Shift Register Power Supply Segmentation for Amorphous Silicon GOA Panels
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Solution Overview
Problem
Amorphous silicon thin film transistors used in Gate Driver On Array (GOA) for TFT-LCDs experience significant waveform distortion and higher power consumption compared to monocrystalline silicon Metal-Oxide-Semiconductor Transistors, leading to inefficient driving performance.
Innovation Solution
A shift register design for GOA TFT-LCD panels incorporating a protection circuit, retaining circuit, driving circuits, resetting circuit, and multiple timing control signals to optimize signal output and reduce power consumption, including specific connections and power supply terminals to manage and control the output circuit effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If amorphous silicon thin film transistors are used in GOA driving unit, then the device complexity is reduced and ease of manufacture is improved, but the power consumption increases and waveform distortion occurs
Solution Approach 1:
The GOA driving unit is divided into multiple shift registers, each independently controlled by separate power supply terminals. This segmentation allows selective powering of different circuit sections, reducing overall power consumption while maintaining ease of manufacture with amorphous silicon TFTs
Solution Approach 2:
Multiple power supply terminals with different voltage levels are introduced to control different circuit components. By adjusting power supply parameters (voltage levels at different terminals), the circuit achieves proper driving waveforms while reducing power consumption compared to single power supply designs
2Ease of manufacture
If amorphous silicon thin film transistors are used in GOA driving unit, then the device complexity is reduced and ease of manufacture is improved, but the output waveform distortion increases
Solution Approach 1:
Different power supply voltage levels are applied to different circuit stages through multiple power supply terminals. This parameter adjustment compensates for the inferior switching characteristics of amorphous silicon TFTs, producing undistorted output waveforms while maintaining manufacturing simplicity
Solution Approach 2:
The protecting circuit acts as an intermediary between the driving circuit and output, using controlled power supply connections to ensure proper waveform output. The retaining circuit similarly mediates signal levels, compensating for waveform distortion caused by amorphous silicon TFT limitations
3Use of energy by moving object
If multiple power supply terminals are used, then the power consumption is reduced and driving performance is improved, but the device complexity increases
Solution Approach 1:
The power supply system is segmented into multiple terminals, each independently controlling specific circuit sections. This segmentation reduces power consumption by enabling selective powering while the modular structure keeps the increased complexity manageable through systematic organization
4Use of energy by moving object
If multiple timing control signals are used, then the power consumption is reduced and interference is minimized, but the device complexity increases
Solution Approach 1:
Multiple timing control signals are used to independently control different shift register stages and power supply connections. This segmentation enables precise timing control that reduces power consumption and interference, while the systematic signal distribution manages the inherent complexity
Data Source
AI summary
The embodiment of the present invention discloses a shift register for reducing the power consumption during driving. The shift register includes a protection circuit, a retaining circuit, an output circuit, a first driving circuit, a second driving circuit, a resetting circuit, a timing control terminal, a first power supply terminal, a second power supply terminal, a third power supply terminal and a fourth power supply terminal. The embodiment of the present invention further discloses a Gate driver On Array (GOA) panel and a method for gate driving.