Windshield Light Control System with Segmented Transmittance
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Solution Overview
Problem
Existing windshield light control systems fail to provide a secure field of view during driving while also effectively shielding light when the vehicle is not in motion, as they either compromise the field of view during driving or do not adequately control light when the vehicle is stationary.
Innovation Solution
A light control system for windshields that divides the windshield into upper and non-upper parts, allowing for adjustable visible light transmittance, with a controller managing the transmittance to ensure a secure field of view during driving and enhanced light shielding when the vehicle is not in motion by restricting the lower transmittance of the non-upper parts below a predetermined value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the visible light transmittance of the entire windshield is reduced to block direct sunlight when the vehicle is not moving, then the light-shielding property is improved, but the field of view during driving is compromised
Solution Approach 1:
The windshield is divided into two independent control regions: an upper part and a non-upper part. Each region can independently adjust its visible light transmittance according to different requirements. When the vehicle is not moving, both parts can be set to low transmittance for maximum light shielding. When driving, the upper part maintains high transmittance for field of view while the non-upper part can be adjusted independently.
Solution Approach 2:
Different regions of the windshield are assigned different light control properties based on their functional requirements. The upper part prioritizes field of view during driving, while the non-upper part focuses on light shielding when stationary. This allows each local region to have optimized quality for its specific purpose.
2Object-affected harmful factors
If the visible light transmittance of the upper part is reduced to improve light shielding, then the light-shielding property is improved, but the field of view necessary for driver is compromised
Solution Approach 1:
The windshield control system is segmented into upper and non-upper parts with independent transmittance control. The upper part is specifically designated for field of view maintenance during driving, while the non-upper part handles light shielding functions, preventing interference between these conflicting requirements.
Solution Approach 2:
The system dynamically adjusts the visible light transmittance of different windshield regions based on vehicle operating state (driving vs. stationary). During driving, the upper part maintains high transmittance for field of view. When stationary, both parts can reduce transmittance for light shielding, creating a dynamic adaptation to operational context.
3Adaptability or versatility
If the windshield allows high degree of freedom in light control to block sunlight when vehicle is not moving, then the light-shielding property is improved, but the field of view during driving is compromised
Solution Approach 1:
The windshield is divided into independently controllable upper and non-upper parts, providing high adaptability for different scenarios. This segmentation allows the system to flexibly adjust each region's transmittance based on whether the vehicle is moving or stationary, while ensuring the upper part always maintains sufficient field of view during driving.
Solution Approach 2:
The control system dynamically adapts the light transmittance characteristics of different windshield regions based on vehicle operating conditions. When the vehicle is stationary, both parts can achieve maximum light shielding. When driving, the system automatically ensures the upper part maintains appropriate transmittance for driver visibility, demonstrating dynamic adaptability to operational context.
Data Source
AI summary
A light control system for a windshield can change a visible light transmittance of an upper part and a non-upper part of each of a front windshield, a right side windshield, and a left side windshield. A controller that controls a change includes a mode changing unit that changes a mode depending on whether a vehicle is not in a driving state or in a driving state. When the vehicle is not in a driving state, a change of reducing the visible light transmittance of the upper part and the non-upper part to be lower than a predetermined value is permitted. When the vehicle is in a driving state, a change of reducing the visible light transmittance of the upper part to be lower than the predetermined value is permitted and a change of reducing the visible light transmittance of the non-upper part to be lower than the predetermined value is prohibited.