Wireless Power Transfer for Vehicle Window Glass Transparency Control

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Solution Overview

Problem

Conventional devices for varying window glass transparency in vehicles face issues such as excessive noise and strain on connectors due to wired power transmission, and a complex assembly process.

Innovation Solution

An apparatus using wireless power transfer to control the transparency of window glass, comprising a controller on the vehicle door, a wireless power receiver on the window glass, and a film with variable transparency, where the controller converts DC power to AC for electromagnetic induction to adjust the transparency of the film.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If wired power transmission is used to control window glass transparency, then power can be reliably transmitted to the film, but excessive noise is generated when the door is opened and closed due to wiring clearance issues

Engineering Contradiction:

Improvepower transmission reliabilityVSAvoidnoise

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the mechanical wired power transmission system with a wireless electromagnetic power transmission system. The controller mounted on the vehicle door uses electromagnetic induction to transmit power to the window glass without physical wiring, thereby eliminating noise caused by wiring movement during door operation while maintaining reliable power delivery to the transparency control film.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces electromagnetic fields as an intermediary medium to transmit power between the controller and the window glass. This intermediary allows energy transfer without direct physical connection, solving the noise problem caused by wiring while ensuring continuous and reliable power supply for film transparency control.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Use of energy by moving object

If wired power transmission is used to control window glass transparency, then power can be delivered to the film, but strain on connectors occurs as the window glass is raised

Engineering Contradiction:

Improvepower delivery to filmVSAvoidconnector durability

Core Design Contradiction:

Use of energy by moving objectVSStrength

Solution Approach 1:

The patent replaces the mechanical connector system with a wireless electromagnetic power transmission system. By eliminating physical wiring and connectors between the controller and window glass, the system avoids strain and potential failure of connectors during window glass movement, while maintaining continuous power delivery to the transparency control film.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Ease of operation

If wired power transmission with clearance for wiring is provided, then the window glass can move up and down, but the assembly process becomes complicated and inefficient

Engineering Contradiction:

Improvewindow glass movementVSAvoidassembly process complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent replaces the complex wired power transmission system with a wireless electromagnetic system. This eliminates the need to provide clearance for wiring during assembly, simplifies the connection between controller and window glass, and maintains full window glass mobility, thereby making the assembly process more efficient and less complex.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

4Ease of operation

If wiring is given sufficient clearance to correspond to movement distance of the window glass, then the window glass can move freely, but excessive noise is generated when the door is opened and closed

Engineering Contradiction:

Improvewindow glass movement freedomVSAvoidnoise during door operation

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the mechanical wiring system with a wireless electromagnetic power transmission system. This allows the window glass to move freely without requiring clearance for wiring, while simultaneously eliminating the noise generated by wiring movement during door operation, as there is no physical wiring to move or create friction.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 noise and strain on connectors, simplifies the assembly process, and enhances the durability and cost-effectiveness of the system by eliminating the need for wired connections.

Implementation Method 1

a transmitting coil wirelessly transmitting the power to the wireless power receiver by electromagnetic induction

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

The wireless power receiver may include a receiving coil wirelessly receiving the power from the power transmission control module by electromagnetic induction

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS10946729B2Apparatus for varying transparency of window glass using wireless power transfer

Publication Date: 2021.03.16 HYUNDAI MOTOR CO LTD

AI summary

An apparatus for varying the transparency of a window glass can include: a window glass having a film with variable transparency; a pair of electrodes connected to the film; a controller mounted on a vehicle door of a vehicle, the controller controlling a wireless transfer of power for adjusting the transparency of the film; and a wireless power receiver mounted on the window glass, the wireless power receiver wirelessly receiving the power from the controller. The wireless power receiver can apply the power wirelessly received from the controller to the pair of electrodes.