Tiled Display Pad Structure for Seamless Screen Bonding
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Solution Overview
Problem
Display devices with large screens face issues of increased defect rates and reduced productivity due to seams between tiled displays, which detract from the immersive viewing experience.
Innovation Solution
A display device design that enhances conductivity and bonding strength between pad parts and lead electrodes by using protrusions on the pad and lead electrodes, ensuring seamless integration of multiple display devices through thermocompression or ultrasonic bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If display devices are tiled to create large screens, then screen size is increased, but visible seams appear between devices
Solution Approach 1:
The patent extracts the non-display areas and bezel areas from the visible display region by positioning them at the boundaries between tiled display devices. This removal of visible boundaries allows the display area to extend seamlessly across multiple devices, creating a large screen appearance without visible seams.
Solution Approach 2:
The patent introduces coupling members as intermediaries to connect adjacent display devices. These coupling members are positioned to bridge the gaps between devices, mechanically joining them while maintaining the visual continuity of the display area, thereby eliminating visible seams between tiled devices.
2Strength
If protrusions are added to pad part and lead electrode to improve bonding, then bonding strength increases, but device complexity increases
Solution Approach 1:
The pad part and lead electrode are segmented into multiple protrusions rather than using a single solid structure. This segmentation into discrete protruding elements increases the bonding surface area and creates multiple bonding points, thereby enhancing bonding strength while maintaining manufacturing feasibility through standardized patterning processes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively eliminates visible seams between display devices, allowing viewers to immerse themselves in images without being distracted by unsightly boundaries.
Implementation Method 1
ensuring seamless integration of multiple display devices through thermocompression or ultrasonic bonding
Implementation Method 2
ensuring seamless integration of multiple display devices through thermocompression or ultrasonic bonding
Data Source
AI summary
A display device comprises a substrate comprising a first contact hole, a barrier insulating layer disposed on the substrate and comprising a second contact hole, a fan-out line disposed in a first metal layer on the barrier insulating layer and comprising a pad part inserted into the second contact hole, a display layer disposed on the fan-out line, and a flexible film disposed below the substrate and having a lead electrode which is inserted into the first contact hole and bonded to the pad part. The pad part comprises a first base, a first protrusion integral with the first base and protruding from the first base, and a second protrusion protruding from the first protrusion.