Touch Panel Sensitivity Calibration for Finger and Glove Input
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing handheld terminals with electrostatic capacitive touch panels struggle to optimally adjust sensitivity settings for individual users based on their finger shape, thickness, and glove type, leading to inconsistent operability with bare fingers and gloves.
Innovation Solution
The handheld terminal includes a processor that detects capacitance changes from touch inputs with different media (fingers and gloves) and determines appropriate sensitivity thresholds for each, adjusting settings through a series of touch sensitivity proposing processes to recommend optimal sensitivity modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple sensitivity modes are prepared in advance for different media (finger, glove, stylus), then the device can be operated with various media, but the optimal settings cannot be determined for each individual user due to differences in finger shape, thickness, and glove types
Solution Approach 1:
The system automatically measures capacitance changes when the user touches the screen with different media and autonomously determines the optimal sensitivity mode without requiring user knowledge of technical parameters. The processor performs the measurement and determination processes automatically based on the capacitance data collected during a brief calibration period.
Solution Approach 2:
The system changes the sensitivity parameter (threshold value) based on the measured capacitance characteristics of each user's specific media. By adjusting the threshold value according to the actual capacitance change amounts observed during calibration, the system adapts the sensitivity settings to match each user's unique finger shape, thickness, and glove properties.
2Adaptability or versatility
If sensitivity threshold is increased to detect glove inputs, then glove operation becomes possible, but detection accuracy for bare finger inputs may be reduced
Solution Approach 1:
The threshold value is not fixed but dynamically adjusted based on the measured capacitance characteristics of each user's media. The system determines different threshold values for different media types (finger, glove, stylus) through automatic measurement, allowing the detection parameters to adapt to the specific properties of each medium being used.
Solution Approach 2:
The system performs a preliminary calibration process where it measures the capacitance changes caused by each type of media before actual use. Based on these preliminary measurements, the optimal threshold values are determined in advance for each user's specific media, ensuring both glove and finger detection accuracy from the start of actual operation.
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
This approach allows for quick and easy determination of suitable sensitivity settings for each user, improving operability with both bare fingers and gloves by setting the appropriate thresholds based on detected capacitance changes, enhancing user experience.
Implementation Method 1
changes in electrostatic capacitance between an operation input medium such as a finger and a conductive film are obtained
Data Source
AI summary
An information input device includes a touch panel and a processor. The processor receives a touch input to the touch panel with each of multiple media. The processor detects which of multiple thresholds is exceeded by a capacitance change of the touch panel in response to a touch input to the touch panel. The processor determines thresholds of capacitance change for respective media based on a detected result. The respective media are the multiple media. The thresholds of capacitance change are each used in judgement on whether or not a touch input to the touch panel with the each of the multiple media is made.