A PWM signal is made to rise synchronously with a pixel clock by inputting of a pulse to {TAIL ~ a set terminal} of {HEAD ~ an R S flip flop} 
A PWM signal is made to rise synchronously with a pixel clock by inputting of a pulse to { TAIL ~ a set terminal } of { HEAD ~ an R S flip flop }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD