Headlamp Dual Lens Segmentation for Glare Reduction
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Solution Overview
Problem
Conventional headlamps cause glare in near regions due to excessive brightness of light projected immediately ahead, leading to reduced visibility of distant areas, which can result in delayed detection of pedestrians or oncoming vehicles, compromising safe driving.
Innovation Solution
A headlamp design featuring a light source, reflector, and two lens bodies that project light differently, with the first lens body transmitting high-intensity light to a narrow region far ahead and the second lens body transmitting lower-intensity light to a wider region closer to the headlamp, reducing glare and improving distant visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional headlamp projects light forward using a single lens, then the light reaches far ahead, but the road immediately ahead becomes too bright causing glare and the road far ahead appears relatively darker
Solution Approach 1:
The headlamp divides the light projection function into two separate lens bodies: a first lens body for projecting high-intensity light to distant regions and a second lens body for projecting lower-intensity light to near regions. This segmentation allows independent optimization of light distribution for each region, eliminating glare in near regions while maintaining visibility at distance.
Solution Approach 2:
The patent applies different optical properties to different parts of the lighting system. The first lens body has optical characteristics optimized for long-distance illumination, while the second lens body has characteristics optimized for near-region illumination with reduced intensity. This local quality differentiation ensures each region receives appropriate light intensity.
2Illumination intensity
If light is projected brightly to illuminate the road far ahead, then visibility at distance improves, but the road immediately ahead becomes too bright causing glare
Solution Approach 1:
The lighting system is segmented into two independent optical channels, each controlled by a separate lens body. The first lens body directs high-intensity light to distant regions for improved visibility, while the second lens body directs lower-intensity light to near regions, preventing glare and maintaining driver comfort.
Solution Approach 2:
Different optical qualities are applied locally: the first lens body provides high-intensity illumination for distant visibility, while the second lens body provides lower-intensity illumination for near regions. This local differentiation simultaneously achieves distant visibility and driver comfort.
3Illumination intensity
If a single lens projects light to both near and far regions, then the device structure remains simple, but the light distribution cannot simultaneously reduce glare and illuminate distant areas effectively
Solution Approach 1:
The single lens is divided into two separate lens bodies, each optimized for specific light distribution tasks. The first lens body handles distant region illumination while the second lens body handles near region illumination with glare reduction. This segmentation achieves superior light distribution control despite increased structural complexity.
Solution Approach 2:
Each lens body is designed with specific optical properties tailored to its function. The first lens body has optical characteristics for long-distance light projection, while the second lens body has characteristics for near-region light projection with reduced intensity. This local quality optimization enables effective light distribution 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
This design reduces glare in near regions while enhancing visibility of distant areas, allowing drivers to detect pedestrians or oncoming vehicles more promptly, thereby improving safety.
Implementation Method 1
a reflector disposed in a path of light from the light source; The reflector reflects first light toward the first lens body and reflects second light toward the second lens body
Implementation Method 2
The first lens body transmits and projects, to a first region, the first light reflected by the reflector. The second lens body transmits and projects, to a second region, the second light reflected by the reflector
Data Source
AI summary
A headlamp that projects light forward includes: a low beam light source module; a reflector disposed in a path of light from the low beam light source module; and a first lens body and second lens body disposed farther forward than the low beam light source module and the reflector. The reflector reflects first light and second light, which are portions of the light from the low beam light source module, toward the first lens body and the second lens body, respectively. The first lens body transmits and projects, to a first region, the first light reflected by the reflector. The second lens body transmits and projects, to a second region larger than the first region and including a region closer to the headlamp than the first region, the second light reflected by the reflector. The first light is higher in luminous intensity than the second light.