Display Panel Edge Conductor Layout for Narrower Spliced Seams
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Solution Overview
Problem
The challenge in the field of large-screen display systems is the inability to completely eliminate the 'seam' in spliced liquid crystal display screens due to the fluidity of liquid crystals and the need for sealant placement, which limits the maximum size of a single display screen to 110 inches.
Innovation Solution
A display panel design featuring a first conductive portion on the side surfaces of the array and color filter substrates, connected with pixel circuits, and a conductive film layer for electrical communication, allowing for reduced bezel width and seamless integration of multiple panels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If liquid crystals are sealed within a specific region using sealant, then the liquid crystals are contained properly, but the sealant positions cannot be used for display and create visible seams in spliced screens
Solution Approach 1:
The patent extracts the sealant from the display surface area by positioning it at the edges of the liquid crystal layer, allowing the display region to extend to the very edges of the substrate without being interrupted by sealant lines, thus eliminating visible seams in spliced screens
Solution Approach 2:
The patent moves the sealant from a two-dimensional plane (where it would be visible on the display surface) to a three-dimensional edge position (at the perimeter of the liquid crystal layer), effectively hiding it from the display area and eliminating the seam problem
2Ease of manufacture
If a certain distance is reserved for glass cutting and grinding, then the display panel can be manufactured properly, but this causes a seam that cannot be completely eliminated in spliced screens
Solution Approach 1:
The patent merges the functional regions (display area, liquid crystal layer, and peripheral regions) to extend the display region to the very edges of the substrate, minimizing the non-display peripheral area and reducing the visible seam width in spliced screens while still allowing for necessary manufacturing processes
3Shape
If the peripheral region is reduced to eliminate seams, then spliced screens appear seamless, but the structural integrity and electrical connections may be compromised
Solution Approach 1:
The patent applies different functional qualities to different regions: the display region has high-quality liquid crystal and electrode structures for optimal display performance, while the peripheral region contains the necessary electrical connection structures (source/drain electrodes, wiring) and sealant, allowing each region to be optimized for its specific function
Solution Approach 2:
The patent segments the substrate into distinct functional regions (display region and peripheral region) with clear boundaries, allowing the display region to extend to the edges for seamless appearance while the peripheral region handles structural and electrical functions
Data Source
AI summary
Provided are a display panel and a manufacturing method thereof, a display device and a spliced display device. The display panel includes: a color filter substrate (11), an array substrate (12) and a first conductive portion (13), where a display region (AA) and a peripheral region (NA) are formed on the display panel, and the peripheral region (NA) surrounds the display region (AA); the array substrate (12) includes pixel circuits and a second conductive portion (14), where the pixel circuits are located in the display region (AA), and the second conductive portion (14) is located in the peripheral region (NA); the second conductive portion (14) is connected with the pixel circuits; the first conductive portion (13) is located on a side surface of the array substrate (12) and a side surface of the color filter substrate (11), and the first conductive portion (13) is connected with the second conductive portion (14). By such technical solutions, a width of the peripheral region can be reduced, which is beneficial to realizing a narrow bezel and increasing a screen-to-body ratio.