| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a backlight inverter for an asynchronous PWM drive system LCD panel. <P>SOLUTION: This backlight inverter for the LCD panel is provided with a main drive integrated circuit 210, which generates PWM pulses P11 and P12 according to a dimming voltage Vdim based on illuminance regulation and a PWM oscillation signal PWM OSC generated internally, delays the PWM pulses by a previously set time, and outputs PWM drive signals according to the time-delayed PWM pulses PT11 and PT12, at least one sub drive integrated circuit 310 delaying the time-delayed PWM pulses by a previously set time and outputting PWM drive signals according to the time-delayed PWM pulses, and a plurality of lamp operation circuits operating respective lamp pairs among a plurality of lamps Lamp1-Lamp4 according to the respective PWM driving signals. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
