LED display board, the general is light board and driver board. There are currently two designs, one is light drive one, one is the lamp drive separation. In this issue, Xiao Bian give you explain what is light and what is drive one lamp drive separation.
Drive one lamp is LED lamp and driver IC all in one PCB board, IC in front of the PCB, eliminating the need for copper strip, the advantage is no inductive effect, not video. The disadvantage is that maintenance problems.
LED lamp drive separation is in a separate PCB board, driver IC and in another PCB board, PCB board is used between two rows of needle and Pai mother way to insert signal connections to achieve the purpose of working.
Commonly used lamp drive separation is because of the following reasons:
First: LED screen uses a plug-in LED, LED lights on the back foot affect normal display driver IC, and so the use of lamp drive separation method;
Second: LED dot pitch is too small to affect the alignment of the PCB in the electronic circuit design, the use of light flooding the way to increase the separation of PCB layout area.
Third: help heat without affecting the LED display, if the lamp drive one way, when the LED light density great time (that is, the dot pitch LED screen very young), the heat had driven IC at work It will be high, then the driver IC calories will directly affect the LED lamp is on the IC by PCB, the LED light changes color. Use lamp drive separation will not happen.
Drive one lamp and lamp drive separation between the two:
1, from the cost to see: lights drive one costs slightly lower.
2. From the maintenance point of view: lamp drive separation easier maintenance, because he could replace each other to detect, and lamp drive isolated light together, and it is easy to replace the lamp.
3, from the thermal point of view, is more conducive to heat lamp drive separation.
To sum up: Scan screen general indoor (because a small number of chips) with a lamp drive one relatively more (cost savings), while most have adopted outdoor lamp drive isolated form, in order to prolong the effect of screen body and life.