Display Device EDID Switching for Automatic HDMI Compatibility
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Solution Overview
Problem
Users have to manually set the HDMI version on a display device to match the HDMI version supported by a source device, leading to compatibility issues due to different HDMI standards, and existing technologies do not automatically adjust EDID information to ensure compatibility.
Innovation Solution
The display device automatically provides EDID information corresponding to the HDMI version supported by the source device, using a processor to detect and adjust EDID information to match the source device's HDMI version, storing multiple EDID versions and changing them as needed to ensure compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the display device provides fixed EDID information, then the device complexity is reduced, but the adaptability to different HDMI versions deteriorates
Solution Approach 1:
The patent implements dynamic EDID information that automatically changes based on the detected HDMI version. The system transitions from static, fixed EDID data to dynamic, adaptable EDID data that adjusts its parameters (such as maximum TMR clock frequency) according to the connected source device's HDMI version, thereby resolving the contradiction between simplicity and adaptability.
Solution Approach 2:
The patent changes key parameters within the EDID information based on HDMI version detection. Specifically, it modifies parameters such as maximum TMR clock frequency (e.g., 340MHz for HDMI 1.4, 600MHz for HDMI 2.0, 810MHz for HDMI 2.1) and audio channel configurations to match the capabilities of the connected source device, enabling seamless compatibility across different HDMI versions.
2Reliability
If the user manually sets the HDMI version, then the compatibility is ensured, but the ease of operation deteriorates
Solution Approach 1:
The patent enables the display device to automatically detect the HDMI version of the connected source device and adjust its EDID information without requiring user intervention. The system performs self-configuration by reading the source device's capabilities and setting appropriate EDID parameters, thereby eliminating the need for manual HDMI version setting while ensuring compatibility.
Solution Approach 2:
The patent implements a feedback mechanism where the display device detects the HDMI version information from the source device, uses this feedback to determine the appropriate EDID configuration, and automatically applies the correct settings. This closed-loop approach ensures compatibility while removing the burden of manual configuration from the user.
3Adaptability or versatility
If the display device supports multiple HDMI versions, then the adaptability improves, but the device complexity increases
Solution Approach 1:
The patent segments the EDID information into version-specific configurations, with each HDMI version (1.4, 2.0, 2.1) having its own standardized parameter set. The system divides the EDID data structure to include version identifiers and corresponding parameter groups, allowing selective activation of appropriate segments based on the detected HDMI version, thereby managing complexity through structured organization.
Solution Approach 2:
The patent prepares multiple pre-configured EDID information sets corresponding to different HDMI versions before connection is established. Each pre-configured set contains standardized parameters optimized for its respective HDMI version, allowing the system to quickly switch between configurations without complex real-time calculations, thus reducing operational complexity while maintaining multi-version support.
Data Source
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AI summary
A display device includes an external input interface connected to a source device, a memory configured to store first extended display identification data (EDID) information to be provided to the source device and store a plurality of second EDID information supportable by the display device, and a processor configured to determine the presence or absence of a video signal or an audio signal input from the source device, and when there is no video signal or audio signal input from the source device, change the first EDID information to be provided to the source device to second EDID information of a version different from that of the first EDID information among the plurality of second EDID information.