Adjustable Reflector Fill Light for Camera Overexposure Control
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Solution Overview
Problem
Existing photographing modules face issues with overexposure due to fill light reflection and insufficient or uneven ambient light distribution, leading to loss of image details.
Innovation Solution
A light source angle-adjustment device with a light-emitting member, reflecting member, and driving member that adjusts the emission angle to prevent fill light from intensely entering the camera lens by rotating the reflecting member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the fill light device emits light along the photographing direction to provide sufficient ambient light, then the illumination intensity is improved, but overexposure occurs due to light reflection entering the camera lens
Solution Approach 1:
The reflecting member is made rotatable around an axis to dynamically adjust the light emission angle. The driving member enables the reflecting member to rotate between different angles, allowing the system to adapt between providing sufficient fill light and preventing overexposure by controlling the direction of reflected light away from the camera lens.
Solution Approach 2:
The emission angle of the light source is changed as a controllable parameter. By adjusting the angle between the light path and the reflecting surface through rotation, the system optimizes the balance between illumination intensity and prevention of harmful reflections, transforming a fixed parameter into an adjustable one.
2Illumination intensity
If the fill light device provides sufficient ambient light, then the light distribution is improved, but reflection from environment causes loss of image details
Solution Approach 1:
The system uses the camera lens as a detection means to monitor reflected light. When reflection is detected that would cause overexposure and loss of image details, the driving member adjusts the reflecting member's angle to redirect the light, creating a feedback loop that prevents information loss while maintaining adequate illumination.
3Illumination intensity
If the light-emitting member emits light directly to fill dark portions, then the filling effect is improved, but the light path causes intense reflection back to the camera lens
Solution Approach 1:
The reflecting member serves as an intermediary between the light-emitting member and the environment. It redirects the fill light at controlled angles to illuminate dark portions while preventing intense reflections from returning to the camera lens, mediating between the light source and the photographed scene.
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
Prevents overexposure and ensures even light distribution by adjusting the light path to avoid fill light reflection, effectively filling in insufficient ambient conditions.
Implementation Method 1
The reflecting member has a reflecting surface. The reflecting surface reflects the light emitted by the light-emitting member.
Data Source
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AI summary
A light source angle-adjustment device (10) is adapted to be disposed adjacent to a camera lens (20) and includes a light-emitting member (12), a reflecting member (13), and a driving member (14). The light-emitting member (12) has a light outlet (121). A light of the light-emitting member (12) is emitted from the light outlet (121) along a light path (R). The light outlet (121) faces away from the camera lens (20) and faces the reflecting member (13). The reflecting member (13) is disposed in the light path (R) of the light-emitting member (12). The reflecting member (13) has a reflecting surface (131) reflecting the light emitted by the light-emitting member (12). The driving member (14) is connected to the reflecting member (13) and drives the reflecting member (13) to rotate around an axis (A2) to change an angle provided between the light path (R) and the reflecting surface (131).