Shift Register Circuit Temperature Compensation
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Solution Overview
Problem
The stability of shift register circuits in TFT-LCDs is compromised due to temperature-induced threshold voltage shifts in thin film transistors, leading to insufficient charging at low temperatures and abnormal signal output at high temperatures, affecting screen brightness and causing signal interference.
Innovation Solution
A shift register circuit with a voltage dividing module that adjusts voltage based on temperature, ensuring proper charging by providing different voltages to the control terminal of thin film transistors, thereby compensating for threshold voltage shifts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If thin film transistors are used in shift register circuits, then the circuit can be integrated on TFT substrate, but temperature-induced threshold voltage shifts cause insufficient charging at low temperatures and abnormal signal output at high temperatures
Solution Approach 1:
The patent changes the voltage parameter dynamically based on temperature. A voltage adjusting module is introduced that provides different voltages to the control terminal of the thin film transistor depending on temperature conditions, thereby compensating for threshold voltage shifts and maintaining stable circuit operation across temperature variations
Solution Approach 2:
The patent implements a feedback mechanism where the voltage adjusting module monitors temperature-induced threshold voltage changes and automatically adjusts the control voltage accordingly. This closed-loop control ensures that the shift register circuit maintains stable operation despite temperature variations affecting the thin film transistor characteristics
2Ease of operation
If standard voltage is applied to control terminal, then circuit operation is simple, but charging is insufficient at low temperatures leading to abnormal output
Solution Approach 1:
The patent modifies the voltage parameter applied to the control terminal based on temperature conditions. The voltage adjusting module provides higher voltage at low temperatures to ensure sufficient charging, and adjusts voltage at high temperatures to prevent abnormal signal output, thereby maintaining precise charging across the temperature range without complicating the overall circuit operation
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution stabilizes the shift register circuit operation across varying temperatures, ensuring consistent charging and reducing signal interference, thereby maintaining optimal screen performance.
Implementation Method 1
a voltage dividing module, a first terminal of the voltage dividing module being connected with the control module, a second terminal of the voltage dividing module being connected with a second voltage terminal, a resistance value of the voltage dividing module having a negative relationship with a temperature
Data Source
AI summary
A shift register circuit and a method of driving the same, a gate driver circuit, an array substrate and a display device. The shift register circuit includes an input subcircuit and a signal output subcircuit. The input subcircuit includes: a control module, which is configured to output a signal of the first voltage terminal to a voltage dividing node under a control of an input signal; an input module configured to output a signal of the voltage dividing node to the signal output subcircuit under a control of the control module; and a voltage dividing module, a resistance value of the voltage dividing module having a negative relationship with a temperature, and the signal output subcircuit is connected with an output terminal of the input module and configured to output a gate scan signal from an output signal terminal under a control of the input module.