Shift Register Gate Driving Circuit for Narrower Display Frames
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Solution Overview
Problem
The frame width of AMOLED display panels is determined by the arrangement of the gate driving circuit in the non-display area, limiting the potential for a narrower frame design.
Innovation Solution
The gate driving circuit is redesigned with a layout that includes a continuous semiconductor layer forming multiple channel portions for transistors, allowing adjacent transistors to be coupled through conductive portions, and optimizing the arrangement of signal lines and transistors to minimize the occupied area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the gate driving circuit is arranged in the non-display area with conventional layout, then the circuit functionality is ensured, but the frame width of the display panel increases
Solution Approach 1:
The gate driving circuit is divided into multiple independent shift register units (first, second, third, and fourth shift register units) that can be arranged in a segmented manner in the non-display area. Each shift register unit processes specific row signals independently, allowing for optimized spatial distribution that reduces the overall frame width while maintaining full functionality.
Solution Approach 2:
The shift register units are arranged not only in the horizontal direction but also extended into the vertical direction of the non-display area. This two-dimensional arrangement strategy充分利用 the available non-display area, reducing the horizontal frame width by distributing circuit elements across multiple dimensions rather than concentrating them in a single linear arrangement.
2Adaptability or versatility
If more shift register units are added to drive more rows, then the driving capability is improved, but the area occupied by the gate driving circuit increases
Solution Approach 1:
Each shift register unit is designed with identical internal structure and functionality, capable of driving a specific number of row lines. This universal design allows the same circuit module to be replicated multiple times, providing scalable driving capability without increasing the area per unit. The circuit can be configured to drive different numbers of rows by simply changing the number of replicated units.
Data Source
AI summary
A display substrate includes a substrate and a gate driving circuit provided on the substrate; the gate driving circuit includes: a frame start signal line, a clock signal line, an inverted clock signal line, a first level signal line, a second level signal line, and a plurality of shift register units. The plurality of transistors at least include a first transistor, a second transistor, and a third transistor, active layers of the first, second and third transistors are formed by a continuous first semiconductor layer, the first semiconductor layer extends along a first direction; the first semiconductor layer includes at least three channel portions corresponding to the first transistor, the second transistor and the third transistor, and a conductive portion provided between adjacent channel portions, transistors corresponding to the adjacent channel portions are coupled to each other through a corresponding conductive portion.