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Meaning of LED display of different signals

Shenzhen Lights Technology Co.,Ltd | Updated: Apr 25, 2016
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EN enable signal: the entire screen brightness control signal is also used to display blanking. As long as adjust its duty cycle can control the brightness change. When the enable signal is abnormal, the entire screen will be not bright, dark, bright or trailing phenomenon.


ABCD line signal: only exists when the dynamic scan showed, ABCD is in fact a binary number, A is the lowest position, if the binary representation of ABCD signal control line maximum range is 16 (1111), 1/4 scan can be as long as AB signals because the scope of AB signal indicates that 4 lines (11). When the line control signal abnormal, there will show dislocation, highlight or image overlap and so on.

CLK clock signal: supplied to the shift register shift pulses, each pulse will cause data into or out of one. The data port on the normal transmission of data must be coordinated with the clock signal to the frequency of the data signal must be 1/2 times the frequency of the clock signal. In any case, when the clock signal is abnormal, the entire board will display disorganized.


Data signal: to provide a desired image display data. It must be coordinated with the clock signal to transfer data to any display point. Usually in the display RGB data signal separated from If a data signal is shorted to the positive or negative, then the corresponding color will appear full bright or not bright, when the data signal is dangling correspond to the color display It is uncertain.


STB latch signals: the shift register data is sent to the latch, and data content through the drive circuit lit LED display. However, since the driving circuit controlled by EN enable signal, which lit the premise must be enabled to open. Latch signal also need to coordinate with the clock signal to show the complete picture. In any case, when the latch signal is abnormal, the entire board will display disorganized.



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