Headlamp Light-Sensing Layout to Reduce Optical Crosstalk
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Solution Overview
Problem
Current headlamps have complex structures due to separate arrangement of lenses and suffer from optical crosstalk, making assembly difficult and affecting light-sensing accuracy.
Innovation Solution
A compact and integrated headlamp design with a housing, lens hood, and PCB arrangement that aligns light holes and a light-sensing element, using a condensing lens to receive ambient light and adjust brightness intelligently, while reducing optical crosstalk through a lens hood shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a lens for collecting reflected light is arranged independent of a main lens, then the light-sensing function can be achieved, but the headlamp becomes complex in structure and difficult to assemble
Solution Approach 1:
The patent merges the light-collecting lens and the main projection lens into a single integrated lens structure. The lens includes a light-collecting portion with a light-sensing element and a main projection portion, allowing both light sensing and projection functions to be achieved through one unified component, thereby simplifying the overall structure and easing assembly while maintaining reliable light-sensing functionality
2Reliability
If the main lens and the lens for collecting light are separately arranged, then the light-sensing function is achieved, but the headlamp structure becomes complex
Solution Approach 1:
The patent integrates the light-collecting lens and main projection lens into a single molded lens structure with distinct functional portions. This merging eliminates the need for separate assembly of multiple lens components, significantly improving ease of manufacture and assembly while maintaining the light-sensing function through the integrated light-collecting portion with embedded light-sensing element
3Device complexity
If a lens for collecting light is integrated with a main lens, then the structure is simplified, but optical crosstalk occurs
Solution Approach 1:
The patent applies local quality differentiation within the integrated lens by providing distinct refractive index regions: the light-collecting portion has a first refractive index while the main projection portion has a second refractive index different from the first. This local optical property differentiation enables the integrated lens to perform both light collection for sensing and light projection functions while preventing optical crosstalk between the two functional paths
4Adaptability or versatility
If automatic brightness adjustment is implemented, then the adaptability to different scenes is improved, but the device complexity increases
Solution Approach 1:
The patent implements a self-service automatic brightness adjustment system where the light-sensing element embedded in the integrated lens automatically detects ambient light conditions and triggers brightness adjustment of the light source without requiring external control systems. The light-sensing element directly controls the brightness based on detected light intensity, enabling the headlamp to adapt to different scenes while minimizing control system complexity
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 design allows for intelligent brightness adjustment, improves assembly ease, enhances waterproofing, and extends headlamp life by reducing high-brightness usage, while ensuring accurate light sensing.
Implementation Method 1
The condensing lens is arranged in front of the light-sensing element, and is configured to converge external light to the light-sensing element
Implementation Method 2
The light-sensing element is configured to provide, according to the brightness of sensed light, a corresponding signal for controlling the increasing and reducing of light-emitting brightness
Data Source
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AI summary
A headlamp light-sensing detection device and a headlamp are provided. The headlamp light-sensing detection device includes a condensing lens, a lens hood and a light-sensing element. The condensing lens is arranged in front of the light-sensing element, to converge external light to the light-sensing element. The lens hood is arranged between the light-sensing element and the condensing lens, and may be configured to shield the light which is projected to the light-sensing element by a high beam light source and a low beam light source, so as to reduce optical crosstalk, such that external ambient light is received accurately, thereby achieving a desirable light-sensing detection effect. The light-sensing element may provide photoelectric parameters according to the brightness of sensed light, and then an MCU chip collects the photoelectric parameters and provides a corresponding control signal.