Sectorized Adaptive Screen for Vehicle Glare Protection
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Solution Overview
Problem
Existing adaptive screens for glare protection in vehicles have slow response times to sudden changes in luminosity, making them unsuitable for driving, especially in conditions like sunny weather or nighttime driving, and they consume excessive electrical energy.
Innovation Solution
An adaptive screen with multiple active zones, each controlled by a control signal to switch between maximum and minimum transmittance states, where the principal active zone covers less than 60% of the screen's surface area, reducing response time and energy consumption by minimizing the surface area of each zone and optimizing the operating regime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the surface area of the active zone is increased to cover the entire screen, then the glare protection coverage is improved, but the response time increases substantially
Solution Approach 1:
The screen is divided into multiple independent active zones (first active zone, second active zone, third active zone) that can be controlled separately. This segmentation allows each zone to respond independently to luminous transitions, achieving fast response times in critical areas while maintaining overall coverage.
Solution Approach 2:
Different active zones are assigned different surface areas and control priorities based on their specific functions. The first active zone (principal zone) has a limited surface area (≤60% of total screen) for fast response, while other zones can be larger to provide comprehensive glare protection coverage.
2Area of stationary object
If the surface area of the active zone is increased to cover the entire screen, then the glare protection coverage is improved, but the electrical energy consumption increases
Solution Approach 1:
The screen is divided into multiple independently controllable active zones, allowing selective activation based on driving conditions. This reduces overall electrical energy consumption by activating only the necessary zones rather than the entire screen.
Solution Approach 2:
Different active zones are optimized for different functions with appropriate surface areas. The first active zone has limited surface area (≤60% of total) to minimize energy consumption while maintaining fast response, and other zones are activated only when needed for comprehensive protection.
3Speed
If the response time is reduced for fast luminous transition detection, then the adaptability to driving conditions is improved, but the surface area of the active zone must be limited
Solution Approach 1:
The screen is segmented into multiple active zones with different surface areas and response characteristics. The first active zone has limited surface area (≤60% of total) to achieve fast response time, while other zones provide additional coverage without compromising the fast response capability of the principal zone.
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 adaptive screen achieves faster transmittance modifications and reduced energy consumption, improving visual comfort and convenience by quickly adjusting to varying light conditions, thus enhancing the driving experience.
Implementation Method 1
An adaptive screen (100) comprises at least one liquid crystal shutter (400)
Data Source
AI summary
An adaptive screen including at least one liquid crystal shutter. At least one of the shutters includes at least two active zones which are addressed by a control signal which permits the switchover of the at least one corresponding shutter between a passing configuration, in which a transmittance is equal to a maximum value, and a blocking configuration, in which the transmittance is equal to a minimum value. A “principal” active zone covers a surface area of the adaptive screen which is equal to or lower than 60% of the surface area of the adaptive screen, in order to reduce the response time of the principal active zone.