Repairable Touch Lines in In-Cell Display Panels
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Solution Overview
Problem
In in-cell type display devices, deteriorated touch lines inside the display panel pose challenges for detection and repair due to their internal location, making it difficult to address issues like electric disconnection or electric shortage.
Innovation Solution
A display device design that includes a dummy region with a repair line and dummy pattern, allowing for electrical contact and repair of deteriorated touch lines through openings in the insulating layers, enabling a detour path for touch signals using a laser to reconnect touch lines, dummy patterns, and repair lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If touch lines are disposed inside the display panel in an in-cell type display device, then the thickness of the display device is reduced, but it becomes difficult to detect and repair deterioration of touch lines
Solution Approach 1:
The touch line system is segmented into multiple components: the original touch line, a dummy pattern extending from the touch block, and a repair line in the dummy region. This segmentation allows the repair path to be separated from the original touch line structure, enabling external access while maintaining the in-cell thin profile.
Solution Approach 2:
The repair capability is added in a different dimensional space by utilizing the dummy region located at the edge of the display panel. The repair line extends from the dummy pattern through openings in the insulating layers to the touch line, creating a three-dimensional repair path that bypasses the internal constraint while maintaining the thin overall structure.
2Device complexity
If touch lines are disposed inside the display panel in an in-cell type display device, then the overall structure is simplified, but deterioration detection and repair becomes complex
Solution Approach 1:
The dummy pattern serves as an intermediary element that provides access points to the touch line system. By extending from the touch block and connecting to the repair line through openings in the insulating layers, the dummy pattern creates an external interface for detecting and repairing touch line deterioration without complicating the internal touch line structure.
3Ease of repair
If a repair path is added for touch lines, then repairability is improved, but the device structure becomes more complex
Solution Approach 1:
The dummy pattern serves multiple functions: it acts as a structural element during normal operation, provides access points for repair through its extension to the edge region, and serves as a connection interface between the touch line and repair line. This multi-functionality adds repair capability without proportionally increasing structural complexity.
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
This solution simplifies the repair process and reduces costs by creating a new path for touch signals, effectively addressing touch line deteriorations such as electric disconnection or electric shortage without altering the touch line or block structure.
Implementation Method 1
the electric contact is formed by melting the gate insulating layer
Data Source
AI summary
Aspects of the present disclosure are directed to a display device having a repairable touch line. In one aspect, a display device includes a display panel including a plurality of touch blocks each having a touch electrode; a dummy region at one side of the display panel; a plurality of touch lines connected to the plurality of touch blocks and configured to apply a touch signal to the plurality of touch blocks; a repair line in the dummy region; and a dummy pattern in the dummy region.