In the practical application of ultra-long strip screens, in order to maximize the functions of the receiving card, multiple connections are often used, which not only improves the display effect, but also reduces the equipment cost.
So how does the receiving card realize multiple connections? The editor will give you a detailed explanation of the multi-open control scheme.
1. Multiple introductions and applications
More introductions
Multi-opening refers to the fact that only half or less than half of the height of a receiving card is used to load the interface, and then the remaining interface is used as the width to load, and the idle interface is used to improve the display effect and reduce the number of receiving cards.
As shown in the figure below, it is a schematic diagram of two-way and three-way cable connections (viewing the screen from the front):
Example: such as a P2.5 display screen, the resolution of a single module is 128*64, the entire screen is 12 long and 3 high.
1. According to the conventional load, 1 receiving card carries 3 modules, 12 R512T receiving cards are required, each receiving card uses 3 cable interfaces, and 9 cable interfaces are idle;
software settings
Software settings: Take the above case as an example, the software connection settings and multi-open settings are as follows:
2. Asymmetric multi-open introduction
Asymmetric multi-opening
For example, the number of regional modules loaded on one receiving card is 5. When using two-opening connection, one side has a width of 3 modules, and the other side has a width of 2 modules. This is asymmetric multi-opening.
Viewing the screen from the front: the width of the modules loaded on the right side of the asymmetric multi-open cable connection sequence is smaller than the width of the modules loaded on the left (that is, the column with the smallest number of widths loaded is placed on the far right).
Example: P5 display screen, single module resolution 64*32, length 5, height 3, only one R512T is used for loading, using asymmetrical two-way and asymmetrical three-way wiring as follows:
1. Schematic diagram of asymmetric two-way connection (as shown below), 1~3 ports carry 3 module widths on the left side, 4~6 ports carry 2 module widths on the right side, and a total of 6 cable ports are used.
2. Schematic diagram of asymmetrical three-way connection (as shown below), 1~3 ports carry 2 modules wide on the left, 4~6 ports carry 2 modules wide in the middle, 7~9 ports carry 1 module wide on the right , using a total of 9 cable interfaces.
In an asymmetric multi-open connection, because the width of the module loaded on the far right is less than that on the left, it is necessary to set the offset setting for the data group of the rightmost interface. Taking the above-mentioned asymmetrical dual-opening as an example, the 4~6 interface has one less module width than the 1~3 interface, so the data group of the 4~6 interface needs to be shifted to the left by 32 pixels.
In some applications, the multi-opening and loading method of the display screen can not only ensure the display effect, but also reduce the system cost, achieving both fish and bear's paws.
