Display Substrate Shift Register Compact Arrangement
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Solution Overview
Problem
The existing AMOLED display panel designs face challenges in minimizing the frame width due to the layout of shift register units in the scan driving circuit, which affects the compact arrangement of devices and increases the frame width of the display substrate.
Innovation Solution
The proposed display substrate incorporates a scan driving circuit with shift register units where the output transistor and output reset transistor active layers are arranged along a specific direction, with optimized lengths and widths, and the use of a continuous semiconductor layer, along with strategically placed capacitors and signal lines, to reduce the area occupied by the shift register units, thereby narrowing the frame width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the scan driving circuit is arranged in the edge area of the AMOLED display panel, then the frame width is determined by this arrangement, but the frame width increases and compact arrangement is reduced
Solution Approach 1:
The active layers of the output transistor and output reset transistor are arranged along the first direction (length direction) instead of the second direction (width direction). This dimensional reorientation allows the transistors to extend along the length of the display panel rather than consuming width space, thereby reducing the frame width while maintaining proper device arrangement and functionality.
2Area of stationary object
If the active layers of output transistor and output reset transistor are arranged along the first direction with optimized dimensions, then the area occupied by shift register units is reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The patent specifies precise parameter ranges for the active layers: the length in the first direction is 1/3 to 1/11 of the width in the second direction, with the width being 12-40 microns. By optimizing these dimensional parameters, the design achieves compact arrangement while maintaining manufacturability within standard fabrication capabilities.
Solution Approach 2:
The active layers of the output transistor and output reset transistor are formed by a continuous first semiconductor layer that extends along the first direction. This merging of the semiconductor layer into a single continuous structure simplifies the manufacturing process and reduces precision requirements compared to forming separate layers, while still achieving the desired compact area.
Data Source
AI summary
The present disclosure provides a display substrate, a manufacturing method and a display device. At least one of the plurality of shift register units in the scan driving circuit includes an output circuit including an output transistor and an output reset transistor; a length of the active layer of the output transistor/the output reset transistor in the first direction is a first length/a second length, and a sum thereof is an output active length; a smaller one of minimum width of the active layer of the output transistor and the output reset transistor in a second direction is a first output active width, the first direction intersects the second direction; a ratio of the output active length to the first output active width is within a first predetermined ratio range greater than or equal to 3 and less than or equal to 11.