Light Emitting Device Uniform Trace Arrangement
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Solution Overview
Problem
Conventional lighting apparatuses using light-concentrating devices suffer from color unevenness when projecting light onto walls and floors, resulting in suboptimal lighting quality.
Innovation Solution
A light emitting device with densely packed light emitting elements and a fluorescent material containing member, where the elements are arranged to merge their traces into a single trace or circle, ensuring uniform light distribution and reducing color unevenness when used with a light-concentrating device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light emitting elements are densely packed to increase luminous intensity, then light concentration improves, but color unevenness occurs when projected through light-concentrating devices
Solution Approach 1:
The patent applies local quality by varying the arrangement density of light emitting elements across different regions of the light emitting surface. Specifically, elements are arranged more densely at the center region and less densely at peripheral regions, creating non-uniform local distributions that compensate for optical path differences through the light-concentrating device, thereby eliminating color unevenness while maintaining high overall luminous intensity
Solution Approach 2:
The patent employs asymmetry by deliberately creating non-symmetric or radially asymmetric patterns in the light emitting element arrangement. The elements are positioned according to specific geometric patterns (such as triangular lattices or hexagonal patterns) that are asymmetric with respect to the optical axis, which helps distribute light uniformly in all directions and prevents the formation of color unevenness when projected through the light-concentrating device
2Ease of manufacture
If light emitting elements are arranged in a regular pattern, then manufacturing is simplified, but light distribution uniformity deteriorates when condensed
Solution Approach 1:
The patent applies segmentation by dividing the light emitting surface into multiple regions (center region and peripheral regions) with different element arrangement patterns. Each region is segmented into specific geometric units (such as triangular or hexagonal cells) that can be manufactured using standardized processes, while the overall segmented structure achieves the desired light distribution uniformity when condensed through the light-concentrating device
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 achieves high luminous intensity with narrow light distribution and eliminates color unevenness, providing excellent lighting quality when used with a light-concentrating device for condensing light.
Implementation Method 1
a plurality of light emitting elements 4 sealed with a fluorescent material containing member 6
Data Source
Figure 1
Figure 2(a)~2(d)
Figure 3
AI summary
Provided is a light emitting device (2) and a lighting apparatus having excellent lighting quality with using a light-concentrating device for condensing light. The light emitting device (2) includes a plurality of light emitting elements (4) sealed with a fluorescent material containing member (6). In a planar view of a light emitting surface, when the plurality of light emitting elements (4) is projected in a parallel direction, the traces of the upper surfaces of the plurality of the light emitting elements merge into a single trace (16a,16b, 16c, 16d).