Vehicle Window Glass With Switchable Dimming for Projection Privacy
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Solution Overview
Problem
Existing vehicle-mounted projection systems face challenges in adjusting projection occasions, image quality, image content privacy, and durability, particularly in vehicle door glass applications, with issues such as low light transmittance, excessive haze, low resolution, and short service life, which affect user experience and compliance with vehicle regulations.
Innovation Solution
A vehicle window glass integrating an imaging layer and a dimming film between two glass bodies, allowing adjustable light transmittance and haze to enhance projection effects and provide privacy, compatible with a projection device for interior and exterior display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a projection system is applied to vehicle door glass, then projection function is achieved, but light transmittance decreases and haze increases
Solution Approach 1:
The patent applies a switchable dimming film that can dynamically adjust between transparent and opaque states. When projection is needed, the film switches to opaque state to enhance projection effect; when projection is not needed, it switches to transparent state to maintain light transmittance. This dynamic switching resolves the contradiction between achieving projection function and maintaining light transmittance.
Solution Approach 2:
The dimming film changes its optical parameters (light transmittance and haze) based on projection requirements. By controlling the film's transition between different optical states, the system can optimize light transmittance during non-projection periods and enhance projection visibility during projection periods, thus resolving the contradiction.
2Adaptability or versatility
If projection function is added to vehicle window glass, then display capability is improved, but image clarity deteriorates due to excessive haze
Solution Approach 1:
The switchable dimming film dynamically adjusts its haze level based on projection mode. When projection is active, the film transitions to an opaque state with controlled haze to enhance image clarity. When projection is inactive, it transitions to a transparent state with minimal haze, thus resolving the contradiction between display capability and image clarity.
3Adaptability or versatility
If projection system is integrated into vehicle window glass, then projection function is achieved, but privacy protection deteriorates
Solution Approach 1:
The dimming film can switch between transparent and opaque states to provide privacy protection. When projection displaying sensitive information is active, the film transitions to opaque state to prevent outsiders from viewing the content. When projection is inactive or displaying non-sensitive content, it transitions to transparent state, thus resolving the contradiction between projection function and privacy protection.
4Adaptability or versatility
If projection system is applied to vehicle door glass, then projection capability is improved, but service life decreases
Solution Approach 1:
The patent integrates the projection function with the vehicle window glass by incorporating the dimming film and projection layer into the glass structure itself. This merging approach eliminates the need for separate external projection components that would have shorter service lives, thereby improving overall system durability while maintaining projection capability.
Solution Approach 2:
The vehicle window glass is constructed as a composite structure combining glass layers, dimming film, and projection layers. This composite material approach ensures that all components are designed to withstand vehicle environmental conditions and have matched service lives, resolving the contradiction between projection capability and service life.
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 provides enhanced image clarity and privacy protection, meeting user requirements for diverse display modes without affecting the glass's performance or aesthetics, and ensuring compliance with vehicle durability standards.
Implementation Method 1
the dimming film is configured to be capable of adjusting light transmittance and/or haze to enhance the projection effect of the imaging layer and/or provide privacy effect
Implementation Method 2
the dimming film is configured to be capable of adjusting light transmittance and/or haze to enhance the projection effect of the imaging layer
Data Source
AI summary
A vehicle window glass is suitable for cooperating with a projection device to provide a projection function. The vehicle window glass includes a first glass body, a second glass body, an imaging layer and a dimming film sandwiched between the first glass body and the second glass body, wherein an image projected by the projection device on one side of the vehicle window glass displays the projected image on the other side via the vehicle window glass, and the dimming film is configured to be capable of adjusting light transmittance and/or haze to enhance the projection effect of the imaging layer and/or provide privacy effect.