Pixel Electrode Layout With Intermediate Overlap for Light Output
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Solution Overview
Problem
Current display devices face challenges in enhancing light output efficiency of light emitting elements, particularly in achieving optimal electrical connections and structural configurations that maximize light emission.
Innovation Solution
A pixel design featuring a first and second electrode with light emitting elements in between, connected by contact electrodes and an intermediate electrode, which includes overlapping areas for improved electrical connectivity and light distribution, allowing for efficient light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional electrode structure is used, then the device complexity is low, but the light output efficiency is insufficient
Solution Approach 1:
The electrode structure is segmented into multiple functional components: first electrode, second electrode, first contact electrode, second contact electrode, and intermediate electrode. Each segment performs a specific function in the electrical connection pathway, allowing optimization of light output efficiency through improved electrical connectivity while maintaining manageable structural complexity through modular design
Solution Approach 2:
The intermediate electrode extends in multiple directions to overlap with both the first and second electrodes, creating a three-dimensional electrical connection network. This multi-dimensional arrangement improves electrical connectivity and light output efficiency by providing multiple connection pathways rather than simple planar connections
2Reliability
If the contact electrodes are spaced apart, then the manufacturing precision requirements are reduced, but the electrical connection efficiency decreases
Solution Approach 1:
The intermediate electrode serves as an intermediary component that bridges the first and second contact electrodes. By providing an intermediate connection point that overlaps with both main electrodes, it ensures reliable electrical connection while allowing greater spacing between the primary contact electrodes, thereby reducing manufacturing precision requirements
3Reliability
If the intermediate electrode overlaps both first and second electrodes, then the electrical connectivity is improved, but the device complexity increases
Solution Approach 1:
The intermediate electrode performs multiple functions simultaneously: it connects to the first electrode, connects to the second electrode, provides an additional electrical pathway, and serves as a structural support element. This multi-functionality improves electrical connectivity while justifying the added structural element through its multiple roles in the system
Data Source
AI summary
A pixel includes a first electrode; a second electrode surrounding at least a portion of the first electrode; a plurality of light emitting elements between the first electrode and the second electrode; a first contact electrode on the first electrode, the first contact electrode electrically connecting the first electrode and the plurality of light emitting elements; a second contact electrode on the second electrode, the second contact electrode electrically connecting the second electrode and the plurality of light emitting elements; and an intermediate electrode on the first electrode and the second electrode, the intermediate electrode comprising a first area overlapping the first electrode and a second area overlapping the second electrode, the first area and the second area being integrally connected to each other.