Do you really know the five common signals of LED displays

Time:2018-10-13 Views:215

What signals do LED displays transmit, do you know?The commonly used signals of LED display include CLK clock signal, STB latching signal, EN enable signal, data signal, ABCD line signal, etc. Let me show you some information about it.

CLK clock signal: the shift pulse provided to the shift register, each of which will cause the data to be moved in or out of one bit. The data on the data port must be coordinated with the clock signal for the normal transmission of data, and the frequency of the data signal must be one half of the frequency of the clock signal.In any case, when there is an abnormality in zhong xin 1, the board will be disordered.

STB latch signal: the data in the shift register is sent to the latch, and its data content is displayed by lighting LED through the drive circuit.However, since the drive circuit is controlled by the EN enable signal, the premise of its lighting must be that it can "start" the state. The latch signal also needs to coordinate with the clock signal to show a complete image. In any case, when the latch signal is abnormal, the panel will be disordered.

EN enable signal: full-screen brightness control signal, also used for screen blanking.The brightness can be controlled by adjusting its duty cycle.When the energy signal is abnormal, the whole screen will appear bright, dark or trailing.

Data signal: provide the data needed for the display image.Must be coordinated with the clock signal to transmit 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 pole or negative pole, the corresponding color will appear full or not. When the data signal is empty, the corresponding color will display in a variable manner.

5. ABCD line signal: only when the dynamic scanning sensor is present, ABCD is actually binary number, A is the lowest position. If the signal control address of ABCD is represented by binary, fan tian is 16 lines (1111).When the line control signal is abnormal, the display will be out of place, highlighted or the image overlapped.