Display Electrode Layout Using Hydrophilic Pixel Alignment
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Solution Overview
Problem
Existing display devices face challenges in aligning light-emitting elements effectively between neighboring pixels, leading to inefficiencies in light emission and increased complexity in manufacturing processes.
Innovation Solution
A display device structure featuring a substrate with electrodes and insulating layers, where a hydrophilic region and a hydrophobic region are defined within the insulating layer to selectively position light-emitting elements, enhancing alignment and density between pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a structure is provided between neighboring pixels to define regions, then light-emitting elements can be positioned, but device complexity increases
Solution Approach 1:
The insulating layer is divided into hydrophilic and hydrophobic regions with different surface properties. The hydrophilic region attracts and positions light-emitting elements through selective adhesion, while the hydrophobic region repels them. This local differentiation of surface properties enables precise positioning without requiring physical structural barriers between pixels, thus resolving the contradiction between positioning precision and device complexity.
2Productivity
If light-emitting elements are densely arranged, then productivity improves, but alignment precision deteriorates
Solution Approach 1:
By creating distinct hydrophilic regions within the insulating layer, each capable of holding multiple light-emitting elements, the patent enables high-density arrangement while maintaining alignment precision. The local hydrophilic properties ensure that elements self-align within their designated regions even when densely packed, resolving the contradiction between productivity and manufacturing precision.
3Area of stationary object
If pixel size is reduced, then area efficiency improves, but alignment of light-emitting elements becomes more difficult
Solution Approach 1:
The patent maintains alignment precision in miniaturized pixels by incorporating hydrophilic regions within the insulating layer of each pixel. These localized hydrophilic zones provide reliable positioning cues for light-emitting elements even when the overall pixel dimensions are reduced, enabling area efficiency improvement without sacrificing alignment precision.
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 approach minimizes light-emitting elements outside the intended region, improves alignment, and allows for reduced pixel size while maintaining efficient light emission, even without structural barriers between adjacent pixels.
Implementation Method 1
a first insulating layer disposed on the substrate to cover at least a portion of the first electrode and a portion of the second electrode, and at least one first light-emitting element disposed on the first insulating layer and between the first electrode and the second electrode, and the first insulating layer comprises a first sub-insulating layer including a first portion containing a hydrophilic material and a second portion which is a region of the first insulating layer except for the first portion and which contains a hydrophobic material
Data Source
AI summary
Provided are a display device and a manufacturing method thereof. The display device comprises: a substrate; a first electrode and a second electrode disposed on the substrate to be spaced apart from each other; a first insulating layer disposed on the substrate so as to cover at least a portion of the first electrode and the second electrode; and at least one first light emitting element disposed between the first electrode and the second electrode, on the first insulating layer. The first insulating layer comprises: a first sub-insulating layer comprising a first portion including a hydrophilic material and a second portion which is a region of the first insulating layer except for the first portion and includes a hydrophobic material; and a second sub-insulating layer disposed below the first sub-insulating layer, and at least a portion of the at least one first light emitting element is disposed on the first portion.