Tiled Display Bonding Layout for Seamless Pixel Boundaries
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Solution Overview
Problem
Tiled display devices experience a sense of disconnection due to boundary portions or non-display areas between adjacent display units, which detracts from the immersion experience, especially in large-sized screens where defect rates increase with the number of pixels.
Innovation Solution
The design includes a bonding area between display devices with specific configurations of data lines, gate lines, and off-voltage lines, ensuring that the distance between pixels at the outermost sides of adjacent display devices is consistent with internal pixel distances, eliminating the visibility of the bonding area by matching reflectance and minimizing the non-display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple display devices are connected to form a large-sized screen, then the screen size is increased, but the sense of immersion is reduced due to visible boundary portions between display devices
Solution Approach 1:
The patent applies local quality by making the off voltage lines extend into the bonding area only at specific locations (between outermost pixels and inward pixels) rather than uniformly across all areas. This localized adjustment reduces the visible bonding area at critical positions while maintaining proper voltage distribution, thereby improving immersion sense without compromising the overall screen size benefit
Solution Approach 2:
The patent extends off voltage lines from the display area into the bonding area in the horizontal direction (first direction), adding a dimensional extension beyond the traditional display area boundary. This allows the electrical function to cover the bonding region, reducing its visibility and creating a seamless appearance across multiple display devices
2Ease of manufacture
If the bonding area between display devices is reduced, then the sense of immersion is improved, but the electrical connection reliability may be compromised
Solution Approach 1:
The patent applies local quality by selectively extending off voltage lines into the bonding area only where needed (between outermost pixels and inward pixels) rather than uniformly across all areas. This localized adjustment reduces the visible bonding area at critical positions while maintaining proper voltage distribution, thereby improving immersion sense without compromising the overall screen size benefit
Solution Approach 2:
The off voltage lines act as intermediaries that extend into the bonding area to provide electrical connection between display devices. By positioning these lines to extend into the bonding region, they serve as conductive pathways that maintain reliability while the bonding area itself remains minimized for aesthetic purposes
3Ease of manufacture
If off voltage lines are positioned between outermost pixels, then the bonding area visibility is reduced, but the line configuration complexity increases
Solution Approach 1:
The patent applies local quality by selectively extending off voltage lines into the bonding area only where needed (between outermost pixels and inward pixels) rather than uniformly across all areas. This localized adjustment reduces the visible bonding area at critical positions while maintaining proper voltage distribution, thereby improving immersion sense without compromising the overall screen size benefit
Solution Approach 2:
Instead of keeping off voltage lines entirely within display areas and accepting visible bonding regions, the patent inverts the approach by extending lines into the bonding area. This reversal of the conventional design paradigm allows the bonding area to be functionally integrated rather than merely concealed
Data Source
AI summary
Provided is a tiled display device. The tiled display device includes adjacent first and second display devices including a display area having pixels, a bonding area between the display areas of the first and second display devices, data lines extending in a first direction, first gate lines extending in the first direction, and configured to transmit a gate signal, and off voltage lines extending in the first direction, and configured to transmit an off voltage, wherein one of the off voltage lines is between a first pixel at an outermost side of the first display device and a second pixel located more inwardly than first pixel, and wherein the off voltage lines are not between a third pixel at an outermost side of the second display device and the first pixel.