Digital Capacitive Touch Panel Bridge Electrode Segmentation
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Solution Overview
Problem
Large-scale digital capacitive touch panels face challenges in accurately detecting touch coordinates due to the limited number of signal-transmitting wire electrodes, which restricts their size and sensitivity, making it difficult to achieve high-sensitivity detection without increasing the number of electrodes.
Innovation Solution
A high-sensitivity digital capacitive touch panel device is designed with a substrate having a display area, an inactive area with signal-transmitting wire electrodes, two pairs of main position sensor electrodes along the X and Y axes, bridge electrodes connecting them, and sub position sensor electrodes connected to the main electrodes in a different direction, allowing precise touch point detection without increasing the number of signal-transmitting wire electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of signal-transmitting wire electrodes is increased to improve touch coordinate detection accuracy on large-scale panels, then measurement precision is improved, but device complexity and weight increase
Solution Approach 1:
The sensor electrode is divided into multiple sub-electrodes (first sub-electrode and second sub-electrode) that are electrically connected through bridge electrodes. This segmentation allows the system to maintain detection accuracy by creating multiple capacitive coupling paths while avoiding the need for a single large complex electrode structure.
Solution Approach 2:
The patent introduces sub-electrodes in addition to the main sensor electrodes, creating a multi-dimensional electrode configuration. By adding this dimensional layer of sub-electrodes connected through bridge electrodes, the system achieves improved measurement precision without proportionally increasing overall device complexity.
2Measurement precision
If the number of signal-transmitting wire electrodes is increased to improve touch coordinate detection accuracy, then measurement precision is improved, but weight and thickness increase
Solution Approach 1:
The sensor electrode is divided into multiple sub-electrodes (first sub-electrode and second sub-electrode) that are electrically connected through bridge electrodes. This segmentation allows the system to maintain detection accuracy by creating multiple capacitive coupling paths while avoiding the need for a single large complex electrode structure.
Solution Approach 2:
Multiple sub-electrodes are electrically connected through bridge electrodes to function as a unified sensing system. This merging approach allows the system to achieve the detection precision of many electrodes while using fewer individual electrode structures, thereby reducing overall weight.
3Measurement precision
If the number of signal-transmitting wire electrodes is increased to improve touch coordinate detection accuracy, then measurement precision is improved, but the inactive area increases
Solution Approach 1:
The sensor electrode is divided into multiple sub-electrodes (first sub-electrode and second sub-electrode) that are electrically connected through bridge electrodes. This segmentation allows the system to maintain detection accuracy by creating multiple capacitive coupling paths while avoiding the need for a single large complex electrode structure.
Solution Approach 2:
The patent introduces sub-electrodes in addition to the main sensor electrodes, creating a multi-dimensional electrode configuration. By adding this dimensional layer of sub-electrodes connected through bridge electrodes, the system achieves improved measurement precision without proportionally increasing overall device complexity.
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 enables precise detection of touch coordinates on large-scale touch panels, reducing weight, thickness, and size while maintaining high sensitivity, allowing for accurate minute movement recognition and multi-touch functionality.
Implementation Method 1
a plurality of bridge electrodes disposed between the main position sensor electrodes such that the two pairs of the main position sensor electrodes can be electrically connected to each other in each direction therethrough
Implementation Method 2
The capacitive touch panel senses touch based upon changes in capacitance occurring when a finger contacts a sensor electrode
Data Source
AI summary
A capacitive touch panel device of a high-sensitivity digital system. The capacitive touch panel device includes a substrate, a display area formed at the center of the substrate, a non-active area formed along the outer periphery of the display area, extending to the end of the substrate, and mounted with a plurality of signal transmitting wire electrodes, two pairs of position sensing main sensor electrodes arranged in a two-dimensional fashion in the display area to display coordinates, a plurality of bridge electrodes interposed between the two pairs of position-sensing main sensor electrodes, an external terminal unit electrically connected to the ends of the plurality of signal transmitting wire electrodes, and a position sensing sub electrode electrically connected to each of the two pairs of position-sensing main sensor electrodes, and arranged in the direction different from the direction wherein the bridge electrodes are connected.