Sub-Pixel Layout With Light Blocking for Functional LED Density
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Solution Overview
Problem
Existing display devices face challenges in maximizing the ratio of functional light emitting elements and improving process predictability during manufacturing.
Innovation Solution
A display device design with light emitting elements arranged in a matrix form, incorporating a light blocking layer to define sub-pixel areas and utilizing wavelength conversion patterns to enhance light emission efficiency and process control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If light emitting elements are arranged in a matrix form with sub-pixel areas defined by a light blocking layer, then the ratio of functional light emitting elements is increased, but the device complexity increases due to additional layers and arrangement constraints
Solution Approach 1:
The display area is segmented into multiple sub-pixel areas (first sub-pixel area, second sub-pixel area, third sub-pixel area) that are spatially separated and independently configured. Each sub-pixel area contains specific light emitting elements with defined arrangement patterns, allowing functional optimization while maintaining overall device integration. This segmentation enables higher ratio of functional elements by reducing wasted space between elements.
Solution Approach 2:
The patent introduces a vertical dimension by stacking multiple sub-pixel areas at different heights or positions along the thickness direction. The first, second, and third sub-pixel areas are arranged in a three-dimensional configuration rather than a simple planar grid, enabling increased functional element density without proportionally increasing lateral footprint or manufacturing complexity.
2Manufacturing precision
If sub-pixel areas are spaced apart in the first direction with specific dimensional relationships, then manufacturing predictability is improved, but the area occupied by non-functional regions increases
Solution Approach 1:
The patent defines specific dimensional parameters for sub-pixel areas including spacing distances in the first direction, lengths in the second direction, and height differences between adjacent sub-pixel areas. By establishing quantitative relationships between these parameters (e.g., spacing equals a fraction of element pitch), the design achieves manufacturing predictability through controlled parameter variation rather than uniform spacing, maximizing functional area utilization.
Solution Approach 2:
Different regions of the display are configured with locally optimized sub-pixel arrangements. Each sub-pixel area has specific dimensional characteristics tailored to its position and function, with spacing and sizing optimized for local manufacturing capabilities and performance requirements. This local optimization allows predictable manufacturing processes while minimizing overall non-functional area.
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
Increases the ratio of functional light emitting elements and improves manufacturing predictability by optimizing the arrangement and configuration of sub-pixel areas, enhancing light emission efficiency and process control.
Implementation Method 1
a light blocking layer on the substrate and defining the first sub pixel area and the second sub pixel area
Implementation Method 2
utilizing wavelength conversion patterns to enhance light emission efficiency and process control
Data Source
AI summary
A display device may include a plurality of light emitting elements on a substrate and arranged in a matrix form along a first arrangement direction and a second arrangement direction crossing the first arrangement direction, and a first sub pixel area and a second sub pixel area each overlapping at least a portion of the plurality of light emitting elements, spaced from each other in a first direction, and extending in a second direction crossing the first direction. The second direction and the first arrangement direction may be non-parallel to each other.