source:Industry Trends release time:2023-10-12 Hits: Popular:led screen wholesaler
Universal chips themselves are not specifically designed for LEDs, but some logic chips have the logic function of LED display.
A specialized chip is designed specifically for LED display drivers based on the luminous characteristics of LEDs. LED devices with current characteristics, that is, under the premise of saturated conduction, the brightness will change with the change of current, rather than by adjusting the voltage at both ends. Therefore, one of the characteristics of specialized chips is to provide constant current. Constant current can ensure the stability of LED driving and eliminate LED flicker, which is a prerequisite for high-quality LED display. Some specialized chips tailored to different industry requirements have also added some special functions, such as current correction with LED error detection and current gain control.
Drive the development of IC
In the 1990s, LED displays were applied on the basis of monochrome, using constant voltage drive ICs. In 1997, China experienced the first generation of LED display specific driver IC9701, with a grayscale range of 16 to 8192, achieving a WYSIWYG effect. Subsequently, the luminous characteristics of LED constant current drive became the choice for full color LED display drivers, while the more integrated 16 channel 8 channel drive replaced this driver. In the late 1990s, companies such as Toshiba from Japan, TI from the United States, and Sunrise from China successively launched 16 channel constant current LED driver chips. By the early 21st century, Taiwanese companies had also begun the production and use of driver chips. Now, in order to solve the PCB wiring problem of small pitch LED display screens, Riyuesheng has launched a highly integrated 32 scan 48 channel constant current LED driver chip.
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