The problems of LED display driver chips:Ī mainstream 16-bit steady state current LED display driver chip can only drive 16 LED devices. The constant current source ensures stable LED driving and eliminates LED flicker. Therefore, one of the biggest features of a dedicated chip is to provide a constant current source.
Some special chips also add special features for different industry requirements such as LED error detection, current gain control, and current correction.īecause led is a current characteristics device, that is, under the premise of saturation conduction, its brightness changes with the change of the current size, not with the change of the voltage across it. The constant current source can ensure the stable driving of the LED and eliminate the flickering phenomenon of the LED, which is a prerequisite for the LED display to display a high-quality picture. Therefore, one of the biggest characteristics of a special chip is to provide a constant current source. LED is a current characteristic device, that is, under the premise of saturation conduction, its brightness changes with the change of the current, rather than by adjusting the voltage across it. The special chip refers to the driver chip designed specifically for the LED display according to the LED light emitting characteristics. The so-called general-purpose chip, the chip itself is not designed specifically for the LED, but some logic chips with a led display part of the logic function. The classification of the driver IC: led display driver chip can be divided into two kinds of general-purpose chips and special chips. Driver ICs, logic ICs, and peripheral ICs composed of MOS switches work together to display the functions of the LED display and determine the display effect it presents. The role of the driver IC: Receiving display data (from the receiving card or video processor and other information sources) in accordance with the protocol, produce PWM and current time changes, output PWM current which has relation with LED display brightness, grayscale, refresh rate,etc prameters. The performance of the driver IC determines the effect of the led display screen, especially the use of modern large-scale activities and high-end venues, making people more stringent requirements for LED display driver IC. LED display driver IC is such a key component, it is like the central nervous system of the human brain, and it is in charge of the body's physical actions and the mental thinking of the brain.