Irreversible Hydrogen Dispenser for LED Thermal Management
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Solution Overview
Problem
The challenge is to achieve precise and controlled hydrogen filling in LED light bulbs for effective thermal management without the safety risks associated with hydrogen gas, particularly in sealed bulbs that may rupture and mix with external oxygen.
Innovation Solution
An irreversible hydrogen dispenser method using specific active materials like LiH, NaH, MgH2, and their sub-stoichiometric compounds, along with TiH2 and ZrH4, is employed, ensuring that at least 90% of the hydrogen is irreversibly released and maintained within safe pressure ranges (10-50 mBar) to prevent excessive hydrogen accumulation and ensure thermal dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If hydrogen gas is used for thermal management in LED bulbs, then thermal conductivity is improved, but safety risks increase due to potential rupture and mixing with external oxygen
Solution Approach 1:
The patent introduces an intermediary substance (hydrogen gas) that facilitates thermal management while being contained within a sealed bulb structure. The intermediary enables heat transfer from LED to heat sink without direct exposure to the external environment, thus maintaining safety while achieving thermal control
Solution Approach 2:
The patent creates an inert or controlled atmosphere within the sealed bulb by filling it with hydrogen gas at specific pressures. This isolated environment prevents hydrogen from mixing with external oxygen, eliminating safety risks while maintaining the thermal management benefits of hydrogen's high thermal conductivity
2Temperature
If hydrogen concentration is increased for better thermal dissipation, then thermal management is improved, but hazardous levels are reached
Solution Approach 1:
The patent applies parameter changes by precisely controlling the hydrogen gas pressure within a specific range (10-50 mbar). This parameter optimization ensures sufficient hydrogen concentration for effective thermal dissipation while staying below hazardous thresholds. The specific pressure range balances thermal performance with safety requirements
3Temperature
If precise hydrogen dosage is implemented, then thermal management is optimized, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-filling the bulb with hydrogen gas at the optimal pressure range (10-50 mbar) during the manufacturing process. This preliminary dosing ensures that the correct hydrogen concentration is established before the product reaches the user, optimizing thermal management without requiring complex dosage control mechanisms during operation
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 method allows for precise hydrogen dosage, ensuring efficient thermal management within LED light bulbs while minimizing safety hazards by maintaining the hydrogen concentration below hazardous levels and maintaining the desired pressure range, thus enhancing the bulb's operational safety and performance.
Implementation Method 1
a step of heating an irreversible hydrogen dispenser containing at least an active material for hydrogen release
Implementation Method 2
filling gas having high thermal conductivity so that the presence of a specific heat sink is not necessary
Implementation Method 3
its lower viscosity makes the convective mechanisms more effective in thermal dissipation
Data Source
AI summary
Method for the irreversible dosage of hydrogen in LED light bulbs by means of heating an irreversible hydrogen dispenser containing at least an active material for hydrogen release.