Vehicle Window Display Structure With UV-Blocked Perovskite Layers
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Solution Overview
Problem
Existing vehicle displays, particularly those using head-up displays on windshields, are limited in their ability to provide illuminated images across multiple windows and do not effectively block harmful UV light from activating perovskite nanocrystals, leading to potential degradation and reduced visibility.
Innovation Solution
A vehicle window structure with inner and outer glass layers, incorporating a first polymer layer with perovskite nanocrystals activated by UV light to emit visible light and a second layer blocking UV light below 400 nm, combined with a projector to selectively project UV light onto the window to form illuminated images, using lasers for precise wavelength control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If perovskite nanocrystals are incorporated into the window to enable UV-activated visible light emission for display purposes, then illumination intensity and display capability are improved, but harmful UV light from sunlight can unintentionally activate the nanocrystals causing degradation and reduced visibility
Solution Approach 1:
A UV-blocking layer is introduced as an intermediary component between the perovskite nanocrystals and sunlight. This layer selectively blocks harmful UV wavelengths while permitting the projector's controlled UV light to activate the nanocrystals for display purposes, thus preventing unintended activation by sunlight while maintaining display functionality
Solution Approach 2:
The window structure is designed with spatially differentiated UV transmission properties. The UV-blocking layer creates localized UV protection at the outer window surface, while the perovskite nanocrystals embedded in the polymer layer maintain their UV sensitivity only in controlled regions where the projector can access them, enabling selective activation
2Reliability
If a UV-blocking layer is added to prevent sunlight activation of perovskite nanocrystals, then reliability and prevention of degradation are improved, but device complexity and manufacturing complexity increase
Solution Approach 1:
The window is constructed as a composite structure integrating multiple functional layers: glass layers for structural integrity, polymer layers containing perovskite nanocrystals for display functionality, and UV-blocking layers for protection. This composite approach combines materials with complementary properties to achieve both display capability and UV protection while maintaining overall system reliability
3Adaptability or versatility
If head-up displays are used on windshields, then basic display functionality is provided, but the ability to provide illuminated images across multiple windows and enhance entertainment options is limited
Solution Approach 1:
The perovskite-based display system is designed with universal applicability across multiple window types (windshield, side windows, rear window). The same UV-activated perovskite mechanism and projector technology can be deployed on any window surface, enabling versatile display and entertainment functionality throughout the vehicle without requiring different display systems for different locations
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
Enables the formation of illuminated images across various vehicle windows, including the windshield, while preventing UV activation and enhancing sound insulation, thus providing enhanced visibility and entertainment options in autonomous vehicles.
Implementation Method 1
perovskite nanocrystals that are activated by UV light in the range of about 340 nm-about 380 nm, and emit visible light having a wavelength in the range of about 450 nm-about 750 nm
Implementation Method 2
a second layer of polymer material between the outer layer of glass and the first layer of polymer material. At least a portion of the second layer of polymer material blocks UV light having wavelength of 400 nm or less to prevent activation of the perovskite nanocrystals by UV sunlight
Data Source
AI summary
An autonomous vehicle includes a window having first and second layers of polymer material between inner and outer layers of glass. The first layer of polymer material includes perovskite crystals that are activated by UV light and emit visible light. The second layer of polymer material is disposed between the outer layer of glass and the first layer of polymer material. The second layer of polymer material blocks UV sunlight to prevent activation of the perovskite crystals. The vehicle further includes a projector that is configured to project UV light onto the inside of the window to form illuminated images on the window.