Dynamic Readout Speed Control for Image Sensor Power and Distortion
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Solution Overview
Problem
Electronic devices with cameras face power consumption issues due to fast readout speeds, leading to unnecessary energy use, especially when capturing images in high illuminance or slow-moving subjects, resulting in distortion such as rolling shutter distortion and motion blur.
Innovation Solution
The device employs a dual readout speed mechanism, where images are acquired at a first speed without compression and at a faster second speed with compression, allowing the processor to adjust the readout speed based on image comparison, thereby optimizing power usage and reducing distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the readout speed of the electronic device is increased, then the distortion of the image is reduced, but the power consumption of the electronic device increases
Solution Approach 1:
The patent implements dynamic readout speed adjustment by switching between first and second readout speeds based on real-time image quality assessment. The system dynamically selects the appropriate readout speed to balance between minimizing image distortion and reducing power consumption, rather than using a fixed readout speed throughout operation.
Solution Approach 2:
The patent changes the readout speed parameter based on imaging conditions and image quality metrics. By monitoring image parameters such as sharpness, focus, and distortion levels, the system adjusts the readout speed parameter to optimize the balance between image quality and power consumption in different operating scenarios.
2Reliability
If the readout speed of the electronic device is increased, then the image quality is improved, but the power consumption of the electronic device increases unnecessarily
Solution Approach 1:
The patent employs a feedback mechanism where the processor continuously monitors image quality metrics and uses this feedback to determine whether to switch between different readout speeds. The system compares image parameters against threshold values and adjusts readout speed accordingly, avoiding unnecessary high-power consumption when high image quality is not required.
Solution Approach 2:
The patent applies partial readout speed enhancement by using high readout speed only when and where image quality degradation is detected, rather than maintaining high readout speed continuously. This selective application of excessive action (high readout speed) only when necessary reduces overall power consumption while maintaining image quality when needed.
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 approach prevents unnecessary power consumption and minimizes image distortion by dynamically adjusting the readout speed according to the imaging conditions, ensuring efficient energy use and improved image quality.
Implementation Method 1
the image sensor may accumulate electron hole pairs (EHP) when light is detected
Data Source
AI summary
An electronic device according to various embodiments of the present invention comprises a processor and an image sensor module electrically connected to the processor, wherein: the image sensor module comprises an image sensor and a control circuit, which is electrically connected to the image sensor and is connected to the processor by an interface; the control circuit is set so as not to compress at least one image acquired from the image sensor according to a first readout speed, but to transmit the same to the processor, and to compress at least one image acquired from the image sensor according to a second readout speed that is faster than the first readout speed and to transmit the same to the processor; and the processor can be set so as to acquire a first image set by using the image sensor according to a predetermined readout speed, compare at least two images included in the first image set, set, as either the first readout speed or the second readout speed, the readout speed corresponding to the image sensor on the basis of the result of the comparison of the at least two images included in the first image set, and acquire a second image set according to either the set first readout speed or second readout speed, by using the image sensor. Additional various embodiments are possible.