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 display screens use more red, green and blue. As for the more used in lighting, it is a 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).
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