Tiled Display Voltage Line Layout for Seamless Large Screens
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Solution Overview
Problem
Large-sized display devices face increased defect rates in light emitting elements, leading to reduced productivity and reliability, and the seams between tiled display devices cause a sense of disconnection, impairing immersion.
Innovation Solution
The design includes first and second voltage lines with specific configurations to minimize the non-display area and reduce resistance, with the first voltage line extending across edges and display areas, and connection lines connected through contact holes to stabilize voltage supply, minimizing seam visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the display device is manufactured in a large size, then the screen area is increased, but the defect rate of light emitting elements increases due to the increase in the number of pixels
Solution Approach 1:
The patent divides the large display device into multiple smaller display modules that are connected together to form the complete large-screen display. Each module contains its own light emitting elements and is manufactured separately, then assembled into the final large-scale display system. This segmentation allows each module to be produced with higher reliability while achieving the desired large overall screen area.
2Area of stationary object
If display devices are connected to form a tiled display, then the large-sized screen is implemented, but boundary portions called seams appear between display devices
Solution Approach 1:
The patent extracts and removes the non-display areas and bezel regions from the visible display surface. By minimizing or eliminating these boundary portions between adjacent display modules, the seams that normally appear in tiled displays are removed or significantly reduced, creating a seamless visual experience across the entire large-screen display.
Solution Approach 2:
The patent merges adjacent display modules by eliminating the visible boundaries between them. Through careful design of the module edges and removal of non-display areas, the individual modules are combined into a unified visual display that appears as a single continuous screen rather than separate tiled units.
3Area of stationary object
If the width of voltage line in non-display area is reduced, then the non-display area is minimized, but the resistance of voltage line increases
Solution Approach 1:
The patent transitions from two-dimensional planar voltage line configuration to a three-dimensional structure by stacking multiple voltage line layers vertically. This allows the voltage lines to occupy less horizontal space in the non-display area while maintaining sufficient cross-sectional area for low-resistance current flow through the multi-layer configuration.
Solution Approach 2:
The patent designs the voltage line structure to serve multiple functions simultaneously: it provides electrical power delivery while occupying minimal space in the non-display area, and the multi-layer configuration also serves as part of the overall device architecture that enables the reduced bezel design.
Data Source
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AI summary
A display device includes a first substrate including a display area and a non-display area adjacent to the display area, a first voltage line disposed on the first substrate and supplying a first voltage, a second substrate disposed on the first voltage line, and a thin film transistor layer disposed on the second substrate and comprising a plurality of thin film transistors and a second voltage line disposed in the non-display area and electrically connected to the first voltage line through a first contact hole penetrating the second substrate.