Shift Register Unit Segmentation for Narrow Frame Display
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Solution Overview
Problem
The larger size of driving TFTs in Gate Driver On Array (GOA) circuits hinders the narrow frame design trend of display panels due to increased layout space requirements, particularly in the non-display regions where these circuits are located.
Innovation Solution
The integration of a gate electrode driving circuit with multiple stages of shift register units on the array substrate, where driving modules are placed within the display region and logical modules in the non-display region, allowing for efficient signal transmission to gate lines while minimizing the non-display region's wiring space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the gate electrode driving circuit is integrated onto the array substrate using GOA circuit design, then the bonding region and peripheral wiring space are saved, but the driving TFT size increases which is not conducive to narrow frame design
Solution Approach 1:
The shift register unit is divided into two distinct modules: a driving module positioned in the display region and a logical module positioned in the non-display region. This segmentation allows the driving TFT to be smaller since it only needs to drive within the display region, while the logical module handles additional control functions in the non-display region, thus resolving the contradiction between reducing driving TFT size and saving wiring space.
Solution Approach 2:
The patent utilizes spatial distribution by placing different modules in different regions (display region vs. non-display region), effectively using the dimensional aspect of the substrate layout to separate functions. This spatial separation allows optimization of driving TFT size in the display region while utilizing the non-display region for additional wiring and control logic, thereby achieving narrow frame design without compromising functionality.
2Area of stationary object
If the driving module is placed in the display region, then the non-display region wiring space is reduced, but the layout complexity increases
Solution Approach 1:
By segmenting the shift register unit into driving and logical modules positioned in different regions, the patent simplifies the overall layout strategy. Each module has a defined location and function, making the layout more systematic and manageable despite the increased functional integration, thus reducing layout complexity while achieving wiring space reduction.
Solution Approach 2:
The driving module acts as an intermediary between the logical module and the gate lines within the display region. This intermediary structure facilitates organized signal transmission and simplifies the connection architecture, reducing layout complexity while effectively utilizing the non-display region for wiring space optimization.
Data Source
AI summary
An array substrate and a display device are disclosed. The array substrate (01) comprises a gate electrode driving circuit (10), the gate electrode driving circuit (10) includes at least two stages of shift register units (SR1-SRn), and each stage of the shift register units (SR1-SRn) is connected with a row of gate lines (Gate1-Gaten). The shift register units (SR1-SRn) include driving modules (D1-Dn) and logical modules (L1-Ln); the driving modules (D1-Dn) include a portion located in a display region (100) of the array substrate. The array substrate can solve a problem that a larger size of a driving TFT in a gate driver on array (GOA) circuit is not conducive to a narrow frame design trend of a display panel.