Patent ID: 8917031

Claim:
A backlight panel circuit comprising: a Light Emitting Diode (LED) driver including a plurality of voltage followers and a Pulse Width Modulation (PWM) signal transmitter; LED chains; and a plurality of switch circuit units corresponding to the plurality of voltage follows in a one-to-one relationship, each of the switch circuit units comprising: a first switch circuit, a current input terminal of the first switch circuit being connected to an output terminal of a corresponding voltage follow, a current output terminal of the first switch circuit being connected to a first LED chain, and a signal input terminal of the first switch circuit being connected to a signal output terminal of the PWM signal transmitter for receiving an on-off signal transmitted from the PWM signal transmitter; and a second switch circuit, a current input terminal of the second switch circuit being connected to the output terminal of the corresponding voltage follow, a current output terminal of the second switch circuit being connected to a second LED chain, and a signal input terminal of the second switch circuit being connected to the signal output terminal of the PWM signal transmitter for receiving the on-off signal transmitted from the PWM signal transmitter; wherein the PWM signal transmitter is adapted to transmit the on-off signal to the first and second switch circuits so as to control an alternate turn-on of the first switch circuit and the second switch circuit, wherein the first LED chain emits light when the first switch circuit turns on and the second LED chain emits light when the second switch circuit turns on.