Headset Display Cooling via Cavity Segmentation and Thermal Barrier
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Solution Overview
Problem
Existing wearable electronic devices with virtual or mixed reality capabilities face challenges in adequately cooling their display technologies and processing components, leading to potential overheating issues.
Innovation Solution
The implementation of a head-mounted display system with a physically separated front and rear system, where the front system includes displays and optical modules, and the rear system houses high-temperature computing components. This configuration utilizes a thermal separator wall and a cooling system with air inlets and outlets to maintain component temperatures within desired thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If computing components and display components are integrated in the same housing, then device complexity is reduced, but temperature control of display components deteriorates
Solution Approach 1:
The housing is divided into a first cavity for display components and a second cavity for computing components, physically separating the two functional areas to prevent heat transfer from high-power computing components to temperature-sensitive display components
Solution Approach 2:
The computing components are extracted from the display component housing and placed in a separate second cavity, removing the heat source away from the display components to enable independent thermal management
2Temperature
If a thermal separator wall is implemented to divide cavities, then temperature control of display components improves, but device complexity increases
Solution Approach 1:
The housing is segmented into two distinct cavities by a partition wall, creating physical separation between display and computing components while maintaining a unified overall structure
Solution Approach 2:
The partition wall acts as a thermal intermediary that blocks heat transfer between cavities while still allowing mechanical support and structural integrity of the housing
3Temperature
If air cooling system is added with inlets and outlets, then cooling effectiveness improves, but device complexity increases
Solution Approach 1:
The cooling system utilizes natural convection and ambient air flow through strategically placed inlets and outlets, allowing the device to cool itself without requiring active cooling mechanisms or external cooling infrastructure
Solution Approach 2:
The air cooling system serves multiple functions: it cools both the display cavity and computing cavity, provides structural support through the housing walls, and maintains a compact form factor without requiring additional cooling 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
This solution effectively maintains the display cavity temperature below 40 degrees Celsius and the electronics cavity temperature below 70 degrees Celsius, thereby preventing overheating and ensuring optimal performance of the wearable electronic device.
Implementation Method 1
The separator wall may include a thermal barrier and/or be formed of a material selected with desired thermal properties
Implementation Method 2
The display cavity may be cooled to at or below 40 degrees Celsius. In some cases, the electronics cavity may be cooled to at or below 70 degrees Celsius
Implementation Method 3
The separator wall may include a thermal barrier and/or be formed of a material selected with desired thermal properties
Data Source
AI summary
An electronic system is described that includes a headset device and associated cooling system. The headset device may be configured to physically separate high temperature components from other components of the headset device into multiple cavities. In some cases, the headset device may be divided into a display cavity and an electronics cavity to separate the display components from other components of the headset device.