Display Device Narrow Frame via Integrated Substrate Overlap
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Solution Overview
Problem
Existing display devices face challenges in minimizing the frame width due to the restrictions in disposing flexible substrates for both display panels and touch panels, which limits their compact design and functionality.
Innovation Solution
The display device incorporates a first substrate with a first terminal portion and a second substrate with a protruding portion and a second terminal portion, where the second substrate overlaps the first substrate via a gap held by a holding layer, allowing for a narrower frame by optimizing the layout and connection of terminals and substrates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If flexible substrates for display panel and touch panel are disposed separately, then connection reliability is improved, but frame width increases
Solution Approach 1:
The patent combines the display panel and touch panel into a single integrated structure where the touch panel is formed on the same substrate as the display panel. The terminal portions of both panels are disposed on the same flexible substrate, merging what were previously separate components into one unified assembly. This integration maintains connection reliability while eliminating the need for separate flexible substrate arrangements that would increase frame width.
Solution Approach 2:
The touch panel is nested on top of the display panel substrate, with the terminal portions arranged in an overlapping or adjacent configuration on the same flexible substrate. This nesting approach allows both panels to share the same structural foundation and connection interface, reducing the overall frame width while maintaining reliable electrical connections for both display and touch functionality.
2Length of stationary object
If frame width is reduced, then device compactness is improved, but flexibility substrate disposal becomes restricted
Solution Approach 1:
The patent transitions from a planar arrangement of separate flexible substrates to a three-dimensional integrated structure where terminal portions are stacked or closely arranged in the vertical dimension. By utilizing the vertical space and overlapping configurations, the design achieves narrow frame width while maintaining adequate space for flexible substrate routing and connection, thus preserving manufacturing feasibility.
Solution Approach 2:
The patent applies different structural configurations to different regions of the device. The display area maintains full functionality, while the frame region incorporates the integrated terminal portions with optimized spacing and arrangement. This localized optimization allows frame width reduction without compromising the overall flexibility substrate disposal and connection reliability.
3Length of stationary object
If terminal portions are closely arranged, then frame width is reduced, but connection reliability may deteriorate
Solution Approach 1:
The patent segments the terminal portions into distinct functional groups - display panel terminals and touch panel terminals - arranged in specific patterns on the flexible substrate. This segmentation allows for optimized spacing within each group and appropriate separation between groups, maintaining reliable connections while achieving compact overall arrangement that reduces frame width.
Data Source
AI summary
A display device is provided and including first and second substrates, wherein the first substrate includes a first area, a second area overlapping the second substrate, a first edge extending in a first direction, a first terminal portion on the first area; the second substrate has a first protruding portion protruding toward the first edge of the first substrate and a second edge including a linear portion along the first edge and a curved portion connected to the linear portion and extending toward the first edge, the curved portion constitutes a part of a edge of the first protruding portion, and a width in the first direction of the first protruding portion gradually decreases toward the first edge.