Screen Control System Command Transmission via Daisy Chain
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing screen control systems for large-scale splicing screens face challenges in transmitting command streams efficiently due to low-speed interfaces and bandwidth limitations, leading to increased time and costs, especially as the number of light boxes grows with higher resolution demands.
Innovation Solution
A screen control system that integrates command streams and video data in a high-speed transmission interface using a daisy chain configuration of serial units, where each unit is connected through forward and feedback channels, allowing for rapid command transmission and reducing circuit costs by eliminating redundant I/O pins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a low-speed interface is used to forward the command stream, then the system is simpler to implement, but the command transmission speed is slow and requires a long delivery time
Solution Approach 1:
The patent merges the command stream and video data into a single high-speed transmission interface. The source controller transmits both command streams and video data through the same high-speed interface to serial units, eliminating the need for separate low-speed command interfaces and significantly accelerating command transmission speed
2Device complexity
If a bus connected between all light boxes is used to forward the command stream, then the system structure is simplified, but the long physical bus length causes large capacitive and resistive loads that limit transmission speed
Solution Approach 1:
The patent segments the command transmission path by distributing commands through individual serial connections from the source controller to each serial unit, rather than using a single long bus. This segmentation reduces the effective transmission distance and electrical load on each connection, enabling faster command delivery across large-scale splicing screens
3Productivity
If Ethernet is used to transmit the command stream and video data, then the transmission capability is sufficient, but a great number of cables and I/O pins are required which increases system costs
Solution Approach 1:
The patent makes the high-speed transmission interface universal by using it for both command stream and video data transmission simultaneously. This multi-functional approach eliminates the need for separate Ethernet cables and I/O pins for command transmission, reducing cable quantity and system costs while maintaining sufficient transmission capability
4Manufacturing precision
If the number of light boxes increases to achieve high resolution and large scale, then the screen quality is improved, but more time is required to perform command transmission and parameter setting
Solution Approach 1:
The patent changes the transmission speed parameter by using a high-speed interface instead of low-speed interfaces for command transmission. This parameter change enables rapid configuration and control of a large number of serial units, allowing high-resolution large-scale splicing screens to be configured and controlled without excessive time delays
Data Source
AI summary
A screen control system includes a source controller, a plurality of serial units and a plurality of forward channels. The plurality of serial units are coupled in series, coupled to the source controller, and configured to control a display screen. Each of the plurality of forward channels is coupled between two of the plurality of serial units or between one of the plurality of serial units and the source controller, configured to forward a video data and a command to the plurality of serial units from the source controller. The plurality of forward channels couple the source controller with the plurality of serial units to form a closed loop.