Camera Flash Synchronization via Wireless Timing Data
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Solution Overview
Problem
In systems where an image capturing apparatus and a light emitting apparatus communicate via wireless communication at predetermined intervals, synchronization between exposure and light emission can be disrupted, leading to potential misalignment between the camera's exposure and the flash's light emission.
Innovation Solution
The image capturing apparatus includes a wireless communication unit and a deciding unit that calculates the remaining time before exposure and determines a period for wireless communication, transmitting this information to the light emitting apparatus to ensure synchronized light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless communication is performed at predetermined intervals between the image capturing apparatus and light emitting apparatus, then power consumption is reduced and communication simplicity is maintained, but synchronization between exposure timing and light emission timing cannot be guaranteed
Solution Approach 1:
The image capturing apparatus transmits light emission information to the light emitting apparatus in advance before exposure occurs. This preliminary transmission allows the light emitting apparatus to prepare for light emission ahead of time, ensuring that the actual light emission timing aligns precisely with the exposure timing even though wireless communication occurs at predetermined intervals. The key is transmitting the timing information early enough so that the light emitting apparatus can synchronize its emission with the upcoming exposure.
2Device complexity
If wireless communication is used to transmit light emission information, then device complexity is reduced compared to wired connections, but real-time transmission of synchronization information cannot be ensured
Solution Approach 1:
The system incorporates feedback mechanisms where the image capturing apparatus transmits light emission information containing timing data to the light emitting apparatus, and the light emitting apparatus acknowledges receipt and confirms its emission timing. This feedback loop ensures that even with wireless communication at predetermined intervals, the synchronization accuracy is maintained through continuous verification and adjustment of timing information between the two devices.
Data Source
AI summary
An image capturing apparatus that controls a light emitting apparatus, comprises a wireless communication unit that performs communication with the light emitting apparatus at predetermined intervals, a deciding unit that, upon receiving an instruction to cause the light emitting apparatus to emit light to perform shooting, obtains a remaining time before the image capturing apparatus performs exposure, and decides information regarding a period of time remaining before the light emitting apparatus emits light, based on the remaining time to exposure and a period of time from when the remaining time starts decreasing, to when the wireless communication unit performs a first wireless communication thereafter, and a control unit that performs control so that the decided information regarding the period of time is transmitted to the light emitting apparatus through the first wireless communication with the light emitting apparatus.