Digital Addressable Pixel Led Refresh Frequency Algorithm
Time:2019-03-11
Views:2231
How to calculate the refresh frequency of digital led chips?
1. A general chips,such as : WS2815 led chips and GS8208 led chips which are the 256 gray levels, A pixel is ( R G B ) composed
1. A general chips,such as : WS2815 led chips and GS8208 led chips which are the 256 gray levels, A pixel is ( R G B ) composed
of the three primary colors. R G B each take on 256 gray levels.
2.Computer adopt two binary algorithm. The eighth power 2 equal 256. ( R G B ) each take on 8bits. then sending 24bits as
a complete chip data in the computer.
3 Computer takes 2.5 us for sending 1 bit data. ( 1s = 1000ms = 1000000us. )
4.Calculating base on 512Pixel, Refresh frequency=1000000 / ( 512Pixel * 2.5us * 24bit ) = 32.55 frame rate / S.
The computer‘s frame rate is 26 per second frame rate / S. So the controller frame rate must exceed the PC frame rate to
synchronize the controller‘s frame rate with the computer‘s
Our Advice:
Our Advice:
Because of the erroring when the transfer data between controller and chip ,but it is difficult to reach the theoretical value
32.55 frame rate / S, therefore the real frame rate will be about 28 frame rate / S to 30 frame rate / S.That‘s why we advice
customers each controller port drive 512 pixels when they make screen project.
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