YUANNENGJI SMD LEDs are widely used in daily life and are usually used for lighting. Many people have no idea how to determine the positive and negative poles of SMD LEDs.
SMD LED-Distribution
In generale, SMD LED manufacturers use red, green and blue when producing SMD LED displays. According to the different distribution positions of SMD LEDs, they can be divided into high-directional SMD LEDs, standard SMD LEDs and scattered SMD LEDs. High directivity is a pointed epoxy package or a package with a metal reflective cavity without any scattering agent. It has strong directivity and can be used as a local lighting source.
The standard type is usually used as an indicator light, e il suo angolo a metà valore è tra 20° e 45°. Il tipo diffuso significa che l'angolo di visione della spia è più ampio, e l'angolo a metà valore è tra 45° e 90° o più grande.
SMD LED-Features
I LED SMD sono suddivisi in LED a luminosità ordinaria in base all'intensità luminosa e alla corrente di lavoro, e quelli con intensità luminosa tra 10-100 mcd sono chiamati LED SMD ad alta luminosità.
La corrente di lavoro dei chip SMD comuni va da decine di mA a decine di mA, e la corrente di lavoro dei chip a bassa corrente è inferiore a 2 mA. I chip SMD hanno i vantaggi di dimensioni ridotte, lunga durata, basso consumo energetico, alta luminosità, rispetto per l'ambiente, adatti alla produzione in serie, durevoli e affidabili, velocità di risposta rapida, risparmio energetico, resistenza agli urti, antishock, alta risoluzione, forte progettabilità, ecc. durante l'uso, and are widely used in the current industrial field.
SMD LED-color classification
With the development of society, the application of SMD LED is becoming more and more extensive, which makes the types, styles and performance of SMD LED continue to increase. According to SMD LED, it can be divided into: orange, rosso, verde, yellow-green, pure green, standard green, blue light, white light and other different types. Some SMD LEDs also contain chips of two or three colors.
According to whether the light-emitting diode is doped with scattering agent, colorless or colored, SMD LEDs can be divided into four types: colorless transparent, colored transparent, colored scattering, and colorless scattering.
SMD LED-positive and negative identification SMD LED positive and negative identification is particularly important, and the brightness of the lamp depends entirely on the SMD LED. How to identify the positive and negative poles of SMD LEDs: Observation method: look down, one side of the colored line is the negative pole, and the other side is the positive pole; large-sized LEDs will have some marks near the poles, such as cutting corners, spray painting, or different pin sizes, generally with markings, small and short pins are negative poles; small-sized 0805 e 0603 packages have a T-shaped or inverted triangle symbol on the bottom, the horizontal T is the positive pole; the side of the triangle symbol is close to the positive pole, and the corner is close to the negative pole.