Display Power Supply Circuit with Software-Tuned Output Control
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Solution Overview
Problem
The complexity of material lists and production challenges in power supply control systems for display devices, particularly in medium and high-power TVs, due to the need for adjusting device parameters based on varying specifications, complicates production and after-sales control.
Innovation Solution
A power supply control circuit that includes a control circuit board, power factor correction circuit, resonance circuit, rectification filter circuits, communication circuit, and control system, allowing for software modification of parameters to match different output requirements, reducing the need for multiple hardware configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If device parameters of the peripheral circuit are adjusted according to different power supply specifications, then the power supply can meet various design requirements, but the material list becomes complicated and production control becomes difficult
Solution Approach 1:
The patent applies parameter changes by modifying the working parameters of the power factor correction circuit and resonance circuit through software control rather than hardware changes. The control system adjusts parameters such as switching frequency, duty cycle, and circuit operating points to accommodate different power supply specifications (75W, 82W, 130W, 200W) while using the same physical hardware components. This resolves the contradiction by achieving adaptability through parameter adjustment instead of changing the material list.
2Adaptability or versatility
If multiple peripheral circuit configurations are used for different power supply types, then design flexibility is improved, but production and after-sales control become more difficult
Solution Approach 1:
The patent implements universality by designing a single peripheral circuit configuration that can serve multiple power supply types (75W, 82W, 130W, 200W) through software-controlled parameter adjustment. The control system includes a power supply type identification module that automatically detects the required power level and configures the circuit parameters accordingly. This eliminates the need for multiple hardware configurations, thereby improving ease of manufacture and after-sales control while maintaining design flexibility.
3Reliability
If chip parameters are solidified by manufacturers, then chip reliability is improved, but the ability to adjust to different power supply requirements is reduced
Solution Approach 1:
The patent applies dynamics by introducing a dynamic parameter adjustment mechanism that allows the solidified chip parameters to be effectively modified through software control. The control system dynamically adjusts the operating parameters of the power factor correction circuit and resonance circuit based on the detected power supply type, while the chip itself maintains its fixed, reliable parameters. This separation allows the system to achieve adaptability without compromising chip reliability.
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 simplifies the material list, facilitates production, and enhances after-sales control by enabling flexible parameter adjustments within a single power supply hardware set, accommodating various specifications and requirements.
Implementation Method 1
a power factor correction circuit, a resonance circuit
Implementation Method 2
a power factor correction circuit, a resonance circuit
Implementation Method 3
a first rectification filter circuit, a second rectification filter circuit
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
Disclosed are a power supply control circuit and a display device, the power supply control circuit includes a power factor correction circuit, a resonance circuit, a first rectification filter circuit, a second rectification filter circuit, a communication circuit and a control system; an output terminal of the power factor correction circuit is connected to an input terminal of the resonance circuit; a first output terminal of the resonance circuit is connected to a power input terminal of the backlight module through the first rectification filter circuit, and a second output terminal of the resonance circuit is connected to the control circuit board and the communication circuit through the second rectification filter circuit; a third output terminal of the resonance circuit is connected to the control system and the communication circuit; the control circuit board is connected to the control system through the communication circuit; a first signal output terminal of the control system is connected to a signal input terminal of the power factor correction circuit; and a second signal output terminal of the control system is connected to a signal input of the resonance circuit.