Method for driving display device

Patent metadata

Field	Value
Publication number	US-10872567-B2
Application number	US-201816324309-A
Country	US
Kind code	B2
Filing date	Mar 6, 2018
Priority date	Mar 10, 2017
Publication date	Dec 22, 2020
Grant date	Dec 22, 2020

Abstract

The present application discloses a method for driving a display apparatus. The display apparatus includes an OLED and a driver transistor. An anode of the OLED is connected to a source of the driver transistor, a drain of the driver transistor is connected to a positive power supply, a cathode of the OLED is connected to a negative power supply, and a voltage difference between the positive power supply and the negative power supply is in a range from 7.1 V to 9.6 V.

First claim

What is claimed is:

1. A method for driving a display apparatus, wherein the display apparatus comprises an OLED, a driver transistor and first to fourth switch transistors, the method comprising:
connecting a source of the first switch transistor to a data signal power supply, connecting a drain of the first switch transistor to a drain of the driver transistor and connecting a gate of the first switch transistor to a second scan power supply; connecting a source of the second switch transistor to the drain of the driver transistor, connecting a drain of the second switch transistor to a positive power supply and connecting a gate of the second switch transistor to an emission power supply; connecting a source of the third switch transistor to a reference power supply, connecting a drain of the third switch transistor to a gate of the driver transistor and connecting a gate of the third switch transistor to a first scan power supply; connecting a source of the fourth switch transistor to a gate of the driver transistor, connecting a drain of the fourth switch transistor to a source of the fifth switch transistor and connecting a gate of the fourth switch transistor to the second scan power supply;
connecting a cathode of the OLED to a negative power supply; and
conducting a voltage difference between the positive power supply and the negative power supply in a range from 7.1 V to 9.6 V.

2. The method for driving a display apparatus according to claim 1 , wherein a voltage provided by the positive power supply has a fixed value, and a voltage provided by the negative power supply is an adjustable voltage.

3. The method for driving a display apparatus according to claim 2 , wherein the voltage provided by the positive power supply ranges from 4 V to 5 V.

4. The method for driving a display apparatus according to claim 2 , wherein the voltage provided by the negative power supply ranges from −5 V to −2.5 V.

5. The method for driving a display apparatus according to claim 2 , wherein the voltage difference between the positive power supply and the negative power supply is configured in a range from 8.1 V to 9.1 V.

6. The method for driving a display apparatus according to claim 5 , wherein the voltage provided by the negative power supply ranges from −4.5 V to −3.5 V.

7. The method for driving a display apparatus according to claim 1 , wherein a voltage provided by the positive power supply is an adjustable voltage, and a voltage provided by the negative power supply has a fixed value.

8. The method for driving a display apparatus according to claim 1 , wherein a drain-source voltage of the driver transistor is as follows:
V ds =a voltage of the positive power supply−a voltage of the negative power supply−V oled ,
V ds is the drain-source voltage of the driver transistor, and V oled is a voltage between two terminals of the OLED.

9. The method for driving a display apparatus according to claim 1 , wherein the display apparatus further comprises a capacitor, a gate of the driver transistor connected to the positive power supply through the capacitor.

10. The method for driving a display apparatus according to claim 1 , further comprising: connecting a source of the fifth switch transistor to a source of the driver transistor, connecting a drain of the fifth switch transistor to an anode of the OLED and connecting a gate of the fifth switch transistor to the emission power supply; connecting a source of the sixth switch transistor to a reference power supply, connecting a drain of the sixth switch transistor to the anode of the OLED and connecting a gate of the sixth switch transistor to the first scan power supply.

Assignees

• Kunshan Govisionox Optoelectronics Co Ltd

Inventors

• Zhang Shuhuan
• Jiang Haibin
• Chen Xinquan

Classifications

• G09G3/3233 Primary

  with pixel circuitry controlling the current through the light-emitting element · CPC title

• G09G3/3208 Primary

  organic, e.g. using organic light-emitting diodes [OLED] · CPC title

• G09G2310/027

  Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters · CPC title

• G09G2330/02

  Details of power systems and of start or stop of display operation · CPC title

• G09G3/3258 Primary

  with pixel circuitry controlling the voltage across the light-emitting element · CPC title