1. LED lights are divided according to the luminous color of the luminous tube
According to the luminous color of the luminous tube, it can be divided into red, orange, green (subdivided into yellow-green, standard green and pure green), blue light and so on. In addition, some light-emitting diodes contain chips of two or three colors.
According to the light-emitting diodes doped or not doped with scattering agents, colored or colorless, the above-mentioned light-emitting diodes of various colors can be divided into four types: colored and transparent, colorless and transparent, colored scattering and colorless scattering. Scattering light-emitting diodes and up to be used as indicator lights.
2. LED lights are classified according to the characteristics of the light-emitting surface of the luminous tube
According to the characteristics of the light emitting surface of the luminous tube, it can be divided into round lamps, square lamps, rectangular, surface luminous tubes, lateral tubes, and microtubes for surface mounting. Round lamps are divided into φ2mm, φ4.4mm, φ5mm, φ8mm, φ10mm and φ20mm according to their diameters. In foreign countries, light-emitting diodes with φ3mm are usually referred to as T-1; those with φ5mm as T-1 (3/4); and those with φ4.4mm as T-1 (1/4).
The angular distribution of circular luminous intensity can be estimated from the half-value angle.
There are three categories from the angular distribution of luminous intensity:
(1) High directivity. Generally, it is a pointed epoxy package, or a package with a metal reflective cavity, and no scattering agent is added. The half-value angle is 5°-20° or less, with high directivity, and can be used as a local illumination light 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 larger viewing angle, the half-value angle is 45° to 90° or more, and the amount of scattering agent is larger.
3. according to the structure of light-emitting diodes
According to the structure of light-emitting diodes, there are full epoxy encapsulation, metal base epoxy encapsulation, ceramic base epoxy encapsulation, and glass encapsulation.
4. According to luminous intensity and working current
According to the luminous intensity and working current, there are ordinary brightness LEDs (luminous intensity 100mcd); the luminous intensity between 10-100mcd is called high-brightness LED. Generally, the working current of LEDs ranges from ten mA to tens of mA, while the working current of low-current LEDs is below 2 mA (the brightness is the same as that of ordinary light-emitting tubes).
Post time: Aug-11-2021 BACK