Pressure Sensor with Elastic Composite Electrode and Organic Light Emitting Layer
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Solution Overview
Problem
Existing pressure sensors lack sensitivity, response speed, and efficiency in industrial applications due to limitations in their design and functionality.
Innovation Solution
A pressure sensor integrating an organic electroluminescent device with an elastic composite electrode, featuring a compressible space defined by insulating supports, a conductive elastic sublayer, and an organic light emitting layer that emits light in response to pressure, allowing for low power consumption and high sensitivity pressure detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing pressure sensor designs are used, then manufacturing simplicity is maintained, but sensitivity and response speed are insufficient
Solution Approach 1:
The patent combines the pressure sensing function with an organic electroluminescent display structure into a single integrated device. The pressure sensor and display layer share common structural elements (electrodes, encapsulation layers), allowing simultaneous pressure detection and visual display functions without proportionally increasing device complexity
Solution Approach 2:
The organic electroluminescent layer serves dual purposes: as the display emission layer and as part of the pressure sensing mechanism. When pressure is applied, it modulates the light emission intensity, enabling both pressure detection and visual output through a single functional component
2Speed
If existing pressure sensors are used, then power consumption is not optimized, but response speed and sensitivity improve
Solution Approach 1:
The organic electroluminescent material responds to pressure changes by modulating light emission in real-time. The display updates only when pressure changes occur, creating a periodic action that consumes energy only during state transitions rather than continuous operation, thus improving response speed while optimizing power consumption
Solution Approach 2:
The organic electroluminescent layer inherently provides both the display function and the pressure sensing function through its material properties. The pressure-induced changes in light emission are directly observable, eliminating the need for separate sensing and display systems that would consume additional power
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 sensor achieves fast response and high sensitivity pressure detection with low power consumption by correlating light emitting parameters with pressure values, enabling accurate pressure measurement through a standard pressure curve.
Implementation Method 1
an organic light emitting layer between the first electrode and the second electrode, the organic light emitting layer being in contact with one of the first electrode and the second electrode
Implementation Method 2
an elastic composite electrode on a side of the at least two supports facing away the first electrode... the conductive elastic sublayer being a planar structure
Data Source
AI summary
A pressure sensor, a manufacturing method thereof, a pressure sensing method and a display device are provided. The pressure sensor includes a first electrode, at least two supports on a first surface of the first electrode, an elastic composite electrode on a side of the supports facing away from the first electrode. Two adjacent supports of the supports, the elastic composite electrode and the first electrode define a compressible space, and the at least two supports are formed of an insulating material. The pressure sensor further comprises a second electrode on a side of the elastic composite electrode facing away from the first electrode and an organic light emitting layer between the first electrode and the second electrode, the organic light emitting layer being in contact with one of the first electrode and the second electrode. The pressure sensor has advantages of low power consumption, fast response and high sensitivity.