Display Device Transmission Layers Homogeneity
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Solution Overview
Problem
Current display apparatuses face challenges in achieving clear color emission and high light extraction efficiency while maintaining reduced manufacturing costs, particularly in the arrangement and design of sub-pixels and their corresponding light-emitting diodes and filters.
Innovation Solution
The display apparatus includes sub-pixels of different colors with organic light-emitting diodes, quantum dots for color conversion, and transmission layers, where the transmission layers extend into non-pixel areas and overlap with color filters, using a common material for these layers to enhance light transmission and reduce manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If different materials are used for transmission layers corresponding to different sub-pixels, then color accuracy may be improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent applies homogeneity by using the same material for all transmission layers (first transmission layer, second transmission layer, third transmission layer) corresponding to different sub-pixels. This simplifies the manufacturing process and reduces complexity while maintaining adequate color transmission properties through the layered filter structure.
Solution Approach 2:
The patent segments the color filtering function into multiple dedicated layers (first color filter, second color filter, third color filter), where each layer is responsible for filtering a specific color. This segmentation allows each layer to be optimized independently while using the same base transmission layer material, balancing color accuracy with manufacturing simplicity.
2Ease of manufacture
If transmission layers are confined only to pixel areas, then manufacturing is simpler, but light extraction efficiency decreases
Solution Approach 1:
The patent extends the transmission layers from two-dimensional pixel areas into the third dimension by allowing them to overlap with color filters in the vertical stacking direction. This dimensional extension enables the transmission layers to work in conjunction with the color filters for improved light extraction without significantly complicating the manufacturing process.
3Ease of manufacture
If color filters are positioned only directly over their corresponding sub-pixels, then alignment is easier, but color purity and light utilization are reduced
Solution Approach 1:
The patent utilizes the vertical dimension by stacking multiple color filter layers (first color filter, second color filter, third color filter) at different heights. This allows color filters to be positioned both directly over and adjacent to sub-pixels in the vertical stacking direction, improving color purity and light utilization while maintaining manufacturing feasibility through the layered architecture.
4Reliability
If multiple different materials are used for light-emitting components, then performance can be optimized, but manufacturing cost increases
Solution Approach 1:
The patent applies homogeneity by using the same material composition for all transmission layers (first, second, and third transmission layers), reducing material costs and simplifying the supply chain. This is complemented by the segmentation principle, where different color filtering functions are achieved through separate filter layers rather than requiring different transmission layer materials.
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 allows for clear color implementation and increased light extraction efficiency, enabling the display of full-color images with reduced manufacturing costs by simplifying the process and using a single material for key components.
Implementation Method 1
a color conversion layer disposed over one of the organic light-emitting diodes corresponding to one of the first sub-pixels, and including quantum dots converting incident light into light of the first color
Implementation Method 2
a plurality of organic light-emitting diodes disposed over a lower substrate to correspond to the first sub-pixels, the second sub-pixels, and the third sub-pixels, respectively, and each including a first electrode, at least two emission layers emitting light of different colors
Implementation Method 3
a first color filter disposed over the color conversion layer and transmitting light of the first color, a second color filter disposed over the first transmission layer and transmitting light of the second color
Data Source
AI summary
A display apparatus includes first sub-pixels, second sub-pixels, and third sub-pixels, an organic light-emitting diode including at least two emission layers emitting light of different colors, a color conversion layer disposed over the first sub-pixels and including quantum dots converting incident light into light of a first color, a first color filter disposed over the color conversion layer, a first transmission layer disposed over the second sub-pixels, a second color filter disposed over the first transmission layer, a second transmission layer disposed over the third sub-pixels, and a third color filter disposed over the second transmission layer, wherein a material of the first transmission layer is a same material as the second transmission layer.