Adapter Component for Flexible Display Wiring Reliability
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Solution Overview
Problem
Flexible substrates and circuit boards in display devices often break when bent at large angles, leading to display failures due to wiring disconnection, which is a challenge in achieving narrow bezels and reliable display performance.
Innovation Solution
The display module incorporates an adapter component with a flexible substrate and pads that are electrically connected to the display panel and circuit board, allowing for secure signal line connections and preventing wiring breakage during bending, using materials like polyimide and polyethylene terephthalate for mechanical support and insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the flexible substrate or flexible circuit board is bent at a large angle to achieve narrow bezels, then the screen-to-body ratio is improved, but the wirings may break and the display function may fail
Solution Approach 1:
The patent divides the connection structure into multiple segments: the display panel, the adapter component, and the flexible circuit board are separated into distinct modules. Each module has its own substrate and pad structure, allowing independent optimization. The adapter component acts as an intermediate segment that bridges the rigid display panel and the flexible circuit board, enabling the system to achieve narrow bezels without compromising wiring reliability.
Solution Approach 2:
The adapter component serves as an intermediary element between the display panel and the flexible circuit board. It includes a flexible substrate with second pads that electrically connect to first pads on the display panel, and third pads that connect to the flexible circuit board. This intermediary structure allows the flexible circuit board to be bent at large angles while maintaining reliable electrical connections through the adapter's flexible substrate.
2Ease of manufacture
If multiple film layers including wirings are disposed in the bending region of the flexible substrate, then the electrical connections are established, but the wirings may break when large-angle bending occurs
Solution Approach 1:
The patent applies different structural qualities to different regions of the connection system. The adapter component's flexible substrate has a specific local structure with second pads positioned at particular locations to optimize both electrical connection and bending performance. The wirings in the bending region are configured with appropriate local characteristics (such as wiring layout and material properties) to maintain strength during large-angle bending while establishing necessary electrical connections.
Solution Approach 2:
The patent optimizes various parameters of the wiring structure in the bending region, including wiring layout, wiring material properties, and wiring thickness. By adjusting these parameters, the wirings can withstand large-angle bending forces while maintaining electrical connectivity. The flexible substrate's mechanical properties are also optimized to balance flexibility and structural integrity.
Data Source
AI summary
A display module and a display device are provided. The display module includes a main display area, an auxiliary display area, and a non-display area; a light-emitting surface; a display panel, an adapter component, and a flexible circuit board. The adapter component is disposed on a side of the substrate of the display module adjacent to the light-emitting surface and in a first non-display area. The adapter component includes a flexible substrate, a plurality of mutually insulated second pads and a plurality of mutually insulated third pads. The plurality of mutually insulated second pads and the plurality of mutually insulated third pads are all disposed on a side of the flexible substrate adjacent to the substrate; and the plurality of mutually insulated second pads are disposed on a side of the plurality of mutually insulated third pads adjacent to the main display area.