GIP Shift Register Node Controller Integration
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Solution Overview
Problem
The increasing complexity of gate-in-panel (GIP) circuits in display devices leads to an increase in the size of drive circuits due to the need for additional circuits to generate driving signals, complicating the connection and redesign of drive circuits.
Innovation Solution
A display device with a shift register comprising a plurality of stages connected as a cascade, including a node controller that generates a first reset signal internally during the vertical blanking interval, reducing the need for external drive circuits and allowing for a more compact design by integrating the first reset signal generation within the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If GIP circuits are made more complex to handle increasing driving signals, then the functionality of the gate driver is improved, but the size of drive circuits increases
Solution Approach 1:
The patent merges the first reset signal generator into the GIP circuit section itself, combining previously separate functions (reset signal generation and shift register operation) into a single integrated circuit. This integration maintains the necessary functionality while reducing the overall drive circuit size by eliminating external reset signal generation components.
Solution Approach 2:
The GIP circuit section is designed to perform multiple functions: it generates gate pulses through the shift register, controls the timing of these pulses, and internally generates the first reset signal during the vertical blanking interval. This multi-functionality reduces the need for separate dedicated circuits for each function, thereby reducing overall drive circuit size.
2Adaptability or versatility
If additional circuits are added to generate driving signals for complex GIP circuits, then the driving capability is improved, but the connection and redesign of drive circuits becomes more complicated
Solution Approach 1:
By merging the first reset signal generator into the GIP circuit section, the patent reduces the number of separate circuits that need to be connected and coordinated. This integration simplifies the overall connection architecture and reduces redesign complexity when adapting to different display configurations.
Solution Approach 2:
The GIP circuit section serves itself by internally generating the first reset signal during the vertical blanking interval without requiring external intervention. This self-service capability reduces the number of external connections needed and simplifies the drive circuit architecture.
Data Source
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AI summary
A display device comprises a pixel array, a shift register, and a node controller. In the pixel array, data lines and gate lines are defined, and pixels are arranged in a matrix. The shift register comprises a plurality of stages connected as a cascade, and sequentially supplies gate pulses to the gate lines. The node controller controls the nodes in the shift register. The shift register's ith stage comprises a pull-up transistor, a pull-down transistor, a start controller, and a QB node discharge controller. The node controller's first reset signal generator consists of a gate electrode connected to a gate-low voltage input line, a drain electrode connected to a high-potential voltage input line, and a source electrode connected to a first reset signal input line. The first reset signal generator charges the first reset signal input line in response to a turn-on voltage applied to the gate-low voltage input line, during the vertical blanking interval of each frame.