Sub-Pixel Alignment Layout for Reliable Inorganic LED Displays
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current display devices face challenges in achieving improved element reliability, particularly in the manufacturing process of inorganic light emitting diodes, which affect their durability and efficiency, especially under high-temperature conditions.
Innovation Solution
The display device incorporates a design with alternating sub-pixels having symmetrical orientations of light emitting elements, identification patterns, and specific alignment electrodes, along with a circuit element layer and insulating layers to enhance element reliability and manufacturing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inorganic light emitting diodes are used to improve durability and blue light efficiency, then element reliability is improved, but manufacturing complexity increases due to alignment requirements
Solution Approach 1:
Alignment electrodes are formed on the substrate before the light emitting elements are placed, establishing predetermined alignment patterns that guide the positioning of light emitting elements during manufacturing, thereby reducing alignment complexity
Solution Approach 2:
Alignment electrodes serve as intermediary structures that mediate between the substrate and the light emitting elements, providing a reference framework for precise positioning without requiring complex direct alignment mechanisms
2Manufacturing precision
If symmetrical orientation of light emitting elements is implemented in alternating sub-pixels, then manufacturing precision is improved, but device complexity increases due to identification patterns and electrode arrangements
Solution Approach 1:
While the overall layout uses symmetry, asymmetric identification patterns are introduced to distinguish between different sub-pixel types, enabling precise identification and alignment during manufacturing without requiring complex symmetric differentiation
Solution Approach 2:
The alignment electrodes serve multiple functions: they provide electrical connections, establish alignment references, and work in conjunction with identification patterns to enable precise positioning, reducing the need for separate dedicated alignment structures
3Manufacturing precision
If identification patterns are added to distinguish sub-pixels, then manufacturing precision is improved, but the active display area is reduced due to non-overlapping requirements
Solution Approach 1:
Identification patterns are extracted from the emission area and placed in adjacent non-emission regions, allowing them to perform their identification function without encroaching on the light-emitting space, thus maintaining full emission area utilization
Data Source
AI summary
A display device includes a display area where an image is displayed, a non-display area disposed adjacent to the display area, a first sub-pixel disposed in the display area, and a second sub-pixel disposed adjacent to the first sub-pixel in the display area. Each of the first sub-pixel and the second sub-pixel includes a plurality of alignment electrodes spaced apart from each other, and a plurality of light emitting elements disposed between the plurality of alignment electrodes. Each of the plurality of light emitting elements includes a first end having a first polarity, and a second end having a second polarity different from the first polarity. An orientation of the light emitting elements in the first sub-pixel and an orientation of the light emitting elements in the second sub-pixel are symmetrical. The first sub-pixel includes an identification pattern for distinguishing the first sub-pixel from the second sub-pixel.