Gate Drive Circuit Shift Register Reduction
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Solution Overview
Problem
Conventional gate drive circuits require a large number of shift registers, leading to high costs and complex manufacturing processes.
Innovation Solution
A gate drive circuit design that uses m switch groups, n first shift registers, and m second shift registers, where each switch group includes n first switch units connected to a gate-line, and the shift registers output row-scan signals to control the switch units, reducing the total number of shift registers needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a shift register is provided for each row of pixel units, then the gate drive circuit can drive each row successfully, but the cost increases and the manufacturing process becomes complicated
Solution Approach 1:
The gate drive circuit is segmented into multiple switch groups (first switch groups and second switch groups), where each group controls a subset of gate lines. This segmentation allows the use of fewer shift registers (first and second shift registers) to control multiple switch groups, thereby reducing the total number of shift registers from N (one per row) to a smaller number while maintaining reliable gate drive capability across all pixel rows.
2Manufacturing precision
If a shift register is provided for each row of pixel units, then complete row-scan control is achieved, but the manufacturing process becomes complicated
Solution Approach 1:
Multiple switch groups are controlled by a reduced number of shift registers through shared control nodes. The first switch groups and second switch groups are merged into a unified control structure where first shift registers and second shift registers collectively manage all gate lines. This merging reduces the total component count and simplifies the manufacturing process while preserving precise row-scan control capability.
3Adaptability or versatility
If N shift registers are used for N scan lines, then each gate line can be controlled independently, but the cost increases
Solution Approach 1:
The first shift registers and second shift registers are designed to serve multiple functions by controlling multiple switch groups. Each shift register can control multiple gate lines through the switch group architecture, making the shift registers universal components that perform multiple control tasks. This multi-functionality reduces the total number of shift registers needed while maintaining independent control capability for each gate line.
Data Source
AI summary
The present application provides a gate drive circuit, a drive device and a display device. The gate drive circuit includes m switch groups, n first shift registers and m second shift registers. Each switch group includes n first switch units. The n first shift registers cyclically output a first row-scan signal, while each second shift register controls the n first switch units connected to each first controlled node corresponding to the second shift register to be turned on, so that the first row-scan signal is fed back to each gate-line in turn, to realize a line-by-line scan driver. The gate drive circuit only needs n+m shift registers to complete the gate drive, compared with the existing gate drive circuit requiring n×m shift registers, the number of shift registers is reduced, the cost is reduced and the manufacturing process is simplified.