Micro-electrode Matrix Touch Panel Reduces Scanning Circuit Complexity
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Solution Overview
Problem
Large-sized projective capacitive touch panels face challenges in achieving high precision touch detection due to the need for numerous scanning lines and complex scanning circuits, which increase the number of controlled circuits and calculation burdens.
Innovation Solution
A touch panel with a micro-electrode matrix design that includes multiple scanning lines and micro-electrode chains between adjacent scanning lines, reducing the number of scanning lines required while maintaining high precision through the use of series resistances and guiding holes to enhance electromagnetic field sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of scanning lines is increased to improve touch detection precision, then measurement precision is improved, but device complexity increases due to more controlled circuits and scanning circuits
Solution Approach 1:
The patent divides the electrode structure into two functional layers: a first electrode layer with scanning lines and a second electrode layer with micro-electrode chains. This segmentation allows the system to reduce the number of scanning lines while maintaining detection precision through the collaborative work of both layers. The micro-electrode chains in the second layer compensate for the reduced scanning line density, resolving the contradiction between fewer scanning lines and high precision detection.
Solution Approach 2:
The patent introduces a second electrode layer with micro-electrode chains that operate in a different dimensional space than the traditional single-layer scanning lines. By adding this vertical dimension (z-axis layering) to the conventional x-y scanning line structure, the system achieves high precision touch detection with fewer scanning lines, as the micro-electrode chains provide additional detection dimensions and sensitivity.
2Measurement precision
If the number of scanning lines is increased to improve touch detection precision, then measurement precision is improved, but the number of controlled circuits increases
Solution Approach 1:
The patent merges the functions of multiple scanning lines into fewer scanning lines by incorporating micro-electrode chains that collectively perform the detection function. Instead of requiring numerous independent scanning lines each controlled by separate circuits, the combined system of reduced scanning lines and micro-electrode chains achieves the same or better precision with fewer controlled circuits, as the micro-electrode chains amplify the detection capability of each scanning line.
3Measurement precision
If the number of scanning lines is increased to improve touch detection precision, then measurement precision is improved, but calculation burden increases
Solution Approach 1:
The patent extracts the precision enhancement function from the scanning lines themselves and relocates it to the micro-electrode chains. By taking out the need for high-density scanning lines and implementing the precision function through the micro-electrode chains in the second layer, the system reduces both the number of scanning lines and the associated calculation burden, while maintaining high detection precision through the micro-electrode signal responses.
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 micro-electrode matrix design achieves improved touch resolution with fewer scanning lines, reducing the complexity of scanning circuits and enhancing detection precision and sensitivity, particularly in large-sized touch panels.
Implementation Method 1
a plurality of micro-electrode chains in first axis, formed on the first electrode layer, connected to place between the adjacent plurality of scanning lines in first axis; and a plurality of micro-electrode chains in second axis, formed on the second electrode layer, connected to place between the adjacent plurality of scanning lines in second axis
Data Source
AI summary
The disclosure is related to a touch panel with a micro-electrode matrix. It is formed by a plurality of x-axis scanning line, a plurality of y-axis scanning line and a micro-electrode matrix defined by each of the scanning lines, wherein the micro-electrode matrix is formed by the plurality of micro-electrode series in x-axis connected to the scanning line in x-axis and the plurality of micro-electrode series in y-axis connected to the scanning line in y-axis. Each of the micro-electrode chains is composed by the plurality of micro-electrode and series resistances.