Pixel driving circuit and liquid crystal display circuit with the same

A pixel driving circuit, configured to drive a pixel structure having a plurality of pixel units, each of the plurality of pixel units comprising a red subpixel unit, a green subpixel unit, and a blue subpixel unit, the pixel driving circuit comprising:

• a plurality of data lines, an input terminal of each of the plurality of data lines receiving a data signal;
• a plurality of selecting circuits, each of the selecting circuits comprising a data input terminal connected to one of the plurality of data lines, a first output terminal connected to a red subpixel unit of a pixel unit, a second output terminal connected to a green subpixel unit of the pixel unit, and a third output terminal connected to a blue subpixel unit of the pixel unit;
• a plurality of scanning lines, each connected to one of the subpixel units of the pixel units;
• a plurality of voltage-variation circuits, each of the voltage-variation circuits comprising an input terminal configured to receive the scanning signal, an output terminal connected to one of the plurality of scanning lines, wherein each of the plurality of voltage-variation circuits is selectively operable in a voltage-regulated state or a conduct state;
• wherein in response to a transition of signal output by the first output terminal from a high voltage level to a low voltage level or a transition of signal output by the second output terminal from the high voltage level to the low voltage level, the voltage-variation circuit switches to the voltage-regulated state for a first predetermined duration so that scanning signal output to the subpixel unit shifts from the high voltage level to the low voltage level, and the voltage-variation circuit switches to be the conduct state after the first predetermined duration.

A liquid crystal display circuit comprising a pixel driving circuit and a pixel structure having a plurality of pixel units, each of the plurality of pixel units comprising a red subpixel unit, a green subpixel unit, and a blue subpixel unit, the pixel driving circuit comprising:

• a plurality of data lines, an input terminal of each of the plurality of data lines receiving a data signal;
• a plurality of selecting circuits, each of the selecting circuits comprising a data input terminal connected to one of the plurality of data lines, a first output terminal connected to a red subpixel unit of a pixel unit, a second output terminal connected to a green subpixel unit of the pixel unit, and a third output terminal connected to a blue subpixel unit of the pixel unit;
• a plurality of scanning lines, each connected to one of the subpixel units of the pixel units;
• a plurality of voltage-variation circuits, each of the voltage-variation circuits comprising an input terminal configured to receive the scanning signal, an output terminal connected to one of the plurality of scanning lines, wherein each of the plurality of voltage-variation circuits is selectively operable in a voltage-regulated state or a conduct state;
• wherein in response to a transition of signal output by the first output terminal from a high voltage level to a low voltage level or a transition of signal output by the second output terminal from the high voltage level to the low voltage level, the voltage-variation circuit switches to the voltage-regulated state for a first predetermined duration so that scanning signal output to the subpixel unit shifts from the high voltage level to the low voltage level, and the voltage-variation circuit switches to be the conduct state after the first predetermined duration.