HMD Display Panel Heat Exchanger With Bent Wings
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Solution Overview
Problem
Head mounted display devices (HMDs) face challenges in efficiently dissipating heat generated by the display panel, which can lead to discomfort and potential damage due to high operating temperatures.
Innovation Solution
A head mounted display device with a heat exchanger attached to the back surface of the display panel, featuring a center portion and multiple wings with heat pipes and a working fluid that transfers heat away from the panel through convection and radiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heat exchanger is attached to the back surface of the display panel, then heat dissipation efficiency is improved, but device complexity increases
Solution Approach 1:
The heat pipes are nested within the wings structure, with the working fluid contained inside the heat pipe channels. This nesting approach allows the heat exchanger functionality to be integrated within the existing wing framework, improving heat dissipation without proportionally increasing overall device complexity
Solution Approach 2:
The wings serve multiple functions: they provide structural support for the display panel and simultaneously act as heat dissipation components through integrated heat pipes. This multi-functionality allows the same structure to fulfill both mechanical and thermal management roles, improving heat dissipation efficiency while minimizing additional complexity
2Power
If multiple wings with heat pipes are used, then heat transfer capability is improved, but manufacturing complexity increases
Solution Approach 1:
The heat exchanger is segmented into multiple wings with heat pipes distributed across them. This segmentation allows heat to be transferred through multiple parallel pathways, enhancing overall heat transfer capability. The modular wing structure also enables standardized manufacturing processes for each wing unit
Solution Approach 2:
The working fluid volume ratio is optimized to 20%-50% of the total heat pipe volume, and the wings are bent at specific angles to optimize heat transfer efficiency. These parameter optimizations ensure effective heat dissipation while maintaining manufacturability through controlled variations in fluid volume and geometric parameters
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 heat exchanger effectively dissipates heat generated by the display panel, maintaining user comfort and protecting the device by efficiently releasing heat to the outside.
Implementation Method 1
The heat exchanger includes a center portion, and a plurality of wings bent from the center portion. The internal space of the center portion and the plurality of wings may include a heat pipe
Implementation Method 2
The working fluid may include a liquid and an air layer
Implementation Method 3
a working fluid within the heat pipe that, in operation, transfers heat away from the display panel. The working fluid may include a liquid and an air layer
Implementation Method 4
efficiently releasing heat to the outside
Data Source
AI summary
A head mounted display device is disclosed that includes a display panel, and a heat exchanger attached to a back surface of the display panel to transfer heat away from the display panel. The heat exchanger includes a center portion, and a plurality of wings bent from the center portion.