Mobile Device Sleep Mode Prevention in Vehicle Cradle
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Solution Overview
Problem
Mobile communications devices enter sleep mode when not in use, turning off the screen backlight and locking the device, which is inconvenient for drivers who need to access the device while driving, and can lead to unintended operations and battery life reduction.
Innovation Solution
A mobile communications device equipped with a charger detector, orientation sensors (such as gyro, accelerometer, or magnetic orientometer), and a GPS unit to determine when it is being charged and mounted in a vehicle, keeping the screen backlight on and the device unlocked, using APIs to manage these settings based on the charge/cradle state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the screen backlight is kept constantly on and the device is kept unlocked for driver convenience, then ease of operation is improved, but energy consumption increases and battery life is reduced
Solution Approach 1:
The system dynamically adjusts the device state (locked/unlocked, backlight on/off) based on real-time detection of charging status and orientation. When the device is detected to be in a phone cradle and charging, it remains unlocked with backlight on; otherwise, it locks and turns off backlight, optimizing energy usage while maintaining convenience when needed.
2Ease of operation
If the device is kept constantly unlocked for driver access, then ease of operation is improved, but harmful factors increase due to undesired activation and unintended operations
Solution Approach 1:
The device dynamically changes its locked/unlocked state based on contextual detection. It remains unlocked only when specifically detected to be in a phone cradle and charging, minimizing the window of opportunity for unintended operations while maintaining accessibility during legitimate driving scenarios.
Solution Approach 2:
The system uses charging status and orientation detection as intermediary conditions to mediate between the locked and unlocked states. These intermediate detection mechanisms provide a safety buffer, ensuring the device is in the intended context before allowing unlocked access, thereby preventing unintended activations.
3Use of energy by moving object
If the backlight is turned off to save battery power, then energy consumption is reduced, but ease of operation deteriorates due to delayed access and driver distraction
Solution Approach 1:
The backlight state is dynamically controlled based on detected context. When the device is in a phone cradle and charging, the backlight remains on for immediate driver access. When not in this state, the backlight turns off to conserve battery, achieving energy efficiency without compromising usability in driving scenarios.
Data Source
AI summary
A mobile communications device includes at least one application programmer interface (API) to provide status information from components of the device, where the status information is indicative of the device being operated in an automobile, and a decision unit to modify at least one of screen backlighting and device locking in accordance with a driving state determined in accordance with at least the status information. A method for preventing sleep mode in a mobile communications device includes detecting active charging of the device, establishing that the device is in an automotive vehicle, based on the detecting and establishing, determining that a charging/vehicle state exists; and when the charging/vehicle state exists, instructing a screen backlight of the device to remain on, and disabling key locking for the mobile communications device.