Stacked Emission Layer Display Panel for High Resolution in Thin Glasses
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Solution Overview
Problem
The development of high-resolution and thin display devices is crucial due to the increasing importance of display devices in information technology, but existing technologies face challenges in achieving these requirements.
Innovation Solution
A display panel is designed with a substrate that includes pixels emitting light in different wavelength bands, each with a pixel circuit, and multiple emission layers with contact holes for electrode connections, allowing for efficient light emission and thin structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple emission layers are stacked to achieve high resolution, then image resolution is improved, but device thickness increases
Solution Approach 1:
The patent transitions from horizontal pixel arrangement to vertical stacking of emission layers, utilizing the third dimension (depth) to achieve high resolution without increasing the device's planar footprint or overall thickness. Multiple emission layers are stacked vertically, with each layer containing sub-pixels that emit different colors, thereby achieving high resolution through spatial dimensionality change.
Solution Approach 2:
The patent implements a nested structure where multiple emission layers are stacked one on top of another, with each layer containing sub-pixels nested within the vertical stack. The contact holes and electrodes are also nested through the multiple layers, creating a compact three-dimensional structure that achieves high resolution while maintaining thin profile.
2Reliability
If contact holes are formed by removing emission layers, then electrode connectivity is improved, but light emission area is reduced
Solution Approach 1:
The patent divides the contact hole formation into multiple segments corresponding to different emission layers. Each contact hole is formed by selectively removing portions of specific emission layers at different stages, allowing precise control over which layers remain intact for light emission and which are removed for electrode access. This segmented approach ensures adequate electrode connectivity while preserving maximum light emission area.
Solution Approach 2:
The patent applies local quality by making each emission layer have different properties in different regions. Specific portions of emission layers are removed to form contact holes where electrode connectivity is needed, while other portions are preserved to maintain light emission functionality. This localized modification ensures that each region of the emission layer serves its specific function optimally.
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
The display panel achieves high-resolution image display and a thin structure, addressing the need for advanced display devices that are both high in resolution and compact in design.
Implementation Method 1
a first emission layer disposed on the substrate, and that emits light in the first wavelength band, a second emission layer disposed on the first emission layer, and that emits light in the second wavelength band, and a third emission layer disposed on the second emission layer, and that emits light in a third wavelength band. The first emission layer may include a first semiconductor layer that provides electrons, a second semiconductor layer that provides holes, and an active layer disposed between the first semiconductor layer and the second semiconductor layer
Data Source
AI summary
A display panel, including an a-th first electrode connected to a pixel circuit of a first pixel, and electrically connected to a first emission layer in a first contact hole, a b-th first electrode connected to a pixel circuit of a second pixel, and electrically connected to a second emission layer in a second contact hole formed by removing at least a portion of the first emission layer, a c-th first electrode connected to a pixel circuit of a third pixel, and electrically connected to a third emission layer in a third contact hole formed by removing at least portions of the first and second emission layers, and a second electrode connected to the pixel circuits of the first to third pixels, and connected to the first to third emission layers in a fourth contact hole formed by removing at least portions of the first to third emission layers.