Reflow soldering red light bead LED

Reflow soldering red lamp beads What are the effects of LED lamp beads on LED display 　　1, perspective 　　 The viewing angle of the LED display is determined by the viewing angle of the LED lamp beads. At present, most outdoor displays use elliptical LEDs with a horizontal viewing angle of 100° and a vertical viewing angle of 50°, while indoor displays use SMD LEDs with a horizontal and vertical viewing angle of 120°. The display screen on the highway generally uses 30° because of its particularity; a round LED with a viewing angle is sufficient. Some high-rise display screens have higher requirements for vertical viewing angles. Viewing angle and brightness are contradictory to each other, and a large viewing angle will inevitably reduce brightness. The choice of perspective needs to be determined according to the specific purpose LED lamp beads. 　　2, brightness 　　LED brightness is an important determinant of the brightness of the display. The higher the brightness of…