Display Device Dummy-Line Layout for Signal-Line Short-Circuit Prevention
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Solution Overview
Problem
Existing display devices face issues with short circuits between signal lines, which can lead to performance degradation and reliability concerns.
Innovation Solution
The display device incorporates a dummy line that overlaps and is connected to the first driving voltage line, positioned in the non-display area, with a floating state and wider width than the initialization voltage line, to prevent short circuits by distributing charge and reducing accumulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If signal lines are extended to the non-display area, then electrical connections are established, but short circuits may occur between overlapping lines
Solution Approach 1:
A dummy line is introduced as an intermediary element between the first driving voltage line and the initialization voltage line in the non-display area. The dummy line overlaps both signal lines and acts as a charge distribution mediator, preventing direct charge accumulation that would cause short circuits while maintaining the necessary electrical connections.
Solution Approach 2:
The dummy line is positioned in advance in the non-display area where the driving voltage line and initialization voltage line overlap. This preliminary structural arrangement ensures that charge is distributed along the dummy line before any short circuit condition can develop, proactively preventing the harmful effect rather than reacting to it.
2Productivity
If signal lines overlap in the non-display area, then routing efficiency is improved, but charge accumulation increases causing short circuits
Solution Approach 1:
The dummy line serves as a charge distribution intermediary that receives and redistributes electrical charge from the overlapping signal lines. By providing this intermediate charge pathway, the system maintains efficient overlapping routing while preventing dangerous charge accumulation that would compromise reliability.
Solution Approach 2:
The dummy line changes the charge distribution parameters in the overlapping region by providing an additional conductive pathway. This parameter change transforms the charge accumulation problem into a controlled charge distribution scenario, allowing the overlapping routing to maintain both efficiency and reliability.
Data Source
AI summary
The present disclosure relates to a display device, and more particularly, to a display device that can prevent a short circuit between signal lines. According to an embodiment of the disclosure, a display device comprising: a substrate having a display area and a non-display area; a pixel disposed in the display area; a first driving voltage line connected to the pixel in the display area, and extending to the non-display area; an initialization voltage line connected to the pixel in the display area, extending to the non-display area and overlapping the first driving voltage line in the non-display area; and a dummy line disposed in the non-display area, and overlapping the first driving voltage line.