Organic light-emitting pixel driving circuit, driving method and organic light-emitting display panel

Patent metadata

Field	Value
Publication number	US-10373557-B2
Application number	US-201715636455-A
Country	US
Kind code	B2
Filing date	Jun 28, 2017
Priority date	Jan 25, 2017
Publication date	Aug 6, 2019
Grant date	Aug 6, 2019

Abstract

The present application discloses an organic light-emitting pixel driving circuit, a driving method and an organic light-emitting display panel. The organic light-emitting pixel driving circuit comprises: a first transistor provides an initialization signal to an anode of the organic light-emitting diode and a gate of the driving transistor; a second transistor compensates a threshold voltage of the driving transistor; a third transistor provides a data signal to the driving transistor; a fourth transistor transmits a first power supply voltage to the driving transistor; a fifth transistor controls electrical connection between the driving transistor and the organic light-emitting diode based on a signal of the second light-emission controlling signal terminal; a capacitor is used to store the data signal transmitted to the driving transistor; an organic light-emitting diode is used to emit light in response to the driving current generated by the driving transistor.

First claim

What is claimed is:

1. An organic light-emitting pixel driving circuit, comprising:
a first scanning signal terminal, a second scanning signal terminal, a first light-emission controlling signal terminal, a second light-emission controlling signal terminal, a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a diving transistor, an organic light-emitting diode, a first power supply voltage terminal, and a data signal terminal and a capacitor;
wherein the first transistor provides an initialization signal to an anode of the organic light-emitting diode and a gate of the driving transistor based on a signal from the first scanning signal terminal;
wherein the second transistor compensates a threshold voltage of the driving transistor based on a signal from the second scanning signal terminal, a gate of the second transistor is connected with the second scanning signal terminal, a first electrode of the second transistor is connected with a second electrode of the driving transistor, and a second electrode of the second transistor is connected with the gate of the driving transistor;
wherein the third transistor provides a data signal to the driving transistor based on a signal from the second scanning signal terminal, a gate of the third transistor is connected with the second scanning signal terminal, a first electrode of the third transistor is connected with the data signal terminal, and a second electrode of the third transistor is connected with the first electrode of the driving transistor;
wherein the fourth transistor transmits a first power supply voltage to the driving transistor based on a signal from the first light-emission controlling signal terminal;
wherein the fifth transistor is coupled in series between the driving transistor and the anode of the organic light-emitting diode, and controls electrical connection between the driving transistor and the organic light-emitting diode based on a signal from the second light-emission controlling signal terminal, a gate of the fifth transistor is connected with the second light-emission controlling signal terminal, a first electrode of the fifth transistor is connected with the second electrode of the driving transistor, and a second electrode of the fifth transistor is connected with the anode of the organic light emitting diode;
wherein the capacitor is connected to the first power supply voltage terminal, and configured to store the data signal transmitted to the driving transistor; and
wherein the organic light-emitting diode is configured to emit light in response to a driving current generated by the driving transistor.

2. The organic light-emitting pixel driving circuit according to claim 1 , wherein the first transistor and second transistor are dual-gate transistors.

3. The organic light-emitting pixel driving circuit according to claim 1 , further comprising an initialization signal terminal, wherein a gate of the first transistor is connected with the first scanning signal terminal, a first electrode of the first transistor is connected with the initialization signal terminal, and a second electrode of the first transistor is connected with the second electrode of the driving transistor, and a width-length ratio of electrically conductive channels of the first transistor and second transistor is smaller than a width-length ratio of electrically conductive channels of the third transistor, fourth transistor and fifth transistor.

4. The organic light-emitting pixel driving circuit according to claim 1 , wherein the initialization signal is a signal received by the first scanning signal terminal.

5. The organic light-emitting pixel driving circuit according to claim 4 , further comprising a second power supply voltage terminal;
wherein a gate of the first transistor and a first electrode of the first transistor are both connected with the first scanning signal terminal, and a second electrode of the first transistor is connected with a second electrode of the driving transistor;
wherein a gate of the second transistor is connected with the second scanning signal terminal, a first electrode of the second transistor is connected with a second electrode of the driving transistor, and a second electrode of the second transistor is connected with the gate of the driving transistor;
wherein a gate of the third transistor is connected with the second scanning signal terminal, a first electrode of the third transistor is connected with the data signal terminal, and a second electrode of the third transistor is connected with the first electrode of the driving transistor;
wherein a gate of the fourth transistor is connected with the first light-emission controlling signal terminal, a first electrode of the fourth transistor is connected with the first power supply voltage terminal, and a second electrode of the fourth transistor is connected with the first electrode of the driving transistor;
wherein a gate of the fifth transistor is connected with the second light-emission controlling signal terminal, a first electrode of the fifth transistor is connected with the second electrode of the driving transistor, and a second electrode of the fifth transistor is connected with the anode of the organic light-emitting diode;
wherein a terminal of the capacitor is connected to the first power supply voltage terminal, and another terminal of the capacitor is connected to the gate of the driving transistor; and
wherein a cathode of the organic light-emitting diode is connected to the second power supply voltage terminal.

6. The organic light-emitting pixel driving circuit according to claim 1 , further comprising an initialization signal terminal, wherein the initialization signal is a signal transmitted from the initialization signal terminal.

7. The organic light-emitting pixel driving circuit according to claim 6 , further comprising a data signal terminal, a first power supply voltage terminal and a second power supply voltage terminal;
wherein a gate of the first transistor is connected with the first scanning signal terminal, a first electrode of the first transistor is connected with the initialization signal terminal, and a second electrode of the first transistor is connected with a second electrode of the driving transistor;
wherein a gate of the second transistor is connected with the second scanning signal terminal, a first electrode of the second transistor is connected with the second electrode of the driving transistor, and a second electrode of the second transistor is connected with the gate of the driving transistor;
wherein a gate of the third transistor is connected with the second scanning signal terminal, a first electrode of the third transistor is connected with the data signal terminal, and a second electrode of the third transistor is connected with the first electrode of the driving transistor;
wherein a gate of the fourth transistor is connected with the first light-emission controlling signal terminal, a first electrode of the fourth transistor is connected with the first power supply voltage terminal, and a second electrode of the fourth transistor is connected with the first electrode of the driving transistor;
wherein a gate of the fifth transistor is connected to the second light-emission controlling signal terminal, a first electrode of the fifth transistor is connected to the second electrode of the driving transistor, and a second electrode of the fifth transistor is connected with the anode of the organic light-emitting diode;
wherein a terminal of the capacitor is connected to the first power supply voltage terminal, and another terminal of the capacitor is connected to the gate of the driving transistor; and
wherein a cathode of the

Assignees

• Shanghai Tianma Am Oled Co Ltd

Inventors

• Zhu Renyuan
• Li Yue
• Wu Tong
• Xiang Dongxu
• Chen Zeyuan

Classifications

• G09G3/3258

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

• G09G2320/0626

  for control of overall brightness · CPC title

• H01L29/78696

  Electricity · mapped topic

• H01L27/3248

  Electricity · mapped topic

• G09G2300/0819

  used for counteracting undesired variations, e.g. feedback or autozeroing · CPC title