Touch Control Circuit Weighting for Stable Hover Report Detection
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Solution Overview
Problem
Existing touch detection technologies face instability in generating reports due to variations in sensing values affected by factors like finger distance, contact area, and touch point position, leading to inconsistent report generation at the same vertical height and horizontal position.
Innovation Solution
A touch detection method that involves determining a plurality of reference sensor pads based on a touch point position, assigning weights to these pads, evaluating a peak value, and using thresholds to stabilize report generation by accurately estimating hovering height.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional touch detection methods are used to determine report generation based on sensing values, then the system can detect touch events, but the report generation becomes unstable due to variations in finger distance, contact area, and touch point position
Solution Approach 1:
The patent applies local quality by determining a weight for each reference sensor pad based on its distance to the touch point. Sensor pads closer to the touch point are assigned higher weights, while those farther away receive lower weights. This localized weighting approach allows the system to account for position variations and improve report generation stability without requiring uniform sensing value consistency across all sensor pads.
Solution Approach 2:
The patent changes the parameter of sensing value evaluation by introducing a weighted sum calculation instead of using raw sensing values directly. The weighted sum incorporates both the sensing values and their corresponding weights, transforming the evaluation parameter to better reflect the actual touch characteristics and reduce the impact of positional variations on report generation.
2Area of stationary object
If the system uses all sensor pads for touch detection, then comprehensive coverage is achieved, but the complexity of determining hover height and generating reports increases
Solution Approach 1:
The patent segments the sensor pad array by identifying a specific number of reference sensor pads around the touch point based on distance criteria. Instead of processing all sensor pads uniformly, the system divides them into reference pads (those within a certain distance threshold) and non-reference pads. This segmentation reduces the computational complexity while maintaining comprehensive coverage of the touch area.
Solution Approach 2:
The patent applies partial action by selectively using only the necessary reference sensor pads for hover height determination and report generation, rather than processing all sensor pads. This partial approach focuses computational resources on the most relevant sensors, reducing overall system complexity while maintaining detection accuracy.
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 method improves report stability by narrowing the tolerant range for consistent report generation, ensuring reports are generated only when the finger is close to the touch panel, reducing inconsistencies caused by horizontal position variations.
Implementation Method 1
detecting changes in the sensing value of the sensor pads on the touch panel
Data Source
AI summary
A touch detection method for generating a report includes obtaining a position of a touch point; determining a plurality of reference sensor pads according to the position of the touch point; determining a weight for each of the plurality of reference sensor pads according to the position of the touch point; evaluating a first evaluated peak value of the touch point based on sensing values of the plurality of reference sensor pads and the corresponding weights; and determining whether to generate the report for the touch point according to the first evaluated peak value and a first threshold.