Display Device Repair Line Overlap with Dummy Line
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Solution Overview
Problem
Liquid crystal display (LCD) devices face disconnection issues with long data lines during manufacturing, which existing technologies fail to effectively repair, leading to performance degradation and potential device failure.
Innovation Solution
Incorporation of a repair line and dummy line in the display device's non-display area, where the repair line overlaps with the data line and dummy line, allowing for electrical connection and signal restoration through laser irradiation, enabling the repair of disconnected data lines without altering the display area's structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a repair line is added to repair disconnected data lines, then the reliability of the display device is improved, but the device complexity increases due to additional components and structures
Solution Approach 1:
The repair line is nested within the non-display area, overlapping with the data line and link line in a compact configuration. This allows the repair functionality to be integrated into the existing structure without adding significant external components, thus improving reliability while minimizing the increase in device complexity.
Solution Approach 2:
The repair line utilizes the vertical stacking dimension by overlapping with the data line and link line in the non-display area. Instead of extending the repair line horizontally across the display area, it uses the vertical layering to achieve electrical connection, thereby reducing the occupied area and minimizing structural complexity.
2Reliability
If the repair line is placed in the non-display area overlapping the data line, then the display area structure is preserved, but the manufacturing precision requirements increase due to precise overlapping alignment
Solution Approach 1:
The repair line is pre-configured in the non-display area with predetermined overlapping positions relative to the data line and link line. This preliminary arrangement allows for precise alignment to be established during the manufacturing process before the device is assembled, ensuring that the repair line correctly overlaps with the signal lines without requiring complex real-time alignment procedures.
3Reliability
If the dummy line is added to overlap the repair line, then the repair effectiveness is improved through laser irradiation, but the device complexity increases due to additional components
Solution Approach 1:
The dummy line serves as an intermediary element that overlaps with the repair line in the non-display area. During laser repair, the dummy line acts as a mediator that receives and guides the laser irradiation to the repair line, enabling effective repair of disconnected data lines. This intermediary approach improves repair capability while keeping the additional component count minimal.
4Area of stationary object
If the repair line occupies minimal area in the non-display area, then the substrate size is reduced, but the ease of repair decreases due to limited space for repair operations
Solution Approach 1:
The repair line utilizes the vertical stacking dimension by overlapping with the data line and link line, rather than extending horizontally. This dimensional approach allows the repair line to achieve the necessary electrical connection while occupying minimal area in the non-display area, thus reducing substrate size while maintaining accessibility for repair operations through the vertical layering structure.
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
The solution allows for efficient repair of disconnected data lines, maintaining display performance and reducing substrate size by minimizing the occupied area of repair lines, thus extending the device's lifespan and reliability.
Implementation Method 1
a laser beam is irradiated to an overlap area among the link line, the repair line, and the data line, thereby melting an insulating layer and conductive layers
Implementation Method 2
melting an insulating layer and conductive layers
Data Source
AI summary
A display device includes a first substrate, a second substrate, a gate line, a data line, a link line, a driving integrated circuit, a repair line, and a dummy line. The second substrate is spaced apart from the first substrate. The gate line is on the first substrate. The data line is on the first substrate. The link line is connected to one of the gate line and the data line. The driving integrated circuit is connected to the link line. The repair line is in a non-display area of the first substrate. The repair line overlaps, in the non-display area, the link line and the one of the gate line and the data line. The dummy line overlaps the repair line. Shapes of the dummy line and the repair line are substantially equivalent.