Vehicle Display Window Using S-Polarized Light for Brighter Projection

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Solution Overview

Problem

Existing vehicle window glass is limited in function and cannot meet the diverse usage requirements of users, particularly in enhancing image projection capabilities and integrating multiple functionalities without increasing luminous intensity.

Innovation Solution

A display window system incorporating window glass with a projection device that projects S-polarized light onto specific regions, utilizing an enhanced reflection coating to achieve high reflectivity and brightness for distinct image projections, allowing simultaneous display of entertainment and driving information without increasing luminous intensity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If the luminous intensity of the projection device is increased to improve image quality, then projection brightness improves, but the component volume and power requirements increase

Engineering Contradiction:

Improveprojection brightnessVSAvoidcomponent volume

Core Design Contradiction:

Illumination intensityVSVolume of moving object

Solution Approach 1:

Instead of increasing the luminous intensity of the projection device, the patent changes the optical parameters of the window glass itself. By optimizing the glass reflectivity (at least 25%) and polarization characteristics for S-polarized light at specific angles, the system achieves improved projection brightness while keeping the projection device compact and power-efficient.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention replaces the approach of increasing projection device power (mechanical/electrical system enhancement) with an optical property modification of the window glass. This substitution allows achieving the same brightness improvement goal through optical parameter optimization rather than through increasing the size and power of the projection device.

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

The system enhances the functionality of vehicle windows by enabling clear and high-quality projection images for both front-seat passengers and drivers, improving usability and safety by reducing the need for increased luminous intensity and component volume.

Implementation Method 1

At least 90% of each of the at least one beam of projection light is S-polarized light

Methodology Applied

Scientific EffectS-polarized light: Polarisation

Implementation Method 2

The first projection region has a first reflectivity of at least 25% for the first projection light projected at the first angle of incidence

Methodology Applied

Scientific EffectReflection: Reflection

Data Source

PatentUS12596252B2Display window and vehicle

Publication Date: 2026.04.07 FUYAO GLASS IND GROUP CO LTD

AI summary

A display window and a vehicle are provided. The display window includes window glass and at least one projection device. The at least one projection device is configured to generate at least one beam of projection light, and correspondingly project the at least one beam of projection light onto at least one projection region of the window glass to correspondingly form at least one projection image. At least 90% of each of the at least one beam of projection light is S-polarized light. The at least one beam of projection light includes first projection light. The at least one projection region includes a first projection region. The first projection region has a first reflectivity of at least 25% for the first projection light projected at the first angle of incidence.