Micro-light emitting array for implantable device skin contact
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Solution Overview
Problem
Existing implantable electronic devices in the human body face challenges in efficiently receiving power due to the limitations of ambient light energy harvesting, which results in the need for lengthy electric wires that can cause side effects, and battery replacement burdens patients.
Innovation Solution
A micro-light emitting array is designed with a substrate, heat sink, light emitting devices, a connector, insulating layer, fixing member, and adhesive layer, allowing direct contact with the skin and efficient energy transmission through a through hole structure and multi-metal layers, including copper, to provide a robust and efficient power delivery system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If ambient light energy is used to power implantable electronic devices, then the device can receive energy from outside the body, but the amount of energy charged is insufficient
Solution Approach 1:
The light emitting device is divided into multiple light emitting units arranged in an array pattern, where each unit contains a light emitting diode and associated electrode structures. This segmentation allows the device to cover a larger skin surface area and transmit energy more intensively to the implantable device, resolving the contradiction between energy charging amount and energy output by distributing multiple light emitting elements across the substrate.
2Adaptability or versatility
If a long electric wire is used to connect the receive terminal to the operating position, then the device can function with variable positions, but the wire causes side effects to the human body
Solution Approach 1:
The patent extracts and eliminates the need for long electric wires by implementing wireless energy transmission through light emitting diodes. The light emitting units convert electrical energy to light energy, which penetrates the skin to charge the implantable device's battery wirelessly, thereby removing the harmful wire component while maintaining position variability.
Solution Approach 2:
The mechanical connection system (electric wires) is replaced with an optical energy transmission system. Light emitting diodes generate photons that transmit energy through the skin tissue to the implantable device, substituting the mechanical wire-based power delivery with a non-contact optical field-based approach that eliminates physical side effects.
3Power
If multiple light emitting devices are disposed closely together, then energy transmission intensity increases, but heat generation and manufacturing complexity increase
Solution Approach 1:
The device is segmented into multiple independent light emitting units with standardized structures, each containing a light emitting diode, anode, cathode, and associated conductive layers. This modular segmentation enables intensive energy transmission through close spacing of units while managing complexity through repetition of standardized components rather than custom designs.
Solution Approach 2:
The light emitting units are designed with universal, identical structures that perform the same function, allowing them to be manufactured using standardized processes. This universality reduces manufacturing complexity despite the increased number of units, as the same fabrication steps and component specifications are repeated across all light emitting elements in the array.
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 micro-light emitting array enables rapid and effective energy supply to implantable electronic devices, reducing the need for lengthy wires and minimizing side effects, while ensuring strong adhesion and efficient heat management.
Implementation Method 1
at least two light emitting devices disposed on the heat sink and spaced apart from each other
Implementation Method 2
a heat sink disposed on the substrate, at least two light emitting devices disposed on the heat sink
Data Source
AI summary
A light emitting device array includes a substrate, a heat sink disposed on the substrate, at least two light emitting devices disposed on the heat sink and spaced apart from each other, a connector disposed on the light emitting device and configured to apply power, an insulating layer interposed between the heat sink and the connector, a fixing member configured to support a position of the light emitting device, on the light emitting device, and an adhesive layer provided on the fixing member to make contact with a skin.