Touch-Sensing Structure Using Parallel Conducting Wires for High Resolution
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Solution Overview
Problem
Existing touch-sensing structures for touch panels, both passive and active, face limitations in sensing resolution, cost, and response time, with passive structures limited by channel density and active structures compromising aperture ratio and response speed.
Innovation Solution
A touch-sensing structure utilizing a conductor and parallel conducting wires, where each wire's resistance is lower than the line segments, allowing for high-resolution sensing without a high-channel touch signal processing circuit, enabling multi-touch sensing and faster response times without transistors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the distribution density of sensing units is increased to improve sensing resolution, then sensing resolution is improved, but the number of external wires and edge portion width must be increased
Solution Approach 1:
The patent combines multiple sensing unit functions into a single sensing unit by implementing a voltage divider circuit using conductive layers. Instead of using multiple separate sensing units, the invention uses a first conductive layer with first conducting wires and a second conductive layer with second conducting wires to create voltage dividers that can detect multiple touch positions, thereby reducing the number of external wires needed while maintaining high sensing resolution
Solution Approach 2:
The sensing unit is designed to perform multiple functions: it can detect single touch and multi-touch positions, determine touch coordinates, and control pixel aperture ratios simultaneously. The voltage divider circuit configuration allows the same sensing structure to handle various sensing scenarios without requiring additional external wires or complex circuitry
2Measurement precision
If the distribution density of sensing units is increased to improve sensing resolution, then sensing resolution is improved, but a more expensive touch signal processing circuit with more channels is required
Solution Approach 1:
The patent merges the functions of multiple sensing units into a single sensing unit by using voltage divider circuits formed by conductive layers. This approach allows the system to achieve high sensing resolution without requiring a touch signal processing circuit with multiple channels, as the voltage divider configuration can determine multiple touch positions using fewer signal processing resources
3Adaptability or versatility
If active touch-sensing structure is used to enable multi-touch sensing, then multi-touch capability is achieved, but aperture ratio is reduced and response speed is slowed
Solution Approach 1:
The patent extracts the transistor component from the sensing unit structure, eliminating the need for TFTs in the sensing units. By removing the transistor element, the invention achieves multi-touch sensing capability without the associated drawbacks of reduced aperture ratio and slowed response time, as the sensing is performed through voltage divider circuits formed by conductive layers rather than active transistor-based sensing units
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 solution achieves high sensing resolution with reduced peripheral wires, enabling multi-touch capabilities and maintaining aperture ratio, while improving response speed and reducing the need for expensive processing circuits.
Implementation Method 1
A resistance of each first conducting wire is smaller than that of each of the first line segments
Data Source
AI summary
In a touch-sensing structure for a touch panel and a touch-sensing method thereof, the touch-sensing structure includes a plurality of first conducting wires paralleled to each other and a first conductor. A terminal of each first conducting wire is electrically coupled to the first conductor, so as to divide the conductor into a plurality of first line segments. The resistance of each first conducting wire is smaller than that of each first line segment. Wherein, when the displaying area of the touch panel receives an external force, a first conducting wire corresponding to the position designated by the external force is electrically coupled to a reference potential.