Vehicle Window Transmittance Control for Driver Side Visibility

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Solution Overview

Problem

The reduction in transmittance of vehicle windows for video output interferes with a driver's ability to visually confirm the vehicle exterior during maneuvers, potentially compromising safety.

Innovation Solution

An information processing device that detects a driver's confirmation operation and adjusts the transmittance of windows accordingly, ensuring visibility by temporarily stopping video output and increasing transmittance when necessary.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If transmittance of vehicle windows is reduced for video output, then video display function is improved, but driver visibility of vehicle exterior is worsened

Engineering Contradiction:
Improvevideo display functionVSAvoiddriver visibility
Core Design Contradiction:
Adaptability or versatilityVSIllumination intensity

Solution Approach 1:

The window transmittance is made dynamically adjustable rather than fixed. The system switches between different transmittance states (first transmittance for video output, second transmittance for driver visibility) based on real-time detection of driver confirmation operations, allowing the window to adapt its optical properties to different operational requirements.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The system detects confirmation operations (such as lane change intentions) in advance and proactively adjusts window transmittance before the driver actually needs to view the exterior. By monitoring driver inputs and vehicle state, the system prepares the optimal transmittance state ahead of time, ensuring visibility is restored before critical viewing moments occur.

Inventive Principle:
Principle #10Preliminary action

2Illumination intensity

If video output is completely halted to maintain visibility, then driver visibility is improved, but video output continuity is worsened

Engineering Contradiction:
Improvedriver visibilityVSAvoidvideo output continuity
Core Design Contradiction:
Illumination intensityVSProductivity

Solution Approach 1:

Instead of uniformly halting video output across all windows, the system selectively adjusts transmittance only of specific windows (front side windows or rear side windows) based on the detected confirmation operation direction. This allows video output to continue in other windows while maintaining driver visibility where needed, preserving video functionality in non-critical areas.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The system applies partial action by adjusting transmittance of only the necessary window(s) rather than all windows. Video output is maintained in windows that do not interfere with driver confirmation, achieving the minimum necessary adjustment to restore visibility while preserving overall video output continuity and functionality.

Inventive Principle:
Principle #16Partial or excessive 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

Enhances vehicle safety by maintaining driver visibility during critical maneuvers without completely halting video output.

Implementation Method 1

a technique for electronically controlling transmittance of a window of an automobile has been proposed

Methodology Applied
Scientific EffectElectrochromism: Electrochromism

Data Source

PatentUS12475715B2Information processing device and vehicle
Publication Date: 2025.11.18 TOYOTA JIDOSHA KK
  • US12475715B2 patent drawing
  • US12475715B2 patent drawing
  • US12475715B2 patent drawing

AI summary

An information processing device comprises a controller configured to execute: detecting that a confirmation operation that is an operation of visually confirming a side portion of a first vehicle is performed by a driver of the first vehicle; and performing control that sets transmittance of a window lying in a corresponding direction at a predetermined value if the confirmation operation is detected.