Patent ID: 9741301
Date: 2017-08-22
CPC Classifications: G09G,G11C

Claim:
1. A driving circuit of a display panel, comprising a switching unit; a clamping unit that prevents reverse current leakage; a reference signal line coupled to a low level signal; a pull-up unit; and a pull-up control unit that drives the pull-up unit; wherein an input end of the pull-up unit receives a second clock signal, and an output end of the pull-up unit is coupled to a current scan line; the current scan line is coupled to a pull-down maintain unit, and the pull-down maintain unit comprises a first switching unit and a second switching unit; the first switching unit and the second switching unit are connected between the current scan line and the reference signal line in parallel; wherein a control end of the first switching unit and a control end of the second switching unit are coupled to an output end of the switching unit, a control end of the switching unit receives a first clock signal, and an input end of the switching unit receives the second clock signal through the clamping unit; a frequency of the second clock signal is greater than a frequency of the first clock signal; wherein a first controllable switch is connected in series between the control end of the first switching unit and the reference signal line, and a second controllable switch is connected in series between the control end of the second switching unit and the reference signal line; a control end of the first controllable switch and a control end of the second controllable switch are coupled to the pull-up control unit; when the current scan line is active, the pull-up control unit drives the first controllable switch and the second controllable switch to turn on, and the first switching unit and the second switching unit are turned off; when the current scan line is in a state during a low-level period, the pull-up control unit drives the first controllable switch and the second controllable switch to turn off, and the first switching unit and the second switching unit alternately turn on according to the first clock signal.