Touch Screen Protection via Proximity and Motion Sensing
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Solution Overview
Problem
Portable electronic devices with touch screens are prone to damage when placed in a pocket with the screen facing outward, as they are susceptible to scrapes and impacts.
Innovation Solution
An electronic device equipped with a capacitive touch screen, distance sensor, motion sensor, and processor that determines the proximity of the screen to an object and detects touch actions, sending warnings to the user via text, audible, or vibration alerts when the screen is at risk of damage due to lack of contact or improper positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the touch screen faces outward in a pocket for easy access, then the ease of operation is improved, but the reliability of the touch screen is worsened due to scrapes and impacts
Solution Approach 1:
The system performs preliminary detection of the device's placement state using distance sensors and motion sensors before damage occurs. When the device is detected to be in a vulnerable position (screen facing outward in pocket), the system proactively sends warnings to the user before any actual contact or damage can happen, allowing preventive repositioning
Solution Approach 2:
The system continuously monitors the device state through distance sensors detecting proximity to objects and motion sensors detecting movement patterns. This feedback loop provides real-time information about potential risks, enabling the system to send timely warnings when the device is in a dangerous configuration, creating a closed-loop protection mechanism
2Reliability
If warning alerts are sent frequently to ensure screen protection, then the reliability is improved, but the user experience deteriorates due to false alarms
Solution Approach 1:
The system uses multiple detection methods (distance sensing, motion sensing, temperature sensing) to partially verify the risk condition before sending a warning. By requiring convergence of multiple indicators rather than acting on a single sensor, the system reduces false warnings while maintaining comprehensive protection
Solution Approach 2:
The system performs preliminary verification of device state using multiple sensors before triggering warnings. Distance sensors check proximity, motion sensors verify movement patterns, and temperature sensors confirm environmental conditions, ensuring warnings are sent only when all indicators confirm actual risk, thereby eliminating false alarms
3Measurement precision
If multiple sensors are added to detect device state accurately, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
The system makes existing multi-functional sensors work together for a new protective function. Distance sensors originally designed for touchless interaction and motion sensors for step counting are repurposed to detect pocket placement state, avoiding additional hardware complexity while achieving precise multi-parameter monitoring
Solution Approach 2:
The system combines the functionality of multiple sensors to achieve accurate device state detection. By merging data from distance sensors, motion sensors, and temperature sensors into a unified detection algorithm, the system achieves high measurement precision for determining whether the device is in a vulnerable position without requiring separate dedicated sensors for each parameter
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
Prevents touch screen damage by alerting the user to reposition the device, reducing unnecessary warnings through temperature and motion detection, ensuring the screen is protected without false alarms.
Implementation Method 1
a distance sensor configured to detect a distance between the touch screen and an object in front of the touch screen
Implementation Method 2
a motion sensor configured to detect whether the electronic device is in a moving state
Implementation Method 3
a capacitive touch screen... a touch detection circuit configured to detect a touch action applied to the touch screen
Data Source
AI summary
An electronic device comprises a touch screen, a distance determining module, a touch determining module, and a warning control module. The distance determining module determines whether a distance between the touch screen and an object in front of the touch screen is less than or equal to a distance limit. The touch determining module determines whether a touch action is applied to the touch screen within a first predetermined time when the distance between the touch screen and the object is less than or equal to the distance limit. The warning control module controls the electronic device to send a warning to a user when no touch action is applied to the touch screen within the first predetermined time.