Imaging Sensor Frame-Rate Switching for Low-Power Motion Detection
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Solution Overview
Problem
Current imaging devices require significant power consumption for continuous operation and lack integrated intelligence for tasks like image processing and motion detection, making them inefficient and unreliable.
Innovation Solution
An imaging device with a pixel structure incorporating a photoelectric conversion device, transistors, and capacitors that enables motion detection and image processing functions, using metal oxide transistors for low power consumption and efficient data processing, and a method for switching between low-frame-rate and high-frame-rate operations based on detected events.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If continuous operation mode is used for motion detection and image processing, then detection capability and processing speed are improved, but power consumption increases significantly
Solution Approach 1:
The imaging device dynamically adjusts its operating frame rate based on detected events. When motion is detected, the device switches to a higher frame rate to improve detection capability and processing speed. When no motion is detected, it reduces to a lower frame rate to minimize power consumption. This dynamic adaptation resolves the contradiction between maintaining high productivity and reducing energy usage.
Solution Approach 2:
The device changes the operating parameter (frame rate) based on operational conditions. By monitoring for events and adjusting the frame rate parameter accordingly, the system optimizes the balance between detection performance and power consumption, achieving high detection capability only when necessary while conserving energy during normal operation.
2Measurement precision
If high frame rate operation is used continuously, then image processing speed and event detection accuracy are improved, but power consumption increases
Solution Approach 1:
The imaging device employs periodic action by operating at different frame rates depending on the operational phase. During normal surveillance, it uses a lower frame rate to conserve energy. When an event is detected, it temporarily switches to a higher frame rate to improve detection accuracy and capture detailed information, then returns to the lower frame rate afterward.
3Extent of automation
If multiple processing circuits are integrated in the imaging device, then image processing capability and intelligence are improved, but device complexity increases
Solution Approach 1:
The patent merges multiple processing functions into a single integrated imaging device. By combining the pixel array, motion detection circuits, and image processing circuits into one unified device, it achieves high automation and intelligence without proportionally increasing overall device complexity. The merged architecture allows efficient coordination between different processing functions.
Solution Approach 2:
The imaging device incorporates multi-functionality by integrating multiple circuits that can perform different operations. The same device structure supports both motion detection and full image processing functions, allowing it to adapt to different operational requirements without requiring separate dedicated hardware for each function, thus managing complexity while enhancing capability.
4Productivity
If motion detection function is added to the imaging device, then surveillance efficiency is improved, but power consumption during normal operation increases
Solution Approach 1:
The device applies partial action by activating the full image processing function only when motion is detected. During normal surveillance periods, it uses a reduced processing mode that consumes less power. This partial operation approach maintains surveillance efficiency through the motion detection function while avoiding the excessive power consumption that would result from continuous full-power operation.
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 device achieves reduced power consumption, enhanced reliability, and improved performance by integrating motion detection and image processing capabilities, allowing for efficient data handling and intelligent operation modes.
Implementation Method 1
a pixel, a first circuit, and a second circuit, the first circuit has a function of supplying a first potential to the pixel
Data Source
AI summary
An imaging device having a motion detecting function and an image processing function is provided. The imaging device can detect a difference between a reference frame image and a comparative frame image, and can switch from a motion detecting mode to a normal image capturing mode when a significant difference is detected. A low-frame-rate operation in the motion detecting mode can reduce power consumption. Moreover, the imaging device has an image recognition function in combination with the motion detecting function, so that switching from the motion detecting mode to the normal image capturing mode can be performed when a particular image is recognized.