Magnetic Power Adapter Layout for Thin Large-Screen Displays
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Solution Overview
Problem
As display apparatuses increase in size, the power requirements for their light source elements also increase, leading to a larger power circuit volume that impedes the reduction in thickness, making it challenging to maintain both performance and compactness.
Innovation Solution
A display apparatus with a detachable adapter that supplies power through magnetic interaction for high-voltage power and electrical connections for low-voltage power, allowing the power circuit components to be distributed between the adapter and the display apparatus, reducing the thickness by eliminating the need for external power circuit components in the display body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the number of light source elements is increased to improve display size and performance, then the power consumption increases, but the volume of power circuit components increases which impedes thickness reduction
Solution Approach 1:
The power circuit is divided into two separate parts: a power adapter containing high-voltage power circuit components (transformer, rectifier, capacitor) and a display apparatus containing only low-voltage power reception components. This segmentation allows the bulky high-voltage power conversion components to be located in the detachable adapter rather than in the display apparatus body, thereby reducing the thickness of the display apparatus while still supporting high power consumption requirements.
Solution Approach 2:
The high-voltage power circuit components (transformer, rectifier bridge, filter capacitor) are extracted from the display apparatus and placed in the power adapter. Only the low-voltage power reception circuitry remains in the display apparatus, significantly reducing its thickness. The adapter handles all high-voltage power conversion externally, and transmits only converted low-voltage power to the display apparatus via a connector.
2Reliability
If power circuit components are integrated in the display apparatus to ensure stable power supply, then the reliability improves, but the device complexity and volume increase
Solution Approach 1:
The power supply system is segmented into high-voltage power conversion functions (in the adapter) and low-voltage power distribution functions (in the display apparatus). The adapter contains the complex high-voltage transformer, rectifier bridge, and filter capacitor necessary for reliable power conversion, while the display apparatus contains only simple low-voltage power reception and distribution circuits. This segmentation maintains power supply reliability through proper high-voltage conversion while reducing device complexity in the display apparatus.
Solution Approach 2:
The power adapter acts as an intermediary device that performs all complex high-voltage power conversion operations externally. It converts AC power to DC power through transformation, rectification, and filtering, then transmits the stabilized low-voltage DC power to the display apparatus via a connector. This intermediary approach ensures reliable power supply while keeping the display apparatus simple and thin.
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 enables the reduction of the display apparatus's thickness while ensuring efficient power transmission and safety, preventing power loss and electrical hazards by eliminating exposed contacts and using magnetic interaction for high-voltage power transfer.
Implementation Method 1
receive high-voltage power from an adapter through a magnetic interaction between the adapter and the display apparatus
Implementation Method 2
a primary coil wound around the first magnetic core; a second magnetic core disposed in the body; and a secondary coil wound around the second magnetic core, and the primary coil and the first magnetic core may be magnetically associated with the secondary coil and the second magnetic core without being in contact with the second magnetic core
Data Source
AI summary
A display apparatus includes a body; a display provided in the body; a processor provided in the body and configured to control the display to display an image; and a power supply including an adapter configured to be detachable from the body, and a power assembly configured to receive power from the adapter in a non-contact manner and supply the power to at least one of the display and the processor.