Display Power Supply Bypass-Boost Switching for Input Voltage Variation
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Solution Overview
Problem
The efficiency of power conversion in display devices is affected by varying input power levels, leading to decreased performance and increased power consumption due to limitations in power supply efficiency.
Innovation Solution
A display device with a power supplier that includes a first converter to convert input voltage into boost voltage, a second converter to convert boost voltage into driving voltage, and feedback units to control the converters using PWM signals proportional to reference voltages, improving power conversion efficiency by dynamically adjusting boost voltage based on input and driving voltages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the input voltage is fixed at a single level, then the power converter design is simplified, but the power conversion efficiency deteriorates when input voltage varies
Solution Approach 1:
The patent implements dynamic voltage switching by providing multiple boost converters (first, second, third boost converters) with different input voltage ranges, and dynamically selecting which converter to operate based on the detected input voltage level. This dynamic adaptation resolves the contradiction by maintaining high conversion efficiency across varying input voltages while managing the complexity through controlled dynamic behavior.
Solution Approach 2:
The patent changes the operational parameters of the power conversion system by switching between different boost converters based on input voltage thresholds. Each boost converter is optimized for specific input voltage ranges, and the system transitions between them to maintain optimal conversion efficiency. This parameter-based selection resolves the efficiency deterioration issue while adapting to different input conditions.
2Use of energy by moving object
If a single boost voltage is used, then the converter design is simpler, but the power consumption increases due to inefficient conversion across varying input voltages
Solution Approach 1:
The patent segments the power conversion function into multiple specialized boost converters, each optimized for specific input voltage ranges. This segmentation allows each converter to operate at peak efficiency within its designated range, reducing overall power consumption. The complexity is managed by controlling which segment operates at any given time based on voltage detection and comparison.
Solution Approach 2:
The patent implements feedback control through voltage detection units that monitor input voltage levels and comparison units that determine which boost converter should operate. This feedback mechanism ensures the system automatically selects the most efficient converter configuration, minimizing power consumption while managing complexity through intelligent control logic.
3Loss of energy
If the boost voltage is not dynamically adjusted, then the control system is simpler, but the power conversion efficiency deteriorates with varying input power levels
Solution Approach 1:
The patent implements dynamic boost voltage adjustment by providing multiple boost converters that can be selectively activated based on detected input voltage levels. The system dynamically transitions between different converter configurations to maintain optimal conversion efficiency, resolving the contradiction between efficiency and automation complexity through structured dynamic behavior.
Solution Approach 2:
The patent changes the operational parameters of the power conversion system by switching between different boost converters with different input voltage optimizations. This parameter-based dynamic adjustment maintains high conversion efficiency across varying input power levels while managing automation complexity through systematic voltage threshold-based selection.
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 enhances the final efficiency of the power supplier by minimizing power consumption and ripple occurrence, improving power conversion efficiency and reducing input/output voltage differences across converters.
Implementation Method 1
a first converter configured to receive an input voltage supplied from an external system and convert the input voltage into a boost voltage
Implementation Method 2
a second converter configured to convert the boost voltage into the driving voltage
Data Source
AI summary
A power supply includes a first converter configured to convert an input voltage into a first output voltage, a first feedback circuit configured to output a first pulse width modulation (PWM) signal to the first converter to control a level of the first output voltage, and a mode controller configured to compare the input voltage and a reference voltage and determine whether the first converter operates in a first mode or a second mode based on the compared result. When the input voltage is less than or equal to the reference voltage, the first converter boosts the input voltage and outputs the boosted voltage as the first output voltage in the first mode. Further, when the input voltage is greater than the reference voltage, the first converter bypasses the input voltage and outputs the bypassed voltage as the first output voltage in the second mode.