Daisy Chain Display ID Assignment via Parallel Segmentation
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Solution Overview
Problem
The time required to determine display IDs increases significantly as the number of connected display devices grows, due to existing methods that rely on sequential interface opening and counting.
Innovation Solution
A network unit connected in a daisy chain manner between control computers and display devices, with storage units to store addresses and control units to compute and assign IDs based on received totals and stored addresses, allowing for parallel processing and independent ID determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If sequential interface opening and counting method is used to determine display IDs, then the determination process is simple to implement, but the time required increases significantly as the number of connected display devices increases
Solution Approach 1:
The patent segments the ID determination process by having each display device independently calculate its ID based on local information (number of addresses stored in storage unit) and global information (total number of display devices received from control computer). This parallel segmentation eliminates the sequential bottleneck while maintaining implementation simplicity through standardized local processing at each device.
Solution Approach 2:
The patent applies preliminary action by having display devices pre-store addresses of subsequent stage devices in their storage units before ID determination begins. This pre-captured information is then used in the parallel calculation phase, eliminating the need for sequential querying and reducing overall determination time while keeping the implementation straightforward.
2Device complexity
If sequential interface opening method is used, then the connection structure is simple, but the determination time increases with more display devices
Solution Approach 1:
The patent segments the ID determination task across all display devices simultaneously, with each device performing independent calculations based on stored address information. This parallel execution dramatically increases productivity while maintaining the simple daisy-chain connection structure, as no additional physical connections or complex routing are required.
Solution Approach 2:
Each display device serves itself by independently calculating its own ID using locally stored address information and the total device count received from the control computer. This self-service approach eliminates the need for centralized sequential assignment, boosting determination speed while keeping the connection structure simple and decentralized.
3Ease of operation
If interfaces are opened sequentially from the first stage, then the control flow is straightforward, but the time required for determination increases when more devices are connected
Solution Approach 1:
The patent applies preliminary action by having each display device pre-store the addresses of subsequent stage devices in its storage unit before the determination process begins. This pre-captured data enables parallel ID calculation across all devices simultaneously, dramatically reducing determination time while maintaining straightforward control flow through standardized local processing routines.
Solution Approach 2:
The patent segments the control flow by allowing each display device to independently execute ID determination using its stored address information and the total device count. This segmentation transforms the single-threaded sequential control into parallel independent control units, reducing determination time while keeping each individual control flow simple and straightforward.
Data Source
AI summary
A display device includes a network unit including a first port that is connectable to a control computer or a display device on a prior stage in a daisy chain manner and a second port that is connectable to a display device on a subsequent stage in the daisy chain manner, and a storage unit that stores addresses of display devices, as transmission sources, transmitted from one or each of the display devices at subsequent stages of a daisy chain connected via the second port in response to a request to search for a plurality of display devices as targets for determining display device IDs thereof the plurality of display devices being connected to the control computer in the daisy chain manner, the request being transmitted from the control computer to the plurality of display devices, where the addresses are received by the network unit.