Removable Processing Cartridge for HMD Weight and Heat Management
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Solution Overview
Problem
Head-mountable displays (HMDs) face challenges in balancing user comfort with performance and functionality, particularly due to weight distribution and heat dissipation issues.
Innovation Solution
A deployable processing cartridge for HMDs, which includes a housing with a processor, battery, and fan, and features a removable attachment interface that allows the cartridge to be inserted into a slot on the HMD, providing improved airflow and weight distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electrical components are added to improve performance and functionality, then device capability is enhanced, but weight increases and user comfort deteriorates
Solution Approach 1:
The patent divides the HMD into two separable parts: a lightweight display unit and a removable processing cartridge containing electrical components (processor, battery, fan). This segmentation allows users to attach the cartridge only when full functionality is needed, thereby improving performance adaptability while minimizing weight during normal wear.
2Volume of moving object
If device size is reduced to improve form factor, then portability is enhanced, but heat dissipation capability deteriorates
Solution Approach 1:
The patent addresses heat dissipation by extending the cooling solution to a separate dimension - the removable processing cartridge contains its own fan and thermal management system. This allows the compact display unit to maintain small size while the cartridge provides adequate cooling when attached, solving the heat dissipation problem without compromising form factor.
3Weight of moving object
If processing cartridge is removed to reduce weight, then user comfort is improved, but device complexity increases
Solution Approach 1:
The processing cartridge is designed as a universal module that can be attached and detached to provide different levels of functionality. The cartridge contains all necessary processing, power, and cooling components in an integrated package, allowing the system to operate in multiple modes (full functionality with cartridge, basic display without cartridge) without requiring separate systems for each mode.
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 deployable cartridge reduces the weight of the HMD on the user's head, enhances comfort, and improves heat dissipation through onboard fans and passive airflow when removed.
Implementation Method 1
The cartridge can include a fan, wherein, when the cartridge is attached to the HMD, the fan can be positioned proximate a component disposed in the internal volume of the HMD to provide an airflow to the internal volume
Implementation Method 2
The attachment interface can include at least one of a mechanical coupler or a magnetic coupler
Data Source
AI summary
A cartridge including a housing, a processor positioned within the housing to provide video output to a display unit of a head-mounted display (HMD), and an attachment interface configured to removably attach the cartridge to the display unit.