Integrated Pressure and Touch Electrodes for Display Panels
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Solution Overview
Problem
Existing touch display panels face challenges in integrating touch detection and pressure detection functions efficiently, leading to complex manufacturing processes, increased costs, and reduced product performance and lifespan due to separate drive electrodes and touch sensing electrodes.
Innovation Solution
A touch display panel design that integrates pressure sensors with touch sensing electrodes on the same side of the substrate, where a pressure electrode acts as both a pressure sensor and a drive electrode, forming a touch circuit, and utilizing a piezoelectric material layer for sensitive pressure detection, reducing the need for additional drive electrodes and simplifying manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If separate drive electrodes and touch sensing electrodes are used in existing touch display panels, then touch detection function is achieved, but manufacturing complexity increases and costs increase
Solution Approach 1:
The patent combines the drive electrode and touch sensing electrode into a single integrated electrode structure. The first electrode serves dual functions as both a drive electrode for pressure sensing and a touch sensing electrode, eliminating the need for separate drive electrodes and reducing manufacturing complexity while maintaining touch detection functionality.
Solution Approach 2:
The first electrode is designed to perform multiple functions simultaneously: it acts as a drive electrode for the pressure sensor, a touch sensing electrode for touch detection, and provides electrical connection through the conductive adhesive layer. This multi-functionality reduces the number of components and simplifies the overall structure.
2Ease of manufacture
If pressure sensors and touch sensing electrodes are integrated on the same side of the substrate, then manufacturing process is simplified, but electrical connection between components becomes more challenging
Solution Approach 1:
The patent introduces a conductive adhesive layer as an intermediary element that provides electrical connection between the first electrode (pressure sensor component) and the second electrode (touch circuit component). This conductive adhesive layer simplifies the manufacturing process by enabling direct lamination while maintaining electrical connectivity, avoiding the need for separate connection structures.
3Reliability
If additional drive electrodes are added for pressure detection, then pressure sensing function is improved, but product cost increases and manufacturing becomes more complex
Solution Approach 1:
The patent merges the pressure sensing drive electrode function with the touch sensing electrode into a single first electrode structure. This integrated electrode performs both pressure detection driving and touch sensing, eliminating the need for additional separate drive electrodes while maintaining reliable pressure detection functionality.
Solution Approach 2:
The first electrode is designed with multi-functionality to serve as both the drive electrode for pressure sensing and the touch sensing electrode. This universal design achieves reliable pressure detection without increasing electrode structure complexity or requiring additional components.
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 integrated approach reduces manufacturing complexity, saves costs, and enhances product performance and lifespan by combining touch and pressure detection functions, while also enabling flexible and thin display designs, particularly beneficial for wearable devices.
Implementation Method 1
utilizing a piezoelectric material layer for sensitive pressure detection
Data Source
AI summary
The present disclosure provides a touch display panel, a display device, and a drive method. The touch display panel includes a substrate, a plurality of touch sensing electrodes, and a plurality of pressure sensors. The substrate is provided with a light emission side; and a plurality of touch sensing electrodes and a plurality of pressure sensors. The pressure sensors and the touch sensing electrodes are positioned at the light emission side of the substrate. The pressure sensor includes a first pressure electrode and a second pressure electrode. The first pressure electrode is formed on the display panel. The second pressure electrode and the touch sensing electrode jointly form a touch circuit, and the second pressure electrode is used as a drive electrode of the touch circuit.