LED Display Screen Luminous Materials:
1. LED Light-Emitting Diodes (i.e., through-hole LEDs): One or more single LEDs of different colors can form a basic pixel. Due to their high brightness, they are mostly used in outdoor display screens. Through-hole LED modules (where DIP-packaged LEDs have their pins inserted through the PCB board and soldered) have the advantages of high brightness and good heat dissipation, but the disadvantage of low pixel density.
2. LED Dot Matrix Modules: Composed of several light-emitting chips forming a light-emitting matrix, encapsulated in a plastic shell with epoxy resin. Suitable for row and column scanning drivers. Easily forms high-density display screens. Mostly used in indoor display screens. Chinese characters are typically 16*16 (minimum unit) dot matrix. That is, four modules can display one Chinese character.
3. Surface-Mount LED Light-Emitting Diodes (or SMD LEDs): This is a surface-mount soldering form of LED packaging. It can be used in indoor full-color display screens and allows for single-point maintenance. Effectively overcomes the mosaic phenomenon. Surface-mount modules (where SMT-packaged LEDs are soldered to the surface of the PCB board using a soldering process, without the pins passing through the PCB board) have the advantages of good display effect and high pixel density, suitable for indoor viewing; the disadvantages are insufficient brightness and insufficient heat dissipation of the LED itself.
(1) Surface-mount 3-in-1: Refers to three different colors of RGB LED chips packaged in SMT LEDs and arranged vertically side by side at a certain distance.
(2) Surface-mount 3-in-parallel: Refers to three independently packaged SMT LEDs of different colors arranged vertically side by side at a certain distance.
