Display Device Auto-Off Control via Infrared Signal Detection
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Solution Overview
Problem
Display devices face challenges in determining whether a user is actively using them, leading to unnecessary power-offs when external devices are in use, causing inconvenience and energy waste.
Innovation Solution
Incorporating an infrared sensor and processor to detect infrared control signals, video signal changes, audio level changes, and remote control device signals to initialize and manage an auto-off timer, ensuring the display device remains on when the user is actively using connected external devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the display device automatically turns off power when a user does not use it for a certain period, then energy efficiency is improved, but user convenience deteriorates due to unnecessary power-offs during external device usage
Solution Approach 1:
The system continuously monitors infrared control signals from remote controls to determine whether a user is actively using external devices. This feedback mechanism allows the display device to adjust its power state dynamically - maintaining power on when external devices are in use (detected via infrared signals) and turning off when no activity is detected, thus resolving the contradiction between energy efficiency and user convenience
Solution Approach 2:
The infrared sensor acts as an intermediary that detects user interaction with external devices without requiring direct input to the display device. By monitoring infrared control signals from remote controls, the system can infer user activity status and prevent unnecessary power-offs, thereby maintaining convenience while enabling energy-saving features
2Device complexity
If the display device cannot accurately determine user usage status, then device complexity is reduced, but measurement precision deteriorates leading to incorrect power-off decisions
Solution Approach 1:
The infrared sensor serves as an intermediary detection device that passively monitors control signals between remote controls and external devices. This approach provides accurate user usage detection without requiring complex sensors or active communication systems in the display device itself, thus maintaining simplicity while improving measurement precision
Solution Approach 2:
The system leverages the existing infrared control infrastructure between remote controls and external devices. Instead of requiring the display device to actively query or detect user presence through complex means, it passively receives infrared signals that are already being transmitted for device control, enabling accurate usage detection with minimal additional complexity
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
Minimizes user inconvenience by preventing unnecessary power-offs during active use of external devices, optimizing energy efficiency by accurately determining user interaction with the display device and connected external devices.
Implementation Method 1
an infrared sensor configured to detect an infrared control signal generated from a remote control device for the external device
Data Source
AI summary
The present disclosure provides a display device comprising an external device interface connected to an external device; an infrared sensor configured to detect an infrared control signal generated from a remote control device for the external device; and a processor is configured to: initialize an auto-off timer time to count an auto-off time, when a power of the display device is turned on, initialize the auto-off timer time when the infrared control signal generated from the remote control device for the external device is detected through the infrared sensor, and control the power to be turned off when the automatic off timer time reaches a preset un-used time.