Vehicle Headlight Movable Shade for Pedestrian Alerting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional vehicle headlight systems struggle to accurately project alerting light patterns towards pedestrians at large angles relative to the vehicle's moving direction, especially on curved roads, due to separation from the high beam and low beam units, and fail to prevent glare to oncoming vehicles.
Innovation Solution
The vehicle headlight system incorporates a high beam module with a second reflector, a movable shade, and a swivel structure, controlled by a system controller to adjust light distribution patterns and prevent glare, using a combination of high beam and low beam lighting to ensure safe nighttime driving and accurate pedestrian alerting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the alerting light-emitting apparatus is separated from the headlight including high beam and low beam, then the alerting function can be independently controlled, but it becomes very difficult to accurately project the alerting light pattern toward pedestrians located at large angles relative to the vehicle's moving direction
Solution Approach 1:
The patent combines the separated alerting light-emitting apparatus back into the headlight assembly, integrating the high beam module with the headlight unit. This merging allows the system to maintain independent control capability while restoring accurate light projection toward pedestrians at large angles, as the integrated structure shares the same optical axis and mounting position as the headlight.
2Illumination intensity
If the conventional alerting light-emitting apparatus projects light in a spot-light shape, then the light can be concentrated on a specific point, but it becomes very difficult to accurately project the alerting light pattern toward pedestrians on curved roads or at large angles
Solution Approach 1:
The patent introduces a movable shade that can dynamically adjust its position and shape to control the light distribution pattern. This dynamic mechanism allows the system to maintain concentrated light intensity while adapting the projection pattern to various scenarios, including pedestrians on curved roads or at large angles, by adjusting the shade's position to redirect or spread the light as needed.
3Device complexity
If the high beam module uses a fixed light distribution pattern, then the structure can be simplified, but it cannot provide favorable light distribution for both pedestrian alerting and preventing glare to oncoming vehicles
Solution Approach 1:
The patent employs a movable shade that can be positioned at different locations to create different light distribution patterns. When alerting pedestrians, the shade is positioned to allow light to project forward at various angles. When preventing glare to oncoming vehicles, the shade is adjusted to block or redirect light upward or sideways. This dynamic adjustment maintains structural simplicity while achieving versatile light distribution.
4Illumination intensity
If the lamp unit emits high intensity light for pedestrian alerting, then the marking light visibility is improved, but it may cause glare to oncoming vehicles on the oncoming traffic lane
Solution Approach 1:
The patent uses a movable shade to create local quality variations in the light distribution. The shade selectively blocks light in specific directions (such as toward oncoming vehicles) while allowing light to pass through in other directions (toward pedestrians). This localized control of light quality enables high intensity marking light for pedestrian alerting without causing glare to oncoming vehicles, as the shade redirects the light away from sensitive areas.
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 favorable light distribution patterns for pedestrian alerting and safe nighttime driving by adjusting light emission based on pedestrian distance and vehicle speed, preventing glare to oncoming vehicles and ensuring accurate marking light projection.
Implementation Method 1
a projector lens having an optical axis, an incident surface and a first focus located on the optical axis of the projector lens
Implementation Method 2
a reflector included in the high beam module, formed in a substantially reflective elliptical surface having a first focus and a second focus
Implementation Method 3
a movable shade extending at a right angle with respect to the optical axis of the projector lens
Data Source
Figure 1
Figure 2a~3c
Figure 3a~3b
AI summary
A vehicle headlight system (1) can include a headlight controller (2) and a lamp unit (20) incorporating a high beam module (22), which can emit favorable marking lights while the headlight controller (2) associates each of a shading driver (19) and a swivel structure (18) with a shading width setter (16) and a swivel setter (15), respectively. When a forward vehicle (31) does not exist in a forward direction, the headlight systems (1) can provide favorable light distribution patterns by overlapping the light distribution pattern projected from the high beam module (22) with each of light distribution patterns for a high and low beam. When the forward vehicle (31) exists, the headlight system can prevent the lamp unit from emitting a glare type light to the forward vehicle (31). Thus, the disclosed subject matter can provide vehicle headlight systems (1), which can emit favorable light patterns toward a pedestrian (P1,P2) as a marking light (MB1, MB2), and which can provide favorable light distribution patterns to drive at night.