Display Device Fan-Out Wiring Bezel Reduction
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Solution Overview
Problem
Conventional display devices face challenges in minimizing the size of the bezel and peripheral areas due to the housing of driving units and wires, which limits the thickness of display panels despite consumer demand for sleeker designs.
Innovation Solution
The implementation of compact fan-out wiring structures in the peripheral area of the display panel, including bent structures made of the same material as gate or data lines, and serpentine signal transfer units on different layers, reduces the length and area of fan-out wirings, thereby minimizing the bezel and peripheral area sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If driving units and wires are housed in the peripheral area, then signal transmission is enabled, but the peripheral area size increases
Solution Approach 1:
The patent transitions from planar wiring layouts to three-dimensional stacked wiring structures. Multiple wiring layers are vertically stacked to route signals, allowing the peripheral area to be minimized while maintaining necessary signal transmission paths. This vertical dimensionality resolves the contradiction by eliminating the need for large horizontal space.
Solution Approach 2:
The patent implements nested wiring structures where multiple wiring layers are stacked vertically within the same footprint. The first wiring layer is positioned below the second wiring layer, creating a nested arrangement that packs signal transmission paths into a compact volume, thereby reducing the peripheral area while preserving signal transmission functionality.
2Shape
If bezel width is reduced, then device sleekness is improved, but housing space for driving units decreases
Solution Approach 1:
The patent moves driving units and wiring structures from the horizontal plane to the vertical dimension through multi-layer stacking. This allows the bezel width to be minimized while providing sufficient housing space for driving units in the vertical direction, resolving the contradiction between sleek design and functional space requirements.
Solution Approach 2:
The patent employs thin film transistor structures and thin wiring layers that can be stacked vertically. These thin-film components enable the housing of driving units within a compact vertical profile, allowing reduced bezel width while maintaining adequate space for electronic components.
3Area of stationary object
If fan-out wiring length is reduced, then peripheral area is minimized, but signal transmission effectiveness may be compromised
Solution Approach 1:
The patent uses vertical stacking of wiring layers to reduce the horizontal length of fan-out wirings while maintaining signal transmission effectiveness. By routing signals through multiple vertical layers, the wiring path becomes more compact in the peripheral area without compromising electrical performance.
Solution Approach 2:
The patent segments the fan-out wiring into multiple discrete layers, with each layer handling specific signal transmission tasks. This segmentation allows the total wiring length to be reduced through vertical stacking while maintaining effective signal transmission by distributing signals across multiple parallel paths.
Data Source
AI summary
A display device includes a display panel and a data driver. The display panel includes at least one gate line, at least two data lines, a display area including a pixel connected to the at least one gate line and the at least two data lines, and a peripheral area outside the display area, the peripheral area including a pair of fan-out wiring structures. The data driver is configured to apply data voltage to the at least two data lines. Each of the pair of fan-out wiring structures includes a bent structure, the bent structure of one of the pair of fan-out wiring structures includes the same material as the at least one gate line, and the bent structure of the remaining one of the pair of fan-out wiring structures includes the same material as the at least two data lines.