US 2018/0322828 A1Published application

Pixel compensation circuit, scanning driving circuit and display device

AssigneeShenzhen China Star Optoelectronics Technology Co., Ltd.

InventorGuang LI

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Abstract

The disclosure provides a pixel compensation circuit, a scanning driving circuit and a display device. A control terminal of a first switch and that of a third switch are connected with a scanning line. A first terminal of the first switch is connected with a reference voltage terminal. A second terminal is connected with a first terminal of a second switch. A control terminal of the second switch and that of the fourth switch are connected with a light-emitting control terminal. A first terminal of the third switch is connected with the data cable. A second terminal is connected with a second terminal of the second switch and a control terminal of a driving switch. An anode of a diode is connected with a second terminal of the driving switch. A first terminal of the fourth switch is connected with a first voltage terminal.

Claims13

Dependent claims

A pixel compensation circuit, wherein the pixel compensation circuit comprises:

a first controllable switch, the first controllable switch comprises a control terminal, a first terminal and a second terminal, the control terminal of the first controllable switch is connected with a scanning line, the first terminal of the first controllable switch is connected with a reference voltage terminal;
a second controllable switch, the second controllable switch comprises a control terminal, a first terminal and a second terminal, the control terminal of the second controllable switch is connected with a light-emitting control terminal, the first terminal of the second controllable switch is connected with the second terminal of the first controllable switch;
a third controllable switch, the third controllable switch comprises a control terminal, a first terminal and a second terminal, the control terminal of the third controllable switch is connected with the scanning line, the first terminal of the third controllable switch is connected with a data cable, the second terminal of the third controllable switch is connected with the second terminal of the second controllable switch;
a driving switch, the driving switch comprises a control terminal, a first terminal and a second terminal, the control terminal of the driving switch is connected with the second terminal of the second controllable switch and the second terminal of the third controllable switch;
an organic light-emitting diode, the organic light-emitting diode comprises an anode and a cathode, the anode of the organic light-emitting diode is connected with the second terminal of the driving switch, the cathode of the organic light-emitting diode is connected with a ground;
a fourth controllable switch, the fourth controllable switch comprises a control terminal, a first terminal and a second terminal, the control terminal of the fourth controllable switch is connected with the light-emitting control terminal, the first terminal of the fourth controllable switch is connected with a first voltage terminal, the second terminal of the fourth controllable switch is connected with the first terminal of the driving switch;
and
a memory capacitor, the memory capacitor comprises a first terminal and a second terminal, the first terminal of the memory capacitor is connected with the second terminal of the first controllable switch and the first terminal of the second controllable switch, the second terminal of the memory capacitor is connected with the second terminal of the fourth controllable switch and the first terminal of the driving switch.

5 more elements

A scanning driving circuit, wherein the scanning driving circuit comprises a pixel compensation circuit, the pixel compensation circuit comprises:

a first controllable switch, the first controllable switch comprises a control terminal, a first terminal and a second terminal, the control terminal of the first controllable switch is connected with a scanning line, the first terminal of the first controllable switch is connected with a reference voltage terminal;
a second controllable switch, the second controllable switch comprises a control terminal, a first terminal and a second terminal, the control terminal of the second controllable switch is connected with a light-emitting control terminal, the first terminal of the second controllable switch is connected with the second terminal of the first controllable switch;
a third controllable switch, the third controllable switch comprises a control terminal, a first terminal and a second terminal, the control terminal of the third controllable switch is connected with the scanning line, the first terminal of the third controllable switch is connected with a data cable, the second terminal of the third controllable switch is connected with the second terminal of the second controllable switch;
a driving switch, the driving switch comprises a control terminal, a first terminal and a second terminal, the control terminal of the driving switch is connected with the second terminal of the second controllable switch and the second terminal of the third controllable switch;
an organic light-emitting diode, the organic light-emitting diode comprises an anode and a cathode, the anode of the organic light-emitting diode is connected with the second terminal of the driving switch, the cathode of the organic light-emitting diode is connected with a ground;
a fourth controllable switch, the fourth controllable switch comprises a control terminal, a first terminal and a second terminal, the control terminal of the fourth controllable switch is connected with the light-emitting control terminal, the first terminal of the fourth controllable switch is connected with a first voltage terminal, the second terminal of the fourth controllable switch is connected with the first terminal of the driving switch;
and
a memory capacitor, the memory capacitor comprises a first terminal and a second terminal, the first terminal of the memory capacitor is connected with the second terminal of the first controllable switch and the first terminal of the second controllable switch, the second terminal of the memory capacitor is connected with the second terminal of the fourth controllable switch and the first terminal of the driving switch.

5 more elements

A display device, wherein the display device comprises a scanning driving circuit, the scanning driving circuit comprises a pixel compensation circuit, the pixel compensation circuit comprises:

a first controllable switch, the first controllable switch comprises a control terminal, a first terminal and a second terminal, the control terminal of the first controllable switch is connected with a scanning line, the first terminal of the first controllable switch is connected with a reference voltage terminal;
a second controllable switch, the second controllable switch comprises a control terminal, a first terminal and a second terminal, the control terminal of the second controllable switch is connected with a light-emitting control terminal, the first terminal of the second controllable switch is connected with the second terminal of the first controllable switch;
a third controllable switch, the third controllable switch comprises a control terminal, a first terminal and a second terminal, the control terminal of the third controllable switch is connected with the scanning line, the first terminal of the third controllable switch is connected with a data cable, the second terminal of the third controllable switch is connected with the second terminal of the second controllable switch;
a driving switch, the driving switch comprises a control terminal, a first terminal and a second terminal, the control terminal of the driving switch is connected with the second terminal of the second controllable switch and the second terminal of the third controllable switch;
an organic light-emitting diode, the organic light-emitting diode comprises an anode and a cathode, the anode of the organic light-emitting diode is connected with the second terminal of the driving switch, the cathode of the organic light-emitting diode is connected with a ground;
a fourth controllable switch, the fourth controllable switch comprises a control terminal, a first terminal and a second terminal, the control terminal of the fourth controllable switch is connected with the light-emitting control terminal, the first terminal of the fourth controllable switch is connected with a first voltage terminal, the second terminal of the fourth controllable switch is connected with the first terminal of the driving switch;
and
a memory capacitor, the memory capacitor comprises a first terminal and a second terminal, the first terminal of the memory capacitor is connected with the second terminal of the first controllable switch and the first terminal of the second controllable switch, the second terminal of the memory capacitor is connected with the second terminal of the fourth controllable switch and the first terminal of the driving switch.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/541,369Filed 27 May 2017
Priority: CN 201710301473.92 May 2017
Published: 8 Nov 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

G09G 3/3258
Using an active matrix: with pixel circuitry controlling the voltage across the light-emitting element
G09G 3/3233
Using an active matrix: with pixel circuitry controlling the current through the light-emitting element
G09G 3/3266
Organic, e.g. using organic light-emitting diodes [OLED]: details of drivers for scan electrodes
G09G 2300/0819
Several active elements per pixel in active matrix panels: used for counteracting undesired variations, e.g. feedback or autozeroing

Family

US 10,460,664 B2Related patent
US 2018/0322828 A1This patent

From the US filing history. Foreign family members aren’t listed.

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