Usually, we in a certain display area, while the number of lines lit and the proportion of the total number of rows, known as the scan mode.
We have an outdoor surface paste S8 (1/4 sweep) products as an example:
Under normal circumstances, when lit this product, we see the naked eye, it is the beginning of the whole board together with the light up. If we look at it from its work program, it is not, it is 4 times light, every time there are four lines together. Due to the relationship between the naked eye to watch, so give us a mistaken that it is the same with the whole board light illusion. This kind of phenomenon, called the 1/4 scan mode.
Now on the market, LED display scanning methods are static scanning and dynamic scanning two.
How do I understand static scans and dynamic scans?
In general, from the driver IC output pin to the pixel between the implementation of "point to point" control, this is called static scanning, the implementation of "point to column" control called dynamic scanning;
simply speaking,
Static scanning of the product, it does not need to control the circuit; and dynamic scanning of the product, it is necessary to line control circuit, which we can from the driver board is very intuitive to see.
Among them, the static scanning of the product, its cost is higher, but the overall display and product stability is better, and the brightness loss is relatively small; and dynamic scanning of the product, it needs to control the circuit, although its product cost is low , But the overall display is relatively static, it is worse, and the loss of brightness will be relatively large.