Patch Wearable Passive Radiation Layer for Heat Dissipation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wearable devices face challenges in obtaining accurate data due to heat generation, especially when used outdoors, leading to potential skin burns and measurement inaccuracies, as they struggle to effectively manage heat and external light interference.
Innovation Solution
A patch-type wearable device with a circuit layer containing light emitting and receiving elements, a wireless communication module, and a passive radiation layer made of porous polymers that exhibit high reflectance in the visible light band and emissivity in the long infrared band, along with an encapsulation layer to block internal optical noise, allowing for efficient heat dissipation and improved light efficiency without the use of metal heat sinks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a wearable device is used outdoors, then more heat is generated due to absorption of sunlight, but it becomes very difficult to obtain accurate data
Solution Approach 1:
The patent converts the harmful effect of sunlight absorption into a beneficial passive radiation cooling effect. The upper layer is designed with specific optical properties to reflect visible light (preventing heat generation) while emitting infrared radiation (active cooling), thereby converting the potential harm of outdoor sunlight exposure into an active cooling mechanism that maintains measurement accuracy.
Solution Approach 2:
The patent changes the optical parameters of the upper layer material to achieve selective radiation characteristics. By adjusting the material's properties to have high reflectance in the visible spectrum and high emissivity in the infrared spectrum, the device transforms how it interacts with thermal radiation, enabling effective heat dissipation while maintaining data accuracy under outdoor conditions.
2Temperature
If a wearable device generates heat for a long period of time, then it may cause a slight burn on a user's skin, but continuous operation is required for health monitoring
Solution Approach 1:
The patent addresses long-term heat accumulation by implementing passive radiation cooling that continuously dissipates heat without requiring power input. This converts the harmful heat accumulation effect into a beneficial self-cooling mechanism, allowing the device to operate continuously for health monitoring without causing skin burns, as the heat is actively radiated away passively.
Solution Approach 2:
The upper layer structure provides self-cooling functionality without requiring external power or active cooling components. The material's inherent optical properties enable it to automatically reflect sunlight and emit infrared radiation, creating a self-sustaining cooling system that operates continuously without consuming energy or requiring user intervention.
3Reliability
If an encapsulation layer is added to block internal optical noise, then light efficiency is improved, but device complexity increases
Solution Approach 1:
The patent implements multi-functionality by designing the upper layer to simultaneously serve as both the passive radiation cooling structure and the encapsulation layer. This single layer performs multiple functions: reflecting visible light, emitting infrared radiation, blocking internal optical noise, and protecting the circuit layer, thereby improving light efficiency without significantly increasing device complexity through additional separate 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 solution effectively reduces heat buildup, enhances data accuracy, prevents skin damage, and improves light efficiency, enabling reliable biometric measurements with reduced weight and size, while avoiding the need for batteries for cooling, thus increasing portability and reducing measurement errors.
Implementation Method 1
a passive radiation layer disposed on the circuit layer and configured to emit light to the outside in a long infrared band
Implementation Method 2
improving a visible light reflection effect, a heat radiation effect
Implementation Method 3
an encapsulation layer disposed between the light emitting element and the light receiving element to block internal optical noise
Implementation Method 4
The passive radiation layer may be made of a porous polymer and may exhibit passive radiation characteristics
Implementation Method 5
effectively removing heat from a wearable device
Data Source
AI summary
A patch-type wearable device includes a circuit layer including a light emitting element and a light receiving element, a wireless communication module mounted on the circuit layer and configured to communicate with another device, and a passive radiation layer constituting an upper layer of the circuit layer and exhibiting passive radiation characteristics.