Now many public places are equipped with LED display, but do you know the function of LED full-color display driving IC? If you don’t understand it, just go and have a look! LED full color display driving IC function and function in LED full color display
Now many public places are equipped with LED display, but do you know the function of LED full-color display driving IC? If you don’t understand it, just go and have a look!
Function and function of LED full color display driving IC
In the work of LED full-color display, the function of driving IC is to receive the display data (from the receiving card or video processor and other information sources) in accordance with the protocol, internally produce PWM and current time change, and output PWM current related to brightness and gray refresh to light the LED. The peripheral IC composed of driver IC, logic IC and MOS switch acts on the display function of LED full-color display screen and determines the display effect.
LED driver chip classification
The so-called general chip is not designed for LED, but some logic chips with some logic functions of LED full-color display (such as serial 2 parallel shift register).
The special chip refers to the driver chip specially designed for LED full-color display screen according to the LED luminous characteristics. LED is a current characteristic device, that is, under the premise of saturated conduction, its brightness changes with the change of current, rather than by adjusting the voltage at both ends. Therefore, one of the characteristics of special chip is to provide constant current source. Constant current source can ensure the stable driving of LED and eliminate the flicker phenomenon of LED, which is the premise of high-quality display of LED full-color display. Some special chips also add some special functions to meet the requirements of different industries, such as LED error detection, current gain control and current correction.
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