Multi-Direction Capacitive Touch Signal Trend Analysis
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Solution Overview
Problem
Capacitive touch devices can only detect a single object and are unable to effectively detect multiple objects simultaneously, limiting their functionality.
Innovation Solution
A method and system that receive induction signals along multiple directions, compare these signals with a reference to detect upward and downward trends, and determine the number of objects based on the trends, allowing for the detection of multiple objects by analyzing the number of trends in each signal direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the traditional capacitive touch detection method is used, then the device structure is simple and easy to manufacture, but it can only detect a single object and cannot detect multiple objects simultaneously
Solution Approach 1:
The patent divides the touch detection into multiple independent detection dimensions by using multiple induction signal directions (first direction and second direction perpendicular to each other). Each direction provides independent detection data, allowing the system to segment the detection task and identify multiple objects based on the combined information from different dimensions.
Solution Approach 2:
The patent introduces a new detection dimension by receiving induction signals along multiple directions (first direction and second direction perpendicular to each other). This dimensional expansion allows the system to distinguish between single and multiple objects by analyzing signal patterns across different dimensions, transforming a one-dimensional detection approach into a multi-dimensional one.
2Measurement precision
If multiple induction signal directions are used to detect multiple objects, then the object detection capability is improved, but the signal processing complexity increases
Solution Approach 1:
The patent performs preliminary signal processing by receiving induction signals along multiple directions before final object determination. The system pre-processes the signals from the first and second directions separately, identifying trends and patterns in advance, which simplifies the subsequent object counting process and improves detection accuracy.
Solution Approach 2:
The patent uses feedback mechanisms by comparing induction signals from different directions and using the results to determine the number of objects. The system continuously monitors signal trends from both directions and adjusts its detection logic based on the combined feedback, ensuring accurate object number identification while managing processing complexity.
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 of multiple objects on a touch device, improving its operational capability and user experience by accurately determining the number of touch points based on signal trends and thresholds.
Implementation Method 1
capacitive touch devices can stand wear and tear, enjoy long life and have advantages in system function and in reducing light losses
Implementation Method 2
use a controller chip to sense changes in capacitance in the capacitors of the touch panel and determine the position and the gesture of the touch object
Data Source
AI summary
A method for detecting one or more objects is disclosed. In one embodiment, the method comprises the steps of: receiving one or more induction signals caused by at least one object along one or more directions; comparing each received induction signal with a reference to detect at least one upward trend and/or at least one downward trend in the induction signal; and determining the number of objects based on the number of upward trend and/or downward trend in each received induction signal. A device for detecting one or more objects on a touch device is also disclosed.