Deformable Heat Transfer Member for Head-Mounted Display Thermal Management
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Solution Overview
Problem
Head-mounted displays face challenges in efficiently radiating heat from light sources while maintaining positional accuracy, especially with downsizing and weight reduction, due to rigid fixation of heat-generating spots and heat radiation portions.
Innovation Solution
A display apparatus featuring a deformable heat-transfer member connected between the heat source and casing, allowing for efficient heat radiation and absorption of external forces, ensuring positional accuracy and facilitating adjustment of the light source or image display portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a rigid heat transfer member is used to efficiently radiate heat from the light source, then heat radiation performance is improved, but positional accuracy of the light source deteriorates due to inability to absorb external forces
Solution Approach 1:
The heat transfer member changes its physical state from rigid to flexible, allowing it to deform and absorb external forces while maintaining thermal contact. This parameter change enables the member to simultaneously achieve good heat radiation performance and positional accuracy by adapting to external forces through elastic deformation rather than rigid resistance
Solution Approach 2:
The patent employs a flexible heat transfer member that can deform under external forces. This flexible structure allows the member to maintain intimate thermal contact with the light source while absorbing mechanical stresses, thereby preventing displacement of the light source and maintaining positional accuracy without compromising heat radiation efficiency
2Manufacturing precision
If the light source is rigidly fixed to the casing for stable positioning, then positional accuracy is improved, but external forces cannot be absorbed and the structure becomes complex
Solution Approach 1:
The patent extracts the shock absorption function from the rigid fixation structure and assigns it to the flexible heat transfer member. By separating the thermal conduction function from the mechanical support function, the design eliminates the need for complex shock-absorbing components while maintaining positional accuracy through the inherent flexibility of the heat transfer member
Solution Approach 2:
The flexible heat transfer member serves multiple functions simultaneously: it acts as a thermal conduction path for heat radiation, a shock absorber for external forces, and a positioning element for the light source. This multi-functionality simplifies the overall structure by eliminating the need for separate components for each function
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
Enhances heat radiation performance, maintains positional accuracy, and supports downsizing and weight reduction of the display apparatus by using a deformable heat-transfer member, such as a carbon-based sheet, which can be folded for improved assembly workability.
Implementation Method 1
The heat-transfer member includes a first end connected to the heat source, a second end connected to an inner surface of the casing
Data Source
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AI summary
[Object] To provide a display apparatus capable of obtaining excellent heat radiation performance of a light source while ensuring positional accuracy of the light source. [Solving Means] A display apparatus according to an embodiment of the present technology includes a light guide portion, a casing, a projection portion, a heat source, and a heat-transfer member. The light guide portion is disposed in front of eyes of a user. The casing is fixed to the light guide portion. The projection portion is housed in the casing and is configured to be capable of projecting an image to the light guide portion. The heat-transfer member includes a first end and a second end, the first end being connected to the heat source, the second end being connected to an inner surface of the casing, and is configured to be deformable.