Display Panel Drive Circuit Quiescent Current Control
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Solution Overview
Problem
The challenge is to reduce power consumption in display panels while maintaining display quality, especially as panel size and resolution increase, as existing technologies struggle to ensure display quality when minimizing power consumption.
Innovation Solution
A drive circuit with an electrical module and sub-module that detects voltage differences, reducing the initial quiescent current when input and output voltages are equal, and maintaining or increasing it for a preset time when there are voltage differences, to optimize power usage and charging efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If the quiescent current is reduced to lower power consumption, then power consumption is reduced, but the display quality cannot be ensured
Solution Approach 1:
The patent applies dynamics by making the quiescent current adjustable rather than fixed. The drive circuit dynamically changes the quiescent current based on voltage detection: when input voltage equals output voltage, the quiescent current is reduced to save power; when there is a voltage difference, the quiescent current is maintained or increased for a preset time to ensure proper charging and display quality. This dynamic adjustment resolves the contradiction between power consumption and display quality.
Solution Approach 2:
The patent changes the parameter of quiescent current based on voltage conditions. By detecting whether input voltage equals output voltage, the system adjusts the quiescent current parameter accordingly - reducing it when voltages are equal to lower power consumption, and maintaining or increasing it when voltages differ to ensure display quality. This parameter change strategy directly addresses the technical contradiction.
2Use of energy by stationary object
If the quiescent current is reduced for power savings, then power consumption decreases, but the charging efficiency and voltage response become insufficient
Solution Approach 1:
The patent uses dynamic current adjustment to resolve the contradiction between power savings and charging efficiency. The quiescent current is reduced only when voltage stability is confirmed (input voltage equals output voltage), and is maintained or increased when voltage differences exist, ensuring adequate charging efficiency during voltage transitions while achieving power savings during stable operation.
Solution Approach 2:
The patent implements feedback by detecting the relationship between input and output voltages and using this information to control the quiescent current. The detection unit monitors voltage equality, and based on this feedback, the control unit adjusts the quiescent current accordingly - reducing it when voltages match and maintaining or increasing it when they differ, thus ensuring both power efficiency and charging performance.
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 approach reduces power consumption while ensuring the display panel is fully charged, thereby maintaining display quality and improving charging efficiency, even during voltage changes.
Implementation Method 1
When the electrical sub-module detects that an input voltage and an output voltage of the electrical module are equal
Data Source
AI summary
The present disclosure provides a drive circuit that comprises: an electrical module and an electrical sub-module connected to the electrical module. When the electrical sub-module detects that an input voltage and an output voltage of the electrical module are equal, an initial quiescent current of the electrical module is reduced, when there is a difference between the input voltage and the output voltage of the electrical module, the initial quiescent current of the electrical module is reduced after maintaining or increasing the initial quiescent current of the electrical module for a preset time period.