Touch Display Panel Multiplexer in Bending Area
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Solution Overview
Problem
The complexity of peripheral wirings in flexible multi-layer integrated touch technology (FMLOC) for display panels, particularly in foldable and rollable devices, necessitates a more efficient routing solution to reduce space and increase touch functionality while maintaining high resolution and slim frame designs.
Innovation Solution
Incorporating a multiplexer in the touch display panel's peripheral area to reduce the number of signal lines and channels, allowing for efficient electrical connection between touch electrodes and an external circuit, thereby minimizing the physical spacing and increasing the pitch between connection points, which also reduces production costs and improves product yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If peripheral wirings are routed through film layers in the bending area to connect FPC board and test interfaces, then the display panel achieves flexible multi-layer integrated touch functionality, but the wiring complexity increases significantly
Solution Approach 1:
The patent combines multiple touch signal lines (first touch lines and second touch lines) into a single shared channel by introducing a first multiplexer. The first multiplexer receives signals from multiple touch electrodes through different touch lines and outputs them through a shared channel to the FPC board, thereby reducing wiring complexity while maintaining flexible multi-layer integrated touch functionality.
Solution Approach 2:
The first multiplexer is designed to handle multiple touch signal lines (both first touch lines and second touch lines) through a single device interface. This multi-functional approach allows one channel to serve multiple purposes, reducing the overall number of required channels and simplifying the wiring structure in the bending area.
2Reliability
If multiple separate channels are used for first touch lines and second touch lines, then each touch electrode can be independently connected, but the number of channels and wiring increases
Solution Approach 1:
The patent merges multiple touch signal lines into a single shared channel using a first multiplexer. The multiplexer independently processes first touch lines and second touch lines, allowing each touch electrode to maintain independent connection capability while sharing a common output channel to the FPC board, thereby reducing the total number of channels required.
Solution Approach 2:
The first multiplexer dynamically switches between different touch lines (first touch lines and second touch lines) to share a common channel. This dynamic switching mechanism ensures that each touch electrode can be independently connected and addressed while utilizing a reduced number of physical channels, optimizing the wiring structure.
3Manufacturing precision
If more signal lines and channels are used to maintain high resolution and touch functionality, then the display quality improves, but the frame size increases and production cost increases
Solution Approach 1:
The patent combines multiple touch signal lines into fewer channels through the use of a first multiplexer located in the peripheral area. This merging reduces the number of required signal lines and channels, thereby minimizing the physical spacing and frame size while maintaining high resolution display quality and touch functionality.
Solution Approach 2:
The first multiplexer is positioned in the peripheral area of the display panel, utilizing the peripheral space efficiently. This spatial arrangement allows for signal line consolidation without interfering with the display area, thereby reducing frame size while preserving display quality and touch functionality.
4Adaptability or versatility
If more signal lines and channels are used for comprehensive touch coverage, then touch functionality is enhanced, but production cost increases and product yield decreases
Solution Approach 1:
The patent merges multiple touch signal lines into a reduced number of channels using a first multiplexer, which simplifies the wiring structure and reduces manufacturing complexity. This approach maintains comprehensive touch functionality while lowering production costs and improving product yield by reducing the number of required channels and connection points.
Data Source
AI summary
A touch display panel is provided in embodiments of the present disclosure. The touch display panel may include: a display area including a plurality of first touch electrodes and a plurality of second touch electrodes; and a peripheral area located around the display area; the peripheral area includes: first touch lines electrically connected with at least one of the plurality of first touch electrodes; second touch lines electrically connected with at least one of the plurality of second touch electrodes; an external circuit interface configured to provide an electrical connection between the touch display panel and an external circuit; and a first multiplexer, which is electrically connected at an output port thereof with at least either one of the first touch lines and the second touch lines and electrically connected at an input port thereof with the external circuit interface.