Light-Emitting Element Connection Structure for Random Orientation
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Solution Overview
Problem
Existing display devices with light emitting elements face challenges in emitting light regardless of the orientation directions of these elements, leading to inefficiencies in light emission and potential manufacturing yield issues.
Innovation Solution
A display device configuration that includes a specific arrangement of electrodes and connection electrodes on a substrate, allowing light emitting elements to have ends disposed on different electrodes, and a third connection electrode that contacts the light emitting elements through an opening in the insulating layer, enabling current flow and light emission regardless of orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If light emitting elements are arranged with specific orientation directions, then current can flow in controlled direction, but light emission efficiency decreases when orientation is not aligned
Solution Approach 1:
The patent segments the connection structure into multiple independent connection electrodes (first, second, third connection electrodes) that can independently contact different ends and side surfaces of light emitting elements. This segmentation allows each electrode to serve specific orientation configurations without interfering with others, enabling parallel current paths for elements with different orientations.
Solution Approach 2:
The connection structure is designed with multi-functionality to handle various light emitting element orientations. The first and second connection electrodes contact ends of elements, while the third connection electrode contacts side surfaces, creating a universal connection system that works regardless of whether elements are oriented in one direction or multiple directions, thus improving both reliability and productivity.
2Productivity
If light emitting elements are disposed in random orientations, then manufacturing yield improves, but light emission efficiency decreases
Solution Approach 1:
The patent implements a dynamic connection architecture where the third connection electrode can adaptively contact side surfaces of light emitting elements regardless of their specific orientation. This dynamic design allows the system to accommodate random element orientations during manufacturing while maintaining reliable electrical connection and light emission efficiency through the flexible electrode configuration.
Solution Approach 2:
The third connection electrode acts as an intermediary that bridges the gap between randomly oriented light emitting elements and the electrical connection system. By contacting side surfaces in addition to the first and second connection electrodes contacting ends, this intermediary structure ensures continuous current flow paths even when elements are not uniformly oriented, thereby maintaining both manufacturing yield and emission efficiency.
3Ease of manufacture
If connection structure is simplified to reduce complexity, then manufacturing ease improves, but ability to handle multiple orientations is reduced
Solution Approach 1:
The patent transitions from a two-dimensional connection approach (contacting only ends of elements) to a three-dimensional approach by introducing the third connection electrode that contacts side surfaces. This dimensional expansion allows the system to handle multiple orientations without significantly increasing manufacturing complexity, as the additional electrode can be integrated into the existing layered structure using standard fabrication techniques.
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
The proposed solution allows for efficient light emission from light emitting elements regardless of their orientation, thereby improving the light emission rate per unit area and enhancing the manufacturing process yield.
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.