Movable HMD Heat Dissipation via Segmented Graphite Cooling
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Solution Overview
Problem
Head-mounted displays (HMDs) face challenges in maintaining effective heat dissipation during interpupillary adjustment, leading to potential temperature rises due to obscured heat dissipation surfaces and noise from cooling units like fans.
Innovation Solution
An image display device with a movable observation optical system and a heat dissipation structure using graphite sheets and heat transfer parts that remain exposed and functional regardless of the lenses' position, ensuring stable heat dissipation across various interpupillary adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the observation optical system is made movable for interpupillary adjustment, then the adaptability to different users is improved, but the heat dissipation effectiveness deteriorates due to obscured heat dissipation surfaces
Solution Approach 1:
The heat dissipation structure is divided into multiple independent heat dissipation parts (first heat dissipation part, second heat dissipation part, third heat dissipation part) positioned at different locations. This segmentation ensures that when the observation optical system moves during interpupillary adjustment, at least one heat dissipation surface remains exposed and effective, resolving the contradiction between adjustability and heat dissipation performance.
2Temperature
If cooling units like fans are added to improve heat dissipation, then the temperature control is improved, but noise and device complexity increase
Solution Approach 1:
The invention extracts and eliminates the need for active cooling units like fans by utilizing passive heat dissipation through multiple strategically positioned heat dissipation surfaces. This approach maintains effective temperature control without introducing noise-generating mechanical components, resolving the contradiction between heat dissipation effectiveness and noise reduction.
3Adaptability or versatility
If the observation optical system is made movable for interpupillary adjustment, then the adaptability to different users is improved, but the device complexity increases
Solution Approach 1:
The heat dissipation structure is integrated into the existing casing and support structure of the observation optical system. The multiple heat dissipation parts are incorporated as integral components rather than separate additions, thereby providing adaptability through movable optical systems while minimizing increases in overall device complexity.
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 provides a comfortable and efficient heat dissipation system that maintains image quality and observer experience by ensuring consistent cooling regardless of the lenses' position, preventing unintended temperature rises.
Implementation Method 1
a heat transfer part connecting the first heat dissipation part and the second heat dissipation part so as to transfer heat between them
Implementation Method 2
a first heat dissipation part and a second heat dissipation part that are provided in the casing, positioned in opposite directions along the path with respect to the observation optical system, and configured to dissipate heat generated in the casing
Data Source
AI summary
An image display device includes an observation optical system configured to guide light toward the eyes of an observer, a casing supporting the observation optical system so as to be movable along a predetermined path, a first heat dissipation part and a second heat dissipation part that are provided in the casing, positioned in opposite directions along the path with respect to the observation optical system, and configured to dissipate heat generated in the casing. A heat transfer part connects the first heat dissipation part and the second heat dissipation part so as to transfer heat between them.