Parallel Regulator Power Supply Circuit for LCD Load Stability
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Solution Overview
Problem
Existing power supply circuits for liquid crystal display devices face challenges in maintaining voltage stability and efficiency when load current increases, and they require a wide input voltage range and adjustable power consumption levels, especially in low power consumption modes.
Innovation Solution
A semiconductor device with a first regulator to stabilize input voltage, a voltage boosting circuit to generate a boosted voltage, and additional regulators in parallel to stabilize and adjust the output voltage, along with differential amplifier circuits and capability selection circuits to manage load changes and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single regulator is used to smooth the output voltage of the first voltage boosting circuit, then the circuit structure is simple, but the capability to drive load decreases when load current increases
Solution Approach 1:
The single regulator is segmented into multiple parallel regulators (first regulator and second regulator). Each regulator handles a portion of the load current, distributing the driving burden and preventing significant voltage drops when load current increases, thereby improving the overall capability to drive load while maintaining reasonable circuit complexity.
Solution Approach 2:
The system changes the operational parameters of the regulators by enabling multiple regulators to operate in parallel. This parameter change (from single to multiple regulators) increases the total current handling capacity and improves the capability to drive load without excessively complicating the circuit structure.
2Reliability
If the output voltage of the first voltage boosting circuit decreases due to increased load current, then the input to the second voltage boosting circuit is reduced, but this causes the output voltage of the second voltage boosting circuit to significantly decrease, affecting driving capability
Solution Approach 1:
The first regulator and second regulator perform preliminary voltage smoothing actions on the output of the first voltage boosting circuit before it enters the second voltage boosting circuit. This preliminary stabilization prevents excessive voltage drops from propagating through the second boosting stage, ensuring that the final output voltage remains stable and the driving capability is maintained even when load current increases.
Solution Approach 2:
The parallel regulator configuration inherently provides feedback mechanisms where each regulator monitors and adjusts its output to maintain stable voltage levels. When load current increases, the regulators respond by adjusting their internal parameters to compensate for voltage drops, preventing significant decreases in the output voltage of the second voltage boosting circuit and maintaining driving capability.
3Adaptability or versatility
If a wide input voltage range and adjustable power consumption are required, then the circuit becomes more complex, but portability and efficiency are improved
Solution Approach 1:
The system incorporates dynamic control capabilities that allow the regulators to adjust their operating parameters based on input voltage levels and power consumption requirements. This dynamic adaptability enables the circuit to handle a wide input voltage range and adjust power consumption levels without requiring a completely different circuit architecture for each condition, thus achieving versatility without excessive 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
This configuration reduces the influence of increased load current on voltage boosting, improves load driving capability, expands the input voltage range, increases voltage conversion efficiency, and allows for adjustable power consumption, enhancing the performance of power supply circuits and liquid crystal display devices.
Implementation Method 1
a voltage boosting circuit that boosts the stabilized voltage to generate a boosted voltage
Implementation Method 2
a first regulator that stabilizes an input voltage to generate a stabilized voltage; a second regulator that stabilizes the boosted voltage to generate a first power supply voltage; and a third regulator that is connected to the second regulator in parallel, and that stabilizes the boosted voltage to generate a second power supply voltage
Data Source
AI summary
This semiconductor device includes a first regulator that stabilizes an input voltage to generate a stabilized voltage; a voltage boosting circuit that boosts the stabilized voltage to generate a boosted voltage; a second regulator that stabilizes the boosted voltage to generate a first power supply voltage; and a third regulator that is connected to the second regulator in parallel, and that stabilizes the boosted voltage to generate a second power supply voltage.