Retro LED Bulb U-Shaped Filament Illumination
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Solution Overview
Problem
Conventional LED light bulbs suffer from uneven illumination due to light being blocked by stems and are made of fragile glass, which poses safety risks during manufacturing.
Innovation Solution
A retro LED light bulb design featuring a transparent plastic lampshade and stem with a U-shaped LED filament supported by rigid conductive wires, eliminating light obstruction and using plastic materials to enhance safety and durability, along with a sealant for improved waterproofing and a threaded base for secure assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If LED filaments are mounted linearly or spirally on stems, then the structure is simple, but light is blocked by stems causing uneven illumination
Solution Approach 1:
The patent transitions from linear or spiral mounting in one dimension to a planar arrangement where LED filaments are distributed around the stem in a radial pattern. This dimensional change allows light to emit uniformly in all directions without being blocked by the stem, resolving the contradiction between illumination uniformity and structural simplicity.
Solution Approach 2:
The patent employs asymmetric radial distribution of LED filaments around the stem rather than symmetric linear or spiral patterns. This asymmetric arrangement optimizes light distribution by positioning LEDs at strategic angles around the stem, preventing stem obstruction while maintaining structural efficiency.
2Shape
If lampshades and stems are made of glass, then transparency is achieved, but the material is vulnerable and requires open-fire manufacturing
Solution Approach 1:
The patent changes the material parameter from glass to transparent plastic (such as PMMA or PC). This parameter change maintains the transparency property while fundamentally improving reliability, as plastic is more impact-resistant and can be manufactured using cold-forming injection molding processes, eliminating the need for open-fire sintering and associated safety risks.
Solution Approach 2:
The patent replaces the thermal-mechanical glass manufacturing process (requiring open-fire heating and sintering) with a cold-forming plastic injection molding process. This substitution eliminates the mechanical hazards of open-fire manufacturing while achieving the same transparent aesthetic effect.
3Ease of manufacture
If conventional LED bulbs use translucent lampshades, then manufacturing is simplified, but the appearance differs significantly from conventional bulbs
Solution Approach 1:
The patent changes the transparency parameter of the lampshade from translucent to fully transparent. This parameter change allows the internal LED filament structure to be visible, creating a retro aesthetic that resembles conventional incandescent bulbs while maintaining LED manufacturing simplicity through injection molding processes.
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 design provides uniform illumination, improves safety by eliminating the need for open-fire manufacturing, and enhances connection stability and waterproof performance.
Implementation Method 1
an LED filament fixedly connected to the rigid conductive wires
Implementation Method 2
the light emitted by the LED filament
Data Source
AI summary
The present invention provides a retro LED light bulb comprising a transparent lampshade and a base fixedly connected with the transparent lampshade. It further comprises a transparent stem inside the transparent lampshade, a power supply board fixedly mounted on the transparent stem, rigid conductive wires passing through the transparent stem and connecting to the power supply board, and an LED filament fixedly connected to the rigid conductive wires; the rigid conductive wires are two in number; the LED filament is in U-shape; two ends of the LED filament are respectively connected to the rigid conductive wires as one-to-one connection. Since the LED filament is supported by the rigid conductive wires, and the LED filament is bent into a U-shape, the light emitted by the LED filament will not be blocked by the stem easily, resulting in more uniform light and better illumination effect.