Flexible Display Array Substrate Back-Surface Wiring
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Solution Overview
Problem
Current flexible display panels have frames and peripheral wiring terminals, limiting the ability to achieve a frame-free full-screen display product, which is desired for enhanced user experience and market potential.
Innovation Solution
An array substrate design featuring a flexible base substrate with a thin film transistor and wiring terminals on opposite surfaces, where the transistor's electrode is connected to the wiring terminal through via holes, allowing for signal transmission without the need for peripheral wiring, and including signal wires and insulating layers to manage gate and data signal wires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If wiring terminals are disposed on the outer periphery of the display area, then signal transmission is achieved, but the display area is reduced and frames are required
Solution Approach 1:
The patent moves the wiring terminals from the peripheral plane (2D arrangement on the edge) to the back surface (introducing a third dimension/z-axis). This dimensional transition allows signal transmission functionality to be maintained while completely freeing up the peripheral display area, enabling frame-free full-screen displays.
Solution Approach 2:
Instead of placing wiring terminals on the front/peripheral area as conventionally done, the patent inverts the arrangement by placing them on the back surface of the substrate. This inversion resolves the conflict between display area maximization and wiring terminal functionality.
2Area of stationary object
If via holes penetrate the flexible base substrate to connect electrodes, then peripheral wiring is eliminated, but manufacturing complexity increases
Solution Approach 1:
The patent extracts the wiring terminal functionality from the front display area and relocates it to the back surface. By using via holes to penetrate the substrate and connect back-surface terminals to front-surface electrodes, the complex connection structure is confined to the substrate thickness dimension, leaving the display area completely clear.
3Stability of the object's composition
If frames are used to support wiring terminals, then structural stability is achieved, but the frame-free full-screen display cannot be realized
Solution Approach 1:
The patent relocates wiring terminals from the 2D peripheral plane to the 3D back surface space. This dimensional shift eliminates the need for frames while maintaining structural stability through the substrate's own thickness dimension, allowing the entire front surface to be used for display.
Data Source
AI summary
The present disclosure provides an array substrate, a manufacturing method thereof, a flexible display panel, and a display device, all for achieving a frame-free full-screen flexible display product. The array substrate provided in the present disclosure comprises a flexible base substrate, a thin film transistor on a first surface of the flexible base substrate, and a wiring terminal for transmitting a signal to an electrode of the thin film transistor on a second surface of the flexible base substrate opposite to the first surface. The electrode of the thin film transistor is electrically connected to the wiring terminal through a via hole penetrating the flexible base substrate.