Introduction to the design scheme of LED display circuit board

In terms of LED display circuit board, it is generally composed of light board and drive board. At present, there are two design schemes on the market, one is the combination of lamp drive and the other is the separation of lamp drive. Let's introduce the differences between the two schemes.

Lamp driving in one: LED lamp and driving IC are all on one PCB, and IC is on the front of PCB, eliminating copper bar insertion.

Lamp driver separation: the LED is on an independent PCB board, and the driving IC is on another PCB board. The signal connection between the two PCB boards is carried out by inserting the row pin and row bus.

Comparison between lamp drive integration and lamp drive separation:

1. From the perspective of cost: the cost of lamp drive in one is slightly lower

2. From the perspective of maintenance: the separation of lamp drivers is easy to maintain, because they can be replaced with each other for detection. In addition, the separation of lamp drivers and the centralization of lamps make it easy to replace lamps.

3. From the perspective of heat dissipation, the separation of lamp drive is more conducive to heat dissipation.

Introduction to the design scheme of LED display circuit board

Lamp drive separation is usually used for the following reasons:

First: the LED display adopts the plug-in led, and the lamp foot of the LED affects the normal placement of the back drive IC, so the lamp drive separation method is adopted

Second: the distance between LED screen points is too small, which affects the wiring of PCB board in electronic design. The wiring area of PCB board can be increased by separating lamp driver

Third: it is conducive to heat dissipation without affecting the display effect of LED. For example, when the LED lamp density is very high, the heat of driving IC will be very high. At this time, the heat of driving IC will directly affect the LED lamp facing the IC through PCB, so as to change the color of LED lamp. This will not happen with lamp drive separation.

It is worth noting that generally, the indoor scanning screen (due to the small number of chips) uses more lamp drivers (cost saving), while the outdoor LED display screen usually adopts the form of lamp driver separation to prolong the screen effect and service life.