Capacitive Sensor Sheet for Writing Position Detection
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Solution Overview
Problem
Conventional electronic boards with touch panel displays are complex and costly due to their configuration, which complicates their design and increases production expenses.
Innovation Solution
An electronic board with a simple configuration featuring a sensor sheet with intersecting electrode wires and a chassis that fixes the sensor sheet, allowing for cost-effective detection of writing positions using a capacitance-type touch panel and electromagnetic induction circuit for pen identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If display-type electronic boards with touch panel displays are used, then writing information can be displayed and saved, but the configuration becomes complicated and cost increases
Solution Approach 1:
The patent extracts the display function from the electronic board by using an external projector to display images on a whiteboard surface. The electronic board itself is simplified to only contain sensor sheets for detecting writing positions and pen attributes, eliminating the need for complex display hardware while maintaining the core functionality of capturing and processing writing information
Solution Approach 2:
The patent uses a projector to create a visual copy of the writing board surface on a projection screen, allowing the writing area to be enlarged and displayed externally. This copying approach enables the electronic board to focus solely on sensing functions while the display function is performed by a separate projection system
2Adaptability or versatility
If display-type electronic boards with touch panel displays are used, then writing information can be displayed and saved, but production cost increases
Solution Approach 1:
The patent removes the expensive display panel components from the electronic board design. By extracting the display function to an external projection system, the electronic board can be manufactured at low cost using only simple sensor sheets, while still providing comprehensive writing detection and processing capabilities
Solution Approach 2:
The patent employs inexpensive sensor sheets that can be easily manufactured and replaced, eliminating the need for costly, complex display panels. The sensor sheets are designed to be affordable components that provide sufficient functionality for writing detection without requiring expensive materials or complex fabrication processes
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
The solution provides a cost-effective and simplified electronic board capable of detecting writing positions and identifying pen attributes, enabling efficient handwriting input while reducing complexity and production costs.
Implementation Method 1
capacitance-type touch panel
Implementation Method 2
electromagnetic induction circuit for pen identification
Data Source
AI summary
An electronic board includes: a sensor sheet including X parallel electrode wires and Y parallel electrode wires, and a chassis to which the sensor sheet is attached. A sensor substrate is connected to a lower end of the sensor sheet. A sensor substrate is connected to a right end of the sensor sheet. The sensor substrate is disposed on a back surface of the chassis with a portion close to the lower end of the sensor sheet being bent to cover a lower end of the chassis.