Mobile Display Management Using Proximity and Accelerometer Sensors
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current mobile devices face challenges in managing the display during voice communication sessions, as existing proximity sensors can inadvertently turn off the display when the user attempts to access other phone functions, leading to a suboptimal user experience and reduced battery life due to unnecessary power consumption.
Innovation Solution
The use of both a proximity sensor and an accelerometer to determine if the device is being held vertically against the user's head during a call, allowing the display to be turned off only in this orientation, and turning it back on when the device is moved to a horizontal position, thereby distinguishing between call usage and accessing other phone functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the display is turned off when an object is detected proximate the phone during a call, then battery life is extended, but the display may be turned off when the user attempts to access other phone functions
Solution Approach 1:
An accelerometer is introduced as an intermediary sensor to work in conjunction with the proximity sensor. The accelerometer detects device orientation and provides additional context to distinguish between legitimate call usage (device held to ear) and other functions (device held away from ear). This mediator resolves the contradiction by adding a layer of intelligence that prevents false display shutdowns while maintaining battery savings during actual calls.
2Loss of energy
If the display is turned off during voice communication sessions, then power consumption is reduced, but user experience deteriorates due to unnecessary display shutdowns
Solution Approach 1:
The system implements feedback by continuously monitoring both proximity and orientation sensors during calls. The display shutdown decision is based on feedback from both sensors working together - the proximity sensor detects objects near the device while the accelerometer provides feedback on device orientation. This dual-feedback mechanism ensures the display is turned off only when both conditions indicate legitimate call usage, preventing unnecessary shutdowns that would degrade user experience while still achieving power savings.
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 extends battery life by minimizing unnecessary display usage during calls while allowing users to access phone functions without inadvertently turning off the display, enhancing user experience and battery performance.
Implementation Method 1
detecting an object proximate the mobile phone with a proximity sensor
Implementation Method 2
determining an orientation of the mobile phone as approximately vertical with an accelerometer
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The display of a mobile device is managed using a proximity sensor and an accelerometer. In one example, the display of a mobile device is turned off when a proximity sensor detects an object is proximate the device and an accelerometer determines the device is in a first orientation, and turned on after at least one of (a) determining that the object is not proximate the mobile device or (b) determining that the orientation of the mobile device changes from the first orientation to a second orientation for a more than second threshold period of time.