Touch functional component, display panel, and display apparatus
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Solution Overview
Problem
The impedance difference between sensing and driving electrodes in touch functional components of display panels results in slower electrical signal transmission, reducing the response speed of the display panel to operations.
Innovation Solution
A touch functional component design with first and second electrodes, connected by first and second connection bridges, forms parallel branches to reduce impedance differences, ensuring consistent or nearly consistent transmission speeds for both electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensing electrode has higher impedance to achieve touch sensitivity, then the touch detection capability is improved, but the electrical signal transmission speed decreases
Solution Approach 1:
The sensing electrode is divided into multiple electrode protrusions that are distributed in an array. Each protrusion is connected through connection bridges, forming multiple parallel signal transmission paths. This segmentation allows the electrode to maintain high impedance for touch sensitivity while the parallel paths collectively reduce the overall transmission impedance, thereby improving signal transmission speed.
Solution Approach 2:
The electrode structure transitions from a flat two-dimensional layout to a three-dimensional structure with protrusions extending toward the driving electrode. This dimensional change increases the effective surface area and creates multiple transmission channels, enabling simultaneous maintenance of high impedance for detection and low overall impedance for fast signal transmission through the multi-path architecture.
2Reliability
If the driving electrode has higher impedance to achieve driving capability, then the electrode function is improved, but the response speed to operations decreases
Solution Approach 1:
The driving electrode is segmented into multiple electrode protrusions arranged in an array, with each protrusion connected via connection bridges. This creates multiple parallel transmission paths that maintain the necessary impedance for driving functionality while reducing the overall signal transmission impedance, thereby decreasing the time loss and improving response speed to touch operations.
3Reliability
If the impedance difference between sensing and driving electrodes is large to maintain electrode characteristics, then the electrode performance is improved, but the transmission speed consistency decreases
Solution Approach 1:
Both sensing and driving electrodes are segmented into identical array structures with multiple protrusions and connection bridges. This symmetrical segmentation creates corresponding parallel transmission paths in both electrodes, ensuring that the impedance characteristics are matched and the transmission speed consistency is improved, while each electrode maintains its required performance through the multi-path architecture.
Data Source
AI summary
A touch functional component, a display panel, and a display apparatus. The touch functional component includes: first electrodes; second electrodes; first connection bridges, at least one of which electrically connects an electrode protrusion of one first electrode with an electrode body of the other first electrode; and second connection bridges, at least one of which electrically connects a first electrode structure with a second electrode structure of the second electrode.