Head-Mounted Display Fan Layout for Compact Cooling
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Solution Overview
Problem
Existing head-mounted displays (HMDs) face challenges in reducing size while maintaining high performance and functionality due to the limitations of small fans, which compromise cooling capability.
Innovation Solution
The HMD design includes two cameras and displays arranged in the left-right direction, with fans positioned between them, and inlet/outlet ports on the front surface, allowing for effective cooling and reducing the device's thickness and size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the size of the HMD is decreased, then the portability and comfort are improved, but the cooling capability deteriorates due to smaller fan size
Solution Approach 1:
The patent transitions from conventional lateral fan placement to a front-surface configuration where fans are positioned between the cameras as viewed from the front. This dimensional repositioning allows the fans to operate effectively within the limited space of a compact HMD while maintaining adequate cooling performance through optimized airflow paths from front surface inlet/outlet ports.
Solution Approach 2:
The fans are nested within the space between the two cameras on the front surface, utilizing the available volume efficiently. This nesting approach allows the cooling system to be integrated into the compact HMD structure without adding external bulk, thereby maintaining small overall device dimensions while providing sufficient cooling capacity.
2Adaptability or versatility
If high performance functions are added to the HMD, then the functionality is improved, but the power consumption and temperature rise increase
Solution Approach 1:
The heat-generating components (processing board and cameras) are extracted and positioned on the front-surface side separate from the displays on the rear-surface side. This spatial separation allows the cooling system to target specific heat sources effectively, managing temperature rises from high-performance components without compromising overall device functionality.
Solution Approach 2:
The patent employs a layered spatial arrangement where processing components and cameras are positioned on the front-surface side while displays are on the rear-surface side. This dimensional separation creates dedicated cooling zones, allowing efficient thermal management of high-performance components through the front-surface fan configuration while maintaining full functionality.
3Temperature
If fans are positioned to cool the processing board effectively, then the temperature control is improved, but the device complexity increases
Solution Approach 1:
The cooling function is merged with the front surface structure by positioning the fans between the cameras on the front surface, rather than as a separate lateral component. This integration achieves effective temperature control of the processing board while avoiding additional structural complexity, as the fans utilize the existing space between optical 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 configuration enables both a reduction in size and enhanced performance by effectively cooling the processing board, maintaining high functionality and reducing weight.
Implementation Method 1
a plurality of fans 150, and one or more inlet and outlet ports 130. The plurality of fans 150 are disposed between the two cameras 110 as viewed from the front-surface side
Data Source
AI summary
A display device includes two cameras that are arranged in a left-right direction and capture a front-surface side of the display device, a processing board, two displays that are arranged in the left-right direction and display images on a rear-surface side of the display device, a plurality of fans, and one or more inlet and outlet ports, wherein the processing board and the two cameras are disposed on the front-surface side with respect to the two displays, the plurality of fans are disposed on the front-surface side with respect to the processing board, the plurality of fans are disposed between the two cameras as viewed from the front-surface side, and a surface, on the rear-surface side, of each of the two cameras is disposed on the rear-surface side with respect to a surface, on the front-surface side, of each of the plurality of fans.