Dynamic Light-Shading Layer for Vehicle Windows
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Solution Overview
Problem
Conventional heat-insulating films for vehicle windows have fixed light transmittance, leading to visual discomfort due to inadequate shading or insulation, and lack the functionality to serve as a display.
Innovation Solution
A displayed light-adjustment device comprising a first and second light-transmitting layer, a display module, and an adjustable light-shading layer with a light sensing unit and control unit to dynamically adjust light transmittance and provide display capabilities, using technologies like polymer liquid crystals or electrochromic units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a conventional heat-insulating film is used with fixed light transmittance, then heat insulation is provided, but visual comfort deteriorates due to inability to adjust brightness according to environmental requirements
Solution Approach 1:
The patent applies a dynamic light-shading layer that can change its light transmittance from greater than 75% (powered off) to blocking over 99% of ultraviolet rays (powered on). This dynamic adjustment capability allows the window to adapt to different environmental lighting conditions, resolving the contradiction between providing heat insulation and maintaining visual comfort by enabling real-time brightness adjustment according to external light levels.
Solution Approach 2:
The invention changes the optical parameters of the light-shading layer by applying different voltages. When voltage is applied, the light transmittance and ultraviolet resistance values are adjusted to specific ranges, enabling the window to transition between transparent and opaque states. This parameter change approach allows simultaneous optimization of heat insulation and visual comfort based on environmental conditions.
2Temperature
If the heat insulation film is made darker to provide better shade, then heat insulation improves, but visual convenience deteriorates due to reduced light transmittance
Solution Approach 1:
The light-shading layer dynamically adjusts its darkness level through voltage control, transitioning from a light state (greater than 75% light transmittance) to a dark state (over 99% ultraviolet resistance). This dynamic capability eliminates the need to choose between dark films for heat insulation and light films for visual convenience, as the film can adapt its darkness level to the specific situation.
Solution Approach 2:
The window film achieves multi-functionality by combining heat insulation, dynamic shading, and display capabilities in a single system. The light-shading layer serves multiple purposes: providing heat insulation when dark, maintaining visual convenience when light, and displaying information when activated, thus resolving the contradiction between heat insulation and visual convenience.
3Reliability
If a traditional vehicle window is used, then basic protection functions are provided, but display functionality is lost as the window cannot serve as a display device
Solution Approach 1:
The patent transforms the vehicle window into a multi-functional device that simultaneously provides protection (windproofing, waterproofing, sand-proofing), heat insulation, dynamic shading, and display capabilities. The light-shading layer and display module enable the window to function as both a protective barrier and an information display device, resolving the contradiction between maintaining basic protection functions and adding display versatility.
Solution Approach 2:
The invention merges multiple functions into a single integrated window system: the light-shading layer combines heat insulation and shading functions, while the display module integrates information display capability. This merging approach allows the window to maintain its protective functions while simultaneously providing display functionality, eliminating the need for separate display devices.
4Illumination intensity
If a light-adjustment device with multiple layers is implemented, then light transmittance control improves, but device complexity increases due to additional components
Solution Approach 1:
The patent merges the light-shading function and display function into a single integrated structure where the light-shading layer and display module share the same space between the first and second light-transmitting layers. This merging reduces device complexity compared to having separate shading and display systems, while still achieving precise light transmittance control through the adjustable light-shading layer.
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
Adapts to varying light conditions for optimal shading or clarity, enabling the vehicle window to function as both a display and a heat-insulating screen, with adjustable light-shading layers offering high ultraviolet resistance and rapid response times.
Implementation Method 1
the adjustable light-shading layer is interposed between the first light-transmitting layer and the display module, and the light transmittance of the adjustable light-shading layer is adjustable. When the adjustable light-shading layer is powered off, the light transmittance of the adjustable light-shading layer is greater than 75%, and when the adjustable light-shading layer is powered on, an ultraviolet resistance value of the adjustable light-shading layer is greater than 99%
Implementation Method 2
the adjustable light-shading layer is one of a polymer liquid crystal unit, a suspended particle device, or an electrochromic unit
Data Source
AI summary
A displayed light-adjustment device includes two light-transmitting layers which are arranged oppositely, a display module, and an adjustable light-shading layer. The display module is stacked between the light-transmitting layers. The adjustable light-shading layer is interposed between the first light-transmitting layer and the display module, and the light transmittance of the adjustable light-shading layer is adjustable. When the adjustable light-shading layer is powered off, the light transmittance of the adjustable light-shading layer is greater than 75%, and when the adjustable light-shading layer is powered on, an ultraviolet resistance value of the adjustable light-shading layer is greater than 99%.