Motor-Adjusted Headlamp Optics for Variable Light Resolution
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Solution Overview
Problem
Existing lighting devices for motor vehicles require multiple modules to achieve different light distributions with varying resolutions, leading to complex designs and higher costs.
Innovation Solution
A lighting device with a variable focal length projection lens, adjustable via a motor, allowing continuous adjustment of pixel density without the need for multiple modules, using a solid-state LED array and a lens assembly that can be moved or adjusted to change focal length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple modules with different resolutions are used to generate different light distributions, then different resolutions can be achieved, but the device complexity and cost increase
Solution Approach 1:
The patent applies the dynamics principle by making the focal length of the projection lens variable rather than fixed. The adjuster (motor) enables continuous adjustment of the focal length, allowing a single module to dynamically adapt and generate different light distributions with varying resolutions. This eliminates the need for multiple fixed-resolution modules, thereby reducing device complexity while maintaining versatility.
Solution Approach 2:
The patent applies the parameter changes principle by varying the focal length parameter of the projection lens to achieve different resolutions. By adjusting the focal length through the adjuster mechanism, the same imaging component can produce light distributions with different pixel densities and resolutions, replacing the need for multiple modules with different fixed parameters.
2Adaptability or versatility
If multiple modules with different resolutions are used, then different light distributions can be generated, but the manufacturing cost increases
Solution Approach 1:
The patent applies the universality principle by designing a single projection lens module that can perform multiple functions by adjusting its focal length. This universal module can generate various light distributions with different resolutions, replacing multiple specialized modules and thereby reducing manufacturing costs while maintaining adaptability.
Solution Approach 2:
The dynamic adjustment capability allows a single module to replace multiple static modules, reducing the overall system cost. The motor-driven focal length adjustment enables one module to achieve what previously required multiple modules, simplifying manufacturing and reducing expenses.
3Device complexity
If the focal length is fixed, then the module design is simpler, but different resolutions cannot be achieved without multiple modules
Solution Approach 1:
The patent introduces a motor-driven adjuster mechanism that enables dynamic focal length adjustment within the module. This dynamic element allows a single module design to achieve multiple resolutions by varying the focal length, maintaining relative design simplicity while gaining adaptability.
Solution Approach 2:
By making the focal length parameter variable through the adjuster mechanism, the module can change its optical properties to generate different resolutions. This parameter change approach allows one module to replace multiple modules with different fixed parameters.
4Object-affected harmful factors
If the projection lens is moved to minimize field of view when shut off, then the LED array is protected from sunlight, but the device complexity increases
Solution Approach 1:
The patent applies the self-service principle by utilizing the existing adjuster mechanism (motor) already present for focal length adjustment to also perform the protective function of minimizing field of view when the lighting device is shut off. This multi-functional use of the existing component protects the LED array from sunlight without requiring additional dedicated protection mechanisms, thereby avoiding increased device complexity.
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
Enables simpler and cost-effective generation of different light distributions with adjustable resolutions, supporting various vehicle lighting needs and video projections, while protecting the LED array from sunlight.
Implementation Method 1
a projection lens with which the light emitted from the active surface is projected outward from the motor vehicle
Data Source
AI summary
A lighting device for a motor vehicle includes an imaging component that has an active surface on which light-emitting diodes or laser diodes are arranged, a projection lens with which the light emitted from the active surface is projected outward from the motor vehicle when the lighting device is in operation, and an adjuster connected to the projection lens. The projection lens includes a lens assembly having one or more lenses, and the adjuster varies the focal length of the projection lens in a continuous manner by generating motion of the lens assembly relative to the imaging component.