Bezel-Less Display Panel TFT Layout for Seamless Spliced Screens
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Solution Overview
Problem
Conventional display panels with outer frames result in a low screen aspect ratio and visual imperfections due to splicing marks when forming large-sized displays, adversely affecting display performance.
Innovation Solution
A bezel-less display panel design with a first display area, a second display area around the first, and a third display area, where subpixel driving TFTs in the first and second areas have equal distribution density, and light-emitting subpixels in the first area have a higher density than in the second, with metal lines connecting subpixels across areas to eliminate the need for subpixel driving TFTs in the third area, thereby preventing splicing marks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple small-sized panels are spliced into a large-sized display, then the display size requirement is met, but the screen aspect ratio is reduced and splicing marks appear
Solution Approach 1:
The display panel is segmented into three display areas with different subpixel driving TFT densities. The first display area has a higher density of subpixel driving TFTs compared to the second and third display areas, allowing each segment to be optimized independently while maintaining overall display quality and eliminating the need for visible borders between segments.
Solution Approach 2:
Different regions of the display panel are assigned different qualities in terms of subpixel driving TFT distribution density. The first display area (center region) has a higher density to provide superior display quality where it is most visible, while the second and third display areas (peripheral regions) have lower density, optimizing the overall screen aspect ratio and reducing splicing marks without compromising critical viewing areas.
2Area of stationary object
If multiple small-sized panels are spliced into a large-sized display, then the display size requirement is met, but splicing marks appear causing visual imperfections
Solution Approach 1:
Different regions of the display panel are assigned different qualities in terms of subpixel driving TFT density. The first display area (center region) has a higher density to provide superior display quality where it is most visible, while the second and third display areas (peripheral regions) have lower density, optimizing the overall screen aspect ratio and reducing splicing marks without compromising critical viewing areas.
Solution Approach 2:
The patent merges the driving functions across multiple display areas by having subpixel driving TFTs in the first display area connect to light-emitting subpixels in the second and third display areas through metal lines. This integration creates a unified display surface that eliminates visible splicing marks while maintaining large display size.
Data Source
AI summary
A bezel-less display panel, a display device, and a spliced display device are disclosed. The bezel-less display panel includes a first display area, a second display area around the first display area, and a third display area around the second display area. The third display area is not provided with a subpixel driving thin-film transistor. Some of driving thin-film transistors in the second display area are connected to light-emitting subpixels in the third display area through a plurality of metal lines.