Flexible array substrate and display apparatus
A flexible array substrate includes at least one stretchable region; wherein the flexible array substrate is provided with a plurality of through holes within the stretchable region, and the plurality of through holes divide the stretchable region into a pixel island area for displaying and a bridging area for signal transmission; the bridging area includes a source-drain bridging area. The flexible array substrate, in the source-drain bridging area, includes: a base substrate, a first source-drain metal layer, a first insulating material layer, a second source-drain metal layer, a second insulating material layer, and an encapsulation layer that are sequentially stacked.
1. A flexible array substrate, comprising at least one stretchable region; wherein the flexible array substrate is provided with a plurality of through holes within the stretchable region, and the plurality of through holes divide the stretchable region into a pixel island area for displaying and a bridging area for signal transmission; the bridging area comprises a source-drain bridging area, and the flexible array substrate, in the source-drain bridging area, comprises:
a base substrate;
a first source-drain metal layer, provided on one side of the base substrate, and comprising a plurality of first source-drain leads;
a first insulating material layer, provided on one side of the first source-drain metal layer away from the base substrate;
a second source-drain metal layer, provided on one side of the first insulating material layer away from the base substrate; wherein the second source-drain metal layer comprises a plurality of second source-drain leads, and a number of the second source-drain leads is less than a number of the first source-drain leads;
a second insulating material layer, provided on one side of the second source-drain metal layer away from the base substrate; wherein the second insulating material layer is provided with a plurality of isolation grooves, and an orthographic projection of the isolation grooves on the second source-drain metal layer isolates the second source-drain leads and the through holes; and
an encapsulation layer, provided on one side of the second insulating material layer away from the base substrate.
2. The flexible array substrate according to claim 1 , wherein, in the source-drain bridging area, a minimum distance between an orthographic projection of the second source-drain leads on the second insulating material layer and the isolation grooves is not less than a distance between two adjacent second source-drain leads.
3. The flexible array substrate according to claim 1 , wherein, in the source-drain bridging area, a width of the isolation grooves is not greater than twice a distance between two adjacent second source-drain leads.
4. The flexible array substrate according to claim 1 , wherein, in the source-drain bridging area, a width of the isolation grooves is equal to 0.9-1.1 times a distance between two adjacent second source-drain leads; more than one of the isolation grooves are provided between one of the second source-drain leads and one of the through holes adjacent thereto, and a distance between two adjacent isolation grooves is equal to 0.9-1.1 times the distance between two adjacent second source-drain leads.
5. The flexible array substrate according to claim 1 , wherein, in the source-drain bridging area, a distance between two adjacent second source-drain leads is not greater than 2 times a width of the second source-drain leads.
6. The flexible array substrate according to claim 1 , wherein, in the source-drain bridging area, the second source-drain leads are arranged at equal intervals; two adjacent through holes in the source-drain bridging area are located at a same minimum distance to the second source-drain leads.
7. The flexible array substrate according to claim 1 , wherein, in the source-drain bridging area, a distance between two adjacent first source-drain leads is not greater than a distance between two adjacent second source-drain leads.
8. The flexible array substrate according to claim 1 , wherein, in the source-drain bridging area, a minimum distance between an orthographic projection of the first source-drain lead on the second insulating material layer and the isolation groove is not greater than a minimum distance between an orthographic projection of the second source-drain lead on the second insulating material layer and the isolation groove.
9. The flexible array substrate according to claim 1 , wherein, in the source-drain bridging area, an orthographic projection of the first source-drain lead on the second insulating material layer at least partially overlaps with the isolation groove.
10. The flexible array substrate according to claim 1 , wherein, in the source-drain bridging area, a minimum distance between an orthographic projection of the first source-drain lead on the second insulating material layer and the isolation groove is 1.5-2.7 μm; a minimum distance between an orthographic projection of the second source-drain lead on the second insulating material layer and the isolation groove is 4.5-6.0 μm.
11. The flexible array substrate according to claim 1 , wherein a number of the first source-drain leads is greater than a number of the second source-drain leads by 1 or 2.
12. The flexible array substrate according to claim 1 , wherein a width of an end of the isolation groove away from the base substrate is smaller than a width of another end of the isolation groove close to the base substrate.
13. The flexible array substrate according to claim 1 , wherein, in the source-drain bridging area, an extending direction of the first source-drain lead is parallel or perpendicular to an extending direction of the through hole; and an extending direction of the second source-drain lead is parallel or perpendicular to the extending direction of the through hole.
14. The flexible array substrate according to claim 1 , wherein the pixel island area comprises a plurality of sub-pixels; a size of any one of the sub-pixels along a row direction is a first size, a distance between two adjacent second source-drain leads in the source-drain bridging area is a second size, and the first size is larger than the second size.
15. The flexible array substrate according to claim 1 , wherein the through holes comprise a first strip hole extending in a row direction and a second strip hole extending in a column direction; and the source-drain bridging area is located between a widthwise end of the first strip hole and a lengthwise side of the second strip hole.
16. The flexible array substrate according to claim 15 , wherein the pixel island area is located between two adjacent first strip holes, and is located between two adjacent second strip holes; the pixel island area comprises four pixels, and any one of the pixels comprises a red sub-pixel, a green sub-pixel and a blue sub-pixel.
17. The flexible array substrate according to claim 16 , wherein, in the pixel island area, the four pixels are formed into two pixel rows, and any one of the pixel rows comprises two pixels arranged along the row direction; and
wherein, in any one of the pixel rows, a pixel electrode of the blue sub-pixel and a pixel electrode of the red sub-pixel are arranged along the row direction, and are located at one side of a pixel electrode of the green sub-pixel away from another one of the pixel rows.
18. The flexible array substrate according to claim 1 , wherein the flexible array substrate comprises a plurality of sub-pixels provided in an array in the pixel island area, any one of the sub-pixels comprises a pixel driving circuit and a pixel electrode electrically connected to the pixel driving circuit; and the pixel driving circuit comprises a storage capacitor, a first thin film transistor, a second thin film transistor, a third thin film transistor, a fourth thin film transistor, a fifth thin film transistor, a sixth thin film transistor and a seventh thin film transistor; wherein,
a first end of the first thin film transistor is configured to load an initial signal, a second end of the first thin film transistor is electrically connected to a first electrode plate of the storage capacitor, and a control end of the first thin film transistor is configured to load a reset signal;
a first end of the second thin film transistor is electrically connected to a second end of the third thin film transistor and a first end of the sixth thin film transistor, and a second end of the second thin film transistor is electrically connected to the first electrode plate of the storage capacitor, and a control end of the second thin film transistor is configured to load a scan signal;
a first end of the third thin film transistor is electrically connected to a second end of the fourth thin film transistor and a second end of the fifth thin film transistor, and a control end of the third thin film transistor is electrically connected to the first electrode plate of the storage capacitor;
a first end of the fourth thin film transistor is configured to load a data signal, and a control end of the fourth thin film transistor is configured to load the scan signal;
a first end of the fifth thin film transistor is configured to load a power supply voltage, and a control end of the fifth thin film transistor is configured to load an enable signal;
a second end of the sixth thin film transistor is electrically connected to the pixel electrode, and a control end of the sixth thin film transistor is configured to load the enable signal;
a first end of the seventh thin film transistor is configured to load the initial signal, a second end of the seventh thin film transistor is electrically connected to the pixel electrode, and a control end of the seventh thin film transistor is configured to load the reset signal; and
a second electrode plate of the storage capacitor is configured to load the power supply voltage.
19. The flexible array substrate according to claim 18 , wherein the pixel island area comprises a first pixel driving circuit column, a second pixel driving circuit column, a third pixel driving circuit column, a fourth pixel driving circuit column, a fifth pixel driving circuit column and a sixth pixel driving circuit column arranged in sequence along a preset direction, any one of the first to sixth pixel driving circuit columns comprises a plurality of the pixel driving circuits arranged in a column direction, and the preset direction is parallel to a row direction;
in the source-drain bridging area, the number of the first source-drain leads is five; a first one of the first source-drain leads along the preset direction is configured to load the data signal to the first pixel driving circuit column; a second one of the first source-drain leads along the preset direction is configured to load the data signal to the second pixel driving circuit column; and a fourth one of the first source-drain leads along the preset direction is configured to load the data signal to the fifth pixel driving circuit column.
20. A display apparatus comprising the flexible array substrate according to claim 1 .