Personal Computing Device Face Recognition for Passive Access Control

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Solution Overview

Problem

Personal computing devices often perform functions regardless of whether users are passively interfacing, leading to inconvenience and inefficiency, and lack effective user presence detection and authorization mechanisms.

Innovation Solution

Implementing a personal computing device with an image sensor and processor to detect and recognize user faces, allowing control of operations based on presence and authorization without active user input, using pattern recognition algorithms for face detection and recognition.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the device continuously monitors for user presence using active sensing methods, then user presence detection accuracy is improved, but energy consumption increases

Engineering Contradiction:

Improveuser presence detection accuracyVSAvoidenergy consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The system performs face detection at periodic intervals rather than continuously, activating the image sensor and processing algorithms only at scheduled times to detect user presence or absence, thereby reducing energy consumption while maintaining adequate detection accuracy

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system uses the device's existing display and interface components to provide feedback about detected user presence, allowing the device to self-monitor and self-adjust operations based on detected conditions without requiring additional dedicated sensing hardware

Inventive Principle:

Principle #25Self-service

2Reliability

If the device requires active user input for authorization, then security is improved, but user convenience deteriorates

Engineering Contradiction:

Improveauthorization securityVSAvoiduser convenience

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The system replaces traditional mechanical or manual authorization methods (keyboards, password entry, physical tokens) with optical recognition technology using image sensors and pattern recognition algorithms to automatically identify and authorize users based on facial features, maintaining security while eliminating the need for active user input

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system introduces an intermediary authorization mechanism that uses detected user presence information to automatically grant or deny access to device functions, serving as a mediator between security requirements and user convenience by making authorization decisions based on passive facial recognition rather than active user authentication

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If the device performs functions without detecting user presence, then productivity is improved, but user experience deteriorates

Engineering Contradiction:

Improvedevice operation efficiencyVSAvoiduser experience

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

The system dynamically adjusts device operations and function availability based on real-time detection of user presence or absence, enabling the device to optimize productivity by performing automated tasks when no user is present while maintaining user-friendly interactions when a user is detected, thus adapting behavior to current conditions

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS12406490B2Personal computing device control using face detection and recognition

Publication Date: 2025.09.02 APPLE INC

AI summary

Systems and methods are provided for control of a personal computing device based on user face detection and recognition techniques.