Display Device Dummy Wiring Patterns Luminance Uniformity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In display devices with a thin bezel structure, the passage of fan-out wires through the active area can lead to signal data order changes and luminance differences between regions due to process deviations in conductive layers, causing uneven luminance.
Innovation Solution
The display device incorporates connection wires passing through the active area with dummy wiring patterns and grooves to manage level differences and reflectance issues, using separate conductive layers for connection wires and dummy patterns to minimize perceived patterns and luminance variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If fan-out wires pass through the active area to accommodate thin bezel structure, then the bezel thickness is reduced, but luminance uniformity deteriorates due to process deviations in conductive layers
Solution Approach 1:
The patent applies local quality by creating dummy wiring patterns in specific regions where connection wires are not present. These dummy patterns are placed locally to compensate for reflectance differences in those particular areas, rather than uniformly across the entire display. This targeted approach addresses luminance non-uniformity in specific zones while maintaining the thin bezel design.
Solution Approach 2:
The patent changes physical parameters by creating level differences through dummy grooves and adjusting the thickness of the second insulating layer. By varying the thickness parameter (making the second portion thicker than the third portion), the patent compensates for level differences caused by disconnections, thereby maintaining luminance uniformity across different regions of the display.
2Adaptability or versatility
If connection wires and signal wires are arranged in different conductive layers, then wiring flexibility is improved, but level differences and reflectance variations are created causing visible patterns
Solution Approach 1:
The patent applies the color changes principle by manipulating light reflectance properties through dummy wiring patterns and level difference structures. By creating controlled reflectance variations that match the surrounding areas, the patent makes the level differences invisible to the human eye, effectively 'camouflaging' the structural variations caused by multi-layer wiring arrangements.
Solution Approach 2:
The patent uses copying by creating dummy wiring patterns that replicate the appearance and reflectance characteristics of actual connection wires. These dummy patterns are placed in regions where connection wires are absent, copying the visual properties of the wired regions to maintain overall uniformity and eliminate visible patterns.
3Manufacturing precision
If dummy wiring patterns are added to compensate for level differences, then luminance uniformity is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple functions into the dummy wiring patterns and second insulating layer. These structures simultaneously serve as electrical insulation layers, mechanical support structures, and optical compensation elements that hide level differences. By combining these functions, the patent reduces overall device complexity while achieving luminance uniformity.
Solution Approach 2:
The second insulating layer and dummy wiring patterns are designed with multi-functionality, serving both electrical insulation purposes and optical compensation purposes. This universal design approach allows a single structural element to address multiple problems (electrical isolation and luminance uniformity), thereby reducing the need for additional separate components and simplifying the overall device structure.
Data Source
AI summary
A display device includes a substrate comprising an active area and a non-active area a first data conductive layer disposed on the substrate and including signal wires connected to pixels, a first insulating layer disposed on the first data conductive layer, a second data conductive layer disposed on the first insulating layer and including a connection wire connected to some of the signal wires and dummy wiring patterns disconnected the signal wires, a second insulating layer disposed on the second data conductive layer and a pixel electrode disposed on the second insulating layer. The dummy wiring patterns are separated from one another at a disconnection, the second insulating layer includes a second portion disposed on the disconnection and a third portion disposed on at least a portion of the connection wire, and thicknesses thereof are different from each other.