Electro-Optical Vehicle Mirror Assembly Without Mechanical Adjustment
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Solution Overview
Problem
Existing vehicle side mirrors face issues such as mechanical wear, noise, slow response, and limited visibility due to mechanical adjustment mechanisms, especially in low temperature conditions, and camera-based systems suffer from reduced dynamic range and power failure vulnerabilities.
Innovation Solution
Implementing an electro-optical switchable mirror system with a solid-state thin film device or transition-metal switchable mirrors that can transition between reflective and transparent states based on vehicle states or driver inputs, eliminating the need for mechanical adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical adjustment mechanisms are used to adjust side mirrors, then the mirrors can be adjusted to different angles, but the mechanisms wear out or break over time especially in low temperature conditions
Solution Approach 1:
The patent replaces mechanical adjustment mechanisms with an electro-optical system using switchable mirrors. The mirrors can switch between reflective and transparent states electronically, eliminating motors and mechanical linkages that wear out in cold temperatures. This substitution directly resolves the reliability issue by removing the vulnerable mechanical components.
Solution Approach 2:
The patent changes the operational parameter from mechanical movement to optical state switching. Instead of physically moving mirror components, the system changes the optical properties of the mirror surface by switching between reflective and transparent states, thereby eliminating wear and tear associated with mechanical adjustment.
2Ease of operation
If mechanical adjustment mechanisms are used to adjust side mirrors, then the mirrors can be adjusted to different angles, but the adjustment process is slow and noisy
Solution Approach 1:
The electro-optical switchable mirror system eliminates mechanical movement entirely. The mirrors switch states electronically in milliseconds without mechanical inertia or friction, providing instant adjustment response and eliminating noise from mechanical components.
3Adaptability or versatility
If a physical mirror is replaced with a camera and display, then adjustment flexibility is improved, but the system suffers from reduced dynamic range and sensitivity in low light conditions
Solution Approach 1:
Instead of using a camera to capture and display an image (creating a copy), the patent uses switchable mirrors that optically redirect light paths. This maintains the full dynamic range and light sensitivity of optical reflection while achieving viewing angle flexibility through electro-optical switching rather than electronic imaging.
4Adaptability or versatility
If a camera and display system is used instead of a physical mirror, then adjustment flexibility is improved, but the system fails safely when vehicle power is lost
Solution Approach 1:
The switchable mirrors are designed to maintain their reflective state without power, automatically providing mirror functionality when vehicle power is lost. This passive fail-safe behavior ensures the driver retains mirror capability during power failures without requiring active power supply or complex control systems.
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
Enhances mirror adjustment speed and reliability, improves visibility by allowing simultaneous viewing of multiple angles without mechanical wear, and ensures continuous operation even in low light or power loss conditions.
Implementation Method 1
a first mirror disposed in the opening of the housing and switchable between a reflective state and a transparent state
Implementation Method 2
The switchable mirror may be a solid-state thin film device made from a liquid crystal material, which can be switched between pure reflection, half-reflection and total transparent states
Data Source
AI summary
Systems and methods are provided for a vehicle mirror assembly. The vehicle mirror assembly comprises a housing comprising an opening and a cavity, a first mirror switchable between a reflective state and a transparent state, the first mirror disposed in the housing opening, and a second mirror disposed in the housing cavity behind the first mirror. The vehicle mirror assembly also comprises control circuitry coupled to the first mirror, wherein the control circuitry is configured to receive a first signal indicating a first vehicle state; transmit, based on the first signal, a second signal for switching the first mirror from the transparent state to the reflective state; receive a third signal indicating a second vehicle state; and transmit, based on the third signal, a fourth signal for switching the first mirror from the reflective state to the transparent state.