What are the display options for LED roll-up screens?

  LED roller shutter screen structure design novel, roller shutter screen up and down, left and right can be bent at will, to achieve different shape changes, therefore, making the LED roller shutter screen is more and more widely used, the development of technology is also more and more advanced. However, according to the different needs of the application, the LED roller shutter screen display mode is also different. Then you knowLED roll-up screenThe display of which there are several kinds? The following Vishay technology editorial for your introduction:

  The LED roll-up screen has the following display options:

  1, LED roll-up screen static display mode

  LED roller shutter screen static display means that when the full-color LED roller shutter screen displays a certain character, the corresponding light-emitting diode will appear in two forms of constant conduction or constant cutoff. This display requires that the common terminal of each display block is constantly grounded or connected to a positive power supply. Each display block of 8 segment selection line with an 8-bit parallel I / O port of the 8-bit line, I / O port as long as there is a segment code output, the corresponding character that is approved out, and keep the small change until the I / O output of the new segment code.

  In its use of static display mode, the smaller current can get a very high brightness, and it takes up less CPU time, programming is also very easy, but due to each LED roller shutter screen should be equipped with a parallel output port, thus taking up a lot of I / O port resources, thus also improving the cost of hardware, so this way in reality when the number of bits is more is not a very good choice! Program.

  2、Dynamic display mode of LED roll-up screen

  For the dynamic display of the way, is a one by one to take turns to light up all the displays, according to this way of lighting up the display by imitation is called bit scanning. And this way of displaying the requirements of the LED roller shutter screen segment selection line is connected in parallel, mainly by an 8-bit I / O port control; and all the bit selection line is controlled by another I / O port line.

  The way in the display, the monitors take turns to elect through, to make it stable display, it must be used in a scanning way, that is to say, at a certain moment, we only elect through a monitor, and send than the corresponding paragraph code, for the appropriate delay (probably also on the delay time of about 1-5ms), then elect through another monitor, and will send the corresponding paragraph code, so the cycle repeats, you can make the LED roller shutter screen display the corresponding characters. Segment code, so the cycle is repeated, then you can make the LED roller shutter screen display the corresponding characters. If you can ensure that the cycle of time is short enough, then you can use the human eye's visual retention effect, to achieve a sense of display.

  In summary, we can see that the LED roller shutter screen display mainly has static display mode and dynamic display mode two ways, in the process of practical application, you can choose the appropriate display mode according to need.