US 2015/0310804 A1Published application

Pixel circuits, organic electroluminescent display panels and display devices

AssigneeBoe Technology Group Co., Ltd.

InventorZhanjie MA

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Abstract

A pixel circuit, an organic electroluminescent display panels and a display device is configured to improve image brightness uniformity in the displaying region of the display device. The pixel circuit comprises a capacitor (CST), a light emitting device (D1), a driving control sub-module (1), a charging and resetting sub-module (2), and a light-emitting control sub-module (3). A first terminal of the capacitor (CST) serves as a first node (A), and a second terminal of the capacitor (CST) servers as a second node (B). A first terminal (x) of the light emitting device (D1) is connected to a fifth terminal (e′) of the light emitting control sub-module (3), and a second terminal (y) of the light emitting device is connected to a second reference signal terminal (Vref2). When the charging and resetting sub-module (2) is turned on, the data signal is written to the first node (A), and the first terminal and third terminal of the driving control sub-module (2) are shorted, which can reset the voltage of the second node (B) and charge the capacitor (CST). When the light emitting control sub-module (3) is turned on, the driving control sub-module (1) and the light emitting device (D1) are connected and the light emitting device (D1) is driven to emit light.

Claims20

Dependent claims

A pixel circuit comprising a light emitting device, a capacitor, a driving control sub-module, a charging and resetting sub-module and a light emitting control sub-module, wherein

a first terminal of the capacitor as a first node is connected to a first terminal of the charging and resetting sub-module and a first terminal of the light emitting control sub-module respectively, a second terminal of the capacitor as a second node is connected to a second terminal of the charging and resetting sub-module and a first terminal of the driving control sub-module respectively;
a second terminal of the driving control sub-module is connected to a first reference signal terminal, a third terminal of the driving control sub-module is connected to a third terminal of the charging and resetting sub-module and a second terminal of the light emitting control sub-module respectively, the driving control sub-module is controlled by the second node to drive the light emitting device to emit light;
a fourth terminal of the charging and resetting sub-module is connected to a data signal terminal, a fifth terminal of the charging and resetting sub-module is connected to a gate signal terminal, the charging and resetting sub-module is controlled by the gate signal terminal to transmit data signals from the data signal terminal;
and
a third terminal of the light emitting control sub-module is connected to a light emitting signal terminal, a fourth terminal of the light emitting control sub-module is connected to the first reference signal terminal, a fifth terminal of the light emitting control sub-module is connected to a first terminal of the light emitting device, and a second terminal of the light emitting device is connected to a second reference terminal, the light emitting control sub-module is adapted to drive the light emitting device to emit light under the control of the light emitting signal terminal.

2 more elements

An organic electroluminescent display panel comprising a pixel circuit comprising a light emitting device, a capacitor, a driving control sub-module, a charging and resetting sub-module and a light emitting control sub-module, wherein

a first terminal of the capacitor as a first node is connected to a first terminal of the charging and resetting sub-module and a first terminal of the light emitting control sub-module respectively, a second terminal of the capacitor as a second node is connected to a second terminal of the charging and resetting sub-module and a first terminal of the driving control sub-module respectively;
a second terminal of the driving control sub-module is connected to a first reference signal terminal, a third terminal of the driving control sub-module is connected to a third terminal of the charging and resetting sub-module and a second terminal of the light emitting control sub-module respectively, the driving control sub-module is controlled by the second node to drive the light emitting device to emit light;
a fourth terminal of the charging and resetting sub-module is connected to a data signal terminal, a fifth terminal of the charging and resetting sub-module is connected to a gate signal terminal, the charging and resetting sub-module is controlled by the gate signal terminal to transmit data signals from the data signal terminal;
and
a third terminal of the light emitting control sub-module is connected to a light emitting signal terminal, a fourth terminal of the light emitting control sub-module is connected to the first reference signal terminal, a fifth terminal of the light emitting control sub-module is connected to a first terminal of the light emitting device, and a second terminal of the light emitting device is connected to a second reference terminal, the light emitting control sub-module is adapted to drive the light emitting device to emit light under the control of the light emitting signal terminal.

2 more elements

A display device comprising an organic electroluminescent display panel comprising a pixel circuit comprising a light emitting device, a capacitor, a driving control sub-module, a charging and resetting sub-module and a light emitting control sub-module, wherein

a first terminal of the capacitor as a first node is connected to a first terminal of the charging and resetting sub-module and a first terminal of the light emitting control sub-module respectively, a second terminal of the capacitor as a second node is connected to a second terminal of the charging and resetting sub-module and a first terminal of the driving control sub-module respectively;
a second terminal of the driving control sub-module is connected to a first reference signal terminal, a third terminal of the driving control sub-module is connected to a third terminal of the charging and resetting sub-module and a second terminal of the light emitting control sub-module respectively, the driving control sub-module is controlled by the second node to drive the light emitting device to emit light;
a fourth terminal of the charging and resetting sub-module is connected to a data signal terminal, a fifth terminal of the charging and resetting sub-module is connected to a gate signal terminal, the charging and resetting sub-module is controlled by the gate signal terminal to transmit data signals from the data signal terminal;
and
a third terminal of the light emitting control sub-module is connected to a light emitting signal terminal, a fourth terminal of the light emitting control sub-module is connected to the first reference signal terminal, a fifth terminal of the light emitting control sub-module is connected to a first terminal of the light emitting device, and a second terminal of the light emitting device is connected to a second reference terminal, the light emitting control sub-module is adapted to drive the light emitting device to emit light under the control of the light emitting signal terminal.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/359,165Filed 10 May 2013
Priority: CN 201310070460.76 Mar 2013
Published: 29 Oct 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

G09G 3/3241
With pixel circuitry controlling the current through the light-emitting element: the current through the light-emitting element being set using a…
G09G 3/3208
Semiconductive, e.g. using light-emitting diodes [LED]: organic, e.g. using organic light-emitting diodes [OLED]
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