LED Headlamp Eye Detection Safety Control
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Solution Overview
Problem
LED headlamps pose a risk of physical harm due to their high light transmission power, potentially causing damage to users and third parties, and existing solutions fail to effectively mitigate this issue.
Innovation Solution
A headlamp with a control unit that includes an image sensor to detect human faces and eyes, reducing LED light intensity when necessary, and an infrared sensor to adjust power levels, ensuring safe usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If LED power is increased to provide high brightness, then illumination intensity is improved, but risk of eye damage increases
Solution Approach 1:
The control unit continuously monitors the illuminated area before harmful effects occur. When a face or eye is detected in the dangerous area, the system proactively reduces LED power before eye damage can happen, rather than waiting for damage to occur.
Solution Approach 2:
The image sensor provides real-time feedback about the illuminated area to the control unit. This feedback loop allows the system to dynamically adjust LED power based on detected objects, maintaining safety while preserving illumination when safe.
2Object-affected harmful factors
If LED power is reduced to prevent eye damage, then safety is improved, but illumination intensity decreases
Solution Approach 1:
The system dynamically adjusts LED power based on real-time detection. When no face is detected, full power is maintained for maximum illumination. When a face or eye is detected in the dangerous area, power is reduced to safe levels. This dynamic adjustment resolves the contradiction by adapting illumination to safety requirements.
Solution Approach 2:
The control unit changes the power parameter of the LEDs based on detection results. The system maintains high illumination intensity when safe by operating at full power, and transitions to safety mode by reducing power when eyes are detected, thus adapting the illumination parameter to safety conditions.
3Object-affected harmful factors
If image sensor processing is added to detect faces and eyes, then safety control is improved, but device complexity increases
Solution Approach 1:
The control unit performs multiple functions: it controls LED power, processes image sensor data, detects faces and eyes, and manages safety logic. By making the control unit multi-functional, the patent avoids adding separate dedicated components for each function, thereby limiting the increase in device complexity while achieving comprehensive safety 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
The solution significantly enhances the safe use of LED headlamps by automatically reducing light intensity when a human face or eye is detected, preventing damage and extending battery life.
Implementation Method 1
an image sensor generating images of the area illuminated by the lamp
Implementation Method 2
an infrared sensor operating within a spectrum that is distinct from that of the light spectrum of the LEDs
Data Source
AI summary
Lamp comprisingone or more LEDs:A controllable power unit providing power supply to the LED lamps,A control unit for adjusting the light generated by the lamp,wherein said control unit includes an image sensor generating images of the illuminated area of the lamp, and a processor for processing the images to detect the presence of an eye in a presumably dangerous area, said control unit generating a control signal for reducing the amount of light generated by the LED during the detection of a human face, in particular of an eye in said presumably dangerous area.