Device Controller Sensor Initialization from Power-Off
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Solution Overview
Problem
Personal computer systems face challenges in accurately initializing displays and other hardware from low-power and power-off states due to temperature and environmental variable changes, leading to perceptual differences in display output during wake-up.
Innovation Solution
A device controller with sensors detects physical variables like temperature and compares them to thresholds to initialize computer hardware and displays from a power-off state, ensuring more accurate and stable operational characteristics upon reactivation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the display is powered down to a low-power or power-off state during periods of inactivity, then power consumption is reduced, but temperature and environmental variables change causing operational characteristics to drift from default values
Solution Approach 1:
The system performs preliminary detection of temperature and other physical variables during the power-off state, and pre-calculates the appropriate operational characteristics before the display is fully initialized. This preliminary action ensures that when the display wakes up, the correct parameters are already determined, preventing drift from default values while maintaining power savings during inactivity
Solution Approach 2:
The system uses sensor feedback to continuously monitor temperature and other physical variables even during low-power states. This feedback mechanism allows the system to track environmental changes and adjust operational characteristics accordingly when the display is reactivated, ensuring accuracy is maintained despite power cycling
2Measurement precision
If the display is fully initialized with subroutines to balance operational characteristics to real-time variable values, then display accuracy is improved, but initialization time is significantly increased
Solution Approach 1:
The system performs preliminary detection and calculation of operational characteristics during the power-off state, so that when the display wakes up, the initialization process can skip time-consuming subroutine executions. The temperature and other variables are already measured and processed, allowing for faster startup while maintaining accuracy
Solution Approach 2:
Instead of performing a complete full initialization with all subroutines every time the display wakes up, the system performs only the necessary partial initialization using pre-calculated values. This reduces the initialization time significantly while still achieving the required display accuracy for the current environmental conditions
3Speed
If the display uses default state values for initial video output upon wake-up, then initialization speed is improved, but perceptual differences in display output occur due to temperature changes
Solution Approach 1:
The system performs preliminary detection of temperature and calculates the appropriate operational characteristics during the power-off state, so that when the display wakes up, it can immediately use these pre-calculated values instead of default values. This maintains both fast wake-up speed and display output consistency by having the correct parameters ready in advance
Solution Approach 2:
The system dynamically changes the operational parameters based on detected temperature and other physical variables, rather than using fixed default values. By adjusting parameters like voltage, contrast, and color temperature based on the actual environmental conditions measured during the power-off state, the display maintains output consistency while achieving fast wake-up performance
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 reduces the time and effort required for full initialization, enhancing user experience by minimizing perceptual differences and stabilizing display output upon wake-up.
Implementation Method 1
The device controller has at least one sensor device operative to determining a physical variable related to the device
Data Source
AI summary
This paper describes various embodiments that relate to personal computer systems, and accurate initialization of computer hardware of personal computer systems from a low-power and/or power-off state. According to one embodiment of the invention, a computer system includes a device operative to be powered down to the power-off state dependent upon an amount of user activity on the computer system. The computer system also includes a device controller operative to initialize the device from the power-off state to a power-on state responsive to user activity on the computer system. The device controller has at least one sensor device operative to determining a physical variable related to the device, and operating characteristics of the device are related to the physical variable.