Monitoring Device Sleep Mode Exposure Delay
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Solution Overview
Problem
Conventional monitoring devices face high power consumption issues due to the need for high power components like image sensors and DSPs, leading to delays in obtaining proper exposure parameters after waking up from sleep mode, resulting in inappropriate or insufficiently fast image recording.
Innovation Solution
A monitoring device with a first processing module that continuously updates lighting parameters and a second processing module with a sleep mode, which includes an exposure function control unit that calculates exposure parameters using the updated lighting parameters when awakened, allowing for immediate proper image capture without delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the monitoring device enters sleep mode to save power, then power consumption is reduced, but the device cannot obtain proper exposure parameters immediately after waking up
Solution Approach 1:
The first processing module continuously updates lighting parameters even when the second processing module is in sleep mode. This preliminary action ensures that when the device wakes up, the exposure function control unit can immediately calculate exposure parameters using the pre-updated lighting data, eliminating the delay that would otherwise occur after awakening.
Solution Approach 2:
The patent divides the processing functionality into two separate modules: a first processing module that continuously updates lighting parameters with low power consumption, and a second processing module that handles image capture and exposure calculation only when needed. This segmentation allows the system to maintain accurate lighting information while minimizing overall power consumption by keeping the high-power second processing module in sleep mode during idle periods.
2Measurement precision
If the monitoring device uses high power components for image capture, then image quality is improved, but power consumption increases
Solution Approach 1:
The second processing module operates in periodic intervals rather than continuously. It enters sleep mode during idle periods and activates only when image capture is needed or when triggered by events such as motion detection. This periodic operation allows the high-power components to function at full capacity when required for image quality while dramatically reducing average power consumption through extended idle periods.
Solution Approach 2:
The first processing module serves itself and the second processing module by continuously maintaining updated lighting parameters without requiring the second module to be active. This self-service capability allows the high-power second processing module to remain in sleep mode longer, reducing power consumption while ensuring that image quality can be maintained when the module does activate.
3Use of energy by stationary object
If the automatic exposure control module calculates exposure parameters after waking up, then power is saved during sleep mode, but image recording is insufficiently fast
Solution Approach 1:
The lighting parameters are updated in advance by the first processing module before the second processing module needs to wake up for image capture. This preliminary preparation of lighting data enables the exposure function control unit to immediately calculate exposure parameters upon awakening, eliminating the computational delay that would otherwise slow down image recording initiation.
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
Enables the monitoring device to capture images promptly and accurately without the delays caused by conventional exposure parameter calculation, reducing power consumption and improving image quality.
Implementation Method 1
a photosensitive element (20), wherein the photosensitive element (20) obtains a lighting parameter of a monitored environment
Data Source
AI summary
A monitoring device includes an image capturing module, a photosensitive element, a first processing module and a second processing module. The photosensitive element obtains a lighting parameter of a monitored environment. The first processing module is electrically connected to the photosensitive element, stores the lighting parameter, and continuously updates the lighting parameter. The second processing module is electrically connected to the image capturing module and the first processing module, and the second processing module has a sleep mode. The second processing module includes an exposure function control unit. When the second processing module is awakened and converted to a recording mode, the exposure function control unit receives the updated lighting parameter from the first processing module and calculates an exposure parameter according to the lighting parameter to control the image capturing module.