Head-Worn Partial Bootup for Low-Latency Secure Instruction Execution

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Solution Overview

Problem

Head-worn devices face challenges in providing efficient lock-screen functionality due to resource constraints, latency sensitivity, and synchronization of security states across paired devices, leading to increased boot time and potential system unresponsiveness.

Innovation Solution

A security software architecture that allows security settings to be modified on a mobile device while enforcement occurs on the head-worn device, with partial bootup modes to reduce resource consumption and enable seamless transitions to full operation after user authentication.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a head-worn device performs a full bootup process to ensure system readiness and security enforcement, then system reliability is improved, but boot time increases and device responsiveness deteriorates

Engineering Contradiction:
Improvesystem readinessVSAvoidboot time
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The patent implements a partial bootup mode where only essential services and processes are initialized instead of a complete system boot. This allows the device to reach a functional state faster while maintaining core operations, resolving the contradiction between full system readiness and reduced boot time.

Inventive Principle:
Principle #16Partial or excessive action

Solution Approach 2:

The bootup process is divided into multiple stages: a rapid partial bootup for immediate functionality and a subsequent complete bootup for full system readiness. This segmentation allows the device to provide quick response for time-sensitive operations while ensuring comprehensive system initialization when needed.

Inventive Principle:
Principle #1Segmentation

2Reliability

If security settings are enforced on the head-worn device itself, then security reliability is improved, but device complexity and resource consumption increase

Engineering Contradiction:
Improvesecurity enforcementVSAvoidsecurity architecture
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent extracts security setting management from the head-worn device and relocates it to a paired mobile device. The head-worn device only enforces security policies without managing them, reducing its complexity while maintaining security reliability through centralized policy enforcement.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

A paired mobile device acts as an intermediary for security configuration. It manages security settings and synchronizes them with the head-worn device, allowing complex security enforcement without burdening the resource-constrained head-worn device with management overhead.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Use of energy by moving object

If the head-worn device enters a low-power state to conserve energy, then energy efficiency is improved, but device responsiveness and access to functions deteriorate

Engineering Contradiction:
Improvepower consumptionVSAvoiddevice responsiveness
Core Design Contradiction:
Use of energy by moving objectVSEase of operation

Solution Approach 1:

The patent implements dynamic power management where the device transitions between low-power state and partial bootup mode based on operational needs. This allows the device to conserve energy during idle periods while quickly becoming responsive when activated, resolving the contradiction between power efficiency and responsiveness.

Inventive Principle:
Principle #15Dynamics

4Reliability

If lock-screen functionality is implemented on the head-worn device to provide security, then security reliability is improved, but synchronization complexity across paired devices increases

Engineering Contradiction:
Improvelock-screen securityVSAvoidstate synchronization
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The paired mobile device serves as an intermediary for lock-screen management. It maintains the lock-screen interface and security state, while the head-worn device simply enforces the locked/unlocked status. This eliminates complex bidirectional synchronization by centralizing state management on the mobile device.

Inventive Principle:
Principle #24Intermediary (Mediator)

Data Source

PatentUS12498936B2Partial-bootup execution of instructions in a head-worn augmented reality device
Publication Date: 2025.12.16 SNAP INC
  • US12498936B2 patent drawing
  • US12498936B2 patent drawing
  • US12498936B2 patent drawing

AI summary

A method of activating a head-worn device is disclosed. The method includes activating the head-worn device and performing a partial bootup. When an user-input instruction to perform a function is received, it is determined whether or not the user-input instruction is permitted for partial bootup execution. The user-input instruction is executed based on the user-input instruction being permitted for partial bootup execution, and a bootup of the head-work device is completed based on the user-input instruction not being permitted for partial bootup execution. The method may further comprise determining if the user-input instruction requires user authentication in order to be executed, and based on the user-input instruction being partial bootup compatible and not requiring user authentication, executing the user-input instruction.