Radar Keyboard Presence Detection for Accurate Sleep Control
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Solution Overview
Problem
Existing computer devices face issues with erroneous entry into sleep mode during use, leading to unnecessary power consumption and data exposure, especially in remote work environments, due to inadequate motion detection sensitivity and the need for manual configuration.
Innovation Solution
A system utilizing a radar module integrated into a keyboard to detect user presence, activating a timer and sending sleep or lock mode instructions based on user movement, with adjustable timing settings to prevent unnecessary power consumption and data exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If software-based activity monitoring is used to automatically enter sleep state, then power consumption is reduced, but the device erroneously enters sleep state during normal use
Solution Approach 1:
The patent replaces software-based activity monitoring with a radar-based detection system. The radar module continuously monitors for user presence by detecting motion, breathing, or heartbeat signals, providing more reliable detection than software monitoring of keyboard or mouse activity. This substitution resolves the contradiction by enabling accurate sleep state activation without erroneous entry during normal use.
Solution Approach 2:
The patent introduces a radar module as an intermediary between the user and the sleep state control system. The radar module acts as a mediator that detects user presence independently of peripheral device activity, providing accurate information to the processor to determine when the user has actually left the device. This intermediary resolves the contradiction by decoupling sleep state activation from peripheral device usage patterns.
2Loss of information
If the device enters sleep mode after extended period without peripheral activity, then data security is improved, but unnecessary power consumption occurs when device is still in use
Solution Approach 1:
The patent replaces software-based activity monitoring with radar-based detection to accurately determine when the user has actually left the device. The radar module detects the absence of user presence through motion, breathing, or heartbeat signals, enabling the device to enter sleep mode only when truly unused. This resolves the contradiction by preventing premature sleep mode activation during normal use while still securing data when the user has actually departed.
Solution Approach 2:
The patent implements a feedback mechanism where the radar module continuously monitors user presence and provides real-time information to the processor. The system adjusts its behavior based on this feedback, entering sleep mode only when the radar detects prolonged absence of the user. This feedback loop resolves the contradiction by dynamically balancing data security and power consumption based on actual user presence rather than fixed time intervals.
3Loss of information
If manual lock mode activation is required, then data protection is achieved, but users often forget to lock the device
Solution Approach 1:
The patent implements automatic lock mode activation based on radar detection of user absence. The system monitors for user presence continuously and automatically locks the device when the user leaves, eliminating the need for manual lock activation. This resolves the contradiction by making data protection automatic and reliable without requiring user action, while maintaining ease of operation through seamless automated functionality.
Solution Approach 2:
The patent performs preliminary action by automatically locking the device based on detected user absence before any potential security breach can occur. The radar module detects when the user has left and triggers lock mode proactively, rather than requiring the user to remember to lock the device. This preliminary action resolves the contradiction by ensuring data protection is always active when needed without burdening the user with manual operations.
4Difficulty of detecting and measuring
If passive infrared motion sensors are used, then device can detect user presence, but detection sensitivity is insufficient for fine movements
Solution Approach 1:
The patent replaces passive infrared motion sensors with an active radar-based detection system. The radar module actively emits electromagnetic waves and detects their reflection from the user's body, enabling detection of fine movements such as breathing and heartbeat that passive infrared sensors cannot detect. This substitution resolves the contradiction by providing both comprehensive motion detection capability and high measurement precision for fine movements.
Solution Approach 2:
The patent changes the detection parameter from passive infrared radiation detection to active radar wave reflection detection. This parameter change enables the system to detect a broader range of movements including subtle physiological signals like breathing and heartbeat, while maintaining high precision. The radar technology's ability to detect minute changes in reflected wave patterns resolves the contradiction between detection capability and measurement precision.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively puts devices into sleep or lock mode when users are absent, ensuring power savings and data security by detecting fine movements, including breathing, without requiring manual configuration.
Implementation Method 1
A system utilizing a radar module integrated into a keyboard to detect user presence
Data Source
AI summary
A system for putting a computer device into sleep mode, the system being configured to (a) activate a timer to count for a predetermined amount of time; (b) generate motion data with a radar module; (c) if motion data received from the radar module indicates that movement of a user of the computer device has been detected, then repeat steps (a) & (b); (d) if the timer has not expired, then repeat step (b); and (e) send a sleep mode instruction to the computer device. The system can be configured to include the following configurations (i) processing the motion data on the keyboard, and the sleep mode instruction is generated by the system to put the computer device into sleep mode; or (ii) processing the motion data on the keyboard, and the sleep mode instruction is generated by the computer device to put the computer device into sleep mode; or (iii) processing the motion data on the computer device, and the sleep mode instruction is generated by the computer device to put the computer device into sleep mode.