Circular LED Light Source for High Lumen Density
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Solution Overview
Problem
Conventional LED light source units with elongated rectangular shapes face challenges in achieving high lumen density and efficient space utilization, particularly in bulb-shaped lighting applications, due to gaps between units and inefficient internal space use.
Innovation Solution
A circular LED light source apparatus with a base and substrate of concentric circular shape, featuring a ring-shaped electrode pattern and pass-through hole for mounting LED elements, allowing for series and parallel connections to enhance light distribution and space efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If LED elements are arranged in a line on an elongated rectangular substrate, then the structure is simple and manufacturing is easy, but the lumen density is low and space utilization is inefficient
Solution Approach 1:
The patent transforms the traditional linear arrangement of LED elements into a circular configuration. The LED elements are arranged along a circumferential direction on a circular substrate, with their light emitting surfaces facing a central axis. This circular geometry increases the packing density of LED elements while maintaining manufacturing simplicity, thereby resolving the contradiction between ease of manufacture and lumen density.
Solution Approach 2:
The patent transitions from a one-dimensional linear arrangement to a two-dimensional circular configuration. By arranging LED elements along the circumferential direction and orienting their light emitting surfaces toward the central axis, the design utilizes radial and circumferential dimensions simultaneously, increasing the effective light emitting area and lumen density without complicating the manufacturing process.
2Ease of operation
If multiple elongated rectangular LED light source units are aligned to form a square shape, then optical design becomes easier, but gaps occur between units and space efficiency deteriorates
Solution Approach 1:
The patent replaces the square-shaped compound light source unit with a circular configuration. The LED elements are arranged circularly with light emitting surfaces facing the central axis, creating a compact circular light source. This eliminates gaps between units when arranged in arrays, improving space efficiency while maintaining optical design simplicity through the symmetry of the circular geometry.
Solution Approach 2:
The patent integrates all LED elements into a single circular configuration on one substrate, rather than using multiple separate rectangular units. This merging approach eliminates the gaps that occur between discrete units when aligned to form square shapes, thereby improving space efficiency while maintaining ease of optical design through the unified circular symmetry.
3Reliability
If LED elements are mounted on a substrate with electrode patterns, then electrical connection is achieved, but the substrate occupies space that could be used for mounting more LED elements
Solution Approach 1:
The patent segments the substrate into functional zones: a central region with electrode patterns for electrical connection and a circumferential region for mounting LED elements. The electrode patterns are positioned at the center while LED elements are arranged along the circumferential direction, allowing both electrical connection and high-density mounting without significant space conflict.
Solution Approach 2:
The patent utilizes the radial dimension of the circular substrate to resolve space constraints. electrode patterns are placed at the center while LED elements are mounted along the circumferential direction at a radius from the center. This radial-circumferential arrangement allows both electrical connection infrastructure and high-density LED mounting to coexist effectively, increasing the number of mountable LED elements.
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 enables a high lumen density, compact, and efficiently designed LED light source with uniform light emission and improved heat dissipation, suitable for bulb-shaped lighting, while minimizing wasted space and optimizing optical design.
Implementation Method 1
a base (2) having an upper surface, a lower surface opposite the upper surface, and a peripheral edge side surface provided between edges of the upper surface and the lower surface, and having thermal conductivity
Data Source
AI summary
An LED light source apparatus comprises a circular base having thermal conductivity, an insulative substrate concentric with the base and including a pass-through hole provided to pass through an upper surface and a lower surface of the substrate, at least one mounting area formed having a central portion of an upper surface of the base exposed from the pass-through hole of the substrate, and a plurality of LED elements mounted on the mounting area and electrically connected to electrodes provided on the upper surface of the substrate, the pass-through hole being formed in a circular shape concentric with the base and the substrate.