Multi-Stage Shift Register for All-Drive and Scan Pulse Output
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Solution Overview
Problem
Conventional shift registers are unable to simultaneously drive gate lines in liquid crystal display devices, which is necessary in certain scenarios.
Innovation Solution
A shift register design that includes multiple stages capable of simultaneously supplying all-drive signals to gate lines for an all-drive period and sequentially supplying scan pulses for a scan period, utilizing a configuration of scan pulse, carry pulse, and all-drive signal output units controlled by switching devices and node controllers to manage voltage states and signal timing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional shift register is used to drive gate lines, then sequential driving is achieved, but simultaneous driving capability is lost
Solution Approach 1:
The shift register is divided into multiple independent stages, each capable of operating autonomously. Each stage includes its own output unit and node controller, allowing individual stages to be activated for simultaneous gate line driving while others perform sequential scanning, thus achieving multi-mode operation without requiring a completely different architecture
Solution Approach 2:
Each stage in the shift register is designed with dual functionality: it can operate as a sequential scan stage or as a simultaneous drive stage. The output units and node controllers are configured to respond to different control signals, enabling the same hardware structure to perform both sequential and simultaneous driving operations based on external control
2Ease of manufacture
If the shift register structure is simplified for sequential driving, then manufacturing ease is improved, but simultaneous driving capability is reduced
Solution Approach 1:
The shift register incorporates dynamic control mechanisms where node controllers adjust voltage states based on real-time control signals. This dynamic behavior allows the same static hardware structure to exhibit different operational characteristics (sequential or simultaneous driving) depending on the control input, adding functionality without increasing physical complexity
Solution Approach 2:
The invention utilizes changes in voltage parameters and control signal states to switch between operating modes. By varying the voltage levels at set nodes and reset nodes through controlled signal inputs, the shift register can transition between sequential and simultaneous driving modes without requiring structural modifications, maintaining manufacturing simplicity while enhancing adaptability
Data Source
AI summary
A shift register which is capable of simultaneously driving gate lines is disclosed. The shift register includes a plurality of stages for simultaneously supplying all-drive signals to gate lines for an all-drive period and sequentially supplying scan pulses to the gate lines for a scan period.