Shift Register Structure for Narrow-Bezel Display Devices
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Solution Overview
Problem
Conventional shift registers in Gate Driver On Array (GOA) circuits occupy large space, hindering the implementation of a true narrow-bezel design in display devices due to the numerous thin-film transistors required for each shift register, which complicates the bonding and wiring processes.
Innovation Solution
A shift register with a simplified structure comprising an input module, an output pulling-up module, a reset-and-noise-reducing module, and optionally an assistant noise-reducing and pulling-down module, utilizing transistors and storage capacitors to efficiently manage signal inputs, clock signals, and voltage levels, thereby reducing noise and optimizing space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional GOA circuit uses a large amount of thin-film transistors in each shift register, then the shift register can drive gate lines reliably, but the space occupied by the GOA circuit increases significantly
Solution Approach 1:
The patent extracts and eliminates unnecessary transistors from the conventional shift register structure. Specifically, it removes redundant TFTs that were present in conventional GOA circuits, retaining only the essential ones needed for shift register functionality. This extraction reduces the component count and occupied area while maintaining the core driving capability.
Solution Approach 2:
The patent makes existing transistors perform multiple functions. For example, transistors are designed to serve both as shift register elements and as part of the gate driving function. This multi-functionality reduces the total number of components needed, thereby reducing the area occupied by the GOA circuit while maintaining reliability.
2Measurement precision
If the resolution of the display becomes higher, then the display quality improves, but the areas of the driving circuits increase
Solution Approach 1:
The patent merges the shift register function with the gate driving function into a single integrated circuit structure. By combining these functions, the patent eliminates the need for separate driving circuits that would otherwise be required, thereby reducing the total area occupied by driving circuits even as display resolution increases.
Solution Approach 2:
The patent utilizes the time dimension by implementing a shift register that processes signals sequentially rather than in parallel. This temporal processing approach allows the same physical circuit area to handle higher resolution displays by processing gate lines one after another, thereby decoupling resolution requirements from area requirements.
3Reliability
If a conventional shift register uses many thin-film transistors, then the shift register function is complete, but the bonding operation and wiring process become more complex
Solution Approach 1:
The patent extracts and removes redundant transistors from the shift register structure, leaving only the essential components needed for basic shift register functionality. This reduction in component count directly simplifies the bonding operations and wiring processes required to integrate the shift register into the display device.
Solution Approach 2:
The patent segments the shift register into minimal functional units with clear input, output, and control signals. This segmentation makes the design more modular and easier to implement, reducing the complexity of bonding operations and wiring processes by creating distinct, manageable connection points.
Data Source
AI summary
The present invention provides a shift register and a method for driving the same, a gate driving circuit and a display device, and belongs to the field of display technology. The shift register of the present invention includes an input module, an output pulling-up module and a reset-and-noise-reducing module, wherein the input module is connected to a signal input terminal, a second clock signal input terminal, a power supply voltage terminal and a pulling-up node, the output pulling-up module is connected to a first clock signal input terminal, the pulling-up node and a signal output terminal, and the reset-and-noise-reducing module is connected to the second clock signal input terminal, a reset signal input terminal, a low voltage terminal, the pulling-up node and the signal output terminal. The shift register of the present invention has a simple structure, thereby facilitating the implementation of a narrow-bezel display device.