Stylus Garage Wake Circuit for Low-Power Folio Systems

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Solution Overview

Problem

Styluses in information handling systems are prone to being lost and do not support immediate interaction with the system upon removal from a storage garage without manual power activation.

Innovation Solution

A system and method that detects stylus removal from a garage to automatically transition the information handling system from a low power state to an on state by using a stylus removal circuit and embedded controller to apply power based on stylus position and folio lid status.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If the system remains in low power state to conserve energy, then energy consumption is reduced, but the system cannot respond immediately when stylus is removed from garage

Engineering Contradiction:

Improvepower consumptionVSAvoidsystem activation speed

Core Design Contradiction:

Use of energy by moving objectVSSpeed

Solution Approach 1:

The system performs preliminary detection of stylus removal from the garage while in low power state, and pre-prepares for activation by detecting the removal event before full system wake-up is needed. This allows the system to transition quickly from low power state upon stylus removal without requiring continuous monitoring while fully powered.

Inventive Principle:

Principle #10Preliminary action

2Ease of operation

If manual power button press is required to activate system, then system activation is controlled, but user interaction is delayed requiring additional manual step

Engineering Contradiction:

Improvesystem activation convenienceVSAvoidtime to activate system

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The system automatically detects when the stylus is removed from the garage and self-activates without requiring manual intervention from the user. The embedded controller monitors the garage state and automatically transitions the system from low power state to active state, making the system serve itself by eliminating the need for manual power button pressing.

Inventive Principle:

Principle #25Self-service

3Reliability

If stylus garage is implemented to prevent loss, then stylus security is improved, but the system remains inactive requiring manual power activation

Engineering Contradiction:

Improvestylus retentionVSAvoidinteraction readiness

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The embedded controller continuously monitors the stylus garage state and uses this feedback to automatically control system power state. When the stylus is detected in the garage, the system remains in low power state. When removal is detected, the system automatically activates, creating a closed-loop feedback system that links stylus position to system readiness.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12468336B2Information handling system folio stylus garage power management

Publication Date: 2025.11.11 DELL PROD LP

AI summary

A portable information handling system stores a stylus in a stylus garage having a stylus presence detection so that on removal of the stylus from the garage the information handling system transitions from a low power state to an on state. In one example embodiment, a low power OR gate monitors a pair of contacts of the stylus to initiate power to an embedded controller when one or both contacts separate from the stylus. The embedded controller detects the stylus position, the housing lid position and other factors to determine when to command power up of the system CPU for transition from the low power state to an on state.