Active Stylus Dynamic Mode Switching for Battery Conservation
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Solution Overview
Problem
Active styluses with limited battery life often fail to provide advance warnings of depletion, leading to unexpected functionality loss, and existing systems lack efficient methods to dynamically switch modes to conserve power based on application context and usage.
Innovation Solution
An information handling system that includes a touch controller and stylus controller, enabling dynamic switching between stylus modes by detecting proximity, application support for stylus features, and battery state, allowing for configuration of stylus features to be enabled or disabled based on context, thereby extending battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If all battery-consuming stylus features are enabled to provide full functionality, then the stylus can support all stylus features in the first set, but the battery life is reduced and unexpected functionality loss occurs
Solution Approach 1:
The stylus dynamically switches between a first mode (full functionality) and a second mode (reduced functionality) based on battery state. When the battery reaches a threshold state, the system automatically transitions from enabling all features to disabling selected battery-consuming features, thereby adapting the functionality duration to the remaining energy supply.
Solution Approach 2:
The system changes the operational parameters of the stylus by switching modes. In the first mode, all stylus features are enabled; in the second mode, selected battery-consuming features are disabled. This parameter change allows the stylus to extend battery life while maintaining essential functionality.
2Reliability
If the stylus operates in full functionality mode continuously, then all stylus features remain available, but the battery depletes unexpectedly without advance warning
Solution Approach 1:
The touch controller continuously monitors the battery state of the stylus and provides feedback to determine when to switch modes. When the battery reaches a predetermined threshold, the system receives feedback indicating low energy and automatically switches to the second mode to prevent unexpected functionality loss.
Solution Approach 2:
The system performs preliminary action by switching to the second mode before complete battery depletion occurs. By proactively disabling selected features when the battery reaches a threshold state, the system prevents unexpected functionality loss and ensures continued operation of essential features.
3Duration of action of moving object
If the stylus switches to a second mode with disabled features, then battery life is extended, but the stylus feature set is reduced
Solution Approach 1:
Instead of disabling all battery-consuming features in the second mode, the system selectively disables only certain features while maintaining others. This partial action approach extends battery life without completely sacrificing stylus functionality, allowing essential features to remain available.
Solution Approach 2:
The system applies different operational qualities to different features based on their power consumption characteristics. Selected battery-consuming features are disabled in the second mode, while other features remain enabled, creating a localized optimization of energy usage across the feature set.
4Extent of automation
If the system monitors battery state and application context continuously, then dynamic mode switching is achieved, but the system complexity increases
Solution Approach 1:
The stylus and touch controller perform self-service by automatically monitoring battery state and application context, and autonomously switching modes without user intervention. The system independently determines when to transition between modes based on predefined criteria, reducing the need for complex user interface controls.
Solution Approach 2:
The touch controller serves multiple functions: it acts as the interface for the stylus, monitors battery state, detects application context, and controls mode switching. By consolidating these functions in a single component, the system achieves dynamic mode switching without proportionally increasing overall system complexity.
Data Source
AI summary
A disclosed information handling system includes a touch controller and a touch device. The touch controller may include circuitry to establish a communication link with a stylus, to determine that the stylus should operate in a first one of multiple stylus modes, the first mode defining a set of stylus features to be enabled on the stylus in the first mode, to communicate, to the stylus, an indication that the stylus is to be configured in the first mode, to determine an effect of digital inking by the stylus, dependent on stylus features enabled in the first mode, to determine that the stylus should operate in a second stylus mode, the second mode defining at least a subset of stylus features to be disabled on the stylus in the second mode, and to communicate, to the stylus, an indication that the stylus is to be configured in the second mode.