Light-Emitting Element Electrode Layout for Precise LED Alignment
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Solution Overview
Problem
The challenge of aligning subminiature light emitting diodes (LEDs) on electrodes is difficult, leading to alignment defects and reduced efficiency in lighting and display devices.
Innovation Solution
A light emitting device design featuring a first and second electrode with an insulating pattern and partition walls, along with reflective electrodes, ensures precise alignment and electrical connection of LEDs, enhancing their efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If subminiature LEDs are disposed on electrodes, then the space needed for electrodes is reduced, but alignment defects occur and manufacturing precision deteriorates
Solution Approach 1:
The patent introduces partition walls that divide the electrode structure into separate regions. These partition walls create distinct zones for LED placement, enabling precise alignment of subminiature LEDs while maintaining reduced electrode area. The segmentation of the electrode structure into multiple functional zones resolves the contradiction between space reduction and alignment precision.
Solution Approach 2:
The patent employs an insulating pattern as an intermediary element between the electrode and the LED. This insulating pattern facilitates precise positioning and alignment of subminiature LEDs on the electrode, acting as a mediator that enables accurate placement while maintaining the compact electrode design. The intermediary structure resolves the alignment precision issue without compromising the space reduction benefit.
2Volume of moving object
If subminiature LEDs are disposed on electrodes, then device miniaturization is achieved, but alignment defects increase
Solution Approach 1:
The partition walls segment the device structure into well-defined regions, creating reliable positioning zones for subminiature LEDs. This segmentation maintains device miniaturization while improving alignment reliability by providing clear structural boundaries that guide precise LED placement within the compact volume.
Solution Approach 2:
The insulating pattern and partition walls are formed in advance during the manufacturing process, creating pre-established alignment guides and positioning structures. This preliminary action ensures that when subminiature LEDs are placed, they can be accurately positioned, thereby maintaining both device miniaturization and alignment reliability.
3Manufacturing precision
If partition walls are added for alignment, then alignment precision is improved, but device complexity increases
Solution Approach 1:
The partition walls serve multiple functions simultaneously: they provide alignment guidance for LEDs, act as structural support elements, and define functional zones within the electrode. This multi-functionality reduces the need for separate alignment components, thereby improving alignment precision while minimizing the increase in device complexity.
Solution Approach 2:
The patent merges the alignment function with the existing electrode structure by integrating partition walls into the electrode design. This merging combines structural and alignment functions into a single integrated component, achieving improved alignment precision without proportionally increasing device complexity.
4Reliability
If reflective electrodes are added for electrical connection, then electrical connection reliability is improved, but device complexity increases
Solution Approach 1:
The reflective electrodes serve dual purposes: they provide electrical connection to the LEDs and simultaneously act as reflective surfaces for light extraction. This multi-functionality improves electrical connection reliability while minimizing the increase in device complexity by combining electrical and optical functions in a single structure.
Data Source
AI summary
A light emitting device may include a first electrode disposed on a substrate, and a second electrode spaced apart from the first electrode, the first electrode and the second electrode being disposed on a same layer; an insulating pattern disposed between the first electrode and the second electrode, and overlapping a portion of the first electrode and a portion of the second electrode; and at least one light emitting element disposed on the insulating pattern, and including a first end and a second end in a longitudinal direction of the at least one light emitting element; a first bank disposed on the first electrode, and a second bank disposed on the second electrode; a first reflective electrode disposed on the first bank and electrically connected with the first electrode; and a second reflective electrode disposed on the second bank and electrically connected with the second electrode.