Gate Driving Circuit Reduces Input Terminals
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Solution Overview
Problem
Existing gate driving circuits for display panels are complex due to the need for dozens of thin film transistors connected to multiple driving signal input terminals, which complicates the structure and stability of the circuit.
Innovation Solution
A gate driving circuit with a multi-stage cascade gate driving unit that includes a pull-up control module, pull-up and pull-down nodes, and output modules, which reduces the number of driving signal input terminals needed by controlling the potential of these nodes through clock signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dozens of thin film transistors are used to ensure basic functions and stability, then the reliability of the gate driving circuit is improved, but the device complexity increases significantly
Solution Approach 1:
The patent combines multiple transistor functions into integrated modules. Specifically, the pull-up control module, pull-down control module, and output modules are designed as integrated units that work together to control the gate electrode potential, reducing the need for separate discrete transistor connections while maintaining circuit stability.
Solution Approach 2:
The gate driving unit is designed with multi-functional modules that perform multiple operations. The pull-up control module and pull-down control module can selectively control different output modules (first and second output modules) to drive different signal lines, allowing a single gate driving unit to serve multiple functions and reduce overall circuit complexity.
2Adaptability or versatility
If multiple driving signal input terminals are connected to ensure proper circuit operation, then the functionality of the gate driving circuit is improved, but the device complexity increases
Solution Approach 1:
The patent merges multiple signal input functions into a reduced set of input terminals. The gate driving unit is configured to receive driving signals through fewer terminals while internally distributing and controlling these signals to multiple output modules through the pull-up and pull-down control mechanisms, thereby maintaining full functionality with reduced external connections.
Solution Approach 2:
The pull-up node and pull-down node act as intermediary control points between the reduced set of input terminals and the multiple output modules. These intermediate nodes allow the circuit to expand a limited number of input signals into multiple controlled output signals without requiring a corresponding number of direct input terminals for each output.
Data Source
AI summary
A gate driving circuit includes a gate driving unit arranged in a multi-stage cascade. The gate driving unit includes a pull-up control module, a pull-up node, a first output module, a second output module, a pull-down control module, a first pull-down module, a pull-down node, a second pull-down module, and a pull-down maintenance module. The pull-up control module is configured to pull up a potential of the pull-up node under a control of a first clock signal input at a first clock signal input terminal. The pull-down control module is configured to pull up a potential of the pull-down node under a control of the first clock signal. The first pull-down module is configured to pull the potential of the pull-down node down to a potential of the first clock signal under a control of the potential of the pull-up node.