Bent Auxiliary Substrates for Display Non-Display Area Reduction
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Solution Overview
Problem
Modern display devices have a significant non-display area that is not utilized for image display, which is undesirable and can lead to increased size and potential damage from bending, especially in tiled display apparatuses where seams between panels can be visible.
Innovation Solution
The design incorporates a first and second auxiliary substrate that overlap and are bent in the non-display area, with a thinner auxiliary substrate configuration to minimize the non-display area and prevent damage, while also optimizing the placement of drivers and black matrices to reduce visibility and size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the non-display area is minimized, then the display device size is reduced and visibility is improved, but the structural integrity and durability may be compromised due to bending stresses
Solution Approach 1:
The auxiliary substrate is divided into a first auxiliary substrate and a second auxiliary substrate that are positioned at different locations. The first auxiliary substrate is located at the first right-or-acute angle relative to the first substrate, while the second auxiliary substrate is located at the second right-or-acute angle relative to the first substrate. This segmentation allows the non-display area to be minimized while maintaining structural integrity through distributed support.
Solution Approach 2:
The patent introduces auxiliary substrates positioned at right-or-acute angles relative to the main substrate, transitioning from a conventional planar support structure to a multi-dimensional configuration. This spatial arrangement provides structural reinforcement in multiple directions, enhancing durability while allowing the non-display area to be minimized.
2Length of stationary object
If the auxiliary substrate thickness is reduced, then the overall device profile is slimmer and manufacturing is easier, but the protective capability and structural strength may be insufficient
Solution Approach 1:
Instead of using a single thick auxiliary substrate, the patent employs multiple thinner auxiliary substrates (first and second auxiliary substrates) positioned at different locations and angles. This segmentation achieves the desired slim profile while distributing structural support across multiple components, preventing any single thin layer from bearing excessive stress.
Solution Approach 2:
The first and second auxiliary substrates work together in combination with the first substrate to provide comprehensive structural support. By merging the protective functions of multiple thin layers positioned strategically, the system achieves equivalent or superior strength to a single thick layer while maintaining a slimmer overall profile.
3Area of stationary object
If the auxiliary substrates are bent to overlap the non-display area, then the non-display area is effectively reduced and visibility is improved, but the manufacturing complexity increases
Solution Approach 1:
The auxiliary substrates are pre-formed with the necessary bent configurations and positioning features before final assembly. The first auxiliary substrate is pre-positioned at the first right-or-acute angle, and the second auxiliary substrate is pre-positioned at the second right-or-acute angle, allowing for simplified integration during manufacturing while achieving the desired overlapping configuration.
Solution Approach 2:
The auxiliary substrates are designed as flexible thin film structures that can be bent and conform to the required angular positions. This flexibility enables the substrates to overlap the non-display area effectively while maintaining manufacturability through standard flexible substrate processing techniques.
Data Source
AI summary
A display device includes a first substrate, a second substrate, a first auxiliary substrate, a second auxiliary substrate, and a display layer. The second substrate includes a display area and a non-display area. The display area overlaps the first substrate. The non-display area extends beyond the first substrate. The first auxiliary substrate includes a first section and a second section. The first section is between the first substrate and the display area. The second section overlaps the non-display area and is bent relative to the first section. The second auxiliary substrate includes a first part and a second part. The first part is between the first section and the display area. The second part overlaps the non-display area and is bent relative to the first part. The display layer is between the first section and the first part and includes pixels that overlap the display area.