Almost 48h since we chose our subjet with Paulin de Naurois and Alexandre Blanchet.
Our goal is to display an Holographic Animation with Retinal Persistence (HARP), it’s like the project Roseace from last year but we choose to add one dimension.
And after having looked at all the notes from project Roseace, in order to have more comprehension lots of problems appears, but if they succeed, I’m sure we can too.
I think about the general structure and here are the first numbers:
If we want to display an 32*32 led screen, we have different chooses :
Or we put all of them on the same side, and the drivers on the other side of the PCB.
Or we separate them into two complementary groups on each side of the PCB.
For one revolution of our surface we will have 32*32*1024= 1048576 positions/leds to display one holographic image. the 1024 comes from the different positions of the rotating surface
If leds need 8 bits for it color, that means that each holographic static image weights around 1,05 Mo.
We can divided this size by 2 if we code each led colour on 4bits ( but we will loose in colour contrast => 4bits coding => 15 different colors)
We want 24 images /sec, with led colour encoded in 8 bits, we will need a 25,2 Mo/s debits if we want to display animation, and our surface will have to turn at speed of 1440 tour/min
The question is : do we want to maximize the number of led we are using or the quality of the image we are displaying ?