SMUGangsta
New Member
please forgive my ignorance if im a mile off - and my lack of technical terms - but on the data sheet it says the clock can be pulse on/off in 20ns, therfore 20ns on,20 ns off = 40ns per pulse
40ns * 64 = 2560ns (2.56ms i think)
+ say 40ns for the latch = 2.6ms
at a refresh rate (for the single module) of 20Hz (should be ok for video), that is 40ms between refreshes
therefore you have 40/2.6 = 15 (and some change) chances to turn each led on or off per refresh
so by dividing the brightness of each pixel by 15, and sending an 'on' for that pixel for that many cycles you have 15 levels of brightness for that led.
sorry i cant explain better:- but if you want a pixel at half brightness, then from the start of the refresh you send a 'on' the first 8 times, then an 'off' the remaining 7 times.
that would give you a half brightness led
repeat that for all 4 pixels and you get (15^4) thats 15 brigness ^ 4 leds = 50625 colours (not as many as youd like) but a start
please dont flame me too much - im a newbie and i dont read chinese
EDIT:
just re-read the diagram, same principle but it clocks in 8 lines simultainously * 64 bits (on the driver board) , and does each colour led independently
but still do-able
40ns * 64 = 2560ns (2.56ms i think)
+ say 40ns for the latch = 2.6ms
at a refresh rate (for the single module) of 20Hz (should be ok for video), that is 40ms between refreshes
therefore you have 40/2.6 = 15 (and some change) chances to turn each led on or off per refresh
so by dividing the brightness of each pixel by 15, and sending an 'on' for that pixel for that many cycles you have 15 levels of brightness for that led.
sorry i cant explain better:- but if you want a pixel at half brightness, then from the start of the refresh you send a 'on' the first 8 times, then an 'off' the remaining 7 times.
that would give you a half brightness led
repeat that for all 4 pixels and you get (15^4) thats 15 brigness ^ 4 leds = 50625 colours (not as many as youd like) but a start
please dont flame me too much - im a newbie and i dont read chinese
EDIT:
just re-read the diagram, same principle but it clocks in 8 lines simultainously * 64 bits (on the driver board) , and does each colour led independently
but still do-able
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