daktronics led pwm refresh rate
we have a fault in the concept :
The vertical sync signal tells the monitor to start displaying a new
image or framme, and the monitor starts in the upper left corner
with pixel (0,0)
�� The horizontal sync signal tells the monitor to refresh another row
of 640 pixels
�� After 480 rows of pixels are refreshed with 480 horizontal sync
signals, a vertical sync signal resets the monitor to the upper left
corner and the process continues
�� During the time when pixel data is not being displayed and the
beam is returning to the left column to start another horizontal
scan, the RGB signals should all be set to black color (all zero)
�� In a PC graphics card, a dedicated memory location is used to
store the color value of every pixel in the display. This memory is
read out as the beam scanns across the screen to produce the
RGB signals