1. In-line LED lamp beads are divided into: tower LED, round LED, cylindrical LED, square LED, oval LED, piranha LED, multi-color LED, wing-shaped foot LED, in-line white LED, assembly LED-like, etc.

2. SMD LED lamp beads are divided into: single-color SMD LED, single-color PLCC SMD LED, multi-color SMD LED, white light SMD LED, flip-chip LED, side-emitting SMD LED

Three, the digital tube display is divided into: seven-segment digital tube, SMD seven-segment digital tube, dot matrix, meter character digital tube, plane tube, graphic digital tube

Fourth, infrared reception is divided into: infrared emission tube, photodiode, phototransistor, infrared receiver, ambient light sensor