Touch Sensor System Hand-Placing Region Signal Replacement
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Solution Overview
Problem
Conventional touch sensor systems require specialized application software on the host device to display and move the hand-placing region, which complicates the detection of stylus inputs and can lead to wrong recognition.
Innovation Solution
A touch sensor system that detects the hand-placing region based on capacitance signal strengths, replaces these signals with nil values to indicate no touch input, and outputs stylus input coordinates using the replaced signals and signals from outside the hand-placing region, allowing normal application software to operate without recognizing hand-placing signals as stylus inputs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If specialized application software is mounted on the host device to specify and move the hand-placing region, then the hand-placing region can be automatically displayed and adjusted, but the device complexity increases and normal application software cannot properly detect stylus inputs
Solution Approach 1:
The patent extracts the hand-placing region specification function from the application software layer and implements it in the touch sensor system hardware (capacitance distribution detecting circuit). This separates the automatic region setting function from the host device software, allowing normal application software to operate without interference while maintaining automatic hand-placing region display and adjustment capabilities
Solution Approach 2:
The patent introduces a signal replacement mechanism as an intermediary between the touch sensor system and the host device. The capacitance distribution detecting circuit replaces capacitance signals within the hand-placing region with nil values before transmitting to the host device, acting as a mediator that prevents hand-placing signals from being misinterpreted as stylus inputs while allowing the host device to operate with standard software
2Adaptability or versatility
If the hand-placing region is specified by application software on the host device, then the hand-placing region can be adjusted, but wrong recognition of stylus inputs occurs
Solution Approach 1:
The patent extracts capacitance signals corresponding to capacitors within the hand-placing region and replaces them with nil values in the capacitance distribution detecting circuit before transmission to the host device. This extraction and replacement of hand-placing region signals prevents them from being misrecognized as stylus inputs, thereby improving input recognition accuracy while maintaining hand-placing region adjustability
Solution Approach 2:
The patent applies preliminary anti-action by preemptively replacing capacitance signals within the hand-placing region with nil values before these signals reach the host device and application software. This preliminary intervention prevents the potential harmful effect of wrong recognition (hand-placing signals being misinterpreted as stylus inputs) before it can occur, ensuring reliable input detection
3Reliability
If capacitance signals within the hand-placing region are replaced with nil values, then wrong recognition of stylus inputs is prevented, but the system must process and replace signals
Solution Approach 1:
The patent merges the signal replacement function with the existing capacitance distribution detection functionality. The capacitance distribution detecting circuit performs both capacitance measurement and signal replacement in an integrated manner, replacing hand-placing region signals with nil values during the normal detection process. This combining of functions achieves reliable input recognition without requiring separate complex signal processing subsystems
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 the detection and recognition of stylus inputs without the need for specialized software, effectively removing hand-placing region signals and preventing wrong recognition, thus simplifying the system configuration and improving input accuracy.
Implementation Method 1
a touch sensor system which detects an input with a stylus to a touch panel including a plurality of capacitors provided in a matrix manner
Data Source
AI summary
The present invention provides a touch sensor system which is capable of removing a hand-placing signal while mounting normal application software on a host device. A touch sensor system (1) includes a hand-placing removing process section (2) which detects a hand-placing region on a basis of strengths of capacitance signals, each strength being indicative of a change in capacitance and which replaces values of capacitance signals corresponding to respective capacitors provided in the detected hand-placing region with a nil value indicative of a state where not touch input is made.