Tiled Display Pad Stacking Layout for Reduced Seam Visibility
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Solution Overview
Problem
Tiled displays with multiple display devices experience visible seams due to non-display areas or bezel areas, and forming holes in the substrate for pad areas can cause physical damage to layers.
Innovation Solution
The seams between display devices are reduced by overlapping the pad area of one display device with the display area of an adjacent device in the thickness direction, and adjusting the widths of non-display areas to minimize visibility, without requiring a hole-forming process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the pad area is located on the upper surface of the end side of the substrate, then the structure is simpler, but the seams between display devices become larger
Solution Approach 1:
The pad area is positioned to overlap the adjacent display device in the thickness direction (vertical dimension) rather than extending in the planar dimension. This vertical stacking approach allows the pad area to be located on the upper surface while minimizing its horizontal footprint, thereby reducing visible seams between tiled display devices without increasing structural complexity
2Shape
If the pad area is formed on the rear surface of the substrate, then the seams between display devices are reduced, but an additional hole-forming process is required which may cause physical damage to layers
Solution Approach 1:
The pad area is pre-positioned on the upper surface of the substrate in the initial substrate structure, rather than requiring subsequent hole-forming operations. This preliminary positioning eliminates the need for additional manufacturing steps that could damage layers, while still achieving reduced seam visibility through proper overlapping arrangement
Solution Approach 2:
The pad area is extracted from the traditional rear-surface location and repositioned to the upper surface, eliminating the need for hole-forming processes. This extraction allows the pad area to be integrated into the front-side structure, simplifying manufacturing while maintaining aesthetic appearance
3Shape
If the non-display area width is increased to hide seams, then seam visibility is reduced, but the display device area is reduced
Solution Approach 1:
Instead of increasing the horizontal width of non-display areas to hide seams, the solution utilizes the vertical dimension by positioning the pad area to overlap the adjacent display device in the thickness direction. This approach reduces seam visibility without consuming additional horizontal display area
Data Source
AI summary
A tiled display includes a plurality of display devices, where a display area and a non-display area surrounding the display area are defined in each of the plurality of display devices, and a pad area is defined in the non-display area. The plurality of display devices includes a first display device and a second display device disposed adjacent to the first display device in a first direction, and the pad area of the first display device overlaps the display area of the second display device in a thickness direction.