Dual-Clock Image Processing for Low-Power Standby Wakeup
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Solution Overview
Problem
Existing electronic devices with always-on display (AOD) face increased power consumption due to the need to detect user interactions and display content in standby states, and existing solutions for reducing power consumption in these devices are inadequate.
Innovation Solution
An image processing apparatus with a low power system using a low-frequency clock signal for standby mode and a high power system using a high-frequency clock signal for normal mode, along with specific functional components distribution, to manage power consumption efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If components are set to always-on state to detect user interactions and process image information, then the electronic device can wake up automatically, but power consumption in standby state increases
Solution Approach 1:
The patent divides the processing system into two independent parts: a low-power first processing system that remains active in standby state to detect user interactions, and a second processing system that is activated only when needed. This segmentation allows the device to maintain automatic wakeup capability while significantly reducing standby power consumption by keeping only the essential detection function active.
Solution Approach 2:
The patent changes the operating parameters of the processing system by switching between different clock frequencies. The first processing system operates at a low clock frequency during standby state to minimize power consumption, while the second processing system operates at a high clock frequency when full processing capability is needed. This parameter change enables the system to adapt its power consumption level to the current operational requirements.
2Loss of information
If more content is displayed on always-on display screen, then user can access more information, but power consumption of electronic device in standby state increases
Solution Approach 1:
The patent applies partial action by having the first processing system perform only the minimum necessary processing to detect user interactions and trigger wakeup, rather than performing complete image processing and analysis. This partial processing approach allows the device to maintain information display capability and automatic wakeup function while consuming less power during standby state.
3Speed
If a single high-frequency clock signal is used for all processing operations, then processing speed is maintained, but power consumption increases during standby state
Solution Approach 1:
The patent implements dynamic clock frequency management where the system automatically adjusts the clock frequency based on the operational state. During standby state, the first processing system uses a low clock frequency to minimize power consumption. When full processing is required, the second processing system is activated with a high clock frequency to maintain processing speed. This dynamic adjustment resolves the contradiction between speed and power consumption.
Data Source
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AI summary
An image processing apparatus, an electronic device, and an image processing method are provided. When the image processing apparatus is in a standby state, a low power system processes image information based on a first clock signal, and triggers the image processing apparatus to switch to a normal working state. When the image processing apparatus is in the normal working state, the low power system works based on one of the first clock signal and a second clock signal, and a high power system works based on the second clock signal. In this manner, clock signals used by the low power system in different states (namely, the standby state and the normal working state) are properly designed, to help reduce power consumption of the low power system and even power consumption of the entire image processing apparatus, and make a power consumption control solution more flexible.