Contact Electrode Segmentation for Reflective Region Expansion
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Solution Overview
Problem
The existing light emitting apparatuses face a challenge in ensuring the reflective region of the reflective electrode while maintaining contact with the contact electrode, leading to reduced light reflection efficiency.
Innovation Solution
A light emitting apparatus is designed with a contact electrode that includes a first portion on an insulating portion and a second portion extending continuously to contact the reflective electrode, while maintaining a first and second insulating portion between the reflective electrodes of adjacent pixels to ensure the reflective region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the contact electrode is arranged to connect the reflective electrode and the pixel electrode, then the contact resistance is reduced, but the reflective region of the reflective electrode is decreased
Solution Approach 1:
The contact electrode is divided into two distinct portions: a first portion that contacts the pixel electrode and a second portion that contacts the reflective electrode. This segmentation allows each portion to be optimized for its specific function, maintaining low contact resistance while minimizing the area occupied on the reflective electrode
Solution Approach 2:
Different portions of the contact electrode are positioned in different locations with different functional requirements. The first portion is located where it can effectively contact the pixel electrode, while the second portion is positioned to contact the reflective electrode with minimal area occupation, ensuring local optimization of both electrical connection and light reflection
2Illumination intensity
If the reflective region is increased to improve light reflection efficiency, then the viewing angle and resolution are improved, but the contact between the contact electrode and the reflective electrode may be compromised
Solution Approach 1:
By segmenting the contact electrode into two portions, the design allows the reflective electrode to have a larger overall reflective region while ensuring that a specific second portion of the contact electrode maintains reliable contact with the reflective electrode at an optimized location
Solution Approach 2:
The second portion of the contact electrode acts as an intermediary element that bridges the pixel electrode and the reflective electrode, ensuring reliable electrical connection while allowing the reflective electrode to maintain its light reflection function with minimal interference
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 effectively increases the reflective region, improving the light reflection efficiency and allowing for higher resolution and improved viewing angles in light emitting apparatuses.
Implementation Method 1
a reflective electrode arranged between the second electrode and the main surface, and the reflective electrode
Data Source
AI summary
A light emitting apparatus in which pixels are arranged on a substrate is provided. Each pixel includes a first electrode, a second electrode arranged between the first electrode and the substrate, an organic layer containing a light emitting material arranged between the first electrode and the second electrode, a reflective electrode arranged between the second electrode and the substrate, and a contact electrode connecting the second electrode and the reflective electrode. A first insulating portion is arranged between the reflective electrode and the second electrode and a second insulating portion is arranged between the reflective electrodes, and the contact electrode includes a first portion arranged on the second insulating portion, and a second portion extending from the first portion and being in contact with the reflective electrode.