US 2022/0189414 A1Published application

Pixel driving circuit, display panel and display device

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

InventorsHuasheng SU, Jianhang FU

Life of this patent

Estimating the term…

Loading patent…

Abstract

A pixel driving circuit, a display panel and a display device are provided. The pixel driving circuit includes a first control module electrically connected to a first node. The first control module receives the first control signal and the first power voltage. The first control module is used to write the first power voltage into the first node under the control of the first control signal when the voltage of the first control signal is higher than the first predetermined threshold voltage. Because the first power voltage is written into the first node to control the lighting device to generate light when the first control signal is higher than the first predetermined threshold voltage, this could prevent the lighting device from generating the color shift. In this way, the requirement for the chip performance is comparatively low and thus the manufacturing cost is reduced.

Claims20

Dependent claims

A pixel driving circuit, configured to drive a lighting device to generate light, the pixel driving circuit comprising:

a driving transistor, having a gate, a source and a drain, wherein the drain of the driving transistor is electrically connected to a first end of the lighting device;
a data writing module, electrically connected to the gate of the driving transistor, configured to receive a scan signal and a data signal and to write the data signal to the gate of the driving transistor under a control of the scan signal;
a first control module, electrically connected to a first node, configured to receive a first control signal and a first power voltage and to write the first power voltage into the first node under a control of the first control signal when the first control signal is larger than a first predetermined threshold voltage;
a compensation module, electrically connected to the source of the driving transistor, configured to receive a third power voltage and to input the third power voltage to the source of the driving transistor under a control of the first power voltage, wherein the third power voltage is higher than the first power voltage;
and
a first storage module;
wherein a second end of the lighting device is electrically connected to a ground.

4 more elements

A display panel, comprising a pixel driving circuit configured to drive a lighting device to generate light, the pixel driving circuit comprising:

a driving transistor, having a gate, a source and a drain, wherein the drain of the driving transistor is electrically connected to a first end of the lighting device;
a data writing module, electrically connected to the gate of the driving transistor, configured to receive a scan signal and a data signal and to write the data signal to the gate of the driving transistor under a control of the scan signal;
a first control module, electrically connected to a first node, configured to receive a first control signal and a first power voltage and to write the first power voltage into the first node under a control of the first control signal when the first control signal is larger than a first predetermined threshold voltage;
a compensation module, electrically connected to the source of the driving transistor, configured to receive a third power voltage and to input the third power voltage to the source of the driving transistor under a control of the first power voltage, wherein the third power voltage is higher than the first power voltage;
and
a first storage module;
wherein a second end of the lighting device is electrically connected to a ground.

4 more elements

A display device, comprising a display panel having a pixel driving circuit configured to drive a lighting device to generate light, the pixel driving circuit comprising:

a driving transistor, having a gate, a source and a drain, wherein the drain of the driving transistor is electrically connected to a first end of the lighting device;
a data writing module, electrically connected to the gate of the driving transistor, configured to receive a scan signal and a data signal and to write the data signal to the gate of the driving transistor under a control of the scan signal;
a first control module, electrically connected to a first node, configured to receive a first control signal and a first power voltage and to write the first power voltage into the first node under a control of the first control signal when the first control signal is larger than a first predetermined threshold voltage;
a compensation module, electrically connected to the source of the driving transistor, configured to receive a third power voltage and to input the third power voltage to the source of the driving transistor under a control of the first power voltage, wherein the third power voltage is higher than the first power voltage;
and
a first storage module;
wherein a second end of the lighting device is electrically connected to a ground.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/054,522Filed 4 Aug 2020
Priority: CN 202010628792.22 Jul 2020
Published: 16 Jun 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

G09G 3/3233
Using an active matrix: with pixel circuitry controlling the current through the light-emitting element
G09G 3/3291
Details of drivers for data electrodes: in which the data driver supplies a variable data voltage for setting the current through, or the voltage…
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