Touch Display Panel Bonding Pad Reduction via Demultiplexing
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Solution Overview
Problem
Existing touch display panels face challenges with a large number of bonding pads, which compress design space and increase design difficulty, leading to reduced yield rates in the manufacturing process.
Innovation Solution
The implementation of a touch display panel design that includes multiple demultiplexing circuit units, where at least one demultiplexing circuit from each unit is electrically connected to the same bonding pad, reducing the overall number of bonding pads required.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple demultiplexing circuit units are introduced to reduce the number of bonding pads, then the number of bonding pads is reduced, but the design complexity of the circuit structure increases
Solution Approach 1:
The demultiplexing circuit is divided into multiple independent demultiplexing circuit units, each handling a subset of touch electrode columns. This segmentation allows each unit to be designed and manufactured separately, then integrated together, reducing the overall bonding pad requirements while maintaining functionality through modular architecture
Solution Approach 2:
Multiple demultiplexing circuit units share common bonding pads and signal lines, allowing these components to serve multiple functions and multiple circuit units simultaneously. This multi-functionality reduces the total number of bonding pads needed, as the same bonding pad can be shared across different demultiplexing circuit units through proper signal routing and timing control
2Area of stationary object
If the number of bonding pads is reduced by using demultiplexing circuit structure, then design space is improved, but the manufacturing precision requirements increase
Solution Approach 1:
By segmenting the demultiplexing circuit into multiple units with shared bonding pads, the patent reduces the total bonding pad count, thereby increasing the available design space. The segmented structure allows for more flexible layout arrangements while maintaining manageable connection complexity for manufacturing
Solution Approach 2:
The patent uses identical or similar demultiplexing circuit unit designs that can be replicated across different columns. This copying approach standardizes the circuit structure, reducing manufacturing precision requirements through repetition and consistency, while the shared bonding pads further reduce the overall pad count and increase design space
Data Source
AI summary
A touch display panel and an electronic device are provided. The electronic device has a touch display panel. The touch display panel has a plurality of touch electrodes, at least two demultiplexing circuit units, and a plurality of bonding pads. The demultiplexing circuit unit has a plurality of demultiplexing circuits. The number of bonding pads can be further reduced by electrically connecting the demultiplexing circuits in different demultiplexing circuit units to the same bonding pad.