Vehicle Windscreen Sunshade With Layered Liquid Crystal Shading
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle sunshade systems require effort to actuate, have static shading effects, can detach or fragment in impacts, and lack automatic adjustment based on sunlight angles, affecting visual comfort and safety.
Innovation Solution
A sunshade system with dynamic adjustment using liquid crystal films between conductive polymer layers, automatically adjusting shading based on sunlight angles and vehicle position, with electrical drive elements for effortless control and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mechanically adjustable rollers are used for sunshade, then shading effect can be freely set, but the system requires effort to actuate and has static shading
Solution Approach 1:
The patent replaces mechanical adjustment systems with electrochromic films that change optical properties electrically. The sunshade layers are controlled by electrical signals rather than mechanical actuators, enabling effortless operation while achieving dynamic automatic adjustment based on sunlight conditions.
Solution Approach 2:
The patent uses electrochromic materials that change their optical transmission parameter in response to electrical voltage. By applying different voltages, the sunshade layers can dynamically adjust their shading level, transitioning from transparent to opaque states without mechanical movement.
2Adaptability or versatility
If electrically polarizable films with zonal shading are used, then chromatic range is modified, but automatic adjustment based on sunlight angle is not achieved
Solution Approach 1:
The patent incorporates sensors that detect sunlight angle and intensity, providing feedback to the control system. This enables automatic adjustment of the electrochromic layers' shading levels based on real-time environmental conditions, while maintaining natural color perception through proper control algorithms.
3Reliability
If mechanically adjustable sunshades are used, then shading control is achieved, but the system can detach or fragment in impacts
Solution Approach 1:
The patent uses flexible electrochromic films instead of rigid mechanical components. These thin films are bonded to the windscreen using flexible adhesives, creating an integrated structure that moves with the vehicle and resists detachment or fragmentation during impacts.
4Ease of operation
If constant shading in adjacent steps is used, then homogeneous shadow distribution is achieved, but dynamic adjustment based on sunlight angle is not possible
Solution Approach 1:
The patent divides the sunshade into multiple independent electrochromic layers, each controllable separately. This segmentation allows different zones to be adjusted independently based on sunlight angle and intensity, achieving dynamic adaptation while maintaining a relatively simple overall structure.
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
Provides enhanced visual comfort and safety by dynamically controlling shading, preserving color perception and ensuring reliable operation without maintenance, applicable to various vehicles and transportation modes.
Implementation Method 1
a sunshade in the form of a layered package 1, comprising films with liquid crystals dispersed between conductive layers of polymers (or Polymer-Dispersed Liquid Crystal)
Implementation Method 2
comprising films with liquid crystals dispersed between conductive layers of polymers
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Summary: Sunshade system with dynamic adjustment for vehicles windscreen, assumes the gradual controlled shading, in the vertical plane of the windscreen, by progressively power supplying the elements arranged stratified in a package of films, transparent when not powered and opaque when powered, both manually, depending on the user's will, as well as automatically, depending on the elevation angle of the sun and vehicle towards the horizontal plane, so as to provide a distinctive alternative for the construction of sunshades adjacent to the vehicles windscreen.