Classification of light-emitting diodes

There are many people who don't know how to classify LEDs. Some people are asking how to classify LEDs. Shenzhen LED manufacturer, Dawning for everyone to answer.

LED is actually a light-emitting diode. The specific name can be divided into many types:

1, according to the luminous color of the luminous tube

According to the color of the luminous tube, it can be divided into red, orange, green (subdivided into yellow-green, standard green and pure green), blue light, white light and so on. In addition, some LEDs contain chips of two or three colors.

The light-emitting diodes of the above various colors can be classified into four types of colored transparent, colorless transparent, colored scattering and colorless scattering according to whether the light-emitting diode is doped with or without a scattering agent, colored or colorless. Scatter-type LEDs are used for indicator lights.

In general, LED displays use more red, green, and blue. As for the more used in lighting, it is white LED.

2, according to the characteristics of the luminous surface of the luminous tube

According to the characteristics of the light-emitting surface of the light-emitting tube, the round lamp, the square lamp, the rectangular, the surface light-emitting tube, the lateral tube, the surface-mounted micro tube, and the like. The circular lamps are divided into φ2mm, φ4.4mm, φ5mm, φ8mm, φ10mm, and φ20mm according to the diameter. In foreign countries, a φ3 mm light-emitting diode is generally referred to as T-1; φ5 mm is referred to as T-1 (3/4); and φ4.4 mm is referred to as T-1 (1/4).

There are three types from the angular distribution of luminous intensity:

(1) High directivity. It is usually a pointed epoxy package or a metal reflective cavity package with no scattering agent. The half-value angle is 5°-20° or less, has high directivity, can be used as a local illumination source, or combined with a light detector to form an automatic detection system.

(2) Standard type. Usually used as indicator light, its half value angle is 20 ° ~ 45 °.

(3) Scattering type. This is an indicator light with a large viewing angle, the half value angle is 45° to 90° or more, and the amount of the scattering agent is large.

3, according to the structure of the LED

According to the structure of the light-emitting diode, there are structures such as a full epoxy encapsulation, a metal base epoxy package, a ceramic base epoxy package, and a glass package.

4, according to luminous intensity and working current

LEDs with ordinary brightness according to luminous intensity and working current (lighting intensity 100mcd); high-intensity light-emitting diodes with luminous intensity between 10 and 100mcd. Generally, the operating current of LEDs is between ten mA and tens of mA, while the operating current of low-current LEDs is below 2 mA (the brightness is the same as that of ordinary LEDs)