Display Peripheral Layout Using Layered Fan-Out and Test Lines
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Solution Overview
Problem
Display devices face challenges in minimizing the non-display peripheral area while maintaining efficient signal transmission and power supply, which affects their thickness and usability.
Innovation Solution
The display device incorporates a fan-out unit in the peripheral area connected to data lines, with a common power supply line overlapping the fan-out unit, and includes a test circuit and data distribution circuit to optimize signal and power distribution, reducing the peripheral area by overlapping signal lines on different layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the peripheral area is reduced to make the display device thinner, then the device thickness is reduced, but signal transmission efficiency and power supply efficiency deteriorate
Solution Approach 1:
The patent applies dimensionality change by routing signal lines through different layers (first signal line on first layer, second signal line on second layer) to achieve three-dimensional spatial arrangement. This allows the peripheral area to be reduced while maintaining signal transmission efficiency through vertical stacking rather than horizontal expansion.
Solution Approach 2:
The fan-out unit is positioned to overlap with the common power supply line, creating a nested arrangement where one component is placed over another. This nesting strategy reduces the overall peripheral area occupation while maintaining functional integrity of both the power supply line and the fan-out unit.
2Reliability
If signal lines are arranged separately to avoid interference, then signal quality is maintained, but the peripheral area increases
Solution Approach 1:
The patent resolves signal interference while minimizing peripheral area by transitioning from two-dimensional separate arrangement to three-dimensional layered arrangement. The first signal line and second signal line are placed on different layers (first layer and second layer respectively), allowing them to overlap in the plan view while maintaining physical separation that prevents interference.
Solution Approach 2:
The patent merges the spatial occupation of multiple signal lines by allowing them to overlap in the peripheral area through vertical stacking. This combining strategy reduces the overall peripheral footprint while maintaining signal integrity through layer separation.
3Area of stationary object
If the fan-out unit is positioned to overlap with the common power supply line, then the peripheral area is minimized, but manufacturing complexity increases
Solution Approach 1:
The overlapping arrangement of the fan-out unit and common power supply line is achieved through vertical stacking on different layers rather than horizontal arrangement. This dimensional transition simplifies the manufacturing process compared to attempting to route lines around each other in the same plane, as layer stacking is a more straightforward fabrication approach.
Data Source
AI summary
A display device including: a substrate including a display area and a peripheral area adjacent to the display area; a plurality of data lines extending in a first direction in the display area; a fan-out unit arranged in the peripheral area and connected to the plurality of data lines; a first signal line arranged in the peripheral area; and a common power supply line arranged in the peripheral area and overlapping the fan-out unit.