1. CLK clock signal: the shift pulse provided to the shift register, each pulse will cause data to be shifted in or out by 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 the clock signal 1/2 times the frequency. In any case, when the clock signal is abnormal, the display of the entire board will be messy. We have Call Indicator Screen for sale, which is also a kind of call indicator transparent display screen.
2. STB latch signal: Send the data in the shift register to the latch, and display the data content by lighting the LED through the drive circuit. However, since the drive circuit is controlled by the EN enable signal, the premise of its lighting must be the enabling state. The latch signal also needs to be coordinated with the clock signal to display a complete image. In any case, when the latch signal is abnormal, it will make the board display messy.
3. EN enable signal: the brightness control signal of the entire screen, also used for blanking of the display screen. As long as its duty cycle is adjusted, the brightness can be controlled. When the enable signal is abnormal, the whole screen will be off, dark or trailing.
4. Data signal: Provide the data needed to display the image. It must be coordinated with the clock signal to transfer data to any one of the display points. 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 be fully bright or not bright. When the data signal is empty, the corresponding color Display is variable. The current flexible and transparent LED screens all adopt the analog signal transmission method, and the digital models need to be converted into analog signals to be recognized on the screen.
5. ABCD line signal: It only exists when the dynamic scanning is sensitive. ABCD is actually a binary number, and A is the low bit. If the ABCD signal control address is expressed in binary, it is 16 lines (1111), and only in 1/4 scan The AB signal is fine, because the representation range of the AB signal is 4 lines (11). When the line control signal is abnormal, there will be phenomena such as display misalignment, highlighting or image overlapping. Generally, LED Transparent Displays with large spacing adopt static display, and some LED Transparent Displays with small spacing adopt scanning. For example, JTS3 adopts 16-scan display.
The above are the common signal methods of LED Transparent Film Screen. If you want to know more, you can visit our website.
