USB Type-C to HDMI Converter Circuit with Direct Signal Conversion
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Solution Overview
Problem
Existing USB type C—HDMI converter circuits face challenges in power supply and signal conversion, requiring additional converters and increasing manufacturing costs, as they need to convert HDMI signals to DP first, and fail to handle additional signals like CEC and HPD, limiting their functionality.
Innovation Solution
A USB converter circuit comprising a HDMI transceiver circuit, a signal converting circuit, and a USB receptacle that directly converts HDMI signals, including video and processing signals, to USB signals, allowing for single-cable USB type C interface—HDMI conversion without intermediate DP conversion, and enabling power delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If HDMI signals are converted to DP signal first then to USB type C, then power supply function can be achieved, but the conversion process requires two converters (HDMI to DP and DP to USB) resulting in greatly increased manufacturing cost and device complexity
Solution Approach 1:
The patent merges the HDMI to DP conversion and DP to USB conversion into a single integrated converter circuit. The circuit directly converts HDMI signals to USB type C interface signals while simultaneously providing power supply function, eliminating the need for two separate converters and reducing device complexity.
Solution Approach 2:
The converter circuit is designed to perform multiple functions simultaneously: signal conversion from HDMI to USB type C interface, power supply delivery, and handling of additional signals (CEC, HPD, 5 volts). This multi-functional design eliminates the need for separate dedicated converters for each function.
2Reliability
If HDMI signals are converted to DP signal first then to USB type C, then power supply function can be achieved, but the manufacturing cost is greatly increased
Solution Approach 1:
The patent merges the HDMI to DP conversion and DP to USB conversion into a single integrated converter circuit. The circuit directly converts HDMI signals to USB type C interface signals while simultaneously providing power supply function, eliminating the need for two separate converters and reducing device complexity.
Solution Approach 2:
The converter circuit is designed to perform multiple functions simultaneously: signal conversion from HDMI to USB type C interface, power supply delivery, and handling of additional signals (CEC, HPD, 5 volts). This multi-functional design eliminates the need for separate dedicated converters for each function.
3Device complexity
If a simple USB type C to HDMI converter is used, then device complexity is reduced, but it cannot supply power and requires additional converters
Solution Approach 1:
The converter circuit is designed to perform multiple functions simultaneously: signal conversion from HDMI to USB type C interface, power supply delivery, and handling of additional signals (CEC, HPD, 5 volts). This multi-functional design eliminates the need for separate dedicated converters for each function.
Solution Approach 2:
The patent merges the HDMI to DP conversion and DP to USB conversion into a single integrated converter circuit. The circuit directly converts HDMI signals to USB type C interface signals while simultaneously providing power supply function, eliminating the need for two separate converters and reducing device complexity.
4Reliability
If USB type C to DP Alt mode is used, then power delivery function is achieved, but additional signals like CEC, HPD and 5 volts cannot be handled
Solution Approach 1:
The converter circuit is designed to perform multiple functions simultaneously: signal conversion from HDMI to USB type C interface, power supply delivery, and handling of additional signals (CEC, HPD, 5 volts). This multi-functional design eliminates the need for separate dedicated converters for each function.
Data Source
AI summary
A Universal Serial Bus (USB) converter circuit includes: a High Definition Multimedia Interface (HDMI) transceiver circuit, a signal converting circuit and a USB receptacle, wherein the HDMI transceiver circuit arranged to transmit/receive a HDMI signal, wherein the HDMI transceiver circuit includes at least a video signal and a plurality of processing signals; the signal converting circuit coupled to the HDMI transceiver circuit is arranged to execute a converting operation to processing a conversion between the plurality of processing signals and A USB signal; and the USB receptacle coupled to the signal converting circuit includes a USB signal pin and a set of video signal pin, wherein the USB signal is transmitted/received with an electronic device through the USB pin, and the video signal is transmitted/received with the electronic device through the set of video signal pin.