LED Device with Variable Cell Spacing for Luminous Efficacy
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Solution Overview
Problem
Existing light emitting devices face challenges in achieving high luminance due to limitations in light extraction efficiency, particularly in the arrangement and spacing of light emitting cells which affect the overall luminous efficacy.
Innovation Solution
The light emitting device incorporates a unique arrangement where the separation distance between adjacent light emitting cells is varied, with a smaller first separation distance between cells not connected by a connection wire and a larger second separation distance between cells connected by a wire, optimizing the area and efficiency of light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the separation distance between adjacent light emitting cells is reduced to increase the light emitting area, then luminous efficacy is improved, but the risk of electrical short circuit between adjacent cells increases
Solution Approach 1:
The patent applies local quality by differentiating the separation distances for different groups of adjacent light emitting cells. First adjacent cells (without connection wires between them) have a smaller first separation distance to maximize area, while second adjacent cells (with connection wires) have a larger second separation distance to prevent short circuits. This localized differentiation resolves the contradiction by optimizing each region's separation distance according to its specific electrical connection requirements.
Solution Approach 2:
The patent introduces asymmetry by setting unequal separation distances for different groups of adjacent light emitting cells. Instead of using a uniform separation distance, the design employs a first separation distance for cells without connecting wires and a second separation distance for cells with connecting wires, where the two distances are deliberately different. This asymmetric approach allows the system to simultaneously achieve compact area utilization and reliable electrical insulation.
2Illumination intensity
If the area of light emitting cells is increased to improve luminous intensity, then luminous efficacy is enhanced, but the device area and complexity increase
Solution Approach 1:
The patent applies segmentation by dividing the light emitting device into multiple discrete light emitting cells arranged in an array. Each cell is a separate functional unit with its own semiconductor layers and electrodes. This segmentation allows the total light emitting area to be increased by adding more cells rather than enlarging individual cells, thereby improving luminous intensity while maintaining a compact overall device footprint through optimized cell spacing.
Data Source
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AI summary
A light emitting device is disclosed. The light emitting device includes a substrate, a plurality of light emitting cells disposed on the substrate to be spaced apart from each other, and a connection wire electrically connecting adjacent ones of the light emitting cells, wherein a first separation distance between first adjacent light emitting cells that are not connected by the connection wire among the light emitting cells is smaller than a second separation distance between second adjacent light emitting cells connected by the connection wire among the light emitting cells.