Wearable Display Dual-Case Heat Dissipation
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Solution Overview
Problem
Wearable display devices, such as head-mounted displays, face challenges in heat dissipation due to their compact and lightweight design, which can lead to performance degradation and reduced operational life, especially when using heat-generating components like organic EL display panels.
Innovation Solution
The wearable display device employs a dual-case member structure with a heat insulating layer between them, where one case member dissipates heat from the circuit boards and the other from the display element, ensuring efficient heat dissipation while maintaining a stable temperature for the display element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If multiple heat generating electronic components and heat dissipation plates are incorporated in the outer case, then heat dissipation performance is improved, but the device size and weight increase
Solution Approach 1:
The outer case is divided into a first case member and a second case member with different heat dissipation functions. The first case member dissipates heat from circuit boards while the second case member dissipates heat from the display element, allowing targeted heat management without requiring a single large heat dissipation structure
Solution Approach 2:
A heat insulating structure is introduced as an intermediary between the first and second case members. This heat insulator prevents heat from the circuit boards from transferring to the display element, enabling independent temperature control of each component without requiring larger overall heat dissipation structures
2Temperature
If multiple heat generating electronic components and heat dissipation plates are incorporated in the outer case, then heat dissipation performance is improved, but the device volume increases
Solution Approach 1:
The outer case is segmented into functional zones: the first case member handles circuit board heat dissipation while the second case member handles display element heat dissipation. This segmentation allows compact arrangement of heat dissipation structures for different components without requiring a single large volume heat dissipation system
Solution Approach 2:
The heat insulating structure acts as a space-efficient intermediary that blocks heat transfer between components without requiring additional volume. By preventing heat transfer through a thin insulating layer rather than increasing overall device volume, effective heat management is achieved in a compact form factor
3Stability of the object's composition
If heat from circuit boards is allowed to transfer to the display element, then thermal equilibrium is achieved, but the display element temperature increases causing performance degradation
Solution Approach 1:
A heat insulating structure is positioned between the first case member (containing heat-generating circuit boards) and the second case member (containing the display element). This heat insulator acts as a thermal barrier that selectively blocks heat transfer from the circuit boards to the display element, maintaining the display element at a stable, low temperature independent of circuit board heat generation
Solution Approach 2:
The thermal management system is segmented into independent thermal zones. The first case member and second case member are thermally decoupled through the heat insulator, allowing each component to maintain its own optimal temperature range. This segmentation prevents thermal equilibrium from causing display element overheating while still allowing each component to achieve its own thermal stability
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
This configuration effectively manages heat dissipation, maintaining the display element at a stable low temperature and extending its operational life by preventing heat from the circuit boards from influencing the display element's temperature.
Implementation Method 1
the first case member being configured to dissipate heat generated by the circuit board to outside
Implementation Method 2
the first case member being configured to dissipate heat generated by the circuit board to outside
Implementation Method 3
the second case member being disposed farther to a wearer side than the first case member is and configured to dissipate heat generated by the display element to the outside
Implementation Method 4
the second case member being disposed farther to a wearer side than the first case member is and configured to dissipate heat generated by the display element to the outside
Implementation Method 5
a heat insulating structure disposed between the first case member and the second case member
Data Source
AI summary
A wearable display device includes a display element, a circuit board, an outer case including a first case member and a second case member, the first case member being configured to dissipate heat generated by the circuit board to outside, the second case member being disposed farther to a wearer side than the first case member is and configured to dissipate heat generated by the display element to the outside, and a heat insulating structure disposed in a region where the first case member and the second case member face each other.