Vehicle Cabin Lighting Control for Mobile Screen Glare

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Solution Overview

Problem

Vehicle cabin lighting systems reflect light from mobile terminals' display screens into drivers' eyes, causing discomfort, especially when the placement area is located in the lower portion of the front console but can also occur in other locations.

Innovation Solution

A vehicle cabin lighting system that includes a lighting device, a lighting control device, and a wireless charger, where the lighting control device dims or turns off the lighting device when a mobile terminal is detected using infrared detection or wireless charging signals to reduce the brightness of reflected light entering the driver's field of vision.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If the lighting device is kept on to illuminate the placement area, then the visibility of articles in the placement area is improved, but the reflected light from mobile terminal display screens enters the driver's field of vision causing discomfort

Engineering Contradiction:
Improvevisibility of placement areaVSAvoiddriver discomfort from reflected light
Core Design Contradiction:
Illumination intensityVSObject-affected harmful factors

Solution Approach 1:

The patent replaces manual lighting control with an automated system that uses wireless charger detection to trigger lighting adjustments. The control device automatically dims or turns off the lighting device when a mobile terminal is detected on the wireless charger, eliminating the need for manual intervention while resolving the contradiction between illumination and driver comfort.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent dynamically changes the lighting parameters (brightness level) based on the presence of a mobile terminal. When a mobile terminal is detected on the wireless charger, the system changes the lighting state from bright to dimmed or off, adapting the illumination intensity to the specific usage scenario to prevent reflected light discomfort while maintaining visibility when needed.

Inventive Principle:
Principle #35Parameter changes

2Object-affected harmful factors

If the lighting device is dimmed or turned off when a mobile terminal is detected, then driver discomfort from reflected light is reduced, but the visibility of articles in the placement area deteriorates

Engineering Contradiction:
Improvedriver discomfort from reflected lightVSAvoidvisibility of placement area
Core Design Contradiction:
Object-affected harmful factorsVSIllumination intensity

Solution Approach 1:

The patent implements dynamic lighting control that adapts to real-time conditions. The lighting device transitions between different states (on, dimmed, off) based on the presence and state of mobile terminals on the wireless charger. This dynamic adjustment resolves the contradiction by providing illumination only when necessary, rather than maintaining a fixed lighting state.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The system performs preliminary detection of mobile terminals on the wireless charger before the lighting issue becomes problematic. By detecting the presence of a mobile terminal in advance, the control device can proactively adjust the lighting to prevent reflected light discomfort, rather than reacting after the problem occurs.

Inventive Principle:
Principle #10Preliminary action

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 system effectively reduces the brightness of reflected light from mobile terminals, minimizing driver discomfort by adjusting the lighting based on the presence of a mobile terminal in the placement area, thereby improving the driving environment.

Implementation Method 1

The wireless charger is configured to charge, in a non-contact manner, a mobile terminal placed in the placement area

Methodology Applied
Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

The lighting device includes a light source and is configured to illuminate a placement area in which an article is to be placed

Methodology Applied
Scientific EffectLight emission: Light Emitting Diode

Data Source

PatentUS11999292B2Vehicle cabin lighting system
Publication Date: 2024.06.04 SUBARU CORP
  • US11999292B2 patent drawing
  • US11999292B2 patent drawing
  • US11999292B2 patent drawing

AI summary

A vehicle cabin lighting system includes a lighting device, a lighting control device, and a wireless charger. The lighting device is configured to illuminate a placement area in which an article is to be placed. The lighting control device is configured to control brightness of the lighting device. The wireless charger is configured to charge, in a non-contact manner, a mobile terminal placed in the placement area. The lighting control device is configured to execute, in response to detecting that the mobile terminal is placed in the placement area based on an operation of the wireless charger, a control by which the lighting device is turned off or dimmed.