Display Device Daisy Chain USB Data Transmission
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Solution Overview
Problem
Current USB Type C interfaces are not compatible with daisy chain frameworks for simultaneous image and data transmission, requiring multiple cables to connect multiple display devices, which limits their functionality.
Innovation Solution
A display device design that uses a single USB cable to transmit both image and USB data by incorporating multiple USB interfaces and multiplexers, allowing a host to broadcast data to multiple devices in a daisy chain configuration, with the signal configuration unit managing data transmission paths across different channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple transmission cables are used to connect display devices in a daisy chain framework, then data and image transmission can be achieved, but the device complexity and cable quantity increase
Solution Approach 1:
The patent combines image data transmission and USB data transmission into a single USB Type-C cable connection. The display device includes a USB interface that receives both image data and USB data through the same physical cable, merging two separate transmission functions into one unified interface, thereby eliminating the need for multiple cables while maintaining daisy chain capability
Solution Approach 2:
The USB Type-C interface is designed to perform multiple functions simultaneously: it serves as both an image data transmission channel and a USB data transmission channel. The interface controller is configured to separate and process different data types through the same physical connection, enabling one cable to fulfill multiple transmission roles that traditionally required separate cables
2Quantity of substance
If a single USB cable is used to transmit both image and USB data, then cable quantity is reduced, but the interface complexity and signal configuration requirements increase
Solution Approach 1:
The USB interface is segmented into distinct functional channels: one channel dedicated to image data transmission and another channel dedicated to USB data transmission. The interface controller divides the incoming data stream and routes image data to the display processing unit while routing USB data to the USB processing unit, thereby managing complexity through functional segmentation within the unified cable interface
Solution Approach 2:
The interface controller serves as an intermediary that receives the combined data stream from the USB Type-C cable, separates the image data from the USB data, and directs each type to its appropriate processing destination. This intermediary component manages the complexity of handling multiple data types through a single cable by providing a centralized point for data separation and routing
Data Source
AI summary
A display device is provided, which includes a display panel, a controlling unit, a first universal serial bus (USB) interface, a signal configuration unit, and a second universal serial bus interface. The controlling unit controls the display panel to display an image frame according to display data. When the first USB interface is connected to an external device, the signal configuration unit receives the display data and USB data via the first USB interface, and transmits the display data to the controlling unit. The second USB interface receives the display data from the controlling unit and receives the USB data from the signal configuration unit, so as to transmit the display data and the USB data to another display device via an USB cable.