Capacitive Touch Panel Resistor Layout for False Touch Suppression
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Solution Overview
Problem
Existing touch panel devices face challenges in reducing costs associated with suppressing false detection of touch inputs, particularly due to the lack of resistors between electrodes and switches, leading to increased wiring and resistor requirements on both substrates.
Innovation Solution
Incorporating resistors on the conductive film with electrodes, forming resistance regions and series paths to differentiate potentials between touch input regions and switches, allowing for accurate detection without additional wiring on both substrates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If resistors are not provided between electrodes and switches, then wiring and resistor requirements are reduced, but false detection of touch inputs increases
Solution Approach 1:
A resistor is introduced as an intermediary component between the electrode and the switch on the conductive film. This resistor creates a potential difference that serves as a mediator to distinguish between touch inputs on the touch input region versus switch activations, thereby reducing false detection while maintaining simplified wiring architecture
Solution Approach 2:
The resistor is selectively positioned only in specific regions where switches are located on the conductive film, rather than uniformly across the entire film. This local placement creates differentiated electrical characteristics only where needed, enabling switch detection without affecting the overall touch input functionality or requiring additional wiring throughout the panel
2Measurement precision
If additional wiring and resistors are provided on both substrates to suppress false detection, then detection accuracy improves, but production costs increase
Solution Approach 1:
The resistor is integrated directly into the conductive film structure during the same manufacturing process, merging the resistor fabrication with the conductive film deposition. This eliminates the need for separate resistor components and additional wiring layers on both substrates, reducing production steps and costs while maintaining detection accuracy
Solution Approach 2:
The conductive film itself serves dual purposes: it provides the electrical connection pathway and simultaneously hosts the resistor component needed for false detection suppression. This self-service approach eliminates the need for separate dedicated resistor components and complex multi-substrate wiring arrangements, reducing manufacturing complexity and cost
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 effectively reduces false detection errors and lowers production costs by integrating resistive components directly on the conductive film, enhancing detection accuracy and panel efficiency.
Implementation Method 1
a first conductive film having a first region and a second region, at least a part of the first conductive film between the first region and the second region being removed; a second conductive film laminated on the first conductive film across a gap
Implementation Method 2
a first resistor provided on the first conductive film in the second region and having a pair of electrodes, the pair of electrodes facing each other across a first resistance region in the first conductive film
Data Source
AI summary
A touch panel device includes a first conductive film having first and second regions, at least a part of the first conductive film between the first and the second regions being removed, a second conductive film laminated on the first conductive film across a gap, first and second terminals that output signals, a first electrode electrically connected to the first terminal, a second electrode facing the first electrode across the first region, a first resistor provided on the first conductive film in the second region and having a pair of electrodes, the pair of electrodes facing each other across a first resistance region in the first conductive film, one of the electrodes being electrically connected to the second electrode, the other of the electrodes being electrically connected to the second terminal, and a first switch electrically connecting the first conductive film to the second conductive film, in the second region.