Display Control via Handheld Detection During Bluetooth Calls
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Solution Overview
Problem
Existing display control methods in mobile terminals connected to Bluetooth devices fail to adapt to user needs in various scenarios, leading to unnecessary power consumption and screen activation when the user does not require display illumination during calls.
Innovation Solution
Implementing sensors such as capacitance, temperature, acceleration, and ambient light sensors to determine the handheld state of a mobile terminal, along with a camera to detect user interaction, to intelligently control the display's screen-on or screen-off state based on user behavior and environmental conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the display is kept in screen-on state during voice call via Bluetooth device, then user can view display information, but power consumption increases
Solution Approach 1:
The display state is dynamically adjusted based on real-time detection of handheld status. The system transitions between screen-on and screen-off states according to whether the user is holding the device, optimizing power consumption while maintaining usability when needed
Solution Approach 2:
The system uses sensors (capacitance, temperature, acceleration) to continuously monitor user interaction and provide feedback about handheld status. This feedback loop enables intelligent decision-making about display state, balancing user needs with power savings
2Use of energy by moving object
If the display is turned off during voice call via Bluetooth device, then power consumption decreases, but user cannot view display information when needed
Solution Approach 1:
The display state is dynamically adjusted based on real-time detection of handheld status. The system transitions between screen-on and screen-off states according to whether the user is holding the device, optimizing power consumption while maintaining usability when needed
Solution Approach 2:
The system uses sensors (capacitance, temperature, acceleration) to continuously monitor user interaction and provide feedback about handheld status. This feedback loop enables intelligent decision-making about display state, balancing user needs with power savings
3Device complexity
If the distance sensor is disabled when connected to Bluetooth device, then system complexity reduces, but inability to detect user proximity causes unnecessary display activation
Solution Approach 1:
Multiple sensors (capacitance, temperature, acceleration) that serve other functions in the device are repurposed to detect handheld status. This multi-functional approach eliminates the need for dedicated proximity detection hardware while achieving the same power-saving goal
Solution Approach 2:
The mobile terminal uses its own existing sensor capabilities to detect user interaction and automatically control display state. The system serves itself by utilizing internal sensor data to make intelligent power management decisions without requiring additional specialized components
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
Enhances power savings by dynamically adjusting the display state according to user interaction and environmental luminance, ensuring optimal power usage and user experience in diverse scenarios.
Implementation Method 1
The display includes a capacitance sensor, and the determining that the mobile terminal is in a handheld state or a non-handheld state includes: detecting, by using the capacitance sensor, whether the display is touched
Implementation Method 2
The mobile terminal further includes a temperature sensor, and the determining that the mobile terminal is in a handheld state or a non-handheld state includes: collecting, by using the temperature sensor, a skin temperature or a shell temperature of a human body in contact with the mobile terminal
Implementation Method 3
The mobile terminal further includes an acceleration sensor, and the determining that the mobile terminal is in a handheld state or a non-handheld state includes: determining, based on the acceleration sensor, that the mobile terminal is in a handheld state or a non-handheld state
Implementation Method 4
The mobile terminal further includes an ambient light sensor, and before the controlling the display to be in the screen-on state, the method further includes: determining, based on the ambient light sensor, whether light luminance of an ambient environment of the mobile terminal is greater than or equal to a luminance threshold
Data Source
AI summary
A display control method applied to a mobile terminal, which includes a display and is coupled to an external device, includes when the mobile terminal is on a voice call, using the external device; determining that the mobile terminal is in a handheld state or a non-handheld state; when the mobile terminal is in the handheld state, controlling the display to be in a screen-on state; and when the mobile terminal is in the non-handheld state, controlling the display to be in a screen-off state.