For example, I made a 4*4 dot matrix screen, I first row to light a lamp for second light three lights, so if I give each line driving current of 10MA, then I will be the first line of a line of 3 light spot, second light dark point? It is the brightness of each lamp dot matrix screen is the same ah, ask is how to allocate the current. Better details, thank you
For example, 4 * 4 dot matrix, you only need to string a current limiting resistor on each of the 4 column pins, a total of four resistors, you can achieve the purpose
There is no complete circuit, it is difficult to answer, we do not know how your screen is done.
Every time you gate line, and then drive the LED in a row, and that several LED are in different columns above, as long as can guarantee the current of each column are the same or similar, regardless of what you do at the same time a few columns will be bright, brightness is equal.
Best answerThe simple way is to have a current limiting resistor in series at each pin
