Parallel Power Supply Circuit Control for Display Devices
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Solution Overview
Problem
Display devices face inefficiencies in power supply management due to fixed numbers of operating power supply circuits, which do not adapt to varying load currents, leading to reduced efficiency and potential overcurrent issues.
Innovation Solution
A power supply device with multiple power supply circuits connected in parallel, controlled by a controller that adjusts the number of operating circuits based on feedback current analysis, using state signals to determine optimal operation and include an overcurrent protector to manage load currents effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a fixed number of power supply circuits are operated, then the device structure is simple and reliable, but the power supply efficiency decreases when load current varies
Solution Approach 1:
The patent implements dynamic control of power supply circuits by adjusting the number of operating circuits based on detected load current levels. The controller dynamically switches between different numbers of power supply circuits (e.g., one, two, or three circuits) according to whether the load current exceeds first or second reference currents, making the system adaptive rather than static.
Solution Approach 2:
The patent employs a feedback mechanism where the controller detects the load current and uses this information to control the operation of power supply circuits. The detected current level feeds back to the controller, which then adjusts the number of operating power supply circuits accordingly, creating a closed-loop control system that optimizes efficiency.
2Power
If multiple power supply circuits are operated simultaneously, then the power supply capacity increases, but the risk of overcurrent increases
Solution Approach 1:
The controller continuously detects the load current and uses this feedback to determine whether to operate one, two, or three power supply circuits. By monitoring current levels and comparing them against reference currents, the system dynamically adjusts the number of operating circuits to meet power demands while preventing overcurrent conditions.
Solution Approach 2:
The patent changes the operational parameters of the power supply system by adjusting the number of active circuits based on load current thresholds. When load current exceeds the first reference current, additional circuits are activated; when it exceeds the second reference current, even more circuits are activated, thereby adapting the system's power capacity to actual demands.
3Reliability
If the number of operating power supply circuits is increased, then the power supply capacity and reliability improve, but the energy efficiency decreases under light load conditions
Solution Approach 1:
The system dynamically adjusts the number of operating power supply circuits based on detected load current levels. Under light load conditions, fewer circuits operate to maintain energy efficiency, while under heavy load conditions, more circuits are activated to ensure sufficient power capacity and reliability. This dynamic adaptation resolves the contradiction between reliability and energy efficiency.
Solution Approach 2:
The patent changes the operational state of power supply circuits by switching between different numbers of active circuits (one, two, or three) based on load current thresholds. This parameter change allows the system to optimize the balance between reliability and energy efficiency according to actual power demands.
Data Source
AI summary
A power supply device includes n power supply circuits connected in parallel and a controller to control a number of the operating power supply. The controller includes n detectors, a comparator, and an on/off controller. The n detectors are respectively connected to the n power supply circuits. The n detectors receive feedback current from the number of operating power supply circuits. The comparator compares the feedback current with predetermined first and second reference currents and outputs first, second, and third state signals. The on/off controller determines the number of the operating power supply circuits according to a cumulative number of each of the first to third state signals during a predetermined window section, and controls a on/off state of the power supply circuits according to the determined number.