Display Device HDMI-CEC Power State Synchronization
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Solution Overview
Problem
Conventional display devices experience inconsistencies in power states when connected to a set-top box, leading to inconvenient operations and difficulties in switching external inputs, particularly for users inexperienced with these operations.
Innovation Solution
A display device capable of automatically synchronizing its power state with a set-top box by utilizing the HDMI-CEC function, ensuring consistent power operations and automatic switching of external inputs when the set-top box is turned on or off.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a unified power key is selected through the remote controller to control both TV and set-top box, then power control operation is simplified, but the power states of the TV and set-top box become inconsistent causing operational inconvenience
Solution Approach 1:
The display device monitors the power state of the set-top box through HDMI-CEC communication and automatically adjusts its own power state to match, creating a feedback loop that ensures consistency between the two devices while maintaining simplified user operation
Solution Approach 2:
The system automatically synchronizes power states without requiring user intervention. When the set-top box power state changes, the display device self-adjusts its power state through automated HDMI-CEC-based communication and control, eliminating the need for manual coordination
2Adaptability or versatility
If external input switching is manually operated, then the display device can switch to different external devices, but users inexperienced with these operations face inconvenience
Solution Approach 1:
The display device proactively detects when a set-top box is powered on through HDMI-CEC signals and automatically switches the external input to the set-top box before the user needs to use it, eliminating the need for manual input switching operations
Solution Approach 2:
The system performs automatic external input switching based on the power state of connected devices. The display device monitors set-top box power states and autonomously switches inputs accordingly, freeing users from manual switching operations
Data Source
AI summary
A display device according to an embodiment of the present invention can comprise: a display unit; an external device interface unit for exchanging information with a set-top box; and a control unit which receives set-top box information from the set-top box by means of the external device interface unit, determines whether or not a high definition multimedia interface-consumer electronics control (HDMI-CEC) function is turned on on the basis of the received set-top box information, and automatically turns on an HDMI-CEC function of the display device if the HDMI-CEC function is turned on.