Drive Circuit Discharging Module for LC Oscillation Control
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Solution Overview
Problem
The asynchronous step-down circuit in display device drive circuits operates intermittently in light-loading conditions, leading to LC oscillation and signal instability, affecting the display effect.
Innovation Solution
A drive circuit with a discharging circuit module that includes transistors, inductors, diodes, and capacitors, which provides a discharging path for the capacitor, maintaining a fixed operation frequency and amplitude, thereby enhancing signal stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If an asynchronous step-down circuit is used to generate 3.3V voltage, then the circuit can operate in intermittent mode in light-loading conditions, but this causes LC oscillation and signal instability
Solution Approach 1:
The patent introduces a discharging circuit module as an intermediary component to provide a dedicated discharge path for the capacitor in the asynchronous step-down circuit. This mediator prevents the capacitor from discharging through the inductor, thereby eliminating LC oscillation while maintaining light-loading operation capability. The discharging circuit module acts as a controlled pathway that redirects the discharge current away from the oscillation-prone LC path.
2Loss of energy
If the asynchronous step-down circuit operates intermittently in light-loading mode, then energy consumption is reduced, but signal stability deteriorates due to LC oscillation
Solution Approach 1:
The discharging circuit module serves as a mediator that provides a controlled discharge path for the capacitor during light-loading conditions. By introducing this intermediary component, the circuit can operate intermittently with reduced energy consumption while preventing the capacitor from discharging through the inductor, thereby eliminating LC oscillation and maintaining signal stability.
3Reliability
If a discharging circuit is added to the asynchronous step-down circuit, then signal stability is improved, but device complexity increases
Solution Approach 1:
The discharging circuit module is designed as a compact intermediary structure that can be integrated into the existing asynchronous step-down circuit. By using a dedicated discharge path with controlled components, the circuit achieves signal stability improvement while minimizing the increase in device complexity through efficient space utilization and component integration.
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 discharging circuit module stabilizes the signal in light-loading modes, preventing LC oscillation and ensuring consistent operation, thus improving the display device's performance.
Implementation Method 1
an inductor, which comprises a first end electrically connected to the first node, a second end of the inductor being electrically connected to a second voltage terminal
Implementation Method 2
a first capacitor, which comprises a first end electrically connected to the second voltage terminal, a second end of the first capacitor being electrically connected to the grounding terminal
Data Source
AI summary
The disclosure discloses a drive circuit included a first transistor electrically connected to a first control terminal, a first voltage terminal, and a first node; an inductor electrically connected to the first node and a second voltage terminal; a first diode electrically connected to a grounding terminal and the first node; a first capacitor electrically connected to a second voltage terminal and the grounding terminal; and a discharging circuit module electrically connected to the first node and the grounding terminal to provide a discharging circuit to discharge the capacitor.