Stepped Power Supply Circuit for LED Display Voltage Stability
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Solution Overview
Problem
Display apparatuses face challenges in efficiently supplying power to LED light bars with varying voltage requirements, leading to increased complexity and cost in power supply circuits, and instability in voltage delivery.
Innovation Solution
The implementation of a power supply circuit with a combination of fixed-voltage and variable-voltage power supply elements, where the fixed-voltage power supply element is superposed on the variable-voltage power supply element, and a feedback circuit that adjusts the voltage based on output variations, along with a filter circuit to reduce voltage ripple, enabling step power supply to LED light bars.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If special power supply circuits are employed to convert alternating currents into direct currents and perform voltage transform, then power supply capability is improved, but circuit complexity increases
Solution Approach 1:
The power supply circuit is divided into two independent modules: a fixed-voltage power supply module and a variable-voltage power supply module. Each module handles specific voltage requirements, avoiding the need for a single complex circuit to manage all voltage transformations. This segmentation reduces overall circuit complexity while maintaining comprehensive power supply capability.
Solution Approach 2:
The fixed-voltage power supply module serves multiple LED light bars with identical voltage requirements simultaneously. By designing a universal fixed-voltage module that can power multiple loads, the circuit avoids replicating complex transformation circuits for each LED light bar, thereby reducing overall system complexity.
2Adaptability or versatility
If voltage transform is performed to meet varying LED voltage requirements, then adaptability is improved, but circuit complexity increases
Solution Approach 1:
The power supply system is segmented into fixed-voltage and variable-voltage modules, where the variable-voltage module specifically handles LED light bars with varying voltage requirements. This segmentation allows adaptability to be achieved in a targeted manner without requiring the entire circuit to be complex.
Solution Approach 2:
The variable-voltage power supply module dynamically adjusts its output voltage based on the specific requirements of different LED light bars. This dynamic adjustment capability provides high adaptability without requiring multiple fixed transformation circuits, thereby avoiding increased circuit complexity.
3Reliability
If feedback control is implemented to stabilize output voltage, then voltage stability is improved, but control complexity increases
Solution Approach 1:
A feedback control circuit is implemented in the variable-voltage power supply module to monitor and stabilize the output voltage. The feedback mechanism detects voltage variations and automatically adjusts the power supply to maintain stability, achieving high reliability without requiring complex manual control systems.
Data Source
AI summary
A display apparatus with a power supply circuit is provided. The power supply circuit is connected with a light emitting diode (LED) drive circuit, a filter circuit and a feedback circuit in the display apparatus. The power supply circuit includes a fixed-voltage power supply element and a variable-voltage power supply element, and the fixed-voltage power supply element is superposed on the variable-voltage power supply element and configured to supply power to the LED drive circuit in a stepped manner; and a controller is configured to control a voltage of the variable-voltage power supply element according to a variation of the output voltage feedback from the feedback circuit.