Granted Patent B2

US 12,367,805 · App. 17/266,662 · Granted Jul 22, 2025

Inventors: Wenfang Li (Guangdong, CN); Xianming Zhang (Guangdong, CN)

Assignee: TCL China Star Optoelectronics Technology Co., Ltd.

G09G3/2096G09G3/2007G09G3/36G09G3/3688G09G2320/0673

Abstract

Claims (26)

1. A data signal regulating circuit for a display panel, wherein the display panel comprises a plurality of source driver groups arranged sequentially in a predetermined direction, each of the source driver groups comprises a plurality of source driver units arranged sequentially in the predetermined direction, source driver units in the same source driver group output identical data signals, and any two adjacent ones of the source driver groups are correspondingly provided with an instance of the data signal regulating circuit;

the data signal regulating circuit comprises an electrically interconnected feedback unit and a regulating unit;

the feedback unit is further respectively electrically connected to any one of the source driver units in each of the two corresponding adjacent source driver groups, and configured to obtain data signal difference of the two adjacent source driver groups and output a feedback signal to the regulating unit based on the data signal difference; and

the regulating unit is further respectively electrically connected to each of the source driver units in the two corresponding adjacent source driver groups, and configured to respectively output a regulation signal to each of the source driver units in the two adjacent source driver groups, to regulate data signals output by the two adjacent source driver groups according to the feedback signal.

2. The data signal regulating circuit according to claim 1 , wherein the data signals output by the two adjacent source driver groups are identical after being regulated by the data signal regulating circuit.

3. The data signal regulating circuit according to claim 1 , wherein the feedback unit comprises an electrically interconnected operational amplifier and a comparator;

the operational amplifier is configured to detect and amplify the data signal difference of the two adjacent the source driver groups; and

the comparator is configured to compare magnitude of the amplified data signal difference with a reference voltage, and to output the feedback signal to the regulating unit when the amplified data signal difference deviates from the reference voltage.

4. The data signal regulating circuit according to claim 3 , wherein the feedback signal comprises a low voltage level signal.

5. The data signal regulating circuit according to claim 3 , wherein a first input and a second input of the operational amplifier are electrically connected to two corresponding adjacent the source driver groups, and an output of the operational amplifier is electrically connected to a first input of the comparator;

a second input of the comparator is connected to the reference voltage, and an output of the comparator is electrically connected to the regulating unit.

6. The data signal regulating circuit according to claim 1 , wherein the regulating unit comprises a timing control unit.

7. The data signal regulating circuit according to claim 1 , wherein the regulation signal comprises gray scale data.

8. A display device comprising a display panel and the data signal regulating circuit as claimed in claim 1 , the data signal regulating circuit being located on one side of the display panel.

9. The display device according to claim 8 , wherein the data signals output by the two adjacent source driver groups are identical after being regulated by the data signal regulating circuit.

10. The display device according to claim 8 , wherein the feedback unit comprises an electrically interconnected operational amplifier and a comparator;

the operational amplifier is configured to detect and amplify the data signal difference of the two adjacent the source driver groups; and

the comparator is configured to compare magnitude of the amplified data signal difference with a reference voltage, and to output the feedback signal to the regulating unit when the amplified data signal difference deviates from the reference voltage.

11. The display device according to claim 10 , wherein a first input and a second input of the operational amplifier are electrically connected to two corresponding adjacent the source driver groups, and wherein an output of the operational amplifier is electrically connected to a first input of the comparator;

a second input of the comparator is connected to the reference voltage, and an output of the comparator is electrically connected to the regulating unit.

12. The display device according to claim 8 , wherein the regulating unit comprises a timing control unit.

13. The display device according to claim 8 , wherein the display device further comprises a plurality of printed circuit boards arranged sequentially in the predetermined direction, the plurality of source driver groups being provided on the plurality of printed circuit boards in one to one correspondence; and

the feedback unit and any one of the two adjacent the source driver groups are provided on the same the printed circuit board.

14. The display device according to claim 13 , wherein the display device further comprises a gamma voltage generation unit electrically connected to the plurality of printed circuit boards, the gamma voltage generation unit provides a raw gamma signal to each of the plurality of source driver groups through the plurality of printed circuit boards.

15. The display device according to claim 13 , wherein at least two adjacent printed circuit boards are electrically interconnected through a flexible line.

16. The display device according to claim 8 , wherein the regulation signal comprises gray scale data.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (33)