Display Presence Detection for Adaptive Power Modes
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices face inefficiencies in power management, often leading to inconvenience for users when they are not directly interacting with the device, such as during activities like watching a movie or viewing a document, as they automatically switch to screensavers or turn off.
Innovation Solution
Implementing presence detection using sensors like radar to switch between power modes based on user presence, activating and deactivating components accordingly to conserve power and maintain user interaction readiness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the display device automatically turns off or activates screensaver after a period of inactivity, then power consumption is reduced, but user convenience deteriorates when the user is merely viewing content without direct interaction
Solution Approach 1:
The system dynamically adjusts power modes based on real-time presence detection. When a user is detected nearby, the device maintains an active state; when no user is present, it transitions to power-saving mode. This dynamic adaptation resolves the contradiction by making the power state contingent on actual usage conditions rather than fixed inactivity timers.
Solution Approach 2:
The system uses sensors (camera, microphone, motion detectors) to continuously monitor for user presence and provides feedback to the power management system. This feedback loop allows the device to distinguish between intentional inactivity (user watching content) and unintentional inactivity (no user present), thereby maintaining convenience while optimizing power consumption.
2Ease of operation
If the display device remains continuously active to detect user presence, then user convenience is maintained, but power consumption increases
Solution Approach 1:
Instead of continuous monitoring, the system employs periodic presence detection at strategically chosen moments (e.g., when transition from active to power-saving mode is contemplated). This periodic checking maintains user convenience by detecting presence when needed while significantly reducing power consumption compared to continuous operation.
Solution Approach 2:
The system uses a tiered detection approach where less power-intensive sensors are used for initial presence checks, and more power-intensive sensors or full system activation occurs only when presence is detected or suspicion arises. This partial action approach maintains convenience while optimizing energy usage.
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
This approach allows display devices to save power by reducing component usage when not in use while remaining responsive to user presence, enhancing user experience by staying active when the user is nearby.
Implementation Method 1
The display device may include a sensor, such as a radar sensor, that the display device uses to detect objects, such as a user.
Data Source
AI summary
This disclosure describes, in part, techniques for using presence detection in order to switch between power modes of a display device. For instance, the display device may operate in a first power mode by deactivating a display. While operating in the first power mode, the display device may use a sensor to detect a presence of a possible object. The display device may then switch to a second power mode in order to verify that the possible object is an actual object. In response, the display device may switch to a third power mode by at least activating the display and presenting a user interface using the display. The display device may then receive an interaction. In response, the display device may switch to a fourth power mode by at least presenting content.