Directable Vehicle Headlight Using Liquid Crystal Switching
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Solution Overview
Problem
Current vehicle headlight systems are mechanically directed, making them expensive and prone to wear, and require separate units for left and right-hand drive vehicles, necessitating modifications when traveling between regions with different driving conventions.
Innovation Solution
A directable light system featuring a light source, a reflector, and a light switching layer with a liquid crystal panel that can be configured to be either transparent or opaque, controlled by a light controller to adjust the beam directionality for left or right-hand drive roads, as well as for steering and beam angle adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mechanical direction systems are used for vehicle headlights, then the headlights can be directed to point in the intended travel direction, but the system becomes expensive and prone to wear
Solution Approach 1:
The patent replaces mechanical moving mirror systems with a fixed reflector combined with a light switching layer (liquid crystal display) that uses electrical signals to control light transmission. This substitution eliminates mechanical wear and improves reliability while maintaining beam direction control capability through electronic switching of different reflector segments.
2Ease of manufacture
If separate headlight units are produced for left and right hand drive vehicles, then the dipped headlight beam can be directed toward the curb, but modifications are required when traveling between regions with different driving conventions
Solution Approach 1:
The patent creates a universal headlight unit with a fixed reflector divided into multiple segments and a light switching layer that can be electronically reconfigured. The same physical unit can be adapted to different driving conventions (left-hand or right-hand drive) by changing the control signals to the light switching layer, eliminating the need for separate headlight units for different regions.
3Device complexity
If a fixed reflector is used to form the light beam, then the optical path is simplified, but the beam direction cannot be changed without mechanical components
Solution Approach 1:
The patent divides the fixed reflector into multiple segments (first reflector portion, second reflector portion, etc.) positioned at different distances from the light source. Each segment can be independently controlled by the light switching layer to direct light in different directions. This segmentation allows beam direction change without mechanical movement of the entire reflector, maintaining optical simplicity while enabling directional control.
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 system provides a cost-effective, wear-resistant, and adaptable solution for directing vehicle headlights, ensuring proper illumination and minimizing glare for oncoming traffic across different driving conventions without the need for multiple headlight units.
Implementation Method 1
said light switching layer comprises a liquid crystal panel
Data Source
AI summary
A directable light, the light comprising: a light source for generating light; a first reflector for forming said generated light into a beam; a light switching layer, located between said light source and said first reflector, said light switching layer comprising a plurality of portions, each of said portions having at least two states, in a first state said light switching layer being substantially transparent to said generated light and in a second state said light switching layer being substantially opaque to said generated light; and a light controller which determines which of said portions of said light switching layer are substantially transparent and which of said portions of said light switching layer are substantially opaque.