Display Wiring Layout With Chamfered Routing to Prevent Short-Circuits
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Solution Overview
Problem
Display devices face reliability issues due to short-circuits between wirings in the non-display area, particularly in the overlapping regions of common voltage supply wiring, driving voltage supply wiring, and data voltage supply wiring, which can lead to defects and reduced performance.
Innovation Solution
The display device incorporates a substrate with a non-display area featuring common voltage supply wiring and driving voltage supply wiring that include chamfered areas, and data voltage supply wiring in different layers, with insulating layers and metal layers strategically positioned to prevent short-circuits. The data voltage supply wiring extends in a direction different from the main extension directions of the common and driving voltage supply wiring, and the chamfered areas are designed to avoid overlap with the fine wiring, ensuring electrical insulation and preventing short-circuit defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If common voltage supply wiring and driving voltage supply wiring are disposed in the non-display area, then electrical connection is achieved, but short-circuit risk increases due to wiring overlap
Solution Approach 1:
The patent introduces a multi-layer structure where data voltage supply wiring is disposed in a third layer different from the first layer containing common and driving voltage supply wiring. This dimensional separation in the vertical direction prevents planar overlap and eliminates short-circuit risks while maintaining electrical connectivity functionality.
Solution Approach 2:
The patent introduces insulating layers as intermediary elements between different voltage supply wirings. These insulating layers act as mediators that prevent direct contact between conductive elements, thereby eliminating short-circuit paths while allowing the wirings to maintain their electrical supply functions.
2Reliability
If data voltage supply wiring is added to connect pixels, then pixel electrical connection is improved, but wiring complexity increases
Solution Approach 1:
The patent resolves wiring complexity by utilizing a third layer for data voltage supply wiring, separating it vertically from the first layer containing common and driving voltage supply wiring. This dimensional organization allows multiple wiring functions to coexist without planar interference, simplifying the overall wiring architecture while maintaining comprehensive electrical connectivity.
3Manufacturing precision
If chamfered areas are introduced in voltage supply wiring, then manufacturing precision is improved, but wiring design complexity increases
Solution Approach 1:
The patent applies chamfered areas locally at specific regions where voltage supply wirings make contact or intersect, rather than throughout the entire wiring structure. This localized application of chamfered geometry provides manufacturing precision benefits at critical points while minimizing overall design complexity.
Data Source
AI summary
A display device includes a substrate including a display area and a non-display area, a plurality of pixels disposed in the display area, a common voltage supply wiring overlapping the non-display area and disposed on the substrate, a driving voltage supply wiring overlapping the non-display area and disposed on the substrate, and a data voltage supply wiring overlapping the non-display area and electrically connected to the plurality of pixels, where at least one of the common voltage supply wiring and the driving voltage supply wiring includes a chamfered area, the data voltage supply wiring includes a first data voltage supply wiring, a second data voltage supply wiring, and a third data voltage supply wiring, and the first to third data voltage supply wirings are disposed in different layers.