Frameless Display Device with Backside Drive Circuit Board
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Solution Overview
Problem
Conventional display devices face challenges in achieving frameless displaying due to the space occupied by the flexible connection circuit and drive circuit board, which increases the frame area and reduces the effective display zone.
Innovation Solution
A frameless display device design where a conductive connection body is formed on a substrate with vias in both the protective layer and substrate, allowing the flexible connection circuit and drive circuit board to be positioned at the backside without occupying the display area, enabling electrical connections through these vias.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the flexible connection circuit and drive circuit board are arranged on the front side of the substrate, then electrical connection is achieved, but the frame area increases and effective display zone is reduced
Solution Approach 1:
The patent moves the drive circuit board and flexible connection circuit from the front side (2D plane) to the back side of the substrate, utilizing the third dimension (depth/thickness) to resolve the spatial conflict. This allows the front surface to be fully utilized for display while connections are established through vias from the back side, achieving frameless display without compromising connection functionality.
2Area of stationary object
If the flexible connection circuit is set around the edge of the substrate, then electrical connection is established, but the frame area is expanded
Solution Approach 1:
The patent extracts the flexible connection circuit and drive circuit board from the front display area and relocates them to the back side of the substrate. By taking out these connection elements from the critical front surface, the invention eliminates the need for frames or bezels, allowing the entire front surface to serve as the effective display zone.
3Area of stationary object
If a connection zone is specifically allocated for the flexible connection circuit, then electrical connection is achieved, but the area is reduced for effective displaying
Solution Approach 1:
The patent eliminates the need for a separate connection zone on the front surface by establishing connections through vias from the back side. This dimensional approach allows the connection zone to be integrated into the back surface area, which does not compete with the effective display zone on the front surface, thereby maximizing display area while maintaining manufacturing feasibility.
Data Source
AI summary
A frameless display device includes a conductive connection body formed on a substrate. A first via is formed in a protective layer and located above the conductive connection body. A second via hole is formed in the substrate and located under the conductive connection body. A circuit layout layer is connected through the first via with the conductive connection body and a flexible connection circuit connected to a drive circuit board is connected through the second via with the conductive connection body thereby achieving electrical connection between the drive circuit board and the circuit layout layer. The flexible connection circuit and the drive circuit board are both arranged at a back side of the substrate without occupying an effective display zone.