Liquid Crystal Mirror Lens Assembly for Rearview Glare Redirection
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Solution Overview
Problem
The excessive glare from high beam headlights reflected in rearview mirrors can cause dizziness and temporary blindness in drivers, especially at night, due to the high intensity and sudden change in illumination, posing a significant safety hazard.
Innovation Solution
An anti-glare apparatus featuring a lens assembly with liquid crystal molecules and driving electrodes, controlled by a photoreceptor and controller to adjust the optical axis direction based on incident light intensity and eye position, effectively diverting excessive light away from the driver's eyes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual or electric methods are used to adjust the rearview mirror angle, then the reflected light can be directed away from the driver's eyes, but the reaction time is too long and some reflected light still enters the driver's eyes
Solution Approach 1:
The patent replaces manual or electric mechanical adjustment mechanisms with an optical system using a liquid crystal lens assembly. By applying voltage to the liquid crystal molecules, the optical axis direction changes, enabling rapid redirection of reflected light without mechanical movement, thus achieving instantaneous glare protection.
Solution Approach 2:
The patent changes the optical properties of the lens assembly by adjusting the voltage applied to the liquid crystal molecules. This parameter change (voltage) directly controls the orientation of liquid crystal molecules, which in turn changes the optical axis direction and redirects reflected light away from the driver's eyes.
2Illumination intensity
If the rearview mirror reflects high intensity light, then the driver can see the rear environment, but the driver experiences dizziness and temporary blindness
Solution Approach 1:
The patent applies local quality by selectively changing the optical properties of different regions of the lens assembly. By controlling which sub-electrodes receive voltage, only specific areas of the lens redirect light, allowing the driver to maintain visibility of the rear environment while protecting against glare from specific light sources.
Solution Approach 2:
The patent introduces dynamic control of the optical axis direction through voltage adjustment. The lens assembly can dynamically adapt its light redirection pattern based on the position of the light source and the driver's eyes, continuously optimizing both visibility and glare protection.
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 apparatus rapidly and precisely adjusts to reduce glare, enhancing driving safety by preventing excessive light from entering the driver's eyes, thus minimizing the risk of accidents caused by glare-induced dizziness or blindness.
Implementation Method 1
The lens assembly may include a layer of liquid crystal molecules, a first driving electrode and a second driving electrode respectively on both sides of the layer of the liquid crystal molecules
Implementation Method 2
The lens assembly may be configured to change an optical axis direction of the lens assembly by adjusting a driving voltage of at least one of the plurality of sub-electrodes
Implementation Method 3
a reflective layer on a side of the lens assembly opposite from the incident side
Data Source
AI summary
An anti-glare apparatus (100), includes a lens assembly (120) having an incident side and a reflective layer (110) on the side of the lens assembly opposite from the incident side. The lens assembly includes a layer of liquid crystal molecules, a first driving electrode (132) and a second driving electrode (131) respectively on both sides of the layer of the liquid crystal molecules; at least one of the first driving electrode or the second driving electrode comprises a plurality of sub-electrodes. The lens assembly is configured to change an optical axis direction of the lens assembly by adjusting a driving voltage of at least one of the plurality of sub-electrodes.