Vacuum-Sealed LED Bulb With Gas-Filled Thermal Management
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Solution Overview
Problem
Current LED light bulbs face challenges in high costs, low luminescent efficiency, short lifespan, and heat dissipation issues due to the use of expensive heat sinks and inefficient drivers, as well as limitations in emitting 4π light, which reduces their effectiveness compared to incandescent and fluorescent lamps.
Innovation Solution
A vacuum-sealed LED light bulb design using a gas with low viscosity and high thermal conductivity, such as He or He/H2, to facilitate convective heat dissipation, combined with transparent substrates and high-voltage LED chips connected in series to enhance luminescent efficiency and reduce costs, while eliminating the need for metal heat sinks and complex drivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a metal heat sink is used to dissipate heat from LED, then heat dissipation is improved, but cost and weight increase significantly
Solution Approach 1:
The patent uses a gas-filled bulb (nitrogen or other inert gas) to dissipate heat from the LED through convection and conduction, replacing the traditional metal heat sink. The gas acts as a thermal management medium that can be contained within the bulb structure, eliminating the need for external metal heat dissipation components.
Solution Approach 2:
The bulb structure serves multiple functions: it contains the LED, provides the light transmission path, and acts as a heat dissipation system through the gas filling. This multi-functionality eliminates the need for separate metal heat sink components, reducing overall weight while maintaining effective thermal management.
2Temperature
If a metal heat sink is used to dissipate heat from LED, then heat dissipation is improved, but cost increases
Solution Approach 1:
The gas-filled bulb replaces expensive metal heat sinks with a simpler, more cost-effective thermal management solution. The gas can be introduced during the bulb manufacturing process, and the bulb structure itself serves as the heat dissipation system, eliminating the need for additional metal components and reducing manufacturing complexity.
Solution Approach 2:
The bulb structure is designed to perform multiple functions including light transmission, electrical insulation, and heat dissipation. This integration eliminates the need for separate expensive metal heat sink components, reducing material costs and manufacturing complexity while maintaining effective thermal management.
3Illumination intensity
If a reflective layer or heat sink is placed at one side of the PN junction, then light concentration is improved, but luminescent efficiency decreases
Solution Approach 1:
The patent changes the optical parameters of the system by filling the bulb with gas having specific refractive index properties. This creates optimal light extraction conditions without requiring reflective layers that would block or redirect light, thereby maintaining high luminescent efficiency while achieving adequate light concentration in the desired direction.
Solution Approach 2:
The gas filling acts as an intermediary medium between the LED PN junction and the external environment. It facilitates light extraction and directional control through its optical properties without requiring reflective surfaces, thus maintaining high luminescent efficiency while achieving the desired light concentration effect.
4Reliability
If a driver with transformer and constant-current device is used, then LED control is improved, but cost and complexity increase
Solution Approach 1:
The patent extracts and eliminates the transformer and constant-current device from the traditional LED driver system. By using the gas-filled bulb structure and appropriate LED configuration, the system achieves reliable LED control without these complex components, simplifying the overall device architecture while maintaining control reliability.
Solution Approach 2:
The gas-filled bulb structure and LED arrangement are designed to provide inherent current regulation and control functions that traditionally required separate driver components. This multi-functionality eliminates the need for complex transformer-based drivers, reducing device complexity while maintaining reliable LED operation.
5Reliability
If a driver with transformer and constant-current device is used, then LED control is improved, but cost increases
Solution Approach 1:
The patent removes the expensive transformer and constant-current device from the driver system, replacing them with a simpler control approach that uses the gas-filled bulb structure and LED configuration to achieve reliable control at lower cost.
Solution Approach 2:
The simplified driver design leverages the multi-functional gas-filled bulb structure to provide inherent control characteristics, eliminating the need for expensive transformer-based constant-current devices while maintaining reliable LED operation and reducing manufacturing costs.
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 solution significantly increases luminescent efficiency, reduces costs, and extends the lifespan of LED light bulbs, making them more competitive with incandescent and fluorescent lamps, while ensuring safety and reliability by eliminating the need for metal heat sinks and complex drivers.
Implementation Method 1
a vacuum sealed chamber, which is filled with a gas having a low coefficient of viscosity and a high coefficient of thermal conductivity, the bracket and the LED light emitting strip fixed on the bracket are housed in the vacuum sealed chamber
Implementation Method 2
A vacuum-sealed LED light bulb design using a gas with low viscosity and high thermal conductivity, such as He or He/H2, to facilitate convective heat dissipation
Data Source
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AI summary
The present invention discloses a LED light bulb, comprising: a LED light bulb shell; a core column with an exhaust tube and a bracket; at least one LED light emitting strip with LED chips therein emitting 4π light; a driver; and an electrical connector, wherein the LED light bulb shell is vacuum sealed with the core column so as to form a vacuum sealed chamber, which is filled with a gas having a low coefficient of viscosity and a high coefficient of thermal conductivity, the bracket and the LED light emitting strips fixed on the bracket are housed in the vacuum sealed chamber, the LED light emitting strip is in turn electrically connected to the driver, the electrical connector, while the electrical connector is used to be electrically connected to an external power supply, so as to light the LED light emitting strips. In addition, the present invention also provides the LED light emitting strips with LED chips emitting 4rr light, as used in the LED light bulb.