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? ? ?The classification of LED lamp lighting includes classification by method type, classification by light type, and classification by light type. The types of LED lights used in different lighting fields are also different, and their uses are also different. The application of LED lamps in the appropriate lighting field can give play to their biggest advantages. The following analyzes the types of LED lamps in detail:

I. Classification by Type

Direct LED lighting: Direct lighting refers to the fact that 90% -100% of the luminous flux reaches the assumed working surface after the light is emitted through the lamp. Status is mainly used in the workplace.

Semi-direct LED lighting: Semi-direct lighting refers to covering the upper part of the light source with a cover made of translucent material, so that more than 60% -90% of the light is focused on the work surface. In addition, there will be 10% -40 of the cover light The proportion of% diffuses upward after being diffused by the translucent lampshade. The light produced by this lighting method is relatively soft, and the upward diffused light can increase the sense of space in the building.

Indirect LED lighting: Indirect lighting refers to the lighting method of indirect light generated by shielding the light source. 90% -100% of the luminous flux is reflected on the working surface through the reflection of the ceiling or the wall, and the remaining less than 10% of the light is Direct light on the work surface. Generally speaking, this

Lighting methods can only achieve special artistic effects when used in conjunction with other lighting methods.

Semi-indirect LED lighting: Compared to the semi-direct lighting method, the semi-indirect lighting method is a completely opposite lighting method. Specifically, a translucent lampshade is installed under the light source, so that more than 60% of the light is directed to the flat top. , Thereby forming an indirect light source, and the remaining 10% -40% of the light diffuses downward through the lampshade. This method can produce a more obvious lighting effect, and make the lower and lower rooms have a certain sense of heightening.

Diffuse LED lighting: Diffuse lighting refers to the use of the refraction function of the lamp to control the glare, so as to diffuse the light to the surroundings. There are basically two forms of this kind of lighting. One is that the light is emitted from the upper mouth of the lampshade and reflected by the flat roof. The two sides diffuse from the translucent lampshade and the lower part diffuses from the grille. The other is to use a translucent lampshade to completely block the light and produce diffusion.

Two, according to the type of Ming: there are overall LED lighting, key LED lighting, auxiliary LED lighting, hierarchical lighting, three-dimensional LED lighting, decorative LED lighting.

3. According to the color of the light-emitting tube: According to the color of the light-emitting tube, it can be divided into red, orange, green (also subdivided into yellow-green, standard green and pure green), blue light, etc. In addition, some light-emitting diodes include two types Or three-color chips. According to the light emitting diodes with or without a scattering agent, colored or colorless, the above-mentioned light-emitting diodes of various colors can also be divided into four types: colored transparent, colorless transparent, colored scattering, and colorless scattering. . Diffuse light-emitting diodes are used as indicator lights.

4. According to the characteristics of the light-emitting surface of the light-emitting tube: According to the characteristics of the light-emitting surface of the light-emitting tube, it is divided into round lights, square lights, rectangles, surface light-emitting tubes, side tubes, and surface-mounted micro tubes. The angular distribution of circular luminous intensity can be estimated from the half-value angle. There are three types of luminous intensity angular distribution:

(1) High directivity. Generally, it is a pointed epoxy package or a package with a metal reflection cavity, without the addition of a scattering agent. The half-value angle is 5 ° ～ 20 ° or less. It has 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 with a large viewing angle. The half-value angle is 45 ° ～ 90 ° or more, and the amount of diffusing agent is large.

Fifth, according to the structure of the light-emitting diode: According to the structure of the light-emitting diode, it is divided into full epoxy encapsulation, metal base epoxy packaging, ceramic base epoxy packaging, and glass packaging.

6. According to luminous intensity and working current: according to luminous intensity and working current, there are LEDs with ordinary brightness (luminous intensity <10mcd); ultra-high-brightness LED (luminous intensity> 100mcd); It is called high-brightness light-emitting diode. Generally, the working current of LED is more than ten mA to dozens of mA, and the working current of low-current LED is less than 2mA (the brightness is the same as that of ordinary light-emitting tube).