HDMI EDID Switching for Automatic Version Compatibility
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Solution Overview
Problem
Existing electronic devices require manual user intervention to set the HDMI version menu, which is inefficient and can lead to incorrect identification of HDMI version support, resulting in issues like incorrect resolution or color output when connecting devices with different HDMI standards.
Innovation Solution
An electronic device and method that automatically identifies the HDMI version supported by a source device, changes EDID information, and adjusts the hot plug detect signal to ensure correct EDID information is read, allowing seamless communication between devices without manual user intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the sync device stores only EDID information for the second version (HDMI 2.0) of content transmission encryption, then the device can support high-resolution UHD and HDR content transmission, but it cannot be compatible with source devices that only support the first version (older HDMI versions)
Solution Approach 1:
The patent implements dynamic EDID information switching based on the detected HDMI version of the connected source device. The sync device automatically changes between first EDID information (for older HDMI versions) and second EDID information (for HDMI 2.0) depending on which version is detected, allowing adaptive compatibility across different device generations without manual intervention
Solution Approach 2:
The patent changes the EDID information parameters stored in the sync device based on the HDMI version detected. When an older HDMI version is detected, the device uses first EDID information with appropriate encryption parameters; when HDMI 2.0 is detected, it uses second EDID information with updated parameters for UHD and HDR support, thereby resolving the contradiction between compatibility and advanced feature support
2Measurement precision
If the user manually sets the HDMI version menu to match the source device, then correct EDID information can be selected, but this requires user knowledge and intervention which reduces convenience and efficiency
Solution Approach 1:
The patent enables the sync device to automatically detect the HDMI version of the connected source device and self-adjust the EDID information without requiring user intervention. The device performs automatic version identification through the communication interface and autonomously switches between different EDID information sets, eliminating the need for manual menu settings while maintaining accurate HDMI version matching
Solution Approach 2:
The patent implements a feedback mechanism where the sync device detects the HDMI version information from the source device through the communication interface, uses this feedback to determine which EDID information set to apply, and automatically configures the appropriate settings. This closed-loop system ensures accurate HDMI version identification while completely eliminating manual user input requirements
Data Source
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AI summary
An electronic device includes a memory; a communication interface; and a processor configured to: based on a source device connected through the communication interface being identified to support a version of content transmission encryption, change first Extended Display Identification Data (EDID) information stored in the memory to second EDID information; and change a hot plug detect signal related to the communication interface from a low state to a high state.