Wireless Power Transmitter Dynamic Debounce for Indicator Flicker
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless charging systems face challenges in efficiently managing power allocation among multiple devices and maintaining stable charging status indicators, particularly in scenarios where devices are moved or lose contact temporarily, leading to potential power transmission interruptions and undesired indicator flickering.
Innovation Solution
The system employs a wireless power transmitting device that uses coils to transmit power based on utilization factor information and order of device placement, with control circuitry monitoring impedance changes and in-band communications to adjust power transmission and debounce periods, ensuring efficient power allocation and stable charging status indicators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the wireless power transmitting device transmits power to multiple devices simultaneously, then the power allocation efficiency is improved, but the charging status indicator may flicker when devices are moved or lose contact temporarily
Solution Approach 1:
The system dynamically adjusts the debounce period based on the detected cause of power loss. When device movement is detected, a shorter debounce period is applied to quickly reflect the actual charging status. When temporary contact loss is detected, a longer debounce period is applied to prevent false flickering, thereby maintaining indicator stability while supporting multi-device power transmission
Solution Approach 2:
The system changes the debounce period parameter dynamically based on the situation. By adjusting this time parameter, the system can differentiate between genuine charging interruptions and temporary contact losses, preventing unwanted indicator flickering while maintaining accurate status representation during multi-device operation
2Reliability
If the debounce period is extended to prevent indicator flickering, then the charging status indicator stability is improved, but the responsiveness to actual device removal is reduced
Solution Approach 1:
The system dynamically adjusts the debounce period based on the detected cause of power loss. When device movement is detected, a shorter debounce period is applied to quickly reflect the actual charging status. When temporary contact loss is detected, a longer debounce period is applied to prevent false flickering, thereby maintaining indicator stability while supporting multi-device power transmission
Solution Approach 2:
The system changes the debounce period parameter dynamically based on the situation. By adjusting this time parameter, the system can differentiate between genuine charging interruptions and temporary contact losses, preventing unwanted indicator flickering while maintaining accurate status representation during multi-device operation
3Measurement precision
If the system monitors impedance changes to detect device movement, then the device movement detection accuracy is improved, but the power transmission interruptions increase
Solution Approach 1:
The system continuously monitors impedance changes and uses this feedback to detect device movement. By comparing impedance readings over time, the system can identify when a device has been moved and adjust the debounce period accordingly, minimizing unnecessary power transmission interruptions while maintaining accurate movement detection
Solution Approach 2:
The system replaces mechanical contact detection with electrical impedance measurement. This allows for more precise and non-intrusive detection of device movement and contact status, enabling the system to distinguish between genuine removals and temporary losses without causing significant power transmission interruptions
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 approach enables efficient power allocation among multiple devices, minimizes interruptions during device movement, and prevents unwanted charging status indicator flickering by dynamically adjusting debounce periods based on the cause of power loss.
Implementation Method 1
The coil receives alternating-current wireless power signals from a coil in the wireless charging mat that is overlapped by the coil in the portable electronic device
Implementation Method 2
The rectifier circuitry converts the received signals into direct-current power
Data Source
AI summary
A wireless power system may have a wireless power transmitting device and wireless power receiving devices. The wireless power transmitting device has wireless power transmitting circuitry with coils to transmit wireless power to wireless power receiving devices. The wireless power receiving devices are placed on the wireless power transmitting device in an order. Batteries in the wireless power receiving devices are charged based at least partly on the order. Power allocation is based on utilization factor information such as information on a power draw associated with each of the power receiving devices. Measurement circuitry in the wireless power transmitting device is used to gather impedance images from the coils. Changes in the impedance images are used to temporarily halt power transmission. Power transmission is resumed depending on whether in-band communications are lost or are maintained.