Sensor Electrode Wiring Layout for Uniform Non-Contact Detection
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Solution Overview
Problem
Existing touch sensors require direct contact for input, limiting the functionality of non-contact type sensors in detecting input means without physical contact.
Innovation Solution
A sensor module with a sensor substrate and electrodes arranged in rows and columns, featuring resistance-adjusting portions and cutoffs in sensor wirings and electrodes to maintain consistent detection sensitivity and accuracy for non-contact input detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If sensor wirings are extended to cover larger sensor regions with multiple rows and columns, then the sensor coverage area increases, but the wiring resistance varies significantly across different columns, causing detection sensitivity inconsistency
Solution Approach 1:
The patent applies local quality by introducing resistance-adjusting portions at specific locations in the sensor wirings. These portions have different resistance values tailored to the specific column's needs, creating non-uniform resistance distribution that compensates for the varying lengths of sensor wirings across different columns, thereby equalizing detection sensitivity throughout the entire sensor array
Solution Approach 2:
The patent changes the resistance parameter of sensor wirings by incorporating resistance-adjusting portions with specifically designed resistance values. This parameter modification allows each column's total wiring resistance to be adjusted to a standardized value, compensating for the natural variation in wiring length and ensuring uniform detection sensitivity across all sensor electrodes
2Measurement precision
If sensor electrodes are arranged in a dense grid pattern to improve resolution, then detection precision increases, but the complexity of wiring connections and resistance matching increases
Solution Approach 1:
The patent segments the sensor wiring system into multiple independent columns, each with its own resistance-adjusting portion. This segmentation allows for independent resistance optimization of each column without affecting others, simplifying the overall design and manufacturing process while maintaining high detection precision across the entire sensor grid
Solution Approach 2:
The patent modifies the resistance parameter of individual wiring segments through the resistance-adjusting portions, enabling precise control of electrical characteristics in each column. This parameter adjustment simplifies the wiring configuration by providing a straightforward method to achieve uniform sensitivity across complex multi-row, multi-column sensor arrangements
3Adaptability or versatility
If the sensor wiring length is increased to cover more sensor electrodes, then the number of detectable input positions increases, but the wiring resistance increases, reducing signal quality
Solution Approach 1:
The patent changes the resistance parameter of sensor wirings by adding resistance-adjusting portions with specifically calculated resistance values. This allows the total resistance of each wiring to be standardized despite varying lengths, maintaining signal quality across all sensor electrodes regardless of their position in the expanded sensor array
Data Source
AI summary
The sensor module includes a sensor substrate, a plurality of sensor electrodes, and a plurality of sensor wirings. The sensor substrate has a sensor region and a sensor frame region surrounding the sensor region. The plurality of sensor electrodes is located over the sensor region and is arranged in a plurality of rows and a plurality of columns. The plurality of sensor wirings respectively corresponds to the plurality of sensor electrodes, is electrically connected to the corresponding sensor electrodes, respectively, and each has a terminal over the sensor frame region. The plurality of terminals is arranged along a side of the sensor region. At least one of the sensor wirings connected to the sensor electrode includes a resistance-adjusting portion in each column. A resistance of the resistance-adjusting portion is higher than a resistance of another portion in the sensor wiring including the resistance-adjusting portion.