Display Apparatus Wireless Power Proximity Control
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Solution Overview
Problem
Existing wireless power transmission technologies do not effectively protect users from electromagnetic waves, as they rely solely on the transmitting side to determine and control the distance, lacking user-centric protection mechanisms.
Innovation Solution
A display apparatus equipped with sensors and communication circuitry that acquires user proximity information and adjusts power consumption by reducing brightness, image quality, or ceasing power transmission when a user comes within a predetermined range, ensuring safe operation and minimizing electromagnetic exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transmitting side unilaterally measures distance and controls power transmission, then the system can maintain power supply functionality, but user protection effectiveness is insufficient
Solution Approach 1:
The patent implements a feedback mechanism where the receiving side (display apparatus) actively measures the distance to the user using sensors (ultrasonic, infrared, or camera-based depth sensing) and feeds back this information to the transmitting side (wireless power transmitter). The transmitter then adjusts power transmission levels based on this feedback, creating a closed-loop control system that significantly improves user protection effectiveness compared to unilateral control by the transmitter alone.
Solution Approach 2:
The patent divides the distance measurement and control functions into separate segments: the receiving side performs distance measurement using various sensors and communicates the distance information to the transmitting side via communication circuits. This segmentation allows each component to specialize in its function, improving overall system reliability for user protection while maintaining manageable complexity through clear functional separation.
2Object-affected harmful factors
If power transmission is reduced when user is close, then electromagnetic exposure is minimized, but power supply efficiency decreases
Solution Approach 1:
The patent implements dynamic power adjustment where the transmitting side continuously adapts power transmission levels based on real-time distance measurements from the receiving side. When the user is far away, full power is transmitted for efficient charging. When the user approaches within safe distance thresholds, the power level is dynamically reduced to minimize electromagnetic exposure. This dynamic adjustment optimizes the balance between power supply efficiency and user safety throughout the charging process.
Solution Approach 2:
The patent changes the power transmission parameter (power level) based on the distance parameter measured by sensors on the receiving side. By establishing threshold distances and corresponding power levels, the system automatically adjusts electromagnetic radiation intensity to appropriate levels according to user proximity, effectively controlling harmful factors while maintaining efficient power transfer when safe.
3Measurement precision
If multiple sensors are used for distance measurement, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent uses communication circuits as intermediaries between the sensors on the receiving side and the transmitting side. The sensors (ultrasonic, infrared, or camera-based) measure distance and convert it to electrical signals, which are then transmitted via communication circuits to the transmitter. This intermediary approach allows the receiving side to perform precise measurements using multiple sensor types while keeping the transmitting side's complexity manageable, as it only needs to process the communicated distance information.
4Reliability
If the receiving side actively measures distance and communicates information, then user protection is enhanced, but communication overhead increases
Solution Approach 1:
The patent implements partial action in communication by having the receiving side measure distance and communicate only when necessary (e.g., when distance thresholds are approached or changed significantly). Rather than continuously communicating all distance measurements, the system transmits power level adjustment requests only when protection conditions change, reducing communication overhead and energy consumption while maintaining effective user protection.
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
Effectively reduces electromagnetic exposure to users by dynamically adjusting power consumption based on user proximity, enhancing safety without disrupting normal operations.
Implementation Method 1
a wireless power transmission technology has been developed and used for wirelessly supplying power without physical contact between devices... As a method of wirelessly supplying power, there are a magnetic induction method, a magnetic resonance method and an electromagnetic-wave method
Data Source
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AI summary
Disclosed is a display apparatus including: a wireless power receiver configured to wirelessly receive power from an external power source to supply power to the display apparatus; a display configured to display an image based on a received image signal; communication circuitry configured to communicate with the external power source; information acquiring circuitry configured to acquire information about a distance between the display apparatus and a user; and a controller configured to determine consumption power of the display apparatus, to control the communication circuitry to provide information about the determined consumption power to the external power source, and to reduce the consumption power of the display apparatus if it is determined based on the acquired information that the user is within a predetermined critical distance of the display apparatus. Thus electromagnetic waves harmful to a human body is controlled to reduce and/or eliminate an affect a user.