USB Type-C Interface Multiplexing for TV Signal Transmission
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Solution Overview
Problem
The USB-Type-C interface is not widely applicable to television devices due to incompatibility between billboard signal transmission and USB2.0 signal transmission functions, as the number of USB D+/D− differential terminals is fixed, preventing simultaneous fulfillment of both demands.
Innovation Solution
A television device design that includes an SOC chip with a DFP interface connected to a switch module via USB D+/D− differential pairs, a USB Type-C interface master control module with a UFP interface connected to the switch module, and a multiplexing switch to selectively enable USB2.0 or billboard signal transmission based on the external device type, using control signals to manage channel switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the USB-Type-C interface uses fixed USB D+/D− differential terminals for USB2.0 signal transmission, then USB2.0 signal transmission function is achieved, but billboard signal transmission function cannot be simultaneously supported
Solution Approach 1:
The patent implements dynamic terminal configuration by introducing a switch module that can dynamically connect USB D+/D− differential terminals to different functional modules (USB2.0 module or billboard module) based on the type of external device detected. This dynamic switching capability allows the same physical terminals to serve different functions at different times, resolving the contradiction between supporting multiple functions and maintaining fixed terminal configuration.
Solution Approach 2:
The patent makes the USB D+/D− differential terminals universal by enabling them to serve dual purposes: USB2.0 signal transmission and billboard signal transmission. Through the switch module controlled by the master control module, the same terminals can be allocated to different functional modules based on operational requirements, achieving multi-functionality without increasing the number of physical terminals.
2Adaptability or versatility
If the USB-Type-C interface is designed to support both USB2.0 and billboard signal transmission, then interface versatility is improved, but terminal allocation conflict arises due to fixed terminal numbers
Solution Approach 1:
The system dynamically allocates USB D+/D− differential terminals to different signal transmission functions based on the detected external device type. The master control module identifies whether the external device is a USB device or a billboard device, and accordingly switches the terminal connection to the appropriate module (USB2.0 module or billboard module), ensuring reliable signal transmission for the specific function required without terminal allocation conflicts.
Solution Approach 2:
The switch module acts as an intermediary between the USB D+/D− differential terminals and the functional modules (USB2.0 module and billboard module). It mediates the connection by selectively routing terminal signals to the appropriate module based on control signals from the master control module, thereby resolving terminal allocation conflicts and ensuring reliable signal transmission for the active function.
3Ease of manufacture
If the television device uses USB-Type-C interface with fixed terminal configuration, then manufacturing simplicity is maintained, but multifunctional application capability is limited
Solution Approach 1:
The patent maintains manufacturing simplicity by using fixed physical terminal configuration while introducing dynamic functional configurability through the switch module. The terminals themselves remain fixed in number and position, but their functional assignment becomes dynamic based on the external device type, allowing multifunctional application capability without complicating the physical interface structure.
Solution Approach 2:
The patent segments the functional logic from the physical terminal structure. The physical terminals remain fixed and simple for manufacturing, while the functional capabilities are segmented into separate modules (USB2.0 module, billboard module) that can be dynamically activated through the switch module, enabling multifunctionality without increasing manufacturing complexity.
Data Source
AI summary
The present application is directed to a television device and a control method therefor. The television device comprises an SOC chip, a DFP interface thereof being connected to a switch module via a USB D+/D− differential pair, and the USB D+/D− differential pair between the DFP interface and the switch module being a first channel; a USB Type-C interface main control module provided with a UFP interface, the UFP interface being connected to the switch module via a USB D+/D− differential pair, and the USB D+/D− differential pair between the UFP interface and the switch module being a second channel; and a USB Type-C interface connected to the switch module via a USB D+/D− differential pair. The USB Type-C interface main control module is also connected to the switch module via a control signal line.