Granted Patent B2

US 12,243,460 · App. 18/528,719 · Granted Mar 4, 2025

Inventors: Yuheng Zhang (Wuhan, CN); Jiemiao Pan (Wuhan, CN)

Assignee: Hubei Yangtze Industrial Innovation Center Of Advanced Display Co., Ltd.

G09G3/20G09G3/3233G09G2300/0819G09G2300/0842G09G2310/0237G09G2310/08G09G2320/0233G09G2320/0626G09G2330/023

Abstract

Claims (89)

1. A display panel, comprising:

a pixel circuit and a light emitting element;

wherein the pixel circuit comprises a drive module, and a bias adjustment module; wherein

the drive module comprises a drive transistor;

wherein the bias adjustment module is configured to provide a bias adjustment signal to a first pole of the drive transistor or a second pole of the drive transistor;

wherein:

data refresh frequencies of the display panel comprise a first data refresh frequency F 1 and a second data refresh frequency F 2 , wherein F 1 >F 2 ;

at the first data refresh frequency F 1 , the bias adjustment signal is Vf 1 , and at the second data refresh frequency F 2 , the bias adjustment signal is Vf 2 , wherein Vf 1 ≠Vf 2 ; and

an operation process of the pixel circuit comprises a data writing frame and a holding frame;

the bias adjustment signal is Vf 11 in the data writing frame at the first data refresh frequency F 1 , and the bias adjustment signal is Vf 12 in the data writing frame at the second data refresh frequency F 2 ; the bias adjustment signal is Vf 21 in the holding frame at the first data refresh frequency F 1 , and the bias adjustment signal is Vf 22 in the holding frame at the second data refresh frequency F 2 ; and |Vf 11 −Vf 12 |=|Vf 21 −Vf 22 |;

or, wherein:

data refresh frequencies of the display panel comprise a first data refresh frequency F 1 and a second data refresh frequency F 2 , wherein F 1 >F 2 ;

at the first data refresh frequency F 1 , the bias adjustment signal is Vf 1 , and at the second data refresh frequency F 2 , the bias adjustment signal is Vf 2 , wherein Vf 1 #Vf 2 ; and

an operation process of the pixel circuit comprises a data writing frame and a holding frame;

the bias adjustment signal is Vf 11 in the data writing frame at the first data refresh frequency F 1 , and the bias adjustment signal is Vf 12 in the data writing frame at the second data refresh frequency F 2 ; the bias adjustment signal is Vf 21 in the holding frame at the first data refresh frequency F 1 , and the bias adjustment signal is Vf 22 in the holding frame at the second data refresh frequency F 2 ; and |Vf 11 −Vf 12 |>| Vf 21 −Vf 22 |, or,

|Vf 11 −Vf 12 |<|Vf 21 −Vf 22 |;

or, wherein:

data refresh frequencies of the display panel comprise a first data refresh frequency F 1 and a second data refresh frequency F 2 , wherein F 1 >F 2 ; and

at the first data refresh frequency F 1 , a duration of a bias adjustment stage in one data refresh period is T 1 , and at the second data refresh frequency F 2 , a duration of a bias adjustment stage in one data refresh period is T 2 , wherein T 1 ≠T 2 .

2. The display panel according to claim 1 , wherein Vf 1 <Vf 2 .

3. The display panel according to claim 1 , wherein Vf 1 >Vf 2 .

4. The display panel according to claim 1 , wherein

the data refresh frequencies of the display panel comprises a first data refresh frequency band and a second data refresh frequency band, and a frequency within the first data refresh frequency band is greater than a frequency within the second data refresh frequency band,

and

the bias adjustment signal within the first data refresh frequency band is greater than the bias adjustment signal within the second data refresh frequency band.

5. The display panel according to claim 4 , wherein

a difference between a maximum data refresh frequency within the first data refresh frequency band and a minimum data refresh frequency within the first data refresh frequency band is ΔF 1 , and a difference between a maximum data refresh frequency within the second data refresh frequency band and a minimum data refresh frequency within the second data refresh frequency band is ΔF 2 ; and

wherein ΔF 1 >ΔF 2 .

6. The display panel according to claim 1 , wherein T 1 >T 2 .

7. The display panel according to claim 1 , wherein T 1 <T 2 .

8. The display panel according to claim 1 , wherein

at the first data refresh frequency F 1 , a duration of the bias adjustment stage within one image frame is t 1 , and at the second data refresh frequency F 2 , a duration of the bias adjustment stage within one image frame is t 2 ; and

wherein t 1 ≠t 2 .

9. The display panel according to claim 8 , wherein t 1 >t 2 .

10. The display panel according to claim 8 , wherein t 1 <t 2 .

11. The display panel according to claim 1 , wherein

the pixel circuit further comprises a reset module and a compensation module, the reset module is configured to provide a reset signal to the drive transistor, and the compensation module is connected between a gate of the drive transistor and the second pole of the drive transistor; and

wherein the reset module is connected to the gate of the drive transistor, and the reset module is configured to provide a reset signal to the gate of the drive transistor in a reset stage; or,

the reset module is connected to the first pole of the drive transistor or the second pole of the drive transistor, the reset module is served as the bias adjustment module, and, the reset module is configured to provide a bias adjustment signal to the first pole of the drive transistor or the second pole of the drive transistor in the bias adjustment stage.

12. An integrated chip, configured to provide a bias adjustment signal to the display panel according to claim 1 .

13. A display panel, comprising:

a pixel circuit and a light emitting element;

wherein the pixel circuit comprises a drive module, and a bias adjustment module;

wherein the drive module comprises a drive transistor;

wherein the bias adjustment module is configured to provide a bias adjustment signal to a first pole of the drive transistor or a second pole of the drive transistor;

wherein:

data refresh frequencies of the display panel comprise a first data refresh frequency F 1 and a second data refresh frequency F 2 , wherein F 1 >F 2 ;

at the first data refresh frequency F 1 , the bias adjustment signal is Vf 1 , and at the second data refresh frequency F 2 , the bias adjustment signal is Vf 2 , wherein Vf 1 ≠Vf 2 ; and

an operation process of the pixel circuit comprises a data writing frame and a holding frame;

the bias adjustment signal is Vf 11 in the data writing frame at the first data refresh frequency F 1 , and the bias adjustment signal is Vf 12 in the data writing frame at the second data refresh frequency F 2 ; the bias adjustment signal is Vf 21 in the holding frame at the first data refresh frequency F 1 , and the bias adjustment signal is Vf 22 in the holding frame at the second data refresh frequency F 2 ; and |Vf 11 −Vf 12 |=|Vf 21 −Vf 22 |;

or, wherein:

data refresh frequencies of the display panel comprise a first data refresh frequency F 1 and a second data refresh frequency F 2 , wherein F 1 >F 2 ;

at the first data refresh frequency F 1 , the bias adjustment signal is Vf 1 , and at the second data refresh frequency F 2 , the bias adjustment signal is Vf 2 , wherein Vf 1 ≠Vf 2 ; and

an operation process of the pixel circuit comprises a data writing frame and a holding frame;

the bias adjustment signal is Vf 11 in the data writing frame at the first data refresh frequency F 1 , and the bias adjustment signal is Vf 12 in the data writing frame at the second data refresh frequency F 2 ; the bias adjustment signal is Vf 21 in the holding frame at the first data refresh frequency F 1 , and the bias adjustment signal is Vf 22 in the holding frame at the second data refresh frequency F 2 ; and |Vf 11 −Vf 12 |>|Vf 21 −Vf 22 |, or,

|Vf 11 −Vf 12 |<|Vf 21 −Vf 22 |;

or, wherein:

data refresh frequencies of the display panel comprise a first data refresh frequency F 1 and a second data refresh frequency F 2 , wherein F 1 >F 2 ; and

at the first data refresh frequency F 1 , a duration of a bias adjustment stage in one data refresh period is T 1 , and at the second data refresh frequency F 2 , a duration of a bias adjustment stage in one data refresh period is T 2 , wherein T 1 ≠T 2 .

14. The display panel according to claim 13 , wherein t 1 >t 2 , or, t 1 <t 2 .

15. The display panel according to claim 13 , wherein Vf 1 <Vf 2 , or, Vf 1 >Vf 2 .

16. The display panel according to claim 13 , wherein

the data refresh frequencies of the display panel comprises a first data refresh frequency band and a second data refresh frequency band, and a frequency within the first data refresh frequency band is greater than a frequency within the second data refresh frequency band,

and

the bias adjustment signal within the first data refresh frequency band is greater than the bias adjustment signal within the second data refresh frequency band.

17. The display panel according to claim 13 , wherein

at the first data refresh frequency F 1 , a duration of the bias adjustment stage within one image frame is t 1 , and at the second data refresh frequency F 2 , a duration of the bias adjustment stage within one image frame is t 2 ; and

wherein t 1 ≠t 2 .

18. An integrated chip, configured to provide a bias adjustment signal to the display panel according to claim 13 .

19. A display apparatus, comprising the display panel according to claim 13 .

20. A display apparatus, comprising a display panel, wherein the display panel comprises:

a pixel circuit and a light emitting element;

wherein the pixel circuit comprises a drive module, and a bias adjustment module; wherein

the drive module comprises a drive transistor;

wherein the bias adjustment module is configured to provide a bias adjustment signal to a first pole of the drive transistor or a second pole of the drive transistor;

wherein:

data refresh frequencies of the display panel comprise a first data refresh frequency F 1 and a second data refresh frequency F 2 , wherein F 1 >F 2 ;

at the first data refresh frequency F 1 , the bias adjustment signal is Vf 1 , and at the second data refresh frequency F 2 , the bias adjustment signal is Vf 2 , wherein Vf 1 ≠Vf 2 ; and

an operation process of the pixel circuit comprises a data writing frame and a holding frame;

the bias adjustment signal is Vf 11 in the data writing frame at the first data refresh frequency F 1 , and the bias adjustment signal is Vf 12 in the data writing frame at the second data refresh frequency F 2 ; the bias adjustment signal is Vf 21 in the holding frame at the first data refresh frequency F 1 , and the bias adjustment signal is Vf 22 in the holding frame at the second data refresh frequency F 2 ; and |Vf 11 −Vf 12 |=|Vf 21 −Vf 22 |;

or, wherein:

data refresh frequencies of the display panel comprise a first data refresh frequency F 1 and a second data refresh frequency F 2 , wherein F 1 >F 2 ;

at the first data refresh frequency F 1 , the bias adjustment signal is Vf 1 , and at the second data refresh frequency F 2 , the bias adjustment signal is Vf 2 , wherein Vf 1 ≠Vf 2 ; and

an operation process of the pixel circuit comprises a data writing frame and a holding frame;

the bias adjustment signal is Vf 11 in the data writing frame at the first data refresh frequency F 1 , and the bias adjustment signal is Vf 12 in the data writing frame at the second data refresh frequency F 2 ; the bias adjustment signal is Vf 21 in the holding frame at the first data refresh frequency F 1 , and the bias adjustment signal is Vf 22 in the holding frame at the second data refresh frequency F 2 ; and |Vf 11 −Vf 12 |>| Vf 21 −Vf 22 |, or,

|Vf 11 −Vf 12 |<|Vf 21 −Vf 22 |;

or, wherein:

data refresh frequencies of the display panel comprise a first data refresh frequency F 1 and a second data refresh frequency F 2 , wherein F 1 >F 2 ; and

at the first data refresh frequency F 1 , a duration of a bias adjustment stage in one data refresh period is T 1 , and at the second data refresh frequency F 2 , a duration of a bias adjustment stage in one data refresh period is T 2 , wherein T 1 ≠T 2 .

Assignments (1)

Priority Claims (1)

Continuity (2)

References Cited (11)

Cited By (1)

US 12,494,161