(1) CLK órajel
The shift pulse provided to the shift register, each pulse will cause the data to be shifted in or out of one bit. The data on the data port must be coordinated with the clock signal to transmit data normally, and 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, it will make the whole board display disorderly.
(2) STB reteszelő jel
The data in the shift register is sent to the latch, and the data content is displayed through the driving circuit to light up the led. But because the drive circuit is controlled by the EN enable signal, the prerequisite for its lighting must be that the enable is turned on. The latch signal also needs to be coordinated with the clock signal to display a complete image. In any case, when there is an abnormality in the latched signal, the entire board will be displayed in a disorderly manner.
(3) EN engedélyezési jel
The entire screen brightness control signal is also used for screen blanking. Just adjust its duty cycle to control the change of brightness. When the enable signal is abnormal, the entire screen will appear dark, dark, or tailing.
(4) Adatjel
Provide the data needed to display the image. It must be coordinated with the clock signal to transmit the data to any display point. Generally, the red, green and blue data signals are separated in the display screen. If a data signal is short-circuited to the positive or negative pole, the corresponding color will appear full or not bright. When the data signal is suspended, the corresponding color will be displayed. The situation is uncertain.
(5) ABCD vonaljel
It only exists in dynamic scan display. ABCD is actually a binary number, and A is the low bit. If the control range of ABCD signal is 16 lines (1111) in binary, only AB signal is enough in 1/4 scan, because AB signal Indicates that the range is 4 rows (11). When the line control signal is abnormal, there will be display misalignment, highlighting or overlapping images.
