Pressure-Sensitive Light Emitter With Shared Electrode Voltage Control
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Solution Overview
Problem
Conventional self-generating pressure-sensitive light-emitting devices face challenges in controlling the magnitude and duration of output voltage due to signal interference and short output duration, limiting their ability to distinguish pressure levels accurately.
Innovation Solution
A self-generating pressure-sensitive light-emitting device is designed with an electrochemical light-emitting device and a triboelectric self-generating device sharing an electrode and capacitor layer, allowing direct transmission of adjusted alternating current voltage for real-time recognition of pressure magnitude and location without separate signal conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a piezoelectric device and triboelectric self-generating device are connected in parallel to a light-emitting diode, then the presence or absence of mechanical stimulation can be detected, but the magnitude of output voltage cannot be controlled and signal interference occurs
Solution Approach 1:
The patent combines the piezoelectric device and triboelectric self-generating device into a single integrated structure where they share common electrodes and a capacitor. This merging eliminates signal interference from separate parallel connections while enabling controlled voltage output through the capacitor's charge-discharge mechanism, allowing accurate pressure magnitude detection.
Solution Approach 2:
The capacitor serves as an intermediary element between the piezoelectric and triboelectric devices. It stores electrical energy generated by mechanical stimulation and releases it in a controlled manner to drive the light-emitting diode, thereby controlling the magnitude of output voltage and preventing signal interference while maintaining detection accuracy.
2Ease of operation
If separate patterning of piezoelectric device, triboelectric self-generating device and light emitting device is performed, then tactile interface can be implemented, but output duration is very short
Solution Approach 1:
The patent merges the patterning processes of the piezoelectric device, triboelectric self-generating device, and light-emitting device into a single integrated structure. They share common electrodes and a capacitor, which extends the output duration by storing electrical energy and releasing it gradually, thereby maintaining tactile interface functionality while solving the short output duration problem.
3Use of energy by moving object
If piezoelectric device and triboelectric self-generating device are connected in parallel, then mechanical stimulation can be converted to electrical energy, but luminous efficiency is low
Solution Approach 1:
The capacitor acts as an intermediary energy storage device between the piezoelectric and triboelectric generators and the light-emitting diode. It accumulates electrical energy from both devices and releases it in a controlled manner, improving luminous efficiency by ensuring sufficient voltage and current are delivered to the LED without energy loss from direct parallel connection.
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 enables continuous monitoring of pressure-sensitive signals with adjustable output duration and increased luminous efficiency, suitable for applications requiring visual feedback on external force, such as tactile interfaces and healthcare devices.
Implementation Method 1
Triboelectricity is a new concept of eco-friendly energy generation method that can produce consumable mechanical energy into electrical energy, unlike existing eco-friendly energy sources such as solar cells and wind power generation
Implementation Method 2
electrochemical light-emitting device in which a first electrode, a light-emitting layer and a second electrode are sequentially formed
Data Source
AI summary
Disclosed are a self-generating pressure-sensitive light-emitting device and a method of manufacturing the same. The self-generating pressure-sensitive light-emitting device includes an electrochemical light-emitting device in which a first electrode, a light-emitting layer and a second electrode are sequentially formed; and a triboelectric self-generating device formed on the second electrode and configured to share the second electrode of the electrochemical light-emitting device, wherein the electrochemical light-emitting device and the triboelectric self-generating device share the second electrode and thus the electrochemical light-emitting device is driven due to a potential difference generated from the triboelectric self-generating device.