Electronic Board Eraser With Segmented Electrodes For Large Area Wiping
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Solution Overview
Problem
Electronic whiteboards lack an efficient method for erasing large areas, as traditional stylus eraser modes are cumbersome and ineffective compared to traditional erasers.
Innovation Solution
An electronic board eraser with a waterproof case and wiping surface, featuring elastic conductive eraser electrodes and a processor that emits electrical signals in response to a beacon signal from a touch panel, allowing for variable erasing areas and power-saving modes, mimicking the experience of a traditional eraser.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If a stylus with eraser mode is used on electronic whiteboard, then the electronic whiteboard can sense tip position and display handwriting, but the tip area of stylus is very small and unable to erase a large area of mark
Solution Approach 1:
The eraser is segmented into multiple independent eraser electrodes (at least three) arranged in specific patterns. Each electrode can be independently controlled to emit erasing signals, allowing different regions of the eraser surface to be activated based on the marking area size and position, thereby enabling efficient erasure of large areas while maintaining ease of operation
Solution Approach 2:
The invention transitions from a single-point eraser tip (0D/1D) to a two-dimensional eraser surface with multiple electrodes. This dimensional expansion allows the eraser to cover large areas of the electronic whiteboard, solving the problem of small erasing area while maintaining user-friendly operation through intuitive contact-based control
2Area of moving object
If multiple eraser electrodes are used to increase erasing area, then large area erasure is enabled, but the device complexity increases
Solution Approach 1:
Multiple eraser electrodes serve universal functions: they can be individually activated or combined to erase different sized areas, detect contact pressure distribution, and provide tactile feedback. This multi-functionality reduces the need for additional specialized components, managing device complexity while enabling large area erasure
Solution Approach 2:
The eraser electrodes are pre-configured in specific geometric patterns (triangular, rectangular, or circular arrangements) with predetermined spacing and activation sequences. This preliminary arrangement simplifies the control logic during actual erasing operations, as the system only needs to activate pre-positioned electrodes based on simple contact detection, rather than dynamically calculating electrode positions
3Reliability
If the processor continuously senses beacon signal and emits electrical signals, then real-time erasing control is achieved, but power consumption increases
Solution Approach 1:
The processor implements periodic sensing of beacon signals rather than continuous sensing, activating the eraser electrodes in rhythmic intervals synchronized with the beacon signal transmission. This periodic operation maintains real-time erasing control reliability while significantly reducing power consumption compared to continuous operation
Solution Approach 2:
The eraser system uses the beacon signal from the electronic whiteboard as its primary power and synchronization source. The eraser electrodes are activated only in response to detected beacon signals, allowing the system to harvest energy and control timing from the existing whiteboard infrastructure, thereby minimizing additional power requirements while maintaining responsive erasing control
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 easy and efficient erasure of large areas on electronic whiteboards, with the ability to detect and adjust erasing pressure and area, matching the experience of using a traditional eraser while maintaining power efficiency.
Implementation Method 1
having the sensing circuit sense a beacon signal emitted from a touch panel
Implementation Method 2
having the driving circuit provide electrical signals to the at least three eraser electrodes
Data Source
AI summary
The present invention provides a touch sensitive processing apparatus for detecting an electronic board eraser. The touch sensitive processing apparatus connects to a touch panel. The touch panel includes parallel first electrodes and parallel second electrodes, each of the first electrodes intersects with the second electrodes to form multiple intersection areas. The touch sensitive processing apparatus includes: a driving circuit connecting to the first electrodes; a sensing circuit connecting to the first electrodes and the second electrodes; and a processor connecting to the driving circuit and the sensing circuit. Wherein the processor is configured to execute a program module for realizing the following steps: having the driving circuit emit a beacon signal via the first electrodes simultaneously; and having the sensing circuit detect electrical signal emitted from at least three eraser electrodes of the electronic board eraser via the first and the second electrodes after a time period since the beacon signal is emitted.