Display Device Connection Wiring Dummy Structure
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Solution Overview
Problem
Display devices with connection wirings passing through the display area create visual distinctions due to reflection differences between areas with and without wirings, affecting bezel size and display quality.
Innovation Solution
The display device incorporates connection wirings that overlap gaps between dummy wiring portions, with a width of 1 µm to 5 µm, and includes driving voltage lines overlapping connection wirings, ensuring signal wirings are disposed below and pad electrodes are electrically connected, allowing the connection wiring area to blend with the surrounding area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If connection wirings pass through the display area to reduce the peripheral area, then the bezel size is reduced, but a pattern formed by reflection difference between areas with and without connection wirings is perceived by users
Solution Approach 1:
The patent applies local quality by creating a dummy wiring structure with specific local characteristics (gap portion) that matches the reflection properties of the connection wiring area. This localized modification allows the dummy wiring to compensate for the reflection difference only in the necessary area, preventing visual patterns while maintaining the connection wiring's signal transmission function.
Solution Approach 2:
The patent creates a copy of the connection wiring structure in the form of a dummy wiring that extends in the same direction and has a similar shape. This dummy wiring copy, with its gap portion, replicates the reflection characteristics of the connection wiring area, thereby masking the visual distinction between wired and unwired regions.
2Area of moving object
If the pixel electrode overlaps the gap between dummy wirings, then the display area utilization is improved, but the manufacturing precision requirement increases
Solution Approach 1:
The patent specifies a particular parameter range for the gap width (1 μm to 5 μm) to optimize both display area utilization and manufacturing feasibility. This parameter control allows the pixel electrode to effectively overlap the gap region while maintaining manufacturability within standard fabrication tolerances.
Data Source
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AI summary
A display device may include a first display area and a second display area adjacent to the first display area in a first direction. The display device may include driving elements, light-emitting elements that may include a pixel electrode electrically connected to a corresponding one of the driving elements, signal wirings that transfer a driving signal to the driving elements, and connection wirings that transfer a driving signal to signal wirings disposed in the second display area. At least one of the connection wirings may include a signal-transferring portion and a dummy portion. The signal-transferring portion and the dummy portion may extend in different directions to form a matrix having a disconnection portion. The pixel electrode may overlap the disconnection portion in an area where the connection wirings are disposed.