Display Apparatus Wireless Power Converter Distance Adaptation
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Solution Overview
Problem
Wireless power transfer to display apparatus such as TVs is challenging due to distance variations, leading to unstable power transmission, especially for wall-mounted TVs with varying installation configurations, as existing methods struggle to maintain consistent power delivery regardless of distance from the peripheral apparatus.
Innovation Solution
A display apparatus with a resonance circuit unit, rectifier, and converter that adjusts frequency and duty based on distance to maintain target power, using a topology transformable DC-DC converter and processor to measure distance and adjust the inverter's operating frequency and duty, ensuring stable power transmission across a wide range of distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless power transfer is used to eliminate wiring complexity, then ease of operation and interior design flexibility are improved, but power transmission stability deteriorates due to distance variations
Solution Approach 1:
The patent applies dynamics by making the operating frequency and duty cycle of the converter dynamic and adjustable based on detected distance. The system continuously adapts its operating parameters rather than using fixed settings, allowing it to maintain stable power transmission across varying distances. This is achieved through a controller that adjusts the converter's frequency and duty cycle in response to distance changes, transforming a static system into a dynamic one that can compensate for environmental variations.
Solution Approach 2:
The patent implements parameter changes by modifying the operating frequency and duty cycle of the power converter based on detected distance from the external apparatus. When distance increases, the system changes these parameters to optimize power transfer efficiency. This allows the system to maintain reliable power transmission despite variations in installation configuration, directly addressing the reliability issue while preserving the wireless convenience.
2Device complexity
If the converter operates at fixed frequency and duty, then device complexity is reduced, but power reception stability deteriorates with distance variation
Solution Approach 1:
The patent implements feedback by using a sensor to detect the distance between the display apparatus and the external power source, then using this information to adjust the converter's operating frequency and duty cycle. This closed-loop control system continuously monitors the installation conditions and automatically optimizes power transfer parameters, ensuring stable power reception without requiring complex manual configuration or oversimplified fixed-parameter control.
3Reliability
If the converter adjusts frequency and duty based on distance, then power transmission stability is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by integrating multiple functions into the controller: it performs distance detection, processes sensor signals, determines optimal operating parameters, and controls the converter's frequency and duty cycle all in one component. This multi-functional approach achieves stable power transmission across varying distances without proportionally increasing overall system complexity, as the controller handles multiple tasks that would otherwise require separate dedicated components.
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 stable and efficient wireless power transmission to display apparatus regardless of distance, maintaining target power levels by dynamically adjusting the converter's operation, thus eliminating the need for complex wiring and enhancing interior design flexibility.
Implementation Method 1
a resonance circuit unit configured to receive power by using an inductive electromotive force through magnetic field generated by an external apparatus
Data Source
AI summary
The present invention relates to an electronic apparatus and display apparatus, and method for driving the apparatuses, and the display apparatus according to an embodiment of the present invention may comprise: a resonance circuit unit for generating voltage by means of inductive electromotive force generated due to an external apparatus; a rectification unit for rectifying the output voltage of the resonance circuit unit; and a converter for outputting the rectified voltage of the rectification unit as the target voltage by varying duty on the basis of duty data and target voltage determined in accordance with the distance from the external apparatus.