Light Emitting Device with Segmented Electrodes for Individual Control
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Solution Overview
Problem
Conventional light emitting devices face limitations in light extraction efficiency and the ability to individually drive multiple light emitting structures within a single device, leading to size constraints and reduced light output.
Innovation Solution
A light emitting device comprising multiple light emitting structures with distinct semiconductor layers and electrodes, allowing for individual control and enhanced light extraction through reflective and ohmic contact layers, and a light unit with an optical member to improve light extraction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple light emitting structures are integrated into a single device, then light output and functionality are enhanced, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The device is divided into multiple independent light emitting structures (first light emitting structure and second light emitting structure), each with its own semiconductor layers and electrodes. This segmentation allows each structure to be independently controlled and optimized, enabling enhanced light output while maintaining manageable complexity through modular design
Solution Approach 2:
The device integrates multiple light emitting structures that can be individually driven and controlled, providing multi-functionality within a single device. Each structure can emit light independently, allowing for varied lighting patterns, colors, or intensities from different regions of the same device, thereby enhancing overall productivity and versatility
2Productivity
If multiple light emitting structures are integrated into a single device, then light output is enhanced, but the device size increases
Solution Approach 1:
Multiple light emitting structures are integrated within a single device housing or substrate, with each structure nested or arranged in a compact configuration. The first and second light emitting structures share common elements such as the substrate and packaging structure, allowing enhanced light output without proportionally increasing the overall device footprint
Solution Approach 2:
The light emitting structures are arranged in a vertical or layered configuration rather than a simple horizontal expansion. By stacking or vertically arranging the first and second light emitting structures, the device achieves enhanced light output in a compact three-dimensional layout, preventing excessive increase in device area
3Ease of operation
If multiple light emitting structures are individually driven, then control flexibility and light extraction efficiency are improved, but electrode complexity and manufacturing difficulty increase
Solution Approach 1:
The electrode system is segmented into multiple independent electrodes (first electrode, second electrode, third electrode) that can be independently connected to control different light emitting structures. This segmentation enables flexible individual control of each structure while maintaining a manageable electrode architecture that can be manufactured using standard semiconductor fabrication techniques
Solution Approach 2:
The patent introduces intermediate connection structures and conductive layers that facilitate individual control of multiple light emitting structures. These intermediary elements simplify the connection between control circuits and multiple light emitting structures, reducing manufacturing complexity by providing standardized interfaces and connection points
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 improved light extraction efficiency and individual driving of multiple light emitting structures within a compact device, overcoming size limitations and enhancing light output for applications such as vehicle lighting.
Implementation Method 1
a reflective layer disposed under the first light emitting structure and under the second light emitting structure
Implementation Method 2
The LED converts electrical signals into the form of light such as infra-red light, ultra-violet light, and visible light by using the characteristic of a compound semiconductor
Data Source
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AI summary
Disclosed is a light emitting device including a plurality of light emitting structures (10, 20), which improve light extraction efficiency and are individually driven, a light emitting device package, and a light unit. The light emitting device may include first and second light emitting structures (10, 20). The first light emitting structure (10) may include a first conductive first semiconductor layer (11), a first active layer (12) under the first conductive first semiconductor layer (11), and a second conductive second semiconductor (13) under the first active layer (12). The second light emitting structure (20) may include a first conductive third semiconductor layer (21), a second active layer (22) under the first conductive third semiconductor layer (21), and a second conductive fourth semiconductor layer (23) under the second active layer (22). A first electrode(81) electrically connected to the second conductive second semiconductor under the first light emitting structure; a second electrode(82) electrically connected to the second conductive fourth semiconductor layer under the second light emitting structure; a third electrode(83) electrically connected to the first conductive first semiconductor layer and the first conductive third semiconductor layer ; a first pad(91) electrically connected to the first electrode; and a second pad(92) electrically connected to the second electrode.