Series-Connected Light Emitting Regions with Variable Area Groups
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Solution Overview
Problem
Current light emitting devices face challenges in achieving high luminance and efficiency due to limitations in light extraction efficiency and reliability, particularly in the arrangement and connection of light emitting regions.
Innovation Solution
The light emitting device incorporates a structure with multiple light emitting regions connected in series, featuring distinct electrode units and intermediate pads, allowing for controlled light emission areas and improved connection efficiency through insulating and conductive layers, which enhances light extraction and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If multiple light emitting regions are connected in series with uniform areas, then current distribution is simplified, but light extraction efficiency and reliability are insufficient
Solution Approach 1:
The patent applies local quality by dividing light emitting regions into different groups (first group with first area, second group with second area) where each group has different area characteristics. This allows different regions to have optimized light extraction properties tailored to their specific functions, thereby improving overall reliability and light extraction efficiency while maintaining manageable current distribution through the series connection structure.
2Illumination intensity
If light emitting area is increased to achieve high luminance, then light extraction efficiency improves, but device complexity increases
Solution Approach 1:
The patent segments the light emitting structure into multiple distinct groups of light emitting regions arranged in series. The first group contains light emitting regions with a first area, while the second group contains light emitting regions with a second area. This segmentation allows the total light emitting area to be increased for high luminance output while maintaining organized structural complexity through systematic grouping and series connection, rather than using a single large unmanageable structure.
3Reliability
If series connection of light emitting regions is implemented, then current control is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent implements parameter changes by establishing distinct area parameters for different groups of light emitting regions (first area for first group, second area for second group). This parameter differentiation allows for optimized current control across series-connected regions while providing clear manufacturing specifications that guide precision requirements. The systematic parameter assignment simplifies the control process compared to uniform designs, as each group's parameters can be independently optimized and controlled during manufacturing.
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
This configuration increases the light emitting area, disperses current effectively, and improves light emission efficiency by uniformly distributing current across connected light emitting regions, thereby enhancing the overall performance and reliability of the device.
Implementation Method 1
at least one connection electrode to sequentially connect the light emitting regions in series
Implementation Method 2
a light emitting structure including a plurality of light emitting regions including a first semiconductor layer, an active layer and a second semiconductor layer
Implementation Method 3
a first electrode unit disposed on the first semiconductor layer in one of the light emitting regions; a second electrode unit disposed on the second semiconductor layer in another of the light emitting regions
Implementation Method 4
an insulating layer to electrically insulate the metal layers from each other
Data Source
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AI summary
Disclosed is a light emitting device including: a light emitting structure including a plurality of light emitting regions including a first semiconductor layer, an active layer and a second semiconductor layer; a first electrode unit disposed on the first semiconductor layer in one of the light emitting regions; a second electrode unit disposed on the second semiconductor layer in another of the light emitting regions; an intermediate pad disposed on the second semiconductor layer in at least still another of the light emitting regions; and at least one connection electrode to sequentially connect the light emitting regions in series, wherein the light emitting regions connected in series are divided into 1st to ith light emitting region groups and areas of light emitting regions that belong to different groups are different (where 1<i≤j, each of i and j is a natural number, and j is a last light emitting region group).