Foldable Lid Angle Detection Using Sleep-State Orientation Sensing
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Solution Overview
Problem
Current lid angle detection solutions for foldable electronic devices are high cost and high power consumption, and fail to accurately determine the lid angle when the device is in an upright position or non-steady state, often requiring continuous operation to compensate for these conditions.
Innovation Solution
A foldable electronic device equipped with low-powered first and second sensor units in each lid component, which measure acceleration and angular velocity to calculate orientations, and a high-powered application processor that determines the lid angle upon waking from sleep, using sensor data to remap and update the lid angle accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current lid angle detection solutions are used, then lid angle can be detected, but power consumption is high and cost is high
Solution Approach 1:
The sensor units calculate orientations of lid components in advance while the device is in sleep mode, so that when the device wakes up, the lid angle can be immediately determined from pre-calculated orientation data without requiring continuous high-powered processing
Solution Approach 2:
The system divides functionality between low-powered sensor units that continuously monitor orientation and a high-powered application processor that performs detailed lid angle calculation only when needed, allowing accurate detection while minimizing overall power consumption
2Reliability
If lid angle detection is always running to handle upright position and non-steady state cases, then accurate detection is maintained, but power consumption increases due to high powered processor always being active
Solution Approach 1:
Orientation calculations are performed in advance during sleep mode by sensor units, ensuring that accurate lid angle data is ready when the device wakes up, regardless of whether the device was in upright position or non-steady state, eliminating the need for continuous high-powered processing
Solution Approach 2:
Sensor units act as intermediaries that continuously gather orientation data using low power, preparing this data in advance so the high-powered application processor only needs to perform final lid angle calculation when the device is active, rather than continuously running
3Adaptability or versatility
If hall sensors or magnetometers are used to solve upright position detection, then lid angle can be determined in upright position, but cost and power consumption increase
Solution Approach 1:
Existing accelerometer and gyroscope sensors are used for multiple purposes - both for general motion detection and for calculating lid component orientations to determine lid angle in all positions including upright position, eliminating the need for additional specialized sensors like hall sensors or magnetometers
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 accurate lid angle detection in upright and non-steady states with reduced power consumption by using low-powered sensors during sleep and high-powered processing upon awakening, thus providing a cost-effective and efficient solution.
Implementation Method 1
The first and second sensor units measure acceleration and angular velocity, and calculate orientations of the respective lid components based on the acceleration and angular velocity measurements
Implementation Method 2
The first and second sensor units measure acceleration and angular velocity, and calculate orientations of the respective lid components based on the acceleration and angular velocity measurements
Data Source
AI summary
The present disclosure is directed to a device and method for lid angle detection that is accurate even if the device is activated in an upright position. While the device is in a sleep state, first and second sensor units measure acceleration and angular velocity, and calculate orientations of respective lid components based on the acceleration and angular velocity measurements. Upon the device exiting the sleep state, a processor determines a distance between the calculated orientations, remaps the distance to an estimated lid angle ranging from 0 to 360 degrees, sets the estimated lid angle as an initial lid angle, and updates the initial lid angle using, for example, two accelerometers; two accelerometers and two gyroscopes; two accelerometers and two magnetometers; or two accelerometers, two gyroscopes, and two magnetometers.