How many kinds of signals does the LED electronic screen have? I believe everyone is familiar with it, but do you know how LED electronic screens work? In fact, it mainly depends on its signal direction. Then, how many kinds of signals does the LED electronic screen have? What is the effect of each signal? If you want to know, let's learn about it with Topsun Optoelectronics!

  Introduction to the effect of 5 kinds of signals of LED electronic screen

  The LED electronic screen is composed of three parts: data acquisition system, control system, and display system. The direction of the data signal is: peripherals-computer-DVI graphics card-data sending card-data receiving card-HUB adapter board-display screen.

  The HUB adapter board is the final link of data transmission, and all signals can be found on the HUB adapter board. The HUB adapter board is a card board that divides the signal announced by the control board into several branches, also called a breakout board. Under normal circumstances, it is determined based on the vertical number of LED electronic screen modules.

  The various signals contained in the LED electronic screen. The signal starts from the HUB board and connects to the unit board or the module through the cable to complete the data transmission. Except for the serial transmission of data signals, all other signals are transmitted in parallel. Now analyze the various signal effects as follows.

  CLK clock signal

  The shift pulses supplied 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 in harmony with the clock signal to transfer data normally, and the frequency of the data signal must be 1/2 times the frequency of the clock signal. When the clock signal is abnormal, it will make the whole board display messy.

  STB latch signal

  When one data transmission is over, the STB latch signal is useful, latch the data in the shift register, and display its data content through the drive circuit to light up the LED.

  The condition for its lighting must be to enable the open state. In any situation, when the latch signal is abnormal, it will make the whole board display messy.

  EN enable signal

 The LED electronic 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.

  Color data signal

  Provide the data required to display the image. It is necessary to be in harmony with the clock signal to transmit data to any display point. Generally, do not leave the red, green and blue data signals in the display screen. If a data signal is short-circuited to the positive electrode or the negative electrode, the corresponding color will be fully bright or not bright.

  ABCD line signal

  It only exists in dynamic scan display. A is the lowest bit. If the ABCD signal is used to indicate that the maximum scale of the ABCD signal is 16 lines (0000-1111), only the AB signal is required in 1/4 scan, because the AB signal indicates The scale is 4 rows (00-11). When the line control signal is abnormal, there will be phenomena such as display misalignment, highlighting or image stacking.