Tiled Display Pad Overlap Layout for Narrower Seams
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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
A tiled display design where the pad area of one display device overlaps the display area of an adjacent device in the thickness direction, with non-display areas of different widths to minimize seams and eliminate the need for hole-forming processes.
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 (z-axis) rather than being placed on the upper surface (x-y plane). This dimensional transition allows the pad area to be located on the rear surface of the substrate, enabling the non-display area to extend to the edge and reduce seam visibility without increasing lateral complexity.
2Shape
If the pad area is formed on the rear surface of the substrate, then the seams between display devices are reduced, but a hole-forming process is required which may damage substrate layers
Solution Approach 1:
The non-display area is designed to extend to the edge of the substrate from the beginning, allowing the pad area to be formed on the rear surface without requiring subsequent hole-forming processes. This preliminary design arrangement eliminates the need for damaging post-processing steps while achieving the desired seam reduction.
3Shape
If the non-display area width is increased to reduce seams, then the visual integrity is improved, but the display area is reduced
Solution Approach 1:
The pad area is repositioned from the upper surface to the rear surface of the substrate, utilizing the thickness direction. This allows the non-display area to extend to the edge without consuming additional lateral space, thereby reducing seam visibility while maintaining the display area dimensions.
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.