Tiled Display Interconnect Layout for Near-Invisible Panel Seams
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Solution Overview
Problem
Large-size display devices experience increased defect rates and decreased productivity due to the number of pixels, leading to seams between connected display devices in tiled configurations, which disrupt the sense of immersion in images.
Innovation Solution
The solution involves a tiled display device design where connection lines of a second display device extend into the display area of a first display device, connecting gate and data lines without the need for flexible films or drivers in the bonding areas, minimizing the visibility of seams and enhancing image immersion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple display devices are connected to form a tiled display device, then the screen size is increased, but seams become visible between display devices
Solution Approach 1:
The patent extracts and removes the bonding areas (flexible films, gate drivers, data drivers) from the bonding regions between adjacent display devices. By extending connection lines into the display area of adjacent devices and routing them below the second substrate, the harmful bonding areas are eliminated from the visible region, preventing seam formation while maintaining the tiled configuration.
Solution Approach 2:
The connection lines are routed from the bonding area into the display area of adjacent display devices, utilizing the third dimension (depth/below substrate) to hide connection structures. This dimensional transition allows connection lines to extend horizontally into adjacent devices while vertically remaining below the second substrate, making them invisible from the front view.
2Object-generated harmful factors
If connection lines extend into the display area of adjacent devices, then bonding areas are minimized, but manufacturing complexity increases
Solution Approach 1:
The connection lines are segmented into multiple portions: a first portion extending from the bonding area into the display area of an adjacent display device, and a second portion extending below the second substrate. This segmentation allows the connection lines to navigate around the second substrate and connect to signal lines without interfering with the display area visibility, reducing manufacturing complexity while achieving the hidden bonding area effect.
3Object-generated harmful factors
If flexible films and drivers are removed from bonding areas, then seam visibility is reduced, but connection reliability must be maintained
Solution Approach 1:
The connection lines serve as intermediaries that extend from the bonding area into the display area of adjacent display devices, providing electrical connection without requiring flexible films or drivers in the bonding areas. These connection lines connect to signal lines (gate lines or data lines) that extend into contact openings, ensuring reliable signal transmission while eliminating visible bonding components.
Data Source
AI summary
A display device includes: a first substrate; a second substrate on the first substrate and exposing a first edge portion of the first substrate, the second substrate protruding beyond a second edge portion of the first substrate; a connection line on the first edge portion of the first substrate, the connection line having a first end portion protruding beyond a first side of the second substrate and a second end portion covered by the second substrate; and a thin-film transistor layer on the second substrate and connected to the connection line. The thin-film transistor layer includes signal lines extending from the first side to a second side of the second substrate. The signal lines extend into contact openings in the thin-film transistor layer and are exposed at a lower part of the second substrate on the second side of the second substrate.