Rear-Emitting Display Electrode Openings With Reflective Layer
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Solution Overview
Problem
Current display devices using light emitting diodes face challenges in enhancing light emission efficiency, particularly in the design and structure of electrodes and reflective layers to optimize light emission to the rear surface.
Innovation Solution
The display device incorporates a dome-shaped reflective layer and electrodes with openings, made of materials like Ag, Mg, Al, or Cu, which are strategically arranged to improve light emission efficiency by allowing light to be emitted to the rear surface, and includes a transparent conductive material for efficient light transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a continuous electrode structure is used, then electrical conductivity is improved, but light emission efficiency to the rear surface deteriorates
Solution Approach 1:
The electrode is divided into multiple discrete segments rather than using a continuous structure. These segmented electrodes are arranged in a pattern that allows light to pass through the gaps between them, improving light emission efficiency to the rear surface while maintaining sufficient electrical conductivity through the distributed conductive paths.
Solution Approach 2:
Different regions of the electrode structure are assigned different properties: certain areas maintain high conductivity to ensure reliable electrical connection, while other regions are designed with lower conductivity or gaps to allow light transmission. This local differentiation resolves the contradiction between conductivity and light emission efficiency.
2Loss of energy
If a reflective layer is added to improve light emission, then light emission efficiency is improved, but device complexity increases
Solution Approach 1:
The reflective layer is integrated with the existing electrode structure rather than being added as a completely separate component. The electrode pattern itself serves dual functions: electrical conduction and light management through its reflective properties and geometric arrangement, thereby improving light emission without proportionally increasing device complexity.
Solution Approach 2:
The electrode structure is designed to perform multiple functions simultaneously: providing electrical conductivity for device operation and acting as a reflective element for light management. This multi-functionality reduces the need for additional dedicated components, thereby improving light emission efficiency without excessive increase in device complexity.
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 that light is effectively reflected and transmitted through the openings in the electrodes, leading to improved display quality and reduced signal delay.
Implementation Method 1
a dome-shaped reflective layer and electrodes with openings, made of materials like Ag, Mg, Al, or Cu, which are strategically arranged to improve light emission efficiency by allowing light to be emitted to the rear surface
Implementation Method 2
includes a transparent conductive material for efficient light transmission
Data Source
AI summary
The display device according to an exemplary embodiment of the present disclosure includes a substrate and a display element unit. The display element unit includes a first electrode on the substrate, a second electrode on the substrate and spaced apart from the first electrode in a first direction, and a plurality of light emitting elements between the first electrode and the second electrode in a plan view. Each of the first and second electrodes includes an opening.