Strobe Device Dual LED Color Temperature Control
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Solution Overview
Problem
Conventional strobe devices struggle to maintain visibility of assist continuous light during both still image and video shooting, as adjusting color temperature to match ambient light often results in either reddish images or dazzling effects, due to the lack of differentiation in color temperature between modeling and video lights.
Innovation Solution
A strobe device utilizing first and second LEDs with different color temperatures, controlled by a processor to adjust light amount ratios based on the shooting mode and ambient light conditions, ensuring the assist continuous light is optimized for either still image pre-check or video shooting, thereby enhancing visibility and reducing dazzling effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the color temperature is adjusted to match the ambient light for video light, then the video light becomes less conspicuous, but the modeling light loses color temperature differentiation and becomes difficult to distinguish
Solution Approach 1:
The patent implements dynamic color temperature adjustment by switching between warm white LED (3000K) and cool white LED (6504K) based on the operating mode. The control unit dynamically selects which LED to activate - warm white for modeling light mode to provide visible contrast, and cool white for video light mode to match ambient lighting and reduce dazzling effects.
Solution Approach 2:
The patent applies different color temperature characteristics to different functional sections (modeling light vs. video light) using separate LED units. The warm white LED specifically serves the modeling light function while the cool white LED serves the video light function, allowing each section to have optimized local quality appropriate to its purpose.
2Loss of information
If the color temperature is adjusted to 3000K for modeling light, then the lighting conditions are easily visible, but the video light appears reddish and unsuitable for video shooting
Solution Approach 1:
The patent divides the lighting system into separate functional segments - a warm white LED (3000K) dedicated to modeling light and a cool white LED (6504K) dedicated to video light. This segmentation allows each LED to operate at its optimal color temperature for its specific function without compromising the other function's performance.
3Device complexity
If a single LED is used for both modeling and video light, then the device structure is simplified, but the color temperature cannot be differentiated between the two lighting modes
Solution Approach 1:
The strobe device achieves multi-functionality by incorporating both warm white and cool white LEDs that can be selectively activated based on the operating mode. The same physical device structure supports both modeling light and video light functions with appropriate color temperatures, making the device adaptable to different lighting requirements without requiring separate devices.
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 increases the visibility of assist continuous light, making it easier to perform pre-shooting checks and adjusts color temperature dynamically to match the shooting mode, preventing dazzling and ensuring optimal lighting conditions for both still and video applications.
Implementation Method 1
a first LED 208 that emits light having a color temperature of about 3000K
Implementation Method 2
a second LED 209 that emits light having a color temperature of about 6504K
Data Source
AI summary
A strobe device for use with an external camera. Assist continuous light is emitted using first and second LEDs different in color temperature. The color temperature of the assist continuous light is adjusted by either lighting one of the first and second LEDs or simultaneously lighting both at an adjusted light amount ratio. When in a still image pre-check mode, it is determined whether not a color temperature of an ambient light is higher than a threshold value. If the color temperature is higher than the threshold value, the light amount ratio is adjusted such that the light amount of the first LED is larger than that of the second LED, whereas if not, the light amount ratio is adjusted such that the light amount of the second LED is larger than that of the first LED.