Electrochromic Rear-View Mirror Sealing Against Vibration Displacement
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Solution Overview
Problem
Rear-view mirrors using electrochromic films fail due to relative displacement between glass and lens during vibration, causing the film to twist and fail to change color effectively.
Innovation Solution
A rear-view mirror design with a sealing structure layer that includes a sealing layer and a structure layer, using materials like silicone adhesive or epoxy adhesive, to stabilize the electrochromic film and prevent displacement, ensuring stable color change during use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the electrochromic film is used in a rear-view mirror, then the mirror can change color to reduce glare, but the film is prone to failure due to relative displacement between glass and lens during vibration
Solution Approach 1:
The patent divides the sealing structure into multiple layers: a first sealing layer (adhesive layer) and a second sealing layer (structural layer). This segmentation allows each layer to perform its specific function - the adhesive layer provides bonding while the structural layer provides mechanical protection and displacement prevention, thereby solving the reliability issue without affecting the color change function.
Solution Approach 2:
The patent introduces a sealing structure as an intermediary between the electrochromic film and the external environment. This sealing structure includes adhesive layers and structural layers that mediate the mechanical stresses and vibrations, preventing direct damage to the electrochromic film while allowing it to maintain its color change functionality.
2Adaptability or versatility
If the electrochromic film has a multilayer structure sandwiched between glass and lens, then the film can provide electrochromic function, but relative displacement occurs in the multilayer structure during vibration causing failure
Solution Approach 1:
The patent applies sealing layers to the edges of the electrochromic film before the multilayer structure is subjected to vibration or displacement forces. This preliminary sealing action prevents the relative displacement from occurring in the first place, maintaining the stability of the multilayer structure while preserving its electrochromic adaptability.
Solution Approach 2:
The patent uses composite sealing structures combining different materials - adhesive materials for bonding and structural materials for mechanical strength. This composite approach creates a sealing structure that simultaneously provides strong adhesion to the multilayer electrochromic film and sufficient mechanical rigidity to prevent vibration-induced displacement.
3Device complexity
If no sealing structure is used, then the manufacturing process is simpler, but the electrochromic film is vulnerable to displacement and environmental damage
Solution Approach 1:
The sealing structure is segmented into functional layers applied only at the edges of the electrochromic film. This segmentation minimizes the added complexity - the sealing is confined to specific locations (edges) rather than requiring complex overall structural changes, while still providing comprehensive protection against displacement and environmental damage.
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 design provides stable color change of the electrochromic film by preventing relative displacement and enhancing waterproof performance, reducing the impact of mechanical vibration and external forces, and improving the mirror's structural stability.
Implementation Method 1
Electronic automatic anti-dazzling rear-view mirrors are in an emerging stage. However, the core material of electrochromic technology is a liquid gel electrolyte
Implementation Method 2
a first transparent adhesive layer, located between the first glass layer and the electrochromic film, a second transparent adhesive layer, located between the second glass layer and the electrochromic film
Data Source
AI summary
A rear-view mirror includes an electrochromic film, a first glass layer, a second glass layer, a first transparent adhesive layer, a second transparent adhesive layer and a sealing structure layer. The first glass layer and the second glass layer are located on two faces of the electrochromic film respectively, the first transparent adhesive layer is located between the first glass layer and the electrochromic film, the second transparent adhesive layer is located between the second glass layer and the electrochromic film, the sealing structure layer is located on edges of the first glass layer and the second glass layer, the sealing structure layer, the first glass layer and the second glass layer form a sealing structure, and the electrochromic film is sealed in the sealing structure.