Signal Line Identification Pattern for Dense Display Panels
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Solution Overview
Problem
In display devices, identifying the line numbers of data lines and gate lines without increasing the distance between them is challenging, especially as pixel density increases and defects need to be easily checked and repaired in the non-display area.
Innovation Solution
A display device with a substrate and signal lines featuring identification patterns, such as relief patterns, symbols, letters, or numbers, formed by wide portions on the lines to identify line numbers without altering the line spacing, including protrusions that can be integral or overlapping with insulating layers, allowing for identification without increasing the distance between lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If identification patterns are added to signal lines to enable line number identification, then ease of repair is improved, but device complexity increases
Solution Approach 1:
The identification pattern utilizes the width dimension of the signal line to encode line number information through wide portions, rather than adding separate identification structures. This allows identification functionality to be integrated within the existing line geometry without increasing inter-line spacing.
Solution Approach 2:
The signal lines have non-uniform width with specific wide portions at designated locations to indicate line numbers, while the rest of the lines maintain their standard width and spacing. This localized modification provides identification capability without affecting the overall line density or requiring additional space between lines.
2Loss of information
If wide portions are added to signal lines for identification, then line number identification becomes possible, but manufacturing precision requirements increase
Solution Approach 1:
The wide portions are formed as integral parts of the signal lines during the same manufacturing process step, rather than being added as separate features. This ensures that the wide portions and the signal lines are formed simultaneously with consistent patterning conditions, reducing alignment and dimensional control complexities.
3Productivity
If signal lines are kept densely spaced, then pixel density can be maintained, but line number identification becomes difficult
Solution Approach 1:
The identification pattern creates visual contrast through width variation (wide portions versus standard width) that makes line number identification easier through optical detection methods, allowing identification without physical separation or increased spacing between lines.
Data Source
AI summary
A display device is provided. The display device comprises a substrate, pixels disposed on the substrate, and a plurality of signal lines for applying a signal to the pixels, the plurality of signal lines disposed on the substrate, the signal lines being spaced apart from one another and extending parallel to a first direction, and an identification pattern for identifying line numbers of the plurality of signal lines, wherein the identification pattern includes wide portions on one or more of the signal lines.