Shift register, gate driving circuit, display panel and display device

A gate driving circuit, comprising a plurality of shift registers;

• wherein each of the plurality of shift registers comprises a shift register signal input end, a first clock signal end, a second clock signal end, a third clock signal end, a first power source signal input end, a second power source signal input end, a first signal input end, a second signal input end, a first node, a second node, a third node, a fourth node, a first node control module, a second node control module, a third node control module, a fourth node control node, a first output module, a second output module, a storage module and a coupling module;
• wherein the first node control module comprises a first alpha control end, a second alpha control end, a third alpha control end, a first alpha input end, a second alpha input end and an alpha output end, the first alpha control end is electrically connected to the first clock signal end, the second alpha control end is electrically connected to the second clock signal end, the third alpha control end is electrically connected to the first node, the first alpha input end is electrically connected to the shift register signal input end, the second alpha input end is electrically connected to the first power source signal input end, the alpha output end is electrically connected to the second node;
• the first node control module is configured to control a connection between the first alpha input end and the alpha output end according to a signal inputted from the first alpha control end, or control a connection between the second alpha input end and the alpha output end according to a signal inputted from the second alpha control end and a signal inputted from the third alpha control end;
• wherein the second node control module comprises a first beta control end, a second beta control end, a first beta input end, a second beta input end and a beta output end, the first beta control end is electrically connected to the first clock signal end, the second beta control end is electrically connected to the second node, the first beta input end is electrically connected to the second power source signal input end, the second beta input end is electrically connected to the shift register signal input end, the beta output end is electrically connected to the first node;
• the second node control module is configured to control a connection between the first beta input end and the beta output end according to a signal inputted from the first beta control end, or control a connection between the second beta input end and the beta output end according to a signal inputted by the second beta control end;
• wherein the first output module comprises a first gamma control end, a second gamma control end, a first gamma input end, a second gamma input end, a gamma coupling end and a gamma output end, the first gamma control end is electrically connected to the first node, the second gamma control end and the gamma coupling end are electrically connected to the second node, the first gamma input end is electrically connected to the first power source signal input end, the second gamma input end is electrically connected to the second clock signal end, the gamma output end is electrically connected to the first signal output end;
• the first output module is configured to control a connection between the first gamma input end and the gamma output end according to a signal inputted from the first gamma control end, or control a connection between the second gamma input end and the gamma output end according to a signal inputted from the second gamma control end;
• wherein the third node control module comprises a first delta control end, a second delta control end, a first delta input end, a second delta input end and a delta output end, the first delta control end is electrically connected to the first signal output end, the second delta control end is electrically connected to the third clock signal input end, the first delta input end is electrically connected to the first power source signal input end, the second delta input end is electrically connected to the second power source signal input end, the delta output end is electrically connected to the third node;
• the third node control module is configured to control a connection between the first delta input end and the delta output end according to a signal inputted from the first delta control end, or control a connection between the second delta input end and the delta output end according to a signal inputted from the second delta control end;
• wherein the fourth node control module comprises a first epsilon control end, a second epsilon control end, a first epsilon input end, a second epsilon input end and an epsilon output end, the first epsilon control end is electrically connected to the third node, the second epsilon control end is electrically connected to the first signal output end, the first epsilon input end is electrically connected to the first power source signal input end, the second epsilon input end is electrically connected to the second power source signal input end, the epsilon output end is electrically connected to the fourth node;
• the fourth node control module is configured to control a connection between the first epsilon input end and the epsilon output end according to a signal inputted from first epsilon control end, or control a connection between the second epsilon input end and the epsilon output end according to a signal inputted from the second epsilon control end;
• wherein the second output module comprises a first zeta control end, a second zeta control end, a first zeta input end, a second zeta input end and a zeta output end, the first zeta control end is electrically connected to the fourth node, the second zeta control end is electrically connected to the third node, the first zeta input end is electrically connected to the first power source signal input end, the second zeta input end is electrically connected to the second power source signal input end, the zeta output end is electrically connected to the second signal output end;
• the second output module is configured to control a connection between the first zeta input end and the zeta output end according to a signal inputted from the first zeta control end, or control a connection between the second zeta input end and the zeta output end according to a signal inputted from the second zeta control end;
• wherein the storage module comprises a first eta end and a second eta end, the first eta end is electrically connected to the first node, the second eta end is electrically connected to the first power source signal input end;
• the storage module is configured to hold a stable potential at the first node;
• wherein the coupling module comprises a first theta end a second theta end, the first theta end is electrically connected to the third node, the second theta end is electrically connected to the second signal input end;
• the coupling module is configured to, in a case where a potential at the second signal input end varies, couple the potential at the second signal input end to the third node,
• wherein the shift register signal input end of a shift register in a first stage among the plurality of shift registers is electrically connected to an initial signal input end of the gate driving circuit, the first signal output end of a shift register in an i-th stage is electrically connected to the shift register signal input end of a shift register in an (i+1)-th stage;
• wherein i is an positive integer.

A display panel, comprising a display region and a non-display region surrounding the display region, wherein the non-display region is provided with a gate driving circuit;

• wherein the gate driving circuit comprises a plurality of shift registers;
• wherein each of the plurality of shift registers comprises a shift register signal input end, a first clock signal end, a second clock signal end, a third clock signal end, a first power source signal input end, a second power source signal input end, a first signal input end, a second signal input end, a first node, a second node, a third node, a fourth node, a first node control module, a second node control module, a third node control module, a fourth node control node, a first output module, a second output module, a storage module and a coupling module;
• wherein the first node control module comprises a first alpha control end, a second alpha control end, a third alpha control end, a first alpha input end, a second alpha input end and an alpha output end, the first alpha control end is electrically connected to the first clock signal end, the second alpha control end is electrically connected to the second clock signal end, the third alpha control end is electrically connected to the first node, the first alpha input end is electrically connected to the shift register signal input end, the second alpha input end is electrically connected to the first power source signal input end, the alpha output end is electrically connected to the second node;
• the first node control module is configured to control a connection between the first alpha input end and the alpha output end according to a signal inputted from the first alpha control end, or control a connection between the second alpha input end and the alpha output end according to a signal inputted from the second alpha control end and a signal inputted from the third alpha control end;
• wherein the second node control module comprises a first beta control end, a second beta control end, a first beta input end, a second beta input end and a beta output end, the first beta control end is electrically connected to the first clock signal end, the second beta control end is electrically connected to the second node, the first beta input end is electrically connected to the second power source signal input end, the second beta input end is electrically connected to the shift register signal input end, the beta output end is electrically connected to the first node;
• the second node control module is configured to control a connection between the first beta input end and the beta output end according to a signal inputted from the first beta control end, or control a connection between the second beta input end and the beta output end according to a signal inputted by the second beta control end;
• wherein the first output module comprises a first gamma control end, a second gamma control end, a first gamma input end, a second gamma input end, a gamma coupling end and a gamma output end, the first gamma control end is electrically connected to the first node, the second gamma control end and the gamma coupling end are electrically connected to the second node, the first gamma input end is electrically connected to the first power source signal input end, the second gamma input end is electrically connected to the second clock signal end, the gamma output end is electrically connected to the first signal output end;
• the first output module is configured to control a connection between the first gamma input end and the gamma output end according to a signal inputted from the first gamma control end, or control a connection between the second gamma input end and the gamma output end according to a signal inputted from the second gamma control end;
• wherein the third node control module comprises a first delta control end, a second delta control end, a first delta input end, a second delta input end and a delta output end, the first delta control end is electrically connected to the first signal output end, the second delta control end is electrically connected to the third clock signal input end, the first delta input end is electrically connected to the first power source signal input end, the second delta input end is electrically connected to the second power source signal input end, the delta output end is electrically connected to the third node;
• the third node control module is configured to control a connection between the first delta input end and the delta output end according to a signal inputted from the first delta control end, or control a connection between the second delta input end and the delta output end according to a signal inputted from the second delta control end;
• the fourth node control module comprises a first epsilon control end, a second epsilon control end, a first epsilon input end, a second epsilon input end and an epsilon output end, the first epsilon control end is electrically connected to the third node, the second epsilon control end is electrically connected to the first signal output end, the first epsilon input end is electrically connected to the first power source signal input end, the second epsilon input end is electrically connected to the second power source signal input end, the epsilon output end is electrically connected to the fourth node;
• the fourth node control module is configured to control a connection between the first epsilon input end and the epsilon output end according to a signal inputted from first epsilon control end, or control a connection between the second epsilon input end and the epsilon output end according to a signal inputted from the second epsilon control end;
• wherein the second output module comprises a first zeta control end, a second zeta control end, a first zeta input end, a second zeta input end and a zeta output end, the first zeta control end is electrically connected to the fourth node, the second zeta control end is electrically connected to the third node, the first zeta input end is electrically connected to the first power source signal input end, the second zeta input end is electrically connected to the second power source signal input end, the zeta output end is electrically connected to the second signal output end;
• the second output module is configured to control a connection between the first zeta input end and the zeta output end according to a signal inputted from the first zeta control end, or control a connection between the second zeta input end and the zeta output end according to a signal inputted from the second zeta control end;
• wherein the storage module comprises a first eta end and a second eta end, the first eta end is electrically connected to the first node, the second eta end is electrically connected to the first power source signal input end;
• the storage module is configured to hold a stable potential at the first node;
• wherein the coupling module comprises a first theta end a second theta end, the first theta end is electrically connected to the third node, the second theta end is electrically connected to the second signal input end;
• the coupling module is configured to, in a case where a potential at the second signal input end varies, couple the potential at the second signal input end to the third node,
• wherein the shift register signal input end of a shift register in a first stage among the plurality of shift registers is electrically connected to an initial signal input end of the gate driving circuit, the first signal output end of a shift register in an i-th stage is electrically connected to the shift register signal input end of a shift register in an (i+1)-th stage;
• wherein i is an positive integer, and
• wherein the display regions is provided with a plurality of scanning lines and a plurality of data lines, the plurality of scanning lines and the plurality of data lines intersect each other and define a plurality of sub-pixel regions, each sub-pixel regions is provides with one pixel circuit;
• the pixel circuit comprises at least one N-type transistor and at least one P-type transistor;
• in each row of pixel circuits, control ends of N-type transistors are electrically connected to the second signal output end of a shift register in one stage via one of the plurality of scanning line, control ends of P-type transistors are electrically connected to the first signal output end of the shift register in said stage via another one of the plurality of scanning lines.