US 2016/0078808 A1Published application

Pixel architecture and driving method thereof

AssigneeAu Optronics Corporation

InventorChen-Chi LIN

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Abstract

A pixel architecture includes a LED, a transistor, a data receiving unit, a compensation unit, a first switching unit, a second switching unit, and a capacitor. The transistor is configured to drive the LED. The first switching unit transmits a pixel data signal to the transistor according to a first scan signal. The compensation unit transmits a reference voltage. The first switching unit transmits a supply voltage to the transistor according to a second scan signal. The second switching unit transmits the pixel data signal to the transistor according to the second scan signal or a third scan signal. The capacitor is coupled to the transistor and the data receiving unit. The pixel data signal is transmitted to the capacitor at the time that the compensation unit transmit the reference voltage to the transistor.

Claims14

Dependent claims

A pixel architecture, comprising:

a light emitting diode;
a transistor comprising a control terminal, a first terminal and a second terminal, wherein the second terminal of the transistor is electrically coupled to the light emitting diode, and the transistor is configured to drive the light emitting diode according to a voltage difference between the first terminal and the control terminal of the transistor;
a data receiving unit electrically coupled to the control terminal of the transistor, and configured to transmit a pixel data signal to the control terminal of the transistor according to a first scan signal;
a compensation unit electrically coupled to the control terminal of the transistor and the data receiving unit, and configured to transmit a reference voltage to the control terminal of the transistor;
a first switching unit electrically coupled to the first terminal of the transistor, and configured to receive a supply voltage and to transmit the supply voltage to the first terminal of the transistor according to a second scan signal;
a second switching unit electrically coupled between the control terminal of the transistor and the data receiving unit, configured to transmit the pixel data signal to the control terminal of the transistor according to the second scan signal or a third scan signal;
and
a capacitor electrically coupled to the first terminal of the transistor and the data receiving unit,
wherein the data receiving unit is configured to transmit the pixel data signal to the capacitor at a time that the compensation unit transmits the reference voltage to the control terminal of the transistor.

6 more elements

A driving method for driving a pixel architecture, the pixel architecture comprising a light emitting diode, a data receiving unit, a transistor and a compensation unit, the transistor comprising a first terminal, a second terminal and a control terminal, the second terminal being electrically coupled to the light emitting diode, the data receiving unit being electrically coupled to the control terminal of the transistor, the compensation unit being electrically coupled to the second terminal and the control terminal of the transistor, and the driving method comprising:

transmitting a reference voltage to the control terminal of the transistor by the compensation unit;
receiving a pixel data signal by the data receiving unit;
electrically coupling the control terminal of the transistor to the second terminal of the transistor through the compensation unit;
transmitting the pixel data signal to the control terminal of the transistor;
and
generating a driving current to the light emitting diode according to a voltage difference between the first terminal and the control terminal of the transistor.

3 more elements

A pixel architecture, comprising:

a light emitting diode;
a first transistor comprising:
a first terminal;
a second terminal electrically coupled to the light emitting diode;
and
a control terminal;
a second transistor comprising:
a first terminal configured to receive a pixel data signal;
a second terminal electrically coupled to the control terminal of the first transistor;
and
a control terminal configured to receive a first scan signal, so that the pixel data signal is transmitted from the first terminal of the second transistor to the second terminal of the second transistor;
a third transistor comprising:
a first terminal electrically coupled to the control terminal of the first transistor;
a second terminal electrically coupled to the light emitting diode and the second terminal of the first transistor;
and
a control terminal configured to receive the first scan signal, so that the first terminal of the third transistor is coupled to the second terminal of the third transistor;
a fourth transistor comprising:
a first terminal configured to receive a supply voltage;
a second terminal electrically coupled to the first terminal of the first transistor;
and
a control terminal configured to receive a second scan signal, so that the supply voltage is transmitted to the first terminal of the first transistor;
a fifth transistor comprising:
a first terminal electrically coupled to the second terminal of the second transistor;
a second terminal electrically coupled to the control terminal of the first transistor;
and
a control terminal configured to receive the second scan signal or a third scan signal, so that the first terminal of the fifth transistor is coupled to the second terminal of the fifth transistor;
and
a capacitor, comprising:
a first terminal electrically coupled to the first terminal of the first transistor;
and
a second terminal electrically coupled to the second terminal of the second transistor.

28 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/613,567Filed 4 Feb 2015
Priority: TW 10313178015 Sep 2014
Published: 17 Mar 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

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 2300/0861
Forming a memory circuit, e.g. a dynamic memory with one capacitor: with additional control of the display period without amending the charge…
G09G 2310/0251
Details of the generation of driving signals: precharge or discharge of pixel before applying new pixel voltage