Shift Register Unit Layout for Narrow Frame AMOLED Displays
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Solution Overview
Problem
Current display substrate designs for AMOLED panels face challenges in achieving a narrow frame due to the large space occupied by the gate drive circuit, including the reset control drive circuit array, which wastes layout space and hinders the implementation of a narrow frame design.
Innovation Solution
The display substrate incorporates a shift register unit with a specific layout where the first and second clock signal lines provide clock signals to control transistors, optimizing the circuit connection and structure layout to reduce the shift register unit's size in the peripheral region, allowing for a narrower frame while maintaining display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the gate drive circuit is directly integrated on the thin film transistor array substrate to form GOA, then the driving capability of gate lines is improved, but the layout space occupied by the shift register unit increases, making it difficult to achieve a narrow frame
Solution Approach 1:
The patent applies dimensionality change by switching the orientation of the shift register unit's active layers from extending along the first direction (horizontal) to extending along the second direction (vertical). This vertical arrangement allows the shift register unit to be positioned closer to the display region while maintaining proper signal routing, thereby reducing the horizontal space occupation and enabling narrow frame design.
Solution Approach 2:
The patent introduces asymmetric layout by positioning the shift register unit at a specific location in the peripheral region and using non-uniform spacing between components. The active layers are arranged with specific distances from the clock signal lines, creating an asymmetric configuration that optimizes both signal transmission and space utilization, allowing the frame to be narrowed without compromising drive capability.
2Length of stationary object
If the shift register unit is positioned closer to the display region to reduce frame width, then the frame narrowness is improved, but the distance between active layers and clock signal lines decreases, potentially affecting signal transmission quality
Solution Approach 1:
By changing the orientation of active layer extension from horizontal to vertical, the patent creates a new spatial dimension for arranging components. This allows the shift register unit to be positioned closer to the display region (reducing frame width) while maintaining adequate vertical spacing between active layers and clock signal lines, thus preserving signal transmission quality through proper vertical separation rather than horizontal distance.
Solution Approach 2:
The patent applies local quality by differentiating the spacing requirements in different directions. Specifically, it controls the vertical distance (second direction) between active layers and clock signal lines to be within specific ranges (0-2 times the active layer size), while allowing horizontal positioning to be optimized for frame narrowing. This localized optimization ensures signal quality is maintained where needed while enabling frame reduction overall.
Data Source
AI summary
A display substrate, a manufacturing method thereof and a display device are provided. The display substrate includes a base substrate, and a shift register unit, a first clock signal line and a second clock signal line which are on the peripheral region of the base substrate; the first clock signal line and the second clock signal line extend along a first direction; an active layer of the first control transistor, an active layer of the second control transistor, and an active layer of the third control transistor respectively extend along a second direction, and the active layer of the first control transistor, the active layer of the second control transistor, and the active layer of the third control transistor are on a side of the first clock signal line and the second clock signal line close to the display region, and are arranged side by side in the first direction.