Camera Fill Light Control for Exposure Definition Resolution
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Solution Overview
Problem
Photographic apparatuses face issues with inconsistent image quality due to fixed light intensity in fill-in light structures, leading to overexposure or underexposure, which affects the definition resolution of captured images.
Innovation Solution
A photographic apparatus with an image sensor, processing unit, and control unit that calculates exposure values and selects between continuous and pulse modes to drive a light emitting unit, adjusting light intensity accordingly to match the exposure sequence and ensure proper image capture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed mode is used to drive the fill-in light structure to emit a fixed light intensity, then the structure is simple to control, but the image may be overexposed or underexposed resulting in worse definition resolution
Solution Approach 1:
The patent applies dynamics by transitioning from a fixed control mode to a dynamic control mode where the light intensity is automatically adjusted based on real-time environmental light conditions. The control unit receives light intensity information from the detection unit and dynamically modifies the drive current to the light emitting unit, ensuring optimal exposure while maintaining simple overall system control.
Solution Approach 2:
The patent implements feedback by introducing a detection unit that continuously monitors environmental light intensity and feeds this information back to the control unit. The control unit then adjusts the light emitting unit's output accordingly, creating a closed-loop system that prevents overexposure and underexposure while maintaining automatic adaptation to changing light conditions.
2Manufacturing precision
If the photographic apparatus automatically adjusts drive modes and light intensity according to light changes, then image definition resolution is improved, but the device complexity increases
Solution Approach 1:
The patent applies universality by designing a control unit that performs multiple functions: it processes exposure parameters, receives light intensity information from the detection unit, determines appropriate drive modes, and controls the light emitting unit. This multi-functional approach integrates several subsystems into a single control unit, reducing overall device complexity while maintaining automatic light adjustment capabilities.
Solution Approach 2:
The patent implements self-service by enabling the photographic apparatus to automatically detect environmental light conditions and adjust its own light emitting unit without external intervention. The detection unit and control unit work together to autonomously determine the appropriate drive mode and light intensity, eliminating the need for manual adjustment mechanisms and reducing system complexity.
3Stability of the object's composition
If a continuous mode is used to drive the light emitting unit to emit light continuously, then the light filling is smooth, but the energy consumption increases
Solution Approach 1:
The patent applies periodic action by implementing pulse mode operation where the light emitting unit emits light in periodic pulses rather than continuously. The control unit generates pulse signals with appropriate width and frequency based on exposure requirements, achieving necessary light filling while allowing energy-saving intervals between pulses, thus reducing overall energy consumption while maintaining stable light emission during active periods.
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting the drive current parameters (current magnitude, pulse width, frequency) based on environmental light conditions and exposure requirements. The control unit modifies these electrical parameters to optimize the balance between light emission stability and energy consumption, switching between continuous and pulse modes as needed.
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
This solution allows for automatic adjustment of light emission modes based on exposure values, enhancing image clarity by preventing overexposure or underexposure, thereby improving image definition resolution without requiring complex phase detection circuits.
Implementation Method 1
a light emitting unit (130), and a control unit (140). According to the exposure value generated by the processing unit (120), the control unit (140) is configured to select a continuous mode to drive the light emitting unit (130) to emit light continuously, or a pulse mode to cooperate with the exposure signal to drive the light emitting unit (130) to pulse light
Data Source
AI summary
A photographic apparatus includes an image sensor, a processing unit, a light emitting unit, and a control unit. The image sensor is configured to capture a continuous image, and generate an exposure signal according to an exposure sequence corresponding to the continuous image. The processing unit is electrically connected to the image sensor and is configured to calculate an exposure value according to the continuous image. The control unit is electrically connected to the image sensor, the processing unit, and the light emitting unit. According to the exposure value, the control unit may select a continuous mode to drive the light emitting unit to emit light continuously, or a pulse mode to cooperate with the exposure signal to drive the light emitting unit to pulse light, in order to fill light while capturing the continuous image.