first LED Downlights

 Row scanning circuit constituted by a decoder , progressive scan signal . Starting from the first  LED Downlights line , according to the order for each line to be scanned. Once the row strobe , corresponding pixel on the line can be illuminated by the column drive signals . When the end of a line scan duration , the next line is displayed in the same way . 1/ 16 scan mode , that is , after the 16- line swept again , and from the first line scan of the next cycle .

LED Module

Screen refresh rate related to the screen display is good or bad , from the perspective of data update , scan clock frequency is higher , leaving less time data updates , the system is not conducive to refresh ; scan clock frequency is lower , the more time scanning long , will cause screen flicker . In general, the refresh rate is not lower than 50HZ ( frame rate ) , otherwise , it will produce the screen flicker.

2.2 The program flow control circuit  LED Flexi Strip

The main function of the host microcontroller to accept PC display data downloaded to the display screen body providing data and various control signals , software by the main program and interrupt service program composed of two parts , the main program is responsible for display, display data read out as required and generate the required control signals ; interrupt service routine to communicate with the host computer to solve problems ( see Figure 5,6 ) .