can emit an erasing signal to the touch sensitive device.