Electronic Camera Light Emission Control for Exposure Accuracy
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Solution Overview
Problem
Conventional electronic cameras using strobe light face issues with underexposure due to errors in guide number calculation, leading to increased shooting intervals and lost opportunities, as they rely on complete capacitor charging before allowing another shot.
Innovation Solution
An electronic camera with a light-emitting unit that can adjust color components and spectral distribution characteristics, using a color-component determining unit and light-emitting control unit to optimize light emission based on measured color components and temperature, allowing for continuous shooting with corrected luminescent color and spectral characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the capacitor is charged completely before allowing another shot, then the light emission is reliable, but the shooting interval increases and shooting opportunities are lost
Solution Approach 1:
The system performs preliminary actions by measuring color components during the capacitor charging process and determining appropriate light emission parameters before the next shooting opportunity. This allows the camera to prepare for optimal light emission without waiting for complete capacitor charging, thus maintaining reliability while increasing shooting speed.
Solution Approach 2:
The patent implements dynamic adjustment of light emission parameters based on real-time capacitor charge state and measured color components. The light emission control unit dynamically adjusts emission characteristics to match the actual lighting conditions, enabling reliable photography at any charging stage without compromising image quality.
2Ease of operation
If the guide number is automatically set assuming complete capacitor charging, then the aperture value determination is simplified, but errors in guide number calculation cause underexposure
Solution Approach 1:
The system incorporates feedback mechanisms where the color component measurement unit continuously monitors lighting conditions and provides feedback to the control unit. This feedback loop allows real-time adjustment of exposure parameters based on actual light characteristics, eliminating guide number calculation errors and preventing underexposure while maintaining simple operation.
Solution Approach 2:
The patent changes the parameter determination approach by using actual measured color components and capacitor charge state to dynamically adjust light emission parameters and exposure settings. This replaces the static guide number calculation with adaptive parameter adjustment, improving measurement precision without complicating user operation.
3Device complexity
If the light-emitting unit emits light with fixed color components, then the device structure is simple, but the spectral distribution characteristic cannot be corrected
Solution Approach 1:
The light-emitting control unit dynamically adjusts the spectral distribution characteristics of the light emission based on measured color components and capacitor charge state. This dynamic control enables the system to correct spectral distribution without requiring complex physical structures, maintaining simplicity while achieving adaptability.
Solution Approach 2:
The system changes the emission parameters of the light-emitting unit by adjusting color temperature and spectral distribution characteristics based on real-time measurements. This parameter adjustment capability allows spectral correction without adding complex hardware, as the control unit modifies existing light emission characteristics through software-based parameter control.
Data Source
AI summary
An electronic camera comprises a light-emitting unit 38 for emitting light, color components of which can be changed; a color-component measuring unit 51 for obtaining color components involved in any one of light from a light source for illuminating an object and light reflected by the object; an input-image processing unit 52 for determining color components of light to be emitted based on the color components calculated by the color-component measuring unit; and a light-emitting member driving unit 39 for making the light-emitting unit emit light involving the color components determined by the input-image processing unit in response to an instruction of photographing given by a user.