Shared Polar Plate Switching for Wireless Charging Safety

Solution Overview

Problem

The stacking of wireless charging capacitor polar plates and capacitance detection polar plates in electronic devices poses safety hazards due to high working voltages during wireless charging, leading to poor safety outcomes.

Innovation Solution

A circuit control apparatus comprising a charging control module, a circuit switching module, a capacitance detection module, a first switch, and a first polar plate, where the first switch includes a first common end, a second end, and a third end, with the first polar plate electrically connected to the first common end, the charging control module connected to the second end, and the capacitance detection module connected to the third end. The circuit switching module controls the first switch's connection status, allowing the charging control module to perform charging through the first polar plate or the capacitance detection module to detect capacitance values, thereby avoiding device stacking and ensuring safety even at high working voltages.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If wireless charging capacitor polar plates and capacitance detection polar plate are both equipped in the electronic device, then both wireless charging function and capacitance detection function are provided, but the devices stack and occupy large space causing safety hazards due to high working voltage

Engineering Contradiction:

ImprovefunctionalityVSAvoidsafety

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies multi-functionality by enabling the first polar plate to serve dual purposes: wireless charging and capacitance detection. The circuit switching module controls a switch to connect the first polar plate to either the charging control module (for wireless charging) or the capacitance detection module (for capacitance detection), allowing one component to perform multiple functions and eliminating the need for separate polar plates for each function.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If wireless charging capacitor polar plates and capacitance detection polar plate are both equipped in the electronic device, then both wireless charging function and capacitance detection function are provided, but the devices stack and occupy large space

Engineering Contradiction:

ImprovefunctionalityVSAvoidspace occupation

Core Design Contradiction:

Adaptability or versatilityVSVolume of moving object

Solution Approach 1:

The patent applies multi-functionality by enabling the first polar plate to serve dual purposes: wireless charging and capacitance detection. The circuit switching module controls a switch to connect the first polar plate to either the charging control module (for wireless charging) or the capacitance detection module (for capacitance detection), allowing one component to perform multiple functions and eliminating the need for separate polar plates for each function.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent merges the wireless charging polar plate and capacitance detection polar plate into a single first polar plate. By combining these two previously separate components into one shared polar plate, the overall device volume and space occupation are reduced while maintaining both wireless charging and capacitance detection capabilities through circuit switching.

Inventive Principle:

Principle #5Merging (Combining)

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 effectively prevents device stacking and enhances safety by allowing controlled charging and capacitance detection through the first polar plate, mitigating safety hazards associated with high working voltages during wireless charging.

Implementation Method 1

the charging control module performs charging through the first polar plate and a second polar plate of a charging device, to wirelessly charge the electronic device

Methodology Applied

Scientific EffectElectromagnetic coupling: Electromagnetic Induction

Implementation Method 2

detect a capacitance change between an external dielectric object and the electronic device through a configured capacitance detection polar plate

Methodology Applied

Scientific EffectCapacitance detection: Capacitance

Data Source

PatentEP4113778B1Circuit control apparatus and method

Publication Date: 2024.07.31 VIVO MOBILE COMM CO LTD

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AI summary

Disclosed in the embodiments of the present invention are a circuit control apparatus and method. The circuit control apparatus is applied to an electronic device, and comprises a charging control module, a circuit switching module, a capacitance measurement module, a first switch, and a first polar plate. The first switch comprises a first common end, a second end, and a third end. The first polar plate is electrically connected to the first common end. The charging control module is electrically connected to the second end. The capacitance measurement module is electrically connected to the third end.