Projector Standby Control Using Presence-Based Network Switching
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Solution Overview
Problem
Projectors in standby mode consume excessive power when implementing network-based remote control services, necessitating a solution to enable remote control while minimizing power usage.
Innovation Solution
A projection apparatus with sensors to detect the presence of a living object, switching between power-saving and network-connected modes based on user proximity, using a first sub-standby mode with minimal power consumption and a second sub-standby mode with network connectivity for remote control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the projector maintains network connectivity in standby mode to enable remote control services, then remote control functionality is preserved, but power consumption increases
Solution Approach 1:
The system dynamically switches between two standby modes (first and second sub-standby modes) based on sensor detection of living objects. When no living object is detected, the system enters the first sub-standby mode with lower power consumption and disabled network connection. When a living object is detected, it switches to the second sub-standby mode with higher power consumption and enabled network connection, thus adapting the network connectivity state to actual usage conditions
Solution Approach 2:
The sensor continuously or periodically detects the presence of living objects in the sensing area, triggering periodic transitions between standby modes. This periodic detection and mode switching ensures the system maintains appropriate network connectivity only when needed, rather than continuously maintaining connection
2Use of energy by moving object
If the projector disables network connection in standby mode to save power, then power consumption is reduced, but remote control functionality is lost
Solution Approach 1:
The system uses sensor feedback about living object presence to control network connection state. The sensor continuously monitors the sensing area and provides feedback to the processor, which then adjusts the network connection state accordingly. This feedback mechanism ensures network connectivity is maintained only when users are present in the sensing area
Solution Approach 2:
The system automatically detects user presence and manages its own network connectivity state without requiring manual user intervention. The sensor and processor work together to autonomously determine when network connection is needed and switch between standby modes accordingly, making the system self-aware of its operational context
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 solution allows for efficient power management by maintaining network connectivity only when a user is present, reducing power consumption when the user is absent, thus optimizing power usage without compromising remote control functionality.
Implementation Method 1
enable the sensor to sense whether there is a living object located in a sensing area outside the projection apparatus
Data Source
AI summary
A projection apparatus and a control method thereof are provided. The projection apparatus includes a processor, a sensor, and a projection module. When a command corresponding to a standby mode is received, the processor sets the projection apparatus to a first sub-standby mode. The sensor is enabled to sense whether there is a living object located in a sensing area outside the projection apparatus. The standby mode is maintained as the first sub-standby mode in response to sensing that the living object is not in the sensing area. The standby mode is set to be switched to a second sub-standby mode in response to sensing that the living object is in the sensing area. A maximum power consumption of the first sub-standby mode is less than a maximum power consumption of the second sub-standby mode. In the first and second sub-standby modes, the projection module is not enabled.