Vehicle Headlamp Variable Mirror Segmented Reflection
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Solution Overview
Problem
Existing vehicle headlamp systems face challenges in maintaining uniform brightness and symmetry of images projected onto the road surface when using projection lamps, leading to non-uniformity and safety concerns, especially when a single projection lamp is applied to both headlamps.
Innovation Solution
A projection lamp module and headlamp device featuring a variable mirror with divided reflective regions and a lens system that allows light from different regions to be reflected and projected with distinct lighting functions, ensuring both headlamps emit light of the same brightness and maintain vertically symmetric images, utilizing a digital micro-mirror device to adjust light angles and implement Daytime Running Lights (DRL) and image projection functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single projection lamp is applied to both headlamps, then image projection function is achieved, but brightness uniformity between headlamps deteriorates
Solution Approach 1:
The headlamp system is segmented into two independent optical paths: one for projection lamp function and one for general lighting function. Each headlamp can independently select which function to activate, allowing brightness uniformity to be maintained by ensuring both headlamps have identical lighting capabilities, while still enabling image projection on one side without affecting the other.
Solution Approach 2:
The headlamp system dynamically switches between different lighting functions (projection vs. general lighting) based on driving conditions. The control unit enables selective activation of projection lamp or general lighting lamp in each headlamp, allowing the system to adapt to various scenarios while maintaining brightness uniformity by ensuring both headlamps have equivalent optical components.
2Adaptability or versatility
If projection lamp is applied to one headlamp, then image projection is enabled, but vertical symmetry of lamp images deteriorates
Solution Approach 1:
The system intentionally allows asymmetric configuration where one headlamp can be configured for projection while the other remains a standard lighting lamp. This asymmetric setup is acceptable because the projection function is only active when needed, and during normal lighting operation, both headlamps maintain symmetric appearance and brightness.
3Adaptability or versatility
If projection lamp is used, then image formation function is achieved, but recognition of vehicle by lamp images deteriorates
Solution Approach 1:
The projection lamp operates periodically or on-demand rather than continuously. During normal driving conditions, the general lighting lamp provides continuous illumination for vehicle recognition. Image projection is activated only when specific conditions are met (e.g., pedestrian detection, specific driving scenarios), ensuring that vehicle recognition is not compromised while still providing image formation functionality when needed.
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 solution ensures consistent brightness and symmetry of images projected onto the road surface, enhancing vehicle visibility and compliance with safety regulations by allowing each headlamp to emit light with specific functions, improving the exterior design and recognition of the vehicle.
Implementation Method 1
a variable mirror configured to reflect the light emitted from the light source and having divided reflective regions
Implementation Method 2
a lens configured such that the light reflected by the variable mirror is introduced into the lens, and the light having a lighting function different from the particular lighting function is transmitted through the lens and projected onto a road surface
Data Source
AI summary
The present disclosure provides a projection lamp module and a headlamp device for a vehicle using the same, in which two headlamps implement the same brightness, images of the headlamps are maintained, and visibility of an image projected onto a road surface is improved even though even though a lamp having a lighting function of forming an image on a road surface is applied to any one of the headlamps for a vehicle.