Strobe Lighting Exposure Control via Real-Time Parameter Broadcast
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Solution Overview
Problem
Existing lighting systems for photography, including LEDs and studio lights, face challenges with varying light intensity and color temperature over time, requiring complex measurement and analysis to achieve proper exposure, which increases complexity and cost, and can result in inaccuracies due to imperfect measurements or modeling of lighting variations.
Innovation Solution
A system comprising a controller that adjusts light intensity and color temperature of a light source, generating data on these parameters, which is transmitted to a digital imaging device for processing to determine optimal exposure settings, allowing the user to select the best time to capture an image with desired exposure and color temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If continuous lighting is used to provide sufficient illumination, then available light is increased, but the lighting equipment becomes extremely hot and may cause fire hazards
Solution Approach 1:
The patent employs strobe lighting that emits light in periodic bursts rather than continuous illumination. The strobe unit discharges capacitive energy in controlled pulses synchronized with camera shutter speeds, providing sufficient light for exposure while allowing cooling periods between bursts. This periodic action maintains illumination intensity while eliminating continuous heat generation and fire hazards.
2Illumination intensity
If hot-lights are used to increase illumination, then available light is improved, but the color temperature becomes too warm to mix with daylight
Solution Approach 1:
The patent uses strobe lighting with daylight-balanced color temperature (approximately 5500K) that matches natural daylight. By controlling the spectral characteristics and color temperature of the strobe output, the system allows seamless mixing with ambient daylight without creating color casts. This parameter control enables flexible lighting conditions while maintaining color accuracy across different lighting scenarios.
3Object-affected harmful factors
If cool-lights are used instead of hot-lights, then fire hazard is reduced, but sufficient light output for photographing people is not achieved
Solution Approach 1:
The system pre-charges capacitive energy storage elements before each light burst, accumulating sufficient energy to produce high-intensity illumination in each strobe discharge. This preliminary energy accumulation allows the cool-lit strobe to deliver light output comparable to hot-lights during the brief exposure period, achieving sufficient illumination without the continuous heat generation that creates fire hazards.
4Measurement precision
If complex measurement and analysis systems are implemented to handle varying light parameters, then exposure accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The patent incorporates light meters and colorimeters that continuously monitor lighting parameters and provide real-time feedback to the control system. This feedback enables automatic adjustment of shutter speed, aperture, and strobe power to maintain optimal exposure. The system also includes pre-computed exposure tables stored in memory that simplify the control logic, reducing device complexity while maintaining high exposure accuracy through automated parameter adjustment based on measured lighting conditions.
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 enables precise control over light exposure, reducing inaccuracies and complexity by providing real-time data for adjusting light settings, ensuring high-quality images with accurate color temperature and intensity, thus improving the quality of captured photographs.
Implementation Method 1
Due to recent advances in light-emitting diode (LED) technologies, LEDs lighting systems are an emerging lighting source that is well suited for studio lighting use
Implementation Method 2
a receiver for receiving a signal from the light source comprising the light source data
Data Source
AI summary
A system for photographic exposure via real-time broadcast of lighting parameters. The system includes a light source that emits light at different color temperatures and intensities controlled by a controller. The controller generates light source data that is transmitted to a digital imaging device. The digital imaging device includes a receiver for receiving the signal from the light source and a processor processing the light source data for determining color temperature, intensity, and timing of light emitted by the light source for generating exposure data. The exposure data determines when to commence capturing an image of a desired exposure and color temperature for achieving a desired exposure. The digital imaging device includes a display for displaying the exposure data to a user for allowing the user to select when to actuate the shutter release for capturing the image with the desired color temperature and exposure.