Flexible-PCB LED Light Unit for Compact Spiral-Like Luminaires
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Solution Overview
Problem
Existing LED light units aimed at replacing incandescent bulbs lack an aesthetically appealing design while being cost-effective and efficient in assembly, particularly for luminaire applications.
Innovation Solution
A flexible printed circuit board (PCB) with elongated light sources arranged in a circular arc shape and attached to a carrier, creating a spiral-like appearance without the need for a continuous filament, using a compact structure that reduces space and manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a continuous LED filament is bent and arranged into a spiral shape, then a spiral-like appearance is achieved, but the assembly process becomes complex and costly
Solution Approach 1:
The invention divides the continuous LED filament into multiple separate elongated light sources, each mounted on its own flexible PCB segment. These segments are then arranged in a circular arc pattern around a central axis, creating the spiral-like appearance without requiring bending or complex assembly of a continuous filament. This segmentation simplifies manufacturing while achieving the desired aesthetic effect.
2Shape
If a true spiral structure is used to achieve spiral-like appearance, then aesthetic appeal is improved, but the space required increases
Solution Approach 1:
The invention transitions from a three-dimensional true spiral structure to a two-dimensional circular arc arrangement viewed from above. The elongated light sources are positioned radially around a central axis on a flat or substantially flat surface, creating the illusion of a spiral when viewed from the top while minimizing the actual space occupied. This dimensional transformation achieves the aesthetic effect with compact footprint suitable for flat luminaires.
3Use of energy by moving object
If LED light units are designed to replace incandescent bulbs, then operational efficiency is improved, but aesthetic appeal similar to traditional bulbs is lost
Solution Approach 1:
The invention copies the aesthetic appearance of traditional spiral filament bulbs by arranging LED light sources in a spiral-like pattern, while using modern LED technology for the actual light generation. The visual form mimics the classic incandescent bulb design, maintaining aesthetic appeal, while the LED components provide superior energy efficiency and operational characteristics.
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 provides a visually appealing spiral-like LED light unit suitable for flat luminaires with simplified assembly and reduced costs, enhancing the aesthetic appeal while maintaining efficiency.
Implementation Method 1
a flexible printed circuit board (PCB) having a first longitudinal axis
Implementation Method 2
the flexible PCB is subsequently at least partially attached to the carrier
Data Source
AI summary
The present invention describes a LED light unit (1) for providing LED light, the LED light unit (1) comprising a flexible printed circuit board (PCB) (2) having a first longitudinal axis (LA1) and a plurality of elongated light sources (3) each having a second longitudinal axis (LA2). The plurality of elongated light sources (3) is arranged on the flexible PCB (2) such that none of the second longitudinal axes (LA2) of the plurality of elongated light sources (3) is parallel to the first longitudinal axis (LA1) of the flexible PCB (2). The LED light unit further comprises a carrier (4), wherein the flexible PCB (2) is bent along the first longitudinal axis (LA1) such that each of the elongated light sources (3) is arranged in the shape of a substantially circular arc, and wherein the flexible PCB (2) is subsequently at least partially attached to the carrier (4).