Camera Aperture Timing for Stable Frame Exposure
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Solution Overview
Problem
Conventional mobile phone cameras with fixed apertures limit the user's photographing and video recording experience due to the inability to adjust the aperture size dynamically, affecting image quality and exposure.
Innovation Solution
Adjust the aperture parameter based on the end of frame delimiter (EOF) of an image frame to synchronize it with the exposure parameter, ensuring accurate matching and minimizing the impact of aperture adjustments on image exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If aperture parameter is adjusted dynamically to improve photographing experience, then adaptability is improved, but image frame exposure may be affected
Solution Approach 1:
The patent applies preliminary action by delivering the exposure parameter to the camera sensor at the SOF moment before the aperture parameter takes effect at the EOF moment. This ensures that when the aperture changes, the exposure parameter is already prepared and will be applied in the subsequent frame, preventing exposure disruption during the aperture transition.
Solution Approach 2:
The patent implements dynamics by enabling dynamic adjustment of the aperture parameter while maintaining proper exposure through coordinated timing. The aperture can change at EOF while the exposure parameter is delivered at SOF, allowing both parameters to be adjusted dynamically without compromising image quality or exposure stability.
2Ease of operation
If aperture parameter is adjusted at any moment, then ease of operation is improved, but manufacturing precision of exposure timing deteriorates
Solution Approach 1:
The patent applies periodic action by synchronizing aperture parameter adjustments with the frame delimiter timing (SOF and EOF). The aperture parameter is adjusted at EOF of one frame and takes effect at SOF of the next frame, creating a regular periodic cycle that ensures precise timing synchronization while maintaining ease of operation.
Solution Approach 2:
The patent implements feedback by using the EOF signal as a trigger for aperture parameter adjustment. The system monitors the frame delimiter timing and automatically coordinates the aperture parameter delivery with the exposure parameter, ensuring precise timing synchronization without requiring manual intervention.
3Productivity
If exposure parameter is delivered immediately to synchronize with aperture, then productivity is improved, but image frame quality deteriorates due to exposure disruption
Solution Approach 1:
The patent applies preliminary action by delivering the exposure parameter at the SOF moment, which is before the aperture parameter takes effect at the EOF moment. This advance delivery ensures that the exposure parameter is ready and will be applied in the subsequent frame, maintaining high productivity while preventing exposure disruption and preserving image frame quality.
Data Source
AI summary
In a photographing parameter setting method, an electronic device delivers an exposure parameter to hardware at a moment corresponding to an SOF of an Nth frame, so that the new exposure parameter starts to take effect in an (N+2)th frame. In addition, a new aperture parameter is enabled to start to take effect at a moment corresponding to an EOF of the Nth frame, thereby effectively reducing impact of aperture adjustment on the image frame.