Light Emitting Element Electrode Layout for Orientation-Independent Emission
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Solution Overview
Problem
Existing display devices face challenges in ensuring light emission regardless of the orientation direction of light emitting elements, which affects the efficiency and uniformity of light output.
Innovation Solution
A display device design featuring a specific configuration of electrodes and insulating layers that allows current to flow in a selected direction, with light emitting elements having ends disposed on multiple electrodes and connection electrodes that contact these elements through openings in the insulating layers, enabling light emission regardless of orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If light emitting elements are disposed with specific orientation directions, then current can flow in a selected direction, but light emission cannot be ensured regardless of orientation directions
Solution Approach 1:
The patent applies universality by designing the light emitting elements and connection electrodes such that the elements can be disposed in different orientation directions (first direction or second direction) while still achieving reliable light emission. The connection electrodes are configured to electrically contact the light emitting elements regardless of their orientation, making the system adaptable to multiple configurations while maintaining consistent functionality.
Solution Approach 2:
The patent introduces an additional dimension of freedom by allowing light emitting elements to be disposed in either a first direction or a second direction. The connection electrodes are positioned to contact the elements from multiple possible orientations, adding dimensional flexibility to the system while ensuring current flow and light emission are maintained in all configurations.
2Reliability
If multiple connection electrodes are used to contact light emitting elements from different directions, then light emission is ensured regardless of orientation, but device structure becomes more complex
Solution Approach 1:
The patent applies segmentation by dividing the connection function into multiple connection electrodes positioned at different locations and orientations. Each connection electrode is responsible for contacting light emitting elements in specific orientation directions, allowing the system to handle multiple orientations through segmented electrode arrangements rather than requiring a single complex electrode structure.
3Productivity
If light emitting elements are arranged in different orientations, then manufacturing yield can be improved, but current flow control becomes more difficult
Solution Approach 1:
The patent applies local quality by configuring connection electrodes with specific local properties to contact light emitting elements in particular orientation directions. Each connection electrode is positioned and shaped to match the local requirements of elements in specific orientations, allowing current flow control to be adapted locally rather than requiring a uniform approach for all element orientations.
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 enhances light emission efficiency and uniformity by allowing current to flow effectively through the light emitting elements, improving the yield of the manufacturing process and ensuring consistent light output across the display device.
Implementation Method 1
light emitting elements disposed on the first insulating layer, each of the light emitting elements having a first end disposed on the first electrode and a second end disposed on the second electrode
Data Source
AI summary
A display device comprises a first electrode and a second electrode on a substrate, a first insulating layer on the first electrode and the second electrode, light emitting elements on the first insulating layer each having a first end on the first electrode and a second end on the second electrode, a first connection electrode disposed on the first electrode and electrically contacting the first end of each of the light emitting elements, a second connection electrode disposed on the second electrode and electrically contacting the second end of each of the light emitting elements, a second insulating layer on the light emitting elements, the first connection electrode and the second connection electrode, and a third connection electrode disposed on the second insulating layer and electrically contacting the light emitting elements through an opening formed in the second insulating layer that partially exposes the light emitting elements.