Display Device Dummy Patterns Prevent Light Leakage
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Solution Overview
Problem
In display devices, pattern loss occurs at the exposure boundary region due to light leakage during the exposure process, leading to defective signal transmission and line formation.
Innovation Solution
The formation of dummy patterns near the edge of the substrate in regions that do not overlap with printed circuit films prevents light leakage and ensures stable formation of signal lines by reducing exposure boundary region issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If multiple layers are patterned using masks and exposure process for each panel area, then manufacturing capability is improved, but light leakage occurs at exposure boundary regions causing pattern loss
Solution Approach 1:
The patent applies preliminary action by forming a dummy pattern in the exposure boundary region before the actual patterning process. This dummy pattern serves as a preventive measure to block light leakage that would otherwise cause pattern loss during subsequent exposure processes, thereby ensuring accurate pattern formation without compromising manufacturing capability.
2Productivity
If exposure process is performed at boundary regions between panel areas, then manufacturing efficiency is improved, but light leakage causes pattern loss leading to defective lines
Solution Approach 1:
The patent converts the harmful effect of light leakage into a beneficial outcome by strategically placing a dummy pattern in the exposure boundary region. The dummy pattern absorbs or blocks the leaked light that would otherwise cause pattern loss, transforming the harmful light leakage into a controlled process that actually protects the signal transmission lines from defects.
3Manufacturing precision
If dummy patterns are formed near printed circuit films, then pattern loss is prevented, but device complexity increases
Solution Approach 1:
The patent applies local quality by placing the dummy pattern only in the specific exposure boundary region where light leakage occurs, rather than throughout the entire device. This localized approach prevents pattern loss at critical boundaries while minimizing the increase in overall device complexity, as the dummy pattern is confined to a specific area near the printed circuit films.
Data Source
AI summary
Disclosed are a display device for preventing loss of line patterns and a method of manufacturing the display device. The display device includes a substrate having an active area, a non-active area, and a pad portion formed at one side of the non-active area, printed circuit films disposed in the pad portion so as to be spaced a first distance apart from an edge of the substrate in a first direction and to be spaced apart from each other in a second direction that intersects the first direction, a first-layer line and a second-layer line disposed within the first distance between the printed circuit films and the edge of the substrate so as to be spaced apart from each other in the first direction, and island-shaped dummy patterns disposed in the same layer as the second-layer line in a region between two adjacent ones of the printed circuit films.