Rod-Type LED Electrode Overlap for Durable Display Light Emission
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Solution Overview
Problem
Current light emitting diode (LED) technologies face challenges in achieving efficient light emission and durability, particularly in micro-scale or nano-scale rod-type LEDs used in display devices, where structural and electrical design limitations affect performance and reliability.
Innovation Solution
A light emitting device design featuring a rod-type LED with a substrate, partition walls, electrodes, and insulating layers, where the electrodes are strategically positioned to enhance light emission efficiency and durability, and a display device incorporating this design with a pixel circuit and color filter layer to improve light output and reduce external light reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If electrodes are positioned to overlap partition walls, then light emission efficiency is improved, but device complexity increases
Solution Approach 1:
The electrode and partition wall are merged into a single integrated structure, where the partition wall serves dual functions as both a physical separator and an electrode component. This integration eliminates the need for separate electrode structures, thereby improving light emission efficiency while avoiding additional device complexity.
Solution Approach 2:
The partition wall is designed to perform multiple functions simultaneously: it acts as a physical barrier to define pixel boundaries, provides electrical conduction through its integrated electrode structure, and serves as a reflective surface to enhance light extraction. This multi-functionality resolves the contradiction by achieving improved light emission without adding separate components.
2Productivity
If rod-type LED size is reduced to micro or nano scale, then productivity is improved, but reliability deteriorates
Solution Approach 1:
The rod-type LED is encapsulated in a protective shell or coating that provides mechanical strength and environmental protection. This thin film structure allows the LED to maintain its micro or nano scale dimensions for high productivity while the protective shell ensures sufficient durability and reliability for practical applications.
Solution Approach 2:
The rod-type LED structure utilizes composite materials that combine the semiconductor core with protective and functional layers. This composite approach enables the miniaturized LED to achieve both the small size required for high productivity and the enhanced mechanical and environmental stability needed for reliability.
3Illumination intensity
If color filter layer is added to minimize external light reflection, then image quality is improved, but device complexity increases
Solution Approach 1:
The color filter layer is integrated with other display device layers to form a unified structure. By merging the color filtering function with existing structural elements, the patent achieves improved image quality while minimizing the increase in device complexity through shared components and streamlined architecture.
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 proposed design enhances light emission efficiency and durability of rod-type LEDs, improving the performance and image quality of display devices by optimizing electrode placement and using a color filter layer to minimize external light reflection.
Implementation Method 1
a light emitting element provided on the substrate, and the light emitting element having a first end and a second end in a longitudinal direction
Implementation Method 2
using a color filter layer to minimize external light reflection
Data Source
Figure 1~2a
Figure 2b
Figure 3
AI summary
A light emitting device including: a substrate; a light emitting element provided on the substrate, and having a first end and a second end in a longitudinal direction; first and second partition walls provided on the substrate and spaced apart from each other by a predetermined distance, with the light emitting element interposed therebetween; a first electrode provided on the first partition wall to be adjacent to the first end of the light emitting element, and a second electrode provided on the second partition wall to be adjacent to the second end of the light emitting element; and a first contact electrode coupling the first electrode and the first end of the light emitting element, and a second contact electrode coupling the second electrode and the second end of the light emitting element. When viewed on a plane, the first electrode partially overlaps the first partition wall, and the second electrode partially overlaps the second partition wall.