Inkjet printing method of array substrate, array substrate and display device

1. An inkjet printing method of an array substrate, wherein the array substrate comprises n kinds of sub-pixels; solvent volumes of solutions required for inkjet printing of the n kinds of sub-pixels are different; n is a positive integer greater than or equal to 2; and the method comprises:

recording a solvent volume required for inkjet printing of an i-th kind of sub-pixel as Vi, in which i is a positive integer less than or equal to n;

calculating an Xi value for each kind of the n kinds of sub-pixels, in which Xi=Vi/V1, and V1 refers to a solvent volume required for inkjet printing of a first kind of sub-pixels;

taking a greatest common divisor of the Xi values of the n kinds of sub-pixels, and recording the greatest common divisor as G; and

dividing the i-th kind of sub-pixel into Xi/G subunits with equal areas, and performing inkjet printing on each of the subunits of the i-th kind of sub-pixel with a solvent volume of V1*G to form a film layer.

2. The method according to claim 1 , wherein, upon a value of the Xi/G being greater than or equal to 2, two adjacent ones of the subunits of the i-th kind of sub-pixel are separated from each other.

3. The method according to claim 1 , further comprising: before performing the inkjet printing, forming a unit define layer in the i-th kind of sub-pixel with the Xi/G greater than or equal to 2, to define the Xi/G subunits.

4. The method according to claim 3 , further comprising: upon a value of the Xi/G being greater than or equal to 2, forming a channel for connecting two adjacent ones of the subunits in the unit define layer between the two adjacent ones of the subunits of the i-th kind of sub-pixel,

wherein, in a direction perpendicular to an arrangement direction of the two adjacent ones of the subunits, a size of the channel is less than a size of each of the subunits.

5. The method according to claim 1 , wherein performing the inkjet printing on each of the subunits of the i-th kind of sub-pixel with a solvent volume of V1*G to form the film layer comprises:

performing the inkjet printing of a solution comprising the solvent of the solvent volume of V1*G on each of the subunits of the i-th kind of sub-pixel; and

simultaneously drying the solutions of the n kinds of sub-pixels to form the film layer.

6. The method according to claim 1 , wherein the film layer comprises at least one selected from the group consisting of a light emitting layer, an electron transport layer, an electron injection layer, a hole transport layer, and a hole injection layer.

7. The method according to claim 1 , wherein, upon a value of the Xi/G being greater than or equal to 2, an interval between two adjacent ones of the subunits of the i-th kind of sub-pixel is not greater than an interval between two adjacent ones of sub-pixels in the n kinds of sub-pixels.

8. The method according to claim 1 , wherein calculating the Xi value comprises: upon a number of digits after a decimal point of the Xi value being greater than or equal to 2, reserving one decimal number for the Xi value by a rounding-off method.

9. The method according to claim 1 , wherein an area of the film layer of the i-th kind of sub-pixel is recorded as Si; areas of the film layers of at least one two kinds of sub-pixels in the n kinds of sub-pixels are different; and the solvent volumes Vi for forming the film layers of the at least two kinds of sub-pixels are positively related to the area Si.

10. The method according to claim 1 , wherein n is equal to 3 and the n kinds of sub-pixels are respectively red sub-pixels, green sub-pixels, and blue sub-pixels.

11. The method according to claim 1 , wherein

Vi=Ci*(1-Bi),

Ci refers to the solution volume required for the inkjet printing of the i-th kind of sub-pixel, and Bi refers to a volume concentration of the solution for the inkjet printing of the i-th kind of sub-pixel.