HDMI Sync Device EDID Management for Version Compatibility
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Solution Overview
Problem
HDMI 2.0 sync devices often overwrite and lose VSDB data when connected to HDMI 1.4 source devices, leading to incorrect recognition of display capabilities, resulting in issues with resolution and color output.
Innovation Solution
An electronic device with separate memory areas for HDMI 1.4 and HDMI 2.0 VSDB data, where the processor controls the reading of EDID information based on menu settings, ensuring that HDMI 1.4 data is prioritized when the menu is inactive, preventing data loss and ensuring proper recognition by HDMI 1.4 source devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an HDMI 2.0 sync device stores both VSDBs in one storage area, then the device can support both HDMI 1.4 and HDMI 2.0 versions, but the firstly read VSDB data is lost and overwritten by subsequently read VSDB data
Solution Approach 1:
The patent divides the storage area into separate regions: a first storage area for HDMI 1.4 VSDB data and a second storage area for HDMI 2.0 VSDB data. This segmentation prevents data overwriting by ensuring each version's data is stored in its designated area, resolving the contradiction between supporting multiple HDMI versions and preventing data loss.
2Adaptability or versatility
If an HDMI 1.4 source device reads EDID of an HDMI 2.0 sync device, then the source device can connect to the sync device, but the source device cannot properly recognize Extended Display Identification Data due to data overwriting
Solution Approach 1:
The patent introduces a menu as an intermediary mechanism that controls which VSDB data is transmitted to the source device. When the menu is activated, the sync device transmits the first VSDB data (HDMI 1.4 format) to compatible source devices, ensuring proper EDID recognition while maintaining cross-version connectivity.
3Reliability
If a user manually sets an HDMI version menu, then the sync device can provide optimal UHD screen or HDR screen, but the setup process becomes more complex
Solution Approach 1:
The patent implements automatic detection functionality where the sync device automatically detects the source device's HDMI version capability and activates the appropriate menu setting without user intervention. The device self-configures to transmit the correct VSDB data format, providing optimal display output while eliminating manual configuration requirements.
Data Source
AI summary
An electronic device is disclosed. The electronic device receiving content from an external device includes a memory configured to include a first HDMI version of Extended Display Identification Data (EDID) information, a second HDMI version of EDID information, the second HDMI version being an upgraded version of the first HDMI version and, at least one resolution information supportable in the electronic device other than the first HDMI version of EDID information, an external interface configured to communicate with the external device and a processor configured to cause the second HDMI version of EDID information to not be read by the external device, to cause the EDID information of the first HDMI version among the EDID information to be read by the external device, and to cause the at least one resolution information to be read by the external device.