Wireless Charging Backoff Circuit for Energy Conservation
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Solution Overview
Problem
Conventional wireless charging systems consume excessive energy by maintaining an active electromagnetic induction field even when not actively charging, leading to unnecessary battery consumption.
Innovation Solution
A backoff feature that turns the transmitting mode and magnetic induction field on and off based on a predetermined algorithm or user selection, implemented in a backoff chip/circuit, to conserve energy when the transmitting wireless device is not charging another device, along with position detectors to activate the transmitting mode only when the device is upside down and on a horizontal surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the transmitting wireless device maintains an active electromagnetic induction field continuously, then the device is ready to charge immediately when a receiving device is placed, but excessive energy is consumed during idle periods
Solution Approach 1:
The transmitting wireless device alternates between active and inactive states using periodic backoff intervals. The device activates the electromagnetic induction field only during scheduled time windows and remains inactive during backoff periods, reducing energy consumption while maintaining periodic readiness to charge receiving devices.
2Loss of time
If the transmitting mode is activated continuously, then charging can begin immediately when a receiving device is placed, but energy is wasted when no device is present to charge
Solution Approach 1:
The transmitting device performs preliminary actions by activating the electromagnetic induction field only when a receiving device is detected or during scheduled time windows. Position detectors and presence detection mechanisms trigger the transmitting mode in advance of actual charging needs, eliminating delays while avoiding continuous activation.
3Use of energy by moving object
If position detectors are used to activate transmitting mode only when the device is upside down on a horizontal surface, then energy consumption is reduced, but the charging feature can be activated inadvertently
Solution Approach 1:
The system uses feedback from position detectors to monitor device orientation and surface contact. When the device is detected to be upside down on a horizontal surface, the transmitting mode is activated. The system continuously monitors position feedback to maintain or deactivate the transmitting mode, ensuring activation only under correct conditions while minimizing energy consumption.
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 reduces energy consumption by activating the charging feature only when necessary, conserving battery power and avoiding unnecessary energy expenditure during idle periods.
Implementation Method 1
Conventional wireless charging systems introduce electromagnetic fields (e.g., induced electromagnetic fields) to transfer energy once a receiving wireless device comes in close proximity to a transmitting wireless device
Implementation Method 2
The induction coil is adjacent the rear side of the wireless device and configured to generate a magnetic field when the transmitting mode of the wireless charging circuit is activated
Data Source
AI summary
A wireless charging circuit for using a transmitting wireless device to charge a receiving wireless device is disclosed. The wireless charging circuit of the transmitting wireless device has a transmitting mode. The transmitting wireless device includes a wireless charging circuit and a position detector, the position detector electronically coupled to the wireless charging circuit and for activating the transmitting mode of the wireless charging circuit of the transmitting wireless device dependent upon the position of the transmitting wireless device (e.g., upside down). When a receiving wireless device is placed face up on an upside down transmitting wireless device that is in the transmitting mode with the transmitting mode activated, the transmitting wireless device automatically begins charging the battery of the receiving wireless device. A method of wireless charging of a wireless device and including a battery power conserving backoff feature is also disclosed.