Twisted LED Filament Structure for Omnidirectional Light and Heat Dissipation
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Solution Overview
Problem
Existing LED lamps face challenges in achieving 360-degree illumination while meeting heat dissipation requirements, and lack functionality beyond basic lighting.
Innovation Solution
An LED filament design featuring twisted, ring-shaped substrate sections with opposite light-emitting surfaces, allowing for omnidirectional illumination and improved heat dissipation through a twisted filament structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If LEDs are arranged within a plane to meet heat dissipation requirements, then heat dissipation is improved, but light emitting area is limited to 180-degree rather than 360-degree
Solution Approach 1:
The patent transitions from planar LED arrangement (2D) to three-dimensional spatial arrangement by twisting substrate sections at different angles. The substrate sections are arranged in multiple layers with twisting angles of 0°, 45°, 90°, 135°, enabling LEDs to emit light in omnidirectional patterns while maintaining effective heat dissipation pathways through the twisted structure.
Solution Approach 2:
The filament is divided into multiple substrate sections that can be independently arranged and twisted at different angles. Each substrate section contains LED chips arranged in specific patterns, and the sections are connected in series. This segmentation allows each section to be optimized for both heat dissipation and light emission in specific directions, collectively achieving 360-degree illumination.
2Ease of manufacture
If traditional tube-shaped LED lamp structure is used, then manufacturing is simplified, but omnidirectional illumination cannot be achieved
Solution Approach 1:
The patent introduces dynamic spatial arrangement by twisting substrate sections at varying angles along the filament length. Instead of a static planar arrangement, the substrate sections are rotated at 0°, 45°, 90°, and 135° angles, creating a dynamic three-dimensional light emission pattern that achieves omnidirectional illumination while maintaining a flexible filament structure suitable for manufacturing.
3Device complexity
If LED chips are arranged in a single row on carrier element, then device complexity is reduced, but heat dissipation performance is insufficient
Solution Approach 1:
The patent arranges LED chips in multiple rows on each substrate section rather than a single row. The first and second rows of LED chips are positioned at different locations on the substrate section, with different emitting directions. This multi-row arrangement increases the effective light emitting area and improves heat dissipation by distributing heat sources across multiple locations while maintaining relatively simple manufacturing 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 enables easy manufacturing, high yield, and uniform omnidirectional light emission with enhanced heat dissipation, supporting multiple light-emitting effects and color control.
Implementation Method 1
LED light-emitting elements are arranged on the light-emitting surfaces
Implementation Method 2
improved heat dissipation through a twisted filament structure
Data Source
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AI summary
An LED filament including at least one filament substrate. The at least one filament substrate each includes at least two substrate sections connected in sequence. The substrate has two opposite light-emitting surfaces. The light-emitting surfaces of adjacent substrate sections are twisted with respect to each other around the axis which is along the extending direction of the filament substrate. On the light-emitting surfaces LED light-emitting elements are provided. The LED filament structure can facilitate heat dissipation and comprises a plurality of light-emitting surfaces oriented in different directions, so that the LED filament can emit light toward a plurality of angles so as to have a more uniform and omni-directional light-emitting effect. In addition, the LED light-emitting elements on the plurality of filaments can also be electrically connected in different manners, such that LED light-emitting elements of different colors can be provided, thereby realizing the control of multiple light-emitting effects.