Light Head Reflective Sensor for Automatic Flashlight Brightness
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Solution Overview
Problem
Existing flashlights lack the ability to automatically adjust brightness levels based on the distance to obstacles, leading to power wastage and potential safety hazards due to high brightness levels, especially when obstructed.
Innovation Solution
A light head with a light sensor and control circuit board that adjusts brightness based on light intensity data from diffuse reflections, using a reflector with an imaging hole and reflective surface to direct light to the sensor, which communicates with the control circuit board to adjust the light source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the flashlight remains at high brightness level, then the illumination intensity is sufficient, but the power consumption increases significantly and temperature rises causing safety hazards
Solution Approach 1:
The patent implements a feedback mechanism where the light sensor continuously detects ambient light intensity and sends signals to the control circuit board. The control circuit board automatically adjusts the brightness level of the light source based on the detected light intensity, creating a closed-loop control system that optimizes power consumption while maintaining sufficient illumination.
Solution Approach 2:
The patent makes the brightness level dynamic rather than static. The light source brightness automatically adjusts based on real-time environmental conditions detected by the light sensor, allowing the system to adapt to changing lighting conditions and reduce power consumption when high brightness is not needed.
2Illumination intensity
If the flashlight remains at high brightness level, then the illumination intensity is sufficient, but the temperature rises causing safety hazards
Solution Approach 1:
The light sensor provides continuous feedback on ambient light conditions to the control circuit board, which automatically reduces brightness when ambient light is sufficient. This prevents unnecessary high-temperature operation and extends the flashlight's lifespan by avoiding excessive heat generation.
Solution Approach 2:
The patent changes the operating parameters of the light source dynamically. By adjusting the brightness level based on ambient light conditions, the system avoids maintaining high power and temperature states unnecessarily, thereby reducing thermal stress and extending component lifespan.
3Adaptability or versatility
If multiple brightness levels are equipped, then the adaptability to different scenarios is improved, but the device complexity increases
Solution Approach 1:
The patent enables the flashlight to serve itself by automatically detecting ambient light conditions and adjusting its own brightness level. The light sensor and control circuit board work together to autonomously optimize performance without requiring user intervention, simplifying the user experience while maintaining adaptability.
Solution Approach 2:
The patent integrates multiple functions into a unified system. The light sensor serves both as a detection device and a control input, while the control circuit board handles both sensing processing and light source control. This multi-functional integration reduces overall system complexity despite providing adaptive brightness 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 effectively reduces power consumption and prevents safety hazards by dynamically adjusting brightness levels based on obstacle proximity, ensuring efficient use of power and preventing overheating.
Implementation Method 1
when a light emitted forward by the light source is blocked by an obstacle, the light produces diffuse reflection on the obstacle
Implementation Method 2
An inner wall of the imaging hole forms a reflective surface that directs light to the light sensor
Data Source
AI summary
The present invention relates to a light head with a light sensor, including a lamp holder, a reflector and a control circuit board. The reflector is installed inside a hollow structure, and is equipped with an installation port, a light-emitting port and an imaging hole. A light source is installed in the installation port and is electrically connected to the control circuit board. The imaging hole is equipped with a light sensor and an inner wall of the imaging hole forms a reflective surface. A diffusely reflected light enters through the imaging hole. A portion of the light is directly projected onto the light sensor, while another portion of the light is reflected off the reflective surface to the light sensor. The light sensor determines whether to adjust the brightness of the light source based on the light intensity.