Light Emitting Element Structure to Prevent Electrode Short Circuits
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Solution Overview
Problem
Existing display devices face issues with short circuits between the common electrode and the contact electrode, which can lead to performance degradation and reduced lifespan.
Innovation Solution
The display device incorporates a light emitting element with a specific structure comprising a first, second, and third element rod, each with distinct inclination angles, and protective layers to minimize the risk of short circuits, along with a contact electrode design that avoids direct contact with the common electrode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the contact electrode is positioned to electrically connect with the pixel electrode, then electrical connection is achieved, but the risk of short circuit with the common electrode increases
Solution Approach 1:
The element rod is divided into three distinct segments (first, second, and third element rods) with different inclination angles. This segmentation allows the contact electrode to be positioned on the first element rod while the common electrode contacts the third element rod, creating spatial separation that prevents short circuits while maintaining electrical connection functionality.
Solution Approach 2:
The patent introduces a dimensional solution by varying the inclination angles of different element rod segments. The first element rod has a first inclination angle, the second has a second inclination angle, and the third has a third inclination angle. This angular differentiation in the spatial dimension creates distinct contact zones for different electrodes, eliminating short circuit risks while preserving electrical connectivity.
2Reliability
If protective layers are added to prevent short circuits, then reliability improves, but device complexity increases
Solution Approach 1:
The protective function is merged into the element rod structure itself through the inclination angle design. The geometric configuration of the three element rod segments with different angles inherently provides protection against short circuits between the contact electrode and common electrode, eliminating the need for additional protective layers or complex insulation structures.
Data Source
AI summary
A display device, a light emitting element, and a manufacturing method of the display device are provided. The display device includes: a substrate on which a pixel electrode is located; a light emitting element on the pixel electrode and including an element rod and a contact electrode on one surface and a side surface of the element rod; a connection electrode electrically connecting the contact electrode and the pixel electrode; and a common electrode on the light emitting element, wherein the element rod includes: a first element rod including a first semiconductor layer and an active layer and having a side surface having a first inclination angle; a second element rod on the first element rod and having a side surface having a second inclination angle; and a third element rod on the second element rod and having a side surface having a third inclination angle.