Display panel and display device with uniform brightness

1. A display panel, comprising a plurality of sub-pixels arranged in array, the plurality of sub-pixels each comprises a pixel drive circuit and a light-emitting component; the pixel drive circuit is configured to provide a driving current for the light-emitting component, and the light-emitting component is configured to emit light in response to the driving current;

the plurality of sub-pixels comprise a plurality of first type sub-pixels and a plurality of second type sub-pixels, a difference between a turn-on voltage of the light-emitting component of each first type sub-pixel of the plurality of first type sub-pixels and a turn-on voltage of the light-emitting component of each second type sub-pixel of the plurality of second type sub-pixels is greater than a preset value;

wherein the plurality of sub-pixels comprises at least one of a plurality of first voltage-regulating modules or a plurality of second voltage-regulating modules,

wherein the plurality of first voltage-regulating modules are comprised in the plurality of first type sub-pixels, each first voltage-regulating module of the plurality of first voltage-regulating modules is connected between the pixel drive circuit and a first end of the light-emitting component of the each first type sub-pixel and is configured to increase a voltage between the first end and a second end of the light-emitting component of the each first type sub-pixel;

wherein the plurality of second voltage-regulating modules are comprised in the plurality of second type sub-pixels, each second voltage-regulating module of the plurality of second voltage-regulating modules is connected between the pixel drive circuit and a first end of the light-emitting component of the each second type sub-pixel and is configured to reduce a voltage between the first end and a second end of the light-emitting component of the each second type sub-pixel,

wherein the first end and the second end of the light-emitting component are an anode and a cathode respectively.

2. The display panel according to claim 1 , wherein at least one of the each first voltage-regulating module or the each second voltage-regulating module comprises a first transistor, a first electrode of the first transistor is electrically connected to an output end of the pixel drive circuit, and a second electrode of the first transistor is electrically connected to the first end of the light-emitting component; the second end of the light-emitting component is electrically connected to a first power supply voltage signal line; and a gate electrode of the first transistor is electrically connected to the first electrode of the first transistor.

3. The display panel according to claim 2 , wherein the first transistor of the each first voltage-regulating module is a P-type transistor.

4. The display panel according to claim 2 , wherein the first transistor of the each second voltage-regulating module is an N-type transistor.

5. The display panel according to claim 2 , wherein a threshold voltage VD of the first transistor, the turn-on voltage VB of the light-emitting component of the each first type sub-pixel and the turn-on voltage VRG of the light-emitting component of the each second type sub-pixel satisfy a formula: |VB-VRG|>|VB-VRG-VD|.

6. The display panel according to claim 5 , wherein the threshold voltage of the first transistor has a value comprised in a range of 0.2 V to 1.0 V.

7. The display panel according to claim 2 , wherein the pixel drive circuit comprises a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a seventh transistor and a storage capacitor;

the second transistor comprises a first electrode electrically connected to a data line, a second electrode electrically connected to a first electrode of the third transistor, and a gate electrically connected to a first scanning line;

the fourth transistor comprises a first electrode electrically connected to a second electrode of the third transistor, a second electrode electrically connected to a gate electrode of the third transistor, and a gate electrode electrically connected to the first scanning line;

the fifth transistor comprises a first electrode electrically connected to a second power supply voltage signal line, a second electrode electrically connected to the gate electrode of the third transistor, and a gate electrode electrically connected to a second scanning line;

the sixth transistor comprises a first electrode electrically connected to the second electrode of the third transistor, a second electrode electrically connected to a first end of the at least one of the first voltage-regulating module or the second voltage-regulating module, and a gate electrode electrically connected to a light-emitting signal line;

the seventh transistor comprises a first electrode electrically connected to a third power supply voltage signal line, a second electrode electrically connected to the first electrode of the third transistor, and a gate electrode electrically connected to the light-emitting signal line;

the storage capacitor comprises a first electrode electrically connected to the gate electrode of the third transistor, and a second electrode electrically connected to the first electrode of the third transistor.

8. The display panel according to claim 7 , wherein the second transistor, the third transistor, the fourth transistor, the fifth transistor, the sixth transistor and seventh transistor are all P-type transistors.

9. The display panel according to claim 7 , wherein a difference between a voltage of the third power supply voltage signal line and a voltage of the first power supply voltage signal line is greater than or equal to 9 V.

10. The display panel according to claim 1 , wherein the each second voltage-regulating module comprises a first diode, an anode of the first diode is electrically connected to an output end of the pixel drive circuit, a cathode of the first diode is electrically connected to the first end of the light-emitting component of the each first type sub-pixel; and the second end of the light-emitting component of the each first type sub-pixel is electrically connected to a first power supply voltage signal line.

11. The display panel according to claim 1 , wherein the each second voltage-regulating module comprises a first resistor, the first resistor is connected between an output end of the pixel drive circuit and a first end of the light-emitting component of the each second type sub-pixel; and a second end of the light-emitting component of the each second type sub-pixel is electrically connected to a first power supply voltage signal line.

12. The display panel according to claim 1 , wherein the preset value is greater than or equal to 0.1 V.

13. The display panel according to claim 1 , wherein the plurality of first type sub-pixels comprises a plurality of blue sub-pixels and the plurality of second type sub-pixels comprises at least one of a plurality of red sub-pixels or a plurality of green sub-pixels.

14. The display panel according to claim 1 , wherein the display panel is an organic light-emitting diode display panel.

15. The display panel of claim 14 , wherein the light-emitting component comprises:

a first electrode;

a second electrode disposed opposite to the first electrode;

a light-emitting layer disposed between the first electrode and the second electrode; and

at least one first common layer disposed between the first electrode and the light-emitting layer; wherein a plurality of the light-emitting components share the at least one first common layer; and

the first electrode is the first end of the light-emitting component.

16. A display device, comprising a display panel, wherein the display panel comprises:

a plurality of sub-pixels arranged in array, the plurality of sub-pixels each comprises a pixel drive circuit and a light-emitting component; the pixel drive circuit is configured to provide a driving current for the light-emitting component, and the light-emitting component is configured to emit light in response to the driving current;

the plurality of sub-pixels comprise a plurality of first type sub-pixels and a plurality of second type sub-pixels, a difference between a turn-on voltage of the light-emitting component of each first type sub-pixel of the plurality of first type sub-pixels and a turn-on voltage of the light-emitting component of each second type sub-pixel of the plurality of second type sub-pixels is greater than a preset value;

wherein the plurality of sub-pixels comprises at least one of a plurality of first voltage-regulating modules or a plurality of second voltage-regulating modules,

wherein the plurality of first voltage-regulating modules are comprised in the plurality of first type sub-pixels, each first voltage-regulating module of the plurality of first voltage-regulating modules is connected between the pixel drive circuit and a first end of the light-emitting component of the each first type sub-pixel and is configured to increase a voltage between the first end and a second end of the light-emitting component of the each first type sub-pixel;

wherein the plurality of second voltage-regulating modules are comprised in the plurality of second type sub-pixels, each second voltage-regulating module of the plurality of second voltage-regulating modules is connected between the pixel drive circuit and a first end of the light-emitting component of the each second type sub-pixel and is configured to reduce a voltage between the first end and a second end of the light-emitting component of the each second type sub-pixel,

wherein the first end and the second end of the light-emitting component are an anode and a cathode respectively.