Outdoor led display structure

Abstract

The invention discloses an outdoor LED display screen structure, which comprises a plurality of LEDs, a printed circuit board and an LED driver chip, wherein a plurality of LEDs are electrically fixed on the printed circuit board, and the LED driver chip controls the current supplied to the LEDs value, the printed circuit board is an aluminum substrate printed circuit board, the LED is a mount-type LED with a metal plastic bracket and the bottom of the bracket has a heat sink, and the structure of the lamp driver is integrated, the structure of the outdoor LED display Good heat dissipation, good quality, wide viewing angle, long viewing distance and long service life.

Description

technical field [0001] The invention relates to an improvement of the structure of an outdoor LED display screen, in particular to an outdoor LED display screen with good heat dissipation, good quality, wide viewing angle, long viewing distance and long service life. Background technique [0002] LED——Light Emitting Diode, that is, light-emitting diode, is a semiconductor solid light-emitting device. It uses a solid semiconductor chip as a light-emitting material. When a forward voltage is applied to both ends, the carriers in the semiconductor recombine to cause photon emission. produce light. LEDs can directly emit red, yellow, blue, green, blue, orange, purple, and white light. [0003] Printed circuit board——PCB (Printed Circuie Board), usually on an insulating substrate, according to a predetermined design, is made into a printed circuit, a printed component, or a combination of the two. [0004] Constant current driver IC—Constant Current IC refers to the current val...

AI Technical Summary

Problems solved by technology

[0011] D. Since the circuit board adopts FR-4 resin substrate, and the LED uses LAMP LED, due to the limitation of heat dissipation, large chips cannot be packaged, so that the brightness cannot be viewed at a long distance (more than 200 meters), and the brightness of the unit board Only about 6000MCD;

[0012] E. Because the circuit board adopts FR-4 resin substrate, and the LED uses LAMP LED, the heat dissipation is not good, which makes the aging light decay of the LED obvious. Generally, the aging light decay is about 5% after 1000 hours, which limits the service life of the product. ;

[0013] F. Since the LED is a LAMP LED, which is a plug-in type, considering the influence of the LAMP LED lamp pin on the LED driver chip on the back and heat dissipation and other factors, the separation method of the lamp driver is generally adopted, that is, the LED is on an independent circuit board, and the LED driver The chip is on another circuit, there are many connectors, and the yield rate in the process is low

Images