Mobile Terminal Proximity Sensor Gesture Activation Logic
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Solution Overview
Problem
Existing mobile terminals lack the ability to activate the depth camera and display without user intention, leading to unnecessary power consumption and potential distractions due to accidental proximity sensor activations.
Innovation Solution
A mobile terminal design that includes a proximity sensor to detect specific sequences of proximity and separation states of a target object, allowing the depth camera and display to activate only when the object approaches and moves away twice within a predetermined time, setting reference values and thresholds to prevent accidental activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the depth camera and display are activated automatically when the proximity sensor detects a target object, then the user can conveniently control the terminal without touching it, but the terminal may be activated accidentally causing unnecessary power consumption and user distraction
Solution Approach 1:
The system performs preliminary detection using the proximity sensor before activating the depth camera and display. The proximity sensor continuously monitors for target objects and only triggers the deeper activation sequence when specific conditions are met, preparing the system in advance without full activation
Solution Approach 2:
The system uses feedback from the proximity sensor's continuous monitoring to control the activation state of the depth camera and display. The proximity sensor provides ongoing information about target object presence, and this feedback determines whether activation occurs, creating a closed-loop control system that prevents accidental activation
2Speed
If the depth camera is continuously activated to detect target objects, then the terminal can respond immediately to user gestures, but the power consumption increases significantly
Solution Approach 1:
Instead of continuous activation, the depth camera is activated periodically or event-driven based on proximity sensor detection. The system switches between active and sleep states, activating the power-consuming depth camera only when the proximity sensor detects a target object within the trigger range, thereby reducing overall power consumption while maintaining responsive detection capability
Solution Approach 2:
The proximity sensor performs preliminary detection in a low-power state before activating the depth camera. This preliminary action allows the system to prepare for potential depth camera activation without actually activating it, reducing power consumption while maintaining the ability to respond quickly when needed
3Device complexity
If the proximity sensor uses simple threshold detection, then the activation logic is simple, but the terminal may be activated accidentally by objects that are not intended targets
Solution Approach 1:
The system changes the detection parameters dynamically based on the situation. The proximity sensor has different detection ranges and threshold values depending on whether the system is in sleep or active state. When the depth camera is activated, the system can adjust the proximity detection parameters to distinguish between trigger objects and non-trigger objects, improving activation accuracy without significantly increasing complexity
Solution Approach 2:
The proximity sensor acts as an intermediary between the physical world and the depth camera activation. It filters and pre-processes detection information, using its output to control whether the depth camera activates. This intermediary layer adds a level of intelligence that prevents accidental activation while maintaining relatively simple overall system architecture
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 solution enables the mobile terminal to switch to an active state without user touch, improving energy efficiency by ensuring the depth camera and display only activate when intended, reducing unnecessary power consumption and user distractions.
Implementation Method 1
The proximity sensor may emit light to the target object, and may distinguish a proximity of the target object using light quantity data reflected from the target object.
Data Source
AI summary
Provided is a mobile terminal characterized by comprising: a display unit which outputs visual information; a depth camera which captures a subject and acquires a depth image; a memory which stores a vein pattern of a user's hand; and a control unit connected to the display unit, the depth camera, and the memory. The control unit identifies the shape of the user's hand from the depth image, authenticates the user using a pre-stored user vein pattern, and when the user is authenticated, executes a specific application in response to a three-dimensional gesture of the user's hand, and omits an authentication procedure required by the specific application.