Vehicle Headlamp Beam Circuit Layout for Emax and Power Control
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Solution Overview
Problem
Existing vehicle lamp systems fail to meet regulatory requirements for high beam light patterns due to shifting of the E max value, resulting in inadequate brightness at the intersection point between the H-H and V-V axes, and excessive power consumption when both high and low beams are activated.
Innovation Solution
A vehicle high beam and low beam control system and method that includes a signal receiving module, light source module, and control module to selectively switch on and off low-beam and high-beam circuits based on an indication signal, ensuring the high beam light pattern meets brightness requirements at the H-H and V-V axis intersection while reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If both high beam light source and low beam light source are turned on when high beam is activated, then illumination coverage is improved, but power consumption becomes excessively high
Solution Approach 1:
The low beam light source is divided into main low-beam light sources and auxiliary low-beam light sources. When high beam is activated, only the auxiliary low-beam light sources remain on while the main low-beam light sources are turned off, achieving selective illumination to reduce power consumption while maintaining necessary coverage
Solution Approach 2:
Instead of turning off all low beam light sources when high beam is activated, the system keeps the auxiliary low-beam light sources on to provide partial illumination coverage, balancing power reduction with maintaining adequate lighting coverage
2Illumination intensity
If low beam light pattern and high beam light pattern are superimposed, then illumination coverage is improved, but the E max value shifts and brightness at intersection point becomes insufficient
Solution Approach 1:
The low beam light source is segmented into main and auxiliary components with different functional roles. The auxiliary low-beam light sources are positioned and configured to provide illumination without interfering with the high beam's E max value positioning, thus preventing light pattern superimposition issues
Solution Approach 2:
Different regions of the light source are assigned different functions: main low-beam light sources provide central illumination while auxiliary low-beam light sources provide peripheral illumination. This local differentiation allows the high beam to maintain its E max value at the intersection point without being shifted by low beam superimposition
3Device complexity
If technicians test low beam and high beam separately, then inspection process is simplified, but the interaction effect between beams is ignored leading to non-compliance
Solution Approach 1:
The patent establishes preliminary design requirements for the auxiliary low-beam light sources, specifying their positioning and illumination characteristics before assembly. This preliminary configuration ensures that when high beam is activated, the auxiliary sources provide illumination without causing E max value shifting, thus ensuring compliance without complex post-assembly adjustments
Data Source
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AI summary
Disclosed are a vehicle high beam and low beam control system and control method, and a vehicle. The control system comprises a signal receiving module, a light source module, and a control module, the signal receiving module is configured to receive an indication signal for enabling or disabling a high/low beam function, and the control module is connected to the signal receiving module, so as to execute, on the basis of the indication signal, an operation of enabling or disabling the high/low beam function: the light source module comprises a low-beam circuit and a high-beam circuit, and the low-beam circuit comprises a main low-beam circuit and an auxiliary low-beam circuit; the control module is separately connected to the low-beam circuit and the high-beam circuit, and when the indication signal received by the signal receiving module is to enable the high-beam function, the control module controls the high-beam circuit and at least one low-beam circuit to be switched on, and controls at least one main low-beam circuit to be disconnected. The control system can reduce the offset of the Emax value of a high-beam pattern. is more conducive to meeting the requirement that the brightness of the HV point of the high-beam pattern is greater than 80% of the Emax value. and can also reduce the high-beam power.