Display Adapter Power Factor Correction Circuit
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display apparatus power circuits are complex and limited in size reduction and weight reduction due to the dual structure of power factor correctors (PFC) and insulated DC/DC converters, which complicates the design and hinders efficient power supply for display devices.
Innovation Solution
A display apparatus with a miniaturized and lightweight adapter that includes a high-frequency transformer for boosting alternating current (AC) voltage, a switch for controlling current flow, and a controller for power factor correction, allowing for modular and efficient power supply with electrical insulation between input and output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dual structure of uninsulated PFC and insulated DC/DC converter is used, then power factor and higher harmonics regulations are satisfied, but device complexity increases and size reduction is limited
Solution Approach 1:
The patent combines the PFC function and DC/DC conversion function into a single integrated circuit structure. The insulated DC/DC converter is designed to perform both power factor correction and voltage conversion simultaneously, eliminating the need for separate PFC and DC/DC converter stages. This merging reduces device complexity while maintaining power factor correction capability and electrical insulation between input and output.
2Reliability
If a dual structure of uninsulated PFC and insulated DC/DC converter is used, then power factor and higher harmonics regulations are satisfied, but size reduction and weight lightening are limited
Solution Approach 1:
The patent merges the PFC and DC/DC converter into a single integrated unit, which directly reduces the number of components and overall adapter weight. The unified structure eliminates redundant elements such as separate magnetic components and isolation barriers, achieving weight reduction while maintaining power factor correction functionality.
3Reliability
If a dual structure of uninsulated PFC and insulated DC/DC converter is used, then power factor and higher harmonics regulations are satisfied, but size reduction is limited
Solution Approach 1:
The patent integrates the PFC and DC/DC converter functions into a single compact circuit module. This consolidation reduces the overall volume by eliminating the need for separate PFC stage components and insulation structures, while maintaining the power factor correction capability and electrical isolation requirements.
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
The solution enables a stable and efficient power supply with a simplified power circuit structure, allowing for easy extension to meet varying load requirements and maintaining a constant output voltage across different input AC power levels, thus enhancing usability in various regions.
Implementation Method 1
a transformer configured to boost an input first alternating current (AC) voltage
Data Source
AI summary
Disclosed are a display apparatus and an electronic apparatus, the display apparatus including: a main body including a display and a connector; and an adapter connectable to the main body and configured to supply power to the connected main body, the adapter including: a transformer configured to boost an input first alternating current (AC) voltage, a switch including a switching device configured to switch a current flowing in the transformer, a controller configured to control the switching device to output a second AC voltage boosted by the transformer, and the main body including a power factor correction (PFC) converter configured to correct a power factor of the second AC voltage output from the adapter and output a direct current (DC) voltage.