Backlight board and driving method thereof, backlight module and driving method thereof, and display device

Patent metadata

Field	Value
Publication number	US-11875756-B2
Application number	US-202318136018-A
Country	US
Kind code	B2
Filing date	Apr 18, 2023
Priority date	Apr 28, 2022
Publication date	Jan 16, 2024
Grant date	Jan 16, 2024

Abstract

Provided are a backlight board and a driving method thereof, a backlight module and a driving method thereof, and a display device. The backlight board includes light-emitting devices arranged in rows and columns and a first connector, where each first pin of the first connector is electrically connected to first electrodes of light-emitting devices in one row, each second pin of the first connector is electrically connected to second electrodes of light-emitting devices in one column; and in one drive cycle, a first drive signal drives light-emitting devices in each row for a duration T/n at different times, and a second drive signal drives light-emitting devices in each column for a duration T/n at different times.

First claim

What is claimed is:

1. A backlight module, comprising:
a drive unit, a second connector and a backlight board;

wherein the backlight board comprises light-emitting devices arranged in rows and columns and a first connector, wherein the first connector comprises n first pins and m second pins, each of the n first pins is electrically connected to first electrodes of light-emitting devices in a respective one row of the rows and is configured to provide a first drive signal for the light-emitting devices in the respective one row, and each of the m second pins is electrically connected to second electrodes of light-emitting devices in a respective one column of the columns and is configured to provide a second drive signal for the light-emitting devices in the respective one column; and in one drive cycle, the first drive signal drives light-emitting devices in each of the rows for a duration T/n at different times, and the second drive signal drives light-emitting devices in each of the columns for a duration T/n at different times, wherein T denotes time of one drive cycle, n denotes a number of the rows of the light-emitting devices, and m denotes a number of the columns of the light-emitting devices; and
wherein the second connector comprises n third pins and m fourth pins, each of the n third pins is electrically connected to a respective one first pin of the n first pins, each of the m fourth pins is electrically connected to a respective one second pin of the m second pins, and the drive unit is connected to the second connector and is configured to provide drive signals to the light-emitting devices through the second connector and the first connector.

2. The backlight module according to claim 1 , wherein the first connector is a receptacle of a connector and the second connector is a plug of the connector paired with the receptacle of the connector.

3. The backlight module according to claim 2 , further comprising:
a driver board on which the drive unit and the second connector are disposed, wherein the second connector is plugged into the first connector.

4. The backlight module according to claim 1 , wherein the backlight board further comprises a substrate, first connection lines disposed on the substrate and second connection lines disposed on the substrate, wherein the light-emitting devices are disposed on one surface of the substrate, and the first connector is disposed on another surface of the substrate; each of the n first pins is electrically connected to the first electrodes of the light-emitting devices in the respective one row through a respective one first connection line of the first connection lines, and each of the m second pins is electrically connected to the second electrodes of the light-emitting devices in the respective one column through a respective one second connection line of the second connection lines.

5. The backlight module according to claim 4 , wherein the backlight board further comprises a support structure, wherein the support structure and the light-emitting devices are located on a same surface of the substrate.

6. The backlight module according to claim 1 , wherein in one drive cycle, the second drive signal comprises 2 n types of timing arrangement modes.

7. A driving method of a backlight module, applied to driving the backlight module according to claim 1 , and comprising:
providing, by the drive unit, first drive signals for third pins while providing second drive signals for fourth pins; and
transmitting, by the third pins, the first drive signals to first electrodes of the light-emitting devices through first pins, and transmitting, by the fourth pins, the second drive signals to second electrodes of the light-emitting devices through second pins.

8. A display device, comprising: a backlight module which comprises a drive unit, a second connector and a backlight board;
wherein the backlight board comprises light-emitting devices arranged in rows and columns and a first connector, wherein the first connector comprises n first pins and m second pins, each of the n first pins is electrically connected to first electrodes of light-emitting devices in a respective one row of the rows and is configured to provide a first drive signal for the light-emitting devices in the respective one row, and each of the m second pins is electrically connected to second electrodes of light-emitting devices in a respective one column of the columns and is configured to provide a second drive signal for the light-emitting devices in the respective one column; and in one drive cycle, the first drive signal drives light-emitting devices in each of the rows for a duration T/n at different times, and the second drive signal drives light-emitting devices in each of the columns for a duration T/n at different times, wherein T denotes time of one drive cycle, n denotes a number of the rows of the light-emitting devices, and m denotes a number of the columns of the light-emitting devices; and
wherein the second connector comprises n third pins and m fourth pins, each of the n third pins is electrically connected to a respective one first pin of the n first pins, each of the m fourth pins is electrically connected to a respective one second pin of the m second pins, and the drive unit is connected to the second connector and is configured to provide drive signals to the light-emitting devices through the second connector and the first connector.

9. The display device according to claim 8 , wherein the first connector is a receptacle of a connector and the second connector is a plug of the connector paired with the receptacle of the connector.

10. The display device according to claim 9 , wherein the backlight module further comprises a driver board on which the drive unit and the second connector are disposed, wherein the second connector is plugged into the first connector.

11. The display device according to claim 8 , wherein the backlight board further comprises a substrate, first connection lines disposed on the substrate and second connection lines disposed on the substrate, wherein the light-emitting devices are disposed on one surface of the substrate, and the first connector is disposed on another surface of the substrate; each of the n first pins is electrically connected to the first electrodes of the light-emitting devices in the respective one row through a respective one first connection line of the first connection lines, and each of the m second pins is electrically connected to the second electrodes of the light-emitting devices in the respective one column through a respective one second connection line of the second connection lines.

12. The display device according to claim 11 , wherein the backlight board further comprises a support structure, wherein the support structure and the light-emitting devices are located on a same surface of the substrate.

13. The display device according to claim 8 , wherein in one drive cycle, the second drive signal comprises 2 n types of timing arrangement modes.

14. A backlight board, comprising:
light-emitting devices arranged in rows and columns and a first connector, wherein the first connector comprises n first pins and m second pins, each of the n first pins is electrically connected to first electrodes of light-emitting devices in a respective one row of the rows and is configured to provide a first drive signal for the light-emitting devices in the respective one row, and each of the m second pins is electrically connected to second electrodes of light-emitting devices in a respective one column of the columns and is configured to provide a second driv

Assignees

• Foshan Nationstar Optoelectronics Co Ltd

Inventors

• Chen Weineng
• Chen Xiang
• Zheng Dequan
• Yan Zhonghai
• Liu Fabo
• Gong Danlei
• Fan Hua

Classifications

• H10W90/00

  Package configurations · CPC title

• G09G3/342 Primary

  using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines · CPC title

• G09G2300/0426

  Layout of electrodes and connections · CPC title

• G09G2310/08

  Details of timing specific for flat panels, other than clock recovery · CPC title

• G09G2320/0626

  for control of overall brightness · CPC title