Low-Power Processor Motion Detection for Fast Boot
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Solution Overview
Problem
Current media devices, such as televisions, face challenges in meeting energy conservation standards due to high power consumption in standby modes, especially with increasing feature sets and long boot-up sequences, leading to user dissatisfaction with delayed startup times.
Innovation Solution
A system and method that toggles between power modes based on motion detection, using a low-power processor and motion sensor to initiate the central processing unit into a ready mode when user presence is detected, allowing for quick startup while conserving energy in standby modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the television enters a standby-state by powering down the main display while keeping the main CPU and chipsets powered, then the television can detect on-state requests, but the power consumption is too great to meet energy conservation standards
Solution Approach 1:
The processing unit is segmented into two distinct components: a low-power standby processing unit and a main processing unit. The standby processing unit handles basic functions like detecting on-state requests with minimal power consumption, while the main processing unit is powered down during standby but can be quickly activated when needed. This segmentation allows the system to meet energy conservation standards while maintaining essential functionality.
2Use of energy by stationary object
If the television powers down more components to meet energy standards, then power consumption is reduced, but the boot-up time increases due to long initialization sequences
Solution Approach 1:
The standby processing unit performs preliminary actions during the standby state by pre-loading essential data, initializing critical subsystems, and maintaining readiness states for components that will need to activate quickly. This preliminary preparation significantly reduces the boot-up time when the main processing unit is activated, as much of the initialization work has already been completed or prepared in advance.
3Loss of time
If the television keeps the main CPU powered to reduce boot-up time, then startup is faster, but the television cannot meet energy conservation standards
Solution Approach 1:
The standby processing unit serves as an intermediary between the fully powered main processing unit and the completely powered-down state. It maintains a middle ground by staying partially active with minimal power consumption, handling background tasks, and preparing the system for quick activation. This intermediary role allows the system to achieve both energy efficiency and fast startup times without keeping the full main CPU powered continuously.
Data Source
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AI summary
There is provided a system and method for toggling between system power modes based on motion detection. More specifically, in one embodiment, there is provided a video unit (100), comprising a central processing unit (106), a low-power processor (108) coupled to the central processing unit (106), and a motion detector (118) coupled to the low-power processor (108), wherein the low-power processor (108) is configured to initiate the central processing unit (106) into a ready power mode as a result of motion detected by the motion detector (118).