Thermal Hinge Design for Heat Transfer Across Hinged Electronics
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electronic devices, particularly head-mounted devices, face challenges in efficiently transferring heat across mechanical articulations, leading to hot spots and thermal differentials due to inadequate heat dissipation mechanisms.
Innovation Solution
A thermal hinge system is employed, comprising a thermally conductive living hinge and complementary thermal interface components, which facilitate heat transfer and electrical signal transmission across mechanical articulations in electronic devices, such as between the temple arm and front frame of glasses, using a mechanism that allows for contact and separation of thermal interface components with the operation of the hinge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional heat transfer mechanisms are used in hinged electronic devices, then device structure is simple, but thermal differentials and hot spots occur due to inadequate heat transfer across mechanical articulations
Solution Approach 1:
The thermal interface components are nested within the mechanical hinge structure itself. The hinge assembly integrates thermal conduction elements that are positioned to contact mating surfaces when the hinge is in its closed position, allowing heat transfer without adding external bulk to the device.
Solution Approach 2:
Thermal interface components serve as intermediary elements between hinged portions, facilitating heat transfer across the mechanical articulation. These components mediate the thermal energy transfer by providing thermally conductive pathways that bridge the gap between moving hinge surfaces.
2Loss of energy
If thermal interface components are continuously in contact to maximize heat transfer, then heat dissipation is improved, but mechanical articulation freedom is restricted
Solution Approach 1:
The thermal interface system is designed to be dynamic rather than static. The thermal interface components make contact only when the hinge is in its operational closed position, and separate when the hinge moves. This dynamic configuration allows full mechanical articulation freedom while maintaining effective thermal contact during use.
Solution Approach 2:
The thermal interface components engage and disengage periodically with hinge movement. During normal device operation when the hinge is closed, thermal contact is maintained for continuous heat dissipation. When the hinge opens for adjustment or storage, the thermal path naturally disconnects, allowing mechanical freedom without compromising overall thermal management performance.
3Volume of moving object
If device size is reduced to meet portability demands, then portability is improved, but heat dissipation capability deteriorates due to limited surface area
Solution Approach 1:
Instead of attempting to cool the entire device uniformly, the thermal hinge system concentrates heat transfer capability at the hinge location. By providing highly conductive thermal pathways specifically at the mechanical articulation point, the system efficiently removes heat from internal components without requiring large external heat dissipation surfaces.
Solution Approach 2:
The thermal management solution moves heat transfer from a two-dimensional surface-based approach to a three-dimensional volumetric approach. The thermal interface components create internal heat pathways through the hinge structure, utilizing the volume of the hinge assembly itself as a heat conduction medium rather than relying on external surface area for dissipation.
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 system effectively reduces thermal differentials, enhances heat dissipation, and achieves isothermal conditions by allowing efficient heat transfer between hinged portions of electronic devices, thereby preventing overheating.
Implementation Method 1
a thermally conductive living hinge and complementary thermal interface components, which facilitate heat transfer
Data Source
AI summary
A method and system to conduct thermal energy between two hinged portions of an electric device. In examples, the method employs a thermal hinge system configured to transfer or spread thermal energy, and optionally electrical energy, through a mechanical articulation or hinge in an electronic device. A thermal hinge may include a thermally conductive living hinge, complementary and/or mating thermal interface components, or a combination of both.