Array substrate and manufacturing method therefor, display panel, and display device
An array substrate is configured to carry a plurality of light emitting units with different light emitting colors. The array substrate includes a plurality of pixel driving circuits, a first voltage input line and a second voltage input line. The plurality of pixel driving circuits include at least one first driving circuit and at least one second driving circuit. The first voltage input line is coupled to the at least one first driving circuit, and is configured to transmit a first voltage to the at least one first driving circuit. The second voltage input line is coupled to the at least one second driving circuit, and is configured to transmit a second voltage to the at least one second driving circuit. The first voltage is different from the second voltage.
1. An array substrate configured to carry a plurality of light emitting units with different light emitting colors, the array substrate comprising:
a plurality of pixel driving circuits including at least one first driving circuit and at least one second driving circuit, a first driving circuit in the at least one first driving circuit and two second driving circuits in the at least one second driving circuit being configured to drive light emitting units with different light emitting colors, respectively, wherein each light emitting unit has a first electrode and a second electrode, and the first driving circuit and the two second driving circuits are respectively coupled to first electrodes of the light emitting units with the different light emitting colors;
a first voltage input line coupled to the at least one first driving circuit and configured to transmit a first voltage to the at least one first driving circuit;
a second voltage input line coupled to the at least one second driving circuit and configured to transmit a second voltage to the at least one second driving circuit, the first voltage being different from the second voltage; and
a common voltage input line coupled to second electrodes of the plurality of light emitting units with the different light emitting colors and configured to transmit a set voltage to the second electrodes of the plurality of light emitting units with the different light emitting colors;
wherein the plurality of light emitting units include at least one red light emitting unit, at least one green light emitting unit and at least one blue light emitting unit;
the first driving circuit is configured to drive a red light emitting unit in the at least one red light emitting unit, one second driving circuit of the two second driving circuits is configured to drive a green light emitting unit in the at least one green light emitting unit, and another second driving circuit of the two second driving circuits is configured to a blue light emitting unit in the at least one blue light emitting unit; and
a voltage difference between the first voltage and the set voltage is greater than a voltage difference between the second voltage and the set voltage.
2. The array substrate according to claim 1 , wherein
the first driving circuit includes a first driving transistor, and each second driving circuit of the two second driving circuits includes a second driving transistor;
a width to length ratio of the first driving transistor is greater than a width to length ratio of the second driving transistor.
3. The array substrate according to claim 2 , wherein
the first driving circuit further includes a first switching transistor, and the second driving circuit further includes a second switching transistor;
a width to length ratio of the first switching transistor is greater than a width to length ratio of the second switching transistor.
4. The array substrate according to claim 1 , wherein the plurality of pixel driving circuits further include at least one third driving circuit; the array substrate further comprises:
a third voltage input line coupled to the at least one third driving circuit and configured to transmit a third voltage to the at least one third driving circuit, the third voltage being different from both the first voltage and the second voltage.
5. The array substrate according to claim 4 , wherein
the first driving circuit includes a first driving transistor, the second driving circuit includes a second driving transistor, and the third driving circuit includes a third driving transistor;
a width to length ratio of the first driving transistor is greater than a width to length ratio of the second driving transistor, and the width to length ratio of the second driving transistor is greater than a width to length ratio of the third driving transistor.
6. The array substrate according to claim 5 , wherein
the first driving circuit further includes a first switching transistor, the second driving circuit further includes a second switching transistor, and the third driving circuit further includes a third switching transistor;
a width to length ratio of the first switching transistor is greater than a width to length ratio of the second switching transistor, and the width to length ratio of the second switching transistor is greater than a width to length ratio of the third switching transistor.
7. The array substrate according to claim 1 , wherein
a light emitting unit in the plurality of light emitting units is a micro light emitting diode or a sub-millimeter light emitting diode.
8. A display panel, comprising:
the array substrate according to claim 1 ; and
the plurality of light emitting units with different light emitting colors disposed on the array substrate.
9. A display device, comprising the display panel according to claim 8 .
10. An array substrate configured to carry a plurality of light emitting units with different light emitting colors, the array substrate comprising:
a plurality of pixel driving circuits including at least one first driving circuit, at least one second driving circuit and at least one third driving circuit, a first driving circuit in the at least one first driving circuit and a second driving circuit in the at least one second driving circuit being configured to drive light emitting units with different light emitting colors, respectively, wherein each light emitting unit has a first electrode and a second electrode, and the first driving circuit and the second driving circuit are respectively coupled to first electrodes of the light emitting units with the different light emitting colors;
a first voltage input line coupled to the at least one first driving circuit and configured to transmit a first voltage to the at least one first driving circuit;
a second voltage input line coupled to the at least one second driving circuit and configured to transmit a second voltage to the at least one second driving circuit, the first voltage being different from the second voltage;
a common voltage input line coupled to second electrodes of the plurality of light emitting units with the different light emitting colors and configured to transmit a set voltage to the second electrodes of the plurality of light emitting units with the different light emitting colors; and
a third voltage input line coupled to the at least one third driving circuit and configured to transmit a third voltage to the at least one third driving circuit, the third voltage being different from both the first voltage and the second voltage, wherein
the plurality of light emitting units include at least one red light emitting unit, at least one green light emitting unit and at least one blue light emitting unit;
the first driving circuit is coupled to a first electrode of a red light emitting unit in the at least one red light emitting unit, and is configured to drive the red light emitting unit; the second driving circuit is coupled to a first electrode of a green light emitting unit in the at least one green light emitting unit, and is configured to drive the green light emitting unit; and the third driving circuit is coupled to a first electrode of a blue light emitting unit in the at least one blue light emitting unit, and is configured to drive the blue light emitting unit; and
a voltage difference between the first voltage and the set voltage is greater than a voltage difference between the second voltage and the set voltage, and the voltage difference between the second voltage and the set voltage is greater than a voltage difference between the third voltage and the set voltage.
11. The array substrate according to claim 10 , wherein
the first driving circuit includes a first driving transistor, the second driving circuit includes a second driving transistor, and the third driving circuit includes a third driving transistor;
a width to length ratio of the first driving transistor is greater than a width to length ratio of the second driving transistor, and the width to length ratio of the second driving transistor is greater than a width to length ratio of the third driving transistor.
12. The array substrate according to claim 11 , wherein
the first driving circuit further includes a first switching transistor, the second driving circuit further includes a second switching transistor, and the third driving circuit further includes a third switching transistor;
a width to length ratio of the first switching transistor is greater than a width to length ratio of the second switching transistor, and the width to length ratio of the second switching transistor is greater than a width to length ratio of the third switching transistor.
13. The array substrate according to claim 10 , wherein
a light emitting unit in the plurality of light emitting units is a micro light emitting diode or a sub-millimeter light emitting diode.
14. A display panel, comprising:
the array substrate according to claim 7 ; and
the plurality of light emitting units with different light emitting colors disposed on the array substrate.
15. A display device, comprising the display panel according to claim 14 .
16. A manufacturing method of an array substrate, the method comprising:
forming a plurality of pixel driving circuits including at least one first driving circuit and at least one second driving circuit, a first driving circuit in the at least one first driving circuit and two second driving circuits in the at least one second driving circuit being configured to drive light emitting units with different light emitting colors, wherein each light emitting unit has a first electrode and a second electrode, and the first driving circuit and the two second driving circuits are respectively coupled to first electrodes of the light emitting units with the different light emitting colors;
forming a first voltage input line coupled to the at least one first driving circuit and configured to transmit a first voltage to the at least one first driving circuit; and
forming a second voltage input line coupled to the at least one second driving circuit and configured to transmit a second voltage to the at least one second driving circuit, wherein the first voltage is different from the second voltage;
forming a common voltage input line coupled to second electrodes of the plurality of light emitting units with the different light emitting colors and configured to transmit a set voltage to the second electrodes of the plurality of light emitting units with the different light emitting colors;
wherein the plurality of light emitting units include at least one red light emitting unit, at least one green light emitting unit and at least one blue light emitting unit;
the first driving circuit is configured to drive a red light emitting unit in the at least one red light emitting unit, one second driving circuit of the two second driving circuits is configured to drive a green light emitting unit in the at least one green light emitting unit, and another second driving circuit of the two second driving circuits is configured to drive a blue light emitting unit in the at least one blue light emitting unit; and
a voltage difference between the first voltage and the set voltage is greater than a voltage difference between the second voltage and the set voltage.