OLED Pixel Layout With Integrated Emission Layers for High Luminance
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Solution Overview
Problem
In organic light-emitting display apparatuses, the increasing demand for high resolution leads to smaller sub-pixels, which struggle to emit sufficient luminance due to reduced emission areas and decreased deposition efficiency during the manufacturing process.
Innovation Solution
The display apparatus is designed with specific pixel configurations where first, second, and third pixels are arranged in alternating columns with reduced separation distances, allowing for integral formation of emission layers as single bodies, increasing the emission area and deposition efficiency by optimizing the arrangement of pixel electrodes and emission layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sub-pixel size is decreased to achieve high resolution, then the resolution is improved, but the luminance becomes insufficient
Solution Approach 1:
The patent merges emission layers of multiple adjacent pixels into a single integrated emission layer structure. This allows the emission layers to be formed as one continuous layer during the manufacturing process, increasing the effective emission area while maintaining high pixel density for high resolution display
2Measurement precision
If the sub-pixel size is decreased to achieve high resolution, then the resolution is improved, but the emission area becomes insufficient
Solution Approach 1:
The patent merges emission layers of multiple adjacent pixels into a single integrated emission layer structure. This allows the emission layers to be formed as one continuous layer during the manufacturing process, increasing the effective emission area while maintaining high pixel density for high resolution display
Solution Approach 2:
The patent extends the emission layer in the vertical direction (stacking multiple emission layers) to increase the total emission area. By forming multiple emission layers at different heights, the display achieves sufficient luminance and emission area while maintaining small sub-pixel footprints for high resolution
3Manufacturing precision
If the emission layers are formed separately for each pixel, then the manufacturing precision is maintained, but the deposition efficiency decreases
Solution Approach 1:
The patent merges the formation process of multiple emission layers into a single deposition step. The emission layers of multiple pixels are formed simultaneously as one continuous layer, which dramatically improves deposition efficiency while the subsequent patterning process maintains the required manufacturing precision for each pixel
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 the emission area and deposition efficiency, enabling the display apparatus to emit light of higher luminance and improving the manufacturing process efficiency.
Implementation Method 1
An organic light-emitting display apparatus is a display apparatus that generates images through light emitted from an emission layer that is positioned between a pixel electrode and an opposite electrode. The organic light-emitting display apparatus controls a pixel electrode that is electrically connected to a thin-film transistor and an electrical signal applied to the pixel electrode through the thin-film transistor to control whether each pixel emits light and the degree of light emission.
Data Source
AI summary
A display apparatus includes a plurality of first pixels each including a first emission layer, a plurality of second pixels each including a second emission layer, and a plurality of third pixels each including a third emission layer. The plurality of first and second pixels are in a first column. A set of a pair of first pixels and a set of a pair of second pixels are alternately positioned in the first column. The plurality of third pixels are in a second column and are in sets each comprising four consecutive third pixels. The first emission layer is integrally formed as a single body in the set of first pixels, the second emission layer is integrally formed as a single body in the set of second pixels, and the third emission layer is integrally formed as a single body in each of sets of third pixels.