The LED display circuit board is generally composed of a light board and a driver board. At present, there are two design schemes on the market, one is the integration of the lamp driver, and the other is the separation of the lamp driver. Below we will mainly introduce the differences between these two schemes.
Combination of lamp driver: LED lamp and driver IC are all on one PCB, and the IC is on the front of the PCB, eliminating the need for copper strips.
Lamp driver separation: LED is on an independent PCB board, and the driver IC is on another PCB board. The two PCB boards are connected by pin headers and female headers.
Comparison of lamp driver integration and lamp driver separation:
1. From the cost point of view: the cost of the integration of the lamp and driver is slightly lower.
2. From the perspective of maintenance: the separate lamp driver is easy to maintain, because it can be replaced with each other for inspection, and the separate lamps of the lamp driver are grouped together, making it easy to replace the lamp.
3. From the perspective of heat dissipation, the separation of the lamp driver is more conducive to heat dissipation.
There are usually the following reasons for lamp driver separation:
First: The LED display uses plug-in LEDs, and the LED lamp pins affect the normal placement of the driver IC on the back, so the lamp driver separation method is adopted.
Second: The dot pitch of the LED screen is too small, which affects the wiring of the PCB board in the electronic design. The separation of the lamp driver can increase the wiring area of the PCB board.
Third: It is good for heat dissipation and does not affect the display effect of the LED. For example, when the LED lamp density is high, the heat of the driver IC will be very high when the LED lamp density is high, and the heat of the driver IC will be directly affected by the PCB. To the LED light facing the IC, change the color of the LED light. This situation does not occur when the lamp driver is separated.
It is worth noting that generally indoor scanning screens (because of the small number of chips) use relatively more lamp drivers (cost savings), while outdoor LED displays usually adopt the form of separate lamp drivers to extend the screen effect and life.
