Display Device Spaced Electrode Insulating Layer Light Emission
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Solution Overview
Problem
Current display devices face inefficiencies in light emission, particularly in directing light upwards while minimizing loss to lower directions, due to the arrangement of electrodes and light emitting elements.
Innovation Solution
A display device design featuring spaced electrodes with an insulating layer and a light emitting element, where the electrodes are positioned to form an electric field that aligns the light emitting element, reducing lower-direction light loss and enhancing upper-direction light efficiency by using bank patterns and connection electrodes to optimize light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If electrodes are positioned close to each other for compact device structure, then device area is reduced, but light loss to lower direction increases and light emitting efficiency decreases
Solution Approach 1:
The device is segmented into distinct functional zones: a light emission area where the light emitting element is located, and a spaced area where electrodes are positioned. This segmentation allows the light emitting element to be optimally positioned for light emission while electrodes are placed in a separate region to minimize light interference and energy loss.
Solution Approach 2:
The patent utilizes the thickness direction (vertical dimension) to resolve the contradiction. By positioning electrodes at different heights relative to the light emitting element - with at least one electrode extending below the lower surface of the light emitting element in the thickness direction - the design achieves compact lateral spacing while maintaining vertical separation to reduce light loss.
2Ease of manufacture
If electrodes are positioned to align with light emitting element for compact design, then manufacturing is simplified, but light emitting efficiency in upper direction decreases
Solution Approach 1:
Different regions of the device have different structural characteristics. The light emission area maintains alignment for manufacturing simplicity, while the spaced area features offset electrode positioning to optimize light emission. Specifically, the first electrode is positioned to overlap the light emitting element for ease of manufacture, while the second electrode is offset to minimize light loss, creating local quality variations that balance manufacturing and performance.
Solution Approach 2:
The electrode configuration employs asymmetric positioning relative to the light emitting element. Rather than symmetric alignment of both electrodes, the design uses asymmetric arrangement where electrodes are positioned at different lateral and vertical positions, with at least one electrode extending below the light emitting element's lower surface, creating an asymmetric structure that optimizes both manufacturing and light emission efficiency.
3Loss of energy
If spaced area is enlarged to reduce light loss, then light emitting efficiency improves, but device complexity increases
Solution Approach 1:
The electrode structures are designed with dynamic spatial arrangement rather than fixed symmetric positioning. The electrodes can extend in different directions and at different distances from the light emitting element, with at least one electrode positioned below its lower surface. This dynamic configuration allows flexible optimization of the spaced area to reduce light loss while maintaining manageable device complexity through adaptable rather than rigid structural design.
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 improves light emitting efficiency by minimizing light loss to the lower direction and increasing the amount of light emitted upwards, resulting in enhanced display performance.
Implementation Method 1
an insulating layer disposed on the first electrode and the second electrode, the insulating layer filling the spaced area
Implementation Method 2
a light emitting element disposed on the insulating layer and having a first end disposed on the first electrode and a second end opposite to the first end
Implementation Method 3
improves light emitting efficiency by minimizing light loss to the lower direction and increasing the amount of light emitted upwards
Data Source
AI summary
A display device includes a first electrode and a second electrode disposed on a substrate, the first and second electrodes being spaced apart from each other with a spaced area disposed between the first and second electrodes, an insulating layer disposed on the first electrode and the second electrode, the insulating layer filling the spaced area, and a light emitting element disposed on the insulating layer and having a first end disposed on the first electrode and a second end opposite to the first end. The insulating layer includes a first opening adjacent to the first end and exposing the insulating layer, and the spaced area is adjacent to the second end of the light emitting element.