HDMI-Free Display Device Using TypeC Interface Signal Switching
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Solution Overview
Problem
Existing display devices with HDMI interfaces are large and inconvenient to carry due to their size, as they are not compatible with the smaller TypeC interface which can simultaneously supply power and output signals.
Innovation Solution
A HDMI-free display device design that includes a TypeC interface, a TypeC protocol chip, a switching chip, a DP switch, and a monitor main control chip, allowing the TypeC interface to be compatible with HDMI signals by determining the signal type and plug-in state, and controlling signal switching to connect TypeC or HDMI signals to the appropriate receiving ends.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a display device uses a TypeC interface instead of HDMI, then the device size is reduced and portability is improved, but the compatibility with HDMI signals is lost
Solution Approach 1:
The TypeC interface is designed to handle multiple signal types (TypeC signals and HDMI signals) through a single physical connector. The interface can automatically detect and switch between different signal protocols, making the display device universally compatible with both TypeC and HDMI sources while maintaining a compact form factor without traditional HDMI port
Solution Approach 2:
A signal switching mechanism acts as an intermediary between the TypeC interface and the display processing circuits. This mediator detects the input signal type and routes it to the appropriate processing path, enabling HDMI signal compatibility through the TypeC interface without requiring a dedicated HDMI connector
2Adaptability or versatility
If a display device includes both TypeC and HDMI interfaces, then compatibility with both signal types is improved, but the device size increases and portability decreases
Solution Approach 1:
The TypeC interface serves dual purposes by supporting both native TypeC signals and HDMI signals through the same physical connector. This eliminates the need for separate HDMI and TypeC ports, reducing device size while maintaining compatibility with both signal types
Solution Approach 2:
The functionality of separate TypeC and HDMI interfaces is merged into a single TypeC interface. The interface incorporates signal detection and switching capabilities that allow it to handle both TypeC and HDMI protocols, consolidating what would traditionally require two separate connectors into one
Data Source
AI summary
Disclosed is a HDMI-free display device, which includes a TypeC interface, a TypeC protocol chip, a switching chip, a DP switch and a monitor main control chip with a DP receiving end and a HDMI receiving end; the TypeC interface is connected to the DP receiving end and the HDMI receiving end of the monitor main control chip via the switching chip and the DP switch; a CC pin of the TypeC interface is connected with the TypeC protocol chip and configured for the TypeC protocol chip to determine whether a transmission signal is a HDMI signal or a TypeC signal and to determine whether the transmission signal is in a positive or negative plug-in state; the TypeC protocol chip is further configured to control the switching chip to transfer the transmission signal to be in a positive plug-in state.