Pressure Sensitive Display Device with Integrated Touch Electrode
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Solution Overview
Problem
Current pressure sensitive display devices are costly, complex, and lack intuitive recognition of pressure signals, making it difficult to achieve high performance, ultra-minuteness, and sensitivity simultaneously.
Innovation Solution
A pressure sensitive display device with a simple structure comprising a flexible sensing substrate, a transparent reaction substrate, and spacers, where the touch electrode contacts a light emitting layer to emit light in response to external pressure, allowing for high sensitivity and intuitive pressure signal recognition without the need for additional intermediate components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a resistance variation-type or capacitance variation-type pressure sensor is used with scanning and analysis, then pressure measurement capability is achieved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges the pressure sensing function and light emission function into a single integrated structure. The touch electrode serves as both the pressure sensing element and the anode for the light-emitting layer, eliminating the need for separate sensing components and signal processing circuits. This integration directly resolves the contradiction by maintaining pressure measurement capability while significantly reducing device complexity.
Solution Approach 2:
The touch electrode performs multiple functions simultaneously: it acts as the pressure-sensitive element, the electrical contact for the light-emitting layer, and the signal transmission path. This multi-functionality eliminates the need for separate components dedicated to each function, thereby reducing overall device complexity while preserving full pressure measurement capability.
2Loss of information
If scanning and analysis of input signals is performed, then pressure position and motion information is obtained, but response time increases
Solution Approach 1:
The device performs self-detection and self-display functions. When pressure is applied, the touch electrode directly contacts the light-emitting layer at the pressed position, causing immediate light emission that visually indicates the pressure location and motion. This eliminates the need for separate scanning and analysis processes, achieving real-time response without information loss.
3Measurement precision
If multiple layers and intermediate components are added to improve sensitivity, then pressure detection sensitivity increases, but device thickness and complexity increase
Solution Approach 1:
The patent employs a flexible substrate and thin-film structures for the touch electrode and light-emitting layer. This allows the device to achieve high pressure detection sensitivity through direct contact while maintaining minimal thickness. The flexible nature enables the electrode to conform and contact the light-emitting layer efficiently without requiring bulky intermediate 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
The device achieves improved electrical characteristics and high sensitivity by directly converting pressure into light, enabling real-time, precise detection of pressure points and areas with a simplified configuration and reduced thickness.
Implementation Method 1
the light emitting layer may emit light by the contact with the touch electrode
Data Source
AI summary
Provided is a pressure sensitive display device including a sensing substrate, a reaction substrate provided on the sensing substrate, and spacers provided between the sensing substrate and the reaction substrate to space the sensing substrate apart from the reaction substrate. Here, the sensing substrate includes a flexible substrate and a touch electrode provided on one surface of the flexible substrate, which faces the reaction substrate. The reaction substrate includes a transparent substrate, a transparent electrode provided on one surface of the transparent substrate, which faces the sensing substrate, and a light emitting layer disposed on the transparent electrode.