LED Light Bulb With Removable Substrate for Longer Service Life
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Solution Overview
Problem
Existing LED light bulbs do not allow for easy replacement of substrates with malfunctioning light emitting members, leading to potential waste and reduced bulb lifespan.
Innovation Solution
A light bulb design featuring a removable substrate with electrical and thermal contact members that secure and connect the substrate to the main body, allowing for easy replacement and thermal management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If the substrate is made non-removable in traditional LED light bulbs, then the structural integrity and electrical connection are maintained, but the bulb lifespan is reduced and waste increases when the light emitting member malfunctions
Solution Approach 1:
The light bulb is divided into separable components: a removable substrate containing light emitting members and a reusable main body. This segmentation allows the substrate to be replaced independently when light emitting members malfunction, extending the overall bulb lifespan without requiring disposal of the entire bulb assembly.
Solution Approach 2:
The substrate with light emitting members is extracted as a separate replaceable module from the main body. This extraction enables users to remove and replace only the malfunctioning substrate while retaining the functional main body, directly addressing the contradiction between extending bulb life and maintaining ease of replacement.
2Reliability
If the substrate is made removable to allow replacement, then bulb lifespan is extended and waste is reduced, but the device complexity increases due to additional contact members and securing mechanisms
Solution Approach 1:
Multiple functions are merged into the electrical contact members: they provide both electrical connection to power the light emitting members and mechanical securing to retain the substrate in position. This merging reduces the need for separate components, thereby limiting the increase in device complexity while maintaining replacement capability.
Solution Approach 2:
The electrical contact members serve multiple purposes: electrical conduction, mechanical retention, and potential thermal management. This multi-functionality allows the substrate replacement mechanism to achieve reliability without proportionally increasing device complexity, as single components perform multiple roles.
3Ease of operation
If electrical contact members are used to secure the substrate, then the substrate is retained in position and electrical connection is established, but thermal management challenges arise due to conductive heat transfer
Solution Approach 1:
The electrical contact members act as intermediary components between the substrate and the main body, facilitating both electrical connection and thermal transfer. By designing these contact members with appropriate thermal properties and connection geometry, the patent balances the need for mechanical retention with thermal management requirements.
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
Enables prolonged bulb life by allowing for substrate replacement, simplifies construction, and reduces environmental waste by enabling component-specific maintenance.
Implementation Method 1
the electrical contact members may thermally connect the substrate with a heat sink provided in the light bulb
Implementation Method 2
A light-emitting diode (LED) is a semiconductor light source that emits light when activated
Data Source
AI summary
An LED light bulb comprises a substrate having an LED provided thereon and a main body in which the substrate is removably received. The main body comprises electrical contact members and the substrate has a biasing member which secures the substrate in position in the main body.