May be the answers useful for you :
1. Do u have back-light.
2. From I observed I see the LED board which This board have the small size LED is very beautiful(light)more than the big size LED and the blackground is black colour.
May be the answers useful for you :
1. Do u have back-light.
2. From I observed I see the LED board which This board have the small size LED is very beautiful(light)more than the big size LED and the blackground is black colour.
I think you can apply a current value that do not exceed the led's peak current (see led's datasheet) and which give a average value equal to the normal current value.
For example, if led normal current is 10mA and led is on 3.3ms every 16ms, this give a value of ((16ms/3.3ms) * 10mA) = 48.5mA . With this value, average current is equal to 10mA. Check if 48,5mA is not over the led's peak current.
well minimum refreshing rate of a group of leds (rows/columns) should be atleast 50Hz. on time of column/row depends on no. of columns/rows.
for column by column multiplexing,
for 60 columns
each should have 50hz
so total period =20ms
on time of a column=20ms/60=333us
since each column has duty cycle of 1/60th average current =peak current/60
so for 60mA peak current; average current is 1mA
also you can't exceed max.peak current rating of leds