I don't know much about the display screen, so let me tell you something about LED strip!

Light strips are generally divided into soft light strips and hard light strips.

Hard light bars are generally used in counters, such as jewelry counters, mobile phone display cabinets and other high-end products, mainly because of the colorful colors of hard light bars.

Soft light bands are used in many places. One is interior decoration, which can make many beautiful effects. If one is outdoor, the outline of the building frame is used more and looks better!

You said the difference between three lines and two lines:

LED light bars are divided into four types according to the internal arrangement of light bars: round double line, flat three line, flat four line and flat five line.

There are two cables in the LED strip of the second line, one is connected in series with the lamp bead, and the other is the live wire. So these two wires are divided into zero line and live line, which means that when connecting the plug, the two pins are not bright, just turn the two pins to 180 degrees and plug them in again.

There are three flat wires in the LED strip, two of which are connected in series with lamp beads, and these two wires are located on both sides. The one in the middle is the fire line. Therefore, the correct insertion method only needs to insert the pin at the wire. Unlike two-wire and four-wire connections, there are positive and negative points.

The LED lamp has four flat wires, three of which are connected in series with the lamp beads, and the middle one is the live wire. So the two lines in the middle are divided into zero line and live line, which means that it may not light up when the plug is connected. The solution is just to turn the four-pin plug to 180 degrees and plug it in.

The flat five-wire LED strip has five flat wires, four of which are connected in series with lamp beads, and these four wires are located on both sides. The one in the middle is the fire line. Therefore, the correct insertion method only needs to insert the pin at the wire. Unlike two-wire and four-wire connections, there are positive and negative points.

In addition, there are some basic knowledge, you can look at the reference materials I recommend to you, which also introduces the installation knowledge about led strip!

I hope it is useful to you, and don't forget to add points, if it is useful to you!