Mother substrate and display panel

1. A mother substrate, comprising:

a plurality of display panels, wherein each of the display panels has a display area, and comprises a plurality of first signal lines extending from outside of the display area to the display area in parallel;

a plurality of first test terminals, wherein the plurality of first signal lines of each of the display panels are respectively electrically connected to one of the plurality of first test terminals; and

a plurality of first one-way conductive circuits, wherein the plurality of first one-way conductive circuits are respectively electrically connected to the plurality of first signal lines outside of the display area, and are configured to allow signals to be able to transmit only from the plurality of first test terminals to the plurality of first signal lines of each of the display panels,

wherein each first one-way conductive circuit comprises a first conductive layer, a first insulation layer, an active layer, a second insulation layer, and a second conductive layer sequentially provided;

the first conductive layer comprises a first sub-region and a second sub-region which are insulated from each other; and

the second conductive layer comprises a first connection electrode and a second connection electrode which are insulated from each other, one end of the first connection electrode and one end of the second connection electrode are electrically connected to the first sub-region and the second sub-region respectively via through holes in the first insulation layer and the second insulation layer, and another end of the first connection electrode and another end of the second connection electrode are respectively electrically connected to the active layer.

2. The mother substrate according to claim 1 , further comprising a plurality of first test bus lines,

wherein the plurality of first test bus lines are electrically connected to the plurality of first test terminals,

each of the first one-way conductive circuits is electrically connected to one of the plurality of first test bus lines, such that the plurality of first signal lines of each of the display panels are respectively electrically connected to the one of the plurality of first test terminals.

3. The mother substrate according to claim 2 , wherein

each of the first one-way conductive circuits comprises a first terminal and a second terminal;

the first terminal is electrically connected to a corresponding one of the first signal lines;

the second terminal is electrically connected to a corresponding one of the first test bus lines; and a conducting direction of each of the first one-way conductive circuits is a direction from the second terminal to the first terminal, such that the signals are only allowed to be transmitted from the plurality of first test terminals to the plurality of first signal lines of each of the display panels.

4. The mother substrate according to claim 3 , wherein

each of the display panels further comprises a plurality of antistatic circuits and an electrostatic release line; and

the plurality of antistatic circuits are respectively provided between and electrically connected to the plurality of first signal lines and the electrostatic release line outside of the display area, and are respectively provided between and electrically connected to first terminals of the plurality of first one-way conductive circuits and the electrostatic release line.

5. The mother substrate according to claim 3 , wherein

each of the display panels further comprises a plurality of antistatic circuits, each of the antistatic circuits is provided between adjacent two first signal lines, and is provided between first terminals of two first one-way conductive circuits electrically connected to the adjacent two first signal lines.

6. The mother substrate according to claim 1 , further comprising a cutting area,

wherein the first test terminals are provided in the cutting area,

the plurality of first signal lines of each of the display panels are respectively electrically connected to the one of the plurality of first test terminals in the cutting area.

7. The mother substrate according to claim 6 , wherein the plurality of first one-way conductive circuits are provided in the cutting area.

8. The mother substrate according to claim 1 , wherein

at least two adjacent first signal lines are electrically connected to different first test terminals via corresponding first one-way conductive circuits.

9. The mother substrate according to claim 8 , wherein

the mother substrate comprises at least two first test terminals electrically connected to the first signal lines of each of the display panels,

one of the at least two first test terminals is electrically connected to the first signal lines in odd-numbered rows of each of the display panels, and another first test terminal of the at least two first test terminals is electrically connected to the first signal lines in even-numbered rows of each of the display panels.

10. The mother substrate according to claim 1 , further comprising: a plurality of second test terminals and a plurality of second one-way conductive circuits,

wherein each of the display panels further comprises a plurality of second signal lines extending from the outside of the display area to the display area in parallel, wherein the plurality of second signal lines intersect with the plurality of first signal lines;

the plurality of second signal lines of each of the display panels are respectively electrically connected to one of the plurality of second test terminals; and

the plurality of second one-way conductive circuits are respectively electrically connected to the plurality of second signal lines outside of the display area, and are configured to allow signals to be able to transmit only from the plurality of second test terminals to the plurality of second signal lines of each of the display panels.

11. The mother substrate according to claim 10 , further comprising a plurality of second test bus lines,

wherein the plurality of second test bus lines are electrically connected to the plurality of second test terminals, and each of the second one-way conductive circuits is electrically connected to one of the plurality of second test bus lines, such that the plurality of second signal lines of each of the display panels are respectively electrically connected to the one of the plurality of second test terminals.

12. The mother substrate according to claim 10 , wherein at least two adjacent second signal lines are electrically connected to different second test terminals via corresponding second one-way conductive circuits.

13. The mother substrate according to claim 1 , wherein

the first one-way conductive circuit further comprises a third conductive layer;

the third conductive layer is provided between the first insulation layer and the second insulation layer;

the third conductive layer comprises a first intermediate electrode and a second intermediate electrode;

one end of the first intermediate electrode and one end of the second intermediate electrode are respectively electrically connected to the first connection electrode and the second connection electrode via through holes in the second insulation layer; and

another end of the first intermediate electrode and another end of the second intermediate electrode are respectively electrically connected to the active layer.

14. The mother substrate according to claim 13 , wherein

each of the display panels comprises a thin film transistor;

the first conductive layer and a gate electrode of the thin film transistor are in a same one layer;

the first insulation layer and a gate insulation layer of the thin film transistor are in a same one layer;

the active layer and a semiconductor layer of the thin film transistor are in a same one layer;

the second insulation layer and a passivation layer of the thin film transistor are in a same one layer;

the second conductive layer and a pixel electrode or a common electrode of the display panel are in a same one layer; and

the third conductive layer and a source electrode and a drain electrode of the thin film transistor are in a same one layer.

15. The mother substrate according to claim 1 , wherein

the first one-way conductive circuit comprises a diode; or

the first one-way conductive circuit comprises a transistor, and a gate electrode of the transistor is electrically connected to a source electrode or a drain electrode of the transistor.

16. The mother substrate according to claim 1 , wherein

an orthographic projection of the first sub-region on the mother substrate and an orthographic projection of the active layer on the mother substrate are at least partially overlapped with each other; and

an orthographic projection of the second sub-region on the mother substrate and the orthographic projection of the active layer on the mother substrate are not overlapped with each other.

17. A display panel including a display area, the display panel comprising: a plurality of first signal lines and a plurality of first one-way conductive circuits,

wherein the plurality of first signal lines extend from outside of the display area to the display area in parallel; and

the plurality of first one-way conductive circuits are respectively electrically connected to the plurality of first signal lines outside of the display area, and are configured to allow signals in each of the first signal lines to be capable of transmitting toward only one direction,

wherein the first one-way conductive circuit comprises a first conductive layer, a first insulation layer, an active layer, a second insulation layer, and a second conductive layer sequentially provided;

the first conductive layer comprises a first sub-region and a second sub-region which are insulated from each other; and

the second conductive layer comprises a first connection electrode and a second connection electrode which are insulated from each other, one end of the first connection electrode and one end of the second connection electrode are electrically connected to the first sub-region and the second sub-region respectively via through holes in the first insulation layer and the second insulation layer, and another end of the first connection electrode and another end of the second connection electrode are respectively electrically connected to the active layer.

18. The display panel according to claim 17 , further comprising: a plurality of second signal lines being intersected with the plurality of first signal lines, and a plurality of second one-way conductive circuits,

wherein the plurality of second signal lines extend from the outside of the display area to the display area in parallel; and

the plurality of second one-way conductive circuits are respectively electrically connected to the plurality of second signal lines outside of the display area, and are configured to allow signals in each of the second signal lines to be capable of transmitting toward only one direction.