Touch Panel Wire Arrangement Circuit Reduces Resistance Non-Uniformity
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Solution Overview
Problem
The existing touch panel wire arrangement circuits suffer from non-uniform resistance distribution, leading to flicker and regional mura (uneven brightness) issues due to varying resistance values across different ITO regions, which affects the display quality.
Innovation Solution
The introduction of a switch set comprising multiple switches with strategically connected metal wires and voltage signals to create a parallel resistance path for IC signal transmission across ITO regions, reducing the resistance difference and enhancing uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the V-com electrode is used to implement space region division of TP signal, then the touch panel can function, but the RC of the V-com after division becomes overly large and non-uniform, resulting in flicker and mura
Solution Approach 1:
The patent divides the common ITO layer into multiple independent ITO regions (first ITO region, second ITO region, third ITO region, fourth ITO region) separated by metal lines. Each region is independently driven by the IC, allowing separate control of voltage signals to each region. This segmentation enables uniform RC characteristics across different regions while maintaining touch panel functionality.
Solution Approach 2:
The patent applies different voltage signals to different ITO regions through the IC. The first ITO region receives a first voltage signal, the second ITO region receives a second voltage signal, and so on. This local quality approach allows each region to have optimized electrical characteristics, ensuring uniform RC distribution and eliminating flicker and mura effects.
2Ease of operation
If metal lines are distributed on com ITO to transmit IC signals to different ITO regions, then signal transmission is achieved, but the resistance varies significantly across regions (R vs 5R), causing non-uniform RC distribution
Solution Approach 1:
The patent segments the common ITO into multiple regions with metal lines positioned between them. By placing touch control holes at specific locations and dividing the ITO regions accordingly, the patent ensures that each region has comparable resistance characteristics (R) rather than cumulative resistance differences (R vs 5R). This segmentation strategy achieves both signal transmission and resistance uniformity.
Solution Approach 2:
The patent structures the metal lines and touch control holes to create equipotential regions. By carefully positioning the metal lines and dividing the ITO regions, the patent ensures that voltage signals are distributed uniformly across all regions, achieving equipotential conditions that eliminate resistance variations and RC non-uniformity.
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 solution effectively reduces the resistance and uniformity of the resistance distribution, minimizing flicker and mura, thereby improving the display panel's performance and safety by reducing the likelihood of short circuits.
Implementation Method 1
The introduction of a switch set comprising multiple switches with strategically connected metal wires and voltage signals to create a parallel resistance path for IC signal transmission across ITO regions, reducing the resistance difference and enhancing uniformity
Data Source
AI summary
The present invention provides a touch panel wire arrangement circuit, the touch panel wire arrangement circuit comprises: an ITO region, metal wires, a touch control hole and an integrated circuit; the touch panel wire arrangement circuit further comprises: a rear end switch set, and the rear end switch set comprises: a plurality of switches, and a G electrode of each switch in the plurality of switches is inputted with a switch signal, and D electrodes of the plurality of switches are sequentially coupled to rear ends of the metal wires, and S electrodes of the plurality of switches are inputted with at least one voltage signals; the switch signal is: a signal at high voltage level as a touch panel TP signal does not function; the voltage signal is a common voltage V-com signal as the touch panel is in a display state.