Display Device Command Transmission via Bus Switching
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Solution Overview
Problem
In multi-display systems, existing methods require a PC connection for time synchronization and command transmission, which is inconvenient and limits independent operation of display devices.
Innovation Solution
A method that switches connections between a processor, a first bus, and a second bus within a display device to transmit commands directly between master and slave devices, allowing for command transmission without a PC connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a PC connection is used for time synchronization and command transmission, then reliable control is achieved, but system complexity and operational convenience deteriorate
Solution Approach 1:
The patent extracts the time synchronization and command transmission functions from the external PC system and implements them within the display device itself using internal oscillators and processors. This eliminates the need for continuous PC connection while maintaining reliable timekeeping and control capabilities.
Solution Approach 2:
The display device is equipped with internal timekeeping mechanisms and processing units that enable it to independently perform time synchronization and execute control commands without requiring external PC assistance, making the system self-sufficient for these critical functions.
2Ease of operation
If direct master-to-slave command transmission is implemented, then PC connection convenience is improved, but connection switching complexity increases
Solution Approach 1:
The patent combines the master and slave device connections into a single integrated communication interface. The same physical connection supports both master-to-slave command transmission and slave-to-master status reporting, eliminating the need for separate connection configurations.
Solution Approach 2:
The communication interface is designed to perform multiple functions: transmitting commands from master to slave, receiving status information from slave to master, and supporting time synchronization. This multi-functional interface reduces connection complexity while maintaining operational flexibility.
3Productivity
If IN port to IN port connection is used for master-to-slave communication, then direct command transmission is enabled, but PC connection capability is lost
Solution Approach 1:
The patent implements dynamic connection management where the display device can switch between different communication modes. The same interface can operate in master-to-slave direct transmission mode for efficient command execution, or switch to PC connection mode when external control is needed, providing adaptive versatility.
Solution Approach 2:
The processor acts as an intermediary that manages multiple communication channels. It can route commands and data between the master device, slave devices, and PC connection, allowing the system to maintain PC connectivity while enabling efficient direct master-to-slave communication when required.
Data Source
AI summary
A device configuring a multi-display system is disclosed. The device configuring the multi-display system includes a first interface unit providing an access path for access to another device, a second interface unit connected to the first interface unit through a first bus and a second bus, a processor transmitting a first command and receiving a second command, a TX line connecting the processor to `one of the first bus and the second bus` to transfer the first command, an RX line connecting the processor to `one of the first bus and the second bus` to transfer the second command, and a switch unit connecting the RX line and one of the first bus and the second bus, or connecting the TX line and one of the first bus and the second bus, wherein the processor controls the switch unit to respectively connect the RX line to the first bus and the TX line to the second bus or to respectively connect the RX line to the second bus and the TX line to the first bus.