Tiled Display Bridge Electrodes Seam Visibility
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Solution Overview
Problem
Tiled displays with large screens face issues of visible seams between adjacent display devices, disrupting viewer immersion due to non-display areas and bezel areas, which affect productivity and reliability.
Innovation Solution
The implementation of bridge electrodes in the seams between adjacent display devices to couple connection lines, eliminating the need for pad units and flexible films in these areas, allowing the display devices to be closely aligned and reducing seam visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If display devices are coupled to form a tiled display, then large screen area is achieved, but visible seams appear between adjacent display devices
Solution Approach 1:
The invention extracts and removes the harmful non-display areas (bezel areas) from between adjacent display devices by implementing bridge electrodes that extend into the seam regions. This eliminates the traditional gap-filling structures that create visible boundaries, allowing display areas to directly abut each other without visible seams while maintaining the large tiled screen area.
Solution Approach 2:
The invention extends connection lines and bridge electrodes into the seam region (a spatial dimension between display devices), transforming the seam from a visible boundary into a functional connection zone. This dimensional extension allows electrical connections to traverse the seam area, enabling display areas to be positioned closer together and reducing visible boundaries.
2Device complexity
If non-display areas and bezel areas are included between display devices, then electrical connections are simplified, but seam visibility increases and viewer immersion is disrupted
Solution Approach 1:
The invention merges the connection function with the seam region itself. Instead of having separate bezel areas for mechanical support and connection, the bridge electrodes are positioned within the seam regions, combining the electrical connection function with the boundary space between display devices. This integration eliminates the need for additional non-display areas while maintaining connection functionality.
Solution Approach 2:
The seam regions serve multiple functions simultaneously: they provide mechanical spacing between display devices, contain the bridge electrodes for electrical connections, and act as transition zones for light reflection. This multi-functionality eliminates the need for separate non-display areas, reducing overall seam visibility while maintaining all necessary functions.
3Object-affected harmful factors
If bridge electrodes are implemented in seams, then seam visibility is reduced, but manufacturing complexity increases
Solution Approach 1:
The bridge electrodes are formed during the thin-film transistor fabrication process itself, using the same sequential deposition and patterning steps that create the TFT structures. Connection lines and bridge electrodes are formed in predetermined patterns before final assembly, allowing precise positioning in seam regions without requiring additional manufacturing steps or complex alignment procedures during assembly.
Data Source
AI summary
Provided is a tiled display. The tiled display includes: a first display device including a first display area including pixels, a second display device including a second display area including pixels adjacent to the first display area, and a seam between the first display area and the second display area. Each of the first display device and the second display device includes: a first base part supporting a respective one of the first display device and the second display device, a thin-film transistor layer on the first base part, the thin-film transistor layer including thin-film transistors included in the pixels and including connection lines in the seam, and bridge electrodes in the seam to couple between the connection lines of the first display device and the second display device.