Classification methods of LED products

　　LED products can be divided in many different kinds. Let us simply look at the classification methods. According to different standards of classifications, LED light can be divided according to the light color emitted, light tube features, light tube structure, luminous intensity, operating current, the chip material, function and other standards. The following will give a brief outline of the six classification methods.

　　1, according to the light color emitted from the tube, it can be divided into red, orange, green (subdivided into yellow, standard green and pure green), blue and so on. Furthermore, some light emitting diodes comprises two or three kinds of colors of chips. According to the light emitting diode of the light scattering agent doped or not doped, colored or colorless, the color of the above may also be divided into four types of colored clear light emitting diode, colorless and transparent, colored scattering and colorless scattering.

　　2, the light emitting tube features a smooth glossy classified according to the characteristics of the light-emitting tube can be divided into round lights, side lights, rectangular, surface-emitting tube, lateral pipe, surface mount miniature tubes. Divided by the diameter of the circular lamp φ2mm, φ4.4mm, φ5mm, φ8mm, φ10mm and φ20mm so on. Global φ3mm usually referred to as a light emitting diode T-1; φ5mm of the mind as T-1 (3/4); φ4.4mm of the mind as T-1 (1/4). The half-value angle size can be estimated round luminous intensity angle distribution. From the luminous intensity distribution angle to be divided into three categories: (1) high directivity. General pointed epoxy package, or package with a metal reflector cavity, without adding scattering agent. Half-value angle of 5 ° ~ 20 ° or less, with high directivity, can be used as a local light source or the light detector associated to form an automatic detection system. (2) standard. Typically it is used for light, half-value angle of 20 ° ~ 45. (3) scattering type. This indicator is a larger perspective, the half value angle of 45 ° ~ 90 ° or greater, the larger the amount of scattering agent.

　　3, the light emitting diode can be divided according to the structure, which can be divided into full epoxy encapsulation, epoxy encapsulated base metal, ceramic and glass base epoxy encapsulated packaging.

　　4, according to the luminous intensity and operating current, it can be divided into ordinary brightness LED (light emitting intensity <10mcd), high-brightness LED (10 ~ 100mcd) and ultra-high brightness LED (light emitting intensity > 100mcd). The operating current of general LED is a few dozen mA, while the low-current LED current is 2mA or less (the same brightness and ordinary luminous tube).

　　5:  Divided according to the power: low-power LED (0.04-0.08W), medium power LED (0.1-0.5W) and high power LED (1-500W). With the continuous development of technology, LED power becomes bigger and bigger.

　　6: Divided according to the package: one is the SMD (SMT) and the other is DIP (DIP).