Touchscreen Wake Control Using Pose and Motion Filtering
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Solution Overview
Problem
Smartphones frequently transition from a screen-off to a screen-on state due to mistouches caused by friction when carried in pockets or backpacks, leading to increased power consumption.
Innovation Solution
An optical proximity sensor detects the device's uncovered state and counts touch events; if a specified number of touch events occur within a duration, the device determines its pose and motion status to decide whether to turn on the screen, avoiding mistouch-induced screen activations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the touch panel is turned on in response to any touch event, then user responsiveness is improved, but power consumption increases due to mistouch-induced screen activations
Solution Approach 1:
The system performs preliminary detection of motion status and pose information before activating the touch panel. By checking whether the device is in a moving state and whether the pose matches expected usage patterns, the system prevents premature screen activation that would waste energy while still allowing legitimate user interactions to be detected.
Solution Approach 2:
The system continuously monitors motion status and pose information as feedback signals to determine whether a touch event should activate the screen. This feedback mechanism allows the system to dynamically adjust its response to touch events based on real-time device state, preventing mistouches while maintaining user responsiveness.
2Reliability
If the device continuously monitors touch events to prevent mistouches, then mistouch prevention is improved, but device complexity increases
Solution Approach 1:
The motion status detection module and pose detection module serve multiple functions: they detect motion for mistouch prevention, determine device orientation for usage pattern recognition, and provide feedback for intelligent touch event filtering. This multi-functionality reduces the need for separate dedicated components and simplifies the overall system architecture.
Solution Approach 2:
The system merges motion status detection, pose detection, and touch event processing into a unified control logic that operates on existing sensor data. By combining these functions and processing them through a single decision-making framework, the system reduces complexity compared to having separate independent systems for each function.
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 method reduces mistouch-induced screen activations and power consumption by accurately distinguishing user-initiated touches from friction-caused events, maintaining the screen-off state in non-stationary or non-target poses.
Implementation Method 1
an optical proximity sensor in the electronic device detects that the electronic device is currently in an uncovered state
Data Source
AI summary
Methods, devices, and computer-readable media are provided. An example method includes, when an electronic device is in a screen-off state, an optical proximity sensor in the device detects that the device is currently in an uncovered state, and a quantity of times that a touch panel of the device receives a touch event within a specified duration reaches a specified quantity of times, obtaining a current pose and a current motion status of the device. The method includes, when the current motion status of the device is a non-stationary state and the current pose of the device is a target pose, determining not to turn on the touch panel of the device. The target pose represents that an included angle between a plane on which the device is located and a straight line perpendicular to a horizontal plane is less than or equal to a specified angle threshold.