Touch Display Panel With Functional Multiplexing Chip
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Solution Overview
Problem
Current flexible display technologies require a large number of external hardware components, which hinder integration and increase manufacturing costs, and the traces between the touch layer and functional multiplexing chip are lengthy, leading to potential signal loss.
Innovation Solution
A touch display panel design that integrates a functional multiplexing chip with both touch and display functions, using a flexible printed circuit to connect the chip to a memory chip for voltage compensation and firmware, and includes an insulating layer between the display panel and touch layer, reducing the number of chips and shortening the trace length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple separate chips are used for touch and display functions, then functional flexibility is improved, but device complexity increases and manufacturing costs increase
Solution Approach 1:
The patent combines the touch controller chip and display driver chip into a single integrated chip that can simultaneously control both touch sensing and display driving functions. This integration reduces the number of separate chips from two to one, simplifying the overall device structure while maintaining the ability to perform both touch and display functions independently and simultaneously.
Solution Approach 2:
The integrated chip is designed with multiple functional modules that can perform different operations: a touch controller module for touch sensing, a display driver module for driving the display panel, and a memory module for storing compensation data. This multi-functional design allows a single chip to replace multiple specialized chips, reducing device complexity while preserving functional versatility.
2Ease of manufacture
If external hardware components are reduced, then integration is improved and manufacturing costs decrease, but signal transmission reliability may worsen
Solution Approach 1:
By integrating the touch controller and display driver into a single chip with shared memory and control resources, the patent reduces the number of external connections and interface traces required. This integration minimizes the trace length between functional modules, reducing signal attenuation and interference while lowering manufacturing complexity and costs.
Solution Approach 2:
The integrated chip includes an on-chip memory module that serves as an intermediary for storing and managing compensation data, firmware, and operational parameters. This on-chip memory eliminates the need for external memory components and reduces the length of data transmission traces, thereby improving signal reliability while reducing the number of external hardware components.
3Reliability
If trace length between touch layer and multiplexing chip is shortened, then signal loss is reduced, but chip integration complexity increases
Solution Approach 1:
The patent merges the touch controller, display driver, and memory into a single integrated chip, which fundamentally shortens the trace length between the touch layer and the control chip. All functional modules are located on the same chip, eliminating long external traces and reducing signal loss, while the integration is achieved through modular design to manage complexity.
Solution Approach 2:
The patent employs a multi-layer chip architecture where different functional modules are arranged in three-dimensional space on the chip. This spatial arrangement optimizes the internal trace routing, minimizing the length of signal paths between the touch sensing electrodes and the control circuits while managing the complexity of integrating multiple functions on a single chip.
Data Source
AI summary
A touch display panel and an electronic device are provided. The touch display panel comprises a display panel comprising a display area and a non-display area, a touch layer arranged on the display panel and in the display area, a functional multiplexing chip configured to drive the display panel to display and to drive the touch layer for touch sensing, a flexible printed circuit (FPC), connected to the non-display area of the display panel, and a memory chip configured to store information arranged on the FPC and electrically connected to the functional multiplexing chip.