Regional Halogen Nanoparticle Layers for Display Efficiency and Durability
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Solution Overview
Problem
Display devices with nanoparticle layers, such as quantum dots and halogen ligands, are prone to damage at sites of mechanical stress, and reducing halogen ligand concentration compromises luminous efficiency.
Innovation Solution
A display device with distinct regions: a central region with higher halogen atom concentration in nanoparticle layers and end regions with lower concentration, optimizing nanoparticle layer thickness and intruding portions to balance damage resistance and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the concentration of halogen ligand is increased in the nanoparticle layer, then the luminous efficiency is improved, but the nanoparticle layer becomes easily damaged at sites where mechanical stress occurs
Solution Approach 1:
The patent applies local quality by creating different halogen ligand concentrations in different regions of the nanoparticle layer. The first nanoparticle layer has a higher halogen ligand concentration in the first region (central portion) to maximize luminous efficiency, while the second nanoparticle layer has a lower halogen ligand concentration in the second region (end portion) to enhance damage resistance where mechanical stress occurs.
2Reliability
If the amount of halogen ligand is reduced to reduce damage, then the damage resistance is improved, but the luminous efficiency significantly deteriorates
Solution Approach 1:
The patent segments the nanoparticle layer into multiple layers with different halogen ligand concentrations. The first nanoparticle layer is positioned in the first region with higher halogen ligand concentration for efficiency, while the second nanoparticle layer is positioned in the second region with lower halogen ligand concentration for durability, allowing each region to be optimized independently.
Solution Approach 2:
The patent implements local quality by spatially varying the halogen ligand concentration across different regions of the display device. The first region (central portion) maintains high halogen ligand concentration for optimal luminous efficiency, while the second region (end portion) uses low halogen ligand concentration to resist mechanical stress damage.
3Loss of energy
If a uniform high concentration of halogen ligand is used across the entire display region, then the luminous efficiency is maximized, but the nanoparticle layer is easily damaged in end regions where mechanical stress occurs
Solution Approach 1:
The patent applies local quality by creating spatial variation in halogen ligand concentration. The first nanoparticle layer in the first region (central portion) has high halogen ligand concentration for maximum luminous efficiency, while the second nanoparticle layer in the second region (end portion) has low halogen ligand concentration to provide mechanical strength and resist stress damage.
Solution Approach 2:
The patent segments the uniform nanoparticle layer into multiple nanoparticle layers positioned at different locations. The first nanoparticle layer is formed in the first region with high halogen ligand concentration, while the second nanoparticle layer is formed in the second region with low halogen ligand concentration, allowing independent optimization of each region's properties.
Data Source
AI summary
A display device includes a display region including a first region including at least a part of a central portion of the display region and a second region including at least a part of end portions of the display region, a first light-emitting element provided in the first region, and a second light-emitting element provided in the second region, in which each of the first light-emitting element and the second light-emitting element includes a first electrode and a second electrode, and a nanoparticle layer positioned between the first electrode and the second electrode, the nanoparticle layer containing nanoparticles, and a concentration of halogen atoms contained in a first layer which is the nanoparticle layer of the first light-emitting element is higher than a concentration of halogen atoms contained in a second layer which is the nanoparticle layer of the second light-emitting element.