Background Signal Processing for Large Touch Panels
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Solution Overview
Problem
Large touch panels with high precision requirements face increased workloads in detecting and updating background noise, leading to reduced reading frequencies and potential signal distortion, as existing methods require frequent measurements from all sensors.
Innovation Solution
A background signal processing method that selectively measures conductive wire groups based on predetermined thresholds, reducing the number of measurements needed by using a first and second conductive wire number interval, and calculating speculative values for unmeasured wires to maintain signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the frequency of updating background noise is increased to ensure signal quality, then measurement precision is improved, but the workload increases and reading frequency decreases
Solution Approach 1:
The patent applies partial action by selectively measuring only certain conductive wire groups based on threshold comparisons rather than measuring all conductive wires uniformly. The system determines whether to perform full measurement or partial measurement based on whether background noise exceeds thresholds, thus performing only the necessary amount of measurement to maintain signal quality while reducing overall workload and maintaining reading frequency
2Measurement precision
If the number of sensors is increased to meet high precision requirements for large touch panels, then measurement precision is improved, but the workload for detecting and updating background noise increases
Solution Approach 1:
The patent segments the conductive wires into multiple groups and applies different measurement strategies to different segments. By dividing the conductive wires into first, second, and third groups with different measurement frequencies and thresholds, the system maintains high detection precision for all sensors while reducing the overall workload compared to uniformly measuring all sensors at maximum frequency
Solution Approach 2:
The patent applies local quality by assigning different measurement priorities and thresholds to different conductive wire groups. Certain groups are monitored more closely based on their specific characteristics and noise levels, while others receive less intensive monitoring, thus maintaining high precision where needed while reducing overall system workload
3Productivity
If the reading frequency is decreased to reduce workload, then productivity is maintained, but signal distortion occurs due to insufficient background noise updates
Solution Approach 1:
The patent implements dynamic measurement frequency adjustment based on real-time background noise levels. The system continuously monitors background noise and dynamically changes the measurement frequency for different conductive wire groups according to whether noise exceeds predetermined thresholds, thus maintaining signal reliability while optimizing system productivity through adaptive workload management
Data Source
AI summary
A background signal processing method and a background signal processing are provided. The background signal processing method includes measuring a first conductive wire group to determine whether a subsequent process is required according to a first background signal measurement value, and selecting a corresponding second conductive wire number interval according to first background signal measurement data if the subsequent process is required, or stopping measuring. A second background signal measurement value of a second conductive wire group in the conductive wires is detected according to the second conductive wire number interval. A background signal speculating value of a third conductive wire group, other than the first conductive wire group and the second conductive wire group, in the conductive wires is calculated according to the second background signal measurement value and the first background signal measurement value. Therefore, the updating steps for the background signals are greatly simplified, and the signals to be captured can have satisfied quality.