1. According to light emitting tube color component

Press the arc tube light color points can be divided into red, orange, green (subdivided green, standard green and pure green), Blu-ray, etc. In addition, some of the light emitting diode included in two or three colors of chips.

The LED light at the doped or undoped scattering agent, colored or colorless, the above-described various colors of light-emitting diodes can also be divided into colored transparent, colorless and transparent, colored and colorless scattering four types of scattering. Scattering-type light-emitting diodes and LEDs use up to do.

2. Press the arc tube features a smooth points

Press the arc tube features a smooth sub-round lights, side lights, rectangular, surface-emitting tube, lateral pipe, surface mount miniature tubes. Divided by diameter circular lamp φ2mm, φ4.4mm, φ5mm, φ8mm, φ10mm and φ20mm other foreign φ3mm usually referred to as a light emitting diode T-1;. Φ5mm of the mind as T-1 (3/4); the φ4.4mm is designated as T-1 (1/4).

From the half-circular angular size can be estimated from the luminous intensity angle distribution of luminous intensity distribution angle to be divided into three categories:

(1) high directivity. Generally pointed epoxy encapsulated, or packaged with a metal reflector cavity, without adding scattering agent. Half-value angle of 5 ° ~ 20 ° or less, with high directivity, can be used for local lighting or light detector linked to form an automatic detection system.

(2) standard usually used for light, its half-value angle of 20 ° ~ 45 °.

(3) scattering type. This indicator is larger perspective, half-value angle of 45 ° ~ 90 ° or more, a large amount of scattering agent.

3. The structure is divided by light-emitting diodes

By light-emitting diode structure is divided with a full epoxy encapsulated metal base epoxy encapsulation, epoxy package ceramic base and glass packaging, and other structures.

4. According to light intensity and operating current points

According to light intensity and operating current, there are common brightness LED (light-emitting intensity <10mcd); ultra-high brightness LED (light-emitting intensity> 100mcd);. The luminous intensity between 10 ~ 100mcd called high-brightness light-emitting diode LED general work in more than a dozen to a few mA current mA, low current LED operating current 2mA or less (the same brightness and ordinary luminous tube).

In addition to the above classification, there is a chip material classification and functional classification method.