US 2019/0156748 A1Published application

Pixel driving circuit, driving method and display panel

AssigneeShenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd.

InventorYufeng JIN

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Abstract

A pixel driving circuit, a driving method and a display panel are provided. The driving circuit includes first switch, second switch and third switch, first capacitor and second capacitor, and light emitting element. A control terminal of first switch is coupling to first control signal, inputting terminal is coupling to data signal, outputting terminal is coupling to first terminal of first capacitor and control terminal of third switch. A control terminal of second switch is coupling to second control signal, inputting terminal is coupling to data signal, outputting terminal is coupling to second terminal of first capacitor and first terminal of second capacitor. An inputting terminal of third switch is coupling to power source positive voltage, outputting terminal is coupling to second terminal of second capacitor and first terminal of light emitting element. A second terminal of light emitting element is electrically connecting power source negative voltage.

Claims16

Dependent claims

A driving method of pixel driving circuit, the pixel driving circuit comprising a first switch, a second switch and a third switch, a first capacitor and a second capacitor, and a light emitting element;

a control terminal of the first switch is coupling to a first control signal, an inputting terminal of the first switch is coupling to a data signal, an outputting terminal of the first switch is coupling to a first terminal of the first capacitor and a control terminal of the third switch;
a control terminal of the second switch is coupling to a second control signal, an inputting terminal of the second switch is coupling to the data signal, an outputting terminal of the second switch is coupling to a second terminal of the first capacitor and a first terminal of the second capacitor;
an inputting terminal of the third switch is coupling to a power source positive voltage, an outputting terminal of the third switch is coupling to a second terminal of the second capacitor and a first terminal of the light emitting element;
a second terminal of the light emitting element is electrically connecting a power source negative voltage;
the driving method comprising:
in a first stage, the first control signal providing high potential, switching on the first switch, the second control signal providing low potential, switching off the second switch;
in a second stage, the first control signal providing low potential, switching off the first switch, the second control signal providing high potential, switching on the second switch;
in a third stage, the first control signal providing low potential, switching off the first switch, the second control signal providing low potential, switching off the second switch.

5 more elements

A pixel driving circuit, the driving circuit comprising a first switch, a second switch and a third switch, a first capacitor and a second capacitor, and a light emitting element;

a control terminal of the first switch is coupling to a first control signal, an inputting terminal of the first switch is coupling to a data signal, an outputting terminal of the first switch is coupling to a first terminal of the first capacitor and a control terminal of the third switch;
a control terminal of the second switch is coupling to a second control signal, an inputting terminal of the second switch is coupling to the data signal, an outputting terminal of the second switch is coupling to a second terminal of the first capacitor and a first terminal of the second capacitor;
an inputting terminal of the third switch is coupling to a power source positive voltage, an outputting terminal of the third switch is coupling to a second terminal of the second capacitor and a first terminal of the light emitting element;
a second terminal of the light emitting element is electrically connecting a power source negative voltage.

1 more element

A display panel, wherein the display panel comprising a pixel driving circuit;

the driving circuit comprising a first switch, a second switch and a third switch, a first capacitor and a second capacitor, and a light emitting element;
a control terminal of the first switch is coupling to a first control signal, an inputting terminal of the first switch is coupling* to a data signal, an outputting terminal of the first switch is coupling to a first terminal of the first capacitor and a control terminal of the third switch;
a control terminal of the second switch is coupling to a second control signal, an inputting terminal of the second switch is coupling to the data signal, an outputting terminal of the second switch is coupling to a second terminal of the first capacitor and a first terminal of the second capacitor;
an inputting terminal of the third switch is coupling to a power source positive voltage, an outputting terminal of the third switch is coupling to a second terminal of the second capacitor and a first terminal of the light emitting element;
a second terminal of the light emitting element is electrically connecting a power source negative voltage.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/742,286Filed 21 Dec 2017
Priority: CN 201711161347.420 Nov 2017
Published: 23 May 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 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 2300/0819
Several active elements per pixel in active matrix panels: used for counteracting undesired variations, e.g. feedback or autozeroing
G09G 2300/0852
Forming a memory circuit, e.g. a dynamic memory with one capacitor: being a dynamic memory with more than one capacitor

Family

No related US applications are recorded in the indexed filing history.

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