In the installation of led display and the use of led display process which will always be a different signal, the equivalent of led display unique language, if you can figure out some of these signals, then read the led display it becomes very Of the easy, the following we come to a specific look at the specific signal led often.
1.OE enable signal: the whole screen control of the signal, but also often used for the whole screen blanking, we only need to master this enable signal, adjust its duty cycle, we can control the brightness of the free Bigger. When this signal is abnormal, led display screen will appear off or dark phenomenon occurred.
2.ABCD line signal: this kind of signal only in the dynamic scanning time will exist, ABCD is actually a binary number of code, A is the lowest bit, if we use binary identification ABCD line signal control the maximum range that is 16 lines 1. If this signal is abnormal, then the led display screen image will appear overlap, highlight or show the dislocation of the situation.
3.CLK clock signal: shift pulse provided to the shift register, each pulse signal will cause the data to move out or into a bit. Data on the data port must be coordinated with the signal to be able to normally send the data we want to send, the frequency of the data signal must also be half of the clock signal. When the signal appears a time, led display will appear full version of the case of chaotic display.