I bought one of these LED matrix modules as described in this Adafruit PDF: https://cdn-learn.adafruit.com/downloads/pdf/32x16-32x32-rgb-led-matrix.pdf
The PDF says "they do not have built in PWM control of any kind. Instead, you're supposed to redraw the screen over and over to 'manually' PWM the whole thing."
The information on Aliexpress, where I bought the module, says that the refresh rate is 400Hz and the power consumption is 1400W per square meter, which is 36W for my 160*160 cm module. At a scan rate of 1:32 this yields 0.28W per pixel and that's 56mA at 5V. Now I don't know if these RGB LEDs are driven at a constant 56mA (19mA per color) or if I'm supposed to manually create a duty cycle of 50% because the LEDs might be driven at 112mA, or if the duty cycle is created by the refresh rate.
The question is, if I turn one line on full white and do not manually PWM it, will it burn the LEDs? Or does the module itself maintain a 50% duty cycle at 112mA or 100% at 56mA which should be OK for RGB LEDs?