(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 smaller, the rectifier bridge has a high directivity, which can be used as part of the illumination light source, or used with a light detector to form an automatic detection system.

(2) Standard type. It is generally used as an indicator light, and its half-value angle is 20. ~45.

(3) Scattering type. This is an indicator with a larger viewing angle, with a half-value angle of 45. , 90. or larger, the amount of scattering agent is larger.

In-line LED lamp beads tell you a few tips for choosing lamp beads

There are many in-line LED lamp beads on the market, so how to choose a high-quality LED lamp bead? Besides the chip, what still affects the quality of the LED lamp bead?