FIELD: physics.
SUBSTANCE: LED backlight system includes an LCD module and a LED lighting control circuit. The LCD module includes LED strings. The LED illumination control circuit includes a current module, a comparator unit, a control switch block, and a resistance unit, wherein the input of the comparison unit receives voltage from the negative terminal of the LED string, and when the voltage at the negative terminal is greater than a predetermined threshold voltage, the comparison unit translates the control switch unit in the "Enabled" position, while the resistance unit is connected in parallel with the current module to reduce the voltage at the negative terminal.
EFFECT: reducing the flicker of the backlight system by reducing the instability of the closed circuit.
20 cl, 3 dwg
