Touch Input System Pen State Detection and Notification
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Solution Overview
Problem
Existing touch input systems for touch screens with electronic pens struggle to accurately determine the type and state of the input tool, leading to potential incorrect input when the pen is faulty or improperly used, as they cannot differentiate between pens or notify users of issues such as insufficient ink or missing identifiers.
Innovation Solution
A touch input system that includes a coordinate detector, an input-tool identifier, and state determiners to detect position coordinates and attribute identification, along with a notifier to inform users of the pen's state, using a combination of capacitive touch panels and electromagnetic induction circuits to differentiate between pens and detect resonance frequencies for attribute identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If electromagnetic induction method is used to detect pen position, then position detection capability is improved, but ability to determine input tool type and state is worsened
Solution Approach 1:
The patent segments the detection functions into two independent parts: position detection using electromagnetic induction and attribute detection using resonance frequency measurement. This allows each function to be optimized separately while working together in the integrated system.
Solution Approach 2:
The patent introduces an identifier circuit as an intermediary component that carries attribute information about the input tool. This identifier circuit responds to electromagnetic signals from the board, enabling the board to extract both position and attribute information through a unified detection mechanism.
2Ease of operation
If basic position detection is implemented, then coordinate input capability is improved, but tool state monitoring and user notification are worsened
Solution Approach 1:
The patent performs preliminary detection of the input tool's attribute information through resonance frequency measurement before the actual input operation. This allows the system to verify tool functionality and notify users of potential issues before incorrect input occurs.
Solution Approach 2:
The patent implements a feedback mechanism where the board measures the resonance frequency of the identifier circuit in the input tool and uses this information to determine tool state. The system provides feedback to the user about tool status, enabling proactive monitoring and prevention of input errors.
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 accurate determination of the input tool's type and state, preventing incorrect input by notifying users of pen issues like insufficient ink or missing identifiers, ensuring reliable and correct data generation.
Implementation Method 1
a coordinate detector that detects a position coordinate of a touch with the input tool on the input screen
Implementation Method 2
an input-tool identifying part that identifies an attribute regarding the input tool
Data Source
AI summary
A touch input system includes: a coordinate detector that detects a position coordinate of a touch with a pen on a board; a pen identifying part that identifies an attribute regarding the pen; a first pen-state determiner that determines whether the pen is in a state where the coordinate detector is able to detect the position coordinate; a second pen-state determiner that determines whether the pen is in a state where the pen identifying part is able to identify the attribute; and a notifier that notifies predetermined information based on determination results of the first pen-state determiner and the second pen-state determiner.