Vertical Light-Emitting Element Layout for Electrode Alignment
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Solution Overview
Problem
Current display devices face challenges in enhancing light emission efficiency, particularly in the design and manufacturing of light emitting elements within the display devices, where existing configurations do not effectively optimize the alignment and structure of semiconductor layers and electrodes to maximize light output.
Innovation Solution
The proposed solution involves a display device design with a specific structure that includes a first pixel electrode, a light emitting element with n-type and p-type semiconductor layers, and a second pixel electrode, where the light emitting element is aligned vertically within an opening in an insulating layer, allowing for improved light emission efficiency by optimizing the distance and alignment of electrodes and the insulating layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the light emitting element is not properly aligned within the opening, then manufacturing simplicity is maintained, but light emission efficiency deteriorates
Solution Approach 1:
The insulating layer is formed with an opening that pre-defines the precise position and orientation of the light emitting element before the element is installed. This preliminary structural preparation ensures that when the light emitting element is placed in the opening, it is automatically aligned in the correct position, thereby improving light emission efficiency without requiring complex real-time alignment adjustments during manufacturing.
2Productivity
If the distance between electrodes is not optimized, then device structure simplicity is maintained, but light emission efficiency deteriorates
Solution Approach 1:
The patent optimizes the distance between the first and second electrodes by controlling the thickness of the insulating layer. By adjusting this geometric parameter within a specific range, the light emission efficiency is maximized while maintaining a simple overall device structure. The optimized electrode spacing ensures proper electrical contact and light extraction without requiring complex electrode designs or additional structural components.
3Reliability
If the insulating layer thickness is not controlled, then manufacturing simplicity is maintained, but electrical insulation and alignment deteriorate
Solution Approach 1:
The thickness of the insulating layer is controlled within a specific parameter range to simultaneously achieve proper electrical insulation between electrodes and correct alignment of the light emitting element. By optimizing this single geometric parameter, both electrical reliability and manufacturing precision are improved without requiring additional insulating layers or complex manufacturing processes.
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 by ensuring proper alignment and exposure of the light emitting element, reducing unwanted short circuits and improving the overall performance of the display device.
Implementation Method 1
a light emitting element disposed in the opening and including a first end portion electrically contacting the first pixel electrode and a second end portion
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
A display device includes a first pixel electrode disposed on a base layer, a first insulating layer disposed on the first pixel electrode and including an opening exposing the first pixel electrode, a first electrode and a second electrode disposed on the first insulating layer and spaced apart from each other with the opening disposed between the first electrode and the second electrode, a light emitting element disposed in the opening and including a first end portion electrically contacting the first pixel electrode and a second end portion, a second insulating layer covering the first insulating layer, the first electrode, and the second electrode and exposing the second end portion of the light emitting element, and a second pixel electrode disposed on the second insulating layer and electrically contacting the second end portion of the light emitting element.