Flexible Substrate Gate Driver On Array Circuit Narrow Frame Design
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Solution Overview
Problem
Existing OLED display technologies face challenges in achieving a narrow frame design due to the presence of Gate Driver on Array (GOA) circuits and peripheral circuitry, which hinder the reduction of frame width and impact the screen occupation ratio and user experience.
Innovation Solution
A substrate structure is developed with a base substrate, a wiring layer, a flexible layer, and a gate driver on array circuit stacked sequentially, featuring a through hole that penetrates the flexible layer to electrically connect the gate driver on array circuit to the wiring layer, reducing the frame width by partially covering the substrate and using a buffer layer for protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If Gate Driver on Array (GOA) circuits and peripheral circuitry are used, then the display device can be manufactured with standard processes, but the frame width increases and screen occupation ratio decreases
Solution Approach 1:
The patent moves the gate driver circuit from the traditional planar layout to a three-dimensional configuration by folding the flexible substrate. The flexible substrate is folded along a first folding line, and the gate driver circuit is formed on the folded portion, allowing the circuit to occupy vertical space rather than horizontal space. This dimensional transition enables the display device to achieve a narrow frame width while maintaining manufacturability through standard processes.
2Reliability
If the flexible layer is completely covered to protect the gate driver on array circuit, then reliability improves, but the frame width increases
Solution Approach 1:
The patent employs a nested structure where the flexible substrate is folded back onto itself, creating a compact configuration. The gate driver circuit is formed on the folded portion of the flexible substrate, which is nested within the overall display structure. This nesting approach allows the circuit to be protected while occupying minimal horizontal space, thereby reducing frame width without compromising reliability.
3Area of stationary object
If the frame width is reduced to achieve narrow frame design, then screen occupation ratio improves, but the connection between gate driver on array circuit and wiring layer becomes more difficult
Solution Approach 1:
The patent divides the flexible substrate into multiple segments or regions, with a specific folding line that separates the display area from the gate driver circuit area. This segmentation allows the gate driver circuit to be positioned on the folded portion while maintaining clear connection paths to the wiring layer through via holes formed in the flexible substrate. The segmented approach simplifies the connection structure despite the reduced frame width.
Data Source
AI summary
The A substrate includes a base substrate, a wiring layer, a flexible layer, and a gate driver on array circuit, which are sequentially stacked from bottom to top. One side of the wiring layer is provided with a through hole penetrating the flexible layer to expose the gate driver on array circuit, so that the gate driver on array circuit is electrically connected to the wiring layer with the through hole.