Patent ID: 7215317

Claim:
A method for modulating the backlight source (BLS) of a flat panel display, comprising series of execution steps in the sequence set forth: (a1) turning on a display screen; (a2) identifying the total number of the BLS groups provided on the backlight module; (a3) turning on the one BLS group located at the center-most region of the backlight module while the total number of the BLS groups is an odd number; (a4) turning on the two BLS groups located at the center-most region of the screen while the total number of the BLS groups is an even number; (a5) turning on the two BLS groups located at the two outer side of the center turned-on BLS groups while turning off the center turned-on BLS group, and similarly, progressing the turning-on and the tu rning-off from the center region to the two outer edge of the backlight module and then reverse-progressing respectively from the two edges to the center region, so as to complete a full cycle; (a6) determining whether the display screen is off; if so, the process proceeds to step (a7); otherwise, the process goes to step (a1); and (a7) ending the process.