LED display of several common signal analysis

Introduce below five LED display common signal:

CLK the clock signal: provide to shift register shift pulse, each pulse will cause data or move out of a move. Data at the entrance of the data must be and the clock signal coordination to normal transmit data, data must be the frequency of the signal of the clock signal frequency 1/2 of The Times. In any case, when the clock signal had abnormal, will make the whole board shows that mess.

STB latch signal: will shift register within the data sent to the latches, and its data content through the driver circuit lit led to show out. But because the driver circuit that can signal control by EN, the light is the premise that must be for open. Lock to save signal may also need to coordinate with the clock signal to show the complete image. In any case, when lock to save the signals are abnormal, will make the whole board shows that mess.

EN can signal to the whole led screen brightness control signal, and can also be used to display vanish. As long as the adjustment of empty of it than can control the change of brightness. When that can signal appears unusual, the led screen will appear not bright, dark bright or trailing wait for a phenomenon.

A data signal led display image: provide the data they need. Must be with the clock signal coordination ability to send data to a point that any. General in red, green, blue led screen of the separate data signals, if a data signal to short-circuit the positive or negative, then the corresponding the color will appear the light or not bright, when data signal is impending color corresponding to the case when that decision.

The ABCD line signal: only in dynamic scan showed that only exists, the ABCD is actually A binary number, A position, if use binary is said the ABCD signal control maximum range is 16 line (1111), A quarter of the scanning as long as the AB signal, because the range is AB signal said four lines (11). When do the control signal appears unusual, will appear led display displacement and highlight the phenomenon such as image or overlap.