Sensor Module Charge-Dispersing Film Position Detection
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Solution Overview
Problem
Conventional sensor modules struggle to precisely identify the position of input means, such as fingers or styluses, due to limited capacitance distribution and increased noise, which affects accuracy and response speed.
Innovation Solution
The sensor module incorporates a charge-dispersing film with high electrical resistance over the sensor electrodes, forming a capacitance with the capacitance-forming layer and sensor electrodes, allowing for improved charge distribution and precise position identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional sensor modules are used without charge-dispersing film, then the structure is simpler, but the accuracy of input position detection is insufficient due to limited capacitance distribution and increased noise
Solution Approach 1:
A charge-dispersing film is introduced as an intermediary layer between the sensor electrodes and the input means. This film mediates the charge distribution by dispersing accumulated charges across its surface, thereby improving the capacitance distribution and signal quality without requiring fundamental changes to the sensor electrode structure.
Solution Approach 2:
The charge-dispersing film changes the electrical parameters of the sensor system by providing a controlled dielectric layer with specific electrical resistance characteristics. This modifies the capacitance distribution and noise characteristics, enabling more accurate position detection while maintaining structural simplicity.
2Measurement precision
If charge-dispersing film is added to improve charge distribution, then the accuracy is enhanced, but the device complexity increases
Solution Approach 1:
The charge-dispersing film is implemented as a thin flexible film layer that can be easily integrated into the existing sensor module structure. This thin-film approach provides the necessary charge dispersion function while minimizing the increase in overall device complexity and maintaining compatibility with standard manufacturing processes.
3Measurement precision
If multiple charge-dispersing films are used to improve charge distribution, then the sensor value distribution is expanded, but the manufacturing complexity increases
Solution Approach 1:
The charge-dispersing function is segmented into multiple discrete film layers, each with specific electrical characteristics. This segmentation allows for optimized charge distribution across different regions of the sensor, improving overall measurement precision while enabling modular manufacturing approaches that can simplify production.
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 configuration enhances the accuracy of input position detection by expanding sensor value distribution, enabling precise and accurate identification without increasing power consumption or decreasing response speed.
Implementation Method 1
forming a capacitance with the capacitance-forming layer and sensor electrodes
Data Source
AI summary
Disclosed is a sensor module including a first substrate having an insulating property, a plurality of sensor electrodes over the first substrate, a second substrate having an insulating property over the plurality of sensor electrodes, at least one charge-dispersing film over the second substrate, and a third substrate over the at least one charge-dispersing film. The at least one charge-dispersing film may consist of one charge-dispersing film overlapping all of the plurality of sensor electrodes.