Video Display Device HDMI CEC Compatibility Verification
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Solution Overview
Problem
Existing video display devices do not effectively determine whether external instruments connected via HDMI can be operated in conjunction with the device, lacking appropriate notification to users about compatibility.
Innovation Solution
A video display device with a connection unit to connect multiple external instruments via a network, a receiving unit to gather standard compatibility information, and a display unit to show this information, allowing users to select compatible instruments for operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the video display device connects to multiple external instruments via HDMI, then the device can access diverse video sources and enhance functionality, but the user cannot determine whether the external instrument can be operated in conjunction with the device
Solution Approach 1:
The system performs preliminary compatibility verification by transmitting CEC capability inquiry signals to external instruments before actual operation. The video display device determines in advance whether the connected instrument supports CEC control and displays this compatibility information, allowing users to know beforehand if conjunction operation is possible.
Solution Approach 2:
The system implements feedback by displaying the determined compatibility information on the screen. The video display device provides visual feedback to users about whether each connected external instrument can be operated in conjunction, enabling informed operation decisions.
2Ease of operation
If the device automatically sets display mode based on received signals, then the operation becomes simpler, but the device still cannot notify users about operational compatibility with external instruments
Solution Approach 1:
The system supplements automatic display mode setting with compatibility feedback. While the device automatically configures display parameters, it simultaneously transmits CEC capability inquiries and displays compatibility results, providing users with reliable information about whether conjunction operation is possible despite automatic settings.
Solution Approach 2:
The CEC capability inquiry signal acts as an intermediary mechanism. The video display device uses this standardized HDMI-CEC protocol signal to mediate between the automatic operation setup and the need for compatibility verification, enabling both automated convenience and reliable compatibility information.
Data Source
AI summary
According to one embodiment, a video display device has a connection unit configured to connect to a plurality of external instruments via a network, a receiving unit configured to receive, from the plurality of external instrument connected to the video display device via the connection unit, standard compatibility information indicating that the external instrument meets the mutual controllability standards, a display unit configured to display video information output by one of the plurality of external instruments and a selection unit configured to select one of the plurality of external instruments, corresponded to information based on the standard compatibility information, connected to the connection unit as an output source of video information to be displayed on the display unit.