Vehicle Lamp Light Distribution Pattern Adjustment
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Solution Overview
Problem
Two-wheeled vehicle headlamps experience insufficient light distribution and reduced far visibility when turning, as the light pattern tilts with the vehicle's body, leading to inadequate illumination on the side of the turning direction.
Innovation Solution
A vehicle lamp system that adjusts its light distribution pattern based on the vehicle's tilt, using a control unit to maintain the light pattern's orientation and prevent irradiation outside the normal position, even when the vehicle is tilted, employing a combination of light sources, optical members like Galvano mirrors, and sensors to detect the vehicle's tilt and adjust the light distribution accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the vehicle body is tilted during turning, then the vehicle can travel around a corner by tilting toward the turning direction, but the light distribution pattern becomes tilted and far visibility is reduced on the turning side
Solution Approach 1:
The patent employs dynamic adjustment of the light distribution pattern based on the vehicle's tilt angle. The control unit receives tilt angle information from a sensor and dynamically modifies the light distribution to compensate for the vehicle's倾斜状态, ensuring that the light pattern remains horizontally oriented regardless of vehicle orientation during turning maneuvers
Solution Approach 2:
The system changes the parameters of the light distribution pattern (irradiation direction, intensity distribution, cutoff line position) based on the detected vehicle tilt angle. By adjusting these parameters in real-time, the system maintains appropriate illumination characteristics even when the vehicle body is tilted during cornering
2Illumination intensity
If the light distribution pattern is adjusted to follow the vehicle tilt, then the light illuminates the turning direction area, but light is irradiated outside the normal light distribution region causing potential glare
Solution Approach 1:
The control unit receives feedback from a tilt angle sensor that detects the vehicle's倾斜状态 and uses this information to adjust the light distribution pattern. This closed-loop feedback mechanism ensures that the light pattern is modified appropriately to maintain horizontal orientation while preventing excessive light spread that could cause glare to other road users
Solution Approach 2:
The system modifies the light distribution parameters (irradiation angle, intensity profile, cutoff positions) based on the vehicle's tilt angle. By carefully controlling these parameters, the system directs light appropriately toward the turning direction while constraining the light pattern boundaries to prevent harmful glare to oncoming vehicles and pedestrians
3Illumination intensity
If a control unit adjusts the light distribution pattern, then the light orientation is maintained during vehicle tilt, but the device complexity increases
Solution Approach 1:
The patent replaces complex mechanical adjustment mechanisms with an electronic control system. Instead of physically repositioning optical components mechanically, the system uses electronic control of light-emitting elements (LEDs or laser diodes) and electronic shutters to adjust the light distribution pattern, thereby reducing mechanical complexity while achieving the desired light orientation maintenance during vehicle tilt
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
Ensures appropriate light distribution and improved safety by maintaining the light pattern's orientation and preventing glare to oncoming vehicles, even when the vehicle is tilted during turns.
Implementation Method 1
an optical member configured to form a predetermined light distribution pattern by irradiating light, which is to be emitted from the light source, toward a region ahead of the lamp
Implementation Method 2
the control unit may be configured to adjust the predetermined light distribution pattern by controlling a scanning direction of the light with at least one of the rotary reflector, a Galvano mirror, a MEMS mirror, and a polygon mirror
Data Source
AI summary
This vehicular lighting equipment provided on a vehicle (100), which is capable of travelling around a corner by tilting the vehicle body toward the turning direction, comprises a light source, an optical member by which the light emitted from the light source is directed forward from the lighting equipment to form a predetermined light distribution pattern (PL), and a control unit for adjusting the predetermined light distribution pattern (PL) according to the tilted state of the vehicle body. The control unit is configured to adjust a predetermined light distribution pattern (PL2) such that in a light distribution pattern (PL1) corresponding to when the vehicle body is tilted, no light is irradiated in a region located outside the light distribution pattern (PL) corresponding to when the vehicle body is in the vertical state.