Kickstand Sensor Power Control for Portable Systems
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Solution Overview
Problem
Portable information handling systems lack an efficient mechanism to dynamically change their operational state based on the position of a kickstand and keyboard, leading to potential accidental power-ons and inefficient power management.
Innovation Solution
A power control system that utilizes a kickstand sensor and a keyboard sensor to determine the operational state of a portable information handling system, powering it up to an active state when the kickstand is opened, whether the keyboard is attached or detached, and maintaining or transitioning to inactive states based on keyboard and kickstand configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the kickstand is opened to support the display, then the device is easier to operate in tablet mode, but the system may accidentally power on consuming battery energy
Solution Approach 1:
The power control system continuously monitors the kickstand position sensor and keyboard position sensor to detect state changes. When the kickstand is opened, the system receives feedback about this position change and automatically responds by powering on the display and processor, ensuring the device is ready for use while preventing accidental power-on when the kickstand remains closed
2Measurement precision
If the power control system automatically powers on when kickstand is opened, then user intent is accurately detected, but the device complexity increases due to additional sensors and control logic
Solution Approach 1:
The power control system serves multiple functions: it monitors kickstand position, monitors keyboard position, determines user intent based on combinations of these inputs, and controls power state transitions. This multi-functional approach consolidates what could be separate systems into a single integrated controller, managing detection accuracy while controlling overall device complexity
Solution Approach 2:
The system uses the existing keyboard position sensor and kickstand position sensor to automatically determine when power-on is intended, eliminating the need for separate detection mechanisms. The power control system self-services by interpreting sensor data and autonomously making power state decisions without requiring additional user input or complex external systems
Data Source
AI summary
A system and method for powering up a portable information handling system based on a position of a kickstand and a position of a keyboard relative to a chassis. When a kickstand is opened, a power control system determines if a keyboard is attached and opened. If the keyboard is not attached and the kickstand is opened, the power control system initiates powering up the portable information handling system. If the keyboard is attached and closed, the portable information handling system is not powered up. If the keyboard is attached and opened, the power control system initiates powering up the portable information handling system. If the kickstand is opened and the keyboard is opened, the power control system initiates powering up the portable information handling system.