Bootstrap Gate Driving Circuit for Low-Temperature Charge Release
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Solution Overview
Problem
Display devices in low-temperature environments face issues with residual electric charge leading to horizontal stripes due to inadequate charge release, which existing methods attempt to address by increasing capacitance but at the cost of affecting power on timing sequences and causing abnormal displays.
Innovation Solution
An electrical level processing circuit comprising an electrical level conversion circuit, a control circuit, and a bootstrap circuit that generates detecting control signals based on ambient temperature and voltage to amplify the driving electrical level signal, ensuring faster charge release without disrupting power on timing sequences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If capacitance is increased to improve charge release in low-temperature environments, then charge release effectiveness is improved, but power on timing sequences are affected and abnormal displays occur
Solution Approach 1:
The patent implements dynamic adjustment of the bootstrap circuit based on temperature detection. The circuit switches between different operating modes (first bootstrap mode at low temperatures, second bootstrap mode at normal temperatures) to optimize charge release effectiveness without causing abnormal displays during power on. This dynamic adaptation resolves the contradiction by making the system flexible rather than static.
Solution Approach 2:
The patent changes the electrical parameters (voltage levels, capacitance values) of the bootstrap circuit based on detected temperature conditions. At low temperatures, the circuit uses enhanced parameters to ensure complete charge release, while at normal temperatures, it uses standard parameters to avoid timing sequence disruptions. This parameter adaptation allows the system to achieve reliable charge release only when necessary.
2Speed
If bootstrap circuit is activated to amplify driving electrical level signal for faster charge release, then charge release speed is improved, but power consumption increases
Solution Approach 1:
The bootstrap circuit is activated periodically or conditionally based on temperature detection rather than continuously. The detecting circuit monitors temperature and only enables the bootstrap amplification function when low temperature conditions are detected, which is when fast charge release is actually needed. This periodic/conditional activation reduces overall power consumption while maintaining fast charge release capability when required.
Solution Approach 2:
The system uses its own detecting circuit to monitor environmental conditions and automatically activate the bootstrap circuit only when necessary. The circuit serves itself by making intelligent decisions about when to consume additional power for signal amplification, based on actual operational needs rather than continuous operation.
3Measurement precision
If detecting circuit monitors temperature and voltage to control bootstrap circuit, then charge release accuracy is improved, but device complexity increases
Solution Approach 1:
The detecting circuit performs multiple functions: it detects both temperature and voltage conditions, controls the bootstrap circuit activation, and determines the appropriate bootstrap mode. By consolidating these detection and control functions into a single multi-functional circuit, the patent achieves accurate charge release control without proportionally increasing overall device complexity.
Solution Approach 2:
The patent combines the temperature detection, voltage detection, and bootstrap control functions into an integrated control mechanism. The detecting circuit and bootstrap circuit work as a unified system where the detection results directly control the bootstrap operation, reducing the need for separate independent control circuits and minimizing overall complexity.
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
The solution effectively prevents horizontal stripes by ensuring complete charge release in display devices during turn-off in low-temperature environments without affecting power on timing sequences, thereby maintaining normal display functionality.
Implementation Method 1
a bootstrap circuit, connected to the second node, the third node and an output terminal, and configured to amplify the driving electrical level signal and output the driving electrical level signal that has been amplified to the output terminal
Data Source
AI summary
An electrical level processing circuit, a gate driving circuit and a display device. The electrical level processing circuit includes: an electrical level conversion circuit, a control circuit, a switching circuit and a bootstrap circuit. The electrical level conversion circuit is configured to convert a received signal into a driving electrical level signal and provide it to a first node; the control circuit includes a detecting circuit, and the control circuit is configured to output a detecting control signal to a second node according to a signal detected by the detecting circuit; the switching circuit is configured to electrically conduct the first node and a third node in response to a first detecting control signal; and the bootstrap circuit is configured to amplify the driving electrical level signal and output it to an output terminal in response to the first detecting control signal.