Taking Advantage of SnapDriveTM to Improve the LED Display Screen Quality

Full-color LED video display screen has become popular in recent years for various applications such as indoor / outdoor commercial advertisement, stadium billboards, traffic message signs ... etc. Thanks to the evolution of LED technology which enables lower cost, higher luminance, uniform wave -length and better efficacy LEDs available, the LED display screen makers are able to build high quality display screen with cheaper cost. With the advent of Full-HD video, the need for building higher resolution cree xsp series led street light screen supporting higher grayscale-level and higher refresh rate is continuously driving the LED display makers to upgrade their system specification. The improvement of LED display refresh rate and grayscale-level is associated with several electrical factors, including (1) the channel current output response rate (OE [note1] response rate ) of the LED driver, (2) the speed of system clock (DCLK) used to transmit pixel data from control board to the LED driver in a cascaded daisy chain, (3) the scanning methodology of the LED module board which usually is a trade-off between BOM cost and luminance degradation, (4) the transmission throughput to transmit display pixel data from the video control system to the LED display panels.


Conventional LED drivers with moderate OE response rate and DCLK can usually provides LED display makers just-enough performance to build a medium-class screen, by trading off display quality to gain system stability at reduced BOM cost and cheaper PCB design. Such LED drivers, however, fall short to meet the ever-growing pursuit for higher resolution, refresh rate and grayscale-level. As such, EnE Technology is rolling out a series of LED drivers with SnapDriveTM [note2] technology to address this demand. The SnapDriveTM technology expedites the LED driver's OE response rate and DCLK without having suffered the distortion of output current, while at the same time it also alleviates the heat dissipation of LED and hence prolongs the life-time of LED. By taking advantage of the SnapDriveTM drivers, system makers are now able to push the frontier of their design specification to embrace high quality video such like Full-HD.
[Note 1] OEis an input pin of the led street light wholesale used to enable / disable the output current driving of LEDs

For example, given an outdoor LED display screen constituted by 48 pieces of 16-channel driver IC in a single daisy chain, making the total number of channels in a single daisy-chain to be 48 * 16 = 768 (ie, Cas = 768 ). Assuming the panel is static driven (without scanning) with 2-bit / 4-step of brightness level adjustment.