Auxiliary Patterns for Transfer Line Identification in Display Devices
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Solution Overview
Problem
Current display device manufacturing processes face inefficiencies in identifying defects and maintaining display quality due to challenges in locating and ordering transfer lines, which affects repair and quality control.
Innovation Solution
Incorporating auxiliary patterns in gap spaces between transfer lines to form auxiliary marks, allowing for improved identification and grouping to provide information about transfer lines, thereby enhancing manufacturing efficiency and reducing dead space, which improves display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If transfer lines are spaced closely to increase pixel density, then display resolution is improved, but identification and location of transfer lines becomes difficult
Solution Approach 1:
Auxiliary patterns are introduced as intermediary elements between transfer lines to serve as identification markers. These patterns do not interfere with the electrical function of transfer lines but provide visual or detectable cues for locating and identifying transfer lines during manufacturing and repair processes.
Solution Approach 2:
Auxiliary patterns create a simplified representation or copy of the transfer line arrangement that can be easily detected. Instead of directly detecting the closely-spaced transfer lines, the system uses auxiliary patterns that replicate their positional information in a more detectable form.
2Loss of information
If auxiliary marks are formed using traditional methods, then identification information is provided, but manufacturing process complexity increases
Solution Approach 1:
The formation of auxiliary patterns is merged with the existing transfer line fabrication process. By using the same deposition and patterning steps to create both transfer lines and auxiliary patterns, the manufacturing process complexity is minimized while still providing identification information.
Solution Approach 2:
The auxiliary patterns serve multiple functions: they act as identification markers for transfer lines, provide alignment references for subsequent processing steps, and can serve as test structures for verifying fabrication quality. This multi-functionality reduces the need for separate dedicated identification structures.
3Difficulty of detecting and measuring
If auxiliary patterns are added between transfer lines, then identification capability is improved, but available gap space is reduced
Solution Approach 1:
Auxiliary patterns are placed only in specific locations within the gap spaces between transfer lines, rather than uniformly filling the entire gap. This localized placement provides identification capability while minimizing the reduction of available gap space for electrical isolation and signal integrity.
Data Source
AI summary
A display device includes a substrate, a plurality of pixels positioned in a display area on the substrate, a plurality of transfer lines configured to transfer signals or voltages to the pixels, the plurality of transfer lines extending in a first direction and being spaced apart from each other in a second direction perpendicular to the first direction, and a plurality of auxiliary patterns in at least one of a plurality of gap spaces defined between ones of the transfer lines adjacent to each other in the second direction, wherein a group of at least two auxiliary patterns of the plurality of auxiliary patterns defines an auxiliary mark on the substrate.