Camera Aperture Timing Control for Stable Frame Exposure
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Solution Overview
Problem
Conventional mobile phone cameras with fixed apertures limit the photography and video recording experience due to the inability to adjust the aperture size dynamically, affecting image quality and user satisfaction.
Innovation Solution
A method for adjusting aperture parameters based on the start and end of frame delimiters in image frames to synchronize exposure and aperture settings, minimizing the impact on image quality during transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a variable aperture camera module is used to dynamically adjust aperture size, then photographing and video recording experience is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic aperture adjustment by controlling the aperture component to change aperture size during photographing and video recording. The system dynamically switches between different aperture sizes based on scene requirements, transforming a static camera module into a dynamic one that adapts to varying lighting conditions and depth of field needs.
Solution Approach 2:
The patent changes the aperture parameter (aperture size) as a key physical parameter to control light admission and depth of field. By adjusting this parameter dynamically, the system achieves different photographing effects without changing the overall camera module structure, thus improving adaptability while controlling complexity.
2Adaptability or versatility
If aperture parameter is adjusted during frame exposure, then aperture adaptability is improved, but image frame exposure quality deteriorates
Solution Approach 1:
The patent delivers the exposure parameter to the camera sensor before the frame exposure begins (at the SOF moment). This preliminary action ensures that the sensor is ready to capture the frame with the correct exposure settings, avoiding any disruption to the exposure process.
Solution Approach 2:
The patent segments the parameter adjustment process into distinct time points: exposure parameter delivery at SOF (start of frame) and aperture parameter adjustment at EOF (end of frame). This segmentation ensures that exposure and aperture parameters are adjusted at appropriate moments, preventing interference between the two processes and maintaining image quality.
3Measurement precision
If exposure parameter is delivered at SOF and aperture parameter at EOF, then parameter matching precision is improved, but one frame must be discarded causing time loss
Solution Approach 1:
The exposure parameter is delivered to the camera sensor in advance at the SOF moment, before the actual exposure begins. This preliminary delivery ensures that the sensor has the correct exposure settings ready, allowing precise parameter matching without disrupting the exposure timeline.
Solution Approach 2:
The patent inverts the traditional sequence by delivering the exposure parameter first (at SOF) and then adjusting the aperture parameter (at EOF), rather than adjusting both simultaneously or in the reverse order. This inverted sequence optimizes parameter matching precision while minimizing the impact on frame rate.
Data Source
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AI summary
This application provides a photographing parameter setting method and an electronic device. In the method, an electronic device delivers an exposure parameter to hardware at 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 an EOF of the Nth frame, thereby effectively reducing impact of aperture adjustment on the image frame.